Marco Zecchini / Mbed OS Example_RTOS

Rtos API example

mbed-os/features/mbedtls/src/sha256.c@0:9fca2b23d0ba, 2019-02-23 (annotated)

Committer:
marcozecchini
Date:
Sat Feb 23 12:13:36 2019 +0000
Revision:
0:9fca2b23d0ba
final commit

Who changed what in which revision?

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marcozecchini 0:9fca2b23d0ba 1 /*
marcozecchini 0:9fca2b23d0ba 2 * FIPS-180-2 compliant SHA-256 implementation
marcozecchini 0:9fca2b23d0ba 3 *
marcozecchini 0:9fca2b23d0ba 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
marcozecchini 0:9fca2b23d0ba 5 * SPDX-License-Identifier: Apache-2.0
marcozecchini 0:9fca2b23d0ba 6 *
marcozecchini 0:9fca2b23d0ba 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
marcozecchini 0:9fca2b23d0ba 8 * not use this file except in compliance with the License.
marcozecchini 0:9fca2b23d0ba 9 * You may obtain a copy of the License at
marcozecchini 0:9fca2b23d0ba 10 *
marcozecchini 0:9fca2b23d0ba 11 * http://www.apache.org/licenses/LICENSE-2.0
marcozecchini 0:9fca2b23d0ba 12 *
marcozecchini 0:9fca2b23d0ba 13 * Unless required by applicable law or agreed to in writing, software
marcozecchini 0:9fca2b23d0ba 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
marcozecchini 0:9fca2b23d0ba 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
marcozecchini 0:9fca2b23d0ba 16 * See the License for the specific language governing permissions and
marcozecchini 0:9fca2b23d0ba 17 * limitations under the License.
marcozecchini 0:9fca2b23d0ba 18 *
marcozecchini 0:9fca2b23d0ba 19 * This file is part of mbed TLS (https://tls.mbed.org)
marcozecchini 0:9fca2b23d0ba 20 */
marcozecchini 0:9fca2b23d0ba 21 /*
marcozecchini 0:9fca2b23d0ba 22 * The SHA-256 Secure Hash Standard was published by NIST in 2002.
marcozecchini 0:9fca2b23d0ba 23 *
marcozecchini 0:9fca2b23d0ba 24 * http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
marcozecchini 0:9fca2b23d0ba 25 */
marcozecchini 0:9fca2b23d0ba 26
marcozecchini 0:9fca2b23d0ba 27 #if !defined(MBEDTLS_CONFIG_FILE)
marcozecchini 0:9fca2b23d0ba 28 #include "mbedtls/config.h"
marcozecchini 0:9fca2b23d0ba 29 #else
marcozecchini 0:9fca2b23d0ba 30 #include MBEDTLS_CONFIG_FILE
marcozecchini 0:9fca2b23d0ba 31 #endif
marcozecchini 0:9fca2b23d0ba 32
marcozecchini 0:9fca2b23d0ba 33 #if defined(MBEDTLS_SHA256_C)
marcozecchini 0:9fca2b23d0ba 34
marcozecchini 0:9fca2b23d0ba 35 #include "mbedtls/sha256.h"
marcozecchini 0:9fca2b23d0ba 36
marcozecchini 0:9fca2b23d0ba 37 #include <string.h>
marcozecchini 0:9fca2b23d0ba 38
marcozecchini 0:9fca2b23d0ba 39 #if defined(MBEDTLS_SELF_TEST)
marcozecchini 0:9fca2b23d0ba 40 #if defined(MBEDTLS_PLATFORM_C)
marcozecchini 0:9fca2b23d0ba 41 #include "mbedtls/platform.h"
marcozecchini 0:9fca2b23d0ba 42 #else
marcozecchini 0:9fca2b23d0ba 43 #include <stdio.h>
marcozecchini 0:9fca2b23d0ba 44 #include <stdlib.h>
marcozecchini 0:9fca2b23d0ba 45 #define mbedtls_printf printf
marcozecchini 0:9fca2b23d0ba 46 #define mbedtls_calloc calloc
marcozecchini 0:9fca2b23d0ba 47 #define mbedtls_free free
marcozecchini 0:9fca2b23d0ba 48 #endif /* MBEDTLS_PLATFORM_C */
marcozecchini 0:9fca2b23d0ba 49 #endif /* MBEDTLS_SELF_TEST */
marcozecchini 0:9fca2b23d0ba 50
marcozecchini 0:9fca2b23d0ba 51 #if !defined(MBEDTLS_SHA256_ALT)
marcozecchini 0:9fca2b23d0ba 52
marcozecchini 0:9fca2b23d0ba 53 /* Implementation that should never be optimized out by the compiler */
marcozecchini 0:9fca2b23d0ba 54 static void mbedtls_zeroize( void *v, size_t n ) {
marcozecchini 0:9fca2b23d0ba 55 volatile unsigned char *p = v; while( n-- ) *p++ = 0;
marcozecchini 0:9fca2b23d0ba 56 }
marcozecchini 0:9fca2b23d0ba 57
marcozecchini 0:9fca2b23d0ba 58 /*
marcozecchini 0:9fca2b23d0ba 59 * 32-bit integer manipulation macros (big endian)
marcozecchini 0:9fca2b23d0ba 60 */
marcozecchini 0:9fca2b23d0ba 61 #ifndef GET_UINT32_BE
marcozecchini 0:9fca2b23d0ba 62 #define GET_UINT32_BE(n,b,i) \
marcozecchini 0:9fca2b23d0ba 63 do { \
marcozecchini 0:9fca2b23d0ba 64 (n) = ( (uint32_t) (b)[(i) ] << 24 ) \
marcozecchini 0:9fca2b23d0ba 65 | ( (uint32_t) (b)[(i) + 1] << 16 ) \
marcozecchini 0:9fca2b23d0ba 66 | ( (uint32_t) (b)[(i) + 2] << 8 ) \
marcozecchini 0:9fca2b23d0ba 67 | ( (uint32_t) (b)[(i) + 3] ); \
marcozecchini 0:9fca2b23d0ba 68 } while( 0 )
marcozecchini 0:9fca2b23d0ba 69 #endif
marcozecchini 0:9fca2b23d0ba 70
marcozecchini 0:9fca2b23d0ba 71 #ifndef PUT_UINT32_BE
marcozecchini 0:9fca2b23d0ba 72 #define PUT_UINT32_BE(n,b,i) \
marcozecchini 0:9fca2b23d0ba 73 do { \
marcozecchini 0:9fca2b23d0ba 74 (b)[(i) ] = (unsigned char) ( (n) >> 24 ); \
marcozecchini 0:9fca2b23d0ba 75 (b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \
marcozecchini 0:9fca2b23d0ba 76 (b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \
marcozecchini 0:9fca2b23d0ba 77 (b)[(i) + 3] = (unsigned char) ( (n) ); \
marcozecchini 0:9fca2b23d0ba 78 } while( 0 )
marcozecchini 0:9fca2b23d0ba 79 #endif
marcozecchini 0:9fca2b23d0ba 80
marcozecchini 0:9fca2b23d0ba 81 void mbedtls_sha256_init( mbedtls_sha256_context *ctx )
marcozecchini 0:9fca2b23d0ba 82 {
marcozecchini 0:9fca2b23d0ba 83 memset( ctx, 0, sizeof( mbedtls_sha256_context ) );
marcozecchini 0:9fca2b23d0ba 84 }
marcozecchini 0:9fca2b23d0ba 85
marcozecchini 0:9fca2b23d0ba 86 void mbedtls_sha256_free( mbedtls_sha256_context *ctx )
marcozecchini 0:9fca2b23d0ba 87 {
marcozecchini 0:9fca2b23d0ba 88 if( ctx == NULL )
marcozecchini 0:9fca2b23d0ba 89 return;
marcozecchini 0:9fca2b23d0ba 90
marcozecchini 0:9fca2b23d0ba 91 mbedtls_zeroize( ctx, sizeof( mbedtls_sha256_context ) );
marcozecchini 0:9fca2b23d0ba 92 }
marcozecchini 0:9fca2b23d0ba 93
marcozecchini 0:9fca2b23d0ba 94 void mbedtls_sha256_clone( mbedtls_sha256_context *dst,
marcozecchini 0:9fca2b23d0ba 95 const mbedtls_sha256_context *src )
marcozecchini 0:9fca2b23d0ba 96 {
marcozecchini 0:9fca2b23d0ba 97 *dst = *src;
marcozecchini 0:9fca2b23d0ba 98 }
marcozecchini 0:9fca2b23d0ba 99
marcozecchini 0:9fca2b23d0ba 100 /*
marcozecchini 0:9fca2b23d0ba 101 * SHA-256 context setup
marcozecchini 0:9fca2b23d0ba 102 */
marcozecchini 0:9fca2b23d0ba 103 void mbedtls_sha256_starts( mbedtls_sha256_context *ctx, int is224 )
marcozecchini 0:9fca2b23d0ba 104 {
marcozecchini 0:9fca2b23d0ba 105 ctx->total[0] = 0;
marcozecchini 0:9fca2b23d0ba 106 ctx->total[1] = 0;
marcozecchini 0:9fca2b23d0ba 107
marcozecchini 0:9fca2b23d0ba 108 if( is224 == 0 )
marcozecchini 0:9fca2b23d0ba 109 {
marcozecchini 0:9fca2b23d0ba 110 /* SHA-256 */
marcozecchini 0:9fca2b23d0ba 111 ctx->state[0] = 0x6A09E667;
marcozecchini 0:9fca2b23d0ba 112 ctx->state[1] = 0xBB67AE85;
marcozecchini 0:9fca2b23d0ba 113 ctx->state[2] = 0x3C6EF372;
marcozecchini 0:9fca2b23d0ba 114 ctx->state[3] = 0xA54FF53A;
marcozecchini 0:9fca2b23d0ba 115 ctx->state[4] = 0x510E527F;
marcozecchini 0:9fca2b23d0ba 116 ctx->state[5] = 0x9B05688C;
marcozecchini 0:9fca2b23d0ba 117 ctx->state[6] = 0x1F83D9AB;
marcozecchini 0:9fca2b23d0ba 118 ctx->state[7] = 0x5BE0CD19;
marcozecchini 0:9fca2b23d0ba 119 }
marcozecchini 0:9fca2b23d0ba 120 else
marcozecchini 0:9fca2b23d0ba 121 {
marcozecchini 0:9fca2b23d0ba 122 /* SHA-224 */
marcozecchini 0:9fca2b23d0ba 123 ctx->state[0] = 0xC1059ED8;
marcozecchini 0:9fca2b23d0ba 124 ctx->state[1] = 0x367CD507;
marcozecchini 0:9fca2b23d0ba 125 ctx->state[2] = 0x3070DD17;
marcozecchini 0:9fca2b23d0ba 126 ctx->state[3] = 0xF70E5939;
marcozecchini 0:9fca2b23d0ba 127 ctx->state[4] = 0xFFC00B31;
marcozecchini 0:9fca2b23d0ba 128 ctx->state[5] = 0x68581511;
marcozecchini 0:9fca2b23d0ba 129 ctx->state[6] = 0x64F98FA7;
marcozecchini 0:9fca2b23d0ba 130 ctx->state[7] = 0xBEFA4FA4;
marcozecchini 0:9fca2b23d0ba 131 }
marcozecchini 0:9fca2b23d0ba 132
marcozecchini 0:9fca2b23d0ba 133 ctx->is224 = is224;
marcozecchini 0:9fca2b23d0ba 134 }
marcozecchini 0:9fca2b23d0ba 135
marcozecchini 0:9fca2b23d0ba 136 #if !defined(MBEDTLS_SHA256_PROCESS_ALT)
marcozecchini 0:9fca2b23d0ba 137 static const uint32_t K[] =
marcozecchini 0:9fca2b23d0ba 138 {
marcozecchini 0:9fca2b23d0ba 139 0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5,
marcozecchini 0:9fca2b23d0ba 140 0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5,
marcozecchini 0:9fca2b23d0ba 141 0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3,
marcozecchini 0:9fca2b23d0ba 142 0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174,
marcozecchini 0:9fca2b23d0ba 143 0xE49B69C1, 0xEFBE4786, 0x0FC19DC6, 0x240CA1CC,
marcozecchini 0:9fca2b23d0ba 144 0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA,
marcozecchini 0:9fca2b23d0ba 145 0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7,
marcozecchini 0:9fca2b23d0ba 146 0xC6E00BF3, 0xD5A79147, 0x06CA6351, 0x14292967,
marcozecchini 0:9fca2b23d0ba 147 0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13,
marcozecchini 0:9fca2b23d0ba 148 0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85,
marcozecchini 0:9fca2b23d0ba 149 0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3,
marcozecchini 0:9fca2b23d0ba 150 0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070,
marcozecchini 0:9fca2b23d0ba 151 0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5,
marcozecchini 0:9fca2b23d0ba 152 0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3,
marcozecchini 0:9fca2b23d0ba 153 0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208,
marcozecchini 0:9fca2b23d0ba 154 0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2,
marcozecchini 0:9fca2b23d0ba 155 };
marcozecchini 0:9fca2b23d0ba 156
marcozecchini 0:9fca2b23d0ba 157 #define SHR(x,n) ((x & 0xFFFFFFFF) >> n)
marcozecchini 0:9fca2b23d0ba 158 #define ROTR(x,n) (SHR(x,n) | (x << (32 - n)))
marcozecchini 0:9fca2b23d0ba 159
marcozecchini 0:9fca2b23d0ba 160 #define S0(x) (ROTR(x, 7) ^ ROTR(x,18) ^ SHR(x, 3))
marcozecchini 0:9fca2b23d0ba 161 #define S1(x) (ROTR(x,17) ^ ROTR(x,19) ^ SHR(x,10))
marcozecchini 0:9fca2b23d0ba 162
marcozecchini 0:9fca2b23d0ba 163 #define S2(x) (ROTR(x, 2) ^ ROTR(x,13) ^ ROTR(x,22))
marcozecchini 0:9fca2b23d0ba 164 #define S3(x) (ROTR(x, 6) ^ ROTR(x,11) ^ ROTR(x,25))
marcozecchini 0:9fca2b23d0ba 165
marcozecchini 0:9fca2b23d0ba 166 #define F0(x,y,z) ((x & y) | (z & (x | y)))
marcozecchini 0:9fca2b23d0ba 167 #define F1(x,y,z) (z ^ (x & (y ^ z)))
marcozecchini 0:9fca2b23d0ba 168
marcozecchini 0:9fca2b23d0ba 169 #define R(t) \
marcozecchini 0:9fca2b23d0ba 170 ( \
marcozecchini 0:9fca2b23d0ba 171 W[t] = S1(W[t - 2]) + W[t - 7] + \
marcozecchini 0:9fca2b23d0ba 172 S0(W[t - 15]) + W[t - 16] \
marcozecchini 0:9fca2b23d0ba 173 )
marcozecchini 0:9fca2b23d0ba 174
marcozecchini 0:9fca2b23d0ba 175 #define P(a,b,c,d,e,f,g,h,x,K) \
marcozecchini 0:9fca2b23d0ba 176 { \
marcozecchini 0:9fca2b23d0ba 177 temp1 = h + S3(e) + F1(e,f,g) + K + x; \
marcozecchini 0:9fca2b23d0ba 178 temp2 = S2(a) + F0(a,b,c); \
marcozecchini 0:9fca2b23d0ba 179 d += temp1; h = temp1 + temp2; \
marcozecchini 0:9fca2b23d0ba 180 }
marcozecchini 0:9fca2b23d0ba 181
marcozecchini 0:9fca2b23d0ba 182 void mbedtls_sha256_process( mbedtls_sha256_context *ctx, const unsigned char data[64] )
marcozecchini 0:9fca2b23d0ba 183 {
marcozecchini 0:9fca2b23d0ba 184 uint32_t temp1, temp2, W[64];
marcozecchini 0:9fca2b23d0ba 185 uint32_t A[8];
marcozecchini 0:9fca2b23d0ba 186 unsigned int i;
marcozecchini 0:9fca2b23d0ba 187
marcozecchini 0:9fca2b23d0ba 188 for( i = 0; i < 8; i++ )
marcozecchini 0:9fca2b23d0ba 189 A[i] = ctx->state[i];
marcozecchini 0:9fca2b23d0ba 190
marcozecchini 0:9fca2b23d0ba 191 #if defined(MBEDTLS_SHA256_SMALLER)
marcozecchini 0:9fca2b23d0ba 192 for( i = 0; i < 64; i++ )
marcozecchini 0:9fca2b23d0ba 193 {
marcozecchini 0:9fca2b23d0ba 194 if( i < 16 )
marcozecchini 0:9fca2b23d0ba 195 GET_UINT32_BE( W[i], data, 4 * i );
marcozecchini 0:9fca2b23d0ba 196 else
marcozecchini 0:9fca2b23d0ba 197 R( i );
marcozecchini 0:9fca2b23d0ba 198
marcozecchini 0:9fca2b23d0ba 199 P( A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], W[i], K[i] );
marcozecchini 0:9fca2b23d0ba 200
marcozecchini 0:9fca2b23d0ba 201 temp1 = A[7]; A[7] = A[6]; A[6] = A[5]; A[5] = A[4]; A[4] = A[3];
marcozecchini 0:9fca2b23d0ba 202 A[3] = A[2]; A[2] = A[1]; A[1] = A[0]; A[0] = temp1;
marcozecchini 0:9fca2b23d0ba 203 }
marcozecchini 0:9fca2b23d0ba 204 #else /* MBEDTLS_SHA256_SMALLER */
marcozecchini 0:9fca2b23d0ba 205 for( i = 0; i < 16; i++ )
marcozecchini 0:9fca2b23d0ba 206 GET_UINT32_BE( W[i], data, 4 * i );
marcozecchini 0:9fca2b23d0ba 207
marcozecchini 0:9fca2b23d0ba 208 for( i = 0; i < 16; i += 8 )
marcozecchini 0:9fca2b23d0ba 209 {
marcozecchini 0:9fca2b23d0ba 210 P( A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], W[i+0], K[i+0] );
marcozecchini 0:9fca2b23d0ba 211 P( A[7], A[0], A[1], A[2], A[3], A[4], A[5], A[6], W[i+1], K[i+1] );
marcozecchini 0:9fca2b23d0ba 212 P( A[6], A[7], A[0], A[1], A[2], A[3], A[4], A[5], W[i+2], K[i+2] );
marcozecchini 0:9fca2b23d0ba 213 P( A[5], A[6], A[7], A[0], A[1], A[2], A[3], A[4], W[i+3], K[i+3] );
marcozecchini 0:9fca2b23d0ba 214 P( A[4], A[5], A[6], A[7], A[0], A[1], A[2], A[3], W[i+4], K[i+4] );
marcozecchini 0:9fca2b23d0ba 215 P( A[3], A[4], A[5], A[6], A[7], A[0], A[1], A[2], W[i+5], K[i+5] );
marcozecchini 0:9fca2b23d0ba 216 P( A[2], A[3], A[4], A[5], A[6], A[7], A[0], A[1], W[i+6], K[i+6] );
marcozecchini 0:9fca2b23d0ba 217 P( A[1], A[2], A[3], A[4], A[5], A[6], A[7], A[0], W[i+7], K[i+7] );
marcozecchini 0:9fca2b23d0ba 218 }
marcozecchini 0:9fca2b23d0ba 219
marcozecchini 0:9fca2b23d0ba 220 for( i = 16; i < 64; i += 8 )
marcozecchini 0:9fca2b23d0ba 221 {
marcozecchini 0:9fca2b23d0ba 222 P( A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], R(i+0), K[i+0] );
marcozecchini 0:9fca2b23d0ba 223 P( A[7], A[0], A[1], A[2], A[3], A[4], A[5], A[6], R(i+1), K[i+1] );
marcozecchini 0:9fca2b23d0ba 224 P( A[6], A[7], A[0], A[1], A[2], A[3], A[4], A[5], R(i+2), K[i+2] );
marcozecchini 0:9fca2b23d0ba 225 P( A[5], A[6], A[7], A[0], A[1], A[2], A[3], A[4], R(i+3), K[i+3] );
marcozecchini 0:9fca2b23d0ba 226 P( A[4], A[5], A[6], A[7], A[0], A[1], A[2], A[3], R(i+4), K[i+4] );
marcozecchini 0:9fca2b23d0ba 227 P( A[3], A[4], A[5], A[6], A[7], A[0], A[1], A[2], R(i+5), K[i+5] );
marcozecchini 0:9fca2b23d0ba 228 P( A[2], A[3], A[4], A[5], A[6], A[7], A[0], A[1], R(i+6), K[i+6] );
marcozecchini 0:9fca2b23d0ba 229 P( A[1], A[2], A[3], A[4], A[5], A[6], A[7], A[0], R(i+7), K[i+7] );
marcozecchini 0:9fca2b23d0ba 230 }
marcozecchini 0:9fca2b23d0ba 231 #endif /* MBEDTLS_SHA256_SMALLER */
marcozecchini 0:9fca2b23d0ba 232
marcozecchini 0:9fca2b23d0ba 233 for( i = 0; i < 8; i++ )
marcozecchini 0:9fca2b23d0ba 234 ctx->state[i] += A[i];
marcozecchini 0:9fca2b23d0ba 235 }
marcozecchini 0:9fca2b23d0ba 236 #endif /* !MBEDTLS_SHA256_PROCESS_ALT */
marcozecchini 0:9fca2b23d0ba 237
marcozecchini 0:9fca2b23d0ba 238 /*
marcozecchini 0:9fca2b23d0ba 239 * SHA-256 process buffer
marcozecchini 0:9fca2b23d0ba 240 */
marcozecchini 0:9fca2b23d0ba 241 void mbedtls_sha256_update( mbedtls_sha256_context *ctx, const unsigned char *input,
marcozecchini 0:9fca2b23d0ba 242 size_t ilen )
marcozecchini 0:9fca2b23d0ba 243 {
marcozecchini 0:9fca2b23d0ba 244 size_t fill;
marcozecchini 0:9fca2b23d0ba 245 uint32_t left;
marcozecchini 0:9fca2b23d0ba 246
marcozecchini 0:9fca2b23d0ba 247 if( ilen == 0 )
marcozecchini 0:9fca2b23d0ba 248 return;
marcozecchini 0:9fca2b23d0ba 249
marcozecchini 0:9fca2b23d0ba 250 left = ctx->total[0] & 0x3F;
marcozecchini 0:9fca2b23d0ba 251 fill = 64 - left;
marcozecchini 0:9fca2b23d0ba 252
marcozecchini 0:9fca2b23d0ba 253 ctx->total[0] += (uint32_t) ilen;
marcozecchini 0:9fca2b23d0ba 254 ctx->total[0] &= 0xFFFFFFFF;
marcozecchini 0:9fca2b23d0ba 255
marcozecchini 0:9fca2b23d0ba 256 if( ctx->total[0] < (uint32_t) ilen )
marcozecchini 0:9fca2b23d0ba 257 ctx->total[1]++;
marcozecchini 0:9fca2b23d0ba 258
marcozecchini 0:9fca2b23d0ba 259 if( left && ilen >= fill )
marcozecchini 0:9fca2b23d0ba 260 {
marcozecchini 0:9fca2b23d0ba 261 memcpy( (void *) (ctx->buffer + left), input, fill );
marcozecchini 0:9fca2b23d0ba 262 mbedtls_sha256_process( ctx, ctx->buffer );
marcozecchini 0:9fca2b23d0ba 263 input += fill;
marcozecchini 0:9fca2b23d0ba 264 ilen -= fill;
marcozecchini 0:9fca2b23d0ba 265 left = 0;
marcozecchini 0:9fca2b23d0ba 266 }
marcozecchini 0:9fca2b23d0ba 267
marcozecchini 0:9fca2b23d0ba 268 while( ilen >= 64 )
marcozecchini 0:9fca2b23d0ba 269 {
marcozecchini 0:9fca2b23d0ba 270 mbedtls_sha256_process( ctx, input );
marcozecchini 0:9fca2b23d0ba 271 input += 64;
marcozecchini 0:9fca2b23d0ba 272 ilen -= 64;
marcozecchini 0:9fca2b23d0ba 273 }
marcozecchini 0:9fca2b23d0ba 274
marcozecchini 0:9fca2b23d0ba 275 if( ilen > 0 )
marcozecchini 0:9fca2b23d0ba 276 memcpy( (void *) (ctx->buffer + left), input, ilen );
marcozecchini 0:9fca2b23d0ba 277 }
marcozecchini 0:9fca2b23d0ba 278
marcozecchini 0:9fca2b23d0ba 279 static const unsigned char sha256_padding[64] =
marcozecchini 0:9fca2b23d0ba 280 {
marcozecchini 0:9fca2b23d0ba 281 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
marcozecchini 0:9fca2b23d0ba 282 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
marcozecchini 0:9fca2b23d0ba 283 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
marcozecchini 0:9fca2b23d0ba 284 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
marcozecchini 0:9fca2b23d0ba 285 };
marcozecchini 0:9fca2b23d0ba 286
marcozecchini 0:9fca2b23d0ba 287 /*
marcozecchini 0:9fca2b23d0ba 288 * SHA-256 final digest
marcozecchini 0:9fca2b23d0ba 289 */
marcozecchini 0:9fca2b23d0ba 290 void mbedtls_sha256_finish( mbedtls_sha256_context *ctx, unsigned char output[32] )
marcozecchini 0:9fca2b23d0ba 291 {
marcozecchini 0:9fca2b23d0ba 292 uint32_t last, padn;
marcozecchini 0:9fca2b23d0ba 293 uint32_t high, low;
marcozecchini 0:9fca2b23d0ba 294 unsigned char msglen[8];
marcozecchini 0:9fca2b23d0ba 295
marcozecchini 0:9fca2b23d0ba 296 high = ( ctx->total[0] >> 29 )
marcozecchini 0:9fca2b23d0ba 297 | ( ctx->total[1] << 3 );
marcozecchini 0:9fca2b23d0ba 298 low = ( ctx->total[0] << 3 );
marcozecchini 0:9fca2b23d0ba 299
marcozecchini 0:9fca2b23d0ba 300 PUT_UINT32_BE( high, msglen, 0 );
marcozecchini 0:9fca2b23d0ba 301 PUT_UINT32_BE( low, msglen, 4 );
marcozecchini 0:9fca2b23d0ba 302
marcozecchini 0:9fca2b23d0ba 303 last = ctx->total[0] & 0x3F;
marcozecchini 0:9fca2b23d0ba 304 padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );
marcozecchini 0:9fca2b23d0ba 305
marcozecchini 0:9fca2b23d0ba 306 mbedtls_sha256_update( ctx, sha256_padding, padn );
marcozecchini 0:9fca2b23d0ba 307 mbedtls_sha256_update( ctx, msglen, 8 );
marcozecchini 0:9fca2b23d0ba 308
marcozecchini 0:9fca2b23d0ba 309 PUT_UINT32_BE( ctx->state[0], output, 0 );
marcozecchini 0:9fca2b23d0ba 310 PUT_UINT32_BE( ctx->state[1], output, 4 );
marcozecchini 0:9fca2b23d0ba 311 PUT_UINT32_BE( ctx->state[2], output, 8 );
marcozecchini 0:9fca2b23d0ba 312 PUT_UINT32_BE( ctx->state[3], output, 12 );
marcozecchini 0:9fca2b23d0ba 313 PUT_UINT32_BE( ctx->state[4], output, 16 );
marcozecchini 0:9fca2b23d0ba 314 PUT_UINT32_BE( ctx->state[5], output, 20 );
marcozecchini 0:9fca2b23d0ba 315 PUT_UINT32_BE( ctx->state[6], output, 24 );
marcozecchini 0:9fca2b23d0ba 316
marcozecchini 0:9fca2b23d0ba 317 if( ctx->is224 == 0 )
marcozecchini 0:9fca2b23d0ba 318 PUT_UINT32_BE( ctx->state[7], output, 28 );
marcozecchini 0:9fca2b23d0ba 319 }
marcozecchini 0:9fca2b23d0ba 320
marcozecchini 0:9fca2b23d0ba 321 #endif /* !MBEDTLS_SHA256_ALT */
marcozecchini 0:9fca2b23d0ba 322
marcozecchini 0:9fca2b23d0ba 323 /*
marcozecchini 0:9fca2b23d0ba 324 * output = SHA-256( input buffer )
marcozecchini 0:9fca2b23d0ba 325 */
marcozecchini 0:9fca2b23d0ba 326 void mbedtls_sha256( const unsigned char *input, size_t ilen,
marcozecchini 0:9fca2b23d0ba 327 unsigned char output[32], int is224 )
marcozecchini 0:9fca2b23d0ba 328 {
marcozecchini 0:9fca2b23d0ba 329 mbedtls_sha256_context ctx;
marcozecchini 0:9fca2b23d0ba 330
marcozecchini 0:9fca2b23d0ba 331 mbedtls_sha256_init( &ctx );
marcozecchini 0:9fca2b23d0ba 332 mbedtls_sha256_starts( &ctx, is224 );
marcozecchini 0:9fca2b23d0ba 333 mbedtls_sha256_update( &ctx, input, ilen );
marcozecchini 0:9fca2b23d0ba 334 mbedtls_sha256_finish( &ctx, output );
marcozecchini 0:9fca2b23d0ba 335 mbedtls_sha256_free( &ctx );
marcozecchini 0:9fca2b23d0ba 336 }
marcozecchini 0:9fca2b23d0ba 337
marcozecchini 0:9fca2b23d0ba 338 #if defined(MBEDTLS_SELF_TEST)
marcozecchini 0:9fca2b23d0ba 339 /*
marcozecchini 0:9fca2b23d0ba 340 * FIPS-180-2 test vectors
marcozecchini 0:9fca2b23d0ba 341 */
marcozecchini 0:9fca2b23d0ba 342 static const unsigned char sha256_test_buf[3][57] =
marcozecchini 0:9fca2b23d0ba 343 {
marcozecchini 0:9fca2b23d0ba 344 { "abc" },
marcozecchini 0:9fca2b23d0ba 345 { "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" },
marcozecchini 0:9fca2b23d0ba 346 { "" }
marcozecchini 0:9fca2b23d0ba 347 };
marcozecchini 0:9fca2b23d0ba 348
marcozecchini 0:9fca2b23d0ba 349 static const int sha256_test_buflen[3] =
marcozecchini 0:9fca2b23d0ba 350 {
marcozecchini 0:9fca2b23d0ba 351 3, 56, 1000
marcozecchini 0:9fca2b23d0ba 352 };
marcozecchini 0:9fca2b23d0ba 353
marcozecchini 0:9fca2b23d0ba 354 static const unsigned char sha256_test_sum[6][32] =
marcozecchini 0:9fca2b23d0ba 355 {
marcozecchini 0:9fca2b23d0ba 356 /*
marcozecchini 0:9fca2b23d0ba 357 * SHA-224 test vectors
marcozecchini 0:9fca2b23d0ba 358 */
marcozecchini 0:9fca2b23d0ba 359 { 0x23, 0x09, 0x7D, 0x22, 0x34, 0x05, 0xD8, 0x22,
marcozecchini 0:9fca2b23d0ba 360 0x86, 0x42, 0xA4, 0x77, 0xBD, 0xA2, 0x55, 0xB3,
marcozecchini 0:9fca2b23d0ba 361 0x2A, 0xAD, 0xBC, 0xE4, 0xBD, 0xA0, 0xB3, 0xF7,
marcozecchini 0:9fca2b23d0ba 362 0xE3, 0x6C, 0x9D, 0xA7 },
marcozecchini 0:9fca2b23d0ba 363 { 0x75, 0x38, 0x8B, 0x16, 0x51, 0x27, 0x76, 0xCC,
marcozecchini 0:9fca2b23d0ba 364 0x5D, 0xBA, 0x5D, 0xA1, 0xFD, 0x89, 0x01, 0x50,
marcozecchini 0:9fca2b23d0ba 365 0xB0, 0xC6, 0x45, 0x5C, 0xB4, 0xF5, 0x8B, 0x19,
marcozecchini 0:9fca2b23d0ba 366 0x52, 0x52, 0x25, 0x25 },
marcozecchini 0:9fca2b23d0ba 367 { 0x20, 0x79, 0x46, 0x55, 0x98, 0x0C, 0x91, 0xD8,
marcozecchini 0:9fca2b23d0ba 368 0xBB, 0xB4, 0xC1, 0xEA, 0x97, 0x61, 0x8A, 0x4B,
marcozecchini 0:9fca2b23d0ba 369 0xF0, 0x3F, 0x42, 0x58, 0x19, 0x48, 0xB2, 0xEE,
marcozecchini 0:9fca2b23d0ba 370 0x4E, 0xE7, 0xAD, 0x67 },
marcozecchini 0:9fca2b23d0ba 371
marcozecchini 0:9fca2b23d0ba 372 /*
marcozecchini 0:9fca2b23d0ba 373 * SHA-256 test vectors
marcozecchini 0:9fca2b23d0ba 374 */
marcozecchini 0:9fca2b23d0ba 375 { 0xBA, 0x78, 0x16, 0xBF, 0x8F, 0x01, 0xCF, 0xEA,
marcozecchini 0:9fca2b23d0ba 376 0x41, 0x41, 0x40, 0xDE, 0x5D, 0xAE, 0x22, 0x23,
marcozecchini 0:9fca2b23d0ba 377 0xB0, 0x03, 0x61, 0xA3, 0x96, 0x17, 0x7A, 0x9C,
marcozecchini 0:9fca2b23d0ba 378 0xB4, 0x10, 0xFF, 0x61, 0xF2, 0x00, 0x15, 0xAD },
marcozecchini 0:9fca2b23d0ba 379 { 0x24, 0x8D, 0x6A, 0x61, 0xD2, 0x06, 0x38, 0xB8,
marcozecchini 0:9fca2b23d0ba 380 0xE5, 0xC0, 0x26, 0x93, 0x0C, 0x3E, 0x60, 0x39,
marcozecchini 0:9fca2b23d0ba 381 0xA3, 0x3C, 0xE4, 0x59, 0x64, 0xFF, 0x21, 0x67,
marcozecchini 0:9fca2b23d0ba 382 0xF6, 0xEC, 0xED, 0xD4, 0x19, 0xDB, 0x06, 0xC1 },
marcozecchini 0:9fca2b23d0ba 383 { 0xCD, 0xC7, 0x6E, 0x5C, 0x99, 0x14, 0xFB, 0x92,
marcozecchini 0:9fca2b23d0ba 384 0x81, 0xA1, 0xC7, 0xE2, 0x84, 0xD7, 0x3E, 0x67,
marcozecchini 0:9fca2b23d0ba 385 0xF1, 0x80, 0x9A, 0x48, 0xA4, 0x97, 0x20, 0x0E,
marcozecchini 0:9fca2b23d0ba 386 0x04, 0x6D, 0x39, 0xCC, 0xC7, 0x11, 0x2C, 0xD0 }
marcozecchini 0:9fca2b23d0ba 387 };
marcozecchini 0:9fca2b23d0ba 388
marcozecchini 0:9fca2b23d0ba 389 /*
marcozecchini 0:9fca2b23d0ba 390 * Checkup routine
marcozecchini 0:9fca2b23d0ba 391 */
marcozecchini 0:9fca2b23d0ba 392 int mbedtls_sha256_self_test( int verbose )
marcozecchini 0:9fca2b23d0ba 393 {
marcozecchini 0:9fca2b23d0ba 394 int i, j, k, buflen, ret = 0;
marcozecchini 0:9fca2b23d0ba 395 unsigned char *buf;
marcozecchini 0:9fca2b23d0ba 396 unsigned char sha256sum[32];
marcozecchini 0:9fca2b23d0ba 397 mbedtls_sha256_context ctx;
marcozecchini 0:9fca2b23d0ba 398
marcozecchini 0:9fca2b23d0ba 399 buf = mbedtls_calloc( 1024, sizeof(unsigned char) );
marcozecchini 0:9fca2b23d0ba 400 if( NULL == buf )
marcozecchini 0:9fca2b23d0ba 401 {
marcozecchini 0:9fca2b23d0ba 402 if( verbose != 0 )
marcozecchini 0:9fca2b23d0ba 403 mbedtls_printf( "Buffer allocation failed\n" );
marcozecchini 0:9fca2b23d0ba 404
marcozecchini 0:9fca2b23d0ba 405 return( 1 );
marcozecchini 0:9fca2b23d0ba 406 }
marcozecchini 0:9fca2b23d0ba 407
marcozecchini 0:9fca2b23d0ba 408 mbedtls_sha256_init( &ctx );
marcozecchini 0:9fca2b23d0ba 409
marcozecchini 0:9fca2b23d0ba 410 for( i = 0; i < 6; i++ )
marcozecchini 0:9fca2b23d0ba 411 {
marcozecchini 0:9fca2b23d0ba 412 j = i % 3;
marcozecchini 0:9fca2b23d0ba 413 k = i < 3;
marcozecchini 0:9fca2b23d0ba 414
marcozecchini 0:9fca2b23d0ba 415 if( verbose != 0 )
marcozecchini 0:9fca2b23d0ba 416 mbedtls_printf( " SHA-%d test #%d: ", 256 - k * 32, j + 1 );
marcozecchini 0:9fca2b23d0ba 417
marcozecchini 0:9fca2b23d0ba 418 mbedtls_sha256_starts( &ctx, k );
marcozecchini 0:9fca2b23d0ba 419
marcozecchini 0:9fca2b23d0ba 420 if( j == 2 )
marcozecchini 0:9fca2b23d0ba 421 {
marcozecchini 0:9fca2b23d0ba 422 memset( buf, 'a', buflen = 1000 );
marcozecchini 0:9fca2b23d0ba 423
marcozecchini 0:9fca2b23d0ba 424 for( j = 0; j < 1000; j++ )
marcozecchini 0:9fca2b23d0ba 425 mbedtls_sha256_update( &ctx, buf, buflen );
marcozecchini 0:9fca2b23d0ba 426 }
marcozecchini 0:9fca2b23d0ba 427 else
marcozecchini 0:9fca2b23d0ba 428 mbedtls_sha256_update( &ctx, sha256_test_buf[j],
marcozecchini 0:9fca2b23d0ba 429 sha256_test_buflen[j] );
marcozecchini 0:9fca2b23d0ba 430
marcozecchini 0:9fca2b23d0ba 431 mbedtls_sha256_finish( &ctx, sha256sum );
marcozecchini 0:9fca2b23d0ba 432
marcozecchini 0:9fca2b23d0ba 433 if( memcmp( sha256sum, sha256_test_sum[i], 32 - k * 4 ) != 0 )
marcozecchini 0:9fca2b23d0ba 434 {
marcozecchini 0:9fca2b23d0ba 435 if( verbose != 0 )
marcozecchini 0:9fca2b23d0ba 436 mbedtls_printf( "failed\n" );
marcozecchini 0:9fca2b23d0ba 437
marcozecchini 0:9fca2b23d0ba 438 ret = 1;
marcozecchini 0:9fca2b23d0ba 439 goto exit;
marcozecchini 0:9fca2b23d0ba 440 }
marcozecchini 0:9fca2b23d0ba 441
marcozecchini 0:9fca2b23d0ba 442 if( verbose != 0 )
marcozecchini 0:9fca2b23d0ba 443 mbedtls_printf( "passed\n" );
marcozecchini 0:9fca2b23d0ba 444 }
marcozecchini 0:9fca2b23d0ba 445
marcozecchini 0:9fca2b23d0ba 446 if( verbose != 0 )
marcozecchini 0:9fca2b23d0ba 447 mbedtls_printf( "\n" );
marcozecchini 0:9fca2b23d0ba 448
marcozecchini 0:9fca2b23d0ba 449 exit:
marcozecchini 0:9fca2b23d0ba 450 mbedtls_sha256_free( &ctx );
marcozecchini 0:9fca2b23d0ba 451 mbedtls_free( buf );
marcozecchini 0:9fca2b23d0ba 452
marcozecchini 0:9fca2b23d0ba 453 return( ret );
marcozecchini 0:9fca2b23d0ba 454 }
marcozecchini 0:9fca2b23d0ba 455
marcozecchini 0:9fca2b23d0ba 456 #endif /* MBEDTLS_SELF_TEST */
marcozecchini 0:9fca2b23d0ba 457
marcozecchini 0:9fca2b23d0ba 458 #endif /* MBEDTLS_SHA256_C */