Austin Blackstone / Mbed 2 deprecated mbed-client-classic-example-lwip

mbed client on ethernet with LWIP

Dependencies:   mbed Socket lwip-eth lwip-sys lwip

Fork of mbed-client-classic-example-lwip by sandbox

mbedtls/source/sha256.c@11:cada08fc8a70, 2016-06-09 (annotated)

Committer:
mbedAustin
Date:
Thu Jun 09 17:08:36 2016 +0000
Revision:
11:cada08fc8a70
Commit for public Consumption

Who changed what in which revision?

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mbedAustin 11:cada08fc8a70 1 /*
mbedAustin 11:cada08fc8a70 2 * FIPS-180-2 compliant SHA-256 implementation
mbedAustin 11:cada08fc8a70 3 *
mbedAustin 11:cada08fc8a70 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
mbedAustin 11:cada08fc8a70 5 * SPDX-License-Identifier: Apache-2.0
mbedAustin 11:cada08fc8a70 6 *
mbedAustin 11:cada08fc8a70 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
mbedAustin 11:cada08fc8a70 8 * not use this file except in compliance with the License.
mbedAustin 11:cada08fc8a70 9 * You may obtain a copy of the License at
mbedAustin 11:cada08fc8a70 10 *
mbedAustin 11:cada08fc8a70 11 * http://www.apache.org/licenses/LICENSE-2.0
mbedAustin 11:cada08fc8a70 12 *
mbedAustin 11:cada08fc8a70 13 * Unless required by applicable law or agreed to in writing, software
mbedAustin 11:cada08fc8a70 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
mbedAustin 11:cada08fc8a70 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbedAustin 11:cada08fc8a70 16 * See the License for the specific language governing permissions and
mbedAustin 11:cada08fc8a70 17 * limitations under the License.
mbedAustin 11:cada08fc8a70 18 *
mbedAustin 11:cada08fc8a70 19 * This file is part of mbed TLS (https://tls.mbed.org)
mbedAustin 11:cada08fc8a70 20 */
mbedAustin 11:cada08fc8a70 21 /*
mbedAustin 11:cada08fc8a70 22 * The SHA-256 Secure Hash Standard was published by NIST in 2002.
mbedAustin 11:cada08fc8a70 23 *
mbedAustin 11:cada08fc8a70 24 * http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
mbedAustin 11:cada08fc8a70 25 */
mbedAustin 11:cada08fc8a70 26
mbedAustin 11:cada08fc8a70 27 #if !defined(MBEDTLS_CONFIG_FILE)
mbedAustin 11:cada08fc8a70 28 #include "mbedtls/config.h"
mbedAustin 11:cada08fc8a70 29 #else
mbedAustin 11:cada08fc8a70 30 #include MBEDTLS_CONFIG_FILE
mbedAustin 11:cada08fc8a70 31 #endif
mbedAustin 11:cada08fc8a70 32
mbedAustin 11:cada08fc8a70 33 #if defined(MBEDTLS_SHA256_C)
mbedAustin 11:cada08fc8a70 34
mbedAustin 11:cada08fc8a70 35 #include "mbedtls/sha256.h"
mbedAustin 11:cada08fc8a70 36
mbedAustin 11:cada08fc8a70 37 #include <string.h>
mbedAustin 11:cada08fc8a70 38
mbedAustin 11:cada08fc8a70 39 #if defined(MBEDTLS_SELF_TEST)
mbedAustin 11:cada08fc8a70 40 #if defined(MBEDTLS_PLATFORM_C)
mbedAustin 11:cada08fc8a70 41 #include "mbedtls/platform.h"
mbedAustin 11:cada08fc8a70 42 #else
mbedAustin 11:cada08fc8a70 43 #include <stdio.h>
mbedAustin 11:cada08fc8a70 44 #define mbedtls_printf printf
mbedAustin 11:cada08fc8a70 45 #endif /* MBEDTLS_PLATFORM_C */
mbedAustin 11:cada08fc8a70 46 #endif /* MBEDTLS_SELF_TEST */
mbedAustin 11:cada08fc8a70 47
mbedAustin 11:cada08fc8a70 48 #if !defined(MBEDTLS_SHA256_ALT)
mbedAustin 11:cada08fc8a70 49
mbedAustin 11:cada08fc8a70 50 /* Implementation that should never be optimized out by the compiler */
mbedAustin 11:cada08fc8a70 51 static void mbedtls_zeroize( void *v, size_t n ) {
mbedAustin 11:cada08fc8a70 52 volatile unsigned char *p = v; while( n-- ) *p++ = 0;
mbedAustin 11:cada08fc8a70 53 }
mbedAustin 11:cada08fc8a70 54
mbedAustin 11:cada08fc8a70 55 /*
mbedAustin 11:cada08fc8a70 56 * 32-bit integer manipulation macros (big endian)
mbedAustin 11:cada08fc8a70 57 */
mbedAustin 11:cada08fc8a70 58 #ifndef GET_UINT32_BE
mbedAustin 11:cada08fc8a70 59 #define GET_UINT32_BE(n,b,i) \
mbedAustin 11:cada08fc8a70 60 do { \
mbedAustin 11:cada08fc8a70 61 (n) = ( (uint32_t) (b)[(i) ] << 24 ) \
mbedAustin 11:cada08fc8a70 62 | ( (uint32_t) (b)[(i) + 1] << 16 ) \
mbedAustin 11:cada08fc8a70 63 | ( (uint32_t) (b)[(i) + 2] << 8 ) \
mbedAustin 11:cada08fc8a70 64 | ( (uint32_t) (b)[(i) + 3] ); \
mbedAustin 11:cada08fc8a70 65 } while( 0 )
mbedAustin 11:cada08fc8a70 66 #endif
mbedAustin 11:cada08fc8a70 67
mbedAustin 11:cada08fc8a70 68 #ifndef PUT_UINT32_BE
mbedAustin 11:cada08fc8a70 69 #define PUT_UINT32_BE(n,b,i) \
mbedAustin 11:cada08fc8a70 70 do { \
mbedAustin 11:cada08fc8a70 71 (b)[(i) ] = (unsigned char) ( (n) >> 24 ); \
mbedAustin 11:cada08fc8a70 72 (b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \
mbedAustin 11:cada08fc8a70 73 (b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \
mbedAustin 11:cada08fc8a70 74 (b)[(i) + 3] = (unsigned char) ( (n) ); \
mbedAustin 11:cada08fc8a70 75 } while( 0 )
mbedAustin 11:cada08fc8a70 76 #endif
mbedAustin 11:cada08fc8a70 77
mbedAustin 11:cada08fc8a70 78 void mbedtls_sha256_init( mbedtls_sha256_context *ctx )
mbedAustin 11:cada08fc8a70 79 {
mbedAustin 11:cada08fc8a70 80 memset( ctx, 0, sizeof( mbedtls_sha256_context ) );
mbedAustin 11:cada08fc8a70 81 }
mbedAustin 11:cada08fc8a70 82
mbedAustin 11:cada08fc8a70 83 void mbedtls_sha256_free( mbedtls_sha256_context *ctx )
mbedAustin 11:cada08fc8a70 84 {
mbedAustin 11:cada08fc8a70 85 if( ctx == NULL )
mbedAustin 11:cada08fc8a70 86 return;
mbedAustin 11:cada08fc8a70 87
mbedAustin 11:cada08fc8a70 88 mbedtls_zeroize( ctx, sizeof( mbedtls_sha256_context ) );
mbedAustin 11:cada08fc8a70 89 }
mbedAustin 11:cada08fc8a70 90
mbedAustin 11:cada08fc8a70 91 void mbedtls_sha256_clone( mbedtls_sha256_context *dst,
mbedAustin 11:cada08fc8a70 92 const mbedtls_sha256_context *src )
mbedAustin 11:cada08fc8a70 93 {
mbedAustin 11:cada08fc8a70 94 *dst = *src;
mbedAustin 11:cada08fc8a70 95 }
mbedAustin 11:cada08fc8a70 96
mbedAustin 11:cada08fc8a70 97 /*
mbedAustin 11:cada08fc8a70 98 * SHA-256 context setup
mbedAustin 11:cada08fc8a70 99 */
mbedAustin 11:cada08fc8a70 100 void mbedtls_sha256_starts( mbedtls_sha256_context *ctx, int is224 )
mbedAustin 11:cada08fc8a70 101 {
mbedAustin 11:cada08fc8a70 102 ctx->total[0] = 0;
mbedAustin 11:cada08fc8a70 103 ctx->total[1] = 0;
mbedAustin 11:cada08fc8a70 104
mbedAustin 11:cada08fc8a70 105 if( is224 == 0 )
mbedAustin 11:cada08fc8a70 106 {
mbedAustin 11:cada08fc8a70 107 /* SHA-256 */
mbedAustin 11:cada08fc8a70 108 ctx->state[0] = 0x6A09E667;
mbedAustin 11:cada08fc8a70 109 ctx->state[1] = 0xBB67AE85;
mbedAustin 11:cada08fc8a70 110 ctx->state[2] = 0x3C6EF372;
mbedAustin 11:cada08fc8a70 111 ctx->state[3] = 0xA54FF53A;
mbedAustin 11:cada08fc8a70 112 ctx->state[4] = 0x510E527F;
mbedAustin 11:cada08fc8a70 113 ctx->state[5] = 0x9B05688C;
mbedAustin 11:cada08fc8a70 114 ctx->state[6] = 0x1F83D9AB;
mbedAustin 11:cada08fc8a70 115 ctx->state[7] = 0x5BE0CD19;
mbedAustin 11:cada08fc8a70 116 }
mbedAustin 11:cada08fc8a70 117 else
mbedAustin 11:cada08fc8a70 118 {
mbedAustin 11:cada08fc8a70 119 /* SHA-224 */
mbedAustin 11:cada08fc8a70 120 ctx->state[0] = 0xC1059ED8;
mbedAustin 11:cada08fc8a70 121 ctx->state[1] = 0x367CD507;
mbedAustin 11:cada08fc8a70 122 ctx->state[2] = 0x3070DD17;
mbedAustin 11:cada08fc8a70 123 ctx->state[3] = 0xF70E5939;
mbedAustin 11:cada08fc8a70 124 ctx->state[4] = 0xFFC00B31;
mbedAustin 11:cada08fc8a70 125 ctx->state[5] = 0x68581511;
mbedAustin 11:cada08fc8a70 126 ctx->state[6] = 0x64F98FA7;
mbedAustin 11:cada08fc8a70 127 ctx->state[7] = 0xBEFA4FA4;
mbedAustin 11:cada08fc8a70 128 }
mbedAustin 11:cada08fc8a70 129
mbedAustin 11:cada08fc8a70 130 ctx->is224 = is224;
mbedAustin 11:cada08fc8a70 131 }
mbedAustin 11:cada08fc8a70 132
mbedAustin 11:cada08fc8a70 133 #if !defined(MBEDTLS_SHA256_PROCESS_ALT)
mbedAustin 11:cada08fc8a70 134 static const uint32_t K[] =
mbedAustin 11:cada08fc8a70 135 {
mbedAustin 11:cada08fc8a70 136 0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5,
mbedAustin 11:cada08fc8a70 137 0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5,
mbedAustin 11:cada08fc8a70 138 0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3,
mbedAustin 11:cada08fc8a70 139 0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174,
mbedAustin 11:cada08fc8a70 140 0xE49B69C1, 0xEFBE4786, 0x0FC19DC6, 0x240CA1CC,
mbedAustin 11:cada08fc8a70 141 0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA,
mbedAustin 11:cada08fc8a70 142 0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7,
mbedAustin 11:cada08fc8a70 143 0xC6E00BF3, 0xD5A79147, 0x06CA6351, 0x14292967,
mbedAustin 11:cada08fc8a70 144 0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13,
mbedAustin 11:cada08fc8a70 145 0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85,
mbedAustin 11:cada08fc8a70 146 0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3,
mbedAustin 11:cada08fc8a70 147 0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070,
mbedAustin 11:cada08fc8a70 148 0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5,
mbedAustin 11:cada08fc8a70 149 0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3,
mbedAustin 11:cada08fc8a70 150 0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208,
mbedAustin 11:cada08fc8a70 151 0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2,
mbedAustin 11:cada08fc8a70 152 };
mbedAustin 11:cada08fc8a70 153
mbedAustin 11:cada08fc8a70 154 #define SHR(x,n) ((x & 0xFFFFFFFF) >> n)
mbedAustin 11:cada08fc8a70 155 #define ROTR(x,n) (SHR(x,n) | (x << (32 - n)))
mbedAustin 11:cada08fc8a70 156
mbedAustin 11:cada08fc8a70 157 #define S0(x) (ROTR(x, 7) ^ ROTR(x,18) ^ SHR(x, 3))
mbedAustin 11:cada08fc8a70 158 #define S1(x) (ROTR(x,17) ^ ROTR(x,19) ^ SHR(x,10))
mbedAustin 11:cada08fc8a70 159
mbedAustin 11:cada08fc8a70 160 #define S2(x) (ROTR(x, 2) ^ ROTR(x,13) ^ ROTR(x,22))
mbedAustin 11:cada08fc8a70 161 #define S3(x) (ROTR(x, 6) ^ ROTR(x,11) ^ ROTR(x,25))
mbedAustin 11:cada08fc8a70 162
mbedAustin 11:cada08fc8a70 163 #define F0(x,y,z) ((x & y) | (z & (x | y)))
mbedAustin 11:cada08fc8a70 164 #define F1(x,y,z) (z ^ (x & (y ^ z)))
mbedAustin 11:cada08fc8a70 165
mbedAustin 11:cada08fc8a70 166 #define R(t) \
mbedAustin 11:cada08fc8a70 167 ( \
mbedAustin 11:cada08fc8a70 168 W[t] = S1(W[t - 2]) + W[t - 7] + \
mbedAustin 11:cada08fc8a70 169 S0(W[t - 15]) + W[t - 16] \
mbedAustin 11:cada08fc8a70 170 )
mbedAustin 11:cada08fc8a70 171
mbedAustin 11:cada08fc8a70 172 #define P(a,b,c,d,e,f,g,h,x,K) \
mbedAustin 11:cada08fc8a70 173 { \
mbedAustin 11:cada08fc8a70 174 temp1 = h + S3(e) + F1(e,f,g) + K + x; \
mbedAustin 11:cada08fc8a70 175 temp2 = S2(a) + F0(a,b,c); \
mbedAustin 11:cada08fc8a70 176 d += temp1; h = temp1 + temp2; \
mbedAustin 11:cada08fc8a70 177 }
mbedAustin 11:cada08fc8a70 178
mbedAustin 11:cada08fc8a70 179 void mbedtls_sha256_process( mbedtls_sha256_context *ctx, const unsigned char data[64] )
mbedAustin 11:cada08fc8a70 180 {
mbedAustin 11:cada08fc8a70 181 uint32_t temp1, temp2, W[64];
mbedAustin 11:cada08fc8a70 182 uint32_t A[8];
mbedAustin 11:cada08fc8a70 183 unsigned int i;
mbedAustin 11:cada08fc8a70 184
mbedAustin 11:cada08fc8a70 185 for( i = 0; i < 8; i++ )
mbedAustin 11:cada08fc8a70 186 A[i] = ctx->state[i];
mbedAustin 11:cada08fc8a70 187
mbedAustin 11:cada08fc8a70 188 #if defined(MBEDTLS_SHA256_SMALLER)
mbedAustin 11:cada08fc8a70 189 for( i = 0; i < 64; i++ )
mbedAustin 11:cada08fc8a70 190 {
mbedAustin 11:cada08fc8a70 191 if( i < 16 )
mbedAustin 11:cada08fc8a70 192 GET_UINT32_BE( W[i], data, 4 * i );
mbedAustin 11:cada08fc8a70 193 else
mbedAustin 11:cada08fc8a70 194 R( i );
mbedAustin 11:cada08fc8a70 195
mbedAustin 11:cada08fc8a70 196 P( A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], W[i], K[i] );
mbedAustin 11:cada08fc8a70 197
mbedAustin 11:cada08fc8a70 198 temp1 = A[7]; A[7] = A[6]; A[6] = A[5]; A[5] = A[4]; A[4] = A[3];
mbedAustin 11:cada08fc8a70 199 A[3] = A[2]; A[2] = A[1]; A[1] = A[0]; A[0] = temp1;
mbedAustin 11:cada08fc8a70 200 }
mbedAustin 11:cada08fc8a70 201 #else /* MBEDTLS_SHA256_SMALLER */
mbedAustin 11:cada08fc8a70 202 for( i = 0; i < 16; i++ )
mbedAustin 11:cada08fc8a70 203 GET_UINT32_BE( W[i], data, 4 * i );
mbedAustin 11:cada08fc8a70 204
mbedAustin 11:cada08fc8a70 205 for( i = 0; i < 16; i += 8 )
mbedAustin 11:cada08fc8a70 206 {
mbedAustin 11:cada08fc8a70 207 P( A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], W[i+0], K[i+0] );
mbedAustin 11:cada08fc8a70 208 P( A[7], A[0], A[1], A[2], A[3], A[4], A[5], A[6], W[i+1], K[i+1] );
mbedAustin 11:cada08fc8a70 209 P( A[6], A[7], A[0], A[1], A[2], A[3], A[4], A[5], W[i+2], K[i+2] );
mbedAustin 11:cada08fc8a70 210 P( A[5], A[6], A[7], A[0], A[1], A[2], A[3], A[4], W[i+3], K[i+3] );
mbedAustin 11:cada08fc8a70 211 P( A[4], A[5], A[6], A[7], A[0], A[1], A[2], A[3], W[i+4], K[i+4] );
mbedAustin 11:cada08fc8a70 212 P( A[3], A[4], A[5], A[6], A[7], A[0], A[1], A[2], W[i+5], K[i+5] );
mbedAustin 11:cada08fc8a70 213 P( A[2], A[3], A[4], A[5], A[6], A[7], A[0], A[1], W[i+6], K[i+6] );
mbedAustin 11:cada08fc8a70 214 P( A[1], A[2], A[3], A[4], A[5], A[6], A[7], A[0], W[i+7], K[i+7] );
mbedAustin 11:cada08fc8a70 215 }
mbedAustin 11:cada08fc8a70 216
mbedAustin 11:cada08fc8a70 217 for( i = 16; i < 64; i += 8 )
mbedAustin 11:cada08fc8a70 218 {
mbedAustin 11:cada08fc8a70 219 P( A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], R(i+0), K[i+0] );
mbedAustin 11:cada08fc8a70 220 P( A[7], A[0], A[1], A[2], A[3], A[4], A[5], A[6], R(i+1), K[i+1] );
mbedAustin 11:cada08fc8a70 221 P( A[6], A[7], A[0], A[1], A[2], A[3], A[4], A[5], R(i+2), K[i+2] );
mbedAustin 11:cada08fc8a70 222 P( A[5], A[6], A[7], A[0], A[1], A[2], A[3], A[4], R(i+3), K[i+3] );
mbedAustin 11:cada08fc8a70 223 P( A[4], A[5], A[6], A[7], A[0], A[1], A[2], A[3], R(i+4), K[i+4] );
mbedAustin 11:cada08fc8a70 224 P( A[3], A[4], A[5], A[6], A[7], A[0], A[1], A[2], R(i+5), K[i+5] );
mbedAustin 11:cada08fc8a70 225 P( A[2], A[3], A[4], A[5], A[6], A[7], A[0], A[1], R(i+6), K[i+6] );
mbedAustin 11:cada08fc8a70 226 P( A[1], A[2], A[3], A[4], A[5], A[6], A[7], A[0], R(i+7), K[i+7] );
mbedAustin 11:cada08fc8a70 227 }
mbedAustin 11:cada08fc8a70 228 #endif /* MBEDTLS_SHA256_SMALLER */
mbedAustin 11:cada08fc8a70 229
mbedAustin 11:cada08fc8a70 230 for( i = 0; i < 8; i++ )
mbedAustin 11:cada08fc8a70 231 ctx->state[i] += A[i];
mbedAustin 11:cada08fc8a70 232 }
mbedAustin 11:cada08fc8a70 233 #endif /* !MBEDTLS_SHA256_PROCESS_ALT */
mbedAustin 11:cada08fc8a70 234
mbedAustin 11:cada08fc8a70 235 /*
mbedAustin 11:cada08fc8a70 236 * SHA-256 process buffer
mbedAustin 11:cada08fc8a70 237 */
mbedAustin 11:cada08fc8a70 238 void mbedtls_sha256_update( mbedtls_sha256_context *ctx, const unsigned char *input,
mbedAustin 11:cada08fc8a70 239 size_t ilen )
mbedAustin 11:cada08fc8a70 240 {
mbedAustin 11:cada08fc8a70 241 size_t fill;
mbedAustin 11:cada08fc8a70 242 uint32_t left;
mbedAustin 11:cada08fc8a70 243
mbedAustin 11:cada08fc8a70 244 if( ilen == 0 )
mbedAustin 11:cada08fc8a70 245 return;
mbedAustin 11:cada08fc8a70 246
mbedAustin 11:cada08fc8a70 247 left = ctx->total[0] & 0x3F;
mbedAustin 11:cada08fc8a70 248 fill = 64 - left;
mbedAustin 11:cada08fc8a70 249
mbedAustin 11:cada08fc8a70 250 ctx->total[0] += (uint32_t) ilen;
mbedAustin 11:cada08fc8a70 251 ctx->total[0] &= 0xFFFFFFFF;
mbedAustin 11:cada08fc8a70 252
mbedAustin 11:cada08fc8a70 253 if( ctx->total[0] < (uint32_t) ilen )
mbedAustin 11:cada08fc8a70 254 ctx->total[1]++;
mbedAustin 11:cada08fc8a70 255
mbedAustin 11:cada08fc8a70 256 if( left && ilen >= fill )
mbedAustin 11:cada08fc8a70 257 {
mbedAustin 11:cada08fc8a70 258 memcpy( (void *) (ctx->buffer + left), input, fill );
mbedAustin 11:cada08fc8a70 259 mbedtls_sha256_process( ctx, ctx->buffer );
mbedAustin 11:cada08fc8a70 260 input += fill;
mbedAustin 11:cada08fc8a70 261 ilen -= fill;
mbedAustin 11:cada08fc8a70 262 left = 0;
mbedAustin 11:cada08fc8a70 263 }
mbedAustin 11:cada08fc8a70 264
mbedAustin 11:cada08fc8a70 265 while( ilen >= 64 )
mbedAustin 11:cada08fc8a70 266 {
mbedAustin 11:cada08fc8a70 267 mbedtls_sha256_process( ctx, input );
mbedAustin 11:cada08fc8a70 268 input += 64;
mbedAustin 11:cada08fc8a70 269 ilen -= 64;
mbedAustin 11:cada08fc8a70 270 }
mbedAustin 11:cada08fc8a70 271
mbedAustin 11:cada08fc8a70 272 if( ilen > 0 )
mbedAustin 11:cada08fc8a70 273 memcpy( (void *) (ctx->buffer + left), input, ilen );
mbedAustin 11:cada08fc8a70 274 }
mbedAustin 11:cada08fc8a70 275
mbedAustin 11:cada08fc8a70 276 static const unsigned char sha256_padding[64] =
mbedAustin 11:cada08fc8a70 277 {
mbedAustin 11:cada08fc8a70 278 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
mbedAustin 11:cada08fc8a70 279 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
mbedAustin 11:cada08fc8a70 280 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
mbedAustin 11:cada08fc8a70 281 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
mbedAustin 11:cada08fc8a70 282 };
mbedAustin 11:cada08fc8a70 283
mbedAustin 11:cada08fc8a70 284 /*
mbedAustin 11:cada08fc8a70 285 * SHA-256 final digest
mbedAustin 11:cada08fc8a70 286 */
mbedAustin 11:cada08fc8a70 287 void mbedtls_sha256_finish( mbedtls_sha256_context *ctx, unsigned char output[32] )
mbedAustin 11:cada08fc8a70 288 {
mbedAustin 11:cada08fc8a70 289 uint32_t last, padn;
mbedAustin 11:cada08fc8a70 290 uint32_t high, low;
mbedAustin 11:cada08fc8a70 291 unsigned char msglen[8];
mbedAustin 11:cada08fc8a70 292
mbedAustin 11:cada08fc8a70 293 high = ( ctx->total[0] >> 29 )
mbedAustin 11:cada08fc8a70 294 | ( ctx->total[1] << 3 );
mbedAustin 11:cada08fc8a70 295 low = ( ctx->total[0] << 3 );
mbedAustin 11:cada08fc8a70 296
mbedAustin 11:cada08fc8a70 297 PUT_UINT32_BE( high, msglen, 0 );
mbedAustin 11:cada08fc8a70 298 PUT_UINT32_BE( low, msglen, 4 );
mbedAustin 11:cada08fc8a70 299
mbedAustin 11:cada08fc8a70 300 last = ctx->total[0] & 0x3F;
mbedAustin 11:cada08fc8a70 301 padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );
mbedAustin 11:cada08fc8a70 302
mbedAustin 11:cada08fc8a70 303 mbedtls_sha256_update( ctx, sha256_padding, padn );
mbedAustin 11:cada08fc8a70 304 mbedtls_sha256_update( ctx, msglen, 8 );
mbedAustin 11:cada08fc8a70 305
mbedAustin 11:cada08fc8a70 306 PUT_UINT32_BE( ctx->state[0], output, 0 );
mbedAustin 11:cada08fc8a70 307 PUT_UINT32_BE( ctx->state[1], output, 4 );
mbedAustin 11:cada08fc8a70 308 PUT_UINT32_BE( ctx->state[2], output, 8 );
mbedAustin 11:cada08fc8a70 309 PUT_UINT32_BE( ctx->state[3], output, 12 );
mbedAustin 11:cada08fc8a70 310 PUT_UINT32_BE( ctx->state[4], output, 16 );
mbedAustin 11:cada08fc8a70 311 PUT_UINT32_BE( ctx->state[5], output, 20 );
mbedAustin 11:cada08fc8a70 312 PUT_UINT32_BE( ctx->state[6], output, 24 );
mbedAustin 11:cada08fc8a70 313
mbedAustin 11:cada08fc8a70 314 if( ctx->is224 == 0 )
mbedAustin 11:cada08fc8a70 315 PUT_UINT32_BE( ctx->state[7], output, 28 );
mbedAustin 11:cada08fc8a70 316 }
mbedAustin 11:cada08fc8a70 317
mbedAustin 11:cada08fc8a70 318 #endif /* !MBEDTLS_SHA256_ALT */
mbedAustin 11:cada08fc8a70 319
mbedAustin 11:cada08fc8a70 320 /*
mbedAustin 11:cada08fc8a70 321 * output = SHA-256( input buffer )
mbedAustin 11:cada08fc8a70 322 */
mbedAustin 11:cada08fc8a70 323 void mbedtls_sha256( const unsigned char *input, size_t ilen,
mbedAustin 11:cada08fc8a70 324 unsigned char output[32], int is224 )
mbedAustin 11:cada08fc8a70 325 {
mbedAustin 11:cada08fc8a70 326 mbedtls_sha256_context ctx;
mbedAustin 11:cada08fc8a70 327
mbedAustin 11:cada08fc8a70 328 mbedtls_sha256_init( &ctx );
mbedAustin 11:cada08fc8a70 329 mbedtls_sha256_starts( &ctx, is224 );
mbedAustin 11:cada08fc8a70 330 mbedtls_sha256_update( &ctx, input, ilen );
mbedAustin 11:cada08fc8a70 331 mbedtls_sha256_finish( &ctx, output );
mbedAustin 11:cada08fc8a70 332 mbedtls_sha256_free( &ctx );
mbedAustin 11:cada08fc8a70 333 }
mbedAustin 11:cada08fc8a70 334
mbedAustin 11:cada08fc8a70 335 #if defined(MBEDTLS_SELF_TEST)
mbedAustin 11:cada08fc8a70 336 /*
mbedAustin 11:cada08fc8a70 337 * FIPS-180-2 test vectors
mbedAustin 11:cada08fc8a70 338 */
mbedAustin 11:cada08fc8a70 339 static const unsigned char sha256_test_buf[3][57] =
mbedAustin 11:cada08fc8a70 340 {
mbedAustin 11:cada08fc8a70 341 { "abc" },
mbedAustin 11:cada08fc8a70 342 { "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" },
mbedAustin 11:cada08fc8a70 343 { "" }
mbedAustin 11:cada08fc8a70 344 };
mbedAustin 11:cada08fc8a70 345
mbedAustin 11:cada08fc8a70 346 static const int sha256_test_buflen[3] =
mbedAustin 11:cada08fc8a70 347 {
mbedAustin 11:cada08fc8a70 348 3, 56, 1000
mbedAustin 11:cada08fc8a70 349 };
mbedAustin 11:cada08fc8a70 350
mbedAustin 11:cada08fc8a70 351 static const unsigned char sha256_test_sum[6][32] =
mbedAustin 11:cada08fc8a70 352 {
mbedAustin 11:cada08fc8a70 353 /*
mbedAustin 11:cada08fc8a70 354 * SHA-224 test vectors
mbedAustin 11:cada08fc8a70 355 */
mbedAustin 11:cada08fc8a70 356 { 0x23, 0x09, 0x7D, 0x22, 0x34, 0x05, 0xD8, 0x22,
mbedAustin 11:cada08fc8a70 357 0x86, 0x42, 0xA4, 0x77, 0xBD, 0xA2, 0x55, 0xB3,
mbedAustin 11:cada08fc8a70 358 0x2A, 0xAD, 0xBC, 0xE4, 0xBD, 0xA0, 0xB3, 0xF7,
mbedAustin 11:cada08fc8a70 359 0xE3, 0x6C, 0x9D, 0xA7 },
mbedAustin 11:cada08fc8a70 360 { 0x75, 0x38, 0x8B, 0x16, 0x51, 0x27, 0x76, 0xCC,
mbedAustin 11:cada08fc8a70 361 0x5D, 0xBA, 0x5D, 0xA1, 0xFD, 0x89, 0x01, 0x50,
mbedAustin 11:cada08fc8a70 362 0xB0, 0xC6, 0x45, 0x5C, 0xB4, 0xF5, 0x8B, 0x19,
mbedAustin 11:cada08fc8a70 363 0x52, 0x52, 0x25, 0x25 },
mbedAustin 11:cada08fc8a70 364 { 0x20, 0x79, 0x46, 0x55, 0x98, 0x0C, 0x91, 0xD8,
mbedAustin 11:cada08fc8a70 365 0xBB, 0xB4, 0xC1, 0xEA, 0x97, 0x61, 0x8A, 0x4B,
mbedAustin 11:cada08fc8a70 366 0xF0, 0x3F, 0x42, 0x58, 0x19, 0x48, 0xB2, 0xEE,
mbedAustin 11:cada08fc8a70 367 0x4E, 0xE7, 0xAD, 0x67 },
mbedAustin 11:cada08fc8a70 368
mbedAustin 11:cada08fc8a70 369 /*
mbedAustin 11:cada08fc8a70 370 * SHA-256 test vectors
mbedAustin 11:cada08fc8a70 371 */
mbedAustin 11:cada08fc8a70 372 { 0xBA, 0x78, 0x16, 0xBF, 0x8F, 0x01, 0xCF, 0xEA,
mbedAustin 11:cada08fc8a70 373 0x41, 0x41, 0x40, 0xDE, 0x5D, 0xAE, 0x22, 0x23,
mbedAustin 11:cada08fc8a70 374 0xB0, 0x03, 0x61, 0xA3, 0x96, 0x17, 0x7A, 0x9C,
mbedAustin 11:cada08fc8a70 375 0xB4, 0x10, 0xFF, 0x61, 0xF2, 0x00, 0x15, 0xAD },
mbedAustin 11:cada08fc8a70 376 { 0x24, 0x8D, 0x6A, 0x61, 0xD2, 0x06, 0x38, 0xB8,
mbedAustin 11:cada08fc8a70 377 0xE5, 0xC0, 0x26, 0x93, 0x0C, 0x3E, 0x60, 0x39,
mbedAustin 11:cada08fc8a70 378 0xA3, 0x3C, 0xE4, 0x59, 0x64, 0xFF, 0x21, 0x67,
mbedAustin 11:cada08fc8a70 379 0xF6, 0xEC, 0xED, 0xD4, 0x19, 0xDB, 0x06, 0xC1 },
mbedAustin 11:cada08fc8a70 380 { 0xCD, 0xC7, 0x6E, 0x5C, 0x99, 0x14, 0xFB, 0x92,
mbedAustin 11:cada08fc8a70 381 0x81, 0xA1, 0xC7, 0xE2, 0x84, 0xD7, 0x3E, 0x67,
mbedAustin 11:cada08fc8a70 382 0xF1, 0x80, 0x9A, 0x48, 0xA4, 0x97, 0x20, 0x0E,
mbedAustin 11:cada08fc8a70 383 0x04, 0x6D, 0x39, 0xCC, 0xC7, 0x11, 0x2C, 0xD0 }
mbedAustin 11:cada08fc8a70 384 };
mbedAustin 11:cada08fc8a70 385
mbedAustin 11:cada08fc8a70 386 /*
mbedAustin 11:cada08fc8a70 387 * Checkup routine
mbedAustin 11:cada08fc8a70 388 */
mbedAustin 11:cada08fc8a70 389 int mbedtls_sha256_self_test( int verbose )
mbedAustin 11:cada08fc8a70 390 {
mbedAustin 11:cada08fc8a70 391 int i, j, k, buflen, ret = 0;
mbedAustin 11:cada08fc8a70 392 unsigned char buf[1024];
mbedAustin 11:cada08fc8a70 393 unsigned char sha256sum[32];
mbedAustin 11:cada08fc8a70 394 mbedtls_sha256_context ctx;
mbedAustin 11:cada08fc8a70 395
mbedAustin 11:cada08fc8a70 396 mbedtls_sha256_init( &ctx );
mbedAustin 11:cada08fc8a70 397
mbedAustin 11:cada08fc8a70 398 for( i = 0; i < 6; i++ )
mbedAustin 11:cada08fc8a70 399 {
mbedAustin 11:cada08fc8a70 400 j = i % 3;
mbedAustin 11:cada08fc8a70 401 k = i < 3;
mbedAustin 11:cada08fc8a70 402
mbedAustin 11:cada08fc8a70 403 if( verbose != 0 )
mbedAustin 11:cada08fc8a70 404 mbedtls_printf( " SHA-%d test #%d: ", 256 - k * 32, j + 1 );
mbedAustin 11:cada08fc8a70 405
mbedAustin 11:cada08fc8a70 406 mbedtls_sha256_starts( &ctx, k );
mbedAustin 11:cada08fc8a70 407
mbedAustin 11:cada08fc8a70 408 if( j == 2 )
mbedAustin 11:cada08fc8a70 409 {
mbedAustin 11:cada08fc8a70 410 memset( buf, 'a', buflen = 1000 );
mbedAustin 11:cada08fc8a70 411
mbedAustin 11:cada08fc8a70 412 for( j = 0; j < 1000; j++ )
mbedAustin 11:cada08fc8a70 413 mbedtls_sha256_update( &ctx, buf, buflen );
mbedAustin 11:cada08fc8a70 414 }
mbedAustin 11:cada08fc8a70 415 else
mbedAustin 11:cada08fc8a70 416 mbedtls_sha256_update( &ctx, sha256_test_buf[j],
mbedAustin 11:cada08fc8a70 417 sha256_test_buflen[j] );
mbedAustin 11:cada08fc8a70 418
mbedAustin 11:cada08fc8a70 419 mbedtls_sha256_finish( &ctx, sha256sum );
mbedAustin 11:cada08fc8a70 420
mbedAustin 11:cada08fc8a70 421 if( memcmp( sha256sum, sha256_test_sum[i], 32 - k * 4 ) != 0 )
mbedAustin 11:cada08fc8a70 422 {
mbedAustin 11:cada08fc8a70 423 if( verbose != 0 )
mbedAustin 11:cada08fc8a70 424 mbedtls_printf( "failed\n" );
mbedAustin 11:cada08fc8a70 425
mbedAustin 11:cada08fc8a70 426 ret = 1;
mbedAustin 11:cada08fc8a70 427 goto exit;
mbedAustin 11:cada08fc8a70 428 }
mbedAustin 11:cada08fc8a70 429
mbedAustin 11:cada08fc8a70 430 if( verbose != 0 )
mbedAustin 11:cada08fc8a70 431 mbedtls_printf( "passed\n" );
mbedAustin 11:cada08fc8a70 432 }
mbedAustin 11:cada08fc8a70 433
mbedAustin 11:cada08fc8a70 434 if( verbose != 0 )
mbedAustin 11:cada08fc8a70 435 mbedtls_printf( "\n" );
mbedAustin 11:cada08fc8a70 436
mbedAustin 11:cada08fc8a70 437 exit:
mbedAustin 11:cada08fc8a70 438 mbedtls_sha256_free( &ctx );
mbedAustin 11:cada08fc8a70 439
mbedAustin 11:cada08fc8a70 440 return( ret );
mbedAustin 11:cada08fc8a70 441 }
mbedAustin 11:cada08fc8a70 442
mbedAustin 11:cada08fc8a70 443 #endif /* MBEDTLS_SELF_TEST */
mbedAustin 11:cada08fc8a70 444
mbedAustin 11:cada08fc8a70 445 #endif /* MBEDTLS_SHA256_C */