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- add striped down version of RNG layer to have a reliable random src on windows

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This commit is contained in:
Pierre Joye 2010-06-08 13:00:11 +00:00
parent ae01c146d1
commit 5afc8e2c83
1 changed files with 35 additions and 1 deletions
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36
win32/winutil.c
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@ -12,13 +12,15 @@
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: |
| Author: Zeev Suraski <zeev@zend.com> |
* Pierre Joye <pierre@php.net> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "php.h"
#include <wincrypt.h>
PHPAPI char *php_win_err(int error)
{
@ -46,3 +48,35 @@ int php_win32_check_trailing_space(const char * path, const int path_len) {
return 0;
}
}
PHPAPI int php_win32_get_random_bytes(unsigned char *buf, size_t size) { /* {{{ */
HCRYPTPROV hCryptProv;
int has_context = 0;
BOOL ret;
size_t i = 0;
if (!CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL, 0)) {
/* Could mean that the key container does not exist, let try
again by asking for a new one */
if (GetLastError() == NTE_BAD_KEYSET) {
if (CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL, CRYPT_NEWKEYSET)) {
has_context = 1;
} else {
return FAILURE;
}
}
}
ret = CryptGenRandom(hCryptProv, size, buf);
CryptReleaseContext(hCryptProv, 0);
if (ret) {
while (i < size && buf[i] != 0) {
i++;
}
if (i == size) {
return SUCCESS;
}
}
return FAILURE;
}
/* }}} */