OVMS3-idf/components/esp32/hwcrypto/sha.c

256 lines
5.5 KiB
C
Raw Normal View History

2016-08-08 09:29:28 +00:00
/*
* ESP32 hardware accelerated SHA1/256/512 implementation
* based on mbedTLS FIPS-197 compliant version.
2016-08-08 09:29:28 +00:00
*
* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
* Additions Copyright (C) 2016, Espressif Systems (Shanghai) PTE Ltd
2016-08-08 09:29:28 +00:00
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
/*
* The SHA-1 standard was published by NIST in 1993.
*
* http://www.itl.nist.gov/fipspubs/fip180-1.htm
*/
#include <string.h>
#include <sys/lock.h>
#include "hwcrypto/sha.h"
#include "rom/ets_sys.h"
2016-08-08 09:29:28 +00:00
static _lock_t sha_lock;
2016-08-08 09:29:28 +00:00
void esp_sha_acquire_hardware( void )
{
/* newlib locks lazy initialize on ESP-IDF */
_lock_acquire(&sha_lock);
ets_sha_enable();
}
void esp_sha_release_hardware( void )
{
/* Want to empty internal SHA buffers where possible,
need to check if this is sufficient for this. */
SHA_CTX zero = { 0 };
ets_sha_init(&zero);
ets_sha_disable();
_lock_release(&sha_lock);
}
void esp_sha1_init( SHA1_CTX *ctx )
{
bzero( ctx, sizeof( SHA1_CTX ) );
2016-08-08 09:29:28 +00:00
}
void esp_sha1_free( SHA1_CTX *ctx )
{
if ( ctx == NULL ) {
2016-08-08 09:29:28 +00:00
return;
}
2016-08-08 09:29:28 +00:00
bzero( ctx, sizeof( SHA1_CTX ) );
2016-08-08 09:29:28 +00:00
}
void esp_sha1_clone( SHA1_CTX *dst, const SHA1_CTX *src )
{
*dst = *src;
}
/*
* SHA-1 context setup
*/
void esp_sha1_start( SHA1_CTX *ctx )
2016-08-08 09:29:28 +00:00
{
esp_sha_acquire_hardware();
ctx->context_type = SHA1;
2016-08-08 09:29:28 +00:00
}
/*
* SHA-1 process buffer
*/
void esp_sha1_update( SHA1_CTX *ctx, const unsigned char *input, size_t ilen )
{
ets_sha_update(&ctx->context, ctx->context_type, input, ilen * 8);
2016-08-08 09:29:28 +00:00
}
/*
* SHA-1 final digest
*/
void esp_sha1_finish( SHA1_CTX *ctx, unsigned char output[20] )
{
ets_sha_finish(&ctx->context, ctx->context_type, output);
esp_sha_release_hardware();
2016-08-08 09:29:28 +00:00
}
/*
* output = SHA-1( input buffer )
*/
void esp_sha1_output( const unsigned char *input, size_t ilen, unsigned char output[20] )
{
SHA1_CTX ctx;
esp_sha1_init( &ctx );
esp_sha1_start( &ctx );
2016-08-08 09:29:28 +00:00
esp_sha1_update( &ctx, input, ilen );
esp_sha1_finish( &ctx, output );
esp_sha1_free( &ctx );
}
void esp_sha256_init( SHA256_CTX *ctx )
{
bzero( ctx, sizeof( SHA256_CTX ) );
2016-08-08 09:29:28 +00:00
}
void esp_sha256_free( SHA256_CTX *ctx )
{
if ( ctx == NULL ) {
2016-08-08 09:29:28 +00:00
return;
}
2016-08-08 09:29:28 +00:00
bzero( ctx, sizeof( SHA256_CTX ) );
2016-08-08 09:29:28 +00:00
}
void esp_sha256_clone( SHA256_CTX *dst, const SHA256_CTX *src )
{
*dst = *src;
}
/*
* SHA-256 context setup
*/
void esp_sha256_start( SHA256_CTX *ctx, int is224 )
2016-08-08 09:29:28 +00:00
{
esp_sha_acquire_hardware();
2016-08-08 09:29:28 +00:00
ets_sha_init(&ctx->context);
if ( is224 == 0 ) {
2016-08-08 09:29:28 +00:00
/* SHA-256 */
ctx->context_type = SHA2_256;
} else {
/* SHA-224 is not supported! */
ctx->context_type = SHA_INVALID;
}
2016-08-08 09:29:28 +00:00
}
/*
* SHA-256 process buffer
*/
void esp_sha256_update( SHA256_CTX *ctx, const unsigned char *input, size_t ilen )
{
ets_sha_update(&ctx->context, ctx->context_type, input, ilen * 8);
2016-08-08 09:29:28 +00:00
}
/*
* SHA-256 final digest
*/
void esp_sha256_finish( SHA256_CTX *ctx, unsigned char output[32] )
{
if ( ctx->context_type == SHA2_256 ) {
ets_sha_finish(&ctx->context, ctx->context_type, output);
} else {
/* No hardware SHA-224 support, but mbedTLS API doesn't allow failure.
For now, zero the output to make it clear it's not valid. */
bzero( output, 28 );
}
esp_sha_release_hardware();
2016-08-08 09:29:28 +00:00
}
/*
* output = SHA-256( input buffer )
*/
void esp_sha256_output( const unsigned char *input, size_t ilen, unsigned char output[32], int is224 )
{
SHA256_CTX ctx;
esp_sha256_init( &ctx );
esp_sha256_start( &ctx, is224 );
2016-08-08 09:29:28 +00:00
esp_sha256_update( &ctx, input, ilen );
esp_sha256_finish( &ctx, output );
esp_sha256_free( &ctx );
}
/////
void esp_sha512_init( SHA512_CTX *ctx )
{
memset( ctx, 0, sizeof( SHA512_CTX ) );
}
2016-08-08 09:29:28 +00:00
void esp_sha512_free( SHA512_CTX *ctx )
{
if ( ctx == NULL ) {
2016-08-08 09:29:28 +00:00
return;
}
2016-08-08 09:29:28 +00:00
bzero( ctx, sizeof( SHA512_CTX ) );
2016-08-08 09:29:28 +00:00
}
void esp_sha512_clone( SHA512_CTX *dst, const SHA512_CTX *src )
{
*dst = *src;
}
/*
* SHA-512 context setup
*/
void esp_sha512_start( SHA512_CTX *ctx, int is384 )
2016-08-08 09:29:28 +00:00
{
esp_sha_acquire_hardware();
ets_sha_init(&ctx->context);
if ( is384 == 0 ) {
2016-08-08 09:29:28 +00:00
/* SHA-512 */
ctx->context_type = SHA2_512;
} else {
2016-08-08 09:29:28 +00:00
/* SHA-384 */
ctx->context_type = SHA2_384;
}
}
/*
* SHA-512 process buffer
*/
void esp_sha512_update( SHA512_CTX *ctx, const unsigned char *input, size_t ilen )
2016-08-08 09:29:28 +00:00
{
ets_sha_update(&ctx->context, ctx->context_type, input, ilen * 8);
}
/*
* SHA-512 final digest
*/
void esp_sha512_finish( SHA512_CTX *ctx, unsigned char output[64] )
{
ets_sha_finish(&ctx->context, ctx->context_type, output);
esp_sha_release_hardware();
2016-08-08 09:29:28 +00:00
}
/*
* output = SHA-512( input buffer )
*/
void esp_sha512_output( const unsigned char *input, size_t ilen, unsigned char output[64], int is384 )
2016-08-08 09:29:28 +00:00
{
SHA512_CTX ctx;
esp_sha512_init( &ctx );
esp_sha512_start( &ctx, is384 );
2016-08-08 09:29:28 +00:00
esp_sha512_update( &ctx, input, ilen );
esp_sha512_finish( &ctx, output );
esp_sha512_free( &ctx );
}
////