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sha256: Added WinCrypt implementation

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This commit is contained in:
Steve Holme 2020-02-20 01:49:31 +00:00
parent 4feb38deed
commit f22a5c35e0
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1 changed files with 39 additions and 0 deletions
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39
lib/sha256.c
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@ -179,6 +179,45 @@ static void SHA256_Final(unsigned char *digest, SHA256_CTX *ctx)
(void) CC_SHA256_Final(digest, ctx);
}
#elif defined(USE_WIN32_CRYPTO)
#include <wincrypt.h>
typedef struct {
HCRYPTPROV hCryptProv;
HCRYPTHASH hHash;
} SHA256_CTX;
static void SHA256_Init(SHA256_CTX *ctx)
{
if(CryptAcquireContext(&ctx->hCryptProv, NULL, NULL,
PROV_RSA_AES, CRYPT_VERIFYCONTEXT)) {
CryptCreateHash(ctx->hCryptProv, CALG_SHA_256, 0, 0, &ctx->hHash);
}
}
static void SHA256_Update(SHA256_CTX *ctx,
const unsigned char *data,
unsigned int length)
{
CryptHashData(ctx->hHash, (unsigned char *) data, length, 0);
}
static void SHA256_Final(unsigned char *digest, SHA256_CTX *ctx)
{
unsigned long length;
CryptGetHashParam(ctx->hHash, HP_HASHVAL, NULL, &length, 0);
if(length == SHA256_DIGEST_LENGTH)
CryptGetHashParam(ctx->hHash, HP_HASHVAL, digest, &length, 0);
if(ctx->hHash)
CryptDestroyHash(ctx->hHash);
if(ctx->hCryptProv)
CryptReleaseContext(ctx->hCryptProv, 0);
}
#else
/* When no other crypto library is available we use this code segment */