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/*
* Licensed Materials - Property of IBM
*
* trousers - An open source TCG Software Stack
*
* (C) Copyright International Business Machines Corp. 2004-2006
*
*/
/*
* hash.c - openssl TSS crypto routines
*
* Kent Yoder <shpedoikal@gmail.com>
*
*/
#include <string.h>
#include <openssl/opensslv.h>
#include <openssl/rsa.h> // for some reason the MGF1 prototype is in here
#include <openssl/evp.h>
#include <openssl/hmac.h>
#include <openssl/err.h>
#include <openssl/sha.h>
#include "trousers/tss.h"
#include "trousers/trousers.h"
#include "trousers_types.h"
#include "spi_utils.h"
#include "tsplog.h"
#ifdef TSS_DEBUG
#define DEBUG_print_openssl_errors() \
do { \
ERR_load_crypto_strings(); \
ERR_print_errors_fp(stderr); \
} while (0)
#else
#define DEBUG_print_openssl_errors()
#endif
#if (OPENSSL_VERSION_NUMBER >= 0x0090800FL)
#define OpenSSL_MGF1(m,mlen,s,slen,md) PKCS1_MGF1(m,mlen,s,slen,md)
#else
int MGF1(unsigned char *, long, const unsigned char *, long);
#define OpenSSL_MGF1(m,mlen,s,slen,md) MGF1(m,mlen,s,slen)
#endif
/*
* Hopefully this will make the code clearer since
* OpenSSL returns 1 on success
*/
#define EVP_SUCCESS 1
TSS_RESULT
Trspi_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 = TSPERR(TSS_E_BAD_PARAMETER);
goto out;
break;
}
if (rv != EVP_SUCCESS) {
rv = TSPERR(TSS_E_INTERNAL_ERROR);
goto err;
}
rv = EVP_DigestUpdate(&md_ctx, Buf, BufSize);
if (rv != EVP_SUCCESS) {
rv = TSPERR(TSS_E_INTERNAL_ERROR);
goto err;
}
result_size = EVP_MD_CTX_size(&md_ctx);
rv = EVP_DigestFinal(&md_ctx, Digest, &result_size);
if (rv != EVP_SUCCESS) {
rv = TSPERR(TSS_E_INTERNAL_ERROR);
goto err;
} else
rv = TSS_SUCCESS;
goto out;
err:
DEBUG_print_openssl_errors();
out:
return rv;
}
TSS_RESULT
Trspi_HashInit(Trspi_HashCtx *ctx, UINT32 HashType)
{
int rv;
EVP_MD *md;
switch (HashType) {
case TSS_HASH_SHA1:
md = (EVP_MD *)EVP_sha1();
break;
default:
return TSPERR(TSS_E_BAD_PARAMETER);
break;
}
if ((ctx->ctx = malloc(sizeof(EVP_MD_CTX))) == NULL)
return TSPERR(TSS_E_OUTOFMEMORY);
rv = EVP_DigestInit((EVP_MD_CTX *)ctx->ctx, (const EVP_MD *)md);
if (rv != EVP_SUCCESS) {
DEBUG_print_openssl_errors();
return TSPERR(TSS_E_INTERNAL_ERROR);
}
return TSS_SUCCESS;
}
TSS_RESULT
Trspi_HashUpdate(Trspi_HashCtx *ctx, UINT32 size, BYTE *data)
{
int rv;
if (ctx == NULL || ctx->ctx == NULL)
return TSPERR(TSS_E_INTERNAL_ERROR);
if (data == NULL && size)
return TSPERR(TSS_E_BAD_PARAMETER);
if (!size)
return TSS_SUCCESS;
rv = EVP_DigestUpdate(ctx->ctx, data, size);
if (rv != EVP_SUCCESS) {
DEBUG_print_openssl_errors();
free(ctx->ctx);
ctx->ctx = NULL;
return TSPERR(TSS_E_INTERNAL_ERROR);
}
return TSS_SUCCESS;
}
TSS_RESULT
Trspi_HashFinal(Trspi_HashCtx *ctx, BYTE *digest)
{
int rv;
UINT32 result_size;
if (ctx == NULL || ctx->ctx == NULL)
return TSPERR(TSS_E_INTERNAL_ERROR);
result_size = EVP_MD_CTX_size((EVP_MD_CTX *)ctx->ctx);
rv = EVP_DigestFinal(ctx->ctx, digest, &result_size);
if (rv != EVP_SUCCESS)
return TSPERR(TSS_E_INTERNAL_ERROR);
free(ctx->ctx);
ctx->ctx = NULL;
return TSS_SUCCESS;
}
UINT32
Trspi_HMAC(UINT32 HashType, UINT32 SecretSize, BYTE* Secret, UINT32 BufSize, BYTE* Buf, BYTE* hmacOut)
{
/*HMAC_CTX hmac_ctx;*/
const EVP_MD *md;
unsigned int len;
int rv = TSS_SUCCESS;
switch (HashType) {
case TSS_HASH_SHA1:
md = EVP_sha1();
break;
default:
rv = TSPERR(TSS_E_BAD_PARAMETER);
goto out;
break;
}
len = EVP_MD_size(md);
HMAC(md, Secret, SecretSize, Buf, BufSize, hmacOut, &len);
out:
return rv;
}
TSS_RESULT
Trspi_MGF1(UINT32 alg, UINT32 seedLen, BYTE *seed, UINT32 outLen, BYTE *out)
{
const EVP_MD *md;
long olen = outLen, slen = seedLen;
int rv = TSS_SUCCESS;
switch (alg) {
case TSS_HASH_SHA1:
md = EVP_sha1();
break;
default:
rv = TSPERR(TSS_E_BAD_PARAMETER);
goto out;
break;
}
rv = OpenSSL_MGF1(out, olen, seed, slen, md);
out:
return rv;
}
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