ext/standard/crypt.c

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This source file includes following definitions.
PHP_MINIT_FUNCTION
PHP_MSHUTDOWN_FUNCTION
php_to64
php_crypt
PHP_FUNCTION
   1 /*
   2    +----------------------------------------------------------------------+
   3    | PHP Version 5                                                        |
   4    +----------------------------------------------------------------------+
   5    | Copyright (c) 1997-2016 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: Stig Bakken <ssb@php.net>                                   |
  16    |          Zeev Suraski <zeev@zend.com>                                |
  17    |          Rasmus Lerdorf <rasmus@php.net>                             |
  18    |          Pierre Joye <pierre@php.net>                                |
  19    +----------------------------------------------------------------------+
  20 */
  21 
  22 /* $Id$ */
  23 
  24 #include <stdlib.h>
  25 
  26 #include "php.h"
  27 #if HAVE_CRYPT
  28 
  29 #if HAVE_UNISTD_H
  30 #include <unistd.h>
  31 #endif
  32 #if PHP_USE_PHP_CRYPT_R
  33 # include "php_crypt_r.h"
  34 # include "crypt_freesec.h"
  35 #else
  36 # if HAVE_CRYPT_H
  37 #  if defined(CRYPT_R_GNU_SOURCE) && !defined(_GNU_SOURCE)
  38 #   define _GNU_SOURCE
  39 #  endif
  40 #  include <crypt.h>
  41 # endif
  42 #endif
  43 #if TM_IN_SYS_TIME
  44 #include <sys/time.h>
  45 #else
  46 #include <time.h>
  47 #endif
  48 #if HAVE_STRING_H
  49 #include <string.h>
  50 #else
  51 #include <strings.h>
  52 #endif
  53 
  54 #ifdef PHP_WIN32
  55 #include <process.h>
  56 #endif
  57 
  58 #include "php_lcg.h"
  59 #include "php_crypt.h"
  60 #include "php_rand.h"
  61 
  62 /* The capabilities of the crypt() function is determined by the test programs
  63  * run by configure from aclocal.m4.  They will set PHP_STD_DES_CRYPT,
  64  * PHP_EXT_DES_CRYPT, PHP_MD5_CRYPT and PHP_BLOWFISH_CRYPT as appropriate
  65  * for the target platform. */
  66 
  67 #if PHP_STD_DES_CRYPT
  68 #define PHP_MAX_SALT_LEN 2
  69 #endif
  70 
  71 #if PHP_EXT_DES_CRYPT
  72 #undef PHP_MAX_SALT_LEN
  73 #define PHP_MAX_SALT_LEN 9
  74 #endif
  75 
  76 #if PHP_MD5_CRYPT
  77 #undef PHP_MAX_SALT_LEN
  78 #define PHP_MAX_SALT_LEN 12
  79 #endif
  80 
  81 #if PHP_BLOWFISH_CRYPT
  82 #undef PHP_MAX_SALT_LEN
  83 #define PHP_MAX_SALT_LEN 60
  84 #endif
  85 
  86 #if PHP_SHA512_CRYPT
  87 #undef PHP_MAX_SALT_LEN
  88 #define PHP_MAX_SALT_LEN 123
  89 #endif
  90 
  91 
  92 /* If the configure-time checks fail, we provide DES.
  93  * XXX: This is a hack. Fix the real problem! */
  94 
  95 #ifndef PHP_MAX_SALT_LEN
  96 #define PHP_MAX_SALT_LEN 2
  97 #undef PHP_STD_DES_CRYPT
  98 #define PHP_STD_DES_CRYPT 1
  99 #endif
 100 
 101 #define PHP_CRYPT_RAND php_rand(TSRMLS_C)
 102 
 103 PHP_MINIT_FUNCTION(crypt) /* {{{ */
 104 {
 105         REGISTER_LONG_CONSTANT("CRYPT_SALT_LENGTH", PHP_MAX_SALT_LEN, CONST_CS | CONST_PERSISTENT);
 106         REGISTER_LONG_CONSTANT("CRYPT_STD_DES", PHP_STD_DES_CRYPT, CONST_CS | CONST_PERSISTENT);
 107         REGISTER_LONG_CONSTANT("CRYPT_EXT_DES", PHP_EXT_DES_CRYPT, CONST_CS | CONST_PERSISTENT);
 108         REGISTER_LONG_CONSTANT("CRYPT_MD5", PHP_MD5_CRYPT, CONST_CS | CONST_PERSISTENT);
 109         REGISTER_LONG_CONSTANT("CRYPT_BLOWFISH", PHP_BLOWFISH_CRYPT, CONST_CS | CONST_PERSISTENT);
 110 
 111 #ifdef PHP_SHA256_CRYPT
 112    REGISTER_LONG_CONSTANT("CRYPT_SHA256", PHP_SHA256_CRYPT, CONST_CS | CONST_PERSISTENT);
 113 #endif
 114 
 115 #ifdef PHP_SHA512_CRYPT
 116    REGISTER_LONG_CONSTANT("CRYPT_SHA512", PHP_SHA512_CRYPT, CONST_CS | CONST_PERSISTENT);
 117 #endif
 118 
 119 #if PHP_USE_PHP_CRYPT_R
 120         php_init_crypt_r();
 121 #endif
 122 
 123         return SUCCESS;
 124 }
 125 /* }}} */
 126 
 127 PHP_MSHUTDOWN_FUNCTION(crypt) /* {{{ */
 128 {
 129 #if PHP_USE_PHP_CRYPT_R
 130         php_shutdown_crypt_r();
 131 #endif
 132 
 133         return SUCCESS;
 134 }
 135 /* }}} */
 136 
 137 static unsigned char itoa64[] = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
 138 
 139 static void php_to64(char *s, long v, int n) /* {{{ */
 140 {
 141         while (--n >= 0) {
 142                 *s++ = itoa64[v&0x3f];
 143                 v >>= 6;
 144         }
 145 }
 146 /* }}} */
 147 
 148 PHPAPI int php_crypt(const char *password, const int pass_len, const char *salt, int salt_len, char **result)
 149 {
 150         char *crypt_res;
 151 /* Windows (win32/crypt) has a stripped down version of libxcrypt and 
 152         a CryptoApi md5_crypt implementation */
 153 #if PHP_USE_PHP_CRYPT_R
 154         {
 155                 struct php_crypt_extended_data buffer;
 156 
 157                 if (salt[0]=='$' && salt[1]=='1' && salt[2]=='$') {
 158                         char output[MD5_HASH_MAX_LEN], *out;
 159 
 160                         out = php_md5_crypt_r(password, salt, output);
 161                         if (out) {
 162                                 *result = estrdup(out);
 163                                 return SUCCESS;
 164                         }
 165                         return FAILURE;
 166                 } else if (salt[0]=='$' && salt[1]=='6' && salt[2]=='$') {
 167                         char *output;
 168                         output = emalloc(PHP_MAX_SALT_LEN);
 169 
 170                         crypt_res = php_sha512_crypt_r(password, salt, output, PHP_MAX_SALT_LEN);
 171                         if (!crypt_res) {
 172                                 memset(output, 0, PHP_MAX_SALT_LEN);
 173                                 efree(output);
 174                                 return FAILURE;
 175                         } else {
 176                                 *result = estrdup(output);
 177                                 memset(output, 0, PHP_MAX_SALT_LEN);
 178                                 efree(output);
 179                                 return SUCCESS;
 180                         }
 181                 } else if (salt[0]=='$' && salt[1]=='5' && salt[2]=='$') {
 182                         char *output;
 183                         output = emalloc(PHP_MAX_SALT_LEN);
 184 
 185                         crypt_res = php_sha256_crypt_r(password, salt, output, PHP_MAX_SALT_LEN);
 186                         if (!crypt_res) {
 187                                 memset(output, 0, PHP_MAX_SALT_LEN);
 188                                 efree(output);
 189                                 return FAILURE;
 190                         } else {
 191                                 *result = estrdup(output);
 192                                 memset(output, 0, PHP_MAX_SALT_LEN);
 193                                 efree(output);
 194                                 return SUCCESS;
 195                         }
 196                 } else if (
 197                                 salt[0] == '$' &&
 198                                 salt[1] == '2' &&
 199                                 salt[3] == '$' &&
 200                                 salt[4] >= '0' && salt[4] <= '3' &&
 201                                 salt[5] >= '0' && salt[5] <= '9' &&
 202                                 salt[6] == '$') {
 203                         char output[PHP_MAX_SALT_LEN + 1];
 204 
 205                         memset(output, 0, PHP_MAX_SALT_LEN + 1);
 206 
 207                         crypt_res = php_crypt_blowfish_rn(password, salt, output, sizeof(output));
 208                         if (!crypt_res) {
 209                                 memset(output, 0, PHP_MAX_SALT_LEN + 1);
 210                                 return FAILURE;
 211                         } else {
 212                                 *result = estrdup(output);
 213                                 memset(output, 0, PHP_MAX_SALT_LEN + 1);
 214                                 return SUCCESS;
 215                         }
 216                 } else {
 217                         memset(&buffer, 0, sizeof(buffer));
 218                         _crypt_extended_init_r();
 219 
 220                         crypt_res = _crypt_extended_r(password, salt, &buffer);
 221                         if (!crypt_res || (salt[0] == '*' && salt[1] == '0')) {
 222                                 return FAILURE;
 223                         } else {
 224                                 *result = estrdup(crypt_res);
 225                                 return SUCCESS;
 226                         }
 227                 }
 228         }
 229 #else
 230 
 231 # if defined(HAVE_CRYPT_R) && (defined(_REENTRANT) || defined(_THREAD_SAFE))
 232         {
 233 #  if defined(CRYPT_R_STRUCT_CRYPT_DATA)
 234                 struct crypt_data buffer;
 235                 memset(&buffer, 0, sizeof(buffer));
 236 #  elif defined(CRYPT_R_CRYPTD)
 237                 CRYPTD buffer;
 238 #  else
 239 #    error Data struct used by crypt_r() is unknown. Please report.
 240 #  endif
 241                 crypt_res = crypt_r(password, salt, &buffer);
 242                 if (!crypt_res || (salt[0] == '*' && salt[1] == '0')) {
 243                         return FAILURE;
 244                 } else {
 245                         *result = estrdup(crypt_res);
 246                         return SUCCESS;
 247                 }
 248         }
 249 # endif
 250 #endif
 251 }
 252 /* }}} */
 253 
 254 
 255 /* {{{ proto string crypt(string str [, string salt])
 256    Hash a string */
 257 PHP_FUNCTION(crypt)
 258 {
 259         char salt[PHP_MAX_SALT_LEN + 1];
 260         char *str, *salt_in = NULL, *result = NULL;
 261         int str_len, salt_in_len = 0;
 262         salt[0] = salt[PHP_MAX_SALT_LEN] = '\0';
 263 
 264         /* This will produce suitable results if people depend on DES-encryption
 265          * available (passing always 2-character salt). At least for glibc6.1 */
 266         memset(&salt[1], '$', PHP_MAX_SALT_LEN - 1);
 267 
 268         if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|s", &str, &str_len, &salt_in, &salt_in_len) == FAILURE) {
 269                 return;
 270         }
 271 
 272         if (salt_in) {
 273                 memcpy(salt, salt_in, MIN(PHP_MAX_SALT_LEN, salt_in_len));
 274         } else {
 275                 php_error_docref(NULL TSRMLS_CC, E_NOTICE, "No salt parameter was specified. You must use a randomly generated salt and a strong hash function to produce a secure hash.");
 276         }
 277 
 278         /* The automatic salt generation covers standard DES, md5-crypt and Blowfish (simple) */
 279         if (!*salt) {
 280 #if PHP_MD5_CRYPT
 281                 strncpy(salt, "$1$", PHP_MAX_SALT_LEN);
 282                 php_to64(&salt[3], PHP_CRYPT_RAND, 4);
 283                 php_to64(&salt[7], PHP_CRYPT_RAND, 4);
 284                 strncpy(&salt[11], "$", PHP_MAX_SALT_LEN - 11);
 285 #elif PHP_STD_DES_CRYPT
 286                 php_to64(&salt[0], PHP_CRYPT_RAND, 2);
 287                 salt[2] = '\0';
 288 #endif
 289                 salt_in_len = strlen(salt);
 290         } else {
 291                 salt_in_len = MIN(PHP_MAX_SALT_LEN, salt_in_len);
 292         }
 293         salt[salt_in_len] = '\0';
 294 
 295         if (php_crypt(str, str_len, salt, salt_in_len, &result) == FAILURE) {
 296                 if (salt[0] == '*' && salt[1] == '0') {
 297                         RETURN_STRING("*1", 1);
 298                 } else {
 299                         RETURN_STRING("*0", 1);
 300                 }
 301         }
 302         RETURN_STRING(result, 0);
 303 }
 304 /* }}} */
 305 #endif
 306 
 307 /*
 308  * Local variables:
 309  * tab-width: 4
 310  * c-basic-offset: 4
 311  * End:
 312  * vim600: sw=4 ts=4 fdm=marker
 313  * vim<600: sw=4 ts=4
 314  */
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root/ext/standard/crypt.c

DEFINITIONS
