2016-08-05 09:40:32 +00:00
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/*
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* FIPS-180-2 compliant SHA-384/512 implementation
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*
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* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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/*
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* The SHA-512 Secure Hash Standard was published by NIST in 2002.
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*
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* http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
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*/
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#include "port/sha512_alt.h"
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#if defined(ESP_SHA512_C)
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#include <string.h>
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2016-08-08 05:56:36 +00:00
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#include "multi_thread.h"
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2016-08-05 09:40:32 +00:00
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/* Implementation that should never be optimized out by the compiler */
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static void sha512_zeroize( void *v, size_t n ) {
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volatile unsigned char *p = v; while( n-- ) *p++ = 0;
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}
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void sha512_init( SHA512_CTX *ctx )
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{
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memset( ctx, 0, sizeof( SHA512_CTX ) );
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2016-08-08 05:56:36 +00:00
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SHA512_LOCK();
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SHA512_TAKE();
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2016-08-05 09:40:32 +00:00
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ets_sha_enable();
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2016-08-08 05:56:36 +00:00
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SHA512_UNLOCK();
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2016-08-05 09:40:32 +00:00
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}
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void sha512_free( SHA512_CTX *ctx )
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{
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if( ctx == NULL )
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return;
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sha512_zeroize( ctx, sizeof( SHA512_CTX ) );
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2016-08-08 05:56:36 +00:00
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SHA512_LOCK();
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SHA512_GIVE();
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if (false == SHA512_IS_USED())
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ets_sha_disable();
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SHA512_UNLOCK();
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2016-08-05 09:40:32 +00:00
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}
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void sha512_clone( SHA512_CTX *dst, const SHA512_CTX *src )
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{
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*dst = *src;
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}
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/*
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* SHA-512 context setup
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*/
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void sha512_starts( SHA512_CTX *ctx, int is384 )
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{
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2016-08-08 05:56:36 +00:00
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SHA512_LOCK();
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2016-08-05 09:40:32 +00:00
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ets_sha_init(&ctx->context);
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2016-08-08 05:56:36 +00:00
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SHA512_UNLOCK();
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2016-08-05 09:40:32 +00:00
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if( is384 == 0 )
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{
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/* SHA-512 */
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ctx->context_type = SHA2_512;
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}
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else
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{
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/* SHA-384 */
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ctx->context_type = SHA2_384;
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}
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}
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/*
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* SHA-512 process buffer
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*/
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void sha512_update( SHA512_CTX *ctx, const unsigned char *input,size_t ilen )
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{
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2016-08-08 05:56:36 +00:00
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SHA512_LOCK();
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2016-08-05 09:40:32 +00:00
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ets_sha_update(&ctx->context, ctx->context_type, input, ilen * 8);
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}
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/*
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* SHA-512 final digest
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*/
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void sha512_finish( SHA512_CTX *ctx, unsigned char output[64] )
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{
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ets_sha_finish(&ctx->context, ctx->context_type, output);
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2016-08-08 05:56:36 +00:00
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SHA512_UNLOCK();
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2016-08-05 09:40:32 +00:00
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}
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/*
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* output = SHA-512( input buffer )
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*/
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void sha512_output( const unsigned char *input, size_t ilen,unsigned char output[64], int is384 )
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{
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SHA512_CTX ctx;
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sha512_init( &ctx );
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sha512_starts( &ctx, is384 );
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sha512_update( &ctx, input, ilen );
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sha512_finish( &ctx, output );
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sha512_free( &ctx );
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}
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#endif /* SHA512_C */
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