1/*
2   +----------------------------------------------------------------------+
3   | PHP Version 7                                                        |
4   +----------------------------------------------------------------------+
5   | Copyright (c) 1997-2015 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   | Authors: Sascha Schumann <sascha@schumann.cx>                        |
16   |          Derick Rethans <derick@derickrethans.nl>                    |
17   +----------------------------------------------------------------------+
18 */
19/* $Id$ */
20
21#ifdef HAVE_CONFIG_H
22#include "config.h"
23#endif
24
25#include "php.h"
26
27#if HAVE_LIBMCRYPT
28
29#if PHP_WIN32
30# include "win32/winutil.h"
31#endif
32
33#include "php_mcrypt.h"
34#include "fcntl.h"
35
36#define NON_FREE
37#define MCRYPT2
38#include "mcrypt.h"
39#include "php_ini.h"
40#include "php_globals.h"
41#include "ext/standard/info.h"
42#include "ext/standard/php_rand.h"
43#include "zend_smart_str.h"
44#include "php_mcrypt_filter.h"
45
46static int le_mcrypt;
47
48typedef struct _php_mcrypt {
49    MCRYPT td;
50    zend_bool init;
51} php_mcrypt;
52
53/* {{{ arginfo */
54ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_module_open, 0, 0, 4)
55    ZEND_ARG_INFO(0, cipher)
56    ZEND_ARG_INFO(0, cipher_directory)
57    ZEND_ARG_INFO(0, mode)
58    ZEND_ARG_INFO(0, mode_directory)
59ZEND_END_ARG_INFO()
60
61ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_generic_init, 0, 0, 3)
62    ZEND_ARG_INFO(0, td)
63    ZEND_ARG_INFO(0, key)
64    ZEND_ARG_INFO(0, iv)
65ZEND_END_ARG_INFO()
66
67ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_generic, 0, 0, 2)
68    ZEND_ARG_INFO(0, td)
69    ZEND_ARG_INFO(0, data)
70ZEND_END_ARG_INFO()
71
72ZEND_BEGIN_ARG_INFO_EX(arginfo_mdecrypt_generic, 0, 0, 2)
73    ZEND_ARG_INFO(0, td)
74    ZEND_ARG_INFO(0, data)
75ZEND_END_ARG_INFO()
76
77ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_enc_get_supported_key_sizes, 0, 0, 1)
78    ZEND_ARG_INFO(0, td)
79ZEND_END_ARG_INFO()
80
81ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_enc_self_test, 0, 0, 1)
82    ZEND_ARG_INFO(0, td)
83ZEND_END_ARG_INFO()
84
85ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_module_close, 0, 0, 1)
86    ZEND_ARG_INFO(0, td)
87ZEND_END_ARG_INFO()
88
89ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_generic_deinit, 0, 0, 1)
90    ZEND_ARG_INFO(0, td)
91ZEND_END_ARG_INFO()
92
93ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_enc_is_block_algorithm_mode, 0, 0, 1)
94    ZEND_ARG_INFO(0, td)
95ZEND_END_ARG_INFO()
96
97ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_enc_is_block_algorithm, 0, 0, 1)
98    ZEND_ARG_INFO(0, td)
99ZEND_END_ARG_INFO()
100
101ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_enc_is_block_mode, 0, 0, 1)
102    ZEND_ARG_INFO(0, td)
103ZEND_END_ARG_INFO()
104
105ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_enc_get_block_size, 0, 0, 1)
106    ZEND_ARG_INFO(0, td)
107ZEND_END_ARG_INFO()
108
109ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_enc_get_key_size, 0, 0, 1)
110    ZEND_ARG_INFO(0, td)
111ZEND_END_ARG_INFO()
112
113ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_enc_get_iv_size, 0, 0, 1)
114    ZEND_ARG_INFO(0, td)
115ZEND_END_ARG_INFO()
116
117ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_enc_get_algorithms_name, 0, 0, 1)
118    ZEND_ARG_INFO(0, td)
119ZEND_END_ARG_INFO()
120
121ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_enc_get_modes_name, 0, 0, 1)
122    ZEND_ARG_INFO(0, td)
123ZEND_END_ARG_INFO()
124
125ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_module_self_test, 0, 0, 1)
126    ZEND_ARG_INFO(0, algorithm)
127    ZEND_ARG_INFO(0, lib_dir)
128ZEND_END_ARG_INFO()
129
130ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_module_is_block_algorithm_mode, 0, 0, 1)
131    ZEND_ARG_INFO(0, mode)
132    ZEND_ARG_INFO(0, lib_dir)
133ZEND_END_ARG_INFO()
134
135ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_module_is_block_algorithm, 0, 0, 1)
136    ZEND_ARG_INFO(0, algorithm)
137    ZEND_ARG_INFO(0, lib_dir)
138ZEND_END_ARG_INFO()
139
140ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_module_is_block_mode, 0, 0, 1)
141    ZEND_ARG_INFO(0, mode)
142    ZEND_ARG_INFO(0, lib_dir)
143ZEND_END_ARG_INFO()
144
145ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_module_get_algo_block_size, 0, 0, 1)
146    ZEND_ARG_INFO(0, algorithm)
147    ZEND_ARG_INFO(0, lib_dir)
148ZEND_END_ARG_INFO()
149
150ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_module_get_algo_key_size, 0, 0, 1)
151    ZEND_ARG_INFO(0, algorithm)
152    ZEND_ARG_INFO(0, lib_dir)
153ZEND_END_ARG_INFO()
154
155ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_module_get_supported_key_sizes, 0, 0, 1)
156    ZEND_ARG_INFO(0, algorithm)
157    ZEND_ARG_INFO(0, lib_dir)
158ZEND_END_ARG_INFO()
159
160ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_list_algorithms, 0, 0, 0)
161    ZEND_ARG_INFO(0, lib_dir)
162ZEND_END_ARG_INFO()
163
164ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_list_modes, 0, 0, 0)
165    ZEND_ARG_INFO(0, lib_dir)
166ZEND_END_ARG_INFO()
167
168ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_get_key_size, 0, 0, 2)
169    ZEND_ARG_INFO(0, cipher)
170    ZEND_ARG_INFO(0, module)
171ZEND_END_ARG_INFO()
172
173ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_get_block_size, 0, 0, 2)
174    ZEND_ARG_INFO(0, cipher)
175    ZEND_ARG_INFO(0, module)
176ZEND_END_ARG_INFO()
177
178ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_get_iv_size, 0, 0, 2)
179    ZEND_ARG_INFO(0, cipher)
180    ZEND_ARG_INFO(0, module)
181ZEND_END_ARG_INFO()
182
183ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_get_cipher_name, 0, 0, 1)
184    ZEND_ARG_INFO(0, cipher)
185ZEND_END_ARG_INFO()
186
187ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_encrypt, 0, 0, 5)
188    ZEND_ARG_INFO(0, cipher)
189    ZEND_ARG_INFO(0, key)
190    ZEND_ARG_INFO(0, data)
191    ZEND_ARG_INFO(0, mode)
192    ZEND_ARG_INFO(0, iv)
193ZEND_END_ARG_INFO()
194
195ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_decrypt, 0, 0, 5)
196    ZEND_ARG_INFO(0, cipher)
197    ZEND_ARG_INFO(0, key)
198    ZEND_ARG_INFO(0, data)
199    ZEND_ARG_INFO(0, mode)
200    ZEND_ARG_INFO(0, iv)
201ZEND_END_ARG_INFO()
202
203ZEND_BEGIN_ARG_INFO_EX(arginfo_mcrypt_create_iv, 0, 0, 1)
204    ZEND_ARG_INFO(0, size)
205    ZEND_ARG_INFO(0, source)
206ZEND_END_ARG_INFO()
207/* }}} */
208
209const zend_function_entry mcrypt_functions[] = { /* {{{ */
210    PHP_FE(mcrypt_get_key_size,     arginfo_mcrypt_get_key_size)
211    PHP_FE(mcrypt_get_block_size,   arginfo_mcrypt_get_block_size)
212    PHP_FE(mcrypt_get_cipher_name,  arginfo_mcrypt_get_cipher_name)
213    PHP_FE(mcrypt_create_iv,        arginfo_mcrypt_create_iv)
214
215    PHP_FE(mcrypt_list_algorithms,  arginfo_mcrypt_list_algorithms)
216    PHP_FE(mcrypt_list_modes,       arginfo_mcrypt_list_modes)
217    PHP_FE(mcrypt_get_iv_size,      arginfo_mcrypt_get_iv_size)
218    PHP_FE(mcrypt_encrypt,          arginfo_mcrypt_encrypt)
219    PHP_FE(mcrypt_decrypt,          arginfo_mcrypt_decrypt)
220
221    PHP_FE(mcrypt_module_open,      arginfo_mcrypt_module_open)
222    PHP_FE(mcrypt_generic_init,     arginfo_mcrypt_generic_init)
223    PHP_FE(mcrypt_generic,          arginfo_mcrypt_generic)
224    PHP_FE(mdecrypt_generic,        arginfo_mdecrypt_generic)
225    PHP_FE(mcrypt_generic_deinit,   arginfo_mcrypt_generic_deinit)
226
227    PHP_FE(mcrypt_enc_self_test,    arginfo_mcrypt_enc_self_test)
228    PHP_FE(mcrypt_enc_is_block_algorithm_mode, arginfo_mcrypt_enc_is_block_algorithm_mode)
229    PHP_FE(mcrypt_enc_is_block_algorithm,   arginfo_mcrypt_enc_is_block_algorithm)
230    PHP_FE(mcrypt_enc_is_block_mode,        arginfo_mcrypt_enc_is_block_mode)
231    PHP_FE(mcrypt_enc_get_block_size,       arginfo_mcrypt_enc_get_block_size)
232    PHP_FE(mcrypt_enc_get_key_size,         arginfo_mcrypt_enc_get_key_size)
233    PHP_FE(mcrypt_enc_get_supported_key_sizes, arginfo_mcrypt_enc_get_supported_key_sizes)
234    PHP_FE(mcrypt_enc_get_iv_size,          arginfo_mcrypt_enc_get_iv_size)
235    PHP_FE(mcrypt_enc_get_algorithms_name,  arginfo_mcrypt_enc_get_algorithms_name)
236    PHP_FE(mcrypt_enc_get_modes_name,       arginfo_mcrypt_enc_get_modes_name)
237    PHP_FE(mcrypt_module_self_test,         arginfo_mcrypt_module_self_test)
238
239    PHP_FE(mcrypt_module_is_block_algorithm_mode,   arginfo_mcrypt_module_is_block_algorithm_mode)
240    PHP_FE(mcrypt_module_is_block_algorithm,        arginfo_mcrypt_module_is_block_algorithm)
241    PHP_FE(mcrypt_module_is_block_mode,             arginfo_mcrypt_module_is_block_mode)
242    PHP_FE(mcrypt_module_get_algo_block_size,       arginfo_mcrypt_module_get_algo_block_size)
243    PHP_FE(mcrypt_module_get_algo_key_size,         arginfo_mcrypt_module_get_algo_key_size)
244    PHP_FE(mcrypt_module_get_supported_key_sizes,   arginfo_mcrypt_module_get_supported_key_sizes)
245
246    PHP_FE(mcrypt_module_close,                     arginfo_mcrypt_module_close)
247    PHP_FE_END
248};
249/* }}} */
250
251static PHP_MINFO_FUNCTION(mcrypt);
252static PHP_MINIT_FUNCTION(mcrypt);
253static PHP_MSHUTDOWN_FUNCTION(mcrypt);
254static PHP_GINIT_FUNCTION(mcrypt);
255static PHP_GSHUTDOWN_FUNCTION(mcrypt);
256
257ZEND_DECLARE_MODULE_GLOBALS(mcrypt)
258
259zend_module_entry mcrypt_module_entry = {
260    STANDARD_MODULE_HEADER,
261    "mcrypt",
262    mcrypt_functions,
263    PHP_MINIT(mcrypt), PHP_MSHUTDOWN(mcrypt),
264    NULL, NULL,
265    PHP_MINFO(mcrypt),
266    PHP_MCRYPT_VERSION,
267    PHP_MODULE_GLOBALS(mcrypt),
268    PHP_GINIT(mcrypt),
269    PHP_GSHUTDOWN(mcrypt),
270    NULL,
271    STANDARD_MODULE_PROPERTIES_EX
272};
273
274#ifdef COMPILE_DL_MCRYPT
275#ifdef ZTS
276ZEND_TSRMLS_CACHE_DEFINE();
277#endif
278ZEND_GET_MODULE(mcrypt)
279#endif
280
281#define MCRYPT_ENCRYPT 0
282#define MCRYPT_DECRYPT 1
283
284typedef enum {
285    RANDOM = 0,
286    URANDOM,
287    RAND
288} iv_source;
289
290#define MCRYPT_GET_INI                                          \
291    cipher_dir_string = MCG(algorithms_dir);                    \
292    module_dir_string = MCG(modes_dir);
293
294/*
295 * #warning is not ANSI C
296 * #warning Invalidate resource if the param count is wrong, or other problems
297 * #warning occurred during functions.
298 */
299
300#define MCRYPT_GET_CRYPT_ARGS                                       \
301    if (zend_parse_parameters(ZEND_NUM_ARGS(), "sssz|s",    \
302        &cipher, &cipher_len, &key, &key_len, &data, &data_len, &mode, &iv, &iv_len) == FAILURE) {  \
303        return;     \
304    }
305
306#define MCRYPT_GET_TD_ARG                                       \
307    zval *mcryptind;                                            \
308    php_mcrypt *pm;                                                 \
309    if (zend_parse_parameters(ZEND_NUM_ARGS(), "r", &mcryptind) == FAILURE) {           \
310        return;                                                             \
311    }                                                                                       \
312    if ((pm = (php_mcrypt *)zend_fetch_resource(Z_RES_P(mcryptind), "MCrypt", le_mcrypt)) == NULL) { \
313        RETURN_FALSE; \
314    }
315
316#define MCRYPT_GET_MODE_DIR_ARGS(DIRECTORY)                             \
317    char *dir = NULL;                                                   \
318    size_t   dir_len;                                                      \
319    char *module;                                                       \
320    size_t   module_len;                                                   \
321    if (zend_parse_parameters (ZEND_NUM_ARGS(),               \
322        "s|s", &module, &module_len, &dir, &dir_len) == FAILURE) {      \
323        return;                                                         \
324    }
325
326#define MCRYPT_OPEN_MODULE_FAILED "Module initialization failed"
327
328#define MCRYPT_ENTRY2_2_4(a,b) REGISTER_STRING_CONSTANT("MCRYPT_" #a, b, CONST_PERSISTENT)
329#define MCRYPT_ENTRY2_4(a) MCRYPT_ENTRY_NAMED(a, a)
330
331#define PHP_MCRYPT_INIT_CHECK   \
332    if (!pm->init) {    \
333        php_error_docref(NULL, E_WARNING, "Operation disallowed prior to mcrypt_generic_init().");  \
334        RETURN_FALSE;   \
335    }   \
336
337PHP_INI_BEGIN()
338    STD_PHP_INI_ENTRY("mcrypt.algorithms_dir", NULL, PHP_INI_ALL, OnUpdateString, algorithms_dir, zend_mcrypt_globals, mcrypt_globals)
339    STD_PHP_INI_ENTRY("mcrypt.modes_dir",      NULL, PHP_INI_ALL, OnUpdateString, modes_dir, zend_mcrypt_globals, mcrypt_globals)
340PHP_INI_END()
341
342static void php_mcrypt_module_dtor(zend_resource *rsrc) /* {{{ */
343{
344    php_mcrypt *pm = (php_mcrypt *) rsrc->ptr;
345    if (pm) {
346        mcrypt_generic_deinit(pm->td);
347        mcrypt_module_close(pm->td);
348        efree(pm);
349        pm = NULL;
350    }
351}
352/* }}} */
353
354static PHP_GINIT_FUNCTION(mcrypt)
355{/*{{{*/
356#if defined(COMPILE_DL_MCRYPT) && defined(ZTS)
357    ZEND_TSRMLS_CACHE_UPDATE();
358#endif
359    mcrypt_globals->fd[RANDOM] = -1;
360    mcrypt_globals->fd[URANDOM] = -1;
361}/*}}}*/
362
363static PHP_GSHUTDOWN_FUNCTION(mcrypt)
364{/*{{{*/
365    if (mcrypt_globals->fd[RANDOM] > 0) {
366        close(mcrypt_globals->fd[RANDOM]);
367        mcrypt_globals->fd[RANDOM] = -1;
368    }
369
370    if (mcrypt_globals->fd[URANDOM] > 0) {
371        close(mcrypt_globals->fd[URANDOM]);
372        mcrypt_globals->fd[URANDOM] = -1;
373    }
374}/*}}}*/
375
376static PHP_MINIT_FUNCTION(mcrypt) /* {{{ */
377{
378    le_mcrypt = zend_register_list_destructors_ex(php_mcrypt_module_dtor, NULL, "mcrypt", module_number);
379
380    /* modes for mcrypt_??? routines */
381    REGISTER_LONG_CONSTANT("MCRYPT_ENCRYPT", 0, CONST_PERSISTENT);
382    REGISTER_LONG_CONSTANT("MCRYPT_DECRYPT", 1, CONST_PERSISTENT);
383
384    /* sources for mcrypt_create_iv */
385    REGISTER_LONG_CONSTANT("MCRYPT_DEV_RANDOM", RANDOM, CONST_PERSISTENT);
386    REGISTER_LONG_CONSTANT("MCRYPT_DEV_URANDOM", URANDOM, CONST_PERSISTENT);
387    REGISTER_LONG_CONSTANT("MCRYPT_RAND", RAND, CONST_PERSISTENT);
388
389    /* ciphers */
390    MCRYPT_ENTRY2_2_4(3DES, "tripledes");
391    MCRYPT_ENTRY2_2_4(ARCFOUR_IV, "arcfour-iv");
392    MCRYPT_ENTRY2_2_4(ARCFOUR, "arcfour");
393    MCRYPT_ENTRY2_2_4(BLOWFISH, "blowfish");
394    MCRYPT_ENTRY2_2_4(BLOWFISH_COMPAT, "blowfish-compat");
395    MCRYPT_ENTRY2_2_4(CAST_128, "cast-128");
396    MCRYPT_ENTRY2_2_4(CAST_256, "cast-256");
397    MCRYPT_ENTRY2_2_4(CRYPT, "crypt");
398    MCRYPT_ENTRY2_2_4(DES, "des");
399    MCRYPT_ENTRY2_2_4(ENIGNA, "crypt");
400    MCRYPT_ENTRY2_2_4(GOST, "gost");
401    MCRYPT_ENTRY2_2_4(LOKI97, "loki97");
402    MCRYPT_ENTRY2_2_4(PANAMA, "panama");
403    MCRYPT_ENTRY2_2_4(RC2, "rc2");
404    MCRYPT_ENTRY2_2_4(RIJNDAEL_128, "rijndael-128");
405    MCRYPT_ENTRY2_2_4(RIJNDAEL_192, "rijndael-192");
406    MCRYPT_ENTRY2_2_4(RIJNDAEL_256, "rijndael-256");
407    MCRYPT_ENTRY2_2_4(SAFER64, "safer-sk64");
408    MCRYPT_ENTRY2_2_4(SAFER128, "safer-sk128");
409    MCRYPT_ENTRY2_2_4(SAFERPLUS, "saferplus");
410    MCRYPT_ENTRY2_2_4(SERPENT, "serpent");
411    MCRYPT_ENTRY2_2_4(THREEWAY, "threeway");
412    MCRYPT_ENTRY2_2_4(TRIPLEDES, "tripledes");
413    MCRYPT_ENTRY2_2_4(TWOFISH, "twofish");
414    MCRYPT_ENTRY2_2_4(WAKE, "wake");
415    MCRYPT_ENTRY2_2_4(XTEA, "xtea");
416
417    MCRYPT_ENTRY2_2_4(IDEA, "idea");
418    MCRYPT_ENTRY2_2_4(MARS, "mars");
419    MCRYPT_ENTRY2_2_4(RC6, "rc6");
420    MCRYPT_ENTRY2_2_4(SKIPJACK, "skipjack");
421/* modes */
422    MCRYPT_ENTRY2_2_4(MODE_CBC, "cbc");
423    MCRYPT_ENTRY2_2_4(MODE_CFB, "cfb");
424    MCRYPT_ENTRY2_2_4(MODE_ECB, "ecb");
425    MCRYPT_ENTRY2_2_4(MODE_NOFB, "nofb");
426    MCRYPT_ENTRY2_2_4(MODE_OFB, "ofb");
427    MCRYPT_ENTRY2_2_4(MODE_STREAM, "stream");
428    REGISTER_INI_ENTRIES();
429
430    php_stream_filter_register_factory("mcrypt.*", &php_mcrypt_filter_factory);
431    php_stream_filter_register_factory("mdecrypt.*", &php_mcrypt_filter_factory);
432
433    return SUCCESS;
434}
435/* }}} */
436
437static PHP_MSHUTDOWN_FUNCTION(mcrypt) /* {{{ */
438{
439    php_stream_filter_unregister_factory("mcrypt.*");
440    php_stream_filter_unregister_factory("mdecrypt.*");
441
442    UNREGISTER_INI_ENTRIES();
443    return SUCCESS;
444}
445/* }}} */
446
447#include "zend_smart_str.h"
448
449PHP_MINFO_FUNCTION(mcrypt) /* {{{ */
450{
451    char **modules;
452    char mcrypt_api_no[16];
453    int i, count;
454    smart_str tmp1 = {0};
455    smart_str tmp2 = {0};
456
457    modules = mcrypt_list_algorithms(MCG(algorithms_dir), &count);
458    if (count == 0) {
459        smart_str_appends(&tmp1, "none");
460    }
461    for (i = 0; i < count; i++) {
462        smart_str_appends(&tmp1, modules[i]);
463        smart_str_appendc(&tmp1, ' ');
464    }
465    smart_str_0(&tmp1);
466    mcrypt_free_p(modules, count);
467
468    modules = mcrypt_list_modes(MCG(modes_dir), &count);
469    if (count == 0) {
470        smart_str_appends(&tmp2, "none");
471    }
472    for (i = 0; i < count; i++) {
473        smart_str_appends(&tmp2, modules[i]);
474        smart_str_appendc(&tmp2, ' ');
475    }
476    smart_str_0 (&tmp2);
477    mcrypt_free_p (modules, count);
478
479    snprintf (mcrypt_api_no, 16, "%d", MCRYPT_API_VERSION);
480
481    php_info_print_table_start();
482    php_info_print_table_header(2, "mcrypt support", "enabled");
483    php_info_print_table_header(2, "mcrypt_filter support", "enabled");
484    php_info_print_table_row(2, "Version", LIBMCRYPT_VERSION);
485    php_info_print_table_row(2, "Api No", mcrypt_api_no);
486    php_info_print_table_row(2, "Supported ciphers", ZSTR_VAL(tmp1.s));
487    php_info_print_table_row(2, "Supported modes", ZSTR_VAL(tmp2.s));
488    smart_str_free(&tmp1);
489    smart_str_free(&tmp2);
490
491    php_info_print_table_end();
492
493    DISPLAY_INI_ENTRIES();
494}
495/* }}} */
496
497/* {{{ proto resource mcrypt_module_open(string cipher, string cipher_directory, string mode, string mode_directory)
498   Opens the module of the algorithm and the mode to be used */
499PHP_FUNCTION(mcrypt_module_open)
500{
501    char *cipher, *cipher_dir;
502    char *mode,   *mode_dir;
503    size_t   cipher_len, cipher_dir_len;
504    size_t   mode_len,   mode_dir_len;
505    MCRYPT td;
506    php_mcrypt *pm;
507
508    if (zend_parse_parameters (ZEND_NUM_ARGS(), "ssss",
509        &cipher, &cipher_len, &cipher_dir, &cipher_dir_len,
510        &mode,   &mode_len,   &mode_dir,   &mode_dir_len)) {
511        return;
512    }
513
514    td = mcrypt_module_open (
515        cipher,
516        cipher_dir_len > 0 ? cipher_dir : MCG(algorithms_dir),
517        mode,
518        mode_dir_len > 0 ? mode_dir : MCG(modes_dir)
519    );
520
521    if (td == MCRYPT_FAILED) {
522        php_error_docref(NULL, E_WARNING, "Could not open encryption module");
523        RETURN_FALSE;
524    } else {
525        pm = emalloc(sizeof(php_mcrypt));
526        pm->td = td;
527        pm->init = 0;
528        RETURN_RES(zend_register_resource(pm, le_mcrypt));
529    }
530}
531/* }}} */
532
533/* {{{ proto int mcrypt_generic_init(resource td, string key, string iv)
534   This function initializes all buffers for the specific module */
535PHP_FUNCTION(mcrypt_generic_init)
536{
537    char *key, *iv;
538    size_t key_len, iv_len;
539    zval *mcryptind;
540    unsigned char *key_s, *iv_s;
541    int max_key_size, key_size, iv_size;
542    php_mcrypt *pm;
543    int result = 0;
544
545    if (zend_parse_parameters(ZEND_NUM_ARGS(), "rss", &mcryptind, &key, &key_len, &iv, &iv_len) == FAILURE) {
546        return;
547    }
548
549    if ((pm = (php_mcrypt *)zend_fetch_resource(Z_RES_P(mcryptind), "MCrypt", le_mcrypt)) == NULL) {
550        RETURN_FALSE;
551    }
552
553    max_key_size = mcrypt_enc_get_key_size(pm->td);
554    iv_size = mcrypt_enc_get_iv_size(pm->td);
555
556    if (key_len == 0) {
557        php_error_docref(NULL, E_WARNING, "Key size is 0");
558    }
559
560    key_s = emalloc(key_len);
561    memset(key_s, 0, key_len);
562
563    iv_s = emalloc(iv_size + 1);
564    memset(iv_s, 0, iv_size + 1);
565
566    if (key_len > max_key_size) {
567        php_error_docref(NULL, E_WARNING, "Key size too large; supplied length: %d, max: %d", key_len, max_key_size);
568        key_size = max_key_size;
569    } else {
570        key_size = (int)key_len;
571    }
572    memcpy(key_s, key, key_len);
573
574    if (iv_len != iv_size) {
575        php_error_docref(NULL, E_WARNING, "Iv size incorrect; supplied length: %d, needed: %d", iv_len, iv_size);
576        if (iv_len > iv_size) {
577            iv_len = iv_size;
578        }
579    }
580    memcpy(iv_s, iv, iv_len);
581
582    mcrypt_generic_deinit(pm->td);
583    result = mcrypt_generic_init(pm->td, key_s, key_size, iv_s);
584
585    /* If this function fails, close the mcrypt module to prevent crashes
586     * when further functions want to access this resource */
587    if (result < 0) {
588        zend_list_close(Z_RES_P(mcryptind));
589        switch (result) {
590            case -3:
591                php_error_docref(NULL, E_WARNING, "Key length incorrect");
592                break;
593            case -4:
594                php_error_docref(NULL, E_WARNING, "Memory allocation error");
595                break;
596            case -1:
597            default:
598                php_error_docref(NULL, E_WARNING, "Unknown error");
599                break;
600        }
601    } else {
602        pm->init = 1;
603    }
604    RETVAL_LONG(result);
605
606    efree(iv_s);
607    efree(key_s);
608}
609/* }}} */
610
611/* {{{ proto string mcrypt_generic(resource td, string data)
612   This function encrypts the plaintext */
613PHP_FUNCTION(mcrypt_generic)
614{
615    zval *mcryptind;
616    char *data;
617    size_t data_len;
618    php_mcrypt *pm;
619    zend_string* data_str;
620    int block_size, data_size;
621
622    if (zend_parse_parameters(ZEND_NUM_ARGS(), "rs", &mcryptind, &data, &data_len) == FAILURE) {
623        return;
624    }
625
626    if ((pm = (php_mcrypt *)zend_fetch_resource(Z_RES_P(mcryptind), "MCrypt", le_mcrypt)) == NULL) {
627        RETURN_FALSE;
628    }
629    PHP_MCRYPT_INIT_CHECK
630
631    if (data_len == 0) {
632        php_error_docref(NULL, E_WARNING, "An empty string was passed");
633        RETURN_FALSE
634    }
635
636    /* Check blocksize */
637    if (mcrypt_enc_is_block_mode(pm->td) == 1) { /* It's a block algorithm */
638        block_size = mcrypt_enc_get_block_size(pm->td);
639        data_size = ((((int)data_len - 1) / block_size) + 1) * block_size;
640        data_str = zend_string_alloc(data_size, 0);
641        memset(ZSTR_VAL(data_str), 0, data_size);
642        memcpy(ZSTR_VAL(data_str), data, data_len);
643    } else { /* It's not a block algorithm */
644        data_size = (int)data_len;
645        data_str = zend_string_alloc(data_size, 0);
646        memset(ZSTR_VAL(data_str), 0, data_size);
647        memcpy(ZSTR_VAL(data_str), data, data_len);
648    }
649
650    mcrypt_generic(pm->td, ZSTR_VAL(data_str), data_size);
651    ZSTR_VAL(data_str)[data_size] = '\0';
652
653    RETVAL_NEW_STR(data_str);
654}
655/* }}} */
656
657/* {{{ proto string mdecrypt_generic(resource td, string data)
658   This function decrypts the plaintext */
659PHP_FUNCTION(mdecrypt_generic)
660{
661    zval *mcryptind;
662    char *data;
663    size_t data_len;
664    php_mcrypt *pm;
665    char* data_s;
666    int block_size, data_size;
667
668    if (zend_parse_parameters(ZEND_NUM_ARGS(), "rs", &mcryptind, &data, &data_len) == FAILURE) {
669        return;
670    }
671
672    if ((pm = (php_mcrypt *)zend_fetch_resource(Z_RES_P(mcryptind), "MCrypt", le_mcrypt)) == NULL) {
673        RETURN_FALSE;
674    }
675    PHP_MCRYPT_INIT_CHECK
676
677    if (data_len == 0) {
678        php_error_docref(NULL, E_WARNING, "An empty string was passed");
679        RETURN_FALSE
680    }
681
682    /* Check blocksize */
683    if (mcrypt_enc_is_block_mode(pm->td) == 1) { /* It's a block algorithm */
684        block_size = mcrypt_enc_get_block_size(pm->td);
685        data_size = ((((int)data_len - 1) / block_size) + 1) * block_size;
686        data_s = emalloc(data_size + 1);
687        memset(data_s, 0, data_size);
688        memcpy(data_s, data, data_len);
689    } else { /* It's not a block algorithm */
690        data_size = (int)data_len;
691        data_s = emalloc(data_size + 1);
692        memset(data_s, 0, data_size);
693        memcpy(data_s, data, data_len);
694    }
695
696    mdecrypt_generic(pm->td, data_s, data_size);
697
698    RETVAL_STRINGL(data_s, data_size);
699    efree(data_s);
700}
701/* }}} */
702
703/* {{{ proto array mcrypt_enc_get_supported_key_sizes(resource td)
704   This function decrypts the crypttext */
705PHP_FUNCTION(mcrypt_enc_get_supported_key_sizes)
706{
707    int i, count = 0;
708    int *key_sizes;
709
710    MCRYPT_GET_TD_ARG
711    array_init(return_value);
712
713    key_sizes = mcrypt_enc_get_supported_key_sizes(pm->td, &count);
714
715    for (i = 0; i < count; i++) {
716        add_index_long(return_value, i, key_sizes[i]);
717    }
718
719    mcrypt_free(key_sizes);
720}
721/* }}} */
722
723/* {{{ proto int mcrypt_enc_self_test(resource td)
724   This function runs the self test on the algorithm specified by the descriptor td */
725PHP_FUNCTION(mcrypt_enc_self_test)
726{
727    MCRYPT_GET_TD_ARG
728    RETURN_LONG(mcrypt_enc_self_test(pm->td));
729}
730/* }}} */
731
732/* {{{ proto bool mcrypt_module_close(resource td)
733   Free the descriptor td */
734PHP_FUNCTION(mcrypt_module_close)
735{
736    MCRYPT_GET_TD_ARG
737    zend_list_close(Z_RES_P(mcryptind));
738    RETURN_TRUE;
739}
740/* }}} */
741
742/* {{{ proto bool mcrypt_generic_deinit(resource td)
743   This function terminates encrypt specified by the descriptor td */
744PHP_FUNCTION(mcrypt_generic_deinit)
745{
746    MCRYPT_GET_TD_ARG
747
748    if (mcrypt_generic_deinit(pm->td) < 0) {
749        php_error_docref(NULL, E_WARNING, "Could not terminate encryption specifier");
750        RETURN_FALSE
751    }
752    pm->init = 0;
753    RETURN_TRUE
754}
755/* }}} */
756
757/* {{{ proto bool mcrypt_enc_is_block_algorithm_mode(resource td)
758   Returns TRUE if the mode is for use with block algorithms */
759PHP_FUNCTION(mcrypt_enc_is_block_algorithm_mode)
760{
761    MCRYPT_GET_TD_ARG
762
763    if (mcrypt_enc_is_block_algorithm_mode(pm->td) == 1) {
764        RETURN_TRUE
765    } else {
766        RETURN_FALSE
767    }
768}
769/* }}} */
770
771/* {{{ proto bool mcrypt_enc_is_block_algorithm(resource td)
772   Returns TRUE if the alrogithm is a block algorithms */
773PHP_FUNCTION(mcrypt_enc_is_block_algorithm)
774{
775    MCRYPT_GET_TD_ARG
776
777    if (mcrypt_enc_is_block_algorithm(pm->td) == 1) {
778        RETURN_TRUE
779    } else {
780        RETURN_FALSE
781    }
782}
783/* }}} */
784
785/* {{{ proto bool mcrypt_enc_is_block_mode(resource td)
786   Returns TRUE if the mode outputs blocks */
787PHP_FUNCTION(mcrypt_enc_is_block_mode)
788{
789    MCRYPT_GET_TD_ARG
790
791    if (mcrypt_enc_is_block_mode(pm->td) == 1) {
792        RETURN_TRUE
793    } else {
794        RETURN_FALSE
795    }
796}
797/* }}} */
798
799/* {{{ proto int mcrypt_enc_get_block_size(resource td)
800   Returns the block size of the cipher specified by the descriptor td */
801PHP_FUNCTION(mcrypt_enc_get_block_size)
802{
803    MCRYPT_GET_TD_ARG
804    RETURN_LONG(mcrypt_enc_get_block_size(pm->td));
805}
806/* }}} */
807
808/* {{{ proto int mcrypt_enc_get_key_size(resource td)
809   Returns the maximum supported key size in bytes of the algorithm specified by the descriptor td */
810PHP_FUNCTION(mcrypt_enc_get_key_size)
811{
812    MCRYPT_GET_TD_ARG
813    RETURN_LONG(mcrypt_enc_get_key_size(pm->td));
814}
815/* }}} */
816
817/* {{{ proto int mcrypt_enc_get_iv_size(resource td)
818   Returns the size of the IV in bytes of the algorithm specified by the descriptor td */
819PHP_FUNCTION(mcrypt_enc_get_iv_size)
820{
821    MCRYPT_GET_TD_ARG
822    RETURN_LONG(mcrypt_enc_get_iv_size(pm->td));
823}
824/* }}} */
825
826/* {{{ proto string mcrypt_enc_get_algorithms_name(resource td)
827   Returns the name of the algorithm specified by the descriptor td */
828PHP_FUNCTION(mcrypt_enc_get_algorithms_name)
829{
830    char *name;
831    MCRYPT_GET_TD_ARG
832
833    name = mcrypt_enc_get_algorithms_name(pm->td);
834    RETVAL_STRING(name);
835    mcrypt_free(name);
836}
837/* }}} */
838
839/* {{{ proto string mcrypt_enc_get_modes_name(resource td)
840   Returns the name of the mode specified by the descriptor td */
841PHP_FUNCTION(mcrypt_enc_get_modes_name)
842{
843    char *name;
844    MCRYPT_GET_TD_ARG
845
846    name = mcrypt_enc_get_modes_name(pm->td);
847    RETVAL_STRING(name);
848    mcrypt_free(name);
849}
850/* }}} */
851
852/* {{{ proto bool mcrypt_module_self_test(string algorithm [, string lib_dir])
853   Does a self test of the module "module" */
854PHP_FUNCTION(mcrypt_module_self_test)
855{
856    MCRYPT_GET_MODE_DIR_ARGS(algorithms_dir);
857
858    if (mcrypt_module_self_test(module, dir) == 0) {
859        RETURN_TRUE;
860    } else {
861        RETURN_FALSE;
862    }
863}
864/* }}} */
865
866/* {{{ proto bool mcrypt_module_is_block_algorithm_mode(string mode [, string lib_dir])
867   Returns TRUE if the mode is for use with block algorithms */
868PHP_FUNCTION(mcrypt_module_is_block_algorithm_mode)
869{
870    MCRYPT_GET_MODE_DIR_ARGS(modes_dir)
871
872    if (mcrypt_module_is_block_algorithm_mode(module, dir) == 1) {
873        RETURN_TRUE;
874    } else {
875        RETURN_FALSE;
876    }
877}
878/* }}} */
879
880/* {{{ proto bool mcrypt_module_is_block_algorithm(string algorithm [, string lib_dir])
881   Returns TRUE if the algorithm is a block algorithm */
882PHP_FUNCTION(mcrypt_module_is_block_algorithm)
883{
884    MCRYPT_GET_MODE_DIR_ARGS(algorithms_dir)
885
886    if (mcrypt_module_is_block_algorithm(module, dir) == 1) {
887        RETURN_TRUE;
888    } else {
889        RETURN_FALSE;
890    }
891}
892/* }}} */
893
894/* {{{ proto bool mcrypt_module_is_block_mode(string mode [, string lib_dir])
895   Returns TRUE if the mode outputs blocks of bytes */
896PHP_FUNCTION(mcrypt_module_is_block_mode)
897{
898    MCRYPT_GET_MODE_DIR_ARGS(modes_dir)
899
900    if (mcrypt_module_is_block_mode(module, dir) == 1) {
901        RETURN_TRUE;
902    } else {
903        RETURN_FALSE;
904    }
905}
906/* }}} */
907
908/* {{{ proto int mcrypt_module_get_algo_block_size(string algorithm [, string lib_dir])
909   Returns the block size of the algorithm */
910PHP_FUNCTION(mcrypt_module_get_algo_block_size)
911{
912    MCRYPT_GET_MODE_DIR_ARGS(algorithms_dir)
913
914    RETURN_LONG(mcrypt_module_get_algo_block_size(module, dir));
915}
916/* }}} */
917
918/* {{{ proto int mcrypt_module_get_algo_key_size(string algorithm [, string lib_dir])
919   Returns the maximum supported key size of the algorithm */
920PHP_FUNCTION(mcrypt_module_get_algo_key_size)
921{
922    MCRYPT_GET_MODE_DIR_ARGS(algorithms_dir);
923
924    RETURN_LONG(mcrypt_module_get_algo_key_size(module, dir));
925}
926/* }}} */
927
928/* {{{ proto array mcrypt_module_get_supported_key_sizes(string algorithm [, string lib_dir])
929   This function decrypts the crypttext */
930PHP_FUNCTION(mcrypt_module_get_supported_key_sizes)
931{
932    int i, count = 0;
933    int *key_sizes;
934
935    MCRYPT_GET_MODE_DIR_ARGS(algorithms_dir)
936    array_init(return_value);
937
938    key_sizes = mcrypt_module_get_algo_supported_key_sizes(module, dir, &count);
939
940    for (i = 0; i < count; i++) {
941        add_index_long(return_value, i, key_sizes[i]);
942    }
943    mcrypt_free(key_sizes);
944}
945/* }}} */
946
947/* {{{ proto array mcrypt_list_algorithms([string lib_dir])
948   List all algorithms in "module_dir" */
949PHP_FUNCTION(mcrypt_list_algorithms)
950{
951    char **modules;
952    char *lib_dir = MCG(algorithms_dir);
953    size_t   lib_dir_len;
954    int   i, count;
955
956    if (zend_parse_parameters(ZEND_NUM_ARGS(), "|s",
957        &lib_dir, &lib_dir_len) == FAILURE) {
958        return;
959    }
960
961    array_init(return_value);
962    modules = mcrypt_list_algorithms(lib_dir, &count);
963
964    if (count == 0) {
965        php_error_docref(NULL, E_WARNING, "No algorithms found in module dir");
966    }
967    for (i = 0; i < count; i++) {
968        add_index_string(return_value, i, modules[i]);
969    }
970    mcrypt_free_p(modules, count);
971}
972/* }}} */
973
974/* {{{ proto array mcrypt_list_modes([string lib_dir])
975   List all modes "module_dir" */
976PHP_FUNCTION(mcrypt_list_modes)
977{
978    char **modules;
979    char *lib_dir = MCG(modes_dir);
980    size_t   lib_dir_len;
981    int   i, count;
982
983    if (zend_parse_parameters(ZEND_NUM_ARGS(), "|s",
984        &lib_dir, &lib_dir_len) == FAILURE) {
985        return;
986    }
987
988    array_init(return_value);
989    modules = mcrypt_list_modes(lib_dir, &count);
990
991    if (count == 0) {
992        php_error_docref(NULL, E_WARNING, "No modes found in module dir");
993    }
994    for (i = 0; i < count; i++) {
995        add_index_string(return_value, i, modules[i]);
996    }
997    mcrypt_free_p(modules, count);
998}
999/* }}} */
1000
1001/* {{{ proto int mcrypt_get_key_size(string cipher, string module)
1002   Get the key size of cipher */
1003PHP_FUNCTION(mcrypt_get_key_size)
1004{
1005    char *cipher;
1006    char *module;
1007    size_t   cipher_len, module_len;
1008    char *cipher_dir_string;
1009    char *module_dir_string;
1010    MCRYPT td;
1011
1012    MCRYPT_GET_INI
1013
1014    if (zend_parse_parameters(ZEND_NUM_ARGS(), "ss",
1015        &cipher, &cipher_len, &module, &module_len) == FAILURE) {
1016        return;
1017    }
1018
1019    td = mcrypt_module_open(cipher, cipher_dir_string, module, module_dir_string);
1020    if (td != MCRYPT_FAILED) {
1021        RETVAL_LONG(mcrypt_enc_get_key_size(td));
1022        mcrypt_module_close(td);
1023    } else {
1024        php_error_docref(NULL, E_WARNING, MCRYPT_OPEN_MODULE_FAILED);
1025        RETURN_FALSE;
1026    }
1027}
1028/* }}} */
1029
1030/* {{{ proto int mcrypt_get_block_size(string cipher, string module)
1031   Get the key size of cipher */
1032PHP_FUNCTION(mcrypt_get_block_size)
1033{
1034    char *cipher;
1035    char *module;
1036    size_t   cipher_len, module_len;
1037    char *cipher_dir_string;
1038    char *module_dir_string;
1039    MCRYPT td;
1040
1041    MCRYPT_GET_INI
1042
1043    if (zend_parse_parameters(ZEND_NUM_ARGS(), "ss",
1044        &cipher, &cipher_len, &module, &module_len) == FAILURE) {
1045        return;
1046    }
1047
1048    td = mcrypt_module_open(cipher, cipher_dir_string, module, module_dir_string);
1049    if (td != MCRYPT_FAILED) {
1050        RETVAL_LONG(mcrypt_enc_get_block_size(td));
1051        mcrypt_module_close(td);
1052    } else {
1053        php_error_docref(NULL, E_WARNING, MCRYPT_OPEN_MODULE_FAILED);
1054        RETURN_FALSE;
1055    }
1056}
1057/* }}} */
1058
1059/* {{{ proto int mcrypt_get_iv_size(string cipher, string module)
1060   Get the IV size of cipher (Usually the same as the blocksize) */
1061PHP_FUNCTION(mcrypt_get_iv_size)
1062{
1063    char *cipher;
1064    char *module;
1065    size_t   cipher_len, module_len;
1066    char *cipher_dir_string;
1067    char *module_dir_string;
1068    MCRYPT td;
1069
1070    MCRYPT_GET_INI
1071
1072    if (zend_parse_parameters(ZEND_NUM_ARGS(), "ss",
1073        &cipher, &cipher_len, &module, &module_len) == FAILURE) {
1074        return;
1075    }
1076
1077    td = mcrypt_module_open(cipher, cipher_dir_string, module, module_dir_string);
1078    if (td != MCRYPT_FAILED) {
1079        RETVAL_LONG(mcrypt_enc_get_iv_size(td));
1080        mcrypt_module_close(td);
1081    } else {
1082        php_error_docref(NULL, E_WARNING, MCRYPT_OPEN_MODULE_FAILED);
1083        RETURN_FALSE;
1084    }
1085}
1086/* }}} */
1087
1088/* {{{ proto string mcrypt_get_cipher_name(string cipher)
1089   Get the key size of cipher */
1090PHP_FUNCTION(mcrypt_get_cipher_name)
1091{
1092    char *cipher_dir_string;
1093    char *module_dir_string;
1094    char *cipher_name;
1095    char *cipher;
1096    size_t   cipher_len;
1097    MCRYPT td;
1098
1099    MCRYPT_GET_INI
1100
1101    if (zend_parse_parameters(ZEND_NUM_ARGS(), "s",
1102        &cipher, &cipher_len) == FAILURE) {
1103        return;
1104    }
1105
1106    /* The code below is actually not very nice, but I didn't see a better
1107     * method */
1108    td = mcrypt_module_open(cipher, cipher_dir_string, "ecb", module_dir_string);
1109    if (td != MCRYPT_FAILED) {
1110        cipher_name = mcrypt_enc_get_algorithms_name(td);
1111        mcrypt_module_close(td);
1112        RETVAL_STRING(cipher_name);
1113        mcrypt_free(cipher_name);
1114    } else {
1115        td = mcrypt_module_open(cipher, cipher_dir_string, "stream", module_dir_string);
1116        if (td != MCRYPT_FAILED) {
1117            cipher_name = mcrypt_enc_get_algorithms_name(td);
1118            mcrypt_module_close(td);
1119            RETVAL_STRING(cipher_name);
1120            mcrypt_free(cipher_name);
1121        } else {
1122            php_error_docref(NULL, E_WARNING, MCRYPT_OPEN_MODULE_FAILED);
1123            RETURN_FALSE;
1124        }
1125    }
1126}
1127/* }}} */
1128
1129static char *php_mcrypt_get_key_size_str(
1130        int max_key_size, const int *key_sizes, int key_size_count) /* {{{ */
1131{
1132    if (key_size_count == 0) {
1133        char *str;
1134        spprintf(&str, 0, "Only keys of size 1 to %d supported", max_key_size);
1135        return str;
1136    } else if (key_size_count == 1) {
1137        char *str;
1138        spprintf(&str, 0, "Only keys of size %d supported", key_sizes[0]);
1139        return str;
1140    } else {
1141        int i;
1142        char *result = NULL;
1143        smart_str str = {0};
1144        smart_str_appends(&str, "Only keys of sizes ");
1145
1146        for (i = 0; i < key_size_count; ++i) {
1147            if (i == key_size_count - 1) {
1148                smart_str_appends(&str, " or ");
1149            } else if (i != 0) {
1150                smart_str_appends(&str, ", ");
1151            }
1152
1153            smart_str_append_long(&str, key_sizes[i]);
1154        }
1155
1156        smart_str_appends(&str, " supported");
1157        smart_str_0(&str);
1158        result = estrndup(ZSTR_VAL(str.s), ZSTR_LEN(str.s));
1159        smart_str_free(&str);
1160
1161        return result;
1162    }
1163}
1164/* }}} */
1165
1166static zend_bool php_mcrypt_is_valid_key_size(
1167        int key_size, int max_key_size, int *key_sizes, int key_size_count) /* {{{ */
1168{
1169    int i;
1170
1171    if (key_size <= 0 || key_size > max_key_size) {
1172        return 0;
1173    }
1174
1175    if (key_size_count == 0) {
1176        /* All key sizes are valid */
1177        return 1;
1178    }
1179
1180    for (i = 0; i < key_size_count; i++) {
1181        if (key_sizes[i] == key_size) {
1182            return 1;
1183        }
1184    }
1185
1186    return 0;
1187}
1188/* }}} */
1189
1190static int php_mcrypt_ensure_valid_key_size(MCRYPT td, int key_size) /* {{{ */
1191{
1192    int key_size_count;
1193    int max_key_size = mcrypt_enc_get_key_size(td);
1194    int *key_sizes = mcrypt_enc_get_supported_key_sizes(td, &key_size_count);
1195
1196    zend_bool is_valid_key_size = php_mcrypt_is_valid_key_size(
1197        key_size, max_key_size, key_sizes, key_size_count
1198    );
1199    if (!is_valid_key_size) {
1200        char *key_size_str = php_mcrypt_get_key_size_str(
1201            max_key_size, key_sizes, key_size_count
1202        );
1203        php_error_docref(NULL, E_WARNING,
1204            "Key of size %d not supported by this algorithm. %s", key_size, key_size_str
1205        );
1206        efree(key_size_str);
1207    }
1208
1209    if (key_sizes) {
1210        mcrypt_free(key_sizes);
1211    }
1212
1213    return is_valid_key_size ? SUCCESS : FAILURE;
1214}
1215/* }}} */
1216
1217static int php_mcrypt_ensure_valid_iv(MCRYPT td, const char *iv, int iv_size) /* {{{ */
1218{
1219    if (mcrypt_enc_mode_has_iv(td) == 1) {
1220        int expected_iv_size = mcrypt_enc_get_iv_size(td);
1221
1222        if (!iv) {
1223            php_error_docref(NULL, E_WARNING,
1224                "Encryption mode requires an initialization vector of size %d", expected_iv_size
1225            );
1226            return FAILURE;
1227        }
1228
1229        if (iv_size != expected_iv_size) {
1230            php_error_docref(NULL, E_WARNING,
1231                "Received initialization vector of size %d, but size %d is required "
1232                "for this encryption mode", iv_size, expected_iv_size
1233            );
1234            return FAILURE;
1235        }
1236    }
1237
1238    return SUCCESS;
1239}
1240/* }}} */
1241
1242static void php_mcrypt_do_crypt(char* cipher, const char *key, size_t key_len, const char *data, size_t data_len, char *mode, const char *iv, size_t iv_len, size_t dencrypt, zval* return_value) /* {{{ */
1243{
1244    char *cipher_dir_string;
1245    char *module_dir_string;
1246    zend_long data_size;
1247    char *data_s;
1248    MCRYPT td;
1249
1250    MCRYPT_GET_INI
1251
1252    td = mcrypt_module_open(cipher, cipher_dir_string, mode, module_dir_string);
1253    if (td == MCRYPT_FAILED) {
1254        php_error_docref(NULL, E_WARNING, MCRYPT_OPEN_MODULE_FAILED);
1255        RETURN_FALSE;
1256    }
1257
1258    if (php_mcrypt_ensure_valid_key_size(td, (int)key_len) == FAILURE) {
1259        mcrypt_module_close(td);
1260        RETURN_FALSE;
1261    }
1262
1263    if (php_mcrypt_ensure_valid_iv(td, iv, (int)iv_len) == FAILURE) {
1264        mcrypt_module_close(td);
1265        RETURN_FALSE;
1266    }
1267
1268    /* Check blocksize */
1269    if (mcrypt_enc_is_block_mode(td) == 1) { /* It's a block algorithm */
1270        int block_size = mcrypt_enc_get_block_size(td);
1271        data_size = ((((zend_long)data_len - 1) / block_size) + 1) * block_size;
1272        data_s = emalloc(data_size + 1);
1273        memset(data_s, 0, data_size);
1274        memcpy(data_s, data, data_len);
1275    } else { /* It's not a block algorithm */
1276        data_size = data_len;
1277        data_s = emalloc(data_size + 1);
1278        memcpy(data_s, data, data_len);
1279    }
1280
1281    if (mcrypt_generic_init(td, (void *) key, (int)key_len, (void *) iv) < 0) {
1282        php_error_docref(NULL, E_RECOVERABLE_ERROR, "Mcrypt initialisation failed");
1283        mcrypt_module_close(td);
1284        RETURN_FALSE;
1285    }
1286
1287    if (dencrypt == MCRYPT_ENCRYPT) {
1288        mcrypt_generic(td, data_s, (int)data_size);
1289    } else {
1290        mdecrypt_generic(td, data_s, (int)data_size);
1291    }
1292
1293    data_s[data_size] = 0;
1294
1295    RETVAL_STRINGL(data_s, data_size);
1296    efree(data_s);
1297
1298    /* freeing vars */
1299    mcrypt_generic_end(td);
1300}
1301/* }}} */
1302
1303/* {{{ proto string mcrypt_encrypt(string cipher, string key, string data, string mode, string iv)
1304   OFB crypt/decrypt data using key key with cipher cipher starting with iv */
1305PHP_FUNCTION(mcrypt_encrypt)
1306{
1307    char *cipher, *key, *data, *mode, *iv = NULL;
1308    size_t cipher_len, key_len, data_len, mode_len, iv_len = 0;
1309
1310    if (zend_parse_parameters(ZEND_NUM_ARGS(), "ssss|s", &cipher, &cipher_len,
1311        &key, &key_len, &data, &data_len, &mode, &mode_len, &iv, &iv_len) == FAILURE) {
1312        return;
1313    }
1314
1315    php_mcrypt_do_crypt(cipher, key, key_len, data, data_len, mode, iv, iv_len, MCRYPT_ENCRYPT, return_value);
1316}
1317/* }}} */
1318
1319/* {{{ proto string mcrypt_decrypt(string cipher, string key, string data, string mode, string iv)
1320   OFB crypt/decrypt data using key key with cipher cipher starting with iv */
1321PHP_FUNCTION(mcrypt_decrypt)
1322{
1323    char *cipher, *key, *data, *mode, *iv = NULL;
1324    size_t cipher_len, key_len, data_len, mode_len, iv_len = 0;
1325
1326    if (zend_parse_parameters(ZEND_NUM_ARGS(), "ssss|s", &cipher, &cipher_len,
1327        &key, &key_len, &data, &data_len, &mode, &mode_len, &iv, &iv_len) == FAILURE) {
1328        return;
1329    }
1330
1331    php_mcrypt_do_crypt(cipher, key, key_len, data, data_len, mode, iv, iv_len, MCRYPT_DECRYPT, return_value);
1332}
1333/* }}} */
1334
1335/* {{{ proto string mcrypt_create_iv(int size, int source)
1336   Create an initialization vector (IV) */
1337PHP_FUNCTION(mcrypt_create_iv)
1338{
1339    char *iv;
1340    zend_long source = URANDOM;
1341    zend_long size;
1342    int n = 0;
1343
1344    if (zend_parse_parameters(ZEND_NUM_ARGS(), "l|l", &size, &source) == FAILURE) {
1345        return;
1346    }
1347
1348    if (size <= 0 || size >= INT_MAX) {
1349        php_error_docref(NULL, E_WARNING, "Cannot create an IV with a size of less than 1 or greater than %d", INT_MAX);
1350        RETURN_FALSE;
1351    }
1352
1353    iv = ecalloc(size + 1, 1);
1354
1355    if (source == RANDOM || source == URANDOM) {
1356#if PHP_WIN32
1357        /* random/urandom equivalent on Windows */
1358        BYTE *iv_b = (BYTE *) iv;
1359        if (php_win32_get_random_bytes(iv_b, (size_t) size) == FAILURE){
1360            efree(iv);
1361            php_error_docref(NULL, E_WARNING, "Could not gather sufficient random data");
1362            RETURN_FALSE;
1363        }
1364        n = (int)size;
1365#else
1366        int    *fd = &MCG(fd[source]);
1367        size_t read_bytes = 0;
1368
1369        if (*fd < 0) {
1370            *fd = open(source == RANDOM ? "/dev/random" : "/dev/urandom", O_RDONLY);
1371            if (*fd < 0) {
1372                efree(iv);
1373                php_error_docref(NULL, E_WARNING, "Cannot open source device");
1374                RETURN_FALSE;
1375            }
1376        }
1377
1378        while (read_bytes < size) {
1379            n = read(*fd, iv + read_bytes, size - read_bytes);
1380            if (n <= 0) {
1381                break;
1382            }
1383            read_bytes += n;
1384        }
1385        n = read_bytes;
1386
1387        if (n < size) {
1388            efree(iv);
1389            php_error_docref(NULL, E_WARNING, "Could not gather sufficient random data");
1390            RETURN_FALSE;
1391        }
1392#endif
1393    } else {
1394        n = (int)size;
1395        while (size) {
1396            iv[--size] = (char) (255.0 * php_rand() / RAND_MAX);
1397        }
1398    }
1399    RETVAL_STRINGL(iv, n);
1400    efree(iv);
1401}
1402/* }}} */
1403
1404#endif
1405
1406/*
1407 * Local variables:
1408 * tab-width: 4
1409 * c-basic-offset: 4
1410 * End:
1411 * vim600: sw=4 ts=4 fdm=marker
1412 * vim<600: sw=4 ts=4
1413 */
1414