mirror of
https://github.com/espressif/esp-idf.git
synced 2025-11-03 22:08:28 +00:00
1c8fd4041e
Removed the old dynamically allocated GDMA channel approach. It proved too unreliable as we couldn't not ensure consumers of the mbedtls would properly free the channels after use. Replaced by a single shared GDMA channel for AES and SHA, which won't be released unless user specifically calls API for releasing it.
319 lines
7.9 KiB
C
319 lines
7.9 KiB
C
/*
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* SHA-512 implementation with hardware ESP support added.
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*
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* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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* Additions Copyright (C) 2016-2020, Espressif Systems (Shanghai) PTE LTD
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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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#if !defined(MBEDTLS_CONFIG_FILE)
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#include "mbedtls/config.h"
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#else
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#include MBEDTLS_CONFIG_FILE
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#endif
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#if defined(MBEDTLS_SHA512_C) && defined(MBEDTLS_SHA512_ALT)
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#include "mbedtls/sha512.h"
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#if defined(_MSC_VER) || defined(__WATCOMC__)
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#define UL64(x) x##ui64
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#else
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#define UL64(x) x##ULL
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#endif
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#include <string.h>
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#if defined(MBEDTLS_SELF_TEST)
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#if defined(MBEDTLS_PLATFORM_C)
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#include "mbedtls/platform.h"
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#else
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#include <stdio.h>
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#define mbedtls_printf printf
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#endif /* MBEDTLS_PLATFORM_C */
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#endif /* MBEDTLS_SELF_TEST */
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#include "sha/sha_dma.h"
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/* Implementation that should never be optimized out by the compiler */
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static void mbedtls_zeroize( void *v, size_t n )
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{
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volatile unsigned char *p = v;
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while ( n-- ) {
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*p++ = 0;
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}
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}
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/*
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* 64-bit integer manipulation macros (big endian)
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*/
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#ifndef PUT_UINT64_BE
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#define PUT_UINT64_BE(n,b,i) \
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{ \
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(b)[(i) ] = (unsigned char) ( (n) >> 56 ); \
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(b)[(i) + 1] = (unsigned char) ( (n) >> 48 ); \
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(b)[(i) + 2] = (unsigned char) ( (n) >> 40 ); \
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(b)[(i) + 3] = (unsigned char) ( (n) >> 32 ); \
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(b)[(i) + 4] = (unsigned char) ( (n) >> 24 ); \
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(b)[(i) + 5] = (unsigned char) ( (n) >> 16 ); \
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(b)[(i) + 6] = (unsigned char) ( (n) >> 8 ); \
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(b)[(i) + 7] = (unsigned char) ( (n) ); \
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}
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#endif /* PUT_UINT64_BE */
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void esp_sha512_set_mode(mbedtls_sha512_context *ctx, esp_sha_type type)
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{
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switch (type) {
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case SHA2_384:
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case SHA2_512224:
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case SHA2_512256:
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case SHA2_512T:
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ctx->mode = type;
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break;
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default:
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ctx->mode = SHA2_512;
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break;
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}
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}
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/* For SHA512/t mode the intial hash value will depend on t */
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void esp_sha512_set_t( mbedtls_sha512_context *ctx, uint16_t t_val)
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{
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ctx->t_val = t_val;
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}
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void mbedtls_sha512_init( mbedtls_sha512_context *ctx )
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{
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memset( ctx, 0, sizeof( mbedtls_sha512_context ) );
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}
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void mbedtls_sha512_free( mbedtls_sha512_context *ctx )
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{
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if ( ctx == NULL ) {
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return;
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}
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mbedtls_zeroize( ctx, sizeof( mbedtls_sha512_context ) );
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}
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void mbedtls_sha512_clone( mbedtls_sha512_context *dst,
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const mbedtls_sha512_context *src )
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{
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memcpy(dst, src, sizeof(mbedtls_sha512_context));
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}
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/*
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* SHA-512 context setup
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*/
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int mbedtls_sha512_starts_ret( mbedtls_sha512_context *ctx, int is384 )
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{
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mbedtls_zeroize( ctx, sizeof( mbedtls_sha512_context ) );
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if ( is384 ) {
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ctx->mode = SHA2_384;
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} else {
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ctx->mode = SHA2_512;
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}
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return 0;
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}
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#if !defined(MBEDTLS_DEPRECATED_REMOVED)
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void mbedtls_sha512_starts( mbedtls_sha512_context *ctx,
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int is384 )
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{
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mbedtls_sha512_starts_ret( ctx, is384 );
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}
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#endif
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static int esp_internal_sha512_dma_process(mbedtls_sha512_context *ctx,
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const uint8_t *data, size_t len,
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uint8_t *buf, size_t buf_len)
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{
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return esp_sha_dma(ctx->mode, data, len, buf, buf_len, ctx->first_block);
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}
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int mbedtls_internal_sha512_process( mbedtls_sha512_context *ctx, const unsigned char data[128] )
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{
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int ret;
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esp_sha_acquire_hardware();
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ret = esp_internal_sha512_dma_process(ctx, data, 128, 0, 0);
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esp_sha_release_hardware();
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return ret;
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}
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#if !defined(MBEDTLS_DEPRECATED_REMOVED)
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void mbedtls_sha512_process( mbedtls_sha512_context *ctx,
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const unsigned char data[128] )
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{
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mbedtls_internal_sha512_process( ctx, data );
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}
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#endif
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/*
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* SHA-512 process buffer
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*/
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int mbedtls_sha512_update_ret( mbedtls_sha512_context *ctx, const unsigned char *input,
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size_t ilen )
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{
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int ret;
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size_t fill;
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unsigned int left, len, local_len = 0;
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if ( ilen == 0 ) {
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return 0;
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}
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left = (unsigned int) (ctx->total[0] & 0x7F);
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fill = 128 - left;
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ctx->total[0] += (uint64_t) ilen;
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if ( ctx->total[0] < (uint64_t) ilen ) {
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ctx->total[1]++;
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}
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if ( left && ilen >= fill ) {
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memcpy( (void *) (ctx->buffer + left), input, fill );
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input += fill;
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ilen -= fill;
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left = 0;
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local_len = 128;
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}
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len = (ilen / 128) * 128;
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if ( len || local_len) {
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esp_sha_acquire_hardware();
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if (ctx->sha_state == ESP_SHA512_STATE_INIT) {
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if (ctx->mode == SHA2_512T) {
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esp_sha_512_t_init_hash(ctx->t_val);
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ctx->first_block = false;
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} else {
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ctx->first_block = true;
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}
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ctx->sha_state = ESP_SHA512_STATE_IN_PROCESS;
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} else if (ctx->sha_state == ESP_SHA512_STATE_IN_PROCESS) {
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ctx->first_block = false;
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esp_sha_write_digest_state(ctx->mode, ctx->state);
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}
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ret = esp_internal_sha512_dma_process(ctx, input, len, ctx->buffer, local_len);
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esp_sha_read_digest_state(ctx->mode, ctx->state);
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esp_sha_release_hardware();
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if (ret != 0) {
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return ret;
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}
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}
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if ( ilen > 0 ) {
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memcpy( (void *) (ctx->buffer + left), input + len, ilen - len );
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}
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return 0;
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}
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#if !defined(MBEDTLS_DEPRECATED_REMOVED)
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void mbedtls_sha512_update( mbedtls_sha512_context *ctx,
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const unsigned char *input,
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size_t ilen )
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{
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mbedtls_sha512_update_ret( ctx, input, ilen );
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}
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#endif
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static const unsigned char sha512_padding[128] = {
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0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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};
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/*
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* SHA-512 final digest
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*/
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int mbedtls_sha512_finish_ret( mbedtls_sha512_context *ctx, unsigned char output[64] )
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{
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int ret;
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size_t last, padn;
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uint64_t high, low;
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unsigned char msglen[16];
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high = ( ctx->total[0] >> 61 )
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| ( ctx->total[1] << 3 );
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low = ( ctx->total[0] << 3 );
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PUT_UINT64_BE( high, msglen, 0 );
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PUT_UINT64_BE( low, msglen, 8 );
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last = (size_t)( ctx->total[0] & 0x7F );
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padn = ( last < 112 ) ? ( 112 - last ) : ( 240 - last );
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if ( ( ret = mbedtls_sha512_update_ret( ctx, sha512_padding, padn ) ) != 0 ) {
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return ret;
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}
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if ( ( ret = mbedtls_sha512_update_ret( ctx, msglen, 16 ) ) != 0 ) {
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return ret;
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}
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if (ctx->mode == SHA2_384) {
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memcpy(output, ctx->state, 48);
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} else {
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memcpy(output, ctx->state, 64);
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}
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return ret;
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}
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#if !defined(MBEDTLS_DEPRECATED_REMOVED)
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void mbedtls_sha512_finish( mbedtls_sha512_context *ctx,
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unsigned char output[64] )
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{
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mbedtls_sha512_finish_ret( ctx, output );
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}
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#endif
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#endif /* MBEDTLS_SHA512_C && MBEDTLS_SHA512_ALT */
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