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win32 rand - just leak the crypt handle

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* it will be closed so or so atexit
* the user could request more random data in another atexit routine
  leading to another atexit routine being registered
This commit is contained in:
Daniel Mendler 2019-05-12 11:18:17 +02:00 committed by Steffen Jaeckel
parent 2a2e2716c2
commit 16ff016ebe
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GPG Key ID: AF0CB17621EDAD72
1 changed files with 5 additions and 12 deletions
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17
bn_s_mp_rand_platform.c
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@ -26,25 +26,18 @@
#include <windows.h>
#include <wincrypt.h>
static HCRYPTPROV hProv = 0;
static void s_cleanup_win_csp(void)
{
CryptReleaseContext(hProv, 0);
hProv = 0;
}
static int s_read_win_csp(void *p, size_t n)
{
static HCRYPTPROV hProv = 0;
if (hProv == 0) {
if (!CryptAcquireContext(&hProv, NULL, MS_DEF_PROV, PROV_RSA_FULL,
HCRYPTPROV h = 0;
if (!CryptAcquireContext(&h, NULL, MS_DEF_PROV, PROV_RSA_FULL,
(CRYPT_VERIFYCONTEXT | CRYPT_MACHINE_KEYSET)) &&
!CryptAcquireContext(&hProv, NULL, MS_DEF_PROV, PROV_RSA_FULL,
!CryptAcquireContext(&h, NULL, MS_DEF_PROV, PROV_RSA_FULL,
CRYPT_VERIFYCONTEXT | CRYPT_MACHINE_KEYSET | CRYPT_NEWKEYSET)) {
hProv = 0;
return MP_ERR;
}
atexit(s_cleanup_win_csp);
hProc = h;
}
return CryptGenRandom(hProv, (DWORD)n, (BYTE *)p) == TRUE ? MP_OKAY : MP_ERR;
}