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/*
* Licensed Materials - Property of IBM
*
* trousers - An open source TCG Software Stack
*
* (C) Copyright International Business Machines Corp. 2006
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <openssl/evp.h>
#include "trousers/tss.h"
#include "trousers_types.h"
#include "tcs_tsp.h"
#include "tcslog.h"
/*
* Hopefully this will make the code clearer since
* OpenSSL returns 1 on success
*/
#define EVP_SUCCESS 1
TSS_RESULT
Hash(UINT32 HashType, UINT32 BufSize, BYTE* Buf, BYTE* Digest)
{
EVP_MD_CTX md_ctx;
unsigned int result_size;
int rv;
switch (HashType) {
case TSS_HASH_SHA1:
rv = EVP_DigestInit(&md_ctx, EVP_sha1());
break;
default:
rv = TCSERR(TSS_E_BAD_PARAMETER);
goto out;
break;
}
if (rv != EVP_SUCCESS) {
rv = TCSERR(TSS_E_INTERNAL_ERROR);
goto out;
}
rv = EVP_DigestUpdate(&md_ctx, Buf, BufSize);
if (rv != EVP_SUCCESS) {
rv = TCSERR(TSS_E_INTERNAL_ERROR);
goto out;
}
result_size = EVP_MD_CTX_size(&md_ctx);
rv = EVP_DigestFinal(&md_ctx, Digest, &result_size);
if (rv != EVP_SUCCESS) {
rv = TCSERR(TSS_E_INTERNAL_ERROR);
} else
rv = TSS_SUCCESS;
out:
return rv;
}
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