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avutil/random_seed: use bcrypt instead of the old wincrypt API

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Remove the wincrypt API calls since we don't support XP anymore and bcrypt is
available since Vista, even on Windows Store builds.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
Steve Lhomme 2018-04-03 11:44:25 +02:00 • committed by James Almer
parent a56580b117
commit aedbf1640c
2 changed files with 13 additions and 12 deletions
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19
libavutil/random_seed.c
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@ -26,9 +26,9 @@
#if HAVE_IO_H
#include <io.h>
#endif
#if HAVE_WINCRYPT
#if HAVE_BCRYPT
#include <windows.h>
#include <wincrypt.h>
#include <bcrypt.h>
#endif
#include <fcntl.h>
#include <math.h>
@ -121,13 +121,14 @@ uint32_t av_get_random_seed(void)
{
uint32_t seed;
#if HAVE_WINCRYPT
HCRYPTPROV provider;
if (CryptAcquireContext(&provider, NULL, NULL, PROV_RSA_FULL,
CRYPT_VERIFYCONTEXT | CRYPT_SILENT)) {
BOOL ret = CryptGenRandom(provider, sizeof(seed), (PBYTE) &seed);
CryptReleaseContext(provider, 0);
if (ret)
#if HAVE_BCRYPT
BCRYPT_ALG_HANDLE algo_handle;
NTSTATUS ret = BCryptOpenAlgorithmProvider(&algo_handle, BCRYPT_RNG_ALGORITHM,
MS_PRIMITIVE_PROVIDER, 0);
if (BCRYPT_SUCCESS(ret)) {
NTSTATUS ret = BCryptGenRandom(algo_handle, (UCHAR*)&seed, sizeof(seed), 0);
BCryptCloseAlgorithmProvider(algo_handle, 0);
if (BCRYPT_SUCCESS(ret))
return seed;
}
#endif