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Code Issues Releases Activity

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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6
configure vendored
View File

@ -2142,10 +2142,10 @@ SYSTEM_FUNCS="
"
SYSTEM_LIBRARIES="
bcrypt
vaapi_drm
vaapi_x11
vdpau_x11
wincrypt
"
TOOLCHAIN_FEATURES="
@ -3445,7 +3445,7 @@ avformat_deps="avcodec avutil"
avformat_suggest="libm network zlib"
avresample_deps="avutil"
avresample_suggest="libm"
avutil_suggest="clock_gettime ffnvcodec libm libdrm libmfx opencl user32 vaapi videotoolbox corefoundation corevideo coremedia wincrypt"
avutil_suggest="clock_gettime ffnvcodec libm libdrm libmfx opencl user32 vaapi videotoolbox corefoundation corevideo coremedia bcrypt"
postproc_deps="avutil gpl"
postproc_suggest="libm"
swresample_deps="avutil"
@ -5828,9 +5828,9 @@ check_header asm/types.h
check_builtin stdatomic stdatomic.h "atomic_int foo, bar = ATOMIC_VAR_INIT(-1); atomic_store(&foo, 0); foo += bar"
check_lib advapi32 "windows.h" RegCloseKey -ladvapi32
check_lib bcrypt "windows.h bcrypt.h" BCryptGenRandom -lbcrypt
check_lib ole32 "windows.h" CoTaskMemFree -lole32
check_lib shell32 "windows.h shellapi.h" CommandLineToArgvW -lshell32
check_lib wincrypt "windows.h wincrypt.h" CryptGenRandom -ladvapi32
check_lib psapi "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
check_lib android android/native_window.h ANativeWindow_acquire -landroid

19
libavutil/random_seed.c
View File

@ -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