118 lines
2.4 KiB
C
118 lines
2.4 KiB
C
/*
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* FIPS-180-1 compliant SHA-1 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-1 standard was published by NIST in 1993.
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*
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* http://www.itl.nist.gov/fipspubs/fip180-1.htm
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*/
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#include "port/sha1_alt.h"
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#if defined(ESP_SHA1_C)
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#include <string.h>
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#include "multi_thread.h"
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/* Implementation that should never be optimized out by the compiler */
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static void sha1_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 sha1_init( SHA1_CTX *ctx )
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{
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memset( ctx, 0, sizeof( SHA1_CTX ) );
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SHA1_LOCK();
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SHA1_TAKE();
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ets_sha_enable();
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SHA1_UNLOCK();
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}
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void sha1_free( SHA1_CTX *ctx )
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{
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if( ctx == NULL )
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return;
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sha1_zeroize( ctx, sizeof( SHA1_CTX ) );
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SHA1_LOCK();
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SHA1_GIVE();
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if (false == SHA1_IS_USED())
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ets_sha_disable();
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SHA1_UNLOCK();
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}
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void sha1_clone( SHA1_CTX *dst, const SHA1_CTX *src )
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{
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*dst = *src;
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}
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void sha1_process(SHA1_CTX *ctx, const unsigned char data[64])
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{
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}
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/*
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* SHA-1 context setup
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*/
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void sha1_starts( SHA1_CTX *ctx )
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{
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SHA1_LOCK();
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ets_sha_init(&ctx->context);
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SHA1_UNLOCK();
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ctx->context_type = SHA1;
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}
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/*
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* SHA-1 process buffer
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*/
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void sha1_update( SHA1_CTX *ctx, const unsigned char *input, size_t ilen )
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{
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SHA1_LOCK();
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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-1 final digest
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*/
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void sha1_finish( SHA1_CTX *ctx, unsigned char output[20] )
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{
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ets_sha_finish(&ctx->context, ctx->context_type, output);
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SHA1_UNLOCK();
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}
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/*
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* output = SHA-1( input buffer )
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*/
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void sha1_output( const unsigned char *input, size_t ilen, unsigned char output[20] )
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{
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SHA1_CTX ctx;
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sha1_init( &ctx );
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sha1_starts( &ctx );
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sha1_update( &ctx, input, ilen );
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sha1_finish( &ctx, output );
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sha1_free( &ctx );
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}
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#endif /* _SHA1_C */
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