1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 7 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1997-2018 The PHP Group |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 3.01 of the PHP license, |
8 | that is bundled with this package in the file LICENSE, and is |
9 | available through the world-wide-web at the following url: |
10 | http://www.php.net/license/3_01.txt |
11 | If you did not receive a copy of the PHP license and are unable to |
12 | obtain it through the world-wide-web, please send a note to |
13 | license@php.net so we can mail you a copy immediately. |
14 +----------------------------------------------------------------------+
15 | Author: Thies C. Arntzen <thies@thieso.net> |
16 +----------------------------------------------------------------------+
17 */
18
19 /* $Id$ */
20
21 /*
22 * Functions to parse & compse IPTC data.
23 * PhotoShop >= 3.0 can read and write textual data to JPEG files.
24 * ... more to come .....
25 *
26 * i know, parts of this is now duplicated in image.c
27 * but in this case i think it's okay!
28 */
29
30 /*
31 * TODO:
32 * - add IPTC translation table
33 */
34
35 #include "php.h"
36 #include "php_iptc.h"
37 #include "ext/standard/head.h"
38
39 #include <sys/stat.h>
40
41 #ifdef PHP_WIN32
42 # include "win32/php_stdint.h"
43 #else
44 # if HAVE_INTTYPES_H
45 # include <inttypes.h>
46 # elif HAVE_STDINT_H
47 # include <stdint.h>
48 # endif
49 #endif
50
51 /* some defines for the different JPEG block types */
52 #define M_SOF0 0xC0 /* Start Of Frame N */
53 #define M_SOF1 0xC1 /* N indicates which compression process */
54 #define M_SOF2 0xC2 /* Only SOF0-SOF2 are now in common use */
55 #define M_SOF3 0xC3
56 #define M_SOF5 0xC5 /* NB: codes C4 and CC are NOT SOF markers */
57 #define M_SOF6 0xC6
58 #define M_SOF7 0xC7
59 #define M_SOF9 0xC9
60 #define M_SOF10 0xCA
61 #define M_SOF11 0xCB
62 #define M_SOF13 0xCD
63 #define M_SOF14 0xCE
64 #define M_SOF15 0xCF
65 #define M_SOI 0xD8
66 #define M_EOI 0xD9 /* End Of Image (end of datastream) */
67 #define M_SOS 0xDA /* Start Of Scan (begins compressed data) */
68 #define M_APP0 0xe0
69 #define M_APP1 0xe1
70 #define M_APP2 0xe2
71 #define M_APP3 0xe3
72 #define M_APP4 0xe4
73 #define M_APP5 0xe5
74 #define M_APP6 0xe6
75 #define M_APP7 0xe7
76 #define M_APP8 0xe8
77 #define M_APP9 0xe9
78 #define M_APP10 0xea
79 #define M_APP11 0xeb
80 #define M_APP12 0xec
81 #define M_APP13 0xed
82 #define M_APP14 0xee
83 #define M_APP15 0xef
84
85 /* {{{ php_iptc_put1
86 */
php_iptc_put1(FILE * fp,int spool,unsigned char c,unsigned char ** spoolbuf)87 static int php_iptc_put1(FILE *fp, int spool, unsigned char c, unsigned char **spoolbuf)
88 {
89 if (spool > 0)
90 PUTC(c);
91
92 if (spoolbuf) *(*spoolbuf)++ = c;
93
94 return c;
95 }
96 /* }}} */
97
98 /* {{{ php_iptc_get1
99 */
php_iptc_get1(FILE * fp,int spool,unsigned char ** spoolbuf)100 static int php_iptc_get1(FILE *fp, int spool, unsigned char **spoolbuf)
101 {
102 int c;
103 char cc;
104
105 c = getc(fp);
106
107 if (c == EOF) return EOF;
108
109 if (spool > 0) {
110 cc = c;
111 PUTC(cc);
112 }
113
114 if (spoolbuf) *(*spoolbuf)++ = c;
115
116 return c;
117 }
118 /* }}} */
119
120 /* {{{ php_iptc_read_remaining
121 */
php_iptc_read_remaining(FILE * fp,int spool,unsigned char ** spoolbuf)122 static int php_iptc_read_remaining(FILE *fp, int spool, unsigned char **spoolbuf)
123 {
124 while (php_iptc_get1(fp, spool, spoolbuf) != EOF) continue;
125
126 return M_EOI;
127 }
128 /* }}} */
129
130 /* {{{ php_iptc_skip_variable
131 */
php_iptc_skip_variable(FILE * fp,int spool,unsigned char ** spoolbuf)132 static int php_iptc_skip_variable(FILE *fp, int spool, unsigned char **spoolbuf)
133 {
134 unsigned int length;
135 int c1, c2;
136
137 if ((c1 = php_iptc_get1(fp, spool, spoolbuf)) == EOF) return M_EOI;
138
139 if ((c2 = php_iptc_get1(fp, spool, spoolbuf)) == EOF) return M_EOI;
140
141 length = (((unsigned char) c1) << 8) + ((unsigned char) c2);
142
143 length -= 2;
144
145 while (length--)
146 if (php_iptc_get1(fp, spool, spoolbuf) == EOF) return M_EOI;
147
148 return 0;
149 }
150 /* }}} */
151
152 /* {{{ php_iptc_next_marker
153 */
php_iptc_next_marker(FILE * fp,int spool,unsigned char ** spoolbuf)154 static int php_iptc_next_marker(FILE *fp, int spool, unsigned char **spoolbuf)
155 {
156 int c;
157
158 /* skip unimportant stuff */
159
160 c = php_iptc_get1(fp, spool, spoolbuf);
161
162 if (c == EOF) return M_EOI;
163
164 while (c != 0xff) {
165 if ((c = php_iptc_get1(fp, spool, spoolbuf)) == EOF)
166 return M_EOI; /* we hit EOF */
167 }
168
169 /* get marker byte, swallowing possible padding */
170 do {
171 c = php_iptc_get1(fp, 0, 0);
172 if (c == EOF)
173 return M_EOI; /* we hit EOF */
174 else
175 if (c == 0xff)
176 php_iptc_put1(fp, spool, (unsigned char)c, spoolbuf);
177 } while (c == 0xff);
178
179 return (unsigned int) c;
180 }
181 /* }}} */
182
183 static char psheader[] = "\xFF\xED\0\0Photoshop 3.0\08BIM\x04\x04\0\0\0\0";
184
185 /* {{{ proto array iptcembed(string iptcdata, string jpeg_file_name [, int spool])
186 Embed binary IPTC data into a JPEG image. */
PHP_FUNCTION(iptcembed)187 PHP_FUNCTION(iptcembed)
188 {
189 char *iptcdata, *jpeg_file;
190 size_t iptcdata_len, jpeg_file_len;
191 zend_long spool = 0;
192 FILE *fp;
193 unsigned int marker, done = 0;
194 size_t inx;
195 zend_string *spoolbuf = NULL;
196 unsigned char *poi = NULL;
197 zend_stat_t sb;
198 zend_bool written = 0;
199
200 ZEND_PARSE_PARAMETERS_START(2, 3)
201 Z_PARAM_STRING(iptcdata, iptcdata_len)
202 Z_PARAM_PATH(jpeg_file, jpeg_file_len)
203 Z_PARAM_OPTIONAL
204 Z_PARAM_LONG(spool)
205 ZEND_PARSE_PARAMETERS_END();
206
207 if (php_check_open_basedir(jpeg_file)) {
208 RETURN_FALSE;
209 }
210
211 if (iptcdata_len >= SIZE_MAX - sizeof(psheader) - 1025) {
212 php_error_docref(NULL, E_WARNING, "IPTC data too large");
213 RETURN_FALSE;
214 }
215
216 if ((fp = VCWD_FOPEN(jpeg_file, "rb")) == 0) {
217 php_error_docref(NULL, E_WARNING, "Unable to open %s", jpeg_file);
218 RETURN_FALSE;
219 }
220
221 if (spool < 2) {
222 zend_fstat(fileno(fp), &sb);
223
224 spoolbuf = zend_string_safe_alloc(1, iptcdata_len + sizeof(psheader) + 1024 + 1, sb.st_size, 0);
225 poi = (unsigned char*)ZSTR_VAL(spoolbuf);
226 memset(poi, 0, iptcdata_len + sizeof(psheader) + sb.st_size + 1024 + 1);
227 }
228
229 if (php_iptc_get1(fp, spool, poi?&poi:0) != 0xFF) {
230 fclose(fp);
231 if (spoolbuf) {
232 zend_string_free(spoolbuf);
233 }
234 RETURN_FALSE;
235 }
236
237 if (php_iptc_get1(fp, spool, poi?&poi:0) != 0xD8) {
238 fclose(fp);
239 if (spoolbuf) {
240 zend_string_free(spoolbuf);
241 }
242 RETURN_FALSE;
243 }
244
245 while (!done) {
246 marker = php_iptc_next_marker(fp, spool, poi?&poi:0);
247
248 if (marker == M_EOI) { /* EOF */
249 break;
250 } else if (marker != M_APP13) {
251 php_iptc_put1(fp, spool, (unsigned char)marker, poi?&poi:0);
252 }
253
254 switch (marker) {
255 case M_APP13:
256 /* we are going to write a new APP13 marker, so don't output the old one */
257 php_iptc_skip_variable(fp, 0, 0);
258 fgetc(fp); /* skip already copied 0xFF byte */
259 php_iptc_read_remaining(fp, spool, poi?&poi:0);
260 done = 1;
261 break;
262
263 case M_APP0:
264 /* APP0 is in each and every JPEG, so when we hit APP0 we insert our new APP13! */
265 case M_APP1:
266 if (written) {
267 /* don't try to write the data twice */
268 break;
269 }
270 written = 1;
271
272 php_iptc_skip_variable(fp, spool, poi?&poi:0);
273
274 if (iptcdata_len & 1) {
275 iptcdata_len++; /* make the length even */
276 }
277
278 psheader[ 2 ] = (iptcdata_len+28)>>8;
279 psheader[ 3 ] = (iptcdata_len+28)&0xff;
280
281 for (inx = 0; inx < 28; inx++) {
282 php_iptc_put1(fp, spool, psheader[inx], poi?&poi:0);
283 }
284
285 php_iptc_put1(fp, spool, (unsigned char)(iptcdata_len>>8), poi?&poi:0);
286 php_iptc_put1(fp, spool, (unsigned char)(iptcdata_len&0xff), poi?&poi:0);
287
288 for (inx = 0; inx < iptcdata_len; inx++) {
289 php_iptc_put1(fp, spool, iptcdata[inx], poi?&poi:0);
290 }
291 break;
292
293 case M_SOS:
294 /* we hit data, no more marker-inserting can be done! */
295 php_iptc_read_remaining(fp, spool, poi?&poi:0);
296 done = 1;
297 break;
298
299 default:
300 php_iptc_skip_variable(fp, spool, poi?&poi:0);
301 break;
302 }
303 }
304
305 fclose(fp);
306
307 if (spool < 2) {
308 spoolbuf = zend_string_truncate(spoolbuf, poi - (unsigned char*)ZSTR_VAL(spoolbuf), 0);
309 RETURN_NEW_STR(spoolbuf);
310 } else {
311 RETURN_TRUE;
312 }
313 }
314 /* }}} */
315
316 /* {{{ proto array iptcparse(string iptcdata)
317 Parse binary IPTC-data into associative array */
PHP_FUNCTION(iptcparse)318 PHP_FUNCTION(iptcparse)
319 {
320 size_t inx = 0, len;
321 unsigned int tagsfound = 0;
322 unsigned char *buffer, recnum, dataset;
323 char *str, key[16];
324 size_t str_len;
325 zval values, *element;
326
327 ZEND_PARSE_PARAMETERS_START(1, 1)
328 Z_PARAM_STRING(str, str_len)
329 ZEND_PARSE_PARAMETERS_END();
330
331 buffer = (unsigned char *)str;
332
333 while (inx < str_len) { /* find 1st tag */
334 if ((buffer[inx] == 0x1c) && ((buffer[inx+1] == 0x01) || (buffer[inx+1] == 0x02))){
335 break;
336 } else {
337 inx++;
338 }
339 }
340
341 while (inx < str_len) {
342 if (buffer[ inx++ ] != 0x1c) {
343 break; /* we ran against some data which does not conform to IPTC - stop parsing! */
344 }
345
346 if ((inx + 4) >= str_len)
347 break;
348
349 dataset = buffer[ inx++ ];
350 recnum = buffer[ inx++ ];
351
352 if (buffer[ inx ] & (unsigned char) 0x80) { /* long tag */
353 if((inx+6) >= str_len) {
354 break;
355 }
356 len = (((zend_long) buffer[ inx + 2 ]) << 24) + (((zend_long) buffer[ inx + 3 ]) << 16) +
357 (((zend_long) buffer[ inx + 4 ]) << 8) + (((zend_long) buffer[ inx + 5 ]));
358 inx += 6;
359 } else { /* short tag */
360 len = (((unsigned short) buffer[ inx ])<<8) | (unsigned short)buffer[ inx+1 ];
361 inx += 2;
362 }
363
364 if ((len > str_len) || (inx + len) > str_len) {
365 break;
366 }
367
368 snprintf(key, sizeof(key), "%d#%03d", (unsigned int) dataset, (unsigned int) recnum);
369
370 if (tagsfound == 0) { /* found the 1st tag - initialize the return array */
371 array_init(return_value);
372 }
373
374 if ((element = zend_hash_str_find(Z_ARRVAL_P(return_value), key, strlen(key))) == NULL) {
375 array_init(&values);
376
377 element = zend_hash_str_update(Z_ARRVAL_P(return_value), key, strlen(key), &values);
378 }
379
380 add_next_index_stringl(element, (char *) buffer+inx, len);
381 inx += len;
382 tagsfound++;
383 }
384
385 if (! tagsfound) {
386 RETURN_FALSE;
387 }
388 }
389 /* }}} */
390
391 /*
392 * Local variables:
393 * tab-width: 4
394 * c-basic-offset: 4
395 * End:
396 * vim600: sw=4 ts=4 fdm=marker
397 * vim<600: sw=4 ts=4
398 */
399
