/* * SHA-1 implementation with hardware ESP support added. * * SPDX-FileCopyrightText: The Mbed TLS Contributors * * SPDX-License-Identifier: Apache-2.0 * * SPDX-FileContributor: 2016-2023 Espressif Systems (Shanghai) CO LTD */ /* * The SHA-1 standard was published by NIST in 1993. * * http://www.itl.nist.gov/fipspubs/fip180-1.htm */ #include <mbedtls/build_info.h> #if defined(MBEDTLS_SHA1_C) && defined(MBEDTLS_SHA1_ALT) #include "mbedtls/sha1.h" #include <string.h> #include <assert.h> #if defined(MBEDTLS_SELF_TEST) #if defined(MBEDTLS_PLATFORM_C) #include "mbedtls/platform.h" #else #include <stdio.h> #define mbedtls_printf printf #endif /* MBEDTLS_PLATFORM_C */ #endif /* MBEDTLS_SELF_TEST */ #include "sha/sha_block.h" /* Implementation that should never be optimized out by the compiler */ static void mbedtls_zeroize( void *v, size_t n ) { volatile unsigned char *p = (unsigned char *)v; while ( n-- ) { *p++ = 0; } } /* * 32-bit integer manipulation macros (big endian) */ #ifndef PUT_UINT32_BE #define PUT_UINT32_BE(n,b,i) \ { \ (b)[(i) ] = (unsigned char) ( (n) >> 24 ); \ (b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \ (b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \ (b)[(i) + 3] = (unsigned char) ( (n) ); \ } #endif void mbedtls_sha1_init( mbedtls_sha1_context *ctx ) { assert(ctx != NULL); memset( ctx, 0, sizeof( mbedtls_sha1_context ) ); } void mbedtls_sha1_free( mbedtls_sha1_context *ctx ) { if ( ctx == NULL ) { return; } mbedtls_zeroize( ctx, sizeof( mbedtls_sha1_context ) ); } void mbedtls_sha1_clone( mbedtls_sha1_context *dst, const mbedtls_sha1_context *src ) { memcpy(dst, src, sizeof(mbedtls_sha1_context)); } /* * SHA-1 context setup */ int mbedtls_sha1_starts( mbedtls_sha1_context *ctx ) { ctx->total[0] = 0; ctx->total[1] = 0; memset( ctx, 0, sizeof( mbedtls_sha1_context ) ); ctx->mode = SHA1; return 0; } static void esp_internal_sha_update_state(mbedtls_sha1_context *ctx) { if (ctx->sha_state == ESP_SHA1_STATE_INIT) { ctx->first_block = true; ctx->sha_state = ESP_SHA1_STATE_IN_PROCESS; } else if (ctx->sha_state == ESP_SHA1_STATE_IN_PROCESS) { ctx->first_block = false; esp_sha_write_digest_state(ctx->mode, ctx->state); } } static void esp_internal_sha1_block_process(mbedtls_sha1_context *ctx, const uint8_t *data) { esp_sha_block(SHA1, data, ctx->first_block); if (ctx->first_block) { ctx->first_block = false; } } int mbedtls_internal_sha1_process( mbedtls_sha1_context *ctx, const unsigned char data[64] ) { esp_sha_acquire_hardware(); esp_internal_sha_update_state(ctx); esp_sha_block(ctx->mode, data, ctx->first_block); esp_sha_read_digest_state(ctx->mode, ctx->state); esp_sha_release_hardware(); return 0; } int mbedtls_sha1_update( mbedtls_sha1_context *ctx, const unsigned char *input, size_t ilen ) { size_t fill; uint32_t left, local_len = 0; if ( !ilen || (input == NULL)) { return 0; } left = ctx->total[0] & 0x3F; fill = 64 - left; ctx->total[0] += (uint32_t) ilen; ctx->total[0] &= 0xFFFFFFFF; if ( ctx->total[0] < (uint32_t) ilen ) { ctx->total[1]++; } if ( left && ilen >= fill ) { memcpy( (void *) (ctx->buffer + left), input, fill ); input += fill; ilen -= fill; left = 0; local_len = 64; } if ( (ilen >= 64) || local_len) { esp_sha_acquire_hardware(); esp_internal_sha_update_state(ctx); /* First process buffered block, if any */ if ( local_len ) { esp_internal_sha1_block_process(ctx, ctx->buffer); } while ( ilen >= 64 ) { esp_internal_sha1_block_process(ctx, input); input += 64; ilen -= 64; } esp_sha_read_digest_state(SHA1, ctx->state); esp_sha_release_hardware(); } if ( ilen > 0 ) { memcpy( (void *) (ctx->buffer + left), input, ilen); } return 0; } static const unsigned char sha1_padding[64] = { 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; /* * SHA-1 final digest */ int mbedtls_sha1_finish( mbedtls_sha1_context *ctx, unsigned char output[20] ) { int ret = -1; uint32_t last, padn; uint32_t high, low; unsigned char msglen[8]; high = ( ctx->total[0] >> 29 ) | ( ctx->total[1] << 3 ); low = ( ctx->total[0] << 3 ); PUT_UINT32_BE( high, msglen, 0 ); PUT_UINT32_BE( low, msglen, 4 ); last = ctx->total[0] & 0x3F; padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last ); if ( ( ret = mbedtls_sha1_update( ctx, sha1_padding, padn ) ) != 0 ) { return ret; } if ( ( ret = mbedtls_sha1_update( ctx, msglen, 8 ) ) != 0 ) { return ret; } memcpy(output, ctx->state, 20); return ret; } #endif /* MBEDTLS_SHA1_C && MBEDTLS_SHA1_ALT */