xref: /PHP-5.6/win32/winutil.c (revision 49493a2d)
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    | Author: Zeev Suraski <zeev@zend.com>                                 |
16    *         Pierre Joye <pierre@php.net>                                 |
17    +----------------------------------------------------------------------+
18  */
19 
20 /* $Id$ */
21 
22 #include "php.h"
23 #include <wincrypt.h>
24 
php_win32_error_to_msg(int error)25 PHPAPI char *php_win32_error_to_msg(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 
php_win32_check_trailing_space(const char * path,const int path_len)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;
php_win32_init_rng_lock()57 void php_win32_init_rng_lock()
58 {
59 	php_lock_win32_cryptoctx = tsrm_mutex_alloc();
60 }
61 
php_win32_free_rng_lock()62 void php_win32_free_rng_lock()
63 {
64 	tsrm_mutex_lock(php_lock_win32_cryptoctx);
65 	if (has_crypto_ctx == 1) {
66 		CryptReleaseContext(hCryptProv, 0);
67 		has_crypto_ctx = 0;
68 	}
69 	tsrm_mutex_unlock(php_lock_win32_cryptoctx);
70 	tsrm_mutex_free(php_lock_win32_cryptoctx);
71 
72 }
73 #else
74 #define php_win32_init_rng_lock();
75 #define php_win32_free_rng_lock();
76 #endif
77 
78 
79 
php_win32_get_random_bytes(unsigned char * buf,size_t size)80 PHPAPI int php_win32_get_random_bytes(unsigned char *buf, size_t size) {  /* {{{ */
81 
82 	unsigned int has_contextg = 0;
83 
84 	BOOL ret;
85 	size_t i = 0;
86 
87 #ifdef ZTS
88 	tsrm_mutex_lock(php_lock_win32_cryptoctx);
89 #endif
90 
91 	if (has_crypto_ctx == 0) {
92 		/* CRYPT_VERIFYCONTEXT > only hashing&co-like use, no need to acces prv keys */
93 		if (!CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL, CRYPT_MACHINE_KEYSET|CRYPT_VERIFYCONTEXT )) {
94 			/* Could mean that the key container does not exist, let try
95 			   again by asking for a new one. If it fails here, it surely means that the user running
96                this process does not have the permission(s) to use this container.
97              */
98 			if (GetLastError() == NTE_BAD_KEYSET) {
99 				if (CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL, CRYPT_NEWKEYSET | CRYPT_MACHINE_KEYSET | CRYPT_VERIFYCONTEXT )) {
100 					has_crypto_ctx = 1;
101 				} else {
102 					has_crypto_ctx = 0;
103 				}
104 			}
105 		} else {
106 			has_crypto_ctx = 1;
107 		}
108 	}
109 
110 #ifdef ZTS
111 	tsrm_mutex_unlock(php_lock_win32_cryptoctx);
112 #endif
113 
114 	if (has_crypto_ctx == 0) {
115 		return FAILURE;
116 	}
117 
118 	ret = CryptGenRandom(hCryptProv, size, buf);
119 
120 	if (ret) {
121 		return SUCCESS;
122 	} else {
123 		return FAILURE;
124 	}
125 }
126 /* }}} */
127 
128