mirror of
https://github.com/espressif/esp-idf.git
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269 lines
6.3 KiB
C
269 lines
6.3 KiB
C
/*
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* SHA-512 implementation with hardware ESP support added.
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*
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* SPDX-FileCopyrightText: The Mbed TLS Contributors
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* SPDX-FileContributor: 2016-2022 Espressif Systems (Shanghai) CO LTD
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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 <mbedtls/build_info.h>
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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( 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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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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/*
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* SHA-512 process buffer
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*/
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int mbedtls_sha512_update( 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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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( mbedtls_sha512_context *ctx, unsigned char *output )
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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( ctx, sha512_padding, padn ) ) != 0 ) {
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return ret;
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}
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if ( ( ret = mbedtls_sha512_update( 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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#endif /* MBEDTLS_SHA512_C && MBEDTLS_SHA512_ALT */
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