Nitin Shukla / LED_Demo

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Dependencies:   MAX44000 nexpaq_mdk

Fork of LED_Demo by Maxim nexpaq

mbd_os/features/mbedtls/src/sha256.c@1:55a6170b404f, 2016-09-17 (annotated)

Committer:
nexpaq
Date:
Sat Sep 17 16:32:05 2016 +0000
Revision:
1:55a6170b404f
checking in for sharing

Who changed what in which revision?

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nexpaq 1:55a6170b404f 1 /*
nexpaq 1:55a6170b404f 2 * FIPS-180-2 compliant SHA-256 implementation
nexpaq 1:55a6170b404f 3 *
nexpaq 1:55a6170b404f 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
nexpaq 1:55a6170b404f 5 * SPDX-License-Identifier: Apache-2.0
nexpaq 1:55a6170b404f 6 *
nexpaq 1:55a6170b404f 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
nexpaq 1:55a6170b404f 8 * not use this file except in compliance with the License.
nexpaq 1:55a6170b404f 9 * You may obtain a copy of the License at
nexpaq 1:55a6170b404f 10 *
nexpaq 1:55a6170b404f 11 * http://www.apache.org/licenses/LICENSE-2.0
nexpaq 1:55a6170b404f 12 *
nexpaq 1:55a6170b404f 13 * Unless required by applicable law or agreed to in writing, software
nexpaq 1:55a6170b404f 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
nexpaq 1:55a6170b404f 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
nexpaq 1:55a6170b404f 16 * See the License for the specific language governing permissions and
nexpaq 1:55a6170b404f 17 * limitations under the License.
nexpaq 1:55a6170b404f 18 *
nexpaq 1:55a6170b404f 19 * This file is part of mbed TLS (https://tls.mbed.org)
nexpaq 1:55a6170b404f 20 */
nexpaq 1:55a6170b404f 21 /*
nexpaq 1:55a6170b404f 22 * The SHA-256 Secure Hash Standard was published by NIST in 2002.
nexpaq 1:55a6170b404f 23 *
nexpaq 1:55a6170b404f 24 * http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
nexpaq 1:55a6170b404f 25 */
nexpaq 1:55a6170b404f 26
nexpaq 1:55a6170b404f 27 #if !defined(MBEDTLS_CONFIG_FILE)
nexpaq 1:55a6170b404f 28 #include "mbedtls/config.h"
nexpaq 1:55a6170b404f 29 #else
nexpaq 1:55a6170b404f 30 #include MBEDTLS_CONFIG_FILE
nexpaq 1:55a6170b404f 31 #endif
nexpaq 1:55a6170b404f 32
nexpaq 1:55a6170b404f 33 #if defined(MBEDTLS_SHA256_C)
nexpaq 1:55a6170b404f 34
nexpaq 1:55a6170b404f 35 #include "mbedtls/sha256.h"
nexpaq 1:55a6170b404f 36
nexpaq 1:55a6170b404f 37 #include <string.h>
nexpaq 1:55a6170b404f 38
nexpaq 1:55a6170b404f 39 #if defined(MBEDTLS_SELF_TEST)
nexpaq 1:55a6170b404f 40 #if defined(MBEDTLS_PLATFORM_C)
nexpaq 1:55a6170b404f 41 #include "mbedtls/platform.h"
nexpaq 1:55a6170b404f 42 #else
nexpaq 1:55a6170b404f 43 #include <stdio.h>
nexpaq 1:55a6170b404f 44 #define mbedtls_printf printf
nexpaq 1:55a6170b404f 45 #endif /* MBEDTLS_PLATFORM_C */
nexpaq 1:55a6170b404f 46 #endif /* MBEDTLS_SELF_TEST */
nexpaq 1:55a6170b404f 47
nexpaq 1:55a6170b404f 48 #if !defined(MBEDTLS_SHA256_ALT)
nexpaq 1:55a6170b404f 49
nexpaq 1:55a6170b404f 50 /* Implementation that should never be optimized out by the compiler */
nexpaq 1:55a6170b404f 51 static void mbedtls_zeroize( void *v, size_t n ) {
nexpaq 1:55a6170b404f 52 volatile unsigned char *p = v; while( n-- ) *p++ = 0;
nexpaq 1:55a6170b404f 53 }
nexpaq 1:55a6170b404f 54
nexpaq 1:55a6170b404f 55 /*
nexpaq 1:55a6170b404f 56 * 32-bit integer manipulation macros (big endian)
nexpaq 1:55a6170b404f 57 */
nexpaq 1:55a6170b404f 58 #ifndef GET_UINT32_BE
nexpaq 1:55a6170b404f 59 #define GET_UINT32_BE(n,b,i) \
nexpaq 1:55a6170b404f 60 do { \
nexpaq 1:55a6170b404f 61 (n) = ( (uint32_t) (b)[(i) ] << 24 ) \
nexpaq 1:55a6170b404f 62 | ( (uint32_t) (b)[(i) + 1] << 16 ) \
nexpaq 1:55a6170b404f 63 | ( (uint32_t) (b)[(i) + 2] << 8 ) \
nexpaq 1:55a6170b404f 64 | ( (uint32_t) (b)[(i) + 3] ); \
nexpaq 1:55a6170b404f 65 } while( 0 )
nexpaq 1:55a6170b404f 66 #endif
nexpaq 1:55a6170b404f 67
nexpaq 1:55a6170b404f 68 #ifndef PUT_UINT32_BE
nexpaq 1:55a6170b404f 69 #define PUT_UINT32_BE(n,b,i) \
nexpaq 1:55a6170b404f 70 do { \
nexpaq 1:55a6170b404f 71 (b)[(i) ] = (unsigned char) ( (n) >> 24 ); \
nexpaq 1:55a6170b404f 72 (b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \
nexpaq 1:55a6170b404f 73 (b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \
nexpaq 1:55a6170b404f 74 (b)[(i) + 3] = (unsigned char) ( (n) ); \
nexpaq 1:55a6170b404f 75 } while( 0 )
nexpaq 1:55a6170b404f 76 #endif
nexpaq 1:55a6170b404f 77
nexpaq 1:55a6170b404f 78 void mbedtls_sha256_init( mbedtls_sha256_context *ctx )
nexpaq 1:55a6170b404f 79 {
nexpaq 1:55a6170b404f 80 memset( ctx, 0, sizeof( mbedtls_sha256_context ) );
nexpaq 1:55a6170b404f 81 }
nexpaq 1:55a6170b404f 82
nexpaq 1:55a6170b404f 83 void mbedtls_sha256_free( mbedtls_sha256_context *ctx )
nexpaq 1:55a6170b404f 84 {
nexpaq 1:55a6170b404f 85 if( ctx == NULL )
nexpaq 1:55a6170b404f 86 return;
nexpaq 1:55a6170b404f 87
nexpaq 1:55a6170b404f 88 mbedtls_zeroize( ctx, sizeof( mbedtls_sha256_context ) );
nexpaq 1:55a6170b404f 89 }
nexpaq 1:55a6170b404f 90
nexpaq 1:55a6170b404f 91 void mbedtls_sha256_clone( mbedtls_sha256_context *dst,
nexpaq 1:55a6170b404f 92 const mbedtls_sha256_context *src )
nexpaq 1:55a6170b404f 93 {
nexpaq 1:55a6170b404f 94 *dst = *src;
nexpaq 1:55a6170b404f 95 }
nexpaq 1:55a6170b404f 96
nexpaq 1:55a6170b404f 97 /*
nexpaq 1:55a6170b404f 98 * SHA-256 context setup
nexpaq 1:55a6170b404f 99 */
nexpaq 1:55a6170b404f 100 void mbedtls_sha256_starts( mbedtls_sha256_context *ctx, int is224 )
nexpaq 1:55a6170b404f 101 {
nexpaq 1:55a6170b404f 102 ctx->total[0] = 0;
nexpaq 1:55a6170b404f 103 ctx->total[1] = 0;
nexpaq 1:55a6170b404f 104
nexpaq 1:55a6170b404f 105 if( is224 == 0 )
nexpaq 1:55a6170b404f 106 {
nexpaq 1:55a6170b404f 107 /* SHA-256 */
nexpaq 1:55a6170b404f 108 ctx->state[0] = 0x6A09E667;
nexpaq 1:55a6170b404f 109 ctx->state[1] = 0xBB67AE85;
nexpaq 1:55a6170b404f 110 ctx->state[2] = 0x3C6EF372;
nexpaq 1:55a6170b404f 111 ctx->state[3] = 0xA54FF53A;
nexpaq 1:55a6170b404f 112 ctx->state[4] = 0x510E527F;
nexpaq 1:55a6170b404f 113 ctx->state[5] = 0x9B05688C;
nexpaq 1:55a6170b404f 114 ctx->state[6] = 0x1F83D9AB;
nexpaq 1:55a6170b404f 115 ctx->state[7] = 0x5BE0CD19;
nexpaq 1:55a6170b404f 116 }
nexpaq 1:55a6170b404f 117 else
nexpaq 1:55a6170b404f 118 {
nexpaq 1:55a6170b404f 119 /* SHA-224 */
nexpaq 1:55a6170b404f 120 ctx->state[0] = 0xC1059ED8;
nexpaq 1:55a6170b404f 121 ctx->state[1] = 0x367CD507;
nexpaq 1:55a6170b404f 122 ctx->state[2] = 0x3070DD17;
nexpaq 1:55a6170b404f 123 ctx->state[3] = 0xF70E5939;
nexpaq 1:55a6170b404f 124 ctx->state[4] = 0xFFC00B31;
nexpaq 1:55a6170b404f 125 ctx->state[5] = 0x68581511;
nexpaq 1:55a6170b404f 126 ctx->state[6] = 0x64F98FA7;
nexpaq 1:55a6170b404f 127 ctx->state[7] = 0xBEFA4FA4;
nexpaq 1:55a6170b404f 128 }
nexpaq 1:55a6170b404f 129
nexpaq 1:55a6170b404f 130 ctx->is224 = is224;
nexpaq 1:55a6170b404f 131 }
nexpaq 1:55a6170b404f 132
nexpaq 1:55a6170b404f 133 #if !defined(MBEDTLS_SHA256_PROCESS_ALT)
nexpaq 1:55a6170b404f 134 static const uint32_t K[] =
nexpaq 1:55a6170b404f 135 {
nexpaq 1:55a6170b404f 136 0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5,
nexpaq 1:55a6170b404f 137 0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5,
nexpaq 1:55a6170b404f 138 0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3,
nexpaq 1:55a6170b404f 139 0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174,
nexpaq 1:55a6170b404f 140 0xE49B69C1, 0xEFBE4786, 0x0FC19DC6, 0x240CA1CC,
nexpaq 1:55a6170b404f 141 0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA,
nexpaq 1:55a6170b404f 142 0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7,
nexpaq 1:55a6170b404f 143 0xC6E00BF3, 0xD5A79147, 0x06CA6351, 0x14292967,
nexpaq 1:55a6170b404f 144 0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13,
nexpaq 1:55a6170b404f 145 0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85,
nexpaq 1:55a6170b404f 146 0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3,
nexpaq 1:55a6170b404f 147 0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070,
nexpaq 1:55a6170b404f 148 0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5,
nexpaq 1:55a6170b404f 149 0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3,
nexpaq 1:55a6170b404f 150 0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208,
nexpaq 1:55a6170b404f 151 0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2,
nexpaq 1:55a6170b404f 152 };
nexpaq 1:55a6170b404f 153
nexpaq 1:55a6170b404f 154 #define SHR(x,n) ((x & 0xFFFFFFFF) >> n)
nexpaq 1:55a6170b404f 155 #define ROTR(x,n) (SHR(x,n) | (x << (32 - n)))
nexpaq 1:55a6170b404f 156
nexpaq 1:55a6170b404f 157 #define S0(x) (ROTR(x, 7) ^ ROTR(x,18) ^ SHR(x, 3))
nexpaq 1:55a6170b404f 158 #define S1(x) (ROTR(x,17) ^ ROTR(x,19) ^ SHR(x,10))
nexpaq 1:55a6170b404f 159
nexpaq 1:55a6170b404f 160 #define S2(x) (ROTR(x, 2) ^ ROTR(x,13) ^ ROTR(x,22))
nexpaq 1:55a6170b404f 161 #define S3(x) (ROTR(x, 6) ^ ROTR(x,11) ^ ROTR(x,25))
nexpaq 1:55a6170b404f 162
nexpaq 1:55a6170b404f 163 #define F0(x,y,z) ((x & y) | (z & (x | y)))
nexpaq 1:55a6170b404f 164 #define F1(x,y,z) (z ^ (x & (y ^ z)))
nexpaq 1:55a6170b404f 165
nexpaq 1:55a6170b404f 166 #define R(t) \
nexpaq 1:55a6170b404f 167 ( \
nexpaq 1:55a6170b404f 168 W[t] = S1(W[t - 2]) + W[t - 7] + \
nexpaq 1:55a6170b404f 169 S0(W[t - 15]) + W[t - 16] \
nexpaq 1:55a6170b404f 170 )
nexpaq 1:55a6170b404f 171
nexpaq 1:55a6170b404f 172 #define P(a,b,c,d,e,f,g,h,x,K) \
nexpaq 1:55a6170b404f 173 { \
nexpaq 1:55a6170b404f 174 temp1 = h + S3(e) + F1(e,f,g) + K + x; \
nexpaq 1:55a6170b404f 175 temp2 = S2(a) + F0(a,b,c); \
nexpaq 1:55a6170b404f 176 d += temp1; h = temp1 + temp2; \
nexpaq 1:55a6170b404f 177 }
nexpaq 1:55a6170b404f 178
nexpaq 1:55a6170b404f 179 void mbedtls_sha256_process( mbedtls_sha256_context *ctx, const unsigned char data[64] )
nexpaq 1:55a6170b404f 180 {
nexpaq 1:55a6170b404f 181 uint32_t temp1, temp2, W[64];
nexpaq 1:55a6170b404f 182 uint32_t A[8];
nexpaq 1:55a6170b404f 183 unsigned int i;
nexpaq 1:55a6170b404f 184
nexpaq 1:55a6170b404f 185 for( i = 0; i < 8; i++ )
nexpaq 1:55a6170b404f 186 A[i] = ctx->state[i];
nexpaq 1:55a6170b404f 187
nexpaq 1:55a6170b404f 188 #if defined(MBEDTLS_SHA256_SMALLER)
nexpaq 1:55a6170b404f 189 for( i = 0; i < 64; i++ )
nexpaq 1:55a6170b404f 190 {
nexpaq 1:55a6170b404f 191 if( i < 16 )
nexpaq 1:55a6170b404f 192 GET_UINT32_BE( W[i], data, 4 * i );
nexpaq 1:55a6170b404f 193 else
nexpaq 1:55a6170b404f 194 R( i );
nexpaq 1:55a6170b404f 195
nexpaq 1:55a6170b404f 196 P( A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], W[i], K[i] );
nexpaq 1:55a6170b404f 197
nexpaq 1:55a6170b404f 198 temp1 = A[7]; A[7] = A[6]; A[6] = A[5]; A[5] = A[4]; A[4] = A[3];
nexpaq 1:55a6170b404f 199 A[3] = A[2]; A[2] = A[1]; A[1] = A[0]; A[0] = temp1;
nexpaq 1:55a6170b404f 200 }
nexpaq 1:55a6170b404f 201 #else /* MBEDTLS_SHA256_SMALLER */
nexpaq 1:55a6170b404f 202 for( i = 0; i < 16; i++ )
nexpaq 1:55a6170b404f 203 GET_UINT32_BE( W[i], data, 4 * i );
nexpaq 1:55a6170b404f 204
nexpaq 1:55a6170b404f 205 for( i = 0; i < 16; i += 8 )
nexpaq 1:55a6170b404f 206 {
nexpaq 1:55a6170b404f 207 P( A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], W[i+0], K[i+0] );
nexpaq 1:55a6170b404f 208 P( A[7], A[0], A[1], A[2], A[3], A[4], A[5], A[6], W[i+1], K[i+1] );
nexpaq 1:55a6170b404f 209 P( A[6], A[7], A[0], A[1], A[2], A[3], A[4], A[5], W[i+2], K[i+2] );
nexpaq 1:55a6170b404f 210 P( A[5], A[6], A[7], A[0], A[1], A[2], A[3], A[4], W[i+3], K[i+3] );
nexpaq 1:55a6170b404f 211 P( A[4], A[5], A[6], A[7], A[0], A[1], A[2], A[3], W[i+4], K[i+4] );
nexpaq 1:55a6170b404f 212 P( A[3], A[4], A[5], A[6], A[7], A[0], A[1], A[2], W[i+5], K[i+5] );
nexpaq 1:55a6170b404f 213 P( A[2], A[3], A[4], A[5], A[6], A[7], A[0], A[1], W[i+6], K[i+6] );
nexpaq 1:55a6170b404f 214 P( A[1], A[2], A[3], A[4], A[5], A[6], A[7], A[0], W[i+7], K[i+7] );
nexpaq 1:55a6170b404f 215 }
nexpaq 1:55a6170b404f 216
nexpaq 1:55a6170b404f 217 for( i = 16; i < 64; i += 8 )
nexpaq 1:55a6170b404f 218 {
nexpaq 1:55a6170b404f 219 P( A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], R(i+0), K[i+0] );
nexpaq 1:55a6170b404f 220 P( A[7], A[0], A[1], A[2], A[3], A[4], A[5], A[6], R(i+1), K[i+1] );
nexpaq 1:55a6170b404f 221 P( A[6], A[7], A[0], A[1], A[2], A[3], A[4], A[5], R(i+2), K[i+2] );
nexpaq 1:55a6170b404f 222 P( A[5], A[6], A[7], A[0], A[1], A[2], A[3], A[4], R(i+3), K[i+3] );
nexpaq 1:55a6170b404f 223 P( A[4], A[5], A[6], A[7], A[0], A[1], A[2], A[3], R(i+4), K[i+4] );
nexpaq 1:55a6170b404f 224 P( A[3], A[4], A[5], A[6], A[7], A[0], A[1], A[2], R(i+5), K[i+5] );
nexpaq 1:55a6170b404f 225 P( A[2], A[3], A[4], A[5], A[6], A[7], A[0], A[1], R(i+6), K[i+6] );
nexpaq 1:55a6170b404f 226 P( A[1], A[2], A[3], A[4], A[5], A[6], A[7], A[0], R(i+7), K[i+7] );
nexpaq 1:55a6170b404f 227 }
nexpaq 1:55a6170b404f 228 #endif /* MBEDTLS_SHA256_SMALLER */
nexpaq 1:55a6170b404f 229
nexpaq 1:55a6170b404f 230 for( i = 0; i < 8; i++ )
nexpaq 1:55a6170b404f 231 ctx->state[i] += A[i];
nexpaq 1:55a6170b404f 232 }
nexpaq 1:55a6170b404f 233 #endif /* !MBEDTLS_SHA256_PROCESS_ALT */
nexpaq 1:55a6170b404f 234
nexpaq 1:55a6170b404f 235 /*
nexpaq 1:55a6170b404f 236 * SHA-256 process buffer
nexpaq 1:55a6170b404f 237 */
nexpaq 1:55a6170b404f 238 void mbedtls_sha256_update( mbedtls_sha256_context *ctx, const unsigned char *input,
nexpaq 1:55a6170b404f 239 size_t ilen )
nexpaq 1:55a6170b404f 240 {
nexpaq 1:55a6170b404f 241 size_t fill;
nexpaq 1:55a6170b404f 242 uint32_t left;
nexpaq 1:55a6170b404f 243
nexpaq 1:55a6170b404f 244 if( ilen == 0 )
nexpaq 1:55a6170b404f 245 return;
nexpaq 1:55a6170b404f 246
nexpaq 1:55a6170b404f 247 left = ctx->total[0] & 0x3F;
nexpaq 1:55a6170b404f 248 fill = 64 - left;
nexpaq 1:55a6170b404f 249
nexpaq 1:55a6170b404f 250 ctx->total[0] += (uint32_t) ilen;
nexpaq 1:55a6170b404f 251 ctx->total[0] &= 0xFFFFFFFF;
nexpaq 1:55a6170b404f 252
nexpaq 1:55a6170b404f 253 if( ctx->total[0] < (uint32_t) ilen )
nexpaq 1:55a6170b404f 254 ctx->total[1]++;
nexpaq 1:55a6170b404f 255
nexpaq 1:55a6170b404f 256 if( left && ilen >= fill )
nexpaq 1:55a6170b404f 257 {
nexpaq 1:55a6170b404f 258 memcpy( (void *) (ctx->buffer + left), input, fill );
nexpaq 1:55a6170b404f 259 mbedtls_sha256_process( ctx, ctx->buffer );
nexpaq 1:55a6170b404f 260 input += fill;
nexpaq 1:55a6170b404f 261 ilen -= fill;
nexpaq 1:55a6170b404f 262 left = 0;
nexpaq 1:55a6170b404f 263 }
nexpaq 1:55a6170b404f 264
nexpaq 1:55a6170b404f 265 while( ilen >= 64 )
nexpaq 1:55a6170b404f 266 {
nexpaq 1:55a6170b404f 267 mbedtls_sha256_process( ctx, input );
nexpaq 1:55a6170b404f 268 input += 64;
nexpaq 1:55a6170b404f 269 ilen -= 64;
nexpaq 1:55a6170b404f 270 }
nexpaq 1:55a6170b404f 271
nexpaq 1:55a6170b404f 272 if( ilen > 0 )
nexpaq 1:55a6170b404f 273 memcpy( (void *) (ctx->buffer + left), input, ilen );
nexpaq 1:55a6170b404f 274 }
nexpaq 1:55a6170b404f 275
nexpaq 1:55a6170b404f 276 static const unsigned char sha256_padding[64] =
nexpaq 1:55a6170b404f 277 {
nexpaq 1:55a6170b404f 278 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
nexpaq 1:55a6170b404f 279 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
nexpaq 1:55a6170b404f 280 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
nexpaq 1:55a6170b404f 281 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
nexpaq 1:55a6170b404f 282 };
nexpaq 1:55a6170b404f 283
nexpaq 1:55a6170b404f 284 /*
nexpaq 1:55a6170b404f 285 * SHA-256 final digest
nexpaq 1:55a6170b404f 286 */
nexpaq 1:55a6170b404f 287 void mbedtls_sha256_finish( mbedtls_sha256_context *ctx, unsigned char output[32] )
nexpaq 1:55a6170b404f 288 {
nexpaq 1:55a6170b404f 289 uint32_t last, padn;
nexpaq 1:55a6170b404f 290 uint32_t high, low;
nexpaq 1:55a6170b404f 291 unsigned char msglen[8];
nexpaq 1:55a6170b404f 292
nexpaq 1:55a6170b404f 293 high = ( ctx->total[0] >> 29 )
nexpaq 1:55a6170b404f 294 | ( ctx->total[1] << 3 );
nexpaq 1:55a6170b404f 295 low = ( ctx->total[0] << 3 );
nexpaq 1:55a6170b404f 296
nexpaq 1:55a6170b404f 297 PUT_UINT32_BE( high, msglen, 0 );
nexpaq 1:55a6170b404f 298 PUT_UINT32_BE( low, msglen, 4 );
nexpaq 1:55a6170b404f 299
nexpaq 1:55a6170b404f 300 last = ctx->total[0] & 0x3F;
nexpaq 1:55a6170b404f 301 padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );
nexpaq 1:55a6170b404f 302
nexpaq 1:55a6170b404f 303 mbedtls_sha256_update( ctx, sha256_padding, padn );
nexpaq 1:55a6170b404f 304 mbedtls_sha256_update( ctx, msglen, 8 );
nexpaq 1:55a6170b404f 305
nexpaq 1:55a6170b404f 306 PUT_UINT32_BE( ctx->state[0], output, 0 );
nexpaq 1:55a6170b404f 307 PUT_UINT32_BE( ctx->state[1], output, 4 );
nexpaq 1:55a6170b404f 308 PUT_UINT32_BE( ctx->state[2], output, 8 );
nexpaq 1:55a6170b404f 309 PUT_UINT32_BE( ctx->state[3], output, 12 );
nexpaq 1:55a6170b404f 310 PUT_UINT32_BE( ctx->state[4], output, 16 );
nexpaq 1:55a6170b404f 311 PUT_UINT32_BE( ctx->state[5], output, 20 );
nexpaq 1:55a6170b404f 312 PUT_UINT32_BE( ctx->state[6], output, 24 );
nexpaq 1:55a6170b404f 313
nexpaq 1:55a6170b404f 314 if( ctx->is224 == 0 )
nexpaq 1:55a6170b404f 315 PUT_UINT32_BE( ctx->state[7], output, 28 );
nexpaq 1:55a6170b404f 316 }
nexpaq 1:55a6170b404f 317
nexpaq 1:55a6170b404f 318 #endif /* !MBEDTLS_SHA256_ALT */
nexpaq 1:55a6170b404f 319
nexpaq 1:55a6170b404f 320 /*
nexpaq 1:55a6170b404f 321 * output = SHA-256( input buffer )
nexpaq 1:55a6170b404f 322 */
nexpaq 1:55a6170b404f 323 void mbedtls_sha256( const unsigned char *input, size_t ilen,
nexpaq 1:55a6170b404f 324 unsigned char output[32], int is224 )
nexpaq 1:55a6170b404f 325 {
nexpaq 1:55a6170b404f 326 mbedtls_sha256_context ctx;
nexpaq 1:55a6170b404f 327
nexpaq 1:55a6170b404f 328 mbedtls_sha256_init( &ctx );
nexpaq 1:55a6170b404f 329 mbedtls_sha256_starts( &ctx, is224 );
nexpaq 1:55a6170b404f 330 mbedtls_sha256_update( &ctx, input, ilen );
nexpaq 1:55a6170b404f 331 mbedtls_sha256_finish( &ctx, output );
nexpaq 1:55a6170b404f 332 mbedtls_sha256_free( &ctx );
nexpaq 1:55a6170b404f 333 }
nexpaq 1:55a6170b404f 334
nexpaq 1:55a6170b404f 335 #if defined(MBEDTLS_SELF_TEST)
nexpaq 1:55a6170b404f 336 /*
nexpaq 1:55a6170b404f 337 * FIPS-180-2 test vectors
nexpaq 1:55a6170b404f 338 */
nexpaq 1:55a6170b404f 339 static const unsigned char sha256_test_buf[3][57] =
nexpaq 1:55a6170b404f 340 {
nexpaq 1:55a6170b404f 341 { "abc" },
nexpaq 1:55a6170b404f 342 { "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" },
nexpaq 1:55a6170b404f 343 { "" }
nexpaq 1:55a6170b404f 344 };
nexpaq 1:55a6170b404f 345
nexpaq 1:55a6170b404f 346 static const int sha256_test_buflen[3] =
nexpaq 1:55a6170b404f 347 {
nexpaq 1:55a6170b404f 348 3, 56, 1000
nexpaq 1:55a6170b404f 349 };
nexpaq 1:55a6170b404f 350
nexpaq 1:55a6170b404f 351 static const unsigned char sha256_test_sum[6][32] =
nexpaq 1:55a6170b404f 352 {
nexpaq 1:55a6170b404f 353 /*
nexpaq 1:55a6170b404f 354 * SHA-224 test vectors
nexpaq 1:55a6170b404f 355 */
nexpaq 1:55a6170b404f 356 { 0x23, 0x09, 0x7D, 0x22, 0x34, 0x05, 0xD8, 0x22,
nexpaq 1:55a6170b404f 357 0x86, 0x42, 0xA4, 0x77, 0xBD, 0xA2, 0x55, 0xB3,
nexpaq 1:55a6170b404f 358 0x2A, 0xAD, 0xBC, 0xE4, 0xBD, 0xA0, 0xB3, 0xF7,
nexpaq 1:55a6170b404f 359 0xE3, 0x6C, 0x9D, 0xA7 },
nexpaq 1:55a6170b404f 360 { 0x75, 0x38, 0x8B, 0x16, 0x51, 0x27, 0x76, 0xCC,
nexpaq 1:55a6170b404f 361 0x5D, 0xBA, 0x5D, 0xA1, 0xFD, 0x89, 0x01, 0x50,
nexpaq 1:55a6170b404f 362 0xB0, 0xC6, 0x45, 0x5C, 0xB4, 0xF5, 0x8B, 0x19,
nexpaq 1:55a6170b404f 363 0x52, 0x52, 0x25, 0x25 },
nexpaq 1:55a6170b404f 364 { 0x20, 0x79, 0x46, 0x55, 0x98, 0x0C, 0x91, 0xD8,
nexpaq 1:55a6170b404f 365 0xBB, 0xB4, 0xC1, 0xEA, 0x97, 0x61, 0x8A, 0x4B,
nexpaq 1:55a6170b404f 366 0xF0, 0x3F, 0x42, 0x58, 0x19, 0x48, 0xB2, 0xEE,
nexpaq 1:55a6170b404f 367 0x4E, 0xE7, 0xAD, 0x67 },
nexpaq 1:55a6170b404f 368
nexpaq 1:55a6170b404f 369 /*
nexpaq 1:55a6170b404f 370 * SHA-256 test vectors
nexpaq 1:55a6170b404f 371 */
nexpaq 1:55a6170b404f 372 { 0xBA, 0x78, 0x16, 0xBF, 0x8F, 0x01, 0xCF, 0xEA,
nexpaq 1:55a6170b404f 373 0x41, 0x41, 0x40, 0xDE, 0x5D, 0xAE, 0x22, 0x23,
nexpaq 1:55a6170b404f 374 0xB0, 0x03, 0x61, 0xA3, 0x96, 0x17, 0x7A, 0x9C,
nexpaq 1:55a6170b404f 375 0xB4, 0x10, 0xFF, 0x61, 0xF2, 0x00, 0x15, 0xAD },
nexpaq 1:55a6170b404f 376 { 0x24, 0x8D, 0x6A, 0x61, 0xD2, 0x06, 0x38, 0xB8,
nexpaq 1:55a6170b404f 377 0xE5, 0xC0, 0x26, 0x93, 0x0C, 0x3E, 0x60, 0x39,
nexpaq 1:55a6170b404f 378 0xA3, 0x3C, 0xE4, 0x59, 0x64, 0xFF, 0x21, 0x67,
nexpaq 1:55a6170b404f 379 0xF6, 0xEC, 0xED, 0xD4, 0x19, 0xDB, 0x06, 0xC1 },
nexpaq 1:55a6170b404f 380 { 0xCD, 0xC7, 0x6E, 0x5C, 0x99, 0x14, 0xFB, 0x92,
nexpaq 1:55a6170b404f 381 0x81, 0xA1, 0xC7, 0xE2, 0x84, 0xD7, 0x3E, 0x67,
nexpaq 1:55a6170b404f 382 0xF1, 0x80, 0x9A, 0x48, 0xA4, 0x97, 0x20, 0x0E,
nexpaq 1:55a6170b404f 383 0x04, 0x6D, 0x39, 0xCC, 0xC7, 0x11, 0x2C, 0xD0 }
nexpaq 1:55a6170b404f 384 };
nexpaq 1:55a6170b404f 385
nexpaq 1:55a6170b404f 386 /*
nexpaq 1:55a6170b404f 387 * Checkup routine
nexpaq 1:55a6170b404f 388 */
nexpaq 1:55a6170b404f 389 int mbedtls_sha256_self_test( int verbose )
nexpaq 1:55a6170b404f 390 {
nexpaq 1:55a6170b404f 391 int i, j, k, buflen, ret = 0;
nexpaq 1:55a6170b404f 392 unsigned char buf[1024];
nexpaq 1:55a6170b404f 393 unsigned char sha256sum[32];
nexpaq 1:55a6170b404f 394 mbedtls_sha256_context ctx;
nexpaq 1:55a6170b404f 395
nexpaq 1:55a6170b404f 396 mbedtls_sha256_init( &ctx );
nexpaq 1:55a6170b404f 397
nexpaq 1:55a6170b404f 398 for( i = 0; i < 6; i++ )
nexpaq 1:55a6170b404f 399 {
nexpaq 1:55a6170b404f 400 j = i % 3;
nexpaq 1:55a6170b404f 401 k = i < 3;
nexpaq 1:55a6170b404f 402
nexpaq 1:55a6170b404f 403 if( verbose != 0 )
nexpaq 1:55a6170b404f 404 mbedtls_printf( " SHA-%d test #%d: ", 256 - k * 32, j + 1 );
nexpaq 1:55a6170b404f 405
nexpaq 1:55a6170b404f 406 mbedtls_sha256_starts( &ctx, k );
nexpaq 1:55a6170b404f 407
nexpaq 1:55a6170b404f 408 if( j == 2 )
nexpaq 1:55a6170b404f 409 {
nexpaq 1:55a6170b404f 410 memset( buf, 'a', buflen = 1000 );
nexpaq 1:55a6170b404f 411
nexpaq 1:55a6170b404f 412 for( j = 0; j < 1000; j++ )
nexpaq 1:55a6170b404f 413 mbedtls_sha256_update( &ctx, buf, buflen );
nexpaq 1:55a6170b404f 414 }
nexpaq 1:55a6170b404f 415 else
nexpaq 1:55a6170b404f 416 mbedtls_sha256_update( &ctx, sha256_test_buf[j],
nexpaq 1:55a6170b404f 417 sha256_test_buflen[j] );
nexpaq 1:55a6170b404f 418
nexpaq 1:55a6170b404f 419 mbedtls_sha256_finish( &ctx, sha256sum );
nexpaq 1:55a6170b404f 420
nexpaq 1:55a6170b404f 421 if( memcmp( sha256sum, sha256_test_sum[i], 32 - k * 4 ) != 0 )
nexpaq 1:55a6170b404f 422 {
nexpaq 1:55a6170b404f 423 if( verbose != 0 )
nexpaq 1:55a6170b404f 424 mbedtls_printf( "failed\n" );
nexpaq 1:55a6170b404f 425
nexpaq 1:55a6170b404f 426 ret = 1;
nexpaq 1:55a6170b404f 427 goto exit;
nexpaq 1:55a6170b404f 428 }
nexpaq 1:55a6170b404f 429
nexpaq 1:55a6170b404f 430 if( verbose != 0 )
nexpaq 1:55a6170b404f 431 mbedtls_printf( "passed\n" );
nexpaq 1:55a6170b404f 432 }
nexpaq 1:55a6170b404f 433
nexpaq 1:55a6170b404f 434 if( verbose != 0 )
nexpaq 1:55a6170b404f 435 mbedtls_printf( "\n" );
nexpaq 1:55a6170b404f 436
nexpaq 1:55a6170b404f 437 exit:
nexpaq 1:55a6170b404f 438 mbedtls_sha256_free( &ctx );
nexpaq 1:55a6170b404f 439
nexpaq 1:55a6170b404f 440 return( ret );
nexpaq 1:55a6170b404f 441 }
nexpaq 1:55a6170b404f 442
nexpaq 1:55a6170b404f 443 #endif /* MBEDTLS_SELF_TEST */
nexpaq 1:55a6170b404f 444
nexpaq 1:55a6170b404f 445 #endif /* MBEDTLS_SHA256_C */