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Annotation of embedaddon/php/win32/winutil.c, revision 1.1.1.1

1.1       misho       1: /*
                      2:    +----------------------------------------------------------------------+
                      3:    | PHP Version 5                                                        |
                      4:    +----------------------------------------------------------------------+
                      5:    | Copyright (c) 1997-2012 The PHP Group                                |
                      6:    +----------------------------------------------------------------------+
                      7:    | This source file is subject to version 3.01 of the PHP license,      |
                      8:    | that is bundled with this package in the file LICENSE, and is        |
                      9:    | available through the world-wide-web at the following url:           |
                     10:    | http://www.php.net/license/3_01.txt                                  |
                     11:    | If you did not receive a copy of the PHP license and are unable to   |
                     12:    | obtain it through the world-wide-web, please send a note to          |
                     13:    | license@php.net so we can mail you a copy immediately.               |
                     14:    +----------------------------------------------------------------------+
                     15:    | Author: Zeev Suraski <zeev@zend.com>                                 |
                     16:    *         Pierre Joye <pierre@php.net>                                 |
                     17:    +----------------------------------------------------------------------+
                     18:  */
                     19: 
                     20: /* $Id: winutil.c 321634 2012-01-01 13:15:04Z felipe $ */
                     21: 
                     22: #include "php.h"
                     23: #include <wincrypt.h>
                     24: 
                     25: PHPAPI char *php_win_err(int error)
                     26: {
                     27:        char *buf = NULL;
                     28: 
                     29:        FormatMessage(
                     30:                FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |   FORMAT_MESSAGE_IGNORE_INSERTS,
                     31:                NULL, error, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&buf, 0, NULL
                     32:        );
                     33: 
                     34:        return (buf ? (char *) buf : "");
                     35: }
                     36: 
                     37: int php_win32_check_trailing_space(const char * path, const int path_len) {
                     38:        if (path_len < 1) {
                     39:                return 1;
                     40:        }
                     41:        if (path) {
                     42:                if (path[0] == ' ' || path[path_len - 1] == ' ') {
                     43:                        return 0;
                     44:                } else {
                     45:                        return 1;
                     46:                }
                     47:        } else {
                     48:                return 0;
                     49:        }
                     50: }
                     51: 
                     52: HCRYPTPROV   hCryptProv;
                     53: unsigned int has_crypto_ctx = 0;
                     54: 
                     55: #ifdef ZTS
                     56: MUTEX_T php_lock_win32_cryptoctx;
                     57: void php_win32_init_rng_lock()
                     58: {
                     59:        php_lock_win32_cryptoctx = tsrm_mutex_alloc();
                     60: }
                     61: 
                     62: void php_win32_free_rng_lock()
                     63: {
                     64:        tsrm_mutex_lock(php_lock_win32_cryptoctx);
                     65:        CryptReleaseContext(hCryptProv, 0);
                     66:        has_crypto_ctx = 0;
                     67:        tsrm_mutex_unlock(php_lock_win32_cryptoctx);
                     68:        tsrm_mutex_free(php_lock_win32_cryptoctx);
                     69: 
                     70: }
                     71: #else
                     72: #define php_win32_init_rng_lock();
                     73: #define php_win32_free_rng_lock();
                     74: #endif
                     75: 
                     76: 
                     77: 
                     78: PHPAPI int php_win32_get_random_bytes(unsigned char *buf, size_t size) {  /* {{{ */
                     79: 
                     80:        unsigned int has_contextg = 0;
                     81: 
                     82:        BOOL ret;
                     83:        size_t i = 0;
                     84: 
                     85: #ifdef ZTS
                     86:        tsrm_mutex_lock(php_lock_win32_cryptoctx);
                     87: #endif
                     88: 
                     89:        if (has_crypto_ctx == 0) {
                     90:                /* CRYPT_VERIFYCONTEXT > only hashing&co-like use, no need to acces prv keys */
                     91:                if (!CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL, CRYPT_MACHINE_KEYSET|CRYPT_VERIFYCONTEXT )) {
                     92:                        /* Could mean that the key container does not exist, let try 
                     93:                           again by asking for a new one. If it fails here, it surely means that the user running 
                     94:                this process does not have the permission(s) to use this container.
                     95:              */
                     96:                        if (GetLastError() == NTE_BAD_KEYSET) {
                     97:                                if (CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL, CRYPT_NEWKEYSET | CRYPT_MACHINE_KEYSET | CRYPT_VERIFYCONTEXT )) {
                     98:                                        has_crypto_ctx = 1;
                     99:                                } else {
                    100:                                        has_crypto_ctx = 0;
                    101:                                }
                    102:                        }
                    103:                } else {
                    104:                        has_crypto_ctx = 1;
                    105:                }
                    106:        }
                    107: 
                    108: #ifdef ZTS
                    109:        tsrm_mutex_unlock(php_lock_win32_cryptoctx);
                    110: #endif
                    111: 
                    112:        if (has_crypto_ctx == 0) {
                    113:                return FAILURE;
                    114:        }
                    115: 
                    116:        ret = CryptGenRandom(hCryptProv, size, buf);
                    117: 
                    118:        if (ret) {
                    119:                return SUCCESS;
                    120:        } else {
                    121:                return FAILURE;
                    122:        }
                    123: }
                    124: /* }}} */
                    125: