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@lerdorf.on.ca> |
14 | Stefan Röhrich <sr@linux.de> |
15 | Zeev Suraski <zeev@php.net> |
16 | Jade Nicoletti <nicoletti@nns.ch> |
17 | Michael Wallner <mike@php.net> |
18 +----------------------------------------------------------------------+
19 */
20
21 #ifdef HAVE_CONFIG_H
22 #include <config.h>
23 #endif
24
25 #include "php.h"
26 #include "SAPI.h"
27 #include "php_ini.h"
28 #include "ext/standard/info.h"
29 #include "php_zlib.h"
30 #include "zlib_arginfo.h"
31
32 /*
33 * zlib include files can define the following preprocessor defines which rename
34 * the corresponding PHP functions to gzopen64, gzseek64 and gztell64 and thereby
35 * breaking some software, most notably PEAR's Archive_Tar, which halts execution
36 * without error message on gzip compressed archives.
37 *
38 * This only seems to happen on 32bit systems with large file support.
39 */
40 #undef gzopen
41 #undef gzseek
42 #undef gztell
43
44 ZEND_DECLARE_MODULE_GLOBALS(zlib)
45
46 /* InflateContext class */
47
48 zend_class_entry *inflate_context_ce;
49 static zend_object_handlers inflate_context_object_handlers;
50
inflate_context_from_obj(zend_object * obj)51 static inline php_zlib_context *inflate_context_from_obj(zend_object *obj) {
52 return (php_zlib_context *)((char *)(obj) - XtOffsetOf(php_zlib_context, std));
53 }
54
55 #define Z_INFLATE_CONTEXT_P(zv) inflate_context_from_obj(Z_OBJ_P(zv))
56
inflate_context_create_object(zend_class_entry * class_type)57 static zend_object *inflate_context_create_object(zend_class_entry *class_type) {
58 php_zlib_context *intern = zend_object_alloc(sizeof(php_zlib_context), class_type);
59
60 zend_object_std_init(&intern->std, class_type);
61 object_properties_init(&intern->std, class_type);
62
63 return &intern->std;
64 }
65
inflate_context_get_constructor(zend_object * object)66 static zend_function *inflate_context_get_constructor(zend_object *object) {
67 zend_throw_error(NULL, "Cannot directly construct InflateContext, use inflate_init() instead");
68 return NULL;
69 }
70
inflate_context_free_obj(zend_object * object)71 static void inflate_context_free_obj(zend_object *object)
72 {
73 php_zlib_context *intern = inflate_context_from_obj(object);
74
75 if (intern->inflateDict) {
76 efree(intern->inflateDict);
77 }
78 inflateEnd(&intern->Z);
79
80 zend_object_std_dtor(&intern->std);
81 }
82 /* }}} */
83
84 /* DeflateContext class */
85
86 zend_class_entry *deflate_context_ce;
87 static zend_object_handlers deflate_context_object_handlers;
88
deflate_context_from_obj(zend_object * obj)89 static inline php_zlib_context *deflate_context_from_obj(zend_object *obj) {
90 return (php_zlib_context *)((char *)(obj) - XtOffsetOf(php_zlib_context, std));
91 }
92
93 #define Z_DEFLATE_CONTEXT_P(zv) deflate_context_from_obj(Z_OBJ_P(zv))
94
deflate_context_create_object(zend_class_entry * class_type)95 static zend_object *deflate_context_create_object(zend_class_entry *class_type) {
96 php_zlib_context *intern = zend_object_alloc(sizeof(php_zlib_context), class_type);
97
98 zend_object_std_init(&intern->std, class_type);
99 object_properties_init(&intern->std, class_type);
100
101 return &intern->std;
102 }
103
deflate_context_get_constructor(zend_object * object)104 static zend_function *deflate_context_get_constructor(zend_object *object) {
105 zend_throw_error(NULL, "Cannot directly construct DeflateContext, use deflate_init() instead");
106 return NULL;
107 }
108
deflate_context_free_obj(zend_object * object)109 static void deflate_context_free_obj(zend_object *object)
110 {
111 php_zlib_context *intern = deflate_context_from_obj(object);
112
113 deflateEnd(&intern->Z);
114
115 zend_object_std_dtor(&intern->std);
116 }
117 /* }}} */
118
119 /* {{{ Memory management wrappers */
120
php_zlib_alloc(voidpf opaque,uInt items,uInt size)121 static voidpf php_zlib_alloc(voidpf opaque, uInt items, uInt size)
122 {
123 return (voidpf)safe_emalloc(items, size, 0);
124 }
125
php_zlib_free(voidpf opaque,voidpf address)126 static void php_zlib_free(voidpf opaque, voidpf address)
127 {
128 efree((void*)address);
129 }
130 /* }}} */
131
132 /* {{{ php_zlib_output_conflict_check() */
php_zlib_output_conflict_check(const char * handler_name,size_t handler_name_len)133 static zend_result php_zlib_output_conflict_check(const char *handler_name, size_t handler_name_len)
134 {
135 if (php_output_get_level() > 0) {
136 if (php_output_handler_conflict(handler_name, handler_name_len, ZEND_STRL(PHP_ZLIB_OUTPUT_HANDLER_NAME))
137 || php_output_handler_conflict(handler_name, handler_name_len, ZEND_STRL("ob_gzhandler"))
138 || php_output_handler_conflict(handler_name, handler_name_len, ZEND_STRL("mb_output_handler"))
139 || php_output_handler_conflict(handler_name, handler_name_len, ZEND_STRL("URL-Rewriter"))) {
140 return FAILURE;
141 }
142 }
143 return SUCCESS;
144 }
145 /* }}} */
146
147 /* {{{ php_zlib_output_encoding() */
php_zlib_output_encoding(void)148 static int php_zlib_output_encoding(void)
149 {
150 zval *enc;
151
152 if (!ZLIBG(compression_coding)) {
153 if ((Z_TYPE(PG(http_globals)[TRACK_VARS_SERVER]) == IS_ARRAY || zend_is_auto_global(ZSTR_KNOWN(ZEND_STR_AUTOGLOBAL_SERVER))) &&
154 (enc = zend_hash_str_find(Z_ARRVAL(PG(http_globals)[TRACK_VARS_SERVER]), "HTTP_ACCEPT_ENCODING", sizeof("HTTP_ACCEPT_ENCODING") - 1))) {
155 convert_to_string(enc);
156 if (strstr(Z_STRVAL_P(enc), "gzip")) {
157 ZLIBG(compression_coding) = PHP_ZLIB_ENCODING_GZIP;
158 } else if (strstr(Z_STRVAL_P(enc), "deflate")) {
159 ZLIBG(compression_coding) = PHP_ZLIB_ENCODING_DEFLATE;
160 }
161 }
162 }
163 return ZLIBG(compression_coding);
164 }
165 /* }}} */
166
167 /* {{{ php_zlib_output_handler_ex() */
php_zlib_output_handler_ex(php_zlib_context * ctx,php_output_context * output_context)168 static zend_result php_zlib_output_handler_ex(php_zlib_context *ctx, php_output_context *output_context)
169 {
170 int flags = Z_SYNC_FLUSH;
171
172 if (output_context->op & PHP_OUTPUT_HANDLER_START) {
173 /* start up */
174 if (Z_OK != deflateInit2(&ctx->Z, ZLIBG(output_compression_level), Z_DEFLATED, ZLIBG(compression_coding), MAX_MEM_LEVEL, Z_DEFAULT_STRATEGY)) {
175 return FAILURE;
176 }
177 }
178
179 if (output_context->op & PHP_OUTPUT_HANDLER_CLEAN) {
180 /* free buffers */
181 deflateEnd(&ctx->Z);
182
183 if (output_context->op & PHP_OUTPUT_HANDLER_FINAL) {
184 /* discard */
185 return SUCCESS;
186 } else {
187 /* restart */
188 if (Z_OK != deflateInit2(&ctx->Z, ZLIBG(output_compression_level), Z_DEFLATED, ZLIBG(compression_coding), MAX_MEM_LEVEL, Z_DEFAULT_STRATEGY)) {
189 return FAILURE;
190 }
191 ctx->buffer.used = 0;
192 }
193 } else {
194 if (output_context->in.used) {
195 /* append input */
196 if (ctx->buffer.free < output_context->in.used) {
197 if (!(ctx->buffer.aptr = erealloc_recoverable(ctx->buffer.data, ctx->buffer.used + ctx->buffer.free + output_context->in.used))) {
198 deflateEnd(&ctx->Z);
199 return FAILURE;
200 }
201 ctx->buffer.data = ctx->buffer.aptr;
202 ctx->buffer.free += output_context->in.used;
203 }
204 memcpy(ctx->buffer.data + ctx->buffer.used, output_context->in.data, output_context->in.used);
205 ctx->buffer.free -= output_context->in.used;
206 ctx->buffer.used += output_context->in.used;
207 }
208 output_context->out.size = PHP_ZLIB_BUFFER_SIZE_GUESS(output_context->in.used);
209 output_context->out.data = emalloc(output_context->out.size);
210 output_context->out.free = 1;
211 output_context->out.used = 0;
212
213 ctx->Z.avail_in = ctx->buffer.used;
214 ctx->Z.next_in = (Bytef *) ctx->buffer.data;
215 ctx->Z.avail_out = output_context->out.size;
216 ctx->Z.next_out = (Bytef *) output_context->out.data;
217
218 if (output_context->op & PHP_OUTPUT_HANDLER_FINAL) {
219 flags = Z_FINISH;
220 } else if (output_context->op & PHP_OUTPUT_HANDLER_FLUSH) {
221 flags = Z_FULL_FLUSH;
222 }
223
224 switch (deflate(&ctx->Z, flags)) {
225 case Z_OK:
226 if (flags == Z_FINISH) {
227 deflateEnd(&ctx->Z);
228 return FAILURE;
229 }
230 ZEND_FALLTHROUGH;
231 case Z_STREAM_END:
232 if (ctx->Z.avail_in) {
233 memmove(ctx->buffer.data, ctx->buffer.data + ctx->buffer.used - ctx->Z.avail_in, ctx->Z.avail_in);
234 }
235 ctx->buffer.free += ctx->buffer.used - ctx->Z.avail_in;
236 ctx->buffer.used = ctx->Z.avail_in;
237 output_context->out.used = output_context->out.size - ctx->Z.avail_out;
238 break;
239 default:
240 deflateEnd(&ctx->Z);
241 return FAILURE;
242 }
243
244 if (output_context->op & PHP_OUTPUT_HANDLER_FINAL) {
245 deflateEnd(&ctx->Z);
246 }
247 }
248
249 return SUCCESS;
250 }
251 /* }}} */
252
253 /* {{{ php_zlib_output_handler() */
php_zlib_output_handler(void ** handler_context,php_output_context * output_context)254 static zend_result php_zlib_output_handler(void **handler_context, php_output_context *output_context)
255 {
256 php_zlib_context *ctx = *(php_zlib_context **) handler_context;
257
258 if (!php_zlib_output_encoding()) {
259 /* "Vary: Accept-Encoding" header sent along uncompressed content breaks caching in MSIE,
260 so let's just send it with successfully compressed content or unless the complete
261 buffer gets discarded, see http://bugs.php.net/40325;
262
263 Test as follows:
264 +Vary: $ HTTP_ACCEPT_ENCODING=gzip ./sapi/cgi/php <<<'<?php ob_start("ob_gzhandler"); echo "foo\n";'
265 +Vary: $ HTTP_ACCEPT_ENCODING= ./sapi/cgi/php <<<'<?php ob_start("ob_gzhandler"); echo "foo\n";'
266 -Vary: $ HTTP_ACCEPT_ENCODING=gzip ./sapi/cgi/php <<<'<?php ob_start("ob_gzhandler"); echo "foo\n"; ob_end_clean();'
267 -Vary: $ HTTP_ACCEPT_ENCODING= ./sapi/cgi/php <<<'<?php ob_start("ob_gzhandler"); echo "foo\n"; ob_end_clean();'
268 */
269 if ((output_context->op & PHP_OUTPUT_HANDLER_START)
270 && (output_context->op != (PHP_OUTPUT_HANDLER_START|PHP_OUTPUT_HANDLER_CLEAN|PHP_OUTPUT_HANDLER_FINAL))
271 ) {
272 sapi_add_header_ex(ZEND_STRL("Vary: Accept-Encoding"), 1, 0);
273 }
274 return FAILURE;
275 }
276
277 if (SUCCESS != php_zlib_output_handler_ex(ctx, output_context)) {
278 return FAILURE;
279 }
280
281 if (!(output_context->op & PHP_OUTPUT_HANDLER_CLEAN) || ((output_context->op & PHP_OUTPUT_HANDLER_START) && !(output_context->op & PHP_OUTPUT_HANDLER_FINAL))) {
282 int flags;
283
284 if (SUCCESS == php_output_handler_hook(PHP_OUTPUT_HANDLER_HOOK_GET_FLAGS, &flags)) {
285 /* only run this once */
286 if (!(flags & PHP_OUTPUT_HANDLER_STARTED)) {
287 if (SG(headers_sent) || !ZLIBG(output_compression)) {
288 deflateEnd(&ctx->Z);
289 return FAILURE;
290 }
291 switch (ZLIBG(compression_coding)) {
292 case PHP_ZLIB_ENCODING_GZIP:
293 sapi_add_header_ex(ZEND_STRL("Content-Encoding: gzip"), 1, 1);
294 break;
295 case PHP_ZLIB_ENCODING_DEFLATE:
296 sapi_add_header_ex(ZEND_STRL("Content-Encoding: deflate"), 1, 1);
297 break;
298 default:
299 deflateEnd(&ctx->Z);
300 return FAILURE;
301 }
302 sapi_add_header_ex(ZEND_STRL("Vary: Accept-Encoding"), 1, 0);
303 php_output_handler_hook(PHP_OUTPUT_HANDLER_HOOK_IMMUTABLE, NULL);
304 }
305 }
306 }
307
308 return SUCCESS;
309 }
310 /* }}} */
311
312 /* {{{ php_zlib_output_handler_context_init() */
php_zlib_output_handler_context_init(void)313 static php_zlib_context *php_zlib_output_handler_context_init(void)
314 {
315 php_zlib_context *ctx = (php_zlib_context *) ecalloc(1, sizeof(php_zlib_context));
316 ctx->Z.zalloc = php_zlib_alloc;
317 ctx->Z.zfree = php_zlib_free;
318 return ctx;
319 }
320 /* }}} */
321
322 /* {{{ php_zlib_output_handler_context_dtor() */
php_zlib_output_handler_context_dtor(void * opaq)323 static void php_zlib_output_handler_context_dtor(void *opaq)
324 {
325 php_zlib_context *ctx = (php_zlib_context *) opaq;
326
327 if (ctx) {
328 if (ctx->buffer.data) {
329 efree(ctx->buffer.data);
330 }
331 efree(ctx);
332 }
333 }
334 /* }}} */
335
336 /* {{{ php_zlib_output_handler_init() */
php_zlib_output_handler_init(const char * handler_name,size_t handler_name_len,size_t chunk_size,int flags)337 static php_output_handler *php_zlib_output_handler_init(const char *handler_name, size_t handler_name_len, size_t chunk_size, int flags)
338 {
339 php_output_handler *h = NULL;
340
341 if (!ZLIBG(output_compression)) {
342 ZLIBG(output_compression) = chunk_size ? chunk_size : PHP_OUTPUT_HANDLER_DEFAULT_SIZE;
343 }
344
345 ZLIBG(handler_registered) = 1;
346
347 if ((h = php_output_handler_create_internal(handler_name, handler_name_len, php_zlib_output_handler, chunk_size, flags))) {
348 php_output_handler_set_context(h, php_zlib_output_handler_context_init(), php_zlib_output_handler_context_dtor);
349 }
350
351 return h;
352 }
353 /* }}} */
354
355 /* {{{ php_zlib_output_compression_start() */
php_zlib_output_compression_start(void)356 static void php_zlib_output_compression_start(void)
357 {
358 zval zoh;
359 php_output_handler *h;
360
361 switch (ZLIBG(output_compression)) {
362 case 0:
363 break;
364 case 1:
365 ZLIBG(output_compression) = PHP_OUTPUT_HANDLER_DEFAULT_SIZE;
366 ZEND_FALLTHROUGH;
367 default:
368 if ( php_zlib_output_encoding() &&
369 (h = php_zlib_output_handler_init(ZEND_STRL(PHP_ZLIB_OUTPUT_HANDLER_NAME), ZLIBG(output_compression), PHP_OUTPUT_HANDLER_STDFLAGS)) &&
370 (SUCCESS == php_output_handler_start(h))) {
371 if (ZLIBG(output_handler) && *ZLIBG(output_handler)) {
372 ZVAL_STRING(&zoh, ZLIBG(output_handler));
373 php_output_start_user(&zoh, ZLIBG(output_compression), PHP_OUTPUT_HANDLER_STDFLAGS);
374 zval_ptr_dtor(&zoh);
375 }
376 }
377 break;
378 }
379 }
380 /* }}} */
381
382 /* {{{ php_zlib_encode() */
php_zlib_encode(const char * in_buf,size_t in_len,int encoding,int level)383 static zend_string *php_zlib_encode(const char *in_buf, size_t in_len, int encoding, int level)
384 {
385 int status;
386 z_stream Z;
387 zend_string *out;
388
389 memset(&Z, 0, sizeof(z_stream));
390 Z.zalloc = php_zlib_alloc;
391 Z.zfree = php_zlib_free;
392
393 if (Z_OK == (status = deflateInit2(&Z, level, Z_DEFLATED, encoding, MAX_MEM_LEVEL, Z_DEFAULT_STRATEGY))) {
394 out = zend_string_alloc(PHP_ZLIB_BUFFER_SIZE_GUESS(in_len), 0);
395
396 Z.next_in = (Bytef *) in_buf;
397 Z.next_out = (Bytef *) ZSTR_VAL(out);
398 Z.avail_in = in_len;
399 Z.avail_out = ZSTR_LEN(out);
400
401 status = deflate(&Z, Z_FINISH);
402 deflateEnd(&Z);
403
404 if (Z_STREAM_END == status) {
405 /* size buffer down to actual length */
406 out = zend_string_truncate(out, Z.total_out, 0);
407 ZSTR_VAL(out)[ZSTR_LEN(out)] = '\0';
408 return out;
409 } else {
410 zend_string_efree(out);
411 }
412 }
413
414 php_error_docref(NULL, E_WARNING, "%s", zError(status));
415 return NULL;
416 }
417 /* }}} */
418
419 /* {{{ php_zlib_inflate_rounds() */
php_zlib_inflate_rounds(z_stream * Z,size_t max,char ** buf,size_t * len)420 static inline int php_zlib_inflate_rounds(z_stream *Z, size_t max, char **buf, size_t *len)
421 {
422 int status, round = 0;
423 php_zlib_buffer buffer = {NULL, NULL, 0, 0, 0};
424
425 *buf = NULL;
426 *len = 0;
427
428 buffer.size = (max && (max < Z->avail_in)) ? max : Z->avail_in;
429
430 do {
431 if ((max && (max <= buffer.used)) || !(buffer.aptr = erealloc_recoverable(buffer.data, buffer.size))) {
432 status = Z_MEM_ERROR;
433 } else {
434 buffer.data = buffer.aptr;
435 Z->avail_out = buffer.free = buffer.size - buffer.used;
436 Z->next_out = (Bytef *) buffer.data + buffer.used;
437 #if 0
438 fprintf(stderr, "\n%3d: %3d PRIOR: size=%7lu,\tfree=%7lu,\tused=%7lu,\tavail_in=%7lu,\tavail_out=%7lu\n", round, status, buffer.size, buffer.free, buffer.used, Z->avail_in, Z->avail_out);
439 #endif
440 status = inflate(Z, Z_NO_FLUSH);
441
442 buffer.used += buffer.free - Z->avail_out;
443 buffer.free = Z->avail_out;
444 #if 0
445 fprintf(stderr, "%3d: %3d AFTER: size=%7lu,\tfree=%7lu,\tused=%7lu,\tavail_in=%7lu,\tavail_out=%7lu\n", round, status, buffer.size, buffer.free, buffer.used, Z->avail_in, Z->avail_out);
446 #endif
447 buffer.size += (buffer.size >> 3) + 1;
448 }
449 } while ((Z_BUF_ERROR == status || (Z_OK == status && Z->avail_in)) && ++round < 100);
450
451 if (status == Z_STREAM_END) {
452 buffer.data = erealloc(buffer.data, buffer.used + 1);
453 buffer.data[buffer.used] = '\0';
454 *buf = buffer.data;
455 *len = buffer.used;
456 } else {
457 if (buffer.data) {
458 efree(buffer.data);
459 }
460 /* HACK: See zlib/examples/zpipe.c inf() function for explanation. */
461 /* This works as long as this function is not used for streaming. Required to catch very short invalid data. */
462 status = (status == Z_OK) ? Z_DATA_ERROR : status;
463 }
464 return status;
465 }
466 /* }}} */
467
468 /* {{{ php_zlib_decode() */
php_zlib_decode(const char * in_buf,size_t in_len,char ** out_buf,size_t * out_len,int encoding,size_t max_len)469 static int php_zlib_decode(const char *in_buf, size_t in_len, char **out_buf, size_t *out_len, int encoding, size_t max_len)
470 {
471 int status = Z_DATA_ERROR;
472 z_stream Z;
473
474 memset(&Z, 0, sizeof(z_stream));
475 Z.zalloc = php_zlib_alloc;
476 Z.zfree = php_zlib_free;
477
478 if (in_len) {
479 retry_raw_inflate:
480 status = inflateInit2(&Z, encoding);
481 if (Z_OK == status) {
482 Z.next_in = (Bytef *) in_buf;
483 Z.avail_in = in_len + 1; /* NOTE: data must be zero terminated */
484
485 switch (status = php_zlib_inflate_rounds(&Z, max_len, out_buf, out_len)) {
486 case Z_STREAM_END:
487 inflateEnd(&Z);
488 return SUCCESS;
489
490 case Z_DATA_ERROR:
491 /* raw deflated data? */
492 if (PHP_ZLIB_ENCODING_ANY == encoding) {
493 inflateEnd(&Z);
494 encoding = PHP_ZLIB_ENCODING_RAW;
495 goto retry_raw_inflate;
496 }
497 }
498 inflateEnd(&Z);
499 }
500 }
501
502 *out_buf = NULL;
503 *out_len = 0;
504
505 php_error_docref(NULL, E_WARNING, "%s", zError(status));
506 return FAILURE;
507 }
508 /* }}} */
509
510 /* {{{ php_zlib_cleanup_ob_gzhandler_mess() */
php_zlib_cleanup_ob_gzhandler_mess(void)511 static void php_zlib_cleanup_ob_gzhandler_mess(void)
512 {
513 if (ZLIBG(ob_gzhandler)) {
514 deflateEnd(&(ZLIBG(ob_gzhandler)->Z));
515 php_zlib_output_handler_context_dtor(ZLIBG(ob_gzhandler));
516 ZLIBG(ob_gzhandler) = NULL;
517 }
518 }
519 /* }}} */
520
521 /* {{{ Legacy hack */
PHP_FUNCTION(ob_gzhandler)522 PHP_FUNCTION(ob_gzhandler)
523 {
524 char *in_str;
525 size_t in_len;
526 zend_long flags = 0;
527 php_output_context ctx = {0};
528 int encoding;
529
530 /*
531 * NOTE that the real ob_gzhandler is an alias to "zlib output compression".
532 * This is a really bad hack, because
533 * - we have to initialize a php_zlib_context on demand
534 * - we have to clean it up in RSHUTDOWN
535 * - OG(running) is not set or set to any other output handler
536 * - we have to mess around with php_output_context */
537
538 if (SUCCESS != zend_parse_parameters(ZEND_NUM_ARGS(), "sl", &in_str, &in_len, &flags)) {
539 RETURN_THROWS();
540 }
541
542 if (!(encoding = php_zlib_output_encoding())) {
543 RETURN_FALSE;
544 }
545
546 if (flags & PHP_OUTPUT_HANDLER_START) {
547 switch (encoding) {
548 case PHP_ZLIB_ENCODING_GZIP:
549 sapi_add_header_ex(ZEND_STRL("Content-Encoding: gzip"), 1, 1);
550 break;
551 case PHP_ZLIB_ENCODING_DEFLATE:
552 sapi_add_header_ex(ZEND_STRL("Content-Encoding: deflate"), 1, 1);
553 break;
554 }
555 sapi_add_header_ex(ZEND_STRL("Vary: Accept-Encoding"), 1, 0);
556 }
557
558 if (!ZLIBG(ob_gzhandler)) {
559 ZLIBG(ob_gzhandler) = php_zlib_output_handler_context_init();
560 }
561
562 ctx.op = flags;
563 ctx.in.data = in_str;
564 ctx.in.used = in_len;
565
566 zend_result rv = php_zlib_output_handler_ex(ZLIBG(ob_gzhandler), &ctx);
567
568 if (SUCCESS != rv) {
569 if (ctx.out.data && ctx.out.free) {
570 efree(ctx.out.data);
571 }
572 php_zlib_cleanup_ob_gzhandler_mess();
573 RETURN_FALSE;
574 }
575
576 if (ctx.out.data) {
577 RETVAL_STRINGL(ctx.out.data, ctx.out.used);
578 if (ctx.out.free) {
579 efree(ctx.out.data);
580 }
581 } else {
582 RETVAL_EMPTY_STRING();
583 }
584 }
585 /* }}} */
586
587 /* {{{ Returns the coding type used for output compression */
PHP_FUNCTION(zlib_get_coding_type)588 PHP_FUNCTION(zlib_get_coding_type)
589 {
590 if (zend_parse_parameters_none() == FAILURE) {
591 RETURN_THROWS();
592 }
593 switch (ZLIBG(compression_coding)) {
594 case PHP_ZLIB_ENCODING_GZIP:
595 RETURN_STRINGL("gzip", sizeof("gzip") - 1);
596 case PHP_ZLIB_ENCODING_DEFLATE:
597 RETURN_STRINGL("deflate", sizeof("deflate") - 1);
598 default:
599 RETURN_FALSE;
600 }
601 }
602 /* }}} */
603
604 /* {{{ Read and uncompress entire .gz-file into an array */
PHP_FUNCTION(gzfile)605 PHP_FUNCTION(gzfile)
606 {
607 char *filename;
608 size_t filename_len;
609 int flags = REPORT_ERRORS;
610 char buf[8192] = {0};
611 int i = 0;
612 zend_long use_include_path = 0;
613 php_stream *stream;
614
615 if (SUCCESS != zend_parse_parameters(ZEND_NUM_ARGS(), "p|l", &filename, &filename_len, &use_include_path)) {
616 RETURN_THROWS();
617 }
618
619 if (use_include_path) {
620 flags |= USE_PATH;
621 }
622
623 /* using a stream here is a bit more efficient (resource wise) than php_gzopen_wrapper */
624 stream = php_stream_gzopen(NULL, filename, "rb", flags, NULL, NULL STREAMS_CC);
625
626 if (!stream) {
627 /* Error reporting is already done by stream code */
628 RETURN_FALSE;
629 }
630
631 /* Initialize return array */
632 array_init(return_value);
633
634 /* Now loop through the file and do the magic quotes thing if needed */
635 memset(buf, 0, sizeof(buf));
636
637 while (php_stream_gets(stream, buf, sizeof(buf) - 1) != NULL) {
638 add_index_string(return_value, i++, buf);
639 }
640 php_stream_close(stream);
641 }
642 /* }}} */
643
644 /* {{{ Open a .gz-file and return a .gz-file pointer */
PHP_FUNCTION(gzopen)645 PHP_FUNCTION(gzopen)
646 {
647 char *filename;
648 char *mode;
649 size_t filename_len, mode_len;
650 int flags = REPORT_ERRORS;
651 php_stream *stream;
652 zend_long use_include_path = 0;
653
654 if (zend_parse_parameters(ZEND_NUM_ARGS(), "ps|l", &filename, &filename_len, &mode, &mode_len, &use_include_path) == FAILURE) {
655 RETURN_THROWS();
656 }
657
658 if (use_include_path) {
659 flags |= USE_PATH;
660 }
661
662 stream = php_stream_gzopen(NULL, filename, mode, flags, NULL, NULL STREAMS_CC);
663
664 if (!stream) {
665 RETURN_FALSE;
666 }
667 php_stream_to_zval(stream, return_value);
668 }
669 /* }}} */
670
671 /* {{{ Output a .gz-file */
PHP_FUNCTION(readgzfile)672 PHP_FUNCTION(readgzfile)
673 {
674 char *filename;
675 size_t filename_len;
676 int flags = REPORT_ERRORS;
677 php_stream *stream;
678 size_t size;
679 zend_long use_include_path = 0;
680
681 if (zend_parse_parameters(ZEND_NUM_ARGS(), "p|l", &filename, &filename_len, &use_include_path) == FAILURE) {
682 RETURN_THROWS();
683 }
684
685 if (use_include_path) {
686 flags |= USE_PATH;
687 }
688
689 stream = php_stream_gzopen(NULL, filename, "rb", flags, NULL, NULL STREAMS_CC);
690
691 if (!stream) {
692 RETURN_FALSE;
693 }
694 size = php_stream_passthru(stream);
695 php_stream_close(stream);
696 RETURN_LONG(size);
697 }
698 /* }}} */
699
700 #define PHP_ZLIB_ENCODE_FUNC(name, default_encoding) \
701 PHP_FUNCTION(name) \
702 { \
703 zend_string *in, *out; \
704 zend_long level = -1; \
705 zend_long encoding = default_encoding; \
706 if (default_encoding) { \
707 if (SUCCESS != zend_parse_parameters(ZEND_NUM_ARGS(), "S|ll", &in, &level, &encoding)) { \
708 RETURN_THROWS(); \
709 } \
710 } else { \
711 if (SUCCESS != zend_parse_parameters(ZEND_NUM_ARGS(), "Sl|l", &in, &encoding, &level)) { \
712 RETURN_THROWS(); \
713 } \
714 } \
715 if (level < -1 || level > 9) { \
716 zend_argument_value_error(default_encoding ? 2 : 3, "must be between -1 and 9"); \
717 RETURN_THROWS(); \
718 } \
719 switch (encoding) { \
720 case PHP_ZLIB_ENCODING_RAW: \
721 case PHP_ZLIB_ENCODING_GZIP: \
722 case PHP_ZLIB_ENCODING_DEFLATE: \
723 break; \
724 default: \
725 zend_argument_value_error(default_encoding ? 3 : 2, "must be one of ZLIB_ENCODING_RAW, ZLIB_ENCODING_GZIP, or ZLIB_ENCODING_DEFLATE"); \
726 RETURN_THROWS(); \
727 } \
728 if ((out = php_zlib_encode(ZSTR_VAL(in), ZSTR_LEN(in), encoding, level)) == NULL) { \
729 RETURN_FALSE; \
730 } \
731 RETURN_STR(out); \
732 }
733
734 #define PHP_ZLIB_DECODE_FUNC(name, encoding) \
735 PHP_FUNCTION(name) \
736 { \
737 char *in_buf, *out_buf; \
738 size_t in_len; \
739 size_t out_len; \
740 zend_long max_len = 0; \
741 if (SUCCESS != zend_parse_parameters(ZEND_NUM_ARGS(), "s|l", &in_buf, &in_len, &max_len)) { \
742 RETURN_THROWS(); \
743 } \
744 if (max_len < 0) { \
745 zend_argument_value_error(2, "must be greater than or equal to 0"); \
746 RETURN_THROWS(); \
747 } \
748 if (SUCCESS != php_zlib_decode(in_buf, in_len, &out_buf, &out_len, encoding, max_len)) { \
749 RETURN_FALSE; \
750 } \
751 RETVAL_STRINGL(out_buf, out_len); \
752 efree(out_buf); \
753 }
754
755 /* {{{ Compress data with the specified encoding */
756 PHP_ZLIB_ENCODE_FUNC(zlib_encode, 0);
757 /* }}} */
758
759 /* {{{ Uncompress any raw/gzip/zlib encoded data */
760 PHP_ZLIB_DECODE_FUNC(zlib_decode, PHP_ZLIB_ENCODING_ANY);
761 /* }}} */
762
763 /* NOTE: The naming of these userland functions was quite unlucky */
764 /* {{{ Encode data with the raw deflate encoding */
765 PHP_ZLIB_ENCODE_FUNC(gzdeflate, PHP_ZLIB_ENCODING_RAW);
766 /* }}} */
767
768 /* {{{ Encode data with the gzip encoding */
769 PHP_ZLIB_ENCODE_FUNC(gzencode, PHP_ZLIB_ENCODING_GZIP);
770 /* }}} */
771
772 /* {{{ Encode data with the zlib encoding */
773 PHP_ZLIB_ENCODE_FUNC(gzcompress, PHP_ZLIB_ENCODING_DEFLATE);
774 /* }}} */
775
776 /* {{{ Decode raw deflate encoded data */
777 PHP_ZLIB_DECODE_FUNC(gzinflate, PHP_ZLIB_ENCODING_RAW);
778 /* }}} */
779
780 /* {{{ Decode gzip encoded data */
781 PHP_ZLIB_DECODE_FUNC(gzdecode, PHP_ZLIB_ENCODING_GZIP);
782 /* }}} */
783
784 /* {{{ Decode zlib encoded data */
785 PHP_ZLIB_DECODE_FUNC(gzuncompress, PHP_ZLIB_ENCODING_DEFLATE);
786 /* }}} */
787
zlib_create_dictionary_string(HashTable * options,char ** dict,size_t * dictlen)788 static bool zlib_create_dictionary_string(HashTable *options, char **dict, size_t *dictlen) {
789 zval *option_buffer;
790
791 if (options && (option_buffer = zend_hash_str_find(options, ZEND_STRL("dictionary"))) != NULL) {
792 ZVAL_DEREF(option_buffer);
793 switch (Z_TYPE_P(option_buffer)) {
794 case IS_STRING: {
795 zend_string *str = Z_STR_P(option_buffer);
796 *dict = emalloc(ZSTR_LEN(str));
797 memcpy(*dict, ZSTR_VAL(str), ZSTR_LEN(str));
798 *dictlen = ZSTR_LEN(str);
799 } break;
800
801 case IS_ARRAY: {
802 HashTable *dictionary = Z_ARR_P(option_buffer);
803
804 if (zend_hash_num_elements(dictionary) > 0) {
805 char *dictptr;
806 zval *cur;
807 zend_string **strings = safe_emalloc(zend_hash_num_elements(dictionary), sizeof(zend_string *), 0);
808 zend_string **end, **ptr = strings - 1;
809
810 ZEND_HASH_FOREACH_VAL(dictionary, cur) {
811 *++ptr = zval_get_string(cur);
812 ZEND_ASSERT(*ptr);
813 if (ZSTR_LEN(*ptr) == 0 || EG(exception)) {
814 do {
815 zend_string_release(*ptr);
816 } while (--ptr >= strings);
817 efree(strings);
818 if (!EG(exception)) {
819 zend_argument_value_error(2, "must not contain empty strings");
820 }
821 return 0;
822 }
823 if (zend_str_has_nul_byte(*ptr)) {
824 do {
825 zend_string_release(*ptr);
826 } while (--ptr >= strings);
827 efree(strings);
828 zend_argument_value_error(2, "must not contain strings with null bytes");
829 return 0;
830 }
831
832 *dictlen += ZSTR_LEN(*ptr) + 1;
833 } ZEND_HASH_FOREACH_END();
834
835 dictptr = *dict = emalloc(*dictlen);
836 ptr = strings;
837 end = strings + zend_hash_num_elements(dictionary);
838 do {
839 memcpy(dictptr, ZSTR_VAL(*ptr), ZSTR_LEN(*ptr));
840 dictptr += ZSTR_LEN(*ptr);
841 *dictptr++ = 0;
842 zend_string_release_ex(*ptr, 0);
843 } while (++ptr != end);
844 efree(strings);
845 }
846 } break;
847
848 default:
849 zend_argument_type_error(2, "must be of type zero-terminated string or array, %s given", zend_zval_value_name(option_buffer));
850 return 0;
851 }
852 }
853
854 return 1;
855 }
856
857 /* {{{ Initialize an incremental inflate context with the specified encoding */
PHP_FUNCTION(inflate_init)858 PHP_FUNCTION(inflate_init)
859 {
860 php_zlib_context *ctx;
861 zend_long encoding, window = 15;
862 char *dict = NULL;
863 size_t dictlen = 0;
864 HashTable *options = NULL;
865 zval *option_buffer;
866
867 if (SUCCESS != zend_parse_parameters(ZEND_NUM_ARGS(), "l|H", &encoding, &options)) {
868 RETURN_THROWS();
869 }
870
871 if (options && (option_buffer = zend_hash_str_find(options, ZEND_STRL("window"))) != NULL) {
872 window = zval_get_long(option_buffer);
873 }
874 if (window < 8 || window > 15) {
875 zend_value_error("zlib window size (logarithm) (" ZEND_LONG_FMT ") must be within 8..15", window);
876 RETURN_THROWS();
877 }
878
879 if (!zlib_create_dictionary_string(options, &dict, &dictlen)) {
880 RETURN_THROWS();
881 }
882
883 switch (encoding) {
884 case PHP_ZLIB_ENCODING_RAW:
885 case PHP_ZLIB_ENCODING_GZIP:
886 case PHP_ZLIB_ENCODING_DEFLATE:
887 break;
888 default:
889 zend_value_error("Encoding mode must be ZLIB_ENCODING_RAW, ZLIB_ENCODING_GZIP or ZLIB_ENCODING_DEFLATE");
890 RETURN_THROWS();
891 }
892
893 object_init_ex(return_value, inflate_context_ce);
894 ctx = Z_INFLATE_CONTEXT_P(return_value);
895
896 ctx->Z.zalloc = php_zlib_alloc;
897 ctx->Z.zfree = php_zlib_free;
898 ctx->inflateDict = dict;
899 ctx->inflateDictlen = dictlen;
900 ctx->status = Z_OK;
901
902 if (encoding < 0) {
903 encoding += 15 - window;
904 } else {
905 encoding -= 15 - window;
906 }
907
908 if (inflateInit2(&ctx->Z, encoding) != Z_OK) {
909 zval_ptr_dtor(return_value);
910 php_error_docref(NULL, E_WARNING, "Failed allocating zlib.inflate context");
911 RETURN_FALSE;
912 }
913
914 if (encoding == PHP_ZLIB_ENCODING_RAW && dictlen > 0) {
915 switch (inflateSetDictionary(&ctx->Z, (Bytef *) ctx->inflateDict, ctx->inflateDictlen)) {
916 case Z_OK:
917 efree(ctx->inflateDict);
918 ctx->inflateDict = NULL;
919 break;
920 case Z_DATA_ERROR:
921 php_error_docref(NULL, E_WARNING, "Dictionary does not match expected dictionary (incorrect adler32 hash)");
922 efree(ctx->inflateDict);
923 ctx->inflateDict = NULL;
924 break;
925 EMPTY_SWITCH_DEFAULT_CASE()
926 }
927 }
928 }
929 /* }}} */
930
931 /* {{{ Incrementally inflate encoded data in the specified context */
PHP_FUNCTION(inflate_add)932 PHP_FUNCTION(inflate_add)
933 {
934 zend_string *out;
935 char *in_buf;
936 size_t in_len, buffer_used = 0, CHUNK_SIZE = 8192;
937 zval *res;
938 php_zlib_context *ctx;
939 zend_long flush_type = Z_SYNC_FLUSH;
940 int status;
941
942 if (SUCCESS != zend_parse_parameters(ZEND_NUM_ARGS(), "Os|l", &res, inflate_context_ce, &in_buf, &in_len, &flush_type)) {
943 RETURN_THROWS();
944 }
945
946 ctx = Z_INFLATE_CONTEXT_P(res);
947
948 switch (flush_type) {
949 case Z_NO_FLUSH:
950 case Z_PARTIAL_FLUSH:
951 case Z_SYNC_FLUSH:
952 case Z_FULL_FLUSH:
953 case Z_BLOCK:
954 case Z_FINISH:
955 break;
956
957 default:
958 zend_argument_value_error(3, "must be one of ZLIB_NO_FLUSH, ZLIB_PARTIAL_FLUSH, ZLIB_SYNC_FLUSH, ZLIB_FULL_FLUSH, ZLIB_BLOCK, or ZLIB_FINISH");
959 RETURN_THROWS();
960 }
961
962 /* Lazy-resetting the zlib stream so ctx->total_in remains available until the next inflate_add() call. */
963 if (ctx->status == Z_STREAM_END)
964 {
965 ctx->status = Z_OK;
966 inflateReset(&ctx->Z);
967 }
968
969 if (in_len <= 0 && flush_type != Z_FINISH) {
970 RETURN_EMPTY_STRING();
971 }
972
973 out = zend_string_alloc((in_len > CHUNK_SIZE) ? in_len : CHUNK_SIZE, 0);
974 ctx->Z.next_in = (Bytef *) in_buf;
975 ctx->Z.next_out = (Bytef *) ZSTR_VAL(out);
976 ctx->Z.avail_in = in_len;
977 ctx->Z.avail_out = ZSTR_LEN(out);
978
979 do {
980 status = inflate(&ctx->Z, flush_type);
981 buffer_used = ZSTR_LEN(out) - ctx->Z.avail_out;
982
983 ctx->status = status; /* Save status for exposing to userspace */
984
985 switch (status) {
986 case Z_OK:
987 if (ctx->Z.avail_out == 0) {
988 /* more output buffer space needed; realloc and try again */
989 out = zend_string_realloc(out, ZSTR_LEN(out) + CHUNK_SIZE, 0);
990 ctx->Z.avail_out = CHUNK_SIZE;
991 ctx->Z.next_out = (Bytef *) ZSTR_VAL(out) + buffer_used;
992 break;
993 } else {
994 goto complete;
995 }
996 case Z_STREAM_END:
997 goto complete;
998 case Z_BUF_ERROR:
999 if (flush_type == Z_FINISH && ctx->Z.avail_out == 0) {
1000 /* more output buffer space needed; realloc and try again */
1001 out = zend_string_realloc(out, ZSTR_LEN(out) + CHUNK_SIZE, 0);
1002 ctx->Z.avail_out = CHUNK_SIZE;
1003 ctx->Z.next_out = (Bytef *) ZSTR_VAL(out) + buffer_used;
1004 break;
1005 } else {
1006 /* No more input data; we're finished */
1007 goto complete;
1008 }
1009 case Z_NEED_DICT:
1010 if (ctx->inflateDict) {
1011 switch (inflateSetDictionary(&ctx->Z, (Bytef *) ctx->inflateDict, ctx->inflateDictlen)) {
1012 case Z_OK:
1013 efree(ctx->inflateDict);
1014 ctx->inflateDict = NULL;
1015 break;
1016 case Z_DATA_ERROR:
1017 efree(ctx->inflateDict);
1018 ctx->inflateDict = NULL;
1019 zend_string_release_ex(out, 0);
1020 php_error_docref(NULL, E_WARNING, "Dictionary does not match expected dictionary (incorrect adler32 hash)");
1021 RETURN_FALSE;
1022 EMPTY_SWITCH_DEFAULT_CASE()
1023 }
1024 break;
1025 } else {
1026 php_error_docref(NULL, E_WARNING, "Inflating this data requires a preset dictionary, please specify it in the options array of inflate_init()");
1027 RETURN_FALSE;
1028 }
1029 default:
1030 zend_string_release_ex(out, 0);
1031 php_error_docref(NULL, E_WARNING, "%s", zError(status));
1032 RETURN_FALSE;
1033 }
1034 } while (1);
1035
1036 complete:
1037 out = zend_string_realloc(out, buffer_used, 0);
1038 ZSTR_VAL(out)[buffer_used] = 0;
1039 RETURN_STR(out);
1040 }
1041 /* }}} */
1042
1043 /* {{{ Get decompression status, usually returns either ZLIB_OK or ZLIB_STREAM_END. */
PHP_FUNCTION(inflate_get_status)1044 PHP_FUNCTION(inflate_get_status)
1045 {
1046 zval *res;
1047 php_zlib_context *ctx;
1048
1049 if (zend_parse_parameters(ZEND_NUM_ARGS(), "O", &res, inflate_context_ce) != SUCCESS) {
1050 RETURN_THROWS();
1051 }
1052
1053 ctx = Z_INFLATE_CONTEXT_P(res);
1054
1055 RETURN_LONG(ctx->status);
1056 }
1057 /* }}} */
1058
1059 /* {{{ Get number of bytes read so far. */
PHP_FUNCTION(inflate_get_read_len)1060 PHP_FUNCTION(inflate_get_read_len)
1061 {
1062 zval *res;
1063 php_zlib_context *ctx;
1064
1065 if (zend_parse_parameters(ZEND_NUM_ARGS(), "O", &res, inflate_context_ce) != SUCCESS) {
1066 RETURN_THROWS();
1067 }
1068
1069 ctx = Z_INFLATE_CONTEXT_P(res);
1070
1071 RETURN_LONG(ctx->Z.total_in);
1072 }
1073 /* }}} */
1074
1075 /* {{{ Initialize an incremental deflate context using the specified encoding */
PHP_FUNCTION(deflate_init)1076 PHP_FUNCTION(deflate_init)
1077 {
1078 php_zlib_context *ctx;
1079 zend_long encoding, level = -1, memory = 8, window = 15, strategy = Z_DEFAULT_STRATEGY;
1080 char *dict = NULL;
1081 size_t dictlen = 0;
1082 HashTable *options = NULL;
1083 zval *option_buffer;
1084
1085 if (SUCCESS != zend_parse_parameters(ZEND_NUM_ARGS(), "l|H", &encoding, &options)) {
1086 RETURN_THROWS();
1087 }
1088
1089 if (options && (option_buffer = zend_hash_str_find(options, ZEND_STRL("level"))) != NULL) {
1090 level = zval_get_long(option_buffer);
1091 }
1092 if (level < -1 || level > 9) {
1093 zend_value_error("deflate_init(): \"level\" option must be between -1 and 9");
1094 RETURN_THROWS();
1095 }
1096
1097 if (options && (option_buffer = zend_hash_str_find(options, ZEND_STRL("memory"))) != NULL) {
1098 memory = zval_get_long(option_buffer);
1099 }
1100 if (memory < 1 || memory > 9) {
1101 zend_value_error("deflate_init(): \"memory\" option must be between 1 and 9");
1102 RETURN_THROWS();
1103 }
1104
1105 if (options && (option_buffer = zend_hash_str_find(options, ZEND_STRL("window"))) != NULL) {
1106 window = zval_get_long(option_buffer);
1107 }
1108 if (window < 8 || window > 15) {
1109 zend_value_error("deflate_init(): \"window\" option must be between 8 and 15");
1110 RETURN_THROWS();
1111 }
1112
1113 if (options && (option_buffer = zend_hash_str_find(options, ZEND_STRL("strategy"))) != NULL) {
1114 strategy = zval_get_long(option_buffer);
1115 }
1116 switch (strategy) {
1117 case Z_FILTERED:
1118 case Z_HUFFMAN_ONLY:
1119 case Z_RLE:
1120 case Z_FIXED:
1121 case Z_DEFAULT_STRATEGY:
1122 break;
1123 default:
1124 zend_value_error("deflate_init(): \"strategy\" option must be one of ZLIB_FILTERED, ZLIB_HUFFMAN_ONLY, ZLIB_RLE, ZLIB_FIXED, or ZLIB_DEFAULT_STRATEGY");
1125 RETURN_THROWS();
1126 }
1127
1128 if (!zlib_create_dictionary_string(options, &dict, &dictlen)) {
1129 RETURN_THROWS();
1130 }
1131
1132 switch (encoding) {
1133 case PHP_ZLIB_ENCODING_RAW:
1134 case PHP_ZLIB_ENCODING_GZIP:
1135 case PHP_ZLIB_ENCODING_DEFLATE:
1136 break;
1137 default:
1138 zend_argument_value_error(1, "must be one of ZLIB_ENCODING_RAW, ZLIB_ENCODING_GZIP, or ZLIB_ENCODING_DEFLATE");
1139 RETURN_THROWS();
1140 }
1141
1142 object_init_ex(return_value, deflate_context_ce);
1143 ctx = Z_DEFLATE_CONTEXT_P(return_value);
1144
1145 ctx->Z.zalloc = php_zlib_alloc;
1146 ctx->Z.zfree = php_zlib_free;
1147
1148 if (encoding < 0) {
1149 encoding += 15 - window;
1150 } else {
1151 encoding -= 15 - window;
1152 }
1153
1154 if (deflateInit2(&ctx->Z, level, Z_DEFLATED, encoding, memory, strategy) != Z_OK) {
1155 zval_ptr_dtor(return_value);
1156 php_error_docref(NULL, E_WARNING, "Failed allocating zlib.deflate context");
1157 RETURN_FALSE;
1158 }
1159
1160 if (dict) {
1161 int success = deflateSetDictionary(&ctx->Z, (Bytef *) dict, dictlen);
1162 ZEND_ASSERT(success == Z_OK);
1163 efree(dict);
1164 }
1165 }
1166 /* }}} */
1167
1168 /* {{{ Incrementally deflate data in the specified context */
PHP_FUNCTION(deflate_add)1169 PHP_FUNCTION(deflate_add)
1170 {
1171 zend_string *out;
1172 char *in_buf;
1173 size_t in_len, out_size, buffer_used;
1174 zval *res;
1175 php_zlib_context *ctx;
1176 zend_long flush_type = Z_SYNC_FLUSH;
1177 int status;
1178
1179 if (SUCCESS != zend_parse_parameters(ZEND_NUM_ARGS(), "Os|l", &res, deflate_context_ce, &in_buf, &in_len, &flush_type)) {
1180 RETURN_THROWS();
1181 }
1182
1183 ctx = Z_DEFLATE_CONTEXT_P(res);
1184
1185 switch (flush_type) {
1186 case Z_BLOCK:
1187 #if ZLIB_VERNUM < 0x1240L
1188 zend_throw_error(NULL, "zlib >= 1.2.4 required for BLOCK deflate; current version: %s", ZLIB_VERSION);
1189 RETURN_THROWS();
1190 #endif
1191 case Z_NO_FLUSH:
1192 case Z_PARTIAL_FLUSH:
1193 case Z_SYNC_FLUSH:
1194 case Z_FULL_FLUSH:
1195 case Z_FINISH:
1196 break;
1197
1198 default:
1199 zend_argument_value_error(3, "must be one of ZLIB_NO_FLUSH, ZLIB_PARTIAL_FLUSH, ZLIB_SYNC_FLUSH, ZLIB_FULL_FLUSH, ZLIB_BLOCK, or ZLIB_FINISH");
1200 RETURN_THROWS();
1201 }
1202
1203 if (in_len <= 0 && flush_type != Z_FINISH) {
1204 RETURN_EMPTY_STRING();
1205 }
1206
1207 out_size = PHP_ZLIB_BUFFER_SIZE_GUESS(in_len);
1208 out_size = (out_size < 64) ? 64 : out_size;
1209 out = zend_string_alloc(out_size, 0);
1210
1211 ctx->Z.next_in = (Bytef *) in_buf;
1212 ctx->Z.next_out = (Bytef *) ZSTR_VAL(out);
1213 ctx->Z.avail_in = in_len;
1214 ctx->Z.avail_out = ZSTR_LEN(out);
1215
1216 buffer_used = 0;
1217
1218 do {
1219 if (ctx->Z.avail_out == 0) {
1220 /* more output buffer space needed; realloc and try again */
1221 /* adding 64 more bytes solved every issue I have seen */
1222 out = zend_string_realloc(out, ZSTR_LEN(out) + 64, 0);
1223 ctx->Z.avail_out = 64;
1224 ctx->Z.next_out = (Bytef *) ZSTR_VAL(out) + buffer_used;
1225 }
1226 status = deflate(&ctx->Z, flush_type);
1227 buffer_used = ZSTR_LEN(out) - ctx->Z.avail_out;
1228 } while (status == Z_OK && ctx->Z.avail_out == 0);
1229
1230 switch (status) {
1231 case Z_OK:
1232 ZSTR_LEN(out) = (char *) ctx->Z.next_out - ZSTR_VAL(out);
1233 ZSTR_VAL(out)[ZSTR_LEN(out)] = 0;
1234 RETURN_STR(out);
1235 break;
1236 case Z_STREAM_END:
1237 ZSTR_LEN(out) = (char *) ctx->Z.next_out - ZSTR_VAL(out);
1238 ZSTR_VAL(out)[ZSTR_LEN(out)] = 0;
1239 deflateReset(&ctx->Z);
1240 RETURN_STR(out);
1241 break;
1242 default:
1243 zend_string_release_ex(out, 0);
1244 php_error_docref(NULL, E_WARNING, "zlib error (%s)", zError(status));
1245 RETURN_FALSE;
1246 }
1247 }
1248 /* }}} */
1249
1250 #ifdef COMPILE_DL_ZLIB
1251 #ifdef ZTS
1252 ZEND_TSRMLS_CACHE_DEFINE()
1253 #endif
ZEND_GET_MODULE(php_zlib)1254 ZEND_GET_MODULE(php_zlib)
1255 #endif
1256
1257 /* {{{ OnUpdate_zlib_output_compression */
1258 static PHP_INI_MH(OnUpdate_zlib_output_compression)
1259 {
1260 int int_value;
1261 char *ini_value;
1262 if (new_value == NULL) {
1263 return FAILURE;
1264 }
1265
1266 if (zend_string_equals_literal_ci(new_value, "off")) {
1267 int_value = 0;
1268 } else if (zend_string_equals_literal_ci(new_value, "on")) {
1269 int_value = 1;
1270 } else {
1271 int_value = (int) zend_ini_parse_quantity_warn(new_value, entry->name);
1272 }
1273 ini_value = zend_ini_string("output_handler", sizeof("output_handler") - 1, 0);
1274
1275 if (ini_value && *ini_value && int_value) {
1276 php_error_docref("ref.outcontrol", E_CORE_ERROR, "Cannot use both zlib.output_compression and output_handler together!!");
1277 return FAILURE;
1278 }
1279 if (stage == PHP_INI_STAGE_RUNTIME) {
1280 int status = php_output_get_status();
1281 if (status & PHP_OUTPUT_SENT) {
1282 php_error_docref("ref.outcontrol", E_WARNING, "Cannot change zlib.output_compression - headers already sent");
1283 return FAILURE;
1284 }
1285 }
1286
1287 zend_long *p = (zend_long *) ZEND_INI_GET_ADDR();
1288 *p = int_value;
1289
1290 ZLIBG(output_compression) = ZLIBG(output_compression_default);
1291 if (stage == PHP_INI_STAGE_RUNTIME && int_value) {
1292 if (!php_output_handler_started(ZEND_STRL(PHP_ZLIB_OUTPUT_HANDLER_NAME))) {
1293 php_zlib_output_compression_start();
1294 }
1295 }
1296
1297 return SUCCESS;
1298 }
1299 /* }}} */
1300
1301 /* {{{ OnUpdate_zlib_output_handler */
PHP_INI_MH(OnUpdate_zlib_output_handler)1302 static PHP_INI_MH(OnUpdate_zlib_output_handler)
1303 {
1304 if (stage == PHP_INI_STAGE_RUNTIME && (php_output_get_status() & PHP_OUTPUT_SENT)) {
1305 php_error_docref("ref.outcontrol", E_WARNING, "Cannot change zlib.output_handler - headers already sent");
1306 return FAILURE;
1307 }
1308
1309 return OnUpdateString(entry, new_value, mh_arg1, mh_arg2, mh_arg3, stage);
1310 }
1311 /* }}} */
1312
1313 /* {{{ INI */
1314 PHP_INI_BEGIN()
1315 STD_PHP_INI_BOOLEAN("zlib.output_compression", "0", PHP_INI_ALL, OnUpdate_zlib_output_compression, output_compression_default, zend_zlib_globals, zlib_globals)
1316 STD_PHP_INI_ENTRY("zlib.output_compression_level", "-1", PHP_INI_ALL, OnUpdateLong, output_compression_level, zend_zlib_globals, zlib_globals)
1317 STD_PHP_INI_ENTRY("zlib.output_handler", "", PHP_INI_ALL, OnUpdate_zlib_output_handler, output_handler, zend_zlib_globals, zlib_globals)
PHP_INI_END()1318 PHP_INI_END()
1319
1320 /* }}} */
1321
1322 /* {{{ PHP_MINIT_FUNCTION */
1323 static PHP_MINIT_FUNCTION(zlib)
1324 {
1325 php_register_url_stream_wrapper("compress.zlib", &php_stream_gzip_wrapper);
1326 php_stream_filter_register_factory("zlib.*", &php_zlib_filter_factory);
1327
1328 php_output_handler_alias_register(ZEND_STRL("ob_gzhandler"), php_zlib_output_handler_init);
1329 php_output_handler_conflict_register(ZEND_STRL("ob_gzhandler"), php_zlib_output_conflict_check);
1330 php_output_handler_conflict_register(ZEND_STRL(PHP_ZLIB_OUTPUT_HANDLER_NAME), php_zlib_output_conflict_check);
1331
1332 inflate_context_ce = register_class_InflateContext();
1333 inflate_context_ce->create_object = inflate_context_create_object;
1334 inflate_context_ce->default_object_handlers = &inflate_context_object_handlers;
1335
1336 memcpy(&inflate_context_object_handlers, &std_object_handlers, sizeof(zend_object_handlers));
1337 inflate_context_object_handlers.offset = XtOffsetOf(php_zlib_context, std);
1338 inflate_context_object_handlers.free_obj = inflate_context_free_obj;
1339 inflate_context_object_handlers.get_constructor = inflate_context_get_constructor;
1340 inflate_context_object_handlers.clone_obj = NULL;
1341 inflate_context_object_handlers.compare = zend_objects_not_comparable;
1342
1343 deflate_context_ce = register_class_DeflateContext();
1344 deflate_context_ce->create_object = deflate_context_create_object;
1345 deflate_context_ce->default_object_handlers = &deflate_context_object_handlers;
1346
1347 memcpy(&deflate_context_object_handlers, &std_object_handlers, sizeof(zend_object_handlers));
1348 deflate_context_object_handlers.offset = XtOffsetOf(php_zlib_context, std);
1349 deflate_context_object_handlers.free_obj = deflate_context_free_obj;
1350 deflate_context_object_handlers.get_constructor = deflate_context_get_constructor;
1351 deflate_context_object_handlers.clone_obj = NULL;
1352 deflate_context_object_handlers.compare = zend_objects_not_comparable;
1353
1354 register_zlib_symbols(module_number);
1355
1356 REGISTER_INI_ENTRIES();
1357 return SUCCESS;
1358 }
1359 /* }}} */
1360
1361 /* {{{ PHP_MSHUTDOWN_FUNCTION */
PHP_MSHUTDOWN_FUNCTION(zlib)1362 static PHP_MSHUTDOWN_FUNCTION(zlib)
1363 {
1364 php_unregister_url_stream_wrapper("zlib");
1365 php_stream_filter_unregister_factory("zlib.*");
1366
1367 UNREGISTER_INI_ENTRIES();
1368
1369 return SUCCESS;
1370 }
1371 /* }}} */
1372
1373 /* {{{ PHP_RINIT_FUNCTION */
PHP_RINIT_FUNCTION(zlib)1374 static PHP_RINIT_FUNCTION(zlib)
1375 {
1376 ZLIBG(compression_coding) = 0;
1377 if (!ZLIBG(handler_registered)) {
1378 ZLIBG(output_compression) = ZLIBG(output_compression_default);
1379 php_zlib_output_compression_start();
1380 }
1381
1382 return SUCCESS;
1383 }
1384 /* }}} */
1385
1386 /* {{{ PHP_RSHUTDOWN_FUNCTION */
PHP_RSHUTDOWN_FUNCTION(zlib)1387 static PHP_RSHUTDOWN_FUNCTION(zlib)
1388 {
1389 php_zlib_cleanup_ob_gzhandler_mess();
1390 ZLIBG(handler_registered) = 0;
1391
1392 return SUCCESS;
1393 }
1394 /* }}} */
1395
1396 /* {{{ PHP_MINFO_FUNCTION */
PHP_MINFO_FUNCTION(zlib)1397 static PHP_MINFO_FUNCTION(zlib)
1398 {
1399 php_info_print_table_start();
1400 php_info_print_table_row(2, "ZLib Support", "enabled");
1401 php_info_print_table_row(2, "Stream Wrapper", "compress.zlib://");
1402 php_info_print_table_row(2, "Stream Filter", "zlib.inflate, zlib.deflate");
1403 php_info_print_table_row(2, "Compiled Version", ZLIB_VERSION);
1404 php_info_print_table_row(2, "Linked Version", (char *) zlibVersion());
1405 php_info_print_table_end();
1406
1407 DISPLAY_INI_ENTRIES();
1408 }
1409 /* }}} */
1410
1411 /* {{{ ZEND_MODULE_GLOBALS_CTOR */
PHP_GINIT_FUNCTION(zlib)1412 static PHP_GINIT_FUNCTION(zlib)
1413 {
1414 #if defined(COMPILE_DL_ZLIB) && defined(ZTS)
1415 ZEND_TSRMLS_CACHE_UPDATE();
1416 #endif
1417 zlib_globals->ob_gzhandler = NULL;
1418 zlib_globals->handler_registered = 0;
1419 }
1420 /* }}} */
1421
1422 /* {{{ php_zlib_module_entry */
1423 zend_module_entry php_zlib_module_entry = {
1424 STANDARD_MODULE_HEADER,
1425 "zlib",
1426 ext_functions,
1427 PHP_MINIT(zlib),
1428 PHP_MSHUTDOWN(zlib),
1429 PHP_RINIT(zlib),
1430 PHP_RSHUTDOWN(zlib),
1431 PHP_MINFO(zlib),
1432 PHP_ZLIB_VERSION,
1433 PHP_MODULE_GLOBALS(zlib),
1434 PHP_GINIT(zlib),
1435 NULL,
1436 NULL,
1437 STANDARD_MODULE_PROPERTIES_EX
1438 };
1439 /* }}} */
1440
