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/*
* Copyright (C) 2008-2011 Free Software Foundation, Inc.
*
* Author: Nikos Mavrogiannopoulos
*
* This file is part of GnuTLS.
*
* The GnuTLS is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 3 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
/* This file provides is the backend hash/mac API for libgcrypt.
*/
#include <gnutls_int.h>
#include <gnutls_hash_int.h>
#include <gnutls_errors.h>
#include <gcrypt.h>
static int
wrap_gcry_mac_init (gnutls_mac_algorithm_t algo, void **ctx)
{
int err;
unsigned int flags = GCRY_MD_FLAG_HMAC;
switch (algo)
{
case GNUTLS_MAC_MD5:
err = gcry_md_open ((gcry_md_hd_t *) ctx, GCRY_MD_MD5, flags);
break;
case GNUTLS_MAC_SHA1:
err = gcry_md_open ((gcry_md_hd_t *) ctx, GCRY_MD_SHA1, flags);
break;
case GNUTLS_MAC_RMD160:
err = gcry_md_open ((gcry_md_hd_t *) ctx, GCRY_MD_RMD160, flags);
break;
case GNUTLS_MAC_MD2:
err = gcry_md_open ((gcry_md_hd_t *) ctx, GCRY_MD_MD2, flags);
break;
case GNUTLS_MAC_SHA256:
err = gcry_md_open ((gcry_md_hd_t *) ctx, GCRY_MD_SHA256, flags);
break;
case GNUTLS_MAC_SHA384:
err = gcry_md_open ((gcry_md_hd_t *) ctx, GCRY_MD_SHA384, flags);
break;
case GNUTLS_MAC_SHA512:
err = gcry_md_open ((gcry_md_hd_t *) ctx, GCRY_MD_SHA512, flags);
break;
default:
gnutls_assert ();
return GNUTLS_E_INVALID_REQUEST;
}
if (err == 0)
return 0;
gnutls_assert ();
return GNUTLS_E_ENCRYPTION_FAILED;
}
static int
wrap_gcry_md_setkey (void *ctx, const void *key, size_t keylen)
{
return gcry_md_setkey ((gcry_md_hd_t) ctx, key, keylen);
}
static int
wrap_gcry_md_write (void *ctx, const void *text, size_t textsize)
{
gcry_md_write (ctx, text, textsize);
return GNUTLS_E_SUCCESS;
}
static int
wrap_gcry_md_copy (void **bhd, void *ahd)
{
return gcry_md_copy ((gcry_md_hd_t *) bhd, (gcry_md_hd_t) ahd);
}
static void
wrap_gcry_md_close (void *hd)
{
gcry_md_close (hd);
}
static void
wrap_gcry_md_reset (void *hd)
{
gcry_md_reset (hd);
}
static int
wrap_gcry_hash_init (gnutls_mac_algorithm_t algo, void **ctx)
{
int err;
unsigned int flags = 0;
switch (algo)
{
case GNUTLS_DIG_MD5:
err = gcry_md_open ((gcry_md_hd_t *) ctx, GCRY_MD_MD5, flags);
break;
case GNUTLS_DIG_SHA1:
err = gcry_md_open ((gcry_md_hd_t *) ctx, GCRY_MD_SHA1, flags);
break;
case GNUTLS_DIG_RMD160:
err = gcry_md_open ((gcry_md_hd_t *) ctx, GCRY_MD_RMD160, flags);
break;
case GNUTLS_DIG_MD2:
err = gcry_md_open ((gcry_md_hd_t *) ctx, GCRY_MD_MD2, flags);
break;
case GNUTLS_DIG_SHA256:
err = gcry_md_open ((gcry_md_hd_t *) ctx, GCRY_MD_SHA256, flags);
break;
case GNUTLS_DIG_SHA224:
err = gcry_md_open ((gcry_md_hd_t *) ctx, GCRY_MD_SHA224, flags);
break;
case GNUTLS_DIG_SHA384:
err = gcry_md_open ((gcry_md_hd_t *) ctx, GCRY_MD_SHA384, flags);
break;
case GNUTLS_DIG_SHA512:
err = gcry_md_open ((gcry_md_hd_t *) ctx, GCRY_MD_SHA512, flags);
break;
default:
gnutls_assert ();
return GNUTLS_E_INVALID_REQUEST;
}
if (err == 0)
return 0;
gnutls_assert ();
return GNUTLS_E_ENCRYPTION_FAILED;
}
static int
wrap_gcry_mac_output (void *src_ctx, void *digest, size_t digestsize)
{
opaque *_digest = gcry_md_read (src_ctx, 0);
if (_digest != NULL)
{
unsigned int len = gcry_md_get_algo_dlen (gcry_md_get_algo (src_ctx));
if (len <= digestsize && digest != NULL)
memcpy (digest, _digest, len);
return 0;
}
gnutls_assert ();
return GNUTLS_E_HASH_FAILED;
}
gnutls_crypto_mac_st _gnutls_mac_ops = {
.init = wrap_gcry_mac_init,
.setkey = wrap_gcry_md_setkey,
.hash = wrap_gcry_md_write,
.reset = wrap_gcry_md_reset,
.output = wrap_gcry_mac_output,
.deinit = wrap_gcry_md_close,
};
gnutls_crypto_digest_st _gnutls_digest_ops = {
.init = wrap_gcry_hash_init,
.hash = wrap_gcry_md_write,
.copy = wrap_gcry_md_copy,
.reset = wrap_gcry_md_reset,
.output = wrap_gcry_mac_output,
.deinit = wrap_gcry_md_close,
};
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