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cleanup on-demand loading of psapi and bcrypt on windows

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This commit is contained in:
Daan Leijen 2022-12-19 16:50:13 -08:00
parent 59ea84cadc
commit 505a14bbd8
2 changed files with 24 additions and 25 deletions
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18
src/random.c
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@ -193,21 +193,21 @@ static bool os_random_buf(void* buf, size_t buf_len) {
#endif
typedef LONG (NTAPI *PBCryptGenRandom)(HANDLE, PUCHAR, ULONG, ULONG);
static PBCryptGenRandom pBCryptGenRandom = NULL;
static int BCryptGenRandom_is_initialized = 0;
static PBCryptGenRandom pBCryptGenRandom = NULL;
static bool os_random_buf(void* buf, size_t buf_len) {
if (!BCryptGenRandom_is_initialized) {
HINSTANCE hDll;
hDll = LoadLibrary(TEXT("bcrypt.dll"));
if (pBCryptGenRandom == NULL) {
HINSTANCE hDll = LoadLibrary(TEXT("bcrypt.dll"));
if (hDll != NULL) {
pBCryptGenRandom = (PBCryptGenRandom)(void (*)(void))GetProcAddress(hDll, "BCryptGenRandom");
}
BCryptGenRandom_is_initialized = 1;
}
if (!pBCryptGenRandom)
return 0;
return (pBCryptGenRandom(NULL, (PUCHAR)buf, (ULONG)buf_len, BCRYPT_USE_SYSTEM_PREFERRED_RNG) >= 0);
if (pBCryptGenRandom == NULL) {
return false;
}
else {
return (pBCryptGenRandom(NULL, (PUCHAR)buf, (ULONG)buf_len, BCRYPT_USE_SYSTEM_PREFERRED_RNG) >= 0);
}
}
#endif