1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 7 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1997-2017 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 int inx;
195 zend_string *spoolbuf = NULL;
196 unsigned char *poi = NULL;
197 zend_stat_t sb;
198 zend_bool written = 0;
199
200 if (zend_parse_parameters(ZEND_NUM_ARGS(), "sp|l", &iptcdata, &iptcdata_len, &jpeg_file, &jpeg_file_len, &spool) != SUCCESS) {
201 return;
202 }
203
204 if (php_check_open_basedir(jpeg_file)) {
205 RETURN_FALSE;
206 }
207
208 if (iptcdata_len >= SIZE_MAX - sizeof(psheader) - 1025) {
209 php_error_docref(NULL, E_WARNING, "IPTC data too large");
210 RETURN_FALSE;
211 }
212
213 if ((fp = VCWD_FOPEN(jpeg_file, "rb")) == 0) {
214 php_error_docref(NULL, E_WARNING, "Unable to open %s", jpeg_file);
215 RETURN_FALSE;
216 }
217
218 if (spool < 2) {
219 zend_fstat(fileno(fp), &sb);
220
221 spoolbuf = zend_string_safe_alloc(1, iptcdata_len + sizeof(psheader) + 1024 + 1, sb.st_size, 0);
222 poi = (unsigned char*)ZSTR_VAL(spoolbuf);
223 memset(poi, 0, iptcdata_len + sizeof(psheader) + sb.st_size + 1024 + 1);
224 }
225
226 if (php_iptc_get1(fp, spool, poi?&poi:0) != 0xFF) {
227 fclose(fp);
228 if (spoolbuf) {
229 zend_string_free(spoolbuf);
230 }
231 RETURN_FALSE;
232 }
233
234 if (php_iptc_get1(fp, spool, poi?&poi:0) != 0xD8) {
235 fclose(fp);
236 if (spoolbuf) {
237 zend_string_free(spoolbuf);
238 }
239 RETURN_FALSE;
240 }
241
242 while (!done) {
243 marker = php_iptc_next_marker(fp, spool, poi?&poi:0);
244
245 if (marker == M_EOI) { /* EOF */
246 break;
247 } else if (marker != M_APP13) {
248 php_iptc_put1(fp, spool, (unsigned char)marker, poi?&poi:0);
249 }
250
251 switch (marker) {
252 case M_APP13:
253 /* we are going to write a new APP13 marker, so don't output the old one */
254 php_iptc_skip_variable(fp, 0, 0);
255 fgetc(fp); /* skip already copied 0xFF byte */
256 php_iptc_read_remaining(fp, spool, poi?&poi:0);
257 done = 1;
258 break;
259
260 case M_APP0:
261 /* APP0 is in each and every JPEG, so when we hit APP0 we insert our new APP13! */
262 case M_APP1:
263 if (written) {
264 /* don't try to write the data twice */
265 break;
266 }
267 written = 1;
268
269 php_iptc_skip_variable(fp, spool, poi?&poi:0);
270
271 if (iptcdata_len & 1) {
272 iptcdata_len++; /* make the length even */
273 }
274
275 psheader[ 2 ] = (iptcdata_len+28)>>8;
276 psheader[ 3 ] = (iptcdata_len+28)&0xff;
277
278 for (inx = 0; inx < 28; inx++) {
279 php_iptc_put1(fp, spool, psheader[inx], poi?&poi:0);
280 }
281
282 php_iptc_put1(fp, spool, (unsigned char)(iptcdata_len>>8), poi?&poi:0);
283 php_iptc_put1(fp, spool, (unsigned char)(iptcdata_len&0xff), poi?&poi:0);
284
285 for (inx = 0; inx < iptcdata_len; inx++) {
286 php_iptc_put1(fp, spool, iptcdata[inx], poi?&poi:0);
287 }
288 break;
289
290 case M_SOS:
291 /* we hit data, no more marker-inserting can be done! */
292 php_iptc_read_remaining(fp, spool, poi?&poi:0);
293 done = 1;
294 break;
295
296 default:
297 php_iptc_skip_variable(fp, spool, poi?&poi:0);
298 break;
299 }
300 }
301
302 fclose(fp);
303
304 if (spool < 2) {
305 spoolbuf = zend_string_truncate(spoolbuf, poi - (unsigned char*)ZSTR_VAL(spoolbuf), 0);
306 RETURN_NEW_STR(spoolbuf);
307 } else {
308 RETURN_TRUE;
309 }
310 }
311 /* }}} */
312
313 /* {{{ proto array iptcparse(string iptcdata)
314 Parse binary IPTC-data into associative array */
PHP_FUNCTION(iptcparse)315 PHP_FUNCTION(iptcparse)
316 {
317 int inx = 0, len;
318 unsigned int tagsfound = 0;
319 unsigned char *buffer, recnum, dataset;
320 char *str, key[16];
321 size_t str_len;
322 zval values, *element;
323
324 if (zend_parse_parameters(ZEND_NUM_ARGS(), "s", &str, &str_len) != SUCCESS) {
325 return;
326 }
327
328 buffer = (unsigned char *)str;
329
330 while (inx < str_len) { /* find 1st tag */
331 if ((buffer[inx] == 0x1c) && ((buffer[inx+1] == 0x01) || (buffer[inx+1] == 0x02))){
332 break;
333 } else {
334 inx++;
335 }
336 }
337
338 while (inx < str_len) {
339 if (buffer[ inx++ ] != 0x1c) {
340 break; /* we ran against some data which does not conform to IPTC - stop parsing! */
341 }
342
343 if ((inx + 4) >= str_len)
344 break;
345
346 dataset = buffer[ inx++ ];
347 recnum = buffer[ inx++ ];
348
349 if (buffer[ inx ] & (unsigned char) 0x80) { /* long tag */
350 if((inx+6) >= str_len) {
351 break;
352 }
353 len = (((zend_long) buffer[ inx + 2 ]) << 24) + (((zend_long) buffer[ inx + 3 ]) << 16) +
354 (((zend_long) buffer[ inx + 4 ]) << 8) + (((zend_long) buffer[ inx + 5 ]));
355 inx += 6;
356 } else { /* short tag */
357 len = (((unsigned short) buffer[ inx ])<<8) | (unsigned short)buffer[ inx+1 ];
358 inx += 2;
359 }
360
361 if ((len < 0) || (len > str_len) || (inx + len) > str_len) {
362 break;
363 }
364
365 snprintf(key, sizeof(key), "%d#%03d", (unsigned int) dataset, (unsigned int) recnum);
366
367 if (tagsfound == 0) { /* found the 1st tag - initialize the return array */
368 array_init(return_value);
369 }
370
371 if ((element = zend_hash_str_find(Z_ARRVAL_P(return_value), key, strlen(key))) == NULL) {
372 array_init(&values);
373
374 element = zend_hash_str_update(Z_ARRVAL_P(return_value), key, strlen(key), &values);
375 }
376
377 add_next_index_stringl(element, (char *) buffer+inx, len);
378 inx += len;
379 tagsfound++;
380 }
381
382 if (! tagsfound) {
383 RETURN_FALSE;
384 }
385 }
386 /* }}} */
387
388 /*
389 * Local variables:
390 * tab-width: 4
391 * c-basic-offset: 4
392 * End:
393 * vim600: sw=4 ts=4 fdm=marker
394 * vim<600: sw=4 ts=4
395 */
396
