diff options
| -rw-r--r-- | lib/sha256.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/lib/sha256.c b/lib/sha256.c index 10ad44b49..6fd283c77 100644 --- a/lib/sha256.c +++ b/lib/sha256.c @@ -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 */ |