mirror of
https://github.com/espressif/esp-idf.git
synced 2024-10-05 20:47:46 -04:00
213 lines
4.9 KiB
C
213 lines
4.9 KiB
C
/*
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* SHA-1 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-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 <mbedtls/build_info.h>
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#if defined(MBEDTLS_SHA1_C) && defined(MBEDTLS_SHA1_ALT)
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#include "mbedtls/sha1.h"
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#include <string.h>
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#include <assert.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_block.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 = (unsigned char *)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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* 32-bit integer manipulation macros (big endian)
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*/
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#ifndef PUT_UINT32_BE
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#define PUT_UINT32_BE(n,b,i) \
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{ \
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(b)[(i) ] = (unsigned char) ( (n) >> 24 ); \
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(b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \
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(b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \
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(b)[(i) + 3] = (unsigned char) ( (n) ); \
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}
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#endif
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void mbedtls_sha1_init( mbedtls_sha1_context *ctx )
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{
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assert(ctx != NULL);
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memset( ctx, 0, sizeof( mbedtls_sha1_context ) );
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}
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void mbedtls_sha1_free( mbedtls_sha1_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_sha1_context ) );
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}
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void mbedtls_sha1_clone( mbedtls_sha1_context *dst,
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const mbedtls_sha1_context *src )
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{
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memcpy(dst, src, sizeof(mbedtls_sha1_context));
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}
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/*
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* SHA-1 context setup
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*/
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int mbedtls_sha1_starts( mbedtls_sha1_context *ctx )
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{
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ctx->total[0] = 0;
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ctx->total[1] = 0;
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memset( ctx, 0, sizeof( mbedtls_sha1_context ) );
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ctx->mode = SHA1;
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return 0;
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}
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static void esp_internal_sha1_block_process(mbedtls_sha1_context *ctx, const uint8_t *data)
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{
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esp_sha_block(SHA1, data, ctx->first_block);
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if (ctx->first_block) {
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ctx->first_block = false;
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}
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}
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int mbedtls_internal_sha1_process( mbedtls_sha1_context *ctx, const unsigned char data[64] )
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{
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esp_sha_acquire_hardware();
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esp_sha_block(ctx->mode, data, ctx->first_block);
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esp_sha_release_hardware();
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return 0;
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}
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int mbedtls_sha1_update( mbedtls_sha1_context *ctx, const unsigned char *input, size_t ilen )
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{
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size_t fill;
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uint32_t left, local_len = 0;
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if ( !ilen || (input == NULL)) {
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return 0;
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}
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left = ctx->total[0] & 0x3F;
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fill = 64 - left;
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ctx->total[0] += (uint32_t) ilen;
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ctx->total[0] &= 0xFFFFFFFF;
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if ( ctx->total[0] < (uint32_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 = 64;
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}
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if ( (ilen >= 64) || local_len) {
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esp_sha_acquire_hardware();
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if (ctx->sha_state == ESP_SHA1_STATE_INIT) {
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ctx->first_block = true;
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ctx->sha_state = ESP_SHA1_STATE_IN_PROCESS;
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} else if (ctx->sha_state == ESP_SHA1_STATE_IN_PROCESS) {
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esp_sha_write_digest_state(SHA1, ctx->state);
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}
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/* First process buffered block, if any */
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if ( local_len ) {
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esp_internal_sha1_block_process(ctx, ctx->buffer);
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}
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while ( ilen >= 64 ) {
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esp_internal_sha1_block_process(ctx, input);
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input += 64;
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ilen -= 64;
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}
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esp_sha_read_digest_state(SHA1, ctx->state);
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esp_sha_release_hardware();
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}
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if ( ilen > 0 ) {
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memcpy( (void *) (ctx->buffer + left), input, ilen);
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}
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return 0;
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}
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static const unsigned char sha1_padding[64] = {
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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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};
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/*
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* SHA-1 final digest
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*/
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int mbedtls_sha1_finish( mbedtls_sha1_context *ctx, unsigned char output[20] )
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{
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int ret;
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uint32_t last, padn;
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uint32_t high, low;
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unsigned char msglen[8];
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high = ( ctx->total[0] >> 29 )
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| ( ctx->total[1] << 3 );
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low = ( ctx->total[0] << 3 );
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PUT_UINT32_BE( high, msglen, 0 );
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PUT_UINT32_BE( low, msglen, 4 );
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last = ctx->total[0] & 0x3F;
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padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );
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if ( ( ret = mbedtls_sha1_update( ctx, sha1_padding, padn ) ) != 0 ) {
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return ret;
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}
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if ( ( ret = mbedtls_sha1_update( ctx, msglen, 8 ) ) != 0 ) {
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return ret;
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}
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memcpy(output, ctx->state, 20);
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return ret;
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}
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#endif /* MBEDTLS_SHA1_C && MBEDTLS_SHA1_ALT */
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