1 /*
2 +----------------------------------------------------------------------+
3 | Copyright (c) The PHP Group |
4 +----------------------------------------------------------------------+
5 | This source file is subject to version 3.01 of the PHP license, |
6 | that is bundled with this package in the file LICENSE, and is |
7 | available through the world-wide-web at the following url: |
8 | https://www.php.net/license/3_01.txt |
9 | If you did not receive a copy of the PHP license and are unable to |
10 | obtain it through the world-wide-web, please send a note to |
11 | license@php.net so we can mail you a copy immediately. |
12 +----------------------------------------------------------------------+
13 | Authors: Rasmus Lerdorf <rasmus@php.net> |
14 | Marcus Boerger <helly@php.net> |
15 +----------------------------------------------------------------------+
16 */
17
18 #ifdef HAVE_CONFIG_H
19 #include "config.h"
20 #endif
21
22 #include "php.h"
23 #include "ext/standard/file.h"
24
25 /* When EXIF_DEBUG is defined the module generates a lot of debug messages
26 * that help understanding what is going on. This can and should be used
27 * while extending the module as it shows if you are at the right position.
28 * You are always considered to have a copy of TIFF6.0 and EXIF2.10 standard.
29 */
30 #undef EXIF_DEBUG
31
32 #ifdef EXIF_DEBUG
33 #define EXIFERR_DC , const char *_file, size_t _line
34 #define EXIFERR_CC , __FILE__, __LINE__
35 #else
36 #define EXIFERR_DC
37 #define EXIFERR_CC
38 #endif
39
40 #include "php_exif.h"
41 #include "exif_arginfo.h"
42 #include <math.h>
43 #include "php_ini.h"
44 #include "ext/standard/php_string.h"
45 #include "ext/standard/php_image.h"
46 #include "ext/standard/info.h"
47
48 /* needed for ssize_t definition */
49 #include <sys/types.h>
50
51 #ifdef __SANITIZE_ADDRESS__
52 # include <sanitizer/asan_interface.h>
53 #endif
54
55 typedef unsigned char uchar;
56
57 #ifndef max
58 # define max(a,b) ((a)>(b) ? (a) : (b))
59 #endif
60
61 #define EFREE_IF(ptr) if (ptr) efree(ptr)
62
63 #define MAX_IFD_NESTING_LEVEL 10
64 #define MAX_IFD_TAGS 1000
65
66 /* {{{ PHP_MINFO_FUNCTION */
PHP_MINFO_FUNCTION(exif)67 PHP_MINFO_FUNCTION(exif)
68 {
69 php_info_print_table_start();
70 php_info_print_table_row(2, "EXIF Support", "enabled");
71 php_info_print_table_row(2, "Supported EXIF Version", "0220");
72 php_info_print_table_row(2, "Supported filetypes", "JPEG, TIFF");
73
74 if (zend_hash_str_exists(&module_registry, "mbstring", sizeof("mbstring")-1)) {
75 php_info_print_table_row(2, "Multibyte decoding support using mbstring", "enabled");
76 } else {
77 php_info_print_table_row(2, "Multibyte decoding support using mbstring", "disabled");
78 }
79
80 php_info_print_table_row(2, "Extended EXIF tag formats", "Canon, Casio, Fujifilm, Nikon, Olympus, Samsung, Panasonic, DJI, Sony, Pentax, Minolta, Sigma, Foveon, Kyocera, Ricoh, AGFA, Epson");
81 php_info_print_table_end();
82
83 DISPLAY_INI_ENTRIES();
84 }
85 /* }}} */
86
87 ZEND_BEGIN_MODULE_GLOBALS(exif)
88 char * encode_unicode;
89 char * decode_unicode_be;
90 char * decode_unicode_le;
91 char * encode_jis;
92 char * decode_jis_be;
93 char * decode_jis_le;
94 HashTable *tag_table_cache;
95 ZEND_END_MODULE_GLOBALS(exif)
96
ZEND_DECLARE_MODULE_GLOBALS(exif)97 ZEND_DECLARE_MODULE_GLOBALS(exif)
98 #define EXIF_G(v) ZEND_MODULE_GLOBALS_ACCESSOR(exif, v)
99
100 #if defined(ZTS) && defined(COMPILE_DL_EXIF)
101 ZEND_TSRMLS_CACHE_DEFINE()
102 #endif
103
104 /* {{{ PHP_INI */
105
106 ZEND_INI_MH(OnUpdateEncode)
107 {
108 if (new_value && ZSTR_LEN(new_value)) {
109 const zend_encoding **return_list;
110 size_t return_size;
111 if (FAILURE == zend_multibyte_parse_encoding_list(ZSTR_VAL(new_value), ZSTR_LEN(new_value),
112 &return_list, &return_size, 0)) {
113 php_error_docref(NULL, E_WARNING, "Illegal encoding ignored: '%s'", ZSTR_VAL(new_value));
114 return FAILURE;
115 }
116 pefree((void *) return_list, 0);
117 }
118 return OnUpdateString(entry, new_value, mh_arg1, mh_arg2, mh_arg3, stage);
119 }
120
ZEND_INI_MH(OnUpdateDecode)121 ZEND_INI_MH(OnUpdateDecode)
122 {
123 if (new_value) {
124 const zend_encoding **return_list;
125 size_t return_size;
126 if (FAILURE == zend_multibyte_parse_encoding_list(ZSTR_VAL(new_value), ZSTR_LEN(new_value),
127 &return_list, &return_size, 0)) {
128 php_error_docref(NULL, E_WARNING, "Illegal encoding ignored: '%s'", ZSTR_VAL(new_value));
129 return FAILURE;
130 }
131 pefree((void *) return_list, 0);
132 }
133 return OnUpdateString(entry, new_value, mh_arg1, mh_arg2, mh_arg3, stage);
134 }
135
136 PHP_INI_BEGIN()
137 STD_PHP_INI_ENTRY("exif.encode_unicode", "ISO-8859-15", PHP_INI_ALL, OnUpdateEncode, encode_unicode, zend_exif_globals, exif_globals)
138 STD_PHP_INI_ENTRY("exif.decode_unicode_motorola", "UCS-2BE", PHP_INI_ALL, OnUpdateDecode, decode_unicode_be, zend_exif_globals, exif_globals)
139 STD_PHP_INI_ENTRY("exif.decode_unicode_intel", "UCS-2LE", PHP_INI_ALL, OnUpdateDecode, decode_unicode_le, zend_exif_globals, exif_globals)
140 STD_PHP_INI_ENTRY("exif.encode_jis", "", PHP_INI_ALL, OnUpdateEncode, encode_jis, zend_exif_globals, exif_globals)
141 STD_PHP_INI_ENTRY("exif.decode_jis_motorola", "JIS", PHP_INI_ALL, OnUpdateDecode, decode_jis_be, zend_exif_globals, exif_globals)
142 STD_PHP_INI_ENTRY("exif.decode_jis_intel", "JIS", PHP_INI_ALL, OnUpdateDecode, decode_jis_le, zend_exif_globals, exif_globals)
PHP_INI_END()143 PHP_INI_END()
144 /* }}} */
145
146 /* {{{ PHP_GINIT_FUNCTION */
147 static PHP_GINIT_FUNCTION(exif)
148 {
149 #if defined(COMPILE_DL_EXIF) && defined(ZTS)
150 ZEND_TSRMLS_CACHE_UPDATE();
151 #endif
152 exif_globals->encode_unicode = NULL;
153 exif_globals->decode_unicode_be = NULL;
154 exif_globals->decode_unicode_le = NULL;
155 exif_globals->encode_jis = NULL;
156 exif_globals->decode_jis_be = NULL;
157 exif_globals->decode_jis_le = NULL;
158 exif_globals->tag_table_cache = NULL;
159 }
160 /* }}} */
161
162 /* {{{ PHP_MINIT_FUNCTION(exif) */
PHP_MINIT_FUNCTION(exif)163 PHP_MINIT_FUNCTION(exif)
164 {
165 REGISTER_INI_ENTRIES();
166 if (zend_hash_str_exists(&module_registry, "mbstring", sizeof("mbstring")-1)) {
167 REGISTER_LONG_CONSTANT("EXIF_USE_MBSTRING", 1, CONST_CS | CONST_PERSISTENT);
168 } else {
169 REGISTER_LONG_CONSTANT("EXIF_USE_MBSTRING", 0, CONST_CS | CONST_PERSISTENT);
170 }
171 return SUCCESS;
172 }
173 /* }}} */
174
175 /* {{{ PHP_MSHUTDOWN_FUNCTION */
PHP_MSHUTDOWN_FUNCTION(exif)176 PHP_MSHUTDOWN_FUNCTION(exif)
177 {
178 UNREGISTER_INI_ENTRIES();
179 if (EXIF_G(tag_table_cache)) {
180 zend_hash_destroy(EXIF_G(tag_table_cache));
181 free(EXIF_G(tag_table_cache));
182 }
183 return SUCCESS;
184 }
185 /* }}} */
186
187 /* {{{ exif dependencies */
188 static const zend_module_dep exif_module_deps[] = {
189 ZEND_MOD_REQUIRED("standard")
190 ZEND_MOD_OPTIONAL("mbstring")
191 ZEND_MOD_END
192 };
193 /* }}} */
194
195 /* {{{ exif_module_entry */
196 zend_module_entry exif_module_entry = {
197 STANDARD_MODULE_HEADER_EX, NULL,
198 exif_module_deps,
199 "exif",
200 ext_functions,
201 PHP_MINIT(exif),
202 PHP_MSHUTDOWN(exif),
203 NULL, NULL,
204 PHP_MINFO(exif),
205 PHP_EXIF_VERSION,
206 PHP_MODULE_GLOBALS(exif),
207 PHP_GINIT(exif),
208 NULL,
209 NULL,
210 STANDARD_MODULE_PROPERTIES_EX
211 };
212 /* }}} */
213
214 #ifdef COMPILE_DL_EXIF
ZEND_GET_MODULE(exif)215 ZEND_GET_MODULE(exif)
216 #endif
217
218 /* php_stream_read() may return early without reading all data, depending on the chunk size
219 * and whether it's a URL stream or not. This helper keeps reading until the requested amount
220 * is read or until there is no more data available to read. */
221 static ssize_t exif_read_from_stream_file_looped(php_stream *stream, char *buf, size_t count)
222 {
223 ssize_t total_read = 0;
224 while (total_read < count) {
225 ssize_t ret = php_stream_read(stream, buf + total_read, count - total_read);
226 if (ret == -1) {
227 return -1;
228 }
229 if (ret == 0) {
230 break;
231 }
232 total_read += ret;
233 }
234 return total_read;
235 }
236
237 /* {{{ php_strnlen
238 * get length of string if buffer if less than buffer size or buffer size */
php_strnlen(char * str,size_t maxlen)239 static size_t php_strnlen(char* str, size_t maxlen) {
240 size_t len = 0;
241
242 if (str && maxlen && *str) {
243 do {
244 len++;
245 } while (--maxlen && *(++str));
246 }
247 return len;
248 }
249 /* }}} */
250
251 /* {{{ error messages */
252 static const char * EXIF_ERROR_FILEEOF = "Unexpected end of file reached";
253 static const char * EXIF_ERROR_CORRUPT = "File structure corrupted";
254 static const char * EXIF_ERROR_THUMBEOF = "Thumbnail goes IFD boundary or end of file reached";
255 static const char * EXIF_ERROR_FSREALLOC = "Illegal reallocating of undefined file section";
256
257 #define EXIF_ERRLOG_FILEEOF(ImageInfo) exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "%s", EXIF_ERROR_FILEEOF);
258 #define EXIF_ERRLOG_CORRUPT(ImageInfo) exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "%s", EXIF_ERROR_CORRUPT);
259 #define EXIF_ERRLOG_THUMBEOF(ImageInfo) exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "%s", EXIF_ERROR_THUMBEOF);
260 #define EXIF_ERRLOG_FSREALLOC(ImageInfo) exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "%s", EXIF_ERROR_FSREALLOC);
261 /* }}} */
262
263 /* {{{ format description defines
264 Describes format descriptor
265 */
266 static int php_tiff_bytes_per_format[] = {0, 1, 1, 2, 4, 8, 1, 1, 2, 4, 8, 4, 8, 1};
267 #define NUM_FORMATS 13
268
269 #define TAG_FMT_BYTE 1
270 #define TAG_FMT_STRING 2
271 #define TAG_FMT_USHORT 3
272 #define TAG_FMT_ULONG 4
273 #define TAG_FMT_URATIONAL 5
274 #define TAG_FMT_SBYTE 6
275 #define TAG_FMT_UNDEFINED 7
276 #define TAG_FMT_SSHORT 8
277 #define TAG_FMT_SLONG 9
278 #define TAG_FMT_SRATIONAL 10
279 #define TAG_FMT_SINGLE 11
280 #define TAG_FMT_DOUBLE 12
281 #define TAG_FMT_IFD 13
282
283 #ifdef EXIF_DEBUG
exif_get_tagformat(int format)284 static char *exif_get_tagformat(int format)
285 {
286 switch(format) {
287 case TAG_FMT_BYTE: return "BYTE";
288 case TAG_FMT_STRING: return "STRING";
289 case TAG_FMT_USHORT: return "USHORT";
290 case TAG_FMT_ULONG: return "ULONG";
291 case TAG_FMT_URATIONAL: return "URATIONAL";
292 case TAG_FMT_SBYTE: return "SBYTE";
293 case TAG_FMT_UNDEFINED: return "UNDEFINED";
294 case TAG_FMT_SSHORT: return "SSHORT";
295 case TAG_FMT_SLONG: return "SLONG";
296 case TAG_FMT_SRATIONAL: return "SRATIONAL";
297 case TAG_FMT_SINGLE: return "SINGLE";
298 case TAG_FMT_DOUBLE: return "DOUBLE";
299 case TAG_FMT_IFD: return "IFD";
300 }
301 return "*Illegal";
302 }
303 #endif
304
305 /* Describes tag values */
306 #define TAG_GPS_VERSION_ID 0x0000
307 #define TAG_GPS_LATITUDE_REF 0x0001
308 #define TAG_GPS_LATITUDE 0x0002
309 #define TAG_GPS_LONGITUDE_REF 0x0003
310 #define TAG_GPS_LONGITUDE 0x0004
311 #define TAG_GPS_ALTITUDE_REF 0x0005
312 #define TAG_GPS_ALTITUDE 0x0006
313 #define TAG_GPS_TIME_STAMP 0x0007
314 #define TAG_GPS_SATELLITES 0x0008
315 #define TAG_GPS_STATUS 0x0009
316 #define TAG_GPS_MEASURE_MODE 0x000A
317 #define TAG_GPS_DOP 0x000B
318 #define TAG_GPS_SPEED_REF 0x000C
319 #define TAG_GPS_SPEED 0x000D
320 #define TAG_GPS_TRACK_REF 0x000E
321 #define TAG_GPS_TRACK 0x000F
322 #define TAG_GPS_IMG_DIRECTION_REF 0x0010
323 #define TAG_GPS_IMG_DIRECTION 0x0011
324 #define TAG_GPS_MAP_DATUM 0x0012
325 #define TAG_GPS_DEST_LATITUDE_REF 0x0013
326 #define TAG_GPS_DEST_LATITUDE 0x0014
327 #define TAG_GPS_DEST_LONGITUDE_REF 0x0015
328 #define TAG_GPS_DEST_LONGITUDE 0x0016
329 #define TAG_GPS_DEST_BEARING_REF 0x0017
330 #define TAG_GPS_DEST_BEARING 0x0018
331 #define TAG_GPS_DEST_DISTANCE_REF 0x0019
332 #define TAG_GPS_DEST_DISTANCE 0x001A
333 #define TAG_GPS_PROCESSING_METHOD 0x001B
334 #define TAG_GPS_AREA_INFORMATION 0x001C
335 #define TAG_GPS_DATE_STAMP 0x001D
336 #define TAG_GPS_DIFFERENTIAL 0x001E
337 #define TAG_TIFF_COMMENT 0x00FE /* SHOULDN'T HAPPEN */
338 #define TAG_NEW_SUBFILE 0x00FE /* New version of subfile tag */
339 #define TAG_SUBFILE_TYPE 0x00FF /* Old version of subfile tag */
340 #define TAG_IMAGEWIDTH 0x0100
341 #define TAG_IMAGEHEIGHT 0x0101
342 #define TAG_BITS_PER_SAMPLE 0x0102
343 #define TAG_COMPRESSION 0x0103
344 #define TAG_PHOTOMETRIC_INTERPRETATION 0x0106
345 #define TAG_TRESHHOLDING 0x0107
346 #define TAG_CELL_WIDTH 0x0108
347 #define TAG_CELL_HEIGHT 0x0109
348 #define TAG_FILL_ORDER 0x010A
349 #define TAG_DOCUMENT_NAME 0x010D
350 #define TAG_IMAGE_DESCRIPTION 0x010E
351 #define TAG_MAKE 0x010F
352 #define TAG_MODEL 0x0110
353 #define TAG_STRIP_OFFSETS 0x0111
354 #define TAG_ORIENTATION 0x0112
355 #define TAG_SAMPLES_PER_PIXEL 0x0115
356 #define TAG_ROWS_PER_STRIP 0x0116
357 #define TAG_STRIP_BYTE_COUNTS 0x0117
358 #define TAG_MIN_SAMPPLE_VALUE 0x0118
359 #define TAG_MAX_SAMPLE_VALUE 0x0119
360 #define TAG_X_RESOLUTION 0x011A
361 #define TAG_Y_RESOLUTION 0x011B
362 #define TAG_PLANAR_CONFIGURATION 0x011C
363 #define TAG_PAGE_NAME 0x011D
364 #define TAG_X_POSITION 0x011E
365 #define TAG_Y_POSITION 0x011F
366 #define TAG_FREE_OFFSETS 0x0120
367 #define TAG_FREE_BYTE_COUNTS 0x0121
368 #define TAG_GRAY_RESPONSE_UNIT 0x0122
369 #define TAG_GRAY_RESPONSE_CURVE 0x0123
370 #define TAG_RESOLUTION_UNIT 0x0128
371 #define TAG_PAGE_NUMBER 0x0129
372 #define TAG_TRANSFER_FUNCTION 0x012D
373 #define TAG_SOFTWARE 0x0131
374 #define TAG_DATETIME 0x0132
375 #define TAG_ARTIST 0x013B
376 #define TAG_HOST_COMPUTER 0x013C
377 #define TAG_PREDICTOR 0x013D
378 #define TAG_WHITE_POINT 0x013E
379 #define TAG_PRIMARY_CHROMATICITIES 0x013F
380 #define TAG_COLOR_MAP 0x0140
381 #define TAG_HALFTONE_HINTS 0x0141
382 #define TAG_TILE_WIDTH 0x0142
383 #define TAG_TILE_LENGTH 0x0143
384 #define TAG_TILE_OFFSETS 0x0144
385 #define TAG_TILE_BYTE_COUNTS 0x0145
386 #define TAG_SUB_IFD 0x014A
387 #define TAG_INK_SETMPUTER 0x014C
388 #define TAG_INK_NAMES 0x014D
389 #define TAG_NUMBER_OF_INKS 0x014E
390 #define TAG_DOT_RANGE 0x0150
391 #define TAG_TARGET_PRINTER 0x0151
392 #define TAG_EXTRA_SAMPLE 0x0152
393 #define TAG_SAMPLE_FORMAT 0x0153
394 #define TAG_S_MIN_SAMPLE_VALUE 0x0154
395 #define TAG_S_MAX_SAMPLE_VALUE 0x0155
396 #define TAG_TRANSFER_RANGE 0x0156
397 #define TAG_JPEG_TABLES 0x015B
398 #define TAG_JPEG_PROC 0x0200
399 #define TAG_JPEG_INTERCHANGE_FORMAT 0x0201
400 #define TAG_JPEG_INTERCHANGE_FORMAT_LEN 0x0202
401 #define TAG_JPEG_RESTART_INTERVAL 0x0203
402 #define TAG_JPEG_LOSSLESS_PREDICTOR 0x0205
403 #define TAG_JPEG_POINT_TRANSFORMS 0x0206
404 #define TAG_JPEG_Q_TABLES 0x0207
405 #define TAG_JPEG_DC_TABLES 0x0208
406 #define TAG_JPEG_AC_TABLES 0x0209
407 #define TAG_YCC_COEFFICIENTS 0x0211
408 #define TAG_YCC_SUB_SAMPLING 0x0212
409 #define TAG_YCC_POSITIONING 0x0213
410 #define TAG_REFERENCE_BLACK_WHITE 0x0214
411 /* 0x0301 - 0x0302 */
412 /* 0x0320 */
413 /* 0x0343 */
414 /* 0x5001 - 0x501B */
415 /* 0x5021 - 0x503B */
416 /* 0x5090 - 0x5091 */
417 /* 0x5100 - 0x5101 */
418 /* 0x5110 - 0x5113 */
419 /* 0x80E3 - 0x80E6 */
420 /* 0x828d - 0x828F */
421 #define TAG_COPYRIGHT 0x8298
422 #define TAG_EXPOSURETIME 0x829A
423 #define TAG_FNUMBER 0x829D
424 #define TAG_EXIF_IFD_POINTER 0x8769
425 #define TAG_ICC_PROFILE 0x8773
426 #define TAG_EXPOSURE_PROGRAM 0x8822
427 #define TAG_SPECTRAL_SENSITY 0x8824
428 #define TAG_GPS_IFD_POINTER 0x8825
429 #define TAG_ISOSPEED 0x8827
430 #define TAG_OPTOELECTRIC_CONVERSION_F 0x8828
431 /* 0x8829 - 0x882b */
432 #define TAG_EXIFVERSION 0x9000
433 #define TAG_DATE_TIME_ORIGINAL 0x9003
434 #define TAG_DATE_TIME_DIGITIZED 0x9004
435 #define TAG_COMPONENT_CONFIG 0x9101
436 #define TAG_COMPRESSED_BITS_PER_PIXEL 0x9102
437 #define TAG_SHUTTERSPEED 0x9201
438 #define TAG_APERTURE 0x9202
439 #define TAG_BRIGHTNESS_VALUE 0x9203
440 #define TAG_EXPOSURE_BIAS_VALUE 0x9204
441 #define TAG_MAX_APERTURE 0x9205
442 #define TAG_SUBJECT_DISTANCE 0x9206
443 #define TAG_METRIC_MODULE 0x9207
444 #define TAG_LIGHT_SOURCE 0x9208
445 #define TAG_FLASH 0x9209
446 #define TAG_FOCAL_LENGTH 0x920A
447 /* 0x920B - 0x920D */
448 /* 0x9211 - 0x9216 */
449 #define TAG_SUBJECT_AREA 0x9214
450 #define TAG_MAKER_NOTE 0x927C
451 #define TAG_USERCOMMENT 0x9286
452 #define TAG_SUB_SEC_TIME 0x9290
453 #define TAG_SUB_SEC_TIME_ORIGINAL 0x9291
454 #define TAG_SUB_SEC_TIME_DIGITIZED 0x9292
455 /* 0x923F */
456 /* 0x935C */
457 #define TAG_XP_TITLE 0x9C9B
458 #define TAG_XP_COMMENTS 0x9C9C
459 #define TAG_XP_AUTHOR 0x9C9D
460 #define TAG_XP_KEYWORDS 0x9C9E
461 #define TAG_XP_SUBJECT 0x9C9F
462 #define TAG_FLASH_PIX_VERSION 0xA000
463 #define TAG_COLOR_SPACE 0xA001
464 #define TAG_COMP_IMAGE_WIDTH 0xA002 /* compressed images only */
465 #define TAG_COMP_IMAGE_HEIGHT 0xA003
466 #define TAG_RELATED_SOUND_FILE 0xA004
467 #define TAG_INTEROP_IFD_POINTER 0xA005 /* IFD pointer */
468 #define TAG_FLASH_ENERGY 0xA20B
469 #define TAG_SPATIAL_FREQUENCY_RESPONSE 0xA20C
470 #define TAG_FOCALPLANE_X_RES 0xA20E
471 #define TAG_FOCALPLANE_Y_RES 0xA20F
472 #define TAG_FOCALPLANE_RESOLUTION_UNIT 0xA210
473 #define TAG_SUBJECT_LOCATION 0xA214
474 #define TAG_EXPOSURE_INDEX 0xA215
475 #define TAG_SENSING_METHOD 0xA217
476 #define TAG_FILE_SOURCE 0xA300
477 #define TAG_SCENE_TYPE 0xA301
478 #define TAG_CFA_PATTERN 0xA302
479 #define TAG_CUSTOM_RENDERED 0xA401
480 #define TAG_EXPOSURE_MODE 0xA402
481 #define TAG_WHITE_BALANCE 0xA403
482 #define TAG_DIGITAL_ZOOM_RATIO 0xA404
483 #define TAG_FOCAL_LENGTH_IN_35_MM_FILM 0xA405
484 #define TAG_SCENE_CAPTURE_TYPE 0xA406
485 #define TAG_GAIN_CONTROL 0xA407
486 #define TAG_CONTRAST 0xA408
487 #define TAG_SATURATION 0xA409
488 #define TAG_SHARPNESS 0xA40A
489 #define TAG_DEVICE_SETTING_DESCRIPTION 0xA40B
490 #define TAG_SUBJECT_DISTANCE_RANGE 0xA40C
491 #define TAG_IMAGE_UNIQUE_ID 0xA420
492
493 /* Olympus specific tags */
494 #define TAG_OLYMPUS_SPECIALMODE 0x0200
495 #define TAG_OLYMPUS_JPEGQUAL 0x0201
496 #define TAG_OLYMPUS_MACRO 0x0202
497 #define TAG_OLYMPUS_DIGIZOOM 0x0204
498 #define TAG_OLYMPUS_SOFTWARERELEASE 0x0207
499 #define TAG_OLYMPUS_PICTINFO 0x0208
500 #define TAG_OLYMPUS_CAMERAID 0x0209
501 /* end Olympus specific tags */
502
503 /* Internal */
504 #define TAG_NONE -1 /* note that -1 <> 0xFFFF */
505 #define TAG_COMPUTED_VALUE -2
506 #define TAG_END_OF_LIST 0xFFFD
507
508 /* Values for TAG_PHOTOMETRIC_INTERPRETATION */
509 #define PMI_BLACK_IS_ZERO 0
510 #define PMI_WHITE_IS_ZERO 1
511 #define PMI_RGB 2
512 #define PMI_PALETTE_COLOR 3
513 #define PMI_TRANSPARENCY_MASK 4
514 #define PMI_SEPARATED 5
515 #define PMI_YCBCR 6
516 #define PMI_CIELAB 8
517
518 /* }}} */
519
520 /* {{{ TabTable[] */
521 typedef const struct {
522 unsigned short Tag;
523 char *Desc;
524 } tag_info_type;
525
526 typedef tag_info_type tag_info_array[];
527 typedef tag_info_type *tag_table_type;
528
529 #define TAG_TABLE_END \
530 {TAG_NONE, "No tag value"},\
531 {TAG_COMPUTED_VALUE, "Computed value"},\
532 {TAG_END_OF_LIST, ""} /* Important for exif_get_tagname() IF value != "" function result is != false */
533
534 static tag_info_array tag_table_IFD = {
535 { 0x000B, "ACDComment"},
536 { 0x00FE, "NewSubFile"}, /* better name it 'ImageType' ? */
537 { 0x00FF, "SubFile"},
538 { 0x0100, "ImageWidth"},
539 { 0x0101, "ImageLength"},
540 { 0x0102, "BitsPerSample"},
541 { 0x0103, "Compression"},
542 { 0x0106, "PhotometricInterpretation"},
543 { 0x010A, "FillOrder"},
544 { 0x010D, "DocumentName"},
545 { 0x010E, "ImageDescription"},
546 { 0x010F, "Make"},
547 { 0x0110, "Model"},
548 { 0x0111, "StripOffsets"},
549 { 0x0112, "Orientation"},
550 { 0x0115, "SamplesPerPixel"},
551 { 0x0116, "RowsPerStrip"},
552 { 0x0117, "StripByteCounts"},
553 { 0x0118, "MinSampleValue"},
554 { 0x0119, "MaxSampleValue"},
555 { 0x011A, "XResolution"},
556 { 0x011B, "YResolution"},
557 { 0x011C, "PlanarConfiguration"},
558 { 0x011D, "PageName"},
559 { 0x011E, "XPosition"},
560 { 0x011F, "YPosition"},
561 { 0x0120, "FreeOffsets"},
562 { 0x0121, "FreeByteCounts"},
563 { 0x0122, "GrayResponseUnit"},
564 { 0x0123, "GrayResponseCurve"},
565 { 0x0124, "T4Options"},
566 { 0x0125, "T6Options"},
567 { 0x0128, "ResolutionUnit"},
568 { 0x0129, "PageNumber"},
569 { 0x012D, "TransferFunction"},
570 { 0x0131, "Software"},
571 { 0x0132, "DateTime"},
572 { 0x013B, "Artist"},
573 { 0x013C, "HostComputer"},
574 { 0x013D, "Predictor"},
575 { 0x013E, "WhitePoint"},
576 { 0x013F, "PrimaryChromaticities"},
577 { 0x0140, "ColorMap"},
578 { 0x0141, "HalfToneHints"},
579 { 0x0142, "TileWidth"},
580 { 0x0143, "TileLength"},
581 { 0x0144, "TileOffsets"},
582 { 0x0145, "TileByteCounts"},
583 { 0x014A, "SubIFD"},
584 { 0x014C, "InkSet"},
585 { 0x014D, "InkNames"},
586 { 0x014E, "NumberOfInks"},
587 { 0x0150, "DotRange"},
588 { 0x0151, "TargetPrinter"},
589 { 0x0152, "ExtraSample"},
590 { 0x0153, "SampleFormat"},
591 { 0x0154, "SMinSampleValue"},
592 { 0x0155, "SMaxSampleValue"},
593 { 0x0156, "TransferRange"},
594 { 0x0157, "ClipPath"},
595 { 0x0158, "XClipPathUnits"},
596 { 0x0159, "YClipPathUnits"},
597 { 0x015A, "Indexed"},
598 { 0x015B, "JPEGTables"},
599 { 0x015F, "OPIProxy"},
600 { 0x0200, "JPEGProc"},
601 { 0x0201, "JPEGInterchangeFormat"},
602 { 0x0202, "JPEGInterchangeFormatLength"},
603 { 0x0203, "JPEGRestartInterval"},
604 { 0x0205, "JPEGLosslessPredictors"},
605 { 0x0206, "JPEGPointTransforms"},
606 { 0x0207, "JPEGQTables"},
607 { 0x0208, "JPEGDCTables"},
608 { 0x0209, "JPEGACTables"},
609 { 0x0211, "YCbCrCoefficients"},
610 { 0x0212, "YCbCrSubSampling"},
611 { 0x0213, "YCbCrPositioning"},
612 { 0x0214, "ReferenceBlackWhite"},
613 { 0x02BC, "ExtensibleMetadataPlatform"}, /* XAP: Extensible Authoring Publishing, obsoleted by XMP: Extensible Metadata Platform */
614 { 0x0301, "Gamma"},
615 { 0x0302, "ICCProfileDescriptor"},
616 { 0x0303, "SRGBRenderingIntent"},
617 { 0x0320, "ImageTitle"},
618 { 0x5001, "ResolutionXUnit"},
619 { 0x5002, "ResolutionYUnit"},
620 { 0x5003, "ResolutionXLengthUnit"},
621 { 0x5004, "ResolutionYLengthUnit"},
622 { 0x5005, "PrintFlags"},
623 { 0x5006, "PrintFlagsVersion"},
624 { 0x5007, "PrintFlagsCrop"},
625 { 0x5008, "PrintFlagsBleedWidth"},
626 { 0x5009, "PrintFlagsBleedWidthScale"},
627 { 0x500A, "HalftoneLPI"},
628 { 0x500B, "HalftoneLPIUnit"},
629 { 0x500C, "HalftoneDegree"},
630 { 0x500D, "HalftoneShape"},
631 { 0x500E, "HalftoneMisc"},
632 { 0x500F, "HalftoneScreen"},
633 { 0x5010, "JPEGQuality"},
634 { 0x5011, "GridSize"},
635 { 0x5012, "ThumbnailFormat"},
636 { 0x5013, "ThumbnailWidth"},
637 { 0x5014, "ThumbnailHeight"},
638 { 0x5015, "ThumbnailColorDepth"},
639 { 0x5016, "ThumbnailPlanes"},
640 { 0x5017, "ThumbnailRawBytes"},
641 { 0x5018, "ThumbnailSize"},
642 { 0x5019, "ThumbnailCompressedSize"},
643 { 0x501A, "ColorTransferFunction"},
644 { 0x501B, "ThumbnailData"},
645 { 0x5020, "ThumbnailImageWidth"},
646 { 0x5021, "ThumbnailImageHeight"},
647 { 0x5022, "ThumbnailBitsPerSample"},
648 { 0x5023, "ThumbnailCompression"},
649 { 0x5024, "ThumbnailPhotometricInterp"},
650 { 0x5025, "ThumbnailImageDescription"},
651 { 0x5026, "ThumbnailEquipMake"},
652 { 0x5027, "ThumbnailEquipModel"},
653 { 0x5028, "ThumbnailStripOffsets"},
654 { 0x5029, "ThumbnailOrientation"},
655 { 0x502A, "ThumbnailSamplesPerPixel"},
656 { 0x502B, "ThumbnailRowsPerStrip"},
657 { 0x502C, "ThumbnailStripBytesCount"},
658 { 0x502D, "ThumbnailResolutionX"},
659 { 0x502E, "ThumbnailResolutionY"},
660 { 0x502F, "ThumbnailPlanarConfig"},
661 { 0x5030, "ThumbnailResolutionUnit"},
662 { 0x5031, "ThumbnailTransferFunction"},
663 { 0x5032, "ThumbnailSoftwareUsed"},
664 { 0x5033, "ThumbnailDateTime"},
665 { 0x5034, "ThumbnailArtist"},
666 { 0x5035, "ThumbnailWhitePoint"},
667 { 0x5036, "ThumbnailPrimaryChromaticities"},
668 { 0x5037, "ThumbnailYCbCrCoefficients"},
669 { 0x5038, "ThumbnailYCbCrSubsampling"},
670 { 0x5039, "ThumbnailYCbCrPositioning"},
671 { 0x503A, "ThumbnailRefBlackWhite"},
672 { 0x503B, "ThumbnailCopyRight"},
673 { 0x5090, "LuminanceTable"},
674 { 0x5091, "ChrominanceTable"},
675 { 0x5100, "FrameDelay"},
676 { 0x5101, "LoopCount"},
677 { 0x5110, "PixelUnit"},
678 { 0x5111, "PixelPerUnitX"},
679 { 0x5112, "PixelPerUnitY"},
680 { 0x5113, "PaletteHistogram"},
681 { 0x1000, "RelatedImageFileFormat"},
682 { 0x800D, "ImageID"},
683 { 0x80E3, "Matteing"}, /* obsoleted by ExtraSamples */
684 { 0x80E4, "DataType"}, /* obsoleted by SampleFormat */
685 { 0x80E5, "ImageDepth"},
686 { 0x80E6, "TileDepth"},
687 { 0x828D, "CFARepeatPatternDim"},
688 { 0x828E, "CFAPattern"},
689 { 0x828F, "BatteryLevel"},
690 { 0x8298, "Copyright"},
691 { 0x829A, "ExposureTime"},
692 { 0x829D, "FNumber"},
693 { 0x83BB, "IPTC/NAA"},
694 { 0x84E3, "IT8RasterPadding"},
695 { 0x84E5, "IT8ColorTable"},
696 { 0x8649, "ImageResourceInformation"}, /* PhotoShop */
697 { 0x8769, "Exif_IFD_Pointer"},
698 { 0x8773, "ICC_Profile"},
699 { 0x8822, "ExposureProgram"},
700 { 0x8824, "SpectralSensity"},
701 { 0x8825, "GPS_IFD_Pointer"},
702 { 0x8827, "ISOSpeedRatings"},
703 { 0x8828, "OECF"},
704 { 0x9000, "ExifVersion"},
705 { 0x9003, "DateTimeOriginal"},
706 { 0x9004, "DateTimeDigitized"},
707 { 0x9101, "ComponentsConfiguration"},
708 { 0x9102, "CompressedBitsPerPixel"},
709 { 0x9201, "ShutterSpeedValue"},
710 { 0x9202, "ApertureValue"},
711 { 0x9203, "BrightnessValue"},
712 { 0x9204, "ExposureBiasValue"},
713 { 0x9205, "MaxApertureValue"},
714 { 0x9206, "SubjectDistance"},
715 { 0x9207, "MeteringMode"},
716 { 0x9208, "LightSource"},
717 { 0x9209, "Flash"},
718 { 0x920A, "FocalLength"},
719 { 0x920B, "FlashEnergy"}, /* 0xA20B in JPEG */
720 { 0x920C, "SpatialFrequencyResponse"}, /* 0xA20C - - */
721 { 0x920D, "Noise"},
722 { 0x920E, "FocalPlaneXResolution"}, /* 0xA20E - - */
723 { 0x920F, "FocalPlaneYResolution"}, /* 0xA20F - - */
724 { 0x9210, "FocalPlaneResolutionUnit"}, /* 0xA210 - - */
725 { 0x9211, "ImageNumber"},
726 { 0x9212, "SecurityClassification"},
727 { 0x9213, "ImageHistory"},
728 { 0x9214, "SubjectLocation"}, /* 0xA214 - - */
729 { 0x9215, "ExposureIndex"}, /* 0xA215 - - */
730 { 0x9216, "TIFF/EPStandardID"},
731 { 0x9217, "SensingMethod"}, /* 0xA217 - - */
732 { 0x923F, "StoNits"},
733 { 0x927C, "MakerNote"},
734 { 0x9286, "UserComment"},
735 { 0x9290, "SubSecTime"},
736 { 0x9291, "SubSecTimeOriginal"},
737 { 0x9292, "SubSecTimeDigitized"},
738 { 0x935C, "ImageSourceData"}, /* "Adobe Photoshop Document Data Block": 8BIM... */
739 { 0x9c9b, "Title" }, /* Win XP specific, Unicode */
740 { 0x9c9c, "Comments" }, /* Win XP specific, Unicode */
741 { 0x9c9d, "Author" }, /* Win XP specific, Unicode */
742 { 0x9c9e, "Keywords" }, /* Win XP specific, Unicode */
743 { 0x9c9f, "Subject" }, /* Win XP specific, Unicode, not to be confused with SubjectDistance and SubjectLocation */
744 { 0xA000, "FlashPixVersion"},
745 { 0xA001, "ColorSpace"},
746 { 0xA002, "ExifImageWidth"},
747 { 0xA003, "ExifImageLength"},
748 { 0xA004, "RelatedSoundFile"},
749 { 0xA005, "InteroperabilityOffset"},
750 { 0xA20B, "FlashEnergy"}, /* 0x920B in TIFF/EP */
751 { 0xA20C, "SpatialFrequencyResponse"}, /* 0x920C - - */
752 { 0xA20D, "Noise"},
753 { 0xA20E, "FocalPlaneXResolution"}, /* 0x920E - - */
754 { 0xA20F, "FocalPlaneYResolution"}, /* 0x920F - - */
755 { 0xA210, "FocalPlaneResolutionUnit"}, /* 0x9210 - - */
756 { 0xA211, "ImageNumber"},
757 { 0xA212, "SecurityClassification"},
758 { 0xA213, "ImageHistory"},
759 { 0xA214, "SubjectLocation"}, /* 0x9214 - - */
760 { 0xA215, "ExposureIndex"}, /* 0x9215 - - */
761 { 0xA216, "TIFF/EPStandardID"},
762 { 0xA217, "SensingMethod"}, /* 0x9217 - - */
763 { 0xA300, "FileSource"},
764 { 0xA301, "SceneType"},
765 { 0xA302, "CFAPattern"},
766 { 0xA401, "CustomRendered"},
767 { 0xA402, "ExposureMode"},
768 { 0xA403, "WhiteBalance"},
769 { 0xA404, "DigitalZoomRatio"},
770 { 0xA405, "FocalLengthIn35mmFilm"},
771 { 0xA406, "SceneCaptureType"},
772 { 0xA407, "GainControl"},
773 { 0xA408, "Contrast"},
774 { 0xA409, "Saturation"},
775 { 0xA40A, "Sharpness"},
776 { 0xA40B, "DeviceSettingDescription"},
777 { 0xA40C, "SubjectDistanceRange"},
778 { 0xA420, "ImageUniqueID"},
779 TAG_TABLE_END
780 } ;
781
782 static tag_info_array tag_table_GPS = {
783 { 0x0000, "GPSVersion"},
784 { 0x0001, "GPSLatitudeRef"},
785 { 0x0002, "GPSLatitude"},
786 { 0x0003, "GPSLongitudeRef"},
787 { 0x0004, "GPSLongitude"},
788 { 0x0005, "GPSAltitudeRef"},
789 { 0x0006, "GPSAltitude"},
790 { 0x0007, "GPSTimeStamp"},
791 { 0x0008, "GPSSatellites"},
792 { 0x0009, "GPSStatus"},
793 { 0x000A, "GPSMeasureMode"},
794 { 0x000B, "GPSDOP"},
795 { 0x000C, "GPSSpeedRef"},
796 { 0x000D, "GPSSpeed"},
797 { 0x000E, "GPSTrackRef"},
798 { 0x000F, "GPSTrack"},
799 { 0x0010, "GPSImgDirectionRef"},
800 { 0x0011, "GPSImgDirection"},
801 { 0x0012, "GPSMapDatum"},
802 { 0x0013, "GPSDestLatitudeRef"},
803 { 0x0014, "GPSDestLatitude"},
804 { 0x0015, "GPSDestLongitudeRef"},
805 { 0x0016, "GPSDestLongitude"},
806 { 0x0017, "GPSDestBearingRef"},
807 { 0x0018, "GPSDestBearing"},
808 { 0x0019, "GPSDestDistanceRef"},
809 { 0x001A, "GPSDestDistance"},
810 { 0x001B, "GPSProcessingMode"},
811 { 0x001C, "GPSAreaInformation"},
812 { 0x001D, "GPSDateStamp"},
813 { 0x001E, "GPSDifferential"},
814 TAG_TABLE_END
815 };
816
817 static tag_info_array tag_table_IOP = {
818 { 0x0001, "InterOperabilityIndex"}, /* should be 'R98' or 'THM' */
819 { 0x0002, "InterOperabilityVersion"},
820 { 0x1000, "RelatedFileFormat"},
821 { 0x1001, "RelatedImageWidth"},
822 { 0x1002, "RelatedImageHeight"},
823 TAG_TABLE_END
824 };
825
826 static tag_info_array tag_table_VND_CANON = {
827 { 0x0001, "ModeArray"}, /* guess */
828 { 0x0004, "ImageInfo"}, /* guess */
829 { 0x0006, "ImageType"},
830 { 0x0007, "FirmwareVersion"},
831 { 0x0008, "ImageNumber"},
832 { 0x0009, "OwnerName"},
833 { 0x000C, "Camera"},
834 { 0x000F, "CustomFunctions"},
835 TAG_TABLE_END
836 };
837
838 static tag_info_array tag_table_VND_CASIO = {
839 { 0x0001, "RecordingMode"},
840 { 0x0002, "Quality"},
841 { 0x0003, "FocusingMode"},
842 { 0x0004, "FlashMode"},
843 { 0x0005, "FlashIntensity"},
844 { 0x0006, "ObjectDistance"},
845 { 0x0007, "WhiteBalance"},
846 { 0x000A, "DigitalZoom"},
847 { 0x000B, "Sharpness"},
848 { 0x000C, "Contrast"},
849 { 0x000D, "Saturation"},
850 { 0x0014, "CCDSensitivity"},
851 TAG_TABLE_END
852 };
853
854 static tag_info_array tag_table_VND_FUJI = {
855 { 0x0000, "Version"},
856 { 0x1000, "Quality"},
857 { 0x1001, "Sharpness"},
858 { 0x1002, "WhiteBalance"},
859 { 0x1003, "Color"},
860 { 0x1004, "Tone"},
861 { 0x1010, "FlashMode"},
862 { 0x1011, "FlashStrength"},
863 { 0x1020, "Macro"},
864 { 0x1021, "FocusMode"},
865 { 0x1030, "SlowSync"},
866 { 0x1031, "PictureMode"},
867 { 0x1100, "ContTake"},
868 { 0x1300, "BlurWarning"},
869 { 0x1301, "FocusWarning"},
870 { 0x1302, "AEWarning "},
871 TAG_TABLE_END
872 };
873
874 static tag_info_array tag_table_VND_NIKON = {
875 { 0x0003, "Quality"},
876 { 0x0004, "ColorMode"},
877 { 0x0005, "ImageAdjustment"},
878 { 0x0006, "CCDSensitivity"},
879 { 0x0007, "WhiteBalance"},
880 { 0x0008, "Focus"},
881 { 0x000a, "DigitalZoom"},
882 { 0x000b, "Converter"},
883 TAG_TABLE_END
884 };
885
886 static tag_info_array tag_table_VND_NIKON_990 = {
887 { 0x0001, "Version"},
888 { 0x0002, "ISOSetting"},
889 { 0x0003, "ColorMode"},
890 { 0x0004, "Quality"},
891 { 0x0005, "WhiteBalance"},
892 { 0x0006, "ImageSharpening"},
893 { 0x0007, "FocusMode"},
894 { 0x0008, "FlashSetting"},
895 { 0x000F, "ISOSelection"},
896 { 0x0080, "ImageAdjustment"},
897 { 0x0082, "AuxiliaryLens"},
898 { 0x0085, "ManualFocusDistance"},
899 { 0x0086, "DigitalZoom"},
900 { 0x0088, "AFFocusPosition"},
901 { 0x0010, "DataDump"},
902 TAG_TABLE_END
903 };
904
905 static tag_info_array tag_table_VND_OLYMPUS = {
906 { 0x0200, "SpecialMode"},
907 { 0x0201, "JPEGQuality"},
908 { 0x0202, "Macro"},
909 { 0x0204, "DigitalZoom"},
910 { 0x0207, "SoftwareRelease"},
911 { 0x0208, "PictureInfo"},
912 { 0x0209, "CameraId"},
913 { 0x0F00, "DataDump"},
914 TAG_TABLE_END
915 };
916
917 static tag_info_array tag_table_VND_SAMSUNG = {
918 { 0x0001, "Version"},
919 { 0x0021, "PictureWizard"},
920 { 0x0030, "LocalLocationName"},
921 { 0x0031, "LocationName"},
922 { 0x0035, "Preview"},
923 { 0x0043, "CameraTemperature"},
924 { 0xa001, "FirmwareName"},
925 { 0xa003, "LensType"},
926 { 0xa004, "LensFirmware"},
927 { 0xa010, "SensorAreas"},
928 { 0xa011, "ColorSpace"},
929 { 0xa012, "SmartRange"},
930 { 0xa013, "ExposureBiasValue"},
931 { 0xa014, "ISO"},
932 { 0xa018, "ExposureTime"},
933 { 0xa019, "FNumber"},
934 { 0xa01a, "FocalLengthIn35mmFormat"},
935 { 0xa020, "EncryptionKey"},
936 { 0xa021, "WB_RGGBLevelsUncorrected"},
937 { 0xa022, "WB_RGGBLevelsAuto"},
938 { 0xa023, "WB_RGGBLevelsIlluminator1"},
939 { 0xa024, "WB_RGGBLevelsIlluminator2"},
940 { 0xa028, "WB_RGGBLevelsBlack"},
941 { 0xa030, "ColorMatrix"},
942 { 0xa031, "ColorMatrixSRGB"},
943 { 0xa032, "ColorMatrixAdobeRGB"},
944 { 0xa040, "ToneCurve1"},
945 { 0xa041, "ToneCurve2"},
946 { 0xa042, "ToneCurve3"},
947 { 0xa043, "ToneCurve4"},
948 TAG_TABLE_END
949 };
950
951 static tag_info_array tag_table_VND_PANASONIC = {
952 { 0x0001, "Quality"},
953 { 0x0002, "FirmwareVersion"},
954 { 0x0003, "WhiteBalance"},
955 { 0x0007, "FocusMode"},
956 { 0x000f, "AFMode"},
957 { 0x001a, "ImageStabilization"},
958 { 0x001c, "Macro"},
959 { 0x001f, "ShootingMode"},
960 { 0x0020, "Audio"},
961 { 0x0021, "DataDump"},
962 { 0x0023, "WhiteBalanceBias"},
963 { 0x0024, "FlashBias"},
964 { 0x0025, "InternalSerialNumber"},
965 { 0x0026, "ExifVersion"},
966 { 0x0028, "ColorEffect"},
967 { 0x0029, "TimeSincePowerOn"},
968 { 0x002a, "BurstMode"},
969 { 0x002b, "SequenceNumber"},
970 { 0x002c, "Contrast"},
971 { 0x002d, "NoiseReduction"},
972 { 0x002e, "SelfTimer"},
973 { 0x0030, "Rotation"},
974 { 0x0031, "AFAssistLamp"},
975 { 0x0032, "ColorMode"},
976 { 0x0033, "BabyAge1"},
977 { 0x0034, "OpticalZoomMode"},
978 { 0x0035, "ConversionLens"},
979 { 0x0036, "TravelDay"},
980 { 0x0039, "Contrast"},
981 { 0x003a, "WorldTimeLocation"},
982 { 0x003b, "TextStamp1"},
983 { 0x003c, "ProgramISO"},
984 { 0x003d, "AdvancedSceneType"},
985 { 0x003e, "TextStamp2"},
986 { 0x003f, "FacesDetected"},
987 { 0x0040, "Saturation"},
988 { 0x0041, "Sharpness"},
989 { 0x0042, "FilmMode"},
990 { 0x0044, "ColorTempKelvin"},
991 { 0x0045, "BracketSettings"},
992 { 0x0046, "WBAdjustAB"},
993 { 0x0047, "WBAdjustGM"},
994 { 0x0048, "FlashCurtain"},
995 { 0x0049, "LongShutterNoiseReduction"},
996 { 0x004b, "ImageWidth"},
997 { 0x004c, "ImageHeight"},
998 { 0x004d, "AFPointPosition"},
999 { 0x004e, "FaceDetInfo"},
1000 { 0x0051, "LensType"},
1001 { 0x0052, "LensSerialNumber"},
1002 { 0x0053, "AccessoryType"},
1003 { 0x0054, "AccessorySerialNumber"},
1004 { 0x0059, "Transform1"},
1005 { 0x005d, "IntelligentExposure"},
1006 { 0x0060, "LensFirmwareVersion"},
1007 { 0x0061, "FaceRecInfo"},
1008 { 0x0062, "FlashWarning"},
1009 { 0x0065, "Title"},
1010 { 0x0066, "BabyName"},
1011 { 0x0067, "Location"},
1012 { 0x0069, "Country"},
1013 { 0x006b, "State"},
1014 { 0x006d, "City"},
1015 { 0x006f, "Landmark"},
1016 { 0x0070, "IntelligentResolution"},
1017 { 0x0077, "BurstSheed"},
1018 { 0x0079, "IntelligentDRange"},
1019 { 0x007c, "ClearRetouch"},
1020 { 0x0080, "City2"},
1021 { 0x0086, "ManometerPressure"},
1022 { 0x0089, "PhotoStyle"},
1023 { 0x008a, "ShadingCompensation"},
1024 { 0x008c, "AccelerometerZ"},
1025 { 0x008d, "AccelerometerX"},
1026 { 0x008e, "AccelerometerY"},
1027 { 0x008f, "CameraOrientation"},
1028 { 0x0090, "RollAngle"},
1029 { 0x0091, "PitchAngle"},
1030 { 0x0093, "SweepPanoramaDirection"},
1031 { 0x0094, "PanoramaFieldOfView"},
1032 { 0x0096, "TimerRecording"},
1033 { 0x009d, "InternalNDFilter"},
1034 { 0x009e, "HDR"},
1035 { 0x009f, "ShutterType"},
1036 { 0x00a3, "ClearRetouchValue"},
1037 { 0x00ab, "TouchAE"},
1038 { 0x0e00, "PrintIM"},
1039 { 0x8000, "MakerNoteVersion"},
1040 { 0x8001, "SceneMode"},
1041 { 0x8004, "WBRedLevel"},
1042 { 0x8005, "WBGreenLevel"},
1043 { 0x8006, "WBBlueLevel"},
1044 { 0x8007, "FlashFired"},
1045 { 0x8008, "TextStamp3"},
1046 { 0x8009, "TextStamp4"},
1047 { 0x8010, "BabyAge2"},
1048 { 0x8012, "Transform2"},
1049 TAG_TABLE_END
1050 };
1051
1052 static tag_info_array tag_table_VND_DJI = {
1053 { 0x0001, "Make"},
1054 { 0x0003, "SpeedX"},
1055 { 0x0004, "SpeedY"},
1056 { 0x0005, "SpeedZ"},
1057 { 0x0006, "Pitch"},
1058 { 0x0007, "Yaw"},
1059 { 0x0008, "Roll"},
1060 { 0x0009, "CameraPitch"},
1061 { 0x000a, "CameraYaw"},
1062 { 0x000b, "CameraRoll"},
1063 TAG_TABLE_END
1064 };
1065
1066 static tag_info_array tag_table_VND_SONY = {
1067 { 0x0102, "Quality"},
1068 { 0x0104, "FlashExposureComp"},
1069 { 0x0105, "Teleconverter"},
1070 { 0x0112, "WhiteBalanceFineTune"},
1071 { 0x0114, "CameraSettings"},
1072 { 0x0115, "WhiteBalance"},
1073 { 0x0116, "ExtraInfo"},
1074 { 0x0e00, "PrintIM"},
1075 { 0x1000, "MultiBurstMode"},
1076 { 0x1001, "MultiBurstImageWidth"},
1077 { 0x1002, "MultiBurstImageHeight"},
1078 { 0x1003, "Panorama"},
1079 { 0x2001, "PreviewImage"},
1080 { 0x2002, "Rating"},
1081 { 0x2004, "Contrast"},
1082 { 0x2005, "Saturation"},
1083 { 0x2006, "Sharpness"},
1084 { 0x2007, "Brightness"},
1085 { 0x2008, "LongExposureNoiseReduction"},
1086 { 0x2009, "HighISONoiseReduction"},
1087 { 0x200a, "AutoHDR"},
1088 { 0x3000, "ShotInfo"},
1089 { 0xb000, "FileFormat"},
1090 { 0xb001, "SonyModelID"},
1091 { 0xb020, "ColorReproduction"},
1092 { 0xb021, "ColorTemperature"},
1093 { 0xb022, "ColorCompensationFilter"},
1094 { 0xb023, "SceneMode"},
1095 { 0xb024, "ZoneMatching"},
1096 { 0xb025, "DynamicRangeOptimizer"},
1097 { 0xb026, "ImageStabilization"},
1098 { 0xb027, "LensID"},
1099 { 0xb028, "MinoltaMakerNote"},
1100 { 0xb029, "ColorMode"},
1101 { 0xb02b, "FullImageSize"},
1102 { 0xb02c, "PreviewImageSize"},
1103 { 0xb040, "Macro"},
1104 { 0xb041, "ExposureMode"},
1105 { 0xb042, "FocusMode"},
1106 { 0xb043, "AFMode"},
1107 { 0xb044, "AFIlluminator"},
1108 { 0xb047, "JPEGQuality"},
1109 { 0xb048, "FlashLevel"},
1110 { 0xb049, "ReleaseMode"},
1111 { 0xb04a, "SequenceNumber"},
1112 { 0xb04b, "AntiBlur"},
1113 { 0xb04e, "FocusMode"},
1114 { 0xb04f, "DynamicRangeOptimizer"},
1115 { 0xb050, "HighISONoiseReduction2"},
1116 { 0xb052, "IntelligentAuto"},
1117 { 0xb054, "WhiteBalance2"},
1118 TAG_TABLE_END
1119 };
1120
1121 static tag_info_array tag_table_VND_PENTAX = {
1122 { 0x0000, "Version"},
1123 { 0x0001, "Mode"},
1124 { 0x0002, "PreviewResolution"},
1125 { 0x0003, "PreviewLength"},
1126 { 0x0004, "PreviewOffset"},
1127 { 0x0005, "ModelID"},
1128 { 0x0006, "Date"},
1129 { 0x0007, "Time"},
1130 { 0x0008, "Quality"},
1131 { 0x0009, "Size"},
1132 { 0x000c, "Flash"},
1133 { 0x000d, "Focus"},
1134 { 0x000e, "AFPoint"},
1135 { 0x000f, "AFPointInFocus"},
1136 { 0x0012, "ExposureTime"},
1137 { 0x0013, "FNumber"},
1138 { 0x0014, "ISO"},
1139 { 0x0016, "ExposureCompensation"},
1140 { 0x0017, "MeteringMode"},
1141 { 0x0018, "AutoBracketing"},
1142 { 0x0019, "WhiteBalance"},
1143 { 0x001a, "WhiteBalanceMode"},
1144 { 0x001b, "BlueBalance"},
1145 { 0x001c, "RedBalance"},
1146 { 0x001d, "FocalLength"},
1147 { 0x001e, "DigitalZoom"},
1148 { 0x001f, "Saturation"},
1149 { 0x0020, "Contrast"},
1150 { 0x0021, "Sharpness"},
1151 { 0x0022, "Location"},
1152 { 0x0023, "Hometown"},
1153 { 0x0024, "Destination"},
1154 { 0x0025, "HometownDST"},
1155 { 0x0026, "DestinationDST"},
1156 { 0x0027, "DSPFirmwareVersion"},
1157 { 0x0028, "CPUFirmwareVersion"},
1158 { 0x0029, "FrameNumber"},
1159 { 0x002d, "EffectiveLV"},
1160 { 0x0032, "ImageProcessing"},
1161 { 0x0033, "PictureMode"},
1162 { 0x0034, "DriveMode"},
1163 { 0x0037, "ColorSpace"},
1164 { 0x0038, "ImageAreaOffset"},
1165 { 0x0039, "RawImageSize"},
1166 { 0x003e, "PreviewImageBorders"},
1167 { 0x003f, "LensType"},
1168 { 0x0040, "SensitivityAdjust"},
1169 { 0x0041, "DigitalFilter"},
1170 { 0x0047, "Temperature"},
1171 { 0x0048, "AELock"},
1172 { 0x0049, "NoiseReduction"},
1173 { 0x004d, "FlashExposureCompensation"},
1174 { 0x004f, "ImageTone"},
1175 { 0x0050, "ColorTemperature"},
1176 { 0x005c, "ShakeReduction"},
1177 { 0x005d, "ShutterCount"},
1178 { 0x0069, "DynamicRangeExpansion"},
1179 { 0x0071, "HighISONoiseReduction"},
1180 { 0x0072, "AFAdjustment"},
1181 { 0x0200, "BlackPoint"},
1182 { 0x0201, "WhitePoint"},
1183 { 0x0205, "ShotInfo"},
1184 { 0x0206, "AEInfo"},
1185 { 0x0207, "LensInfo"},
1186 { 0x0208, "FlashInfo"},
1187 { 0x0209, "AEMeteringSegments"},
1188 { 0x020a, "FlashADump"},
1189 { 0x020b, "FlashBDump"},
1190 { 0x020d, "WB_RGGBLevelsDaylight"},
1191 { 0x020e, "WB_RGGBLevelsShade"},
1192 { 0x020f, "WB_RGGBLevelsCloudy"},
1193 { 0x0210, "WB_RGGBLevelsTungsten"},
1194 { 0x0211, "WB_RGGBLevelsFluorescentD"},
1195 { 0x0212, "WB_RGGBLevelsFluorescentN"},
1196 { 0x0213, "WB_RGGBLevelsFluorescentW"},
1197 { 0x0214, "WB_RGGBLevelsFlash"},
1198 { 0x0215, "CameraInfo"},
1199 { 0x0216, "BatteryInfo"},
1200 { 0x021f, "AFInfo"},
1201 { 0x0222, "ColorInfo"},
1202 { 0x0229, "SerialNumber"},
1203 TAG_TABLE_END
1204 };
1205
1206 static tag_info_array tag_table_VND_MINOLTA = {
1207 { 0x0000, "Version"},
1208 { 0x0001, "CameraSettingsStdOld"},
1209 { 0x0003, "CameraSettingsStdNew"},
1210 { 0x0004, "CameraSettings7D"},
1211 { 0x0018, "ImageStabilizationData"},
1212 { 0x0020, "WBInfoA100"},
1213 { 0x0040, "CompressedImageSize"},
1214 { 0x0081, "Thumbnail"},
1215 { 0x0088, "ThumbnailOffset"},
1216 { 0x0089, "ThumbnailLength"},
1217 { 0x0100, "SceneMode"},
1218 { 0x0101, "ColorMode"},
1219 { 0x0102, "Quality"},
1220 { 0x0104, "FlashExposureComp"},
1221 { 0x0105, "Teleconverter"},
1222 { 0x0107, "ImageStabilization"},
1223 { 0x0109, "RawAndJpgRecording"},
1224 { 0x010a, "ZoneMatching"},
1225 { 0x010b, "ColorTemperature"},
1226 { 0x010c, "LensID"},
1227 { 0x0111, "ColorCompensationFilter"},
1228 { 0x0112, "WhiteBalanceFineTune"},
1229 { 0x0113, "ImageStabilizationA100"},
1230 { 0x0114, "CameraSettings5D"},
1231 { 0x0115, "WhiteBalance"},
1232 { 0x0e00, "PrintIM"},
1233 { 0x0f00, "CameraSettingsZ1"},
1234 TAG_TABLE_END
1235 };
1236
1237 static tag_info_array tag_table_VND_SIGMA = {
1238 { 0x0002, "SerialNumber"},
1239 { 0x0003, "DriveMode"},
1240 { 0x0004, "ResolutionMode"},
1241 { 0x0005, "AutofocusMode"},
1242 { 0x0006, "FocusSetting"},
1243 { 0x0007, "WhiteBalance"},
1244 { 0x0008, "ExposureMode"},
1245 { 0x0009, "MeteringMode"},
1246 { 0x000a, "LensRange"},
1247 { 0x000b, "ColorSpace"},
1248 { 0x000c, "Exposure"},
1249 { 0x000d, "Contrast"},
1250 { 0x000e, "Shadow"},
1251 { 0x000f, "Highlight"},
1252 { 0x0010, "Saturation"},
1253 { 0x0011, "Sharpness"},
1254 { 0x0012, "FillLight"},
1255 { 0x0014, "ColorAdjustment"},
1256 { 0x0015, "AdjustmentMode"},
1257 { 0x0016, "Quality"},
1258 { 0x0017, "Firmware"},
1259 { 0x0018, "Software"},
1260 { 0x0019, "AutoBracket"},
1261 TAG_TABLE_END
1262 };
1263
1264 static tag_info_array tag_table_VND_KYOCERA = {
1265 { 0x0001, "FormatThumbnail"},
1266 { 0x0E00, "PrintImageMatchingInfo"},
1267 TAG_TABLE_END
1268 };
1269
1270 static tag_info_array tag_table_VND_RICOH = {
1271 { 0x0001, "MakerNoteDataType"},
1272 { 0x0002, "Version"},
1273 { 0x0E00, "PrintImageMatchingInfo"},
1274 { 0x2001, "RicohCameraInfoMakerNoteSubIFD"},
1275 TAG_TABLE_END
1276 };
1277
1278 typedef enum mn_byte_order_t {
1279 MN_ORDER_INTEL = 0,
1280 MN_ORDER_MOTOROLA = 1,
1281 MN_ORDER_NORMAL
1282 } mn_byte_order_t;
1283
1284 typedef enum mn_offset_mode_t {
1285 MN_OFFSET_NORMAL,
1286 MN_OFFSET_MAKER
1287 } mn_offset_mode_t;
1288
1289 typedef struct {
1290 tag_table_type tag_table;
1291 char * make;
1292 char * id_string;
1293 int id_string_len;
1294 int offset;
1295 mn_byte_order_t byte_order;
1296 mn_offset_mode_t offset_mode;
1297 } maker_note_type;
1298
1299 /* Some maker notes (e.g. DJI info tag) require custom parsing */
1300 #define REQUIRES_CUSTOM_PARSING NULL
1301
1302 /* Remember to update PHP_MINFO if updated */
1303 static const maker_note_type maker_note_array[] = {
1304 { tag_table_VND_CANON, "Canon", NULL, 0, 0, MN_ORDER_INTEL, MN_OFFSET_NORMAL},
1305 { tag_table_VND_CASIO, "CASIO", NULL, 0, 0, MN_ORDER_MOTOROLA, MN_OFFSET_NORMAL},
1306 { tag_table_VND_FUJI, "FUJIFILM", "FUJIFILM\x0C\x00\x00\x00", 12, 12, MN_ORDER_INTEL, MN_OFFSET_MAKER},
1307 { tag_table_VND_NIKON, "NIKON", "Nikon\x00\x01\x00", 8, 8, MN_ORDER_NORMAL, MN_OFFSET_NORMAL},
1308 { tag_table_VND_NIKON_990, "NIKON", NULL, 0, 0, MN_ORDER_NORMAL, MN_OFFSET_NORMAL},
1309 { tag_table_VND_OLYMPUS, "OLYMPUS OPTICAL CO.,LTD", "OLYMP\x00\x01\x00", 8, 8, MN_ORDER_NORMAL, MN_OFFSET_NORMAL},
1310 { tag_table_VND_SAMSUNG, "SAMSUNG", NULL, 0, 0, MN_ORDER_NORMAL, MN_OFFSET_NORMAL},
1311 { tag_table_VND_PANASONIC, "Panasonic", "Panasonic\x00\x00\x00", 12, 12, MN_ORDER_NORMAL, MN_OFFSET_NORMAL},
1312 { REQUIRES_CUSTOM_PARSING, "DJI", "[ae_dbg_info:", 13, 13, MN_ORDER_MOTOROLA, MN_OFFSET_NORMAL},
1313 { tag_table_VND_DJI, "DJI", NULL, 0, 0, MN_ORDER_NORMAL, MN_OFFSET_NORMAL},
1314 { tag_table_VND_SONY, "SONY", "SONY DSC \x00\x00\x00", 12, 12, MN_ORDER_NORMAL, MN_OFFSET_NORMAL},
1315 { tag_table_VND_SONY, "SONY", NULL, 0, 0, MN_ORDER_NORMAL, MN_OFFSET_NORMAL},
1316 { tag_table_VND_PENTAX, "PENTAX", "AOC\x00", 6, 6, MN_ORDER_NORMAL, MN_OFFSET_NORMAL},
1317 { tag_table_VND_MINOLTA, "Minolta, KONICA MINOLTA", NULL, 0, 0, MN_ORDER_NORMAL, MN_OFFSET_NORMAL},
1318 { tag_table_VND_SIGMA, "SIGMA, FOVEON", "SIGMA\x00\x00\x00", 10, 10, MN_ORDER_NORMAL, MN_OFFSET_NORMAL},
1319 { tag_table_VND_SIGMA, "SIGMA, FOVEON", "FOVEON\x00\x00\x00", 10, 10, MN_ORDER_NORMAL, MN_OFFSET_NORMAL},
1320 { tag_table_VND_KYOCERA, "KYOCERA, CONTAX", "KYOCERA \x00\x00\x00", 22, 22, MN_ORDER_NORMAL, MN_OFFSET_MAKER},
1321 { tag_table_VND_RICOH, "RICOH", "Ricoh", 5, 5, MN_ORDER_MOTOROLA, MN_OFFSET_NORMAL},
1322 { tag_table_VND_RICOH, "RICOH", "RICOH", 5, 5, MN_ORDER_MOTOROLA, MN_OFFSET_NORMAL},
1323
1324 /* These re-uses existing formats */
1325 { tag_table_VND_OLYMPUS, "AGFA", "AGFA \x00\x01", 8, 8, MN_ORDER_NORMAL, MN_OFFSET_NORMAL},
1326 { tag_table_VND_OLYMPUS, "EPSON", "EPSON\x00\x01\x00", 8, 8, MN_ORDER_NORMAL, MN_OFFSET_NORMAL}
1327 };
1328 /* }}} */
1329
exif_make_tag_ht(tag_info_type * tag_table)1330 static HashTable *exif_make_tag_ht(tag_info_type *tag_table)
1331 {
1332 HashTable *ht = malloc(sizeof(HashTable));
1333 zend_hash_init(ht, 0, NULL, NULL, 1);
1334 while (tag_table->Tag != TAG_END_OF_LIST) {
1335 if (!zend_hash_index_add_ptr(ht, tag_table->Tag, tag_table->Desc)) {
1336 zend_error(E_CORE_ERROR, "Duplicate tag %x", tag_table->Tag);
1337 }
1338 tag_table++;
1339 }
1340 return ht;
1341 }
1342
exif_tag_ht_dtor(zval * zv)1343 static void exif_tag_ht_dtor(zval *zv)
1344 {
1345 HashTable *ht = Z_PTR_P(zv);
1346 zend_hash_destroy(ht);
1347 free(ht);
1348 }
1349
exif_get_tag_ht(tag_info_type * tag_table)1350 static HashTable *exif_get_tag_ht(tag_info_type *tag_table)
1351 {
1352 HashTable *ht;
1353
1354 if (!EXIF_G(tag_table_cache)) {
1355 EXIF_G(tag_table_cache) = malloc(sizeof(HashTable));
1356 zend_hash_init(EXIF_G(tag_table_cache), 0, NULL, exif_tag_ht_dtor, 1);
1357 }
1358
1359 ht = zend_hash_index_find_ptr(EXIF_G(tag_table_cache), (uintptr_t) tag_table);
1360 if (ht) {
1361 return ht;
1362 }
1363
1364 ht = exif_make_tag_ht(tag_table);
1365 zend_hash_index_add_new_ptr(EXIF_G(tag_table_cache), (uintptr_t) tag_table, ht);
1366 return ht;
1367 }
1368
1369 /* {{{ exif_get_tagname
1370 Get headername for tag_num or NULL if not defined */
exif_get_tagname(int tag_num,tag_table_type tag_table)1371 static char *exif_get_tagname(int tag_num, tag_table_type tag_table)
1372 {
1373 return zend_hash_index_find_ptr(exif_get_tag_ht(tag_table), tag_num);
1374 }
1375 /* }}} */
1376
exif_get_tagname_debug(int tag_num,tag_table_type tag_table)1377 static char *exif_get_tagname_debug(int tag_num, tag_table_type tag_table)
1378 {
1379 char *desc = zend_hash_index_find_ptr(exif_get_tag_ht(tag_table), tag_num);
1380 if (desc) {
1381 return desc;
1382 }
1383 return "UndefinedTag";
1384 }
1385
exif_get_tagname_key(int tag_num,char * buf,size_t buf_size,tag_table_type tag_table)1386 static char *exif_get_tagname_key(int tag_num, char *buf, size_t buf_size, tag_table_type tag_table)
1387 {
1388 char *desc = zend_hash_index_find_ptr(exif_get_tag_ht(tag_table), tag_num);
1389 if (desc) {
1390 return desc;
1391 }
1392 snprintf(buf, buf_size, "UndefinedTag:0x%04X", tag_num);
1393 return buf;
1394 }
1395
1396 /* {{{ exif_char_dump
1397 * Do not use! This is a debug function... */
1398 #ifdef EXIF_DEBUG
exif_char_dump(char * addr,int len,int offset)1399 static char* exif_char_dump(char * addr, int len, int offset)
1400 {
1401 static char buf[4096+1];
1402 static char tmp[20];
1403 int c, i, p=0, n = 5+31;
1404
1405 p += slprintf(buf+p, sizeof(buf)-p, "\nDump Len: %08X (%d)", len, len);
1406 if (len) {
1407 for(i=0; i<len+15 && p+n<=sizeof(buf); i++) {
1408 if (i%16==0) {
1409 p += slprintf(buf+p, sizeof(buf)-p, "\n%08X: ", i+offset);
1410 }
1411 if (i<len) {
1412 c = *((unsigned char *)addr++);
1413 p += slprintf(buf+p, sizeof(buf)-p, "%02X ", c);
1414 tmp[i%16] = c>=32 ? c : '.';
1415 tmp[(i%16)+1] = '\0';
1416 } else {
1417 p += slprintf(buf+p, sizeof(buf)-p, " ");
1418 }
1419 if (i%16==15) {
1420 p += slprintf(buf+p, sizeof(buf)-p, " %s", tmp);
1421 if (i>=len) {
1422 break;
1423 }
1424 }
1425 }
1426 }
1427 buf[sizeof(buf)-1] = '\0';
1428 return buf;
1429 }
1430 #endif
1431 /* }}} */
1432
1433 /* {{{ php_jpg_get16
1434 Get 16 bits motorola order (always) for jpeg header stuff.
1435 */
php_jpg_get16(void * value)1436 static int php_jpg_get16(void *value)
1437 {
1438 return (((uchar *)value)[0] << 8) | ((uchar *)value)[1];
1439 }
1440 /* }}} */
1441
1442 /* {{{ php_ifd_get16u
1443 * Convert a 16 bit unsigned value from file's native byte order */
php_ifd_get16u(void * value,int motorola_intel)1444 static int php_ifd_get16u(void *value, int motorola_intel)
1445 {
1446 if (motorola_intel) {
1447 return (((uchar *)value)[0] << 8) | ((uchar *)value)[1];
1448 } else {
1449 return (((uchar *)value)[1] << 8) | ((uchar *)value)[0];
1450 }
1451 }
1452 /* }}} */
1453
1454 /* {{{ php_ifd_get16s
1455 * Convert a 16 bit signed value from file's native byte order */
php_ifd_get16s(void * value,int motorola_intel)1456 static signed short php_ifd_get16s(void *value, int motorola_intel)
1457 {
1458 return (signed short)php_ifd_get16u(value, motorola_intel);
1459 }
1460 /* }}} */
1461
1462 /* {{{ php_ifd_get32u
1463 * Convert a 32 bit unsigned value from file's native byte order */
php_ifd_get32u(void * void_value,int motorola_intel)1464 static unsigned php_ifd_get32u(void *void_value, int motorola_intel)
1465 {
1466 uchar *value = (uchar *) void_value;
1467 if (motorola_intel) {
1468 return ((unsigned)value[0] << 24)
1469 | ((unsigned)value[1] << 16)
1470 | ((unsigned)value[2] << 8 )
1471 | ((unsigned)value[3] );
1472 } else {
1473 return ((unsigned)value[3] << 24)
1474 | ((unsigned)value[2] << 16)
1475 | ((unsigned)value[1] << 8 )
1476 | ((unsigned)value[0] );
1477 }
1478 }
1479 /* }}} */
1480
1481 /* {{{ php_ifd_get64u
1482 * Convert a 64 bit unsigned value from file's native byte order */
php_ifd_get64u(void * void_value,int motorola_intel)1483 static uint64_t php_ifd_get64u(void *void_value, int motorola_intel)
1484 {
1485 uchar *value = (uchar *) void_value;
1486 if (motorola_intel) {
1487 return ((uint64_t)value[0] << 56)
1488 | ((uint64_t)value[1] << 48)
1489 | ((uint64_t)value[2] << 40)
1490 | ((uint64_t)value[3] << 32)
1491 | ((uint64_t)value[4] << 24)
1492 | ((uint64_t)value[5] << 16)
1493 | ((uint64_t)value[6] << 8 )
1494 | ((uint64_t)value[7] );
1495 } else {
1496 return ((uint64_t)value[7] << 56)
1497 | ((uint64_t)value[6] << 48)
1498 | ((uint64_t)value[5] << 40)
1499 | ((uint64_t)value[4] << 32)
1500 | ((uint64_t)value[3] << 24)
1501 | ((uint64_t)value[2] << 16)
1502 | ((uint64_t)value[1] << 8 )
1503 | ((uint64_t)value[0] );
1504 }
1505 }
1506 /* }}} */
1507
1508 /* {{{ php_ifd_get32u
1509 * Convert a 32 bit signed value from file's native byte order */
php_ifd_get32s(void * value,int motorola_intel)1510 static unsigned php_ifd_get32s(void *value, int motorola_intel)
1511 {
1512 return (int) php_ifd_get32u(value, motorola_intel);
1513 }
1514 /* }}} */
1515
1516 /* {{{ php_ifd_set16u
1517 * Write 16 bit unsigned value to data */
php_ifd_set16u(char * data,unsigned int value,int motorola_intel)1518 static void php_ifd_set16u(char *data, unsigned int value, int motorola_intel)
1519 {
1520 if (motorola_intel) {
1521 data[0] = (value & 0xFF00) >> 8;
1522 data[1] = (value & 0x00FF);
1523 } else {
1524 data[1] = (value & 0xFF00) >> 8;
1525 data[0] = (value & 0x00FF);
1526 }
1527 }
1528 /* }}} */
1529
1530 /* {{{ php_ifd_set32u
1531 * Convert a 32 bit unsigned value from file's native byte order */
php_ifd_set32u(char * data,size_t value,int motorola_intel)1532 static void php_ifd_set32u(char *data, size_t value, int motorola_intel)
1533 {
1534 if (motorola_intel) {
1535 data[0] = (value & 0xFF000000) >> 24;
1536 data[1] = (char) ((value & 0x00FF0000) >> 16);
1537 data[2] = (value & 0x0000FF00) >> 8;
1538 data[3] = (value & 0x000000FF);
1539 } else {
1540 data[3] = (value & 0xFF000000) >> 24;
1541 data[2] = (char) ((value & 0x00FF0000) >> 16);
1542 data[1] = (value & 0x0000FF00) >> 8;
1543 data[0] = (value & 0x000000FF);
1544 }
1545 }
1546 /* }}} */
1547
php_ifd_get_float(char * data)1548 static float php_ifd_get_float(char *data) {
1549 union { uint32_t i; float f; } u;
1550 u.i = php_ifd_get32u(data, 0);
1551 return u.f;
1552 }
1553
php_ifd_get_double(char * data)1554 static double php_ifd_get_double(char *data) {
1555 union { uint64_t i; double f; } u;
1556 u.i = php_ifd_get64u(data, 0);
1557 return u.f;
1558 }
1559
1560 #ifdef EXIF_DEBUG
exif_dump_data(int * dump_free,int format,int components,int motorola_intel,char * value_ptr)1561 char * exif_dump_data(int *dump_free, int format, int components, int motorola_intel, char *value_ptr) /* {{{ */
1562 {
1563 char *dump;
1564 int len;
1565
1566 *dump_free = 0;
1567 if (format == TAG_FMT_STRING) {
1568 return value_ptr ? value_ptr : "<no data>";
1569 }
1570 if (format == TAG_FMT_UNDEFINED) {
1571 return "<undefined>";
1572 }
1573 if (format == TAG_FMT_IFD) {
1574 return "";
1575 }
1576 if (format == TAG_FMT_SINGLE || format == TAG_FMT_DOUBLE) {
1577 return "<not implemented>";
1578 }
1579 *dump_free = 1;
1580 if (components > 1) {
1581 len = spprintf(&dump, 0, "(%d) {", components);
1582 } else {
1583 len = spprintf(&dump, 0, "{");
1584 }
1585 while(components > 0) {
1586 switch(format) {
1587 case TAG_FMT_BYTE:
1588 case TAG_FMT_UNDEFINED:
1589 case TAG_FMT_STRING:
1590 case TAG_FMT_SBYTE:
1591 dump = erealloc(dump, len + 4 + 1);
1592 snprintf(dump + len, 4 + 1, "0x%02X", *value_ptr);
1593 len += 4;
1594 value_ptr++;
1595 break;
1596 case TAG_FMT_USHORT:
1597 case TAG_FMT_SSHORT:
1598 dump = erealloc(dump, len + 6 + 1);
1599 snprintf(dump + len, 6 + 1, "0x%04X", php_ifd_get16s(value_ptr, motorola_intel));
1600 len += 6;
1601 value_ptr += 2;
1602 break;
1603 case TAG_FMT_ULONG:
1604 case TAG_FMT_SLONG:
1605 dump = erealloc(dump, len + 6 + 1);
1606 snprintf(dump + len, 6 + 1, "0x%04X", php_ifd_get32s(value_ptr, motorola_intel));
1607 len += 6;
1608 value_ptr += 4;
1609 break;
1610 case TAG_FMT_URATIONAL:
1611 case TAG_FMT_SRATIONAL:
1612 dump = erealloc(dump, len + 13 + 1);
1613 snprintf(dump + len, 13 + 1, "0x%04X/0x%04X", php_ifd_get32s(value_ptr, motorola_intel), php_ifd_get32s(value_ptr+4, motorola_intel));
1614 len += 13;
1615 value_ptr += 8;
1616 break;
1617 }
1618 if (components > 0) {
1619 dump = erealloc(dump, len + 2 + 1);
1620 snprintf(dump + len, 2 + 1, ", ");
1621 len += 2;
1622 components--;
1623 } else{
1624 break;
1625 }
1626 }
1627 dump = erealloc(dump, len + 1 + 1);
1628 snprintf(dump + len, 1 + 1, "}");
1629 return dump;
1630 }
1631 /* }}} */
1632 #endif
1633
1634 /* {{{ exif_convert_any_format
1635 * Evaluate number, be it int, rational, or float from directory. */
exif_convert_any_format(void * value,int format,int motorola_intel)1636 static double exif_convert_any_format(void *value, int format, int motorola_intel)
1637 {
1638 int s_den;
1639 unsigned u_den;
1640
1641 switch(format) {
1642 case TAG_FMT_SBYTE: return *(signed char *)value;
1643 case TAG_FMT_BYTE: return *(uchar *)value;
1644
1645 case TAG_FMT_USHORT: return php_ifd_get16u(value, motorola_intel);
1646 case TAG_FMT_ULONG: return php_ifd_get32u(value, motorola_intel);
1647
1648 case TAG_FMT_URATIONAL:
1649 u_den = php_ifd_get32u(4+(char *)value, motorola_intel);
1650 if (u_den == 0) {
1651 return 0;
1652 } else {
1653 return (double)php_ifd_get32u(value, motorola_intel) / u_den;
1654 }
1655
1656 case TAG_FMT_SRATIONAL:
1657 s_den = php_ifd_get32s(4+(char *)value, motorola_intel);
1658 if (s_den == 0) {
1659 return 0;
1660 } else {
1661 return (double)php_ifd_get32s(value, motorola_intel) / s_den;
1662 }
1663
1664 case TAG_FMT_SSHORT: return (signed short)php_ifd_get16u(value, motorola_intel);
1665 case TAG_FMT_SLONG: return php_ifd_get32s(value, motorola_intel);
1666
1667 /* Not sure if this is correct (never seen float used in Exif format) */
1668 case TAG_FMT_SINGLE:
1669 #ifdef EXIF_DEBUG
1670 php_error_docref(NULL, E_NOTICE, "Found value of type single");
1671 #endif
1672 return (double) php_ifd_get_float(value);
1673 case TAG_FMT_DOUBLE:
1674 #ifdef EXIF_DEBUG
1675 php_error_docref(NULL, E_NOTICE, "Found value of type double");
1676 #endif
1677 return php_ifd_get_double(value);
1678 }
1679 return 0;
1680 }
1681 /* }}} */
1682
1683 /* {{{ exif_rewrite_tag_format_to_unsigned
1684 * Rewrite format tag so that it specifies an unsigned type for a tag */
exif_rewrite_tag_format_to_unsigned(int format)1685 static int exif_rewrite_tag_format_to_unsigned(int format)
1686 {
1687 switch(format) {
1688 case TAG_FMT_SBYTE: return TAG_FMT_BYTE;
1689 case TAG_FMT_SRATIONAL: return TAG_FMT_URATIONAL;
1690 case TAG_FMT_SSHORT: return TAG_FMT_USHORT;
1691 case TAG_FMT_SLONG: return TAG_FMT_ULONG;
1692 }
1693 return format;
1694 }
1695 /* }}} */
1696
1697 /* Use saturation for out of bounds values to avoid UB */
float_to_size_t(float x)1698 static size_t float_to_size_t(float x) {
1699 if (x < 0.0f || zend_isnan(x)) {
1700 return 0;
1701 } else if (x > (float) SIZE_MAX) {
1702 return SIZE_MAX;
1703 } else {
1704 return (size_t) x;
1705 }
1706 }
1707
double_to_size_t(double x)1708 static size_t double_to_size_t(double x) {
1709 if (x < 0.0 || zend_isnan(x)) {
1710 return 0;
1711 } else if (x > (double) SIZE_MAX) {
1712 return SIZE_MAX;
1713 } else {
1714 return (size_t) x;
1715 }
1716 }
1717
1718 /* {{{ exif_convert_any_to_int
1719 * Evaluate number, be it int, rational, or float from directory. */
exif_convert_any_to_int(void * value,int format,int motorola_intel)1720 static size_t exif_convert_any_to_int(void *value, int format, int motorola_intel)
1721 {
1722 switch (format) {
1723 case TAG_FMT_SBYTE: return *(signed char *)value;
1724 case TAG_FMT_BYTE: return *(uchar *)value;
1725
1726 case TAG_FMT_USHORT: return php_ifd_get16u(value, motorola_intel);
1727 case TAG_FMT_ULONG: return php_ifd_get32u(value, motorola_intel);
1728
1729 case TAG_FMT_URATIONAL: {
1730 unsigned u_den = php_ifd_get32u(4+(char *)value, motorola_intel);
1731 if (u_den == 0) {
1732 return 0;
1733 } else {
1734 return php_ifd_get32u(value, motorola_intel) / u_den;
1735 }
1736 }
1737
1738 case TAG_FMT_SRATIONAL: {
1739 int s_num = php_ifd_get32s(value, motorola_intel);
1740 int s_den = php_ifd_get32s(4+(char *)value, motorola_intel);
1741 if (s_den == 0) {
1742 return 0;
1743 } else if (s_num == INT_MIN && s_den == -1) {
1744 return INT_MAX;
1745 } else {
1746 return s_num / s_den;
1747 }
1748 }
1749
1750 case TAG_FMT_SSHORT: return php_ifd_get16u(value, motorola_intel);
1751 case TAG_FMT_SLONG: return php_ifd_get32s(value, motorola_intel);
1752
1753 /* Not sure if this is correct (never seen float used in Exif format) */
1754 case TAG_FMT_SINGLE:
1755 #ifdef EXIF_DEBUG
1756 php_error_docref(NULL, E_NOTICE, "Found value of type single");
1757 #endif
1758 return float_to_size_t(php_ifd_get_float(value));
1759 case TAG_FMT_DOUBLE:
1760 #ifdef EXIF_DEBUG
1761 php_error_docref(NULL, E_NOTICE, "Found value of type double");
1762 #endif
1763 return double_to_size_t(php_ifd_get_double(value));
1764 }
1765 return 0;
1766 }
1767 /* }}} */
1768
1769 /* {{{ struct image_info_value, image_info_list */
1770 #ifndef WORD
1771 #define WORD unsigned short
1772 #endif
1773 #ifndef DWORD
1774 #define DWORD unsigned int
1775 #endif
1776
1777 typedef struct {
1778 int num;
1779 int den;
1780 } signed_rational;
1781
1782 typedef struct {
1783 unsigned int num;
1784 unsigned int den;
1785 } unsigned_rational;
1786
1787 typedef union _image_info_value {
1788 char *s;
1789 unsigned u;
1790 int i;
1791 float f;
1792 double d;
1793 signed_rational sr;
1794 unsigned_rational ur;
1795 union _image_info_value *list;
1796 } image_info_value;
1797
1798 typedef struct {
1799 WORD tag;
1800 WORD format;
1801 DWORD length;
1802 DWORD dummy; /* value ptr of tiff directory entry */
1803 char *name;
1804 image_info_value value;
1805 } image_info_data;
1806
1807 typedef struct {
1808 int count;
1809 int alloc_count;
1810 image_info_data *list;
1811 } image_info_list;
1812 /* }}} */
1813
1814 /* {{{ exif_get_sectionname
1815 Returns the name of a section
1816 */
1817 #define SECTION_FILE 0
1818 #define SECTION_COMPUTED 1
1819 #define SECTION_ANY_TAG 2
1820 #define SECTION_IFD0 3
1821 #define SECTION_THUMBNAIL 4
1822 #define SECTION_COMMENT 5
1823 #define SECTION_APP0 6
1824 #define SECTION_EXIF 7
1825 #define SECTION_FPIX 8
1826 #define SECTION_GPS 9
1827 #define SECTION_INTEROP 10
1828 #define SECTION_APP12 11
1829 #define SECTION_WINXP 12
1830 #define SECTION_MAKERNOTE 13
1831 #define SECTION_COUNT 14
1832
1833 #define FOUND_FILE (1<<SECTION_FILE)
1834 #define FOUND_COMPUTED (1<<SECTION_COMPUTED)
1835 #define FOUND_ANY_TAG (1<<SECTION_ANY_TAG)
1836 #define FOUND_IFD0 (1<<SECTION_IFD0)
1837 #define FOUND_THUMBNAIL (1<<SECTION_THUMBNAIL)
1838 #define FOUND_COMMENT (1<<SECTION_COMMENT)
1839 #define FOUND_APP0 (1<<SECTION_APP0)
1840 #define FOUND_EXIF (1<<SECTION_EXIF)
1841 #define FOUND_FPIX (1<<SECTION_FPIX)
1842 #define FOUND_GPS (1<<SECTION_GPS)
1843 #define FOUND_INTEROP (1<<SECTION_INTEROP)
1844 #define FOUND_APP12 (1<<SECTION_APP12)
1845 #define FOUND_WINXP (1<<SECTION_WINXP)
1846 #define FOUND_MAKERNOTE (1<<SECTION_MAKERNOTE)
1847
exif_get_sectionname(int section)1848 static char *exif_get_sectionname(int section)
1849 {
1850 switch(section) {
1851 case SECTION_FILE: return "FILE";
1852 case SECTION_COMPUTED: return "COMPUTED";
1853 case SECTION_ANY_TAG: return "ANY_TAG";
1854 case SECTION_IFD0: return "IFD0";
1855 case SECTION_THUMBNAIL: return "THUMBNAIL";
1856 case SECTION_COMMENT: return "COMMENT";
1857 case SECTION_APP0: return "APP0";
1858 case SECTION_EXIF: return "EXIF";
1859 case SECTION_FPIX: return "FPIX";
1860 case SECTION_GPS: return "GPS";
1861 case SECTION_INTEROP: return "INTEROP";
1862 case SECTION_APP12: return "APP12";
1863 case SECTION_WINXP: return "WINXP";
1864 case SECTION_MAKERNOTE: return "MAKERNOTE";
1865 }
1866 return "";
1867 }
1868
exif_get_tag_table(int section)1869 static tag_table_type exif_get_tag_table(int section)
1870 {
1871 switch(section) {
1872 case SECTION_FILE: return &tag_table_IFD[0];
1873 case SECTION_COMPUTED: return &tag_table_IFD[0];
1874 case SECTION_ANY_TAG: return &tag_table_IFD[0];
1875 case SECTION_IFD0: return &tag_table_IFD[0];
1876 case SECTION_THUMBNAIL: return &tag_table_IFD[0];
1877 case SECTION_COMMENT: return &tag_table_IFD[0];
1878 case SECTION_APP0: return &tag_table_IFD[0];
1879 case SECTION_EXIF: return &tag_table_IFD[0];
1880 case SECTION_FPIX: return &tag_table_IFD[0];
1881 case SECTION_GPS: return &tag_table_GPS[0];
1882 case SECTION_INTEROP: return &tag_table_IOP[0];
1883 case SECTION_APP12: return &tag_table_IFD[0];
1884 case SECTION_WINXP: return &tag_table_IFD[0];
1885 }
1886 return &tag_table_IFD[0];
1887 }
1888 /* }}} */
1889
1890 /* {{{ exif_get_sectionlist
1891 Return list of sectionnames specified by sectionlist. Return value must be freed
1892 */
exif_get_sectionlist(int sectionlist)1893 static char *exif_get_sectionlist(int sectionlist)
1894 {
1895 int i, len, ml = 0;
1896 char *sections;
1897
1898 for(i=0; i<SECTION_COUNT; i++) {
1899 ml += strlen(exif_get_sectionname(i))+2;
1900 }
1901 sections = safe_emalloc(ml, 1, 1);
1902 sections[0] = '\0';
1903 len = 0;
1904 for(i=0; i<SECTION_COUNT; i++) {
1905 if (sectionlist&(1<<i)) {
1906 snprintf(sections+len, ml-len, "%s, ", exif_get_sectionname(i));
1907 len = strlen(sections);
1908 }
1909 }
1910 if (len>2)
1911 sections[len-2] = '\0';
1912 return sections;
1913 }
1914 /* }}} */
1915
1916 /* {{{ struct image_info_type
1917 This structure stores Exif header image elements in a simple manner
1918 Used to store camera data as extracted from the various ways that it can be
1919 stored in a nexif header
1920 */
1921
1922 typedef struct {
1923 int type;
1924 size_t size;
1925 uchar *data;
1926 } file_section;
1927
1928 typedef struct {
1929 int count;
1930 int alloc_count;
1931 file_section *list;
1932 } file_section_list;
1933
1934 typedef struct {
1935 image_filetype filetype;
1936 size_t width, height;
1937 size_t size;
1938 size_t offset;
1939 char *data;
1940 } thumbnail_data;
1941
1942 typedef struct {
1943 char *value;
1944 size_t size;
1945 int tag;
1946 } xp_field_type;
1947
1948 typedef struct {
1949 int count;
1950 xp_field_type *list;
1951 } xp_field_list;
1952
1953 /* This structure is used to store a section of a Jpeg file. */
1954 typedef struct {
1955 php_stream *infile;
1956 char *FileName;
1957 time_t FileDateTime;
1958 size_t FileSize;
1959 image_filetype FileType;
1960 int Height, Width;
1961 int IsColor;
1962
1963 char *make;
1964 char *model;
1965
1966 float ApertureFNumber;
1967 float ExposureTime;
1968 double FocalplaneUnits;
1969 float CCDWidth;
1970 double FocalplaneXRes;
1971 size_t ExifImageWidth;
1972 float FocalLength;
1973 float Distance;
1974
1975 int motorola_intel; /* 1 Motorola; 0 Intel */
1976
1977 char *UserComment;
1978 int UserCommentLength;
1979 char *UserCommentEncoding;
1980 char *encode_unicode;
1981 char *decode_unicode_be;
1982 char *decode_unicode_le;
1983 char *encode_jis;
1984 char *decode_jis_be;
1985 char *decode_jis_le;
1986 char *Copyright;/* EXIF standard defines Copyright as "<Photographer> [ '\0' <Editor> ] ['\0']" */
1987 char *CopyrightPhotographer;
1988 char *CopyrightEditor;
1989
1990 xp_field_list xp_fields;
1991
1992 thumbnail_data Thumbnail;
1993 /* other */
1994 int sections_found; /* FOUND_<marker> */
1995 image_info_list info_list[SECTION_COUNT];
1996 /* for parsing */
1997 int read_thumbnail;
1998 int read_all;
1999 int ifd_nesting_level;
2000 int ifd_count;
2001 int num_errors;
2002 /* internal */
2003 file_section_list file;
2004 } image_info_type;
2005 /* }}} */
2006
2007 // EXIF_DEBUG can produce lots of messages
2008 #ifndef EXIF_DEBUG
2009 #define EXIF_MAX_ERRORS 10
2010 #else
2011 #define EXIF_MAX_ERRORS 100000
2012 #endif
2013
2014 /* {{{ exif_error_docref */
exif_error_docref(const char * docref EXIFERR_DC,image_info_type * ImageInfo,int type,const char * format,...)2015 static void exif_error_docref(const char *docref EXIFERR_DC, image_info_type *ImageInfo, int type, const char *format, ...)
2016 {
2017 va_list args;
2018
2019 if (ImageInfo) {
2020 if (++ImageInfo->num_errors > EXIF_MAX_ERRORS) {
2021 if (ImageInfo->num_errors == EXIF_MAX_ERRORS+1) {
2022 php_error_docref(docref, type,
2023 "Further exif parsing errors have been suppressed");
2024 }
2025 return;
2026 }
2027 }
2028
2029 va_start(args, format);
2030 #ifdef EXIF_DEBUG
2031 {
2032 char *buf;
2033
2034 spprintf(&buf, 0, "%s(%ld): %s", _file, _line, format);
2035 php_verror(docref, ImageInfo && ImageInfo->FileName ? ImageInfo->FileName:"", type, buf, args);
2036 efree(buf);
2037 }
2038 #else
2039 php_verror(docref, ImageInfo && ImageInfo->FileName ? ImageInfo->FileName:"", type, format, args);
2040 #endif
2041 va_end(args);
2042 }
2043 /* }}} */
2044
2045 /* {{{ jpeg_sof_info */
2046 typedef struct {
2047 int bits_per_sample;
2048 size_t width;
2049 size_t height;
2050 int num_components;
2051 } jpeg_sof_info;
2052 /* }}} */
2053
2054 /* Base address for offset references, together with valid memory range.
2055 * The valid range does not necessarily include the offset base. */
2056 typedef struct {
2057 char *offset_base;
2058 char *valid_start; /* inclusive */
2059 char *valid_end; /* exclusive */
2060 } exif_offset_info;
2061
ptr_offset_overflows(char * ptr,size_t offset)2062 static zend_always_inline bool ptr_offset_overflows(char *ptr, size_t offset) {
2063 return UINTPTR_MAX - (uintptr_t) ptr < offset;
2064 }
2065
exif_offset_info_init(exif_offset_info * info,char * offset_base,char * valid_start,size_t valid_length)2066 static inline void exif_offset_info_init(
2067 exif_offset_info *info, char *offset_base, char *valid_start, size_t valid_length) {
2068 ZEND_ASSERT(!ptr_offset_overflows(valid_start, valid_length));
2069 #ifdef __SANITIZE_ADDRESS__
2070 ZEND_ASSERT(!__asan_region_is_poisoned(valid_start, valid_length));
2071 #endif
2072 info->offset_base = offset_base;
2073 info->valid_start = valid_start;
2074 info->valid_end = valid_start + valid_length;
2075 }
2076
2077 /* Try to get a pointer at offset_base+offset with length dereferenceable bytes. */
exif_offset_info_try_get(const exif_offset_info * info,size_t offset,size_t length)2078 static inline char *exif_offset_info_try_get(
2079 const exif_offset_info *info, size_t offset, size_t length) {
2080 char *start, *end;
2081 if (ptr_offset_overflows(info->offset_base, offset)) {
2082 return NULL;
2083 }
2084
2085 start = info->offset_base + offset;
2086 if (ptr_offset_overflows(start, length)) {
2087 return NULL;
2088 }
2089
2090 end = start + length;
2091 if (start < info->valid_start || end > info->valid_end) {
2092 return NULL;
2093 }
2094
2095 return start;
2096 }
2097
exif_offset_info_contains(const exif_offset_info * info,char * start,size_t length)2098 static inline bool exif_offset_info_contains(
2099 const exif_offset_info *info, char *start, size_t length) {
2100 char *end;
2101 if (ptr_offset_overflows(start, length)) {
2102 return 0;
2103 }
2104
2105 /* start and valid_start are both inclusive, end and valid_end are both exclusive,
2106 * so we use >= and <= to do the checks, respectively. */
2107 end = start + length;
2108 return start >= info->valid_start && end <= info->valid_end;
2109 }
2110
2111 #ifdef EXIF_DEBUG
exif_offset_info_length(const exif_offset_info * info)2112 static inline int exif_offset_info_length(const exif_offset_info *info)
2113 {
2114 return info->valid_end - info->valid_start;
2115 }
2116 #endif
2117
2118 /* {{{ exif_file_sections_add
2119 Add a file_section to image_info
2120 returns the used block or -1. if size>0 and data == NULL buffer of size is allocated
2121 */
exif_file_sections_add(image_info_type * ImageInfo,int type,size_t size,uchar * data)2122 static int exif_file_sections_add(image_info_type *ImageInfo, int type, size_t size, uchar *data)
2123 {
2124 int count = ImageInfo->file.count;
2125 if (count == ImageInfo->file.alloc_count) {
2126 int new_alloc_count = ImageInfo->file.alloc_count ? ImageInfo->file.alloc_count * 2 : 1;
2127 ImageInfo->file.list = safe_erealloc(
2128 ImageInfo->file.list, new_alloc_count, sizeof(file_section), 0);
2129 ImageInfo->file.alloc_count = new_alloc_count;
2130 }
2131
2132 ImageInfo->file.list[count].type = 0xFFFF;
2133 ImageInfo->file.list[count].data = NULL;
2134 ImageInfo->file.list[count].size = 0;
2135 ImageInfo->file.count = count+1;
2136 if (!size) {
2137 data = NULL;
2138 } else if (data == NULL) {
2139 data = safe_emalloc(size, 1, 0);
2140 }
2141 ImageInfo->file.list[count].type = type;
2142 ImageInfo->file.list[count].data = data;
2143 ImageInfo->file.list[count].size = size;
2144 return count;
2145 }
2146 /* }}} */
2147
2148 /* {{{ exif_file_sections_realloc
2149 Reallocate a file section returns 0 on success and -1 on failure
2150 */
exif_file_sections_realloc(image_info_type * ImageInfo,int section_index,size_t size)2151 static int exif_file_sections_realloc(image_info_type *ImageInfo, int section_index, size_t size)
2152 {
2153 void *tmp;
2154
2155 /* This is not a malloc/realloc check. It is a plausibility check for the
2156 * function parameters (requirements engineering).
2157 */
2158 if (section_index >= ImageInfo->file.count) {
2159 EXIF_ERRLOG_FSREALLOC(ImageInfo)
2160 return -1;
2161 }
2162 tmp = safe_erealloc(ImageInfo->file.list[section_index].data, 1, size, 0);
2163 ImageInfo->file.list[section_index].data = tmp;
2164 ImageInfo->file.list[section_index].size = size;
2165 return 0;
2166 }
2167 /* }}} */
2168
2169 /* {{{ exif_file_section_free
2170 Discard all file_sections in ImageInfo
2171 */
exif_file_sections_free(image_info_type * ImageInfo)2172 static bool exif_file_sections_free(image_info_type *ImageInfo)
2173 {
2174 int i;
2175
2176 if (ImageInfo->file.count) {
2177 for (i=0; i<ImageInfo->file.count; i++) {
2178 EFREE_IF(ImageInfo->file.list[i].data);
2179 }
2180 }
2181 EFREE_IF(ImageInfo->file.list);
2182 ImageInfo->file.count = 0;
2183 return true;
2184 }
2185 /* }}} */
2186
exif_alloc_image_info_data(image_info_list * info_list)2187 static image_info_data *exif_alloc_image_info_data(image_info_list *info_list) {
2188 if (info_list->count == info_list->alloc_count) {
2189 int new_alloc_count = info_list->alloc_count ? info_list->alloc_count * 2 : 1;
2190 info_list->list = safe_erealloc(
2191 info_list->list, new_alloc_count, sizeof(image_info_data), 0);
2192 info_list->alloc_count = new_alloc_count;
2193 }
2194 return &info_list->list[info_list->count++];
2195 }
2196
2197 /* {{{ exif_iif_add_value
2198 Add a value to image_info
2199 */
exif_iif_add_value(image_info_type * image_info,int section_index,char * name,int tag,int format,int length,void * value,size_t value_len,int motorola_intel)2200 static void exif_iif_add_value(image_info_type *image_info, int section_index, char *name, int tag, int format, int length, void* value, size_t value_len, int motorola_intel)
2201 {
2202 size_t idex;
2203 void *vptr, *vptr_end;
2204 image_info_value *info_value;
2205 image_info_data *info_data;
2206
2207 if (length < 0) {
2208 return;
2209 }
2210
2211 info_data = exif_alloc_image_info_data(&image_info->info_list[section_index]);
2212 memset(info_data, 0, sizeof(image_info_data));
2213 info_data->tag = tag;
2214 info_data->format = format;
2215 info_data->length = length;
2216 info_data->name = estrdup(name);
2217 info_value = &info_data->value;
2218
2219 switch (format) {
2220 case TAG_FMT_STRING:
2221 if (length > value_len) {
2222 exif_error_docref("exif_iif_add_value" EXIFERR_CC, image_info, E_WARNING, "length > value_len: %d > %zu", length, value_len);
2223 value = NULL;
2224 }
2225 if (value) {
2226 length = (int)php_strnlen(value, length);
2227 info_value->s = estrndup(value, length);
2228 info_data->length = length;
2229 } else {
2230 info_data->length = 0;
2231 info_value->s = estrdup("");
2232 }
2233 break;
2234
2235 default:
2236 /* Standard says more types possible but skip them...
2237 * but allow users to handle data if they know how to
2238 * So not return but use type UNDEFINED
2239 * return;
2240 */
2241 info_data->tag = TAG_FMT_UNDEFINED;/* otherwise not freed from memory */
2242 ZEND_FALLTHROUGH;
2243 case TAG_FMT_SBYTE:
2244 case TAG_FMT_BYTE:
2245 /* in contrast to strings bytes do not need to allocate buffer for NULL if length==0 */
2246 if (!length) {
2247 break;
2248 }
2249 ZEND_FALLTHROUGH;
2250 case TAG_FMT_UNDEFINED:
2251 if (length > value_len) {
2252 exif_error_docref("exif_iif_add_value" EXIFERR_CC, image_info, E_WARNING, "length > value_len: %d > %zu", length, value_len);
2253 value = NULL;
2254 }
2255 if (value) {
2256 if (tag == TAG_MAKER_NOTE) {
2257 length = (int) php_strnlen(value, length);
2258 }
2259
2260 /* do not recompute length here */
2261 info_value->s = estrndup(value, length);
2262 info_data->length = length;
2263 } else {
2264 info_data->length = 0;
2265 info_value->s = estrdup("");
2266 }
2267 break;
2268
2269 case TAG_FMT_USHORT:
2270 case TAG_FMT_ULONG:
2271 case TAG_FMT_URATIONAL:
2272 case TAG_FMT_SSHORT:
2273 case TAG_FMT_SLONG:
2274 case TAG_FMT_SRATIONAL:
2275 case TAG_FMT_SINGLE:
2276 case TAG_FMT_DOUBLE:
2277 if (length==0) {
2278 break;
2279 } else
2280 if (length>1) {
2281 info_value->list = safe_emalloc(length, sizeof(image_info_value), 0);
2282 } else {
2283 info_value = &info_data->value;
2284 }
2285 vptr_end = (char *) value + value_len;
2286 for (idex=0,vptr=value; idex<(size_t)length; idex++,vptr=(char *) vptr + php_tiff_bytes_per_format[format]) {
2287 if ((char *) vptr_end - (char *) vptr < php_tiff_bytes_per_format[format]) {
2288 exif_error_docref("exif_iif_add_value" EXIFERR_CC, image_info, E_WARNING, "Value too short");
2289 break;
2290 }
2291 if (length>1) {
2292 info_value = &info_data->value.list[idex];
2293 }
2294 switch (format) {
2295 case TAG_FMT_USHORT:
2296 info_value->u = php_ifd_get16u(vptr, motorola_intel);
2297 break;
2298
2299 case TAG_FMT_ULONG:
2300 info_value->u = php_ifd_get32u(vptr, motorola_intel);
2301 break;
2302
2303 case TAG_FMT_URATIONAL:
2304 info_value->ur.num = php_ifd_get32u(vptr, motorola_intel);
2305 info_value->ur.den = php_ifd_get32u(4+(char *)vptr, motorola_intel);
2306 break;
2307
2308 case TAG_FMT_SSHORT:
2309 info_value->i = php_ifd_get16s(vptr, motorola_intel);
2310 break;
2311
2312 case TAG_FMT_SLONG:
2313 info_value->i = php_ifd_get32s(vptr, motorola_intel);
2314 break;
2315
2316 case TAG_FMT_SRATIONAL:
2317 info_value->sr.num = php_ifd_get32u(vptr, motorola_intel);
2318 info_value->sr.den = php_ifd_get32u(4+(char *)vptr, motorola_intel);
2319 break;
2320
2321 case TAG_FMT_SINGLE:
2322 #ifdef EXIF_DEBUG
2323 php_error_docref(NULL, E_WARNING, "Found value of type single");
2324 #endif
2325 info_value->f = php_ifd_get_float(value);
2326 break;
2327 case TAG_FMT_DOUBLE:
2328 #ifdef EXIF_DEBUG
2329 php_error_docref(NULL, E_WARNING, "Found value of type double");
2330 #endif
2331 info_value->d = php_ifd_get_double(value);
2332 break;
2333 }
2334 }
2335 }
2336 image_info->sections_found |= 1<<section_index;
2337 }
2338 /* }}} */
2339
2340 /* {{{ exif_iif_add_tag
2341 Add a tag from IFD to image_info
2342 */
exif_iif_add_tag(image_info_type * image_info,int section_index,char * name,int tag,int format,size_t length,void * value,size_t value_len)2343 static void exif_iif_add_tag(image_info_type *image_info, int section_index, char *name, int tag, int format, size_t length, void* value, size_t value_len)
2344 {
2345 exif_iif_add_value(image_info, section_index, name, tag, format, (int)length, value, value_len, image_info->motorola_intel);
2346 }
2347 /* }}} */
2348
2349 /* {{{ exif_iif_add_int
2350 Add an int value to image_info
2351 */
exif_iif_add_int(image_info_type * image_info,int section_index,char * name,int value)2352 static void exif_iif_add_int(image_info_type *image_info, int section_index, char *name, int value)
2353 {
2354 image_info_data *info_data = exif_alloc_image_info_data(&image_info->info_list[section_index]);
2355 info_data->tag = TAG_NONE;
2356 info_data->format = TAG_FMT_SLONG;
2357 info_data->length = 1;
2358 info_data->name = estrdup(name);
2359 info_data->value.i = value;
2360 image_info->sections_found |= 1<<section_index;
2361 }
2362 /* }}} */
2363
2364 /* {{{ exif_iif_add_str
2365 Add a string value to image_info MUST BE NUL TERMINATED
2366 */
exif_iif_add_str(image_info_type * image_info,int section_index,char * name,char * value)2367 static void exif_iif_add_str(image_info_type *image_info, int section_index, char *name, char *value)
2368 {
2369 if (value) {
2370 image_info_data *info_data =
2371 exif_alloc_image_info_data(&image_info->info_list[section_index]);
2372 info_data->tag = TAG_NONE;
2373 info_data->format = TAG_FMT_STRING;
2374 info_data->length = 1;
2375 info_data->name = estrdup(name);
2376 info_data->value.s = estrdup(value);
2377 image_info->sections_found |= 1<<section_index;
2378 }
2379 }
2380 /* }}} */
2381
2382 /* {{{ exif_iif_add_fmt
2383 Add a format string value to image_info MUST BE NUL TERMINATED
2384 */
exif_iif_add_fmt(image_info_type * image_info,int section_index,char * name,char * value,...)2385 static void exif_iif_add_fmt(image_info_type *image_info, int section_index, char *name, char *value, ...)
2386 {
2387 char *tmp;
2388 va_list arglist;
2389
2390 va_start(arglist, value);
2391 if (value) {
2392 vspprintf(&tmp, 0, value, arglist);
2393 exif_iif_add_str(image_info, section_index, name, tmp);
2394 efree(tmp);
2395 }
2396 va_end(arglist);
2397 }
2398 /* }}} */
2399
2400 /* {{{ exif_iif_add_str
2401 Add a string value to image_info MUST BE NUL TERMINATED
2402 */
exif_iif_add_buffer(image_info_type * image_info,int section_index,char * name,int length,char * value)2403 static void exif_iif_add_buffer(image_info_type *image_info, int section_index, char *name, int length, char *value)
2404 {
2405 if (value) {
2406 image_info_data *info_data =
2407 exif_alloc_image_info_data(&image_info->info_list[section_index]);
2408 info_data->tag = TAG_NONE;
2409 info_data->format = TAG_FMT_UNDEFINED;
2410 info_data->length = length;
2411 info_data->name = estrdup(name);
2412 info_data->value.s = safe_emalloc(length, 1, 1);
2413 memcpy(info_data->value.s, value, length);
2414 info_data->value.s[length] = 0;
2415 image_info->sections_found |= 1<<section_index;
2416 }
2417 }
2418 /* }}} */
2419
2420 /* {{{ exif_iif_free
2421 Free memory allocated for image_info
2422 */
exif_iif_free(image_info_type * image_info,int section_index)2423 static void exif_iif_free(image_info_type *image_info, int section_index) {
2424 int i;
2425 void *f; /* faster */
2426
2427 if (image_info->info_list[section_index].count) {
2428 for (i=0; i < image_info->info_list[section_index].count; i++) {
2429 if ((f=image_info->info_list[section_index].list[i].name) != NULL) {
2430 efree(f);
2431 }
2432 switch(image_info->info_list[section_index].list[i].format) {
2433 case TAG_FMT_UNDEFINED:
2434 case TAG_FMT_STRING:
2435 case TAG_FMT_SBYTE:
2436 case TAG_FMT_BYTE:
2437 default:
2438 if ((f=image_info->info_list[section_index].list[i].value.s) != NULL) {
2439 efree(f);
2440 }
2441 break;
2442
2443 case TAG_FMT_USHORT:
2444 case TAG_FMT_ULONG:
2445 case TAG_FMT_URATIONAL:
2446 case TAG_FMT_SSHORT:
2447 case TAG_FMT_SLONG:
2448 case TAG_FMT_SRATIONAL:
2449 case TAG_FMT_SINGLE:
2450 case TAG_FMT_DOUBLE:
2451 /* nothing to do here */
2452 if (image_info->info_list[section_index].list[i].length > 1) {
2453 if ((f=image_info->info_list[section_index].list[i].value.list) != NULL) {
2454 efree(f);
2455 }
2456 }
2457 break;
2458 }
2459 }
2460 }
2461 EFREE_IF(image_info->info_list[section_index].list);
2462 }
2463 /* }}} */
2464
2465 /* {{{ add_assoc_image_info
2466 * Add image_info to associative array value. */
add_assoc_image_info(zval * value,int sub_array,image_info_type * image_info,int section_index)2467 static void add_assoc_image_info(zval *value, int sub_array, image_info_type *image_info, int section_index)
2468 {
2469 char buffer[64], uname[64];
2470 int idx = 0, unknown = 0;
2471
2472 if (!image_info->info_list[section_index].count) {
2473 return;
2474 }
2475
2476 zval tmpi;
2477 if (sub_array) {
2478 array_init(&tmpi);
2479 } else {
2480 ZVAL_COPY_VALUE(&tmpi, value);
2481 }
2482
2483 for (int i = 0; i<image_info->info_list[section_index].count; i++) {
2484 image_info_data *info_data = &image_info->info_list[section_index].list[i];
2485 image_info_value *info_value = &info_data->value;
2486 const char *name = info_data->name;
2487 if (!name) {
2488 snprintf(uname, sizeof(uname), "%d", unknown++);
2489 name = uname;
2490 }
2491
2492 if (info_data->length == 0) {
2493 add_assoc_null(&tmpi, name);
2494 } else {
2495 switch (info_data->format) {
2496 default:
2497 /* Standard says more types possible but skip them...
2498 * but allow users to handle data if they know how to
2499 * So not return but use type UNDEFINED
2500 * return;
2501 */
2502 case TAG_FMT_BYTE:
2503 case TAG_FMT_SBYTE:
2504 case TAG_FMT_UNDEFINED:
2505 if (!info_value->s) {
2506 add_assoc_stringl(&tmpi, name, "", 0);
2507 } else {
2508 add_assoc_stringl(&tmpi, name, info_value->s, info_data->length);
2509 }
2510 break;
2511
2512 case TAG_FMT_STRING: {
2513 const char *val = info_value->s ? info_value->s : "";
2514 if (section_index==SECTION_COMMENT) {
2515 add_index_string(&tmpi, idx++, val);
2516 } else {
2517 add_assoc_string(&tmpi, name, val);
2518 }
2519 break;
2520 }
2521
2522 case TAG_FMT_URATIONAL:
2523 case TAG_FMT_SRATIONAL:
2524 case TAG_FMT_USHORT:
2525 case TAG_FMT_SSHORT:
2526 case TAG_FMT_SINGLE:
2527 case TAG_FMT_DOUBLE:
2528 case TAG_FMT_ULONG:
2529 case TAG_FMT_SLONG: {
2530 /* now the rest, first see if it becomes an array */
2531 zval array;
2532 int l = info_data->length;
2533 if (l > 1) {
2534 array_init(&array);
2535 }
2536 for (int ap = 0; ap < l; ap++) {
2537 if (l>1) {
2538 info_value = &info_data->value.list[ap];
2539 }
2540 switch (info_data->format) {
2541 case TAG_FMT_BYTE:
2542 if (l>1) {
2543 info_value = &info_data->value;
2544 for (int b = 0; b < l; b++) {
2545 add_index_long(&array, b, (int)(info_value->s[b]));
2546 }
2547 break;
2548 }
2549 ZEND_FALLTHROUGH;
2550 case TAG_FMT_USHORT:
2551 case TAG_FMT_ULONG:
2552 if (l==1) {
2553 add_assoc_long(&tmpi, name, (int)info_value->u);
2554 } else {
2555 add_index_long(&array, ap, (int)info_value->u);
2556 }
2557 break;
2558
2559 case TAG_FMT_URATIONAL:
2560 snprintf(buffer, sizeof(buffer), "%u/%u", info_value->ur.num, info_value->ur.den);
2561 if (l==1) {
2562 add_assoc_string(&tmpi, name, buffer);
2563 } else {
2564 add_index_string(&array, ap, buffer);
2565 }
2566 break;
2567
2568 case TAG_FMT_SBYTE:
2569 if (l>1) {
2570 info_value = &info_data->value;
2571 for (int b = 0; b < l; b++) {
2572 add_index_long(&array, ap, (int)info_value->s[b]);
2573 }
2574 break;
2575 }
2576 ZEND_FALLTHROUGH;
2577 case TAG_FMT_SSHORT:
2578 case TAG_FMT_SLONG:
2579 if (l==1) {
2580 add_assoc_long(&tmpi, name, info_value->i);
2581 } else {
2582 add_index_long(&array, ap, info_value->i);
2583 }
2584 break;
2585
2586 case TAG_FMT_SRATIONAL:
2587 snprintf(buffer, sizeof(buffer), "%i/%i", info_value->sr.num, info_value->sr.den);
2588 if (l==1) {
2589 add_assoc_string(&tmpi, name, buffer);
2590 } else {
2591 add_index_string(&array, ap, buffer);
2592 }
2593 break;
2594
2595 case TAG_FMT_SINGLE:
2596 if (l==1) {
2597 add_assoc_double(&tmpi, name, info_value->f);
2598 } else {
2599 add_index_double(&array, ap, info_value->f);
2600 }
2601 break;
2602
2603 case TAG_FMT_DOUBLE:
2604 if (l==1) {
2605 add_assoc_double(&tmpi, name, info_value->d);
2606 } else {
2607 add_index_double(&array, ap, info_value->d);
2608 }
2609 break;
2610 }
2611 }
2612 if (l > 1) {
2613 add_assoc_zval(&tmpi, name, &array);
2614 }
2615 break;
2616 }
2617 }
2618 }
2619 }
2620 if (sub_array) {
2621 add_assoc_zval(value, exif_get_sectionname(section_index), &tmpi);
2622 }
2623 }
2624 /* }}} */
2625
2626 /* {{{ Markers
2627 JPEG markers consist of one or more 0xFF bytes, followed by a marker
2628 code byte (which is not an FF). Here are the marker codes of interest
2629 in this program. (See jdmarker.c for a more complete list.)
2630 */
2631
2632 #define M_TEM 0x01 /* temp for arithmetic coding */
2633 #define M_RES 0x02 /* reserved */
2634 #define M_SOF0 0xC0 /* Start Of Frame N */
2635 #define M_SOF1 0xC1 /* N indicates which compression process */
2636 #define M_SOF2 0xC2 /* Only SOF0-SOF2 are now in common use */
2637 #define M_SOF3 0xC3
2638 #define M_DHT 0xC4
2639 #define M_SOF5 0xC5 /* NB: codes C4 and CC are NOT SOF markers */
2640 #define M_SOF6 0xC6
2641 #define M_SOF7 0xC7
2642 #define M_JPEG 0x08 /* reserved for extensions */
2643 #define M_SOF9 0xC9
2644 #define M_SOF10 0xCA
2645 #define M_SOF11 0xCB
2646 #define M_DAC 0xCC /* arithmetic table */
2647 #define M_SOF13 0xCD
2648 #define M_SOF14 0xCE
2649 #define M_SOF15 0xCF
2650 #define M_RST0 0xD0 /* restart segment */
2651 #define M_RST1 0xD1
2652 #define M_RST2 0xD2
2653 #define M_RST3 0xD3
2654 #define M_RST4 0xD4
2655 #define M_RST5 0xD5
2656 #define M_RST6 0xD6
2657 #define M_RST7 0xD7
2658 #define M_SOI 0xD8 /* Start Of Image (beginning of datastream) */
2659 #define M_EOI 0xD9 /* End Of Image (end of datastream) */
2660 #define M_SOS 0xDA /* Start Of Scan (begins compressed data) */
2661 #define M_DQT 0xDB
2662 #define M_DNL 0xDC
2663 #define M_DRI 0xDD
2664 #define M_DHP 0xDE
2665 #define M_EXP 0xDF
2666 #define M_APP0 0xE0 /* JPEG: 'JFIFF' AND (additional 'JFXX') */
2667 #define M_EXIF 0xE1 /* Exif Attribute Information */
2668 #define M_APP2 0xE2 /* Flash Pix Extension Data? */
2669 #define M_APP3 0xE3
2670 #define M_APP4 0xE4
2671 #define M_APP5 0xE5
2672 #define M_APP6 0xE6
2673 #define M_APP7 0xE7
2674 #define M_APP8 0xE8
2675 #define M_APP9 0xE9
2676 #define M_APP10 0xEA
2677 #define M_APP11 0xEB
2678 #define M_APP12 0xEC
2679 #define M_APP13 0xED /* IPTC International Press Telecommunications Council */
2680 #define M_APP14 0xEE /* Software, Copyright? */
2681 #define M_APP15 0xEF
2682 #define M_JPG0 0xF0
2683 #define M_JPG1 0xF1
2684 #define M_JPG2 0xF2
2685 #define M_JPG3 0xF3
2686 #define M_JPG4 0xF4
2687 #define M_JPG5 0xF5
2688 #define M_JPG6 0xF6
2689 #define M_JPG7 0xF7
2690 #define M_JPG8 0xF8
2691 #define M_JPG9 0xF9
2692 #define M_JPG10 0xFA
2693 #define M_JPG11 0xFB
2694 #define M_JPG12 0xFC
2695 #define M_JPG13 0xFD
2696 #define M_COM 0xFE /* COMment */
2697
2698 #define M_PSEUDO 0x123 /* Extra value. */
2699 /* }}} */
2700
2701 /* {{{ exif_process_COM
2702 Process a COM marker.
2703 We want to print out the marker contents as legible text;
2704 we must guard against random junk and varying newline representations.
2705 */
exif_process_COM(image_info_type * image_info,char * value,size_t length)2706 static void exif_process_COM (image_info_type *image_info, char *value, size_t length)
2707 {
2708 exif_iif_add_tag(image_info, SECTION_COMMENT, "Comment", TAG_COMPUTED_VALUE, TAG_FMT_STRING, length-2, value+2, length-2);
2709 }
2710 /* }}} */
2711
2712 /* {{{ exif_process_SOFn
2713 * Process a SOFn marker. This is useful for the image dimensions */
exif_process_SOFn(uchar * Data,int marker,jpeg_sof_info * result)2714 static void exif_process_SOFn (uchar *Data, int marker, jpeg_sof_info *result)
2715 {
2716 /* 0xFF SOSn SectLen(2) Bits(1) Height(2) Width(2) Channels(1) 3*Channels (1) */
2717 result->bits_per_sample = Data[2];
2718 result->height = php_jpg_get16(Data+3);
2719 result->width = php_jpg_get16(Data+5);
2720 result->num_components = Data[7];
2721 }
2722 /* }}} */
2723
2724 /* forward declarations */
2725 static bool exif_process_IFD_in_JPEG(image_info_type *ImageInfo, char *dir_start, const exif_offset_info *info, size_t displacement, int section_index, int tag);
2726 static bool exif_process_IFD_TAG(image_info_type *ImageInfo, char *dir_entry, const exif_offset_info *info, size_t displacement, int section_index, int ReadNextIFD, tag_table_type tag_table);
2727 static bool exif_process_IFD_in_TIFF(image_info_type *ImageInfo, size_t dir_offset, int section_index);
2728
2729 /* {{{ exif_get_markername
2730 Get name of marker */
2731 #ifdef EXIF_DEBUG
exif_get_markername(int marker)2732 static char * exif_get_markername(int marker)
2733 {
2734 switch(marker) {
2735 case 0xC0: return "SOF0";
2736 case 0xC1: return "SOF1";
2737 case 0xC2: return "SOF2";
2738 case 0xC3: return "SOF3";
2739 case 0xC4: return "DHT";
2740 case 0xC5: return "SOF5";
2741 case 0xC6: return "SOF6";
2742 case 0xC7: return "SOF7";
2743 case 0xC9: return "SOF9";
2744 case 0xCA: return "SOF10";
2745 case 0xCB: return "SOF11";
2746 case 0xCD: return "SOF13";
2747 case 0xCE: return "SOF14";
2748 case 0xCF: return "SOF15";
2749 case 0xD8: return "SOI";
2750 case 0xD9: return "EOI";
2751 case 0xDA: return "SOS";
2752 case 0xDB: return "DQT";
2753 case 0xDC: return "DNL";
2754 case 0xDD: return "DRI";
2755 case 0xDE: return "DHP";
2756 case 0xDF: return "EXP";
2757 case 0xE0: return "APP0";
2758 case 0xE1: return "EXIF";
2759 case 0xE2: return "FPIX";
2760 case 0xE3: return "APP3";
2761 case 0xE4: return "APP4";
2762 case 0xE5: return "APP5";
2763 case 0xE6: return "APP6";
2764 case 0xE7: return "APP7";
2765 case 0xE8: return "APP8";
2766 case 0xE9: return "APP9";
2767 case 0xEA: return "APP10";
2768 case 0xEB: return "APP11";
2769 case 0xEC: return "APP12";
2770 case 0xED: return "APP13";
2771 case 0xEE: return "APP14";
2772 case 0xEF: return "APP15";
2773 case 0xF0: return "JPG0";
2774 case 0xFD: return "JPG13";
2775 case 0xFE: return "COM";
2776 case 0x01: return "TEM";
2777 }
2778 return "Unknown";
2779 }
2780 #endif
2781 /* }}} */
2782
2783 /* {{{ Get headername for index or false if not defined */
PHP_FUNCTION(exif_tagname)2784 PHP_FUNCTION(exif_tagname)
2785 {
2786 zend_long tag;
2787 char *szTemp;
2788
2789 if (zend_parse_parameters(ZEND_NUM_ARGS(), "l", &tag) == FAILURE) {
2790 RETURN_THROWS();
2791 }
2792
2793 szTemp = exif_get_tagname(tag, tag_table_IFD);
2794 if (tag < 0 || !szTemp) {
2795 RETURN_FALSE;
2796 }
2797
2798 RETURN_STRING(szTemp);
2799 }
2800 /* }}} */
2801
2802 /* {{{ exif_ifd_make_value
2803 * Create a value for an ifd from an info_data pointer */
exif_ifd_make_value(image_info_data * info_data,int motorola_intel)2804 static void* exif_ifd_make_value(image_info_data *info_data, int motorola_intel) {
2805 size_t byte_count;
2806 char *value_ptr, *data_ptr;
2807 size_t i;
2808
2809 image_info_value *info_value;
2810
2811 byte_count = php_tiff_bytes_per_format[info_data->format] * info_data->length;
2812 value_ptr = safe_emalloc(max(byte_count, 4), 1, 0);
2813 memset(value_ptr, 0, 4);
2814 if (!info_data->length) {
2815 return value_ptr;
2816 }
2817 if (info_data->format == TAG_FMT_UNDEFINED || info_data->format == TAG_FMT_STRING
2818 || (byte_count>1 && (info_data->format == TAG_FMT_BYTE || info_data->format == TAG_FMT_SBYTE))
2819 ) {
2820 memmove(value_ptr, info_data->value.s, byte_count);
2821 return value_ptr;
2822 } else if (info_data->format == TAG_FMT_BYTE) {
2823 *value_ptr = info_data->value.u;
2824 return value_ptr;
2825 } else if (info_data->format == TAG_FMT_SBYTE) {
2826 *value_ptr = info_data->value.i;
2827 return value_ptr;
2828 } else {
2829 data_ptr = value_ptr;
2830 for(i=0; i<info_data->length; i++) {
2831 if (info_data->length==1) {
2832 info_value = &info_data->value;
2833 } else {
2834 info_value = &info_data->value.list[i];
2835 }
2836 switch(info_data->format) {
2837 case TAG_FMT_USHORT:
2838 php_ifd_set16u(data_ptr, info_value->u, motorola_intel);
2839 data_ptr += 2;
2840 break;
2841 case TAG_FMT_ULONG:
2842 php_ifd_set32u(data_ptr, info_value->u, motorola_intel);
2843 data_ptr += 4;
2844 break;
2845 case TAG_FMT_SSHORT:
2846 php_ifd_set16u(data_ptr, info_value->i, motorola_intel);
2847 data_ptr += 2;
2848 break;
2849 case TAG_FMT_SLONG:
2850 php_ifd_set32u(data_ptr, info_value->i, motorola_intel);
2851 data_ptr += 4;
2852 break;
2853 case TAG_FMT_URATIONAL:
2854 php_ifd_set32u(data_ptr, info_value->sr.num, motorola_intel);
2855 php_ifd_set32u(data_ptr+4, info_value->sr.den, motorola_intel);
2856 data_ptr += 8;
2857 break;
2858 case TAG_FMT_SRATIONAL:
2859 php_ifd_set32u(data_ptr, info_value->ur.num, motorola_intel);
2860 php_ifd_set32u(data_ptr+4, info_value->ur.den, motorola_intel);
2861 data_ptr += 8;
2862 break;
2863 case TAG_FMT_SINGLE:
2864 memmove(data_ptr, &info_value->f, 4);
2865 data_ptr += 4;
2866 break;
2867 case TAG_FMT_DOUBLE:
2868 memmove(data_ptr, &info_value->d, 8);
2869 data_ptr += 8;
2870 break;
2871 }
2872 }
2873 }
2874 return value_ptr;
2875 }
2876 /* }}} */
2877
2878 /* {{{ exif_thumbnail_build
2879 * Check and build thumbnail */
exif_thumbnail_build(image_info_type * ImageInfo)2880 static void exif_thumbnail_build(image_info_type *ImageInfo) {
2881 size_t new_size, new_move, new_value;
2882 char *new_data;
2883 void *value_ptr;
2884 int i, byte_count;
2885 image_info_list *info_list;
2886 image_info_data *info_data;
2887
2888 if (!ImageInfo->read_thumbnail || !ImageInfo->Thumbnail.offset || !ImageInfo->Thumbnail.size) {
2889 return; /* ignore this call */
2890 }
2891 #ifdef EXIF_DEBUG
2892 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Thumbnail: filetype = %d", ImageInfo->Thumbnail.filetype);
2893 #endif
2894 switch(ImageInfo->Thumbnail.filetype) {
2895 default:
2896 case IMAGE_FILETYPE_JPEG:
2897 /* done */
2898 break;
2899 case IMAGE_FILETYPE_TIFF_II:
2900 case IMAGE_FILETYPE_TIFF_MM:
2901 info_list = &ImageInfo->info_list[SECTION_THUMBNAIL];
2902 new_size = 8 + 2 + info_list->count * 12 + 4;
2903 #ifdef EXIF_DEBUG
2904 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Thumbnail: size of signature + directory(%d): 0x%02X", info_list->count, new_size);
2905 #endif
2906 new_value= new_size; /* offset for ifd values outside ifd directory */
2907 for (i=0; i<info_list->count; i++) {
2908 info_data = &info_list->list[i];
2909 byte_count = php_tiff_bytes_per_format[info_data->format] * info_data->length;
2910 if (byte_count > 4) {
2911 new_size += byte_count;
2912 }
2913 }
2914 new_move = new_size;
2915 new_data = safe_erealloc(ImageInfo->Thumbnail.data, 1, ImageInfo->Thumbnail.size, new_size);
2916 ImageInfo->Thumbnail.data = new_data;
2917 memmove(ImageInfo->Thumbnail.data + new_move, ImageInfo->Thumbnail.data, ImageInfo->Thumbnail.size);
2918 ImageInfo->Thumbnail.size += new_size;
2919 /* fill in data */
2920 if (ImageInfo->motorola_intel) {
2921 memmove(new_data, "MM\x00\x2a\x00\x00\x00\x08", 8);
2922 } else {
2923 memmove(new_data, "II\x2a\x00\x08\x00\x00\x00", 8);
2924 }
2925 new_data += 8;
2926 php_ifd_set16u(new_data, info_list->count, ImageInfo->motorola_intel);
2927 new_data += 2;
2928 for (i=0; i<info_list->count; i++) {
2929 info_data = &info_list->list[i];
2930 byte_count = php_tiff_bytes_per_format[info_data->format] * info_data->length;
2931 #ifdef EXIF_DEBUG
2932 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Thumbnail: process tag(x%04X=%s): %s%s (%d bytes)", info_data->tag, exif_get_tagname_debug(info_data->tag, tag_table_IFD), (info_data->length>1)&&info_data->format!=TAG_FMT_UNDEFINED&&info_data->format!=TAG_FMT_STRING?"ARRAY OF ":"", exif_get_tagformat(info_data->format), byte_count);
2933 #endif
2934 if (info_data->tag==TAG_STRIP_OFFSETS || info_data->tag==TAG_JPEG_INTERCHANGE_FORMAT) {
2935 php_ifd_set16u(new_data + 0, info_data->tag, ImageInfo->motorola_intel);
2936 php_ifd_set16u(new_data + 2, TAG_FMT_ULONG, ImageInfo->motorola_intel);
2937 php_ifd_set32u(new_data + 4, 1, ImageInfo->motorola_intel);
2938 php_ifd_set32u(new_data + 8, new_move, ImageInfo->motorola_intel);
2939 } else {
2940 php_ifd_set16u(new_data + 0, info_data->tag, ImageInfo->motorola_intel);
2941 php_ifd_set16u(new_data + 2, info_data->format, ImageInfo->motorola_intel);
2942 php_ifd_set32u(new_data + 4, info_data->length, ImageInfo->motorola_intel);
2943 value_ptr = exif_ifd_make_value(info_data, ImageInfo->motorola_intel);
2944 if (byte_count <= 4) {
2945 memmove(new_data+8, value_ptr, 4);
2946 } else {
2947 php_ifd_set32u(new_data+8, new_value, ImageInfo->motorola_intel);
2948 #ifdef EXIF_DEBUG
2949 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Thumbnail: writing with value offset: 0x%04X + 0x%02X", new_value, byte_count);
2950 #endif
2951 memmove(ImageInfo->Thumbnail.data+new_value, value_ptr, byte_count);
2952 new_value += byte_count;
2953 }
2954 efree(value_ptr);
2955 }
2956 new_data += 12;
2957 }
2958 memset(new_data, 0, 4); /* next ifd pointer */
2959 #ifdef EXIF_DEBUG
2960 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Thumbnail: created");
2961 #endif
2962 break;
2963 }
2964 }
2965 /* }}} */
2966
2967 /* {{{ exif_thumbnail_extract
2968 * Grab the thumbnail, corrected */
exif_thumbnail_extract(image_info_type * ImageInfo,const exif_offset_info * info)2969 static void exif_thumbnail_extract(image_info_type *ImageInfo, const exif_offset_info *info) {
2970 if (ImageInfo->Thumbnail.data) {
2971 exif_error_docref("exif_read_data#error_mult_thumb" EXIFERR_CC, ImageInfo, E_WARNING, "Multiple possible thumbnails");
2972 return; /* Should not happen */
2973 }
2974 if (!ImageInfo->read_thumbnail) {
2975 return; /* ignore this call */
2976 }
2977 /* according to exif2.1, the thumbnail is not supposed to be greater than 64K */
2978 if (ImageInfo->Thumbnail.size >= 65536
2979 || ImageInfo->Thumbnail.size <= 0
2980 || ImageInfo->Thumbnail.offset <= 0
2981 ) {
2982 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Illegal thumbnail size/offset");
2983 return;
2984 }
2985 /* Check to make sure we are not going to go past the ExifLength */
2986 char *thumbnail = exif_offset_info_try_get(
2987 info, ImageInfo->Thumbnail.offset, ImageInfo->Thumbnail.size);
2988 if (!thumbnail) {
2989 EXIF_ERRLOG_THUMBEOF(ImageInfo)
2990 return;
2991 }
2992 ImageInfo->Thumbnail.data = estrndup(thumbnail, ImageInfo->Thumbnail.size);
2993 exif_thumbnail_build(ImageInfo);
2994 }
2995 /* }}} */
2996
2997 /* {{{ exif_process_undefined
2998 * Copy a string/buffer in Exif header to a character string and return length of allocated buffer if any. */
exif_process_undefined(char ** result,char * value,size_t byte_count)2999 static int exif_process_undefined(char **result, char *value, size_t byte_count) {
3000 /* we cannot use strlcpy - here the problem is that we have to copy NUL
3001 * chars up to byte_count, we also have to add a single NUL character to
3002 * force end of string.
3003 * estrndup does not return length
3004 */
3005 if (byte_count) {
3006 (*result) = estrndup(value, byte_count); /* NULL @ byte_count!!! */
3007 return byte_count+1;
3008 }
3009 return 0;
3010 }
3011 /* }}} */
3012
3013 /* {{{ exif_process_string_raw
3014 * Copy a string in Exif header to a character string returns length of allocated buffer if any. */
exif_process_string_raw(char ** result,char * value,size_t byte_count)3015 static int exif_process_string_raw(char **result, char *value, size_t byte_count) {
3016 /* we cannot use strlcpy - here the problem is that we have to copy NUL
3017 * chars up to byte_count, we also have to add a single NUL character to
3018 * force end of string.
3019 */
3020 if (byte_count) {
3021 (*result) = safe_emalloc(byte_count, 1, 1);
3022 memcpy(*result, value, byte_count);
3023 (*result)[byte_count] = '\0';
3024 return byte_count+1;
3025 }
3026 return 0;
3027 }
3028 /* }}} */
3029
3030 /* {{{ exif_process_string
3031 * Copy a string in Exif header to a character string and return length of allocated buffer if any.
3032 * In contrast to exif_process_string this function does always return a string buffer */
exif_process_string(char ** result,char * value,size_t byte_count)3033 static int exif_process_string(char **result, char *value, size_t byte_count) {
3034 /* we cannot use strlcpy - here the problem is that we cannot use strlen to
3035 * determine length of string and we cannot use strlcpy with len=byte_count+1
3036 * because then we might get into an EXCEPTION if we exceed an allocated
3037 * memory page...so we use php_strnlen in conjunction with memcpy and add the NUL
3038 * char.
3039 * estrdup would sometimes allocate more memory and does not return length
3040 */
3041 if ((byte_count=php_strnlen(value, byte_count)) > 0) {
3042 return exif_process_undefined(result, value, byte_count);
3043 }
3044 (*result) = estrndup("", 1); /* force empty string */
3045 return byte_count+1;
3046 }
3047 /* }}} */
3048
3049 /* {{{ exif_process_user_comment
3050 * Process UserComment in IFD. */
exif_process_user_comment(image_info_type * ImageInfo,char ** pszInfoPtr,char ** pszEncoding,char * szValuePtr,int ByteCount)3051 static int exif_process_user_comment(image_info_type *ImageInfo, char **pszInfoPtr, char **pszEncoding, char *szValuePtr, int ByteCount)
3052 {
3053 int a;
3054 char *decode;
3055 size_t len;
3056
3057 *pszEncoding = NULL;
3058 /* Copy the comment */
3059 if (ByteCount>=8) {
3060 const zend_encoding *from, *to;
3061 if (!memcmp(szValuePtr, "UNICODE\0", 8)) {
3062 *pszEncoding = estrdup((const char*)szValuePtr);
3063 szValuePtr = szValuePtr+8;
3064 ByteCount -= 8;
3065 /* First try to detect BOM: ZERO WIDTH NOBREAK SPACE (FEFF 16)
3066 * since we have no encoding support for the BOM yet we skip that.
3067 */
3068 if (ByteCount >=2 && !memcmp(szValuePtr, "\xFE\xFF", 2)) {
3069 decode = "UCS-2BE";
3070 szValuePtr = szValuePtr+2;
3071 ByteCount -= 2;
3072 } else if (ByteCount >=2 && !memcmp(szValuePtr, "\xFF\xFE", 2)) {
3073 decode = "UCS-2LE";
3074 szValuePtr = szValuePtr+2;
3075 ByteCount -= 2;
3076 } else if (ImageInfo->motorola_intel) {
3077 decode = ImageInfo->decode_unicode_be;
3078 } else {
3079 decode = ImageInfo->decode_unicode_le;
3080 }
3081 to = zend_multibyte_fetch_encoding(ImageInfo->encode_unicode);
3082 from = zend_multibyte_fetch_encoding(decode);
3083 /* XXX this will fail again if encoding_converter returns on error something different than SIZE_MAX */
3084 if (!to || !from || zend_multibyte_encoding_converter(
3085 (unsigned char**)pszInfoPtr,
3086 &len,
3087 (unsigned char*)szValuePtr,
3088 ByteCount,
3089 to,
3090 from) == (size_t)-1) {
3091 len = exif_process_string_raw(pszInfoPtr, szValuePtr, ByteCount);
3092 }
3093 return len;
3094 } else if (!memcmp(szValuePtr, "ASCII\0\0\0", 8)) {
3095 *pszEncoding = estrdup((const char*)szValuePtr);
3096 szValuePtr = szValuePtr+8;
3097 ByteCount -= 8;
3098 } else if (!memcmp(szValuePtr, "JIS\0\0\0\0\0", 8)) {
3099 /* JIS should be translated to MB or we leave it to the user - leave it to the user */
3100 *pszEncoding = estrdup((const char*)szValuePtr);
3101 szValuePtr = szValuePtr+8;
3102 ByteCount -= 8;
3103 /* XXX this will fail again if encoding_converter returns on error something different than SIZE_MAX */
3104 to = zend_multibyte_fetch_encoding(ImageInfo->encode_jis);
3105 from = zend_multibyte_fetch_encoding(ImageInfo->motorola_intel ? ImageInfo->decode_jis_be : ImageInfo->decode_jis_le);
3106 if (!to || !from || zend_multibyte_encoding_converter(
3107 (unsigned char**)pszInfoPtr,
3108 &len,
3109 (unsigned char*)szValuePtr,
3110 ByteCount,
3111 to,
3112 from) == (size_t)-1) {
3113 len = exif_process_string_raw(pszInfoPtr, szValuePtr, ByteCount);
3114 }
3115 return len;
3116 } else if (!memcmp(szValuePtr, "\0\0\0\0\0\0\0\0", 8)) {
3117 /* 8 NULL means undefined and should be ASCII... */
3118 *pszEncoding = estrdup("UNDEFINED");
3119 szValuePtr = szValuePtr+8;
3120 ByteCount -= 8;
3121 }
3122 }
3123
3124 /* Olympus has this padded with trailing spaces. Remove these first. */
3125 if (ByteCount>0) {
3126 for (a=ByteCount-1;a && szValuePtr[a]==' ';a--) {
3127 (szValuePtr)[a] = '\0';
3128 }
3129 }
3130
3131 /* normal text without encoding */
3132 exif_process_string(pszInfoPtr, szValuePtr, ByteCount);
3133 return strlen(*pszInfoPtr);
3134 }
3135 /* }}} */
3136
3137 /* {{{ exif_process_unicode
3138 * Process unicode field in IFD. */
exif_process_unicode(image_info_type * ImageInfo,xp_field_type * xp_field,int tag,char * szValuePtr,int ByteCount)3139 static int exif_process_unicode(image_info_type *ImageInfo, xp_field_type *xp_field, int tag, char *szValuePtr, int ByteCount)
3140 {
3141 xp_field->tag = tag;
3142 xp_field->value = NULL;
3143 /* XXX this will fail again if encoding_converter returns on error something different than SIZE_MAX */
3144 if (zend_multibyte_encoding_converter(
3145 (unsigned char**)&xp_field->value,
3146 &xp_field->size,
3147 (unsigned char*)szValuePtr,
3148 ByteCount,
3149 zend_multibyte_fetch_encoding(ImageInfo->encode_unicode),
3150 zend_multibyte_fetch_encoding(ImageInfo->motorola_intel ? ImageInfo->decode_unicode_be : ImageInfo->decode_unicode_le)
3151 ) == (size_t)-1) {
3152 xp_field->size = exif_process_string_raw(&xp_field->value, szValuePtr, ByteCount);
3153 }
3154 return xp_field->size;
3155 }
3156 /* }}} */
3157
3158 /* {{{ exif_process_IFD_in_MAKERNOTE
3159 * Process nested IFDs directories in Maker Note. */
exif_process_IFD_in_MAKERNOTE(image_info_type * ImageInfo,char * value_ptr,int value_len,const exif_offset_info * info,size_t displacement)3160 static bool exif_process_IFD_in_MAKERNOTE(image_info_type *ImageInfo, char * value_ptr, int value_len, const exif_offset_info *info, size_t displacement)
3161 {
3162 size_t i;
3163 int de, section_index = SECTION_MAKERNOTE;
3164 int NumDirEntries, old_motorola_intel;
3165 const maker_note_type *maker_note;
3166 char *dir_start;
3167 exif_offset_info new_info;
3168
3169 for (i=0; i<=sizeof(maker_note_array)/sizeof(maker_note_type); i++) {
3170 if (i==sizeof(maker_note_array)/sizeof(maker_note_type)) {
3171 #ifdef EXIF_DEBUG
3172 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "No maker note data found. Detected maker: %s (length = %d)", ImageInfo->make, ImageInfo->make ? strlen(ImageInfo->make) : 0);
3173 #endif
3174 /* unknown manufacturer, not an error, use it as a string */
3175 return true;
3176 }
3177
3178 maker_note = maker_note_array+i;
3179
3180 if (maker_note->make && (!ImageInfo->make || strcmp(maker_note->make, ImageInfo->make)))
3181 continue;
3182 if (maker_note->id_string && value_len >= maker_note->id_string_len
3183 && strncmp(maker_note->id_string, value_ptr, maker_note->id_string_len))
3184 continue;
3185 break;
3186 }
3187
3188 if (value_len < 2 || maker_note->offset >= value_len - 1) {
3189 /* Do not go past the value end */
3190 exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "IFD data too short: 0x%04X offset 0x%04X", value_len, maker_note->offset);
3191 return true;
3192 }
3193
3194 if (UNEXPECTED(maker_note->tag_table == REQUIRES_CUSTOM_PARSING)) {
3195 /* Custom parsing required, which is not implemented at this point
3196 * Return true so that other metadata can still be parsed. */
3197 return true;
3198 }
3199
3200 dir_start = value_ptr + maker_note->offset;
3201
3202 #ifdef EXIF_DEBUG
3203 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Process %s @0x%04X + 0x%04X=%d: %s", exif_get_sectionname(section_index), (intptr_t)dir_start-(intptr_t)info->offset_base+maker_note->offset+displacement, value_len, value_len, exif_char_dump(value_ptr, value_len, (intptr_t)dir_start-(intptr_t)info->offset_base+maker_note->offset+displacement));
3204 #endif
3205
3206 ImageInfo->sections_found |= FOUND_MAKERNOTE;
3207
3208 old_motorola_intel = ImageInfo->motorola_intel;
3209 switch (maker_note->byte_order) {
3210 case MN_ORDER_INTEL:
3211 ImageInfo->motorola_intel = 0;
3212 break;
3213 case MN_ORDER_MOTOROLA:
3214 ImageInfo->motorola_intel = 1;
3215 break;
3216 default:
3217 case MN_ORDER_NORMAL:
3218 break;
3219 }
3220
3221 NumDirEntries = php_ifd_get16u(dir_start, ImageInfo->motorola_intel);
3222
3223 /* It can be that motorola_intel is wrongly mapped, let's try inverting it */
3224 if ((2+NumDirEntries*12) > value_len) {
3225 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Potentially invalid endianess, trying again with different endianness before imminent failure.");
3226
3227 ImageInfo->motorola_intel = ImageInfo->motorola_intel == 0 ? 1 : 0;
3228 NumDirEntries = php_ifd_get16u(dir_start, ImageInfo->motorola_intel);
3229 }
3230
3231 if ((2+NumDirEntries*12) > value_len) {
3232 exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "Illegal IFD size: 2 + 0x%04X*12 = 0x%04X > 0x%04X", NumDirEntries, 2+NumDirEntries*12, value_len);
3233 return false;
3234 }
3235 if ((dir_start - value_ptr) > value_len - (2+NumDirEntries*12)) {
3236 exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "Illegal IFD size: 0x%04X > 0x%04X", (dir_start - value_ptr) + (2+NumDirEntries*12), value_len);
3237 return false;
3238 }
3239
3240 switch (maker_note->offset_mode) {
3241 case MN_OFFSET_MAKER:
3242 exif_offset_info_init(&new_info, value_ptr, value_ptr, value_len);
3243 info = &new_info;
3244 break;
3245 default:
3246 case MN_OFFSET_NORMAL:
3247 break;
3248 }
3249
3250 for (de=0;de<NumDirEntries;de++) {
3251 size_t offset = 2 + 12 * de;
3252 if (!exif_process_IFD_TAG(ImageInfo, dir_start + offset,
3253 info, displacement, section_index, 0, maker_note->tag_table)) {
3254 return false;
3255 }
3256 }
3257 ImageInfo->motorola_intel = old_motorola_intel;
3258 /* NextDirOffset (must be NULL) = php_ifd_get32u(dir_start+2+12*de, ImageInfo->motorola_intel);*/
3259 #ifdef EXIF_DEBUG
3260 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Subsection %s done", exif_get_sectionname(SECTION_MAKERNOTE));
3261 #endif
3262 return true;
3263 }
3264 /* }}} */
3265
3266 #define REQUIRE_NON_EMPTY() do { \
3267 if (byte_count == 0) { \
3268 exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "Process tag(x%04X=%s): Cannot be empty", tag, exif_get_tagname_debug(tag, tag_table)); \
3269 return false; \
3270 } \
3271 } while (0)
3272
3273
3274 /* {{{ exif_process_IFD_TAG
3275 * Process one of the nested IFDs directories. */
exif_process_IFD_TAG_impl(image_info_type * ImageInfo,char * dir_entry,const exif_offset_info * info,size_t displacement,int section_index,int ReadNextIFD,tag_table_type tag_table)3276 static bool exif_process_IFD_TAG_impl(image_info_type *ImageInfo, char *dir_entry, const exif_offset_info *info, size_t displacement, int section_index, int ReadNextIFD, tag_table_type tag_table)
3277 {
3278 size_t length;
3279 unsigned int tag, format, components;
3280 char *value_ptr, tagname[64], cbuf[32], *outside=NULL;
3281 size_t byte_count, offset_val, fpos, fgot;
3282 int64_t byte_count_signed;
3283 xp_field_type *tmp_xp;
3284 #ifdef EXIF_DEBUG
3285 char *dump_data;
3286 int dump_free;
3287 #endif /* EXIF_DEBUG */
3288
3289 tag = php_ifd_get16u(dir_entry, ImageInfo->motorola_intel);
3290 format = php_ifd_get16u(dir_entry+2, ImageInfo->motorola_intel);
3291 components = php_ifd_get32u(dir_entry+4, ImageInfo->motorola_intel);
3292
3293 if (!format || format > NUM_FORMATS) {
3294 /* (-1) catches illegal zero case as unsigned underflows to positive large. */
3295 exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "Process tag(x%04X=%s): Illegal format code 0x%04X, suppose BYTE", tag, exif_get_tagname_debug(tag, tag_table), format);
3296 format = TAG_FMT_BYTE;
3297 }
3298
3299 byte_count_signed = (int64_t)components * php_tiff_bytes_per_format[format];
3300
3301 if (byte_count_signed < 0 || (byte_count_signed > INT32_MAX)) {
3302 exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "Process tag(x%04X=%s): Illegal byte_count", tag, exif_get_tagname_debug(tag, tag_table));
3303 return false;
3304 }
3305
3306 byte_count = (size_t)byte_count_signed;
3307
3308 if (byte_count > 4) {
3309 /* If its bigger than 4 bytes, the dir entry contains an offset. */
3310 offset_val = php_ifd_get32u(dir_entry+8, ImageInfo->motorola_intel);
3311 value_ptr = exif_offset_info_try_get(info, offset_val, byte_count);
3312 if (!value_ptr) {
3313 /* It is important to check for IMAGE_FILETYPE_TIFF
3314 * JPEG does not use absolute pointers instead its pointers are
3315 * relative to the start of the TIFF header in APP1 section. */
3316 // TODO: Shouldn't we also be taking "displacement" into account here?
3317 if (byte_count > ImageInfo->FileSize || offset_val>ImageInfo->FileSize-byte_count || (ImageInfo->FileType!=IMAGE_FILETYPE_TIFF_II && ImageInfo->FileType!=IMAGE_FILETYPE_TIFF_MM && ImageInfo->FileType!=IMAGE_FILETYPE_JPEG)) {
3318 exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "Process tag(x%04X=%s): Illegal pointer offset(x%04X + x%04X = x%04X > x%04X)", tag, exif_get_tagname_debug(tag, tag_table), offset_val, byte_count, offset_val+byte_count, ImageInfo->FileSize);
3319 return false;
3320 }
3321 if (byte_count>sizeof(cbuf)) {
3322 /* mark as outside range and get buffer */
3323 value_ptr = safe_emalloc(byte_count, 1, 0);
3324 outside = value_ptr;
3325 } else {
3326 /* In most cases we only access a small range so
3327 * it is faster to use a static buffer there
3328 * BUT it offers also the possibility to have
3329 * pointers read without the need to free them
3330 * explicitley before returning. */
3331 memset(&cbuf, 0, sizeof(cbuf));
3332 value_ptr = cbuf;
3333 }
3334
3335 fpos = php_stream_tell(ImageInfo->infile);
3336 php_stream_seek(ImageInfo->infile, displacement+offset_val, SEEK_SET);
3337 fgot = php_stream_tell(ImageInfo->infile);
3338 if (fgot!=displacement+offset_val) {
3339 EFREE_IF(outside);
3340 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Wrong file pointer: 0x%08X != 0x%08X", fgot, displacement+offset_val);
3341 return false;
3342 }
3343 fgot = exif_read_from_stream_file_looped(ImageInfo->infile, value_ptr, byte_count);
3344 php_stream_seek(ImageInfo->infile, fpos, SEEK_SET);
3345 if (fgot != byte_count) {
3346 EFREE_IF(outside);
3347 EXIF_ERRLOG_FILEEOF(ImageInfo)
3348 return false;
3349 }
3350 }
3351 } else {
3352 /* 4 bytes or less and value is in the dir entry itself */
3353 value_ptr = dir_entry+8;
3354 // TODO: This is dubious, but the value is only used for debugging.
3355 offset_val = value_ptr-info->offset_base;
3356 }
3357
3358 ImageInfo->sections_found |= FOUND_ANY_TAG;
3359 #ifdef EXIF_DEBUG
3360 dump_data = exif_dump_data(&dump_free, format, components, ImageInfo->motorola_intel, value_ptr);
3361 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE,
3362 "Process tag(x%04X=%s,@0x%04X + x%04X(=%d)): %s%s %s",
3363 tag, exif_get_tagname_debug(tag, tag_table), offset_val+displacement, byte_count, byte_count, (components>1)&&format!=TAG_FMT_UNDEFINED&&format!=TAG_FMT_STRING?"ARRAY OF ":"", exif_get_tagformat(format), dump_data);
3364 if (dump_free) {
3365 efree(dump_data);
3366 }
3367 #endif
3368
3369 /* NB: The following code may not assume that there is at least one component!
3370 * byte_count may be zero! */
3371
3372 if (section_index==SECTION_THUMBNAIL) {
3373 if (!ImageInfo->Thumbnail.data) {
3374 REQUIRE_NON_EMPTY();
3375 switch(tag) {
3376 case TAG_IMAGEWIDTH:
3377 case TAG_COMP_IMAGE_WIDTH:
3378 ImageInfo->Thumbnail.width = exif_convert_any_to_int(value_ptr, exif_rewrite_tag_format_to_unsigned(format), ImageInfo->motorola_intel);
3379 break;
3380
3381 case TAG_IMAGEHEIGHT:
3382 case TAG_COMP_IMAGE_HEIGHT:
3383 ImageInfo->Thumbnail.height = exif_convert_any_to_int(value_ptr, exif_rewrite_tag_format_to_unsigned(format), ImageInfo->motorola_intel);
3384 break;
3385
3386 case TAG_STRIP_OFFSETS:
3387 case TAG_JPEG_INTERCHANGE_FORMAT:
3388 /* accept both formats */
3389 ImageInfo->Thumbnail.offset = exif_convert_any_to_int(value_ptr, exif_rewrite_tag_format_to_unsigned(format), ImageInfo->motorola_intel);
3390 break;
3391
3392 case TAG_STRIP_BYTE_COUNTS:
3393 if (ImageInfo->FileType == IMAGE_FILETYPE_TIFF_II || ImageInfo->FileType == IMAGE_FILETYPE_TIFF_MM) {
3394 ImageInfo->Thumbnail.filetype = ImageInfo->FileType;
3395 } else {
3396 /* motorola is easier to read */
3397 ImageInfo->Thumbnail.filetype = IMAGE_FILETYPE_TIFF_MM;
3398 }
3399 ImageInfo->Thumbnail.size = exif_convert_any_to_int(value_ptr, exif_rewrite_tag_format_to_unsigned(format), ImageInfo->motorola_intel);
3400 break;
3401
3402 case TAG_JPEG_INTERCHANGE_FORMAT_LEN:
3403 if (ImageInfo->Thumbnail.filetype == IMAGE_FILETYPE_UNKNOWN) {
3404 ImageInfo->Thumbnail.filetype = IMAGE_FILETYPE_JPEG;
3405 ImageInfo->Thumbnail.size = exif_convert_any_to_int(value_ptr, exif_rewrite_tag_format_to_unsigned(format), ImageInfo->motorola_intel);
3406 }
3407 break;
3408 }
3409 }
3410 } else {
3411 if (section_index==SECTION_IFD0 || section_index==SECTION_EXIF)
3412 switch(tag) {
3413 case TAG_COPYRIGHT:
3414 /* check for "<photographer> NUL <editor> NUL" */
3415 if (byte_count>1 && (length=php_strnlen(value_ptr, byte_count)) > 0) {
3416 if (length<byte_count-1) {
3417 /* When there are any characters after the first NUL */
3418 EFREE_IF(ImageInfo->CopyrightPhotographer);
3419 EFREE_IF(ImageInfo->CopyrightEditor);
3420 EFREE_IF(ImageInfo->Copyright);
3421 ImageInfo->CopyrightPhotographer = estrdup(value_ptr);
3422 ImageInfo->CopyrightEditor = estrndup(value_ptr+length+1, byte_count-length-1);
3423 spprintf(&ImageInfo->Copyright, 0, "%s, %s", ImageInfo->CopyrightPhotographer, ImageInfo->CopyrightEditor);
3424 /* format = TAG_FMT_UNDEFINED; this mustn't be ASCII */
3425 /* but we are not supposed to change this */
3426 /* keep in mind that image_info does not store editor value */
3427 } else {
3428 EFREE_IF(ImageInfo->Copyright);
3429 ImageInfo->Copyright = estrndup(value_ptr, byte_count);
3430 }
3431 }
3432 break;
3433
3434 case TAG_USERCOMMENT:
3435 EFREE_IF(ImageInfo->UserComment);
3436 ImageInfo->UserComment = NULL;
3437 EFREE_IF(ImageInfo->UserCommentEncoding);
3438 ImageInfo->UserCommentEncoding = NULL;
3439 ImageInfo->UserCommentLength = exif_process_user_comment(ImageInfo, &(ImageInfo->UserComment), &(ImageInfo->UserCommentEncoding), value_ptr, byte_count);
3440 break;
3441
3442 case TAG_XP_TITLE:
3443 case TAG_XP_COMMENTS:
3444 case TAG_XP_AUTHOR:
3445 case TAG_XP_KEYWORDS:
3446 case TAG_XP_SUBJECT:
3447 tmp_xp = (xp_field_type*)safe_erealloc(ImageInfo->xp_fields.list, (ImageInfo->xp_fields.count+1), sizeof(xp_field_type), 0);
3448 ImageInfo->sections_found |= FOUND_WINXP;
3449 ImageInfo->xp_fields.list = tmp_xp;
3450 ImageInfo->xp_fields.count++;
3451 exif_process_unicode(ImageInfo, &(ImageInfo->xp_fields.list[ImageInfo->xp_fields.count-1]), tag, value_ptr, byte_count);
3452 break;
3453
3454 case TAG_FNUMBER:
3455 /* Simplest way of expressing aperture, so I trust it the most.
3456 (overwrite previously computed value if there is one) */
3457 REQUIRE_NON_EMPTY();
3458 ImageInfo->ApertureFNumber = (float)exif_convert_any_format(value_ptr, format, ImageInfo->motorola_intel);
3459 break;
3460
3461 case TAG_APERTURE:
3462 case TAG_MAX_APERTURE:
3463 /* More relevant info always comes earlier, so only use this field if we don't
3464 have appropriate aperture information yet. */
3465 if (ImageInfo->ApertureFNumber == 0) {
3466 REQUIRE_NON_EMPTY();
3467 ImageInfo->ApertureFNumber
3468 = expf(exif_convert_any_format(value_ptr, format, ImageInfo->motorola_intel)*logf(2.0)*0.5);
3469 }
3470 break;
3471
3472 case TAG_SHUTTERSPEED:
3473 /* More complicated way of expressing exposure time, so only use
3474 this value if we don't already have it from somewhere else.
3475 SHUTTERSPEED comes after EXPOSURE TIME
3476 */
3477 if (ImageInfo->ExposureTime == 0) {
3478 REQUIRE_NON_EMPTY();
3479 ImageInfo->ExposureTime
3480 = expf(-exif_convert_any_format(value_ptr, format, ImageInfo->motorola_intel)*logf(2.0));
3481 }
3482 break;
3483 case TAG_EXPOSURETIME:
3484 ImageInfo->ExposureTime = -1;
3485 break;
3486
3487 case TAG_COMP_IMAGE_WIDTH:
3488 REQUIRE_NON_EMPTY();
3489 ImageInfo->ExifImageWidth = exif_convert_any_to_int(value_ptr, exif_rewrite_tag_format_to_unsigned(format), ImageInfo->motorola_intel);
3490 break;
3491
3492 case TAG_FOCALPLANE_X_RES:
3493 REQUIRE_NON_EMPTY();
3494 ImageInfo->FocalplaneXRes = exif_convert_any_format(value_ptr, format, ImageInfo->motorola_intel);
3495 break;
3496
3497 case TAG_SUBJECT_DISTANCE:
3498 /* Inidcates the distacne the autofocus camera is focused to.
3499 Tends to be less accurate as distance increases. */
3500 REQUIRE_NON_EMPTY();
3501 ImageInfo->Distance = (float)exif_convert_any_format(value_ptr, format, ImageInfo->motorola_intel);
3502 break;
3503
3504 case TAG_FOCALPLANE_RESOLUTION_UNIT:
3505 REQUIRE_NON_EMPTY();
3506 switch (exif_convert_any_to_int(value_ptr, format, ImageInfo->motorola_intel)) {
3507 case 1: ImageInfo->FocalplaneUnits = 25.4; break; /* inch */
3508 case 2:
3509 /* According to the information I was using, 2 measn meters.
3510 But looking at the Cannon powershot's files, inches is the only
3511 sensible value. */
3512 ImageInfo->FocalplaneUnits = 25.4;
3513 break;
3514
3515 case 3: ImageInfo->FocalplaneUnits = 10; break; /* centimeter */
3516 case 4: ImageInfo->FocalplaneUnits = 1; break; /* milimeter */
3517 case 5: ImageInfo->FocalplaneUnits = .001; break; /* micrometer */
3518 }
3519 break;
3520
3521 case TAG_SUB_IFD:
3522 if (format==TAG_FMT_IFD) {
3523 /* If this is called we are either in a TIFFs thumbnail or a JPEG where we cannot handle it */
3524 /* TIFF thumbnail: our data structure cannot store a thumbnail of a thumbnail */
3525 /* JPEG do we have the data area and what to do with it */
3526 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Skip SUB IFD");
3527 }
3528 break;
3529
3530 case TAG_MAKE:
3531 EFREE_IF(ImageInfo->make);
3532 ImageInfo->make = estrndup(value_ptr, byte_count);
3533 break;
3534 case TAG_MODEL:
3535 EFREE_IF(ImageInfo->model);
3536 ImageInfo->model = estrndup(value_ptr, byte_count);
3537 break;
3538
3539 case TAG_MAKER_NOTE:
3540 if (!exif_process_IFD_in_MAKERNOTE(ImageInfo, value_ptr, byte_count, info, displacement)) {
3541 EFREE_IF(outside);
3542 return false;
3543 }
3544 break;
3545
3546 case TAG_EXIF_IFD_POINTER:
3547 case TAG_GPS_IFD_POINTER:
3548 case TAG_INTEROP_IFD_POINTER:
3549 if (ReadNextIFD) {
3550 REQUIRE_NON_EMPTY();
3551 char *Subdir_start;
3552 int sub_section_index = 0;
3553 switch(tag) {
3554 case TAG_EXIF_IFD_POINTER:
3555 #ifdef EXIF_DEBUG
3556 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Found EXIF");
3557 #endif
3558 ImageInfo->sections_found |= FOUND_EXIF;
3559 sub_section_index = SECTION_EXIF;
3560 break;
3561 case TAG_GPS_IFD_POINTER:
3562 #ifdef EXIF_DEBUG
3563 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Found GPS");
3564 #endif
3565 ImageInfo->sections_found |= FOUND_GPS;
3566 sub_section_index = SECTION_GPS;
3567 break;
3568 case TAG_INTEROP_IFD_POINTER:
3569 #ifdef EXIF_DEBUG
3570 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Found INTEROPERABILITY");
3571 #endif
3572 ImageInfo->sections_found |= FOUND_INTEROP;
3573 sub_section_index = SECTION_INTEROP;
3574 break;
3575 }
3576 offset_val = php_ifd_get32u(value_ptr, ImageInfo->motorola_intel);
3577 Subdir_start = exif_offset_info_try_get(info, offset_val, 0);
3578 if (!Subdir_start) {
3579 exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "Illegal IFD Pointer");
3580 EFREE_IF(outside);
3581 return false;
3582 }
3583 if (!exif_process_IFD_in_JPEG(ImageInfo, Subdir_start, info, displacement, sub_section_index, tag)) {
3584 EFREE_IF(outside);
3585 return false;
3586 }
3587 #ifdef EXIF_DEBUG
3588 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Subsection %s done", exif_get_sectionname(sub_section_index));
3589 #endif
3590 }
3591 }
3592 }
3593 exif_iif_add_tag(ImageInfo, section_index, exif_get_tagname_key(tag, tagname, sizeof(tagname), tag_table), tag, format, components, value_ptr, byte_count);
3594 EFREE_IF(outside);
3595 return true;
3596 }
3597 /* }}} */
3598
exif_process_IFD_TAG(image_info_type * ImageInfo,char * dir_entry,const exif_offset_info * info,size_t displacement,int section_index,int ReadNextIFD,tag_table_type tag_table)3599 static bool exif_process_IFD_TAG(image_info_type *ImageInfo, char *dir_entry, const exif_offset_info *info, size_t displacement, int section_index, int ReadNextIFD, tag_table_type tag_table)
3600 {
3601 bool result;
3602 /* Protect against corrupt headers */
3603 if (ImageInfo->ifd_count++ > MAX_IFD_TAGS) {
3604 exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "corrupt EXIF header: maximum IFD tag count reached");
3605 return false;
3606 }
3607 if (ImageInfo->ifd_nesting_level > MAX_IFD_NESTING_LEVEL) {
3608 exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "corrupt EXIF header: maximum directory nesting level reached");
3609 return false;
3610 }
3611 ImageInfo->ifd_nesting_level++;
3612 result = exif_process_IFD_TAG_impl(ImageInfo, dir_entry, info, displacement, section_index, ReadNextIFD, tag_table);
3613 ImageInfo->ifd_nesting_level--;
3614 return result;
3615 }
3616
3617 /* {{{ exif_process_IFD_in_JPEG
3618 * Process one of the nested IFDs directories. */
exif_process_IFD_in_JPEG(image_info_type * ImageInfo,char * dir_start,const exif_offset_info * info,size_t displacement,int section_index,int tag)3619 static bool exif_process_IFD_in_JPEG(image_info_type *ImageInfo, char *dir_start, const exif_offset_info *info, size_t displacement, int section_index, int tag)
3620 {
3621 int de;
3622 int NumDirEntries;
3623 int NextDirOffset = 0;
3624
3625 #ifdef EXIF_DEBUG
3626 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Process %s (x%04X(=%d))", exif_get_sectionname(section_index), exif_offset_info_length(info), exif_offset_info_length(info));
3627 #endif
3628
3629 ImageInfo->sections_found |= FOUND_IFD0;
3630
3631 if (!exif_offset_info_contains(info, dir_start, 2)) {
3632 exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "Illegal IFD size");
3633 return false;
3634 }
3635
3636 NumDirEntries = php_ifd_get16u(dir_start, ImageInfo->motorola_intel);
3637
3638 if (!exif_offset_info_contains(info, dir_start+2, NumDirEntries*12)) {
3639 exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "Illegal IFD size: x%04X + 2 + x%04X*12 = x%04X > x%04X", (int)((size_t)dir_start+2-(size_t)info->valid_start), NumDirEntries, (int)((size_t)dir_start+2+NumDirEntries*12-(size_t)info->valid_start), info->valid_end - info->valid_start);
3640 return false;
3641 }
3642
3643 for (de=0;de<NumDirEntries;de++) {
3644 if (!exif_process_IFD_TAG(ImageInfo, dir_start + 2 + 12 * de,
3645 info, displacement, section_index, 1, exif_get_tag_table(section_index))) {
3646 return false;
3647 }
3648 }
3649 /*
3650 * Ignore IFD2 if it purportedly exists
3651 */
3652 if (section_index == SECTION_THUMBNAIL) {
3653 return true;
3654 }
3655 /*
3656 * Hack to make it process IDF1 I hope
3657 * There are 2 IDFs, the second one holds the keys (0x0201 and 0x0202) to the thumbnail
3658 */
3659 if (!exif_offset_info_contains(info, dir_start+2+NumDirEntries*12, 4)) {
3660 exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "Illegal IFD size");
3661 return false;
3662 }
3663
3664 if (tag != TAG_EXIF_IFD_POINTER && tag != TAG_GPS_IFD_POINTER) {
3665 NextDirOffset = php_ifd_get32u(dir_start+2+12*de, ImageInfo->motorola_intel);
3666 }
3667
3668 if (NextDirOffset) {
3669 char *next_dir_start = exif_offset_info_try_get(info, NextDirOffset, 0);
3670 if (!next_dir_start) {
3671 exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "Illegal IFD offset");
3672 return false;
3673 }
3674 /* That is the IFD for the first thumbnail */
3675 #ifdef EXIF_DEBUG
3676 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Expect next IFD to be thumbnail");
3677 #endif
3678 if (exif_process_IFD_in_JPEG(ImageInfo, next_dir_start, info, displacement, SECTION_THUMBNAIL, 0)) {
3679 #ifdef EXIF_DEBUG
3680 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Thumbnail size: 0x%04X", ImageInfo->Thumbnail.size);
3681 #endif
3682 if (ImageInfo->Thumbnail.filetype != IMAGE_FILETYPE_UNKNOWN
3683 && ImageInfo->Thumbnail.size
3684 && ImageInfo->Thumbnail.offset
3685 && ImageInfo->read_thumbnail
3686 ) {
3687 exif_thumbnail_extract(ImageInfo, info);
3688 }
3689 return true;
3690 } else {
3691 return false;
3692 }
3693 }
3694 return true;
3695 }
3696 /* }}} */
3697
3698 /* {{{ exif_process_TIFF_in_JPEG
3699 Process a TIFF header in a JPEG file
3700 */
exif_process_TIFF_in_JPEG(image_info_type * ImageInfo,char * CharBuf,size_t length,size_t displacement)3701 static void exif_process_TIFF_in_JPEG(image_info_type *ImageInfo, char *CharBuf, size_t length, size_t displacement)
3702 {
3703 unsigned exif_value_2a, offset_of_ifd;
3704 exif_offset_info info;
3705
3706 if (length < 2) {
3707 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Missing TIFF alignment marker");
3708 return;
3709 }
3710
3711 if (length < 2) {
3712 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Missing TIFF alignment marker");
3713 return;
3714 }
3715
3716 /* set the thumbnail stuff to nothing so we can test to see if they get set up */
3717 if (memcmp(CharBuf, "II", 2) == 0) {
3718 ImageInfo->motorola_intel = 0;
3719 } else if (memcmp(CharBuf, "MM", 2) == 0) {
3720 ImageInfo->motorola_intel = 1;
3721 } else {
3722 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Invalid TIFF alignment marker");
3723 return;
3724 }
3725
3726 /* Check the next two values for correctness. */
3727 if (length < 8) {
3728 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Invalid TIFF start (1)");
3729 return;
3730 }
3731 exif_value_2a = php_ifd_get16u(CharBuf+2, ImageInfo->motorola_intel);
3732 offset_of_ifd = php_ifd_get32u(CharBuf+4, ImageInfo->motorola_intel);
3733 if (exif_value_2a != 0x2a || offset_of_ifd < 0x08) {
3734 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Invalid TIFF start (1)");
3735 return;
3736 }
3737 if (offset_of_ifd > length) {
3738 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Invalid IFD start");
3739 return;
3740 }
3741
3742 ImageInfo->sections_found |= FOUND_IFD0;
3743 /* First directory starts at offset 8. Offsets starts at 0. */
3744 exif_offset_info_init(&info, CharBuf, CharBuf, length/*-14*/);
3745 exif_process_IFD_in_JPEG(ImageInfo, CharBuf+offset_of_ifd, &info, displacement, SECTION_IFD0, 0);
3746
3747 #ifdef EXIF_DEBUG
3748 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Process TIFF in JPEG done");
3749 #endif
3750
3751 /* Compute the CCD width, in millimeters. */
3752 if (ImageInfo->FocalplaneXRes != 0) {
3753 ImageInfo->CCDWidth = (float)(ImageInfo->ExifImageWidth * ImageInfo->FocalplaneUnits / ImageInfo->FocalplaneXRes);
3754 }
3755 }
3756 /* }}} */
3757
3758 /* {{{ exif_process_APP1
3759 Process an JPEG APP1 block marker
3760 Describes all the drivel that most digital cameras include...
3761 */
exif_process_APP1(image_info_type * ImageInfo,char * CharBuf,size_t length,size_t displacement)3762 static void exif_process_APP1(image_info_type *ImageInfo, char *CharBuf, size_t length, size_t displacement)
3763 {
3764 /* Check the APP1 for Exif Identifier Code */
3765 static const uchar ExifHeader[] = {0x45, 0x78, 0x69, 0x66, 0x00, 0x00};
3766 if (length <= 8 || memcmp(CharBuf+2, ExifHeader, 6)) {
3767 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Incorrect APP1 Exif Identifier Code");
3768 return;
3769 }
3770 exif_process_TIFF_in_JPEG(ImageInfo, CharBuf + 8, length - 8, displacement+8);
3771 #ifdef EXIF_DEBUG
3772 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Process APP1/EXIF done");
3773 #endif
3774 }
3775 /* }}} */
3776
3777 /* {{{ exif_process_APP12
3778 Process an JPEG APP12 block marker used by OLYMPUS
3779 */
exif_process_APP12(image_info_type * ImageInfo,char * buffer,size_t length)3780 static void exif_process_APP12(image_info_type *ImageInfo, char *buffer, size_t length)
3781 {
3782 size_t l1, l2=0;
3783
3784 if ((l1 = php_strnlen(buffer+2, length-2)) > 0) {
3785 exif_iif_add_tag(ImageInfo, SECTION_APP12, "Company", TAG_NONE, TAG_FMT_STRING, l1, buffer+2, l1);
3786 if (length > 2+l1+1) {
3787 l2 = php_strnlen(buffer+2+l1+1, length-2-l1-1);
3788 exif_iif_add_tag(ImageInfo, SECTION_APP12, "Info", TAG_NONE, TAG_FMT_STRING, l2, buffer+2+l1+1, l2);
3789 }
3790 }
3791 #ifdef EXIF_DEBUG
3792 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Process section APP12 with l1=%d, l2=%d done", l1, l2);
3793 #endif
3794 }
3795 /* }}} */
3796
3797 /* {{{ exif_scan_JPEG_header
3798 * Parse the marker stream until SOS or EOI is seen; */
exif_scan_JPEG_header(image_info_type * ImageInfo)3799 static bool exif_scan_JPEG_header(image_info_type *ImageInfo)
3800 {
3801 int section, sn;
3802 int marker = 0, last_marker = M_PSEUDO, comment_correction=1;
3803 unsigned int ll, lh;
3804 uchar *Data;
3805 size_t fpos, size, got, itemlen;
3806 jpeg_sof_info sof_info;
3807
3808 for(section=0;;section++) {
3809 #ifdef EXIF_DEBUG
3810 fpos = php_stream_tell(ImageInfo->infile);
3811 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Needing section %d @ 0x%08X", ImageInfo->file.count, fpos);
3812 #endif
3813
3814 /* get marker byte, swallowing possible padding */
3815 /* some software does not count the length bytes of COM section */
3816 /* one company doing so is very much involved in JPEG... so we accept too */
3817 if (last_marker==M_COM && comment_correction) {
3818 comment_correction = 2;
3819 }
3820 do {
3821 if ((marker = php_stream_getc(ImageInfo->infile)) == EOF) {
3822 EXIF_ERRLOG_CORRUPT(ImageInfo)
3823 return false;
3824 }
3825 if (last_marker==M_COM && comment_correction>0) {
3826 if (marker!=0xFF) {
3827 marker = 0xff;
3828 comment_correction--;
3829 } else {
3830 last_marker = M_PSEUDO; /* stop skipping 0 for M_COM */
3831 }
3832 }
3833 } while (marker == 0xff);
3834 if (last_marker==M_COM && !comment_correction) {
3835 exif_error_docref("exif_read_data#error_mcom" EXIFERR_CC, ImageInfo, E_NOTICE, "Image has corrupt COM section: some software set wrong length information");
3836 }
3837 if (last_marker==M_COM && comment_correction)
3838 return M_EOI; /* ah illegal: char after COM section not 0xFF */
3839
3840 fpos = php_stream_tell(ImageInfo->infile);
3841
3842 if (marker == 0xff) {
3843 /* 0xff is legal padding, but if we get that many, something's wrong. */
3844 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "To many padding bytes");
3845 return false;
3846 }
3847
3848 /* Read the length of the section. */
3849 if ((lh = php_stream_getc(ImageInfo->infile)) == (unsigned int)EOF) {
3850 EXIF_ERRLOG_CORRUPT(ImageInfo)
3851 return false;
3852 }
3853 if ((ll = php_stream_getc(ImageInfo->infile)) == (unsigned int)EOF) {
3854 EXIF_ERRLOG_CORRUPT(ImageInfo)
3855 return false;
3856 }
3857
3858 itemlen = (lh << 8) | ll;
3859
3860 if (itemlen < 2) {
3861 #ifdef EXIF_DEBUG
3862 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "%s, Section length: 0x%02X%02X", EXIF_ERROR_CORRUPT, lh, ll);
3863 #else
3864 EXIF_ERRLOG_CORRUPT(ImageInfo)
3865 #endif
3866 return false;
3867 }
3868
3869 sn = exif_file_sections_add(ImageInfo, marker, itemlen, NULL);
3870 Data = ImageInfo->file.list[sn].data;
3871
3872 /* Store first two pre-read bytes. */
3873 Data[0] = (uchar)lh;
3874 Data[1] = (uchar)ll;
3875
3876 got = exif_read_from_stream_file_looped(ImageInfo->infile, (char*)(Data+2), itemlen-2); /* Read the whole section. */
3877 if (got != itemlen-2) {
3878 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Error reading from file: got=x%04X(=%d) != itemlen-2=x%04X(=%d)", got, got, itemlen-2, itemlen-2);
3879 return false;
3880 }
3881
3882 #ifdef EXIF_DEBUG
3883 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Process section(x%02X=%s) @ x%04X + x%04X(=%d)", marker, exif_get_markername(marker), fpos, itemlen, itemlen);
3884 #endif
3885 switch(marker) {
3886 case M_SOS: /* stop before hitting compressed data */
3887 /* If reading entire image is requested, read the rest of the data. */
3888 if (ImageInfo->read_all) {
3889 /* Determine how much file is left. */
3890 fpos = php_stream_tell(ImageInfo->infile);
3891 size = ImageInfo->FileSize - fpos;
3892 sn = exif_file_sections_add(ImageInfo, M_PSEUDO, size, NULL);
3893 Data = ImageInfo->file.list[sn].data;
3894 got = exif_read_from_stream_file_looped(ImageInfo->infile, (char*)Data, size);
3895 if (got != size) {
3896 EXIF_ERRLOG_FILEEOF(ImageInfo)
3897 return false;
3898 }
3899 }
3900 return true;
3901
3902 case M_EOI: /* in case it's a tables-only JPEG stream */
3903 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "No image in jpeg!");
3904 return (ImageInfo->sections_found&(~FOUND_COMPUTED)) ? true : false;
3905
3906 case M_COM: /* Comment section */
3907 exif_process_COM(ImageInfo, (char *)Data, itemlen);
3908 break;
3909
3910 case M_EXIF:
3911 if (!(ImageInfo->sections_found&FOUND_IFD0)) {
3912 /*ImageInfo->sections_found |= FOUND_EXIF;*/
3913 /* Seen files from some 'U-lead' software with Vivitar scanner
3914 that uses marker 31 later in the file (no clue what for!) */
3915 exif_process_APP1(ImageInfo, (char *)Data, itemlen, fpos);
3916 }
3917 break;
3918
3919 case M_APP12:
3920 exif_process_APP12(ImageInfo, (char *)Data, itemlen);
3921 break;
3922
3923
3924 case M_SOF0:
3925 case M_SOF1:
3926 case M_SOF2:
3927 case M_SOF3:
3928 case M_SOF5:
3929 case M_SOF6:
3930 case M_SOF7:
3931 case M_SOF9:
3932 case M_SOF10:
3933 case M_SOF11:
3934 case M_SOF13:
3935 case M_SOF14:
3936 case M_SOF15:
3937 if ((itemlen - 2) < 6) {
3938 return false;
3939 }
3940
3941 exif_process_SOFn(Data, marker, &sof_info);
3942 ImageInfo->Width = sof_info.width;
3943 ImageInfo->Height = sof_info.height;
3944 if (sof_info.num_components == 3) {
3945 ImageInfo->IsColor = 1;
3946 } else {
3947 ImageInfo->IsColor = 0;
3948 }
3949 break;
3950 default:
3951 /* skip any other marker silently. */
3952 break;
3953 }
3954
3955 /* keep track of last marker */
3956 last_marker = marker;
3957 }
3958 #ifdef EXIF_DEBUG
3959 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Done");
3960 #endif
3961 return true;
3962 }
3963 /* }}} */
3964
3965 /* {{{ exif_scan_thumbnail
3966 * scan JPEG in thumbnail (memory) */
exif_scan_thumbnail(image_info_type * ImageInfo)3967 static bool exif_scan_thumbnail(image_info_type *ImageInfo)
3968 {
3969 uchar c, *data = (uchar*)ImageInfo->Thumbnail.data;
3970 int n, marker;
3971 size_t length=2, pos=0;
3972 jpeg_sof_info sof_info;
3973
3974 if (!data || ImageInfo->Thumbnail.size < 4) {
3975 return false; /* nothing to do here */
3976 }
3977 if (memcmp(data, "\xFF\xD8\xFF", 3)) {
3978 if (!ImageInfo->Thumbnail.width && !ImageInfo->Thumbnail.height) {
3979 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Thumbnail is not a JPEG image");
3980 }
3981 return false;
3982 }
3983 for (;;) {
3984 pos += length;
3985 if (pos>=ImageInfo->Thumbnail.size)
3986 return false;
3987 c = data[pos++];
3988 if (pos>=ImageInfo->Thumbnail.size)
3989 return false;
3990 if (c != 0xFF) {
3991 return false;
3992 }
3993 n = 8;
3994 while ((c = data[pos++]) == 0xFF && n--) {
3995 if (pos+3>=ImageInfo->Thumbnail.size)
3996 return false;
3997 /* +3 = pos++ of next check when reaching marker + 2 bytes for length */
3998 }
3999 if (c == 0xFF)
4000 return false;
4001 marker = c;
4002 if (pos>=ImageInfo->Thumbnail.size)
4003 return false;
4004 length = php_jpg_get16(data+pos);
4005 if (length > ImageInfo->Thumbnail.size || pos >= ImageInfo->Thumbnail.size - length) {
4006 return false;
4007 }
4008 #ifdef EXIF_DEBUG
4009 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Thumbnail: process section(x%02X=%s) @ x%04X + x%04X", marker, exif_get_markername(marker), pos, length);
4010 #endif
4011 switch (marker) {
4012 case M_SOF0:
4013 case M_SOF1:
4014 case M_SOF2:
4015 case M_SOF3:
4016 case M_SOF5:
4017 case M_SOF6:
4018 case M_SOF7:
4019 case M_SOF9:
4020 case M_SOF10:
4021 case M_SOF11:
4022 case M_SOF13:
4023 case M_SOF14:
4024 case M_SOF15:
4025 /* handle SOFn block */
4026 if (length < 8 || ImageInfo->Thumbnail.size - 8 < pos) {
4027 /* exif_process_SOFn needs 8 bytes */
4028 return false;
4029 }
4030 exif_process_SOFn(data+pos, marker, &sof_info);
4031 ImageInfo->Thumbnail.height = sof_info.height;
4032 ImageInfo->Thumbnail.width = sof_info.width;
4033 #ifdef EXIF_DEBUG
4034 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Thumbnail: size: %d * %d", sof_info.width, sof_info.height);
4035 #endif
4036 return true;
4037
4038 case M_SOS:
4039 case M_EOI:
4040 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Could not compute size of thumbnail");
4041 return false;
4042 break;
4043
4044 default:
4045 /* just skip */
4046 break;
4047 }
4048 }
4049
4050 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Could not compute size of thumbnail");
4051 return false;
4052 }
4053 /* }}} */
4054
4055 /* {{{ exif_process_IFD_in_TIFF
4056 * Parse the TIFF header; */
exif_process_IFD_in_TIFF_impl(image_info_type * ImageInfo,size_t dir_offset,int section_index)4057 static bool exif_process_IFD_in_TIFF_impl(image_info_type *ImageInfo, size_t dir_offset, int section_index)
4058 {
4059 int i, sn, num_entries, sub_section_index = 0;
4060 unsigned char *dir_entry;
4061 size_t ifd_size, dir_size, entry_offset, next_offset, entry_length, entry_value=0, fgot;
4062 int entry_tag , entry_type;
4063 tag_table_type tag_table = exif_get_tag_table(section_index);
4064
4065 if (ImageInfo->FileSize >= 2 && ImageInfo->FileSize - 2 >= dir_offset) {
4066 sn = exif_file_sections_add(ImageInfo, M_PSEUDO, 2, NULL);
4067 #ifdef EXIF_DEBUG
4068 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Read from TIFF: filesize(x%04X), IFD dir(x%04X + x%04X)", ImageInfo->FileSize, dir_offset, 2);
4069 #endif
4070 php_stream_seek(ImageInfo->infile, dir_offset, SEEK_SET); /* we do not know the order of sections */
4071 if (UNEXPECTED(exif_read_from_stream_file_looped(ImageInfo->infile, (char*)ImageInfo->file.list[sn].data, 2) != 2)) {
4072 return false;
4073 }
4074 num_entries = php_ifd_get16u(ImageInfo->file.list[sn].data, ImageInfo->motorola_intel);
4075 dir_size = 2/*num dir entries*/ +12/*length of entry*/*(size_t)num_entries +4/* offset to next ifd (points to thumbnail or NULL)*/;
4076 if (ImageInfo->FileSize >= dir_size && ImageInfo->FileSize - dir_size >= dir_offset) {
4077 #ifdef EXIF_DEBUG
4078 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Read from TIFF: filesize(x%04X), IFD dir(x%04X + x%04X), IFD entries(%d)", ImageInfo->FileSize, dir_offset+2, dir_size-2, num_entries);
4079 #endif
4080 if (exif_file_sections_realloc(ImageInfo, sn, dir_size)) {
4081 return false;
4082 }
4083 if (UNEXPECTED(exif_read_from_stream_file_looped(ImageInfo->infile, (char*)(ImageInfo->file.list[sn].data+2), dir_size-2) != dir_size - 2)) {
4084 return false;
4085 }
4086 next_offset = php_ifd_get32u(ImageInfo->file.list[sn].data + dir_size - 4, ImageInfo->motorola_intel);
4087 #ifdef EXIF_DEBUG
4088 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Read from TIFF done, next offset x%04X", next_offset);
4089 #endif
4090 /* now we have the directory we can look how long it should be */
4091 ifd_size = dir_size;
4092 for(i=0;i<num_entries;i++) {
4093 dir_entry = ImageInfo->file.list[sn].data+2+i*12;
4094 entry_tag = php_ifd_get16u(dir_entry+0, ImageInfo->motorola_intel);
4095 entry_type = php_ifd_get16u(dir_entry+2, ImageInfo->motorola_intel);
4096 if (entry_type > NUM_FORMATS) {
4097 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Read from TIFF: tag(0x%04X,%12s): Illegal format code 0x%04X, switching to BYTE", entry_tag, exif_get_tagname_debug(entry_tag, tag_table), entry_type);
4098 /* Since this is repeated in exif_process_IFD_TAG make it a notice here */
4099 /* and make it a warning in the exif_process_IFD_TAG which is called */
4100 /* elsewhere. */
4101 entry_type = TAG_FMT_BYTE;
4102 /*The next line would break the image on writeback: */
4103 /* php_ifd_set16u(dir_entry+2, entry_type, ImageInfo->motorola_intel);*/
4104 }
4105 entry_length = php_ifd_get32u(dir_entry+4, ImageInfo->motorola_intel) * php_tiff_bytes_per_format[entry_type];
4106 if (entry_length <= 4) {
4107 switch(entry_type) {
4108 case TAG_FMT_USHORT:
4109 entry_value = php_ifd_get16u(dir_entry+8, ImageInfo->motorola_intel);
4110 break;
4111 case TAG_FMT_SSHORT:
4112 entry_value = php_ifd_get16s(dir_entry+8, ImageInfo->motorola_intel);
4113 break;
4114 case TAG_FMT_ULONG:
4115 entry_value = php_ifd_get32u(dir_entry+8, ImageInfo->motorola_intel);
4116 break;
4117 case TAG_FMT_SLONG:
4118 entry_value = php_ifd_get32s(dir_entry+8, ImageInfo->motorola_intel);
4119 break;
4120 }
4121 switch(entry_tag) {
4122 case TAG_IMAGEWIDTH:
4123 case TAG_COMP_IMAGE_WIDTH:
4124 ImageInfo->Width = entry_value;
4125 break;
4126 case TAG_IMAGEHEIGHT:
4127 case TAG_COMP_IMAGE_HEIGHT:
4128 ImageInfo->Height = entry_value;
4129 break;
4130 case TAG_PHOTOMETRIC_INTERPRETATION:
4131 switch (entry_value) {
4132 case PMI_BLACK_IS_ZERO:
4133 case PMI_WHITE_IS_ZERO:
4134 case PMI_TRANSPARENCY_MASK:
4135 ImageInfo->IsColor = 0;
4136 break;
4137 case PMI_RGB:
4138 case PMI_PALETTE_COLOR:
4139 case PMI_SEPARATED:
4140 case PMI_YCBCR:
4141 case PMI_CIELAB:
4142 ImageInfo->IsColor = 1;
4143 break;
4144 }
4145 break;
4146 }
4147 } else {
4148 entry_offset = php_ifd_get32u(dir_entry+8, ImageInfo->motorola_intel);
4149 /* if entry needs expading ifd cache and entry is at end of current ifd cache. */
4150 /* otherwise there may be huge holes between two entries */
4151 if (entry_offset + entry_length > dir_offset + ifd_size
4152 && entry_offset == dir_offset + ifd_size) {
4153 ifd_size = entry_offset + entry_length - dir_offset;
4154 #ifdef EXIF_DEBUG
4155 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Resize struct: x%04X + x%04X - x%04X = x%04X", entry_offset, entry_length, dir_offset, ifd_size);
4156 #endif
4157 }
4158 }
4159 }
4160 if (ImageInfo->FileSize >= ImageInfo->file.list[sn].size && ImageInfo->FileSize - ImageInfo->file.list[sn].size >= dir_offset) {
4161 if (ifd_size > dir_size) {
4162 if (ImageInfo->FileSize < ifd_size || dir_offset > ImageInfo->FileSize - ifd_size) {
4163 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Error in TIFF: filesize(x%04X) less than size of IFD(x%04X + x%04X)", ImageInfo->FileSize, dir_offset, ifd_size);
4164 return false;
4165 }
4166 if (exif_file_sections_realloc(ImageInfo, sn, ifd_size)) {
4167 return false;
4168 }
4169 /* read values not stored in directory itself */
4170 #ifdef EXIF_DEBUG
4171 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Read from TIFF: filesize(x%04X), IFD(x%04X + x%04X)", ImageInfo->FileSize, dir_offset, ifd_size);
4172 #endif
4173 exif_read_from_stream_file_looped(ImageInfo->infile, (char*)(ImageInfo->file.list[sn].data+dir_size), ifd_size-dir_size);
4174 #ifdef EXIF_DEBUG
4175 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Read from TIFF, done");
4176 #endif
4177 }
4178 /* now process the tags */
4179 for(i=0;i<num_entries;i++) {
4180 dir_entry = ImageInfo->file.list[sn].data+2+i*12;
4181 entry_tag = php_ifd_get16u(dir_entry+0, ImageInfo->motorola_intel);
4182 entry_type = php_ifd_get16u(dir_entry+2, ImageInfo->motorola_intel);
4183 /*entry_length = php_ifd_get32u(dir_entry+4, ImageInfo->motorola_intel);*/
4184 if (entry_tag == TAG_EXIF_IFD_POINTER ||
4185 entry_tag == TAG_INTEROP_IFD_POINTER ||
4186 entry_tag == TAG_GPS_IFD_POINTER ||
4187 entry_tag == TAG_SUB_IFD
4188 ) {
4189 switch(entry_tag) {
4190 case TAG_EXIF_IFD_POINTER:
4191 ImageInfo->sections_found |= FOUND_EXIF;
4192 sub_section_index = SECTION_EXIF;
4193 break;
4194 case TAG_GPS_IFD_POINTER:
4195 ImageInfo->sections_found |= FOUND_GPS;
4196 sub_section_index = SECTION_GPS;
4197 break;
4198 case TAG_INTEROP_IFD_POINTER:
4199 ImageInfo->sections_found |= FOUND_INTEROP;
4200 sub_section_index = SECTION_INTEROP;
4201 break;
4202 case TAG_SUB_IFD:
4203 ImageInfo->sections_found |= FOUND_THUMBNAIL;
4204 sub_section_index = SECTION_THUMBNAIL;
4205 break;
4206 }
4207 entry_offset = php_ifd_get32u(dir_entry+8, ImageInfo->motorola_intel);
4208 #ifdef EXIF_DEBUG
4209 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Next IFD: %s @0x%04X", exif_get_sectionname(sub_section_index), entry_offset);
4210 #endif
4211 exif_process_IFD_in_TIFF(ImageInfo, entry_offset, sub_section_index);
4212 if (section_index!=SECTION_THUMBNAIL && entry_tag==TAG_SUB_IFD) {
4213 if (ImageInfo->Thumbnail.filetype != IMAGE_FILETYPE_UNKNOWN
4214 && ImageInfo->Thumbnail.size
4215 && ImageInfo->Thumbnail.offset
4216 && ImageInfo->read_thumbnail
4217 ) {
4218 #ifdef EXIF_DEBUG
4219 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "%s THUMBNAIL @0x%04X + 0x%04X", ImageInfo->Thumbnail.data ? "Ignore" : "Read", ImageInfo->Thumbnail.offset, ImageInfo->Thumbnail.size);
4220 #endif
4221 if (!ImageInfo->Thumbnail.data) {
4222 ImageInfo->Thumbnail.data = safe_emalloc(ImageInfo->Thumbnail.size, 1, 0);
4223 php_stream_seek(ImageInfo->infile, ImageInfo->Thumbnail.offset, SEEK_SET);
4224 fgot = exif_read_from_stream_file_looped(ImageInfo->infile, ImageInfo->Thumbnail.data, ImageInfo->Thumbnail.size);
4225 if (fgot != ImageInfo->Thumbnail.size) {
4226 EXIF_ERRLOG_THUMBEOF(ImageInfo)
4227 efree(ImageInfo->Thumbnail.data);
4228
4229 ImageInfo->Thumbnail.data = NULL;
4230 } else {
4231 exif_thumbnail_build(ImageInfo);
4232 }
4233 }
4234 }
4235 }
4236 #ifdef EXIF_DEBUG
4237 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Next IFD: %s done", exif_get_sectionname(sub_section_index));
4238 #endif
4239 } else {
4240 exif_offset_info info;
4241 exif_offset_info_init(&info,
4242 (char *) (ImageInfo->file.list[sn].data - dir_offset),
4243 (char *) ImageInfo->file.list[sn].data, ifd_size);
4244 if (!exif_process_IFD_TAG(ImageInfo, (char*)dir_entry, &info,
4245 0, section_index, 0, tag_table)) {
4246 return false;
4247 }
4248 }
4249 }
4250 /* If we had a thumbnail in a SUB_IFD we have ANOTHER image in NEXT IFD */
4251 if (next_offset && section_index != SECTION_THUMBNAIL) {
4252 /* this should be a thumbnail IFD */
4253 /* the thumbnail itself is stored at Tag=StripOffsets */
4254 #ifdef EXIF_DEBUG
4255 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Read next IFD (THUMBNAIL) at x%04X", next_offset);
4256 #endif
4257 exif_process_IFD_in_TIFF(ImageInfo, next_offset, SECTION_THUMBNAIL);
4258 #ifdef EXIF_DEBUG
4259 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "%s THUMBNAIL @0x%04X + 0x%04X", ImageInfo->Thumbnail.data ? "Ignore" : "Read", ImageInfo->Thumbnail.offset, ImageInfo->Thumbnail.size);
4260 #endif
4261 if (!ImageInfo->Thumbnail.data && ImageInfo->Thumbnail.offset && ImageInfo->Thumbnail.size && ImageInfo->read_thumbnail) {
4262 ImageInfo->Thumbnail.data = safe_emalloc(ImageInfo->Thumbnail.size, 1, 0);
4263 php_stream_seek(ImageInfo->infile, ImageInfo->Thumbnail.offset, SEEK_SET);
4264 fgot = exif_read_from_stream_file_looped(ImageInfo->infile, ImageInfo->Thumbnail.data, ImageInfo->Thumbnail.size);
4265 if (fgot != ImageInfo->Thumbnail.size) {
4266 EXIF_ERRLOG_THUMBEOF(ImageInfo)
4267 efree(ImageInfo->Thumbnail.data);
4268 ImageInfo->Thumbnail.data = NULL;
4269 } else {
4270 exif_thumbnail_build(ImageInfo);
4271 }
4272 }
4273 #ifdef EXIF_DEBUG
4274 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Read next IFD (THUMBNAIL) done");
4275 #endif
4276 }
4277 return true;
4278 } else {
4279 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Error in TIFF: filesize(x%04X) less than size of IFD(x%04X)", ImageInfo->FileSize, dir_offset+ImageInfo->file.list[sn].size);
4280 return false;
4281 }
4282 } else {
4283 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Error in TIFF: filesize(x%04X) less than size of IFD dir(x%04X)", ImageInfo->FileSize, dir_offset+dir_size);
4284 return false;
4285 }
4286 } else {
4287 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Error in TIFF: filesize(x%04X) less than start of IFD dir(x%04X)", ImageInfo->FileSize, dir_offset+2);
4288 return false;
4289 }
4290 }
4291 /* }}} */
4292
exif_process_IFD_in_TIFF(image_info_type * ImageInfo,size_t dir_offset,int section_index)4293 static bool exif_process_IFD_in_TIFF(image_info_type *ImageInfo, size_t dir_offset, int section_index)
4294 {
4295 bool result;
4296 if (ImageInfo->ifd_count++ > MAX_IFD_TAGS) {
4297 return false;
4298 }
4299 if (ImageInfo->ifd_nesting_level > MAX_IFD_NESTING_LEVEL) {
4300 return false;
4301 }
4302 ImageInfo->ifd_nesting_level++;
4303 result = exif_process_IFD_in_TIFF_impl(ImageInfo, dir_offset, section_index);
4304 ImageInfo->ifd_nesting_level--;
4305 return result;
4306 }
4307
4308 /* {{{ exif_scan_FILE_header
4309 * Parse the marker stream until SOS or EOI is seen; */
exif_scan_FILE_header(image_info_type * ImageInfo)4310 static bool exif_scan_FILE_header(image_info_type *ImageInfo)
4311 {
4312 unsigned char file_header[8];
4313 bool ret = false;
4314
4315 ImageInfo->FileType = IMAGE_FILETYPE_UNKNOWN;
4316
4317 if (ImageInfo->FileSize >= 2) {
4318 php_stream_seek(ImageInfo->infile, 0, SEEK_SET);
4319 if (exif_read_from_stream_file_looped(ImageInfo->infile, (char*)file_header, 2) != 2) {
4320 return false;
4321 }
4322 if ((file_header[0]==0xff) && (file_header[1]==M_SOI)) {
4323 ImageInfo->FileType = IMAGE_FILETYPE_JPEG;
4324 if (exif_scan_JPEG_header(ImageInfo)) {
4325 ret = true;
4326 } else {
4327 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Invalid JPEG file");
4328 }
4329 } else if (ImageInfo->FileSize >= 8) {
4330 if (exif_read_from_stream_file_looped(ImageInfo->infile, (char*)(file_header+2), 6) != 6) {
4331 return false;
4332 }
4333 if (!memcmp(file_header, "II\x2A\x00", 4)) {
4334 ImageInfo->FileType = IMAGE_FILETYPE_TIFF_II;
4335 ImageInfo->motorola_intel = 0;
4336 #ifdef EXIF_DEBUG
4337 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "File has TIFF/II format");
4338 #endif
4339 ImageInfo->sections_found |= FOUND_IFD0;
4340 if (exif_process_IFD_in_TIFF(ImageInfo,
4341 php_ifd_get32u(file_header + 4, ImageInfo->motorola_intel),
4342 SECTION_IFD0)) {
4343 ret = true;
4344 } else {
4345 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Invalid TIFF file");
4346 }
4347 } else if (!memcmp(file_header, "MM\x00\x2a", 4)) {
4348 ImageInfo->FileType = IMAGE_FILETYPE_TIFF_MM;
4349 ImageInfo->motorola_intel = 1;
4350 #ifdef EXIF_DEBUG
4351 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "File has TIFF/MM format");
4352 #endif
4353 ImageInfo->sections_found |= FOUND_IFD0;
4354 if (exif_process_IFD_in_TIFF(ImageInfo,
4355 php_ifd_get32u(file_header + 4, ImageInfo->motorola_intel),
4356 SECTION_IFD0)) {
4357 ret = true;
4358 } else {
4359 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Invalid TIFF file");
4360 }
4361 } else {
4362 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "File not supported");
4363 return false;
4364 }
4365 }
4366 } else {
4367 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "File too small (%d)", ImageInfo->FileSize);
4368 }
4369 return ret;
4370 }
4371 /* }}} */
4372
4373 /* {{{ exif_discard_imageinfo
4374 Discard data scanned by exif_read_file.
4375 */
exif_discard_imageinfo(image_info_type * ImageInfo)4376 static bool exif_discard_imageinfo(image_info_type *ImageInfo)
4377 {
4378 int i;
4379
4380 EFREE_IF(ImageInfo->FileName);
4381 EFREE_IF(ImageInfo->UserComment);
4382 EFREE_IF(ImageInfo->UserCommentEncoding);
4383 EFREE_IF(ImageInfo->Copyright);
4384 EFREE_IF(ImageInfo->CopyrightPhotographer);
4385 EFREE_IF(ImageInfo->CopyrightEditor);
4386 EFREE_IF(ImageInfo->Thumbnail.data);
4387 EFREE_IF(ImageInfo->encode_unicode);
4388 EFREE_IF(ImageInfo->decode_unicode_be);
4389 EFREE_IF(ImageInfo->decode_unicode_le);
4390 EFREE_IF(ImageInfo->encode_jis);
4391 EFREE_IF(ImageInfo->decode_jis_be);
4392 EFREE_IF(ImageInfo->decode_jis_le);
4393 EFREE_IF(ImageInfo->make);
4394 EFREE_IF(ImageInfo->model);
4395 for (i=0; i<ImageInfo->xp_fields.count; i++) {
4396 EFREE_IF(ImageInfo->xp_fields.list[i].value);
4397 }
4398 EFREE_IF(ImageInfo->xp_fields.list);
4399 for (i=0; i<SECTION_COUNT; i++) {
4400 exif_iif_free(ImageInfo, i);
4401 }
4402 exif_file_sections_free(ImageInfo);
4403 memset(ImageInfo, 0, sizeof(*ImageInfo));
4404 return true;
4405 }
4406 /* }}} */
4407
4408 /* {{{ exif_read_from_impl */
exif_read_from_impl(image_info_type * ImageInfo,php_stream * stream,int read_thumbnail,int read_all)4409 static bool exif_read_from_impl(image_info_type *ImageInfo, php_stream *stream, int read_thumbnail, int read_all)
4410 {
4411 bool ret;
4412 zend_stat_t st;
4413
4414 /* Start with an empty image information structure. */
4415 memset(ImageInfo, 0, sizeof(*ImageInfo));
4416
4417 ImageInfo->motorola_intel = -1; /* flag as unknown */
4418 ImageInfo->infile = stream;
4419 ImageInfo->FileName = NULL;
4420
4421 if (php_stream_is(ImageInfo->infile, PHP_STREAM_IS_STDIO)) {
4422 if (VCWD_STAT(stream->orig_path, &st) >= 0) {
4423 zend_string *base;
4424 if ((st.st_mode & S_IFMT) != S_IFREG) {
4425 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Not a file");
4426 ImageInfo->infile = NULL;
4427 return false;
4428 }
4429
4430 /* Store file name */
4431 base = php_basename(stream->orig_path, strlen(stream->orig_path), NULL, 0);
4432 ImageInfo->FileName = estrndup(ZSTR_VAL(base), ZSTR_LEN(base));
4433
4434 zend_string_release_ex(base, 0);
4435
4436 /* Store file date/time. */
4437 ImageInfo->FileDateTime = st.st_mtime;
4438 ImageInfo->FileSize = st.st_size;
4439 }
4440 } else {
4441 if (!ImageInfo->FileSize) {
4442 php_stream_seek(ImageInfo->infile, 0, SEEK_END);
4443 ImageInfo->FileSize = php_stream_tell(ImageInfo->infile);
4444 php_stream_seek(ImageInfo->infile, 0, SEEK_SET);
4445 }
4446 }
4447
4448 ImageInfo->read_thumbnail = read_thumbnail;
4449 ImageInfo->read_all = read_all;
4450 ImageInfo->Thumbnail.filetype = IMAGE_FILETYPE_UNKNOWN;
4451
4452 ImageInfo->encode_unicode = estrdup(EXIF_G(encode_unicode));
4453 ImageInfo->decode_unicode_be = estrdup(EXIF_G(decode_unicode_be));
4454 ImageInfo->decode_unicode_le = estrdup(EXIF_G(decode_unicode_le));
4455 ImageInfo->encode_jis = estrdup(EXIF_G(encode_jis));
4456 ImageInfo->decode_jis_be = estrdup(EXIF_G(decode_jis_be));
4457 ImageInfo->decode_jis_le = estrdup(EXIF_G(decode_jis_le));
4458
4459
4460 ImageInfo->ifd_nesting_level = 0;
4461 ImageInfo->ifd_count = 0;
4462 ImageInfo->num_errors = 0;
4463
4464 /* Scan the headers */
4465 ret = exif_scan_FILE_header(ImageInfo);
4466
4467 return ret;
4468 }
4469 /* }}} */
4470
4471 /* {{{ exif_read_from_stream */
exif_read_from_stream(image_info_type * ImageInfo,php_stream * stream,int read_thumbnail,int read_all)4472 static bool exif_read_from_stream(image_info_type *ImageInfo, php_stream *stream, int read_thumbnail, int read_all)
4473 {
4474 bool ret;
4475 off_t old_pos = php_stream_tell(stream);
4476
4477 if (old_pos) {
4478 php_stream_seek(stream, 0, SEEK_SET);
4479 }
4480
4481 ret = exif_read_from_impl(ImageInfo, stream, read_thumbnail, read_all);
4482
4483 if (old_pos) {
4484 php_stream_seek(stream, old_pos, SEEK_SET);
4485 }
4486
4487 return ret;
4488 }
4489 /* }}} */
4490
4491 /* {{{ exif_read_from_file */
exif_read_from_file(image_info_type * ImageInfo,char * FileName,int read_thumbnail,int read_all)4492 static bool exif_read_from_file(image_info_type *ImageInfo, char *FileName, int read_thumbnail, int read_all)
4493 {
4494 bool ret;
4495 php_stream *stream;
4496
4497 stream = php_stream_open_wrapper(FileName, "rb", STREAM_MUST_SEEK | IGNORE_PATH, NULL);
4498
4499 if (!stream) {
4500 memset(&ImageInfo, 0, sizeof(ImageInfo));
4501
4502 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Unable to open file");
4503
4504 return false;
4505 }
4506
4507 ret = exif_read_from_stream(ImageInfo, stream, read_thumbnail, read_all);
4508
4509 php_stream_close(stream);
4510
4511 return ret;
4512 }
4513 /* }}} */
4514
4515 /* {{{ Reads header data from an image and optionally reads the internal thumbnails */
PHP_FUNCTION(exif_read_data)4516 PHP_FUNCTION(exif_read_data)
4517 {
4518 zend_string *z_sections_needed = NULL;
4519 bool sub_arrays = 0, read_thumbnail = 0, read_all = 0;
4520 zval *stream;
4521 bool ret;
4522 int i, sections_needed = 0;
4523 image_info_type ImageInfo;
4524 char tmp[64], *sections_str, *s;
4525
4526 /* Parse arguments */
4527 ZEND_PARSE_PARAMETERS_START(1, 4)
4528 Z_PARAM_ZVAL(stream)
4529 Z_PARAM_OPTIONAL
4530 Z_PARAM_STR_OR_NULL(z_sections_needed)
4531 Z_PARAM_BOOL(sub_arrays)
4532 Z_PARAM_BOOL(read_thumbnail)
4533 ZEND_PARSE_PARAMETERS_END();
4534
4535 memset(&ImageInfo, 0, sizeof(ImageInfo));
4536
4537 if (z_sections_needed) {
4538 spprintf(§ions_str, 0, ",%s,", ZSTR_VAL(z_sections_needed));
4539 /* sections_str DOES start with , and SPACES are NOT allowed in names */
4540 s = sections_str;
4541 while (*++s) {
4542 if (*s == ' ') {
4543 *s = ',';
4544 }
4545 }
4546
4547 for (i = 0; i < SECTION_COUNT; i++) {
4548 snprintf(tmp, sizeof(tmp), ",%s,", exif_get_sectionname(i));
4549 if (strstr(sections_str, tmp)) {
4550 sections_needed |= 1<<i;
4551 }
4552 }
4553 EFREE_IF(sections_str);
4554 /* now see what we need */
4555 #ifdef EXIF_DEBUG
4556 sections_str = exif_get_sectionlist(sections_needed);
4557 if (!sections_str) {
4558 RETURN_FALSE;
4559 }
4560 exif_error_docref(NULL EXIFERR_CC, &ImageInfo, E_NOTICE, "Sections needed: %s", sections_str[0] ? sections_str : "None");
4561 EFREE_IF(sections_str);
4562 #endif
4563 }
4564
4565 if (Z_TYPE_P(stream) == IS_RESOURCE) {
4566 php_stream *p_stream = NULL;
4567
4568 php_stream_from_res(p_stream, Z_RES_P(stream));
4569
4570 ret = exif_read_from_stream(&ImageInfo, p_stream, read_thumbnail, read_all);
4571 } else {
4572 if (!try_convert_to_string(stream)) {
4573 RETURN_THROWS();
4574 }
4575
4576 if (!Z_STRLEN_P(stream)) {
4577 zend_argument_value_error(1, "cannot be empty");
4578 RETURN_THROWS();
4579 }
4580
4581 if (CHECK_NULL_PATH(Z_STRVAL_P(stream), Z_STRLEN_P(stream))) {
4582 zend_argument_value_error(1, "must not contain any null bytes");
4583 RETURN_THROWS();
4584 }
4585
4586 ret = exif_read_from_file(&ImageInfo, Z_STRVAL_P(stream), read_thumbnail, read_all);
4587 }
4588
4589 sections_str = exif_get_sectionlist(ImageInfo.sections_found);
4590
4591 #ifdef EXIF_DEBUG
4592 if (sections_str) {
4593 exif_error_docref(NULL EXIFERR_CC, &ImageInfo, E_NOTICE, "Sections found: %s", sections_str[0] ? sections_str : "None");
4594 }
4595 #endif
4596
4597 ImageInfo.sections_found |= FOUND_COMPUTED|FOUND_FILE;/* do not inform about in debug*/
4598
4599 if (ret == false || (sections_needed && !(sections_needed&ImageInfo.sections_found))) {
4600 /* array_init must be checked at last! otherwise the array must be freed if a later test fails. */
4601 exif_discard_imageinfo(&ImageInfo);
4602 EFREE_IF(sections_str);
4603 RETURN_FALSE;
4604 }
4605
4606 array_init(return_value);
4607
4608 #ifdef EXIF_DEBUG
4609 exif_error_docref(NULL EXIFERR_CC, &ImageInfo, E_NOTICE, "Generate section FILE");
4610 #endif
4611
4612 /* now we can add our information */
4613 exif_iif_add_str(&ImageInfo, SECTION_FILE, "FileName", ImageInfo.FileName);
4614 exif_iif_add_int(&ImageInfo, SECTION_FILE, "FileDateTime", ImageInfo.FileDateTime);
4615 exif_iif_add_int(&ImageInfo, SECTION_FILE, "FileSize", ImageInfo.FileSize);
4616 exif_iif_add_int(&ImageInfo, SECTION_FILE, "FileType", ImageInfo.FileType);
4617 exif_iif_add_str(&ImageInfo, SECTION_FILE, "MimeType", (char*)php_image_type_to_mime_type(ImageInfo.FileType));
4618 exif_iif_add_str(&ImageInfo, SECTION_FILE, "SectionsFound", sections_str ? sections_str : "NONE");
4619
4620 #ifdef EXIF_DEBUG
4621 exif_error_docref(NULL EXIFERR_CC, &ImageInfo, E_NOTICE, "Generate section COMPUTED");
4622 #endif
4623
4624 if (ImageInfo.Width>0 && ImageInfo.Height>0) {
4625 exif_iif_add_fmt(&ImageInfo, SECTION_COMPUTED, "html" , "width=\"%d\" height=\"%d\"", ImageInfo.Width, ImageInfo.Height);
4626 exif_iif_add_int(&ImageInfo, SECTION_COMPUTED, "Height", ImageInfo.Height);
4627 exif_iif_add_int(&ImageInfo, SECTION_COMPUTED, "Width", ImageInfo.Width);
4628 }
4629 exif_iif_add_int(&ImageInfo, SECTION_COMPUTED, "IsColor", ImageInfo.IsColor);
4630 if (ImageInfo.motorola_intel != -1) {
4631 exif_iif_add_int(&ImageInfo, SECTION_COMPUTED, "ByteOrderMotorola", ImageInfo.motorola_intel);
4632 }
4633 if (ImageInfo.FocalLength) {
4634 exif_iif_add_fmt(&ImageInfo, SECTION_COMPUTED, "FocalLength", "%4.1Fmm", ImageInfo.FocalLength);
4635 if(ImageInfo.CCDWidth) {
4636 exif_iif_add_fmt(&ImageInfo, SECTION_COMPUTED, "35mmFocalLength", "%dmm", (int)(ImageInfo.FocalLength/ImageInfo.CCDWidth*35+0.5));
4637 }
4638 }
4639 if(ImageInfo.CCDWidth) {
4640 exif_iif_add_fmt(&ImageInfo, SECTION_COMPUTED, "CCDWidth", "%dmm", (int)ImageInfo.CCDWidth);
4641 }
4642 if(ImageInfo.ExposureTime>0) {
4643 float recip_exposure_time = 0.5f + 1.0f/ImageInfo.ExposureTime;
4644 if (ImageInfo.ExposureTime <= 0.5 && recip_exposure_time < (float)INT_MAX) {
4645 exif_iif_add_fmt(&ImageInfo, SECTION_COMPUTED, "ExposureTime", "%0.3F s (1/%d)", ImageInfo.ExposureTime, (int) recip_exposure_time);
4646 } else {
4647 exif_iif_add_fmt(&ImageInfo, SECTION_COMPUTED, "ExposureTime", "%0.3F s", ImageInfo.ExposureTime);
4648 }
4649 }
4650 if(ImageInfo.ApertureFNumber) {
4651 exif_iif_add_fmt(&ImageInfo, SECTION_COMPUTED, "ApertureFNumber", "f/%.1F", ImageInfo.ApertureFNumber);
4652 }
4653 if(ImageInfo.Distance) {
4654 if(ImageInfo.Distance<0) {
4655 exif_iif_add_str(&ImageInfo, SECTION_COMPUTED, "FocusDistance", "Infinite");
4656 } else {
4657 exif_iif_add_fmt(&ImageInfo, SECTION_COMPUTED, "FocusDistance", "%0.2Fm", ImageInfo.Distance);
4658 }
4659 }
4660 if (ImageInfo.UserComment) {
4661 exif_iif_add_buffer(&ImageInfo, SECTION_COMPUTED, "UserComment", ImageInfo.UserCommentLength, ImageInfo.UserComment);
4662 if (ImageInfo.UserCommentEncoding && strlen(ImageInfo.UserCommentEncoding)) {
4663 exif_iif_add_str(&ImageInfo, SECTION_COMPUTED, "UserCommentEncoding", ImageInfo.UserCommentEncoding);
4664 }
4665 }
4666
4667 exif_iif_add_str(&ImageInfo, SECTION_COMPUTED, "Copyright", ImageInfo.Copyright);
4668 exif_iif_add_str(&ImageInfo, SECTION_COMPUTED, "Copyright.Photographer", ImageInfo.CopyrightPhotographer);
4669 exif_iif_add_str(&ImageInfo, SECTION_COMPUTED, "Copyright.Editor", ImageInfo.CopyrightEditor);
4670
4671 for (i=0; i<ImageInfo.xp_fields.count; i++) {
4672 exif_iif_add_str(&ImageInfo, SECTION_WINXP, exif_get_tagname_debug(ImageInfo.xp_fields.list[i].tag, exif_get_tag_table(SECTION_WINXP)), ImageInfo.xp_fields.list[i].value);
4673 }
4674 if (ImageInfo.Thumbnail.size) {
4675 if (read_thumbnail) {
4676 /* not exif_iif_add_str : this is a buffer */
4677 exif_iif_add_tag(&ImageInfo, SECTION_THUMBNAIL, "THUMBNAIL", TAG_NONE, TAG_FMT_UNDEFINED, ImageInfo.Thumbnail.size, ImageInfo.Thumbnail.data, ImageInfo.Thumbnail.size);
4678 }
4679 if (!ImageInfo.Thumbnail.width || !ImageInfo.Thumbnail.height) {
4680 /* try to evaluate if thumbnail data is present */
4681 exif_scan_thumbnail(&ImageInfo);
4682 }
4683 exif_iif_add_int(&ImageInfo, SECTION_COMPUTED, "Thumbnail.FileType", ImageInfo.Thumbnail.filetype);
4684 exif_iif_add_str(&ImageInfo, SECTION_COMPUTED, "Thumbnail.MimeType", (char*)php_image_type_to_mime_type(ImageInfo.Thumbnail.filetype));
4685 }
4686 if (ImageInfo.Thumbnail.width && ImageInfo.Thumbnail.height) {
4687 exif_iif_add_int(&ImageInfo, SECTION_COMPUTED, "Thumbnail.Height", ImageInfo.Thumbnail.height);
4688 exif_iif_add_int(&ImageInfo, SECTION_COMPUTED, "Thumbnail.Width", ImageInfo.Thumbnail.width);
4689 }
4690 EFREE_IF(sections_str);
4691
4692 #ifdef EXIF_DEBUG
4693 exif_error_docref(NULL EXIFERR_CC, &ImageInfo, E_NOTICE, "Adding image infos");
4694 #endif
4695
4696 add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_FILE );
4697 add_assoc_image_info(return_value, 1, &ImageInfo, SECTION_COMPUTED );
4698 add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_ANY_TAG );
4699 add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_IFD0 );
4700 add_assoc_image_info(return_value, 1, &ImageInfo, SECTION_THUMBNAIL );
4701 add_assoc_image_info(return_value, 1, &ImageInfo, SECTION_COMMENT );
4702 add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_EXIF );
4703 add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_GPS );
4704 add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_INTEROP );
4705 add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_FPIX );
4706 add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_APP12 );
4707 add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_WINXP );
4708 add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_MAKERNOTE );
4709
4710 #ifdef EXIF_DEBUG
4711 exif_error_docref(NULL EXIFERR_CC, &ImageInfo, E_NOTICE, "Discarding info");
4712 #endif
4713
4714 exif_discard_imageinfo(&ImageInfo);
4715
4716 #ifdef EXIF_DEBUG
4717 php_error_docref1(NULL, (Z_TYPE_P(stream) == IS_RESOURCE ? "<stream>" : Z_STRVAL_P(stream)), E_NOTICE, "Done");
4718 #endif
4719 }
4720 /* }}} */
4721
4722 /* {{{ Reads the embedded thumbnail */
PHP_FUNCTION(exif_thumbnail)4723 PHP_FUNCTION(exif_thumbnail)
4724 {
4725 bool ret;
4726 int arg_c = ZEND_NUM_ARGS();
4727 image_info_type ImageInfo;
4728 zval *stream;
4729 zval *z_width = NULL, *z_height = NULL, *z_imagetype = NULL;
4730
4731 /* Parse arguments */
4732 ZEND_PARSE_PARAMETERS_START(1, 4)
4733 Z_PARAM_ZVAL(stream)
4734 Z_PARAM_OPTIONAL
4735 Z_PARAM_ZVAL(z_width)
4736 Z_PARAM_ZVAL(z_height)
4737 Z_PARAM_ZVAL(z_imagetype)
4738 ZEND_PARSE_PARAMETERS_END();
4739
4740 memset(&ImageInfo, 0, sizeof(ImageInfo));
4741
4742 if (Z_TYPE_P(stream) == IS_RESOURCE) {
4743 php_stream *p_stream = NULL;
4744
4745 php_stream_from_res(p_stream, Z_RES_P(stream));
4746
4747 ret = exif_read_from_stream(&ImageInfo, p_stream, 1, 0);
4748 } else {
4749 if (!try_convert_to_string(stream)) {
4750 RETURN_THROWS();
4751 }
4752
4753 if (!Z_STRLEN_P(stream)) {
4754 zend_argument_value_error(1, "cannot be empty");
4755 RETURN_THROWS();
4756 }
4757
4758 if (CHECK_NULL_PATH(Z_STRVAL_P(stream), Z_STRLEN_P(stream))) {
4759 zend_argument_value_error(1, "must not contain any null bytes");
4760 RETURN_THROWS();
4761 }
4762
4763 ret = exif_read_from_file(&ImageInfo, Z_STRVAL_P(stream), 1, 0);
4764 }
4765
4766 if (ret == false) {
4767 exif_discard_imageinfo(&ImageInfo);
4768 RETURN_FALSE;
4769 }
4770
4771 #ifdef EXIF_DEBUG
4772 exif_error_docref(NULL EXIFERR_CC, &ImageInfo, E_NOTICE, "Thumbnail data %d %d %d, %d x %d", ImageInfo.Thumbnail.data, ImageInfo.Thumbnail.size, ImageInfo.Thumbnail.filetype, ImageInfo.Thumbnail.width, ImageInfo.Thumbnail.height);
4773 #endif
4774 if (!ImageInfo.Thumbnail.data || !ImageInfo.Thumbnail.size) {
4775 exif_discard_imageinfo(&ImageInfo);
4776 RETURN_FALSE;
4777 }
4778
4779 #ifdef EXIF_DEBUG
4780 exif_error_docref(NULL EXIFERR_CC, &ImageInfo, E_NOTICE, "Returning thumbnail(%d)", ImageInfo.Thumbnail.size);
4781 #endif
4782
4783 ZVAL_STRINGL(return_value, ImageInfo.Thumbnail.data, ImageInfo.Thumbnail.size);
4784 if (arg_c >= 3) {
4785 if (!ImageInfo.Thumbnail.width || !ImageInfo.Thumbnail.height) {
4786 if (!exif_scan_thumbnail(&ImageInfo)) {
4787 ImageInfo.Thumbnail.width = ImageInfo.Thumbnail.height = 0;
4788 }
4789 }
4790 ZEND_TRY_ASSIGN_REF_LONG(z_width, ImageInfo.Thumbnail.width);
4791 ZEND_TRY_ASSIGN_REF_LONG(z_height, ImageInfo.Thumbnail.height);
4792 }
4793 if (arg_c >= 4) {
4794 ZEND_TRY_ASSIGN_REF_LONG(z_imagetype, ImageInfo.Thumbnail.filetype);
4795 }
4796
4797 #ifdef EXIF_DEBUG
4798 exif_error_docref(NULL EXIFERR_CC, &ImageInfo, E_NOTICE, "Discarding info");
4799 #endif
4800
4801 exif_discard_imageinfo(&ImageInfo);
4802
4803 #ifdef EXIF_DEBUG
4804 php_error_docref1(NULL, (Z_TYPE_P(stream) == IS_RESOURCE ? "<stream>" : Z_STRVAL_P(stream)), E_NOTICE, "Done");
4805 #endif
4806 }
4807 /* }}} */
4808
4809 /* {{{ Get the type of an image */
PHP_FUNCTION(exif_imagetype)4810 PHP_FUNCTION(exif_imagetype)
4811 {
4812 char *imagefile;
4813 size_t imagefile_len;
4814 php_stream * stream;
4815 int itype = 0;
4816
4817 if (zend_parse_parameters(ZEND_NUM_ARGS(), "p", &imagefile, &imagefile_len) == FAILURE) {
4818 RETURN_THROWS();
4819 }
4820
4821 stream = php_stream_open_wrapper(imagefile, "rb", IGNORE_PATH|REPORT_ERRORS, NULL);
4822
4823 if (stream == NULL) {
4824 RETURN_FALSE;
4825 }
4826
4827 itype = php_getimagetype(stream, imagefile, NULL);
4828
4829 php_stream_close(stream);
4830
4831 if (itype == IMAGE_FILETYPE_UNKNOWN) {
4832 RETURN_FALSE;
4833 } else {
4834 ZVAL_LONG(return_value, itype);
4835 }
4836 }
4837 /* }}} */
4838
