Varun Bahl / CyaSSL-Encryp

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newSha256.c@2:d0516dc143b1, 2017-05-10 (annotated)

Committer:
vbahl2
Date:
Wed May 10 18:20:47 2017 +0000
Revision:
2:d0516dc143b1
updated

Who changed what in which revision?

UserRevisionLine numberNew contents of line
vbahl2 2:d0516dc143b1 1 /*
vbahl2 2:d0516dc143b1 2 * FIPS-180-2 compliant SHA-256 implementation
vbahl2 2:d0516dc143b1 3 *
vbahl2 2:d0516dc143b1 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
vbahl2 2:d0516dc143b1 5 * SPDX-License-Identifier: Apache-2.0
vbahl2 2:d0516dc143b1 6 *
vbahl2 2:d0516dc143b1 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
vbahl2 2:d0516dc143b1 8 * not use this file except in compliance with the License.
vbahl2 2:d0516dc143b1 9 * You may obtain a copy of the License at
vbahl2 2:d0516dc143b1 10 *
vbahl2 2:d0516dc143b1 11 * http://www.apache.org/licenses/LICENSE-2.0
vbahl2 2:d0516dc143b1 12 *
vbahl2 2:d0516dc143b1 13 * Unless required by applicable law or agreed to in writing, software
vbahl2 2:d0516dc143b1 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
vbahl2 2:d0516dc143b1 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
vbahl2 2:d0516dc143b1 16 * See the License for the specific language governing permissions and
vbahl2 2:d0516dc143b1 17 * limitations under the License.
vbahl2 2:d0516dc143b1 18 *
vbahl2 2:d0516dc143b1 19 * This file is part of mbed TLS (https://tls.mbed.org)
vbahl2 2:d0516dc143b1 20 */
vbahl2 2:d0516dc143b1 21 /*
vbahl2 2:d0516dc143b1 22 * The SHA-256 Secure Hash Standard was published by NIST in 2002.
vbahl2 2:d0516dc143b1 23 *
vbahl2 2:d0516dc143b1 24 * http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
vbahl2 2:d0516dc143b1 25 */
vbahl2 2:d0516dc143b1 26
vbahl2 2:d0516dc143b1 27 #include "newSha256.h"
vbahl2 2:d0516dc143b1 28
vbahl2 2:d0516dc143b1 29 #if !defined(MBEDTLS_CONFIG_FILE)
vbahl2 2:d0516dc143b1 30 #include "config.h"
vbahl2 2:d0516dc143b1 31 #else
vbahl2 2:d0516dc143b1 32 #include MBEDTLS_CONFIG_FILE
vbahl2 2:d0516dc143b1 33 #endif
vbahl2 2:d0516dc143b1 34
vbahl2 2:d0516dc143b1 35 //#if defined(MBEDTLS_SHA256_C)
vbahl2 2:d0516dc143b1 36
vbahl2 2:d0516dc143b1 37
vbahl2 2:d0516dc143b1 38
vbahl2 2:d0516dc143b1 39 #include <string.h>
vbahl2 2:d0516dc143b1 40
vbahl2 2:d0516dc143b1 41 //#if defined(MBEDTLS_SELF_TEST)
vbahl2 2:d0516dc143b1 42 #if defined(MBEDTLS_PLATFORM_C)
vbahl2 2:d0516dc143b1 43 #include "mbedtls/platform.h"
vbahl2 2:d0516dc143b1 44 #else
vbahl2 2:d0516dc143b1 45 #include <stdio.h>
vbahl2 2:d0516dc143b1 46 #include <stdlib.h>
vbahl2 2:d0516dc143b1 47 #define mbedtls_printf printf
vbahl2 2:d0516dc143b1 48 #define mbedtls_calloc calloc
vbahl2 2:d0516dc143b1 49 #define mbedtls_free free
vbahl2 2:d0516dc143b1 50 #endif /* MBEDTLS_PLATFORM_C */
vbahl2 2:d0516dc143b1 51 //#endif /* MBEDTLS_SELF_TEST */
vbahl2 2:d0516dc143b1 52
vbahl2 2:d0516dc143b1 53 //#if !defined(MBEDTLS_SHA256_ALT)
vbahl2 2:d0516dc143b1 54
vbahl2 2:d0516dc143b1 55 /* Implementation that should never be optimized out by the compiler */
vbahl2 2:d0516dc143b1 56 static void mbedtls_zeroize( void *v, size_t n ) {
vbahl2 2:d0516dc143b1 57 volatile unsigned char *p = v; while( n-- ) *p++ = 0;
vbahl2 2:d0516dc143b1 58 }
vbahl2 2:d0516dc143b1 59
vbahl2 2:d0516dc143b1 60 /*
vbahl2 2:d0516dc143b1 61 * 32-bit integer manipulation macros (big endian)
vbahl2 2:d0516dc143b1 62 */
vbahl2 2:d0516dc143b1 63 #ifndef GET_UINT32_BE
vbahl2 2:d0516dc143b1 64 #define GET_UINT32_BE(n,b,i) \
vbahl2 2:d0516dc143b1 65 do { \
vbahl2 2:d0516dc143b1 66 (n) = ( (uint32_t) (b)[(i) ] << 24 ) \
vbahl2 2:d0516dc143b1 67 | ( (uint32_t) (b)[(i) + 1] << 16 ) \
vbahl2 2:d0516dc143b1 68 | ( (uint32_t) (b)[(i) + 2] << 8 ) \
vbahl2 2:d0516dc143b1 69 | ( (uint32_t) (b)[(i) + 3] ); \
vbahl2 2:d0516dc143b1 70 } while( 0 )
vbahl2 2:d0516dc143b1 71 #endif
vbahl2 2:d0516dc143b1 72
vbahl2 2:d0516dc143b1 73 #ifndef PUT_UINT32_BE
vbahl2 2:d0516dc143b1 74 #define PUT_UINT32_BE(n,b,i) \
vbahl2 2:d0516dc143b1 75 do { \
vbahl2 2:d0516dc143b1 76 (b)[(i) ] = (unsigned char) ( (n) >> 24 ); \
vbahl2 2:d0516dc143b1 77 (b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \
vbahl2 2:d0516dc143b1 78 (b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \
vbahl2 2:d0516dc143b1 79 (b)[(i) + 3] = (unsigned char) ( (n) ); \
vbahl2 2:d0516dc143b1 80 } while( 0 )
vbahl2 2:d0516dc143b1 81 #endif
vbahl2 2:d0516dc143b1 82
vbahl2 2:d0516dc143b1 83 void mbedtls_sha256_init( mbedtls_sha256_context *ctx )
vbahl2 2:d0516dc143b1 84 {
vbahl2 2:d0516dc143b1 85 memset( ctx, 0, sizeof( mbedtls_sha256_context ) );
vbahl2 2:d0516dc143b1 86 }
vbahl2 2:d0516dc143b1 87
vbahl2 2:d0516dc143b1 88 void mbedtls_sha256_free( mbedtls_sha256_context *ctx )
vbahl2 2:d0516dc143b1 89 {
vbahl2 2:d0516dc143b1 90 if( ctx == NULL )
vbahl2 2:d0516dc143b1 91 return;
vbahl2 2:d0516dc143b1 92
vbahl2 2:d0516dc143b1 93 mbedtls_zeroize( ctx, sizeof( mbedtls_sha256_context ) );
vbahl2 2:d0516dc143b1 94 }
vbahl2 2:d0516dc143b1 95
vbahl2 2:d0516dc143b1 96 void mbedtls_sha256_clone( mbedtls_sha256_context *dst,
vbahl2 2:d0516dc143b1 97 const mbedtls_sha256_context *src )
vbahl2 2:d0516dc143b1 98 {
vbahl2 2:d0516dc143b1 99 *dst = *src;
vbahl2 2:d0516dc143b1 100 }
vbahl2 2:d0516dc143b1 101
vbahl2 2:d0516dc143b1 102 /*
vbahl2 2:d0516dc143b1 103 * SHA-256 context setup
vbahl2 2:d0516dc143b1 104 */
vbahl2 2:d0516dc143b1 105 void mbedtls_sha256_starts( mbedtls_sha256_context *ctx, int is224 )
vbahl2 2:d0516dc143b1 106 {
vbahl2 2:d0516dc143b1 107 ctx->total[0] = 0;
vbahl2 2:d0516dc143b1 108 ctx->total[1] = 0;
vbahl2 2:d0516dc143b1 109
vbahl2 2:d0516dc143b1 110 if( is224 == 0 )
vbahl2 2:d0516dc143b1 111 {
vbahl2 2:d0516dc143b1 112 /* SHA-256 */
vbahl2 2:d0516dc143b1 113 ctx->state[0] = 0x6A09E667;
vbahl2 2:d0516dc143b1 114 ctx->state[1] = 0xBB67AE85;
vbahl2 2:d0516dc143b1 115 ctx->state[2] = 0x3C6EF372;
vbahl2 2:d0516dc143b1 116 ctx->state[3] = 0xA54FF53A;
vbahl2 2:d0516dc143b1 117 ctx->state[4] = 0x510E527F;
vbahl2 2:d0516dc143b1 118 ctx->state[5] = 0x9B05688C;
vbahl2 2:d0516dc143b1 119 ctx->state[6] = 0x1F83D9AB;
vbahl2 2:d0516dc143b1 120 ctx->state[7] = 0x5BE0CD19;
vbahl2 2:d0516dc143b1 121 }
vbahl2 2:d0516dc143b1 122 else
vbahl2 2:d0516dc143b1 123 {
vbahl2 2:d0516dc143b1 124 /* SHA-224 */
vbahl2 2:d0516dc143b1 125 ctx->state[0] = 0xC1059ED8;
vbahl2 2:d0516dc143b1 126 ctx->state[1] = 0x367CD507;
vbahl2 2:d0516dc143b1 127 ctx->state[2] = 0x3070DD17;
vbahl2 2:d0516dc143b1 128 ctx->state[3] = 0xF70E5939;
vbahl2 2:d0516dc143b1 129 ctx->state[4] = 0xFFC00B31;
vbahl2 2:d0516dc143b1 130 ctx->state[5] = 0x68581511;
vbahl2 2:d0516dc143b1 131 ctx->state[6] = 0x64F98FA7;
vbahl2 2:d0516dc143b1 132 ctx->state[7] = 0xBEFA4FA4;
vbahl2 2:d0516dc143b1 133 }
vbahl2 2:d0516dc143b1 134
vbahl2 2:d0516dc143b1 135 ctx->is224 = is224;
vbahl2 2:d0516dc143b1 136 }
vbahl2 2:d0516dc143b1 137
vbahl2 2:d0516dc143b1 138 //#if !defined(MBEDTLS_SHA256_PROCESS_ALT)
vbahl2 2:d0516dc143b1 139 static const uint32_t K[] =
vbahl2 2:d0516dc143b1 140 {
vbahl2 2:d0516dc143b1 141 0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5,
vbahl2 2:d0516dc143b1 142 0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5,
vbahl2 2:d0516dc143b1 143 0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3,
vbahl2 2:d0516dc143b1 144 0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174,
vbahl2 2:d0516dc143b1 145 0xE49B69C1, 0xEFBE4786, 0x0FC19DC6, 0x240CA1CC,
vbahl2 2:d0516dc143b1 146 0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA,
vbahl2 2:d0516dc143b1 147 0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7,
vbahl2 2:d0516dc143b1 148 0xC6E00BF3, 0xD5A79147, 0x06CA6351, 0x14292967,
vbahl2 2:d0516dc143b1 149 0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13,
vbahl2 2:d0516dc143b1 150 0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85,
vbahl2 2:d0516dc143b1 151 0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3,
vbahl2 2:d0516dc143b1 152 0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070,
vbahl2 2:d0516dc143b1 153 0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5,
vbahl2 2:d0516dc143b1 154 0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3,
vbahl2 2:d0516dc143b1 155 0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208,
vbahl2 2:d0516dc143b1 156 0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2,
vbahl2 2:d0516dc143b1 157 };
vbahl2 2:d0516dc143b1 158
vbahl2 2:d0516dc143b1 159 #define SHR(x,n) ((x & 0xFFFFFFFF) >> n)
vbahl2 2:d0516dc143b1 160 #define ROTR(x,n) (SHR(x,n) | (x << (32 - n)))
vbahl2 2:d0516dc143b1 161
vbahl2 2:d0516dc143b1 162 #define S0(x) (ROTR(x, 7) ^ ROTR(x,18) ^ SHR(x, 3))
vbahl2 2:d0516dc143b1 163 #define S1(x) (ROTR(x,17) ^ ROTR(x,19) ^ SHR(x,10))
vbahl2 2:d0516dc143b1 164
vbahl2 2:d0516dc143b1 165 #define S2(x) (ROTR(x, 2) ^ ROTR(x,13) ^ ROTR(x,22))
vbahl2 2:d0516dc143b1 166 #define S3(x) (ROTR(x, 6) ^ ROTR(x,11) ^ ROTR(x,25))
vbahl2 2:d0516dc143b1 167
vbahl2 2:d0516dc143b1 168 #define F0(x,y,z) ((x & y) | (z & (x | y)))
vbahl2 2:d0516dc143b1 169 #define F1(x,y,z) (z ^ (x & (y ^ z)))
vbahl2 2:d0516dc143b1 170
vbahl2 2:d0516dc143b1 171 #define R(t) \
vbahl2 2:d0516dc143b1 172 ( \
vbahl2 2:d0516dc143b1 173 W[t] = S1(W[t - 2]) + W[t - 7] + \
vbahl2 2:d0516dc143b1 174 S0(W[t - 15]) + W[t - 16] \
vbahl2 2:d0516dc143b1 175 )
vbahl2 2:d0516dc143b1 176
vbahl2 2:d0516dc143b1 177 #define P(a,b,c,d,e,f,g,h,x,K) \
vbahl2 2:d0516dc143b1 178 { \
vbahl2 2:d0516dc143b1 179 temp1 = h + S3(e) + F1(e,f,g) + K + x; \
vbahl2 2:d0516dc143b1 180 temp2 = S2(a) + F0(a,b,c); \
vbahl2 2:d0516dc143b1 181 d += temp1; h = temp1 + temp2; \
vbahl2 2:d0516dc143b1 182 }
vbahl2 2:d0516dc143b1 183
vbahl2 2:d0516dc143b1 184 void mbedtls_sha256_process( mbedtls_sha256_context *ctx, const unsigned char data[64] )
vbahl2 2:d0516dc143b1 185 {
vbahl2 2:d0516dc143b1 186 uint32_t temp1, temp2, W[64];
vbahl2 2:d0516dc143b1 187 uint32_t A[8];
vbahl2 2:d0516dc143b1 188 unsigned int i;
vbahl2 2:d0516dc143b1 189
vbahl2 2:d0516dc143b1 190 for( i = 0; i < 8; i++ )
vbahl2 2:d0516dc143b1 191 A[i] = ctx->state[i];
vbahl2 2:d0516dc143b1 192
vbahl2 2:d0516dc143b1 193 #if defined(MBEDTLS_SHA256_SMALLER)
vbahl2 2:d0516dc143b1 194 for( i = 0; i < 64; i++ )
vbahl2 2:d0516dc143b1 195 {
vbahl2 2:d0516dc143b1 196 if( i < 16 )
vbahl2 2:d0516dc143b1 197 GET_UINT32_BE( W[i], data, 4 * i );
vbahl2 2:d0516dc143b1 198 else
vbahl2 2:d0516dc143b1 199 R( i );
vbahl2 2:d0516dc143b1 200
vbahl2 2:d0516dc143b1 201 P( A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], W[i], K[i] );
vbahl2 2:d0516dc143b1 202
vbahl2 2:d0516dc143b1 203 temp1 = A[7]; A[7] = A[6]; A[6] = A[5]; A[5] = A[4]; A[4] = A[3];
vbahl2 2:d0516dc143b1 204 A[3] = A[2]; A[2] = A[1]; A[1] = A[0]; A[0] = temp1;
vbahl2 2:d0516dc143b1 205 }
vbahl2 2:d0516dc143b1 206 #else /* MBEDTLS_SHA256_SMALLER */
vbahl2 2:d0516dc143b1 207 for( i = 0; i < 16; i++ )
vbahl2 2:d0516dc143b1 208 GET_UINT32_BE( W[i], data, 4 * i );
vbahl2 2:d0516dc143b1 209
vbahl2 2:d0516dc143b1 210 for( i = 0; i < 16; i += 8 )
vbahl2 2:d0516dc143b1 211 {
vbahl2 2:d0516dc143b1 212 P( A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], W[i+0], K[i+0] );
vbahl2 2:d0516dc143b1 213 P( A[7], A[0], A[1], A[2], A[3], A[4], A[5], A[6], W[i+1], K[i+1] );
vbahl2 2:d0516dc143b1 214 P( A[6], A[7], A[0], A[1], A[2], A[3], A[4], A[5], W[i+2], K[i+2] );
vbahl2 2:d0516dc143b1 215 P( A[5], A[6], A[7], A[0], A[1], A[2], A[3], A[4], W[i+3], K[i+3] );
vbahl2 2:d0516dc143b1 216 P( A[4], A[5], A[6], A[7], A[0], A[1], A[2], A[3], W[i+4], K[i+4] );
vbahl2 2:d0516dc143b1 217 P( A[3], A[4], A[5], A[6], A[7], A[0], A[1], A[2], W[i+5], K[i+5] );
vbahl2 2:d0516dc143b1 218 P( A[2], A[3], A[4], A[5], A[6], A[7], A[0], A[1], W[i+6], K[i+6] );
vbahl2 2:d0516dc143b1 219 P( A[1], A[2], A[3], A[4], A[5], A[6], A[7], A[0], W[i+7], K[i+7] );
vbahl2 2:d0516dc143b1 220 }
vbahl2 2:d0516dc143b1 221
vbahl2 2:d0516dc143b1 222 for( i = 16; i < 64; i += 8 )
vbahl2 2:d0516dc143b1 223 {
vbahl2 2:d0516dc143b1 224 P( A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], R(i+0), K[i+0] );
vbahl2 2:d0516dc143b1 225 P( A[7], A[0], A[1], A[2], A[3], A[4], A[5], A[6], R(i+1), K[i+1] );
vbahl2 2:d0516dc143b1 226 P( A[6], A[7], A[0], A[1], A[2], A[3], A[4], A[5], R(i+2), K[i+2] );
vbahl2 2:d0516dc143b1 227 P( A[5], A[6], A[7], A[0], A[1], A[2], A[3], A[4], R(i+3), K[i+3] );
vbahl2 2:d0516dc143b1 228 P( A[4], A[5], A[6], A[7], A[0], A[1], A[2], A[3], R(i+4), K[i+4] );
vbahl2 2:d0516dc143b1 229 P( A[3], A[4], A[5], A[6], A[7], A[0], A[1], A[2], R(i+5), K[i+5] );
vbahl2 2:d0516dc143b1 230 P( A[2], A[3], A[4], A[5], A[6], A[7], A[0], A[1], R(i+6), K[i+6] );
vbahl2 2:d0516dc143b1 231 P( A[1], A[2], A[3], A[4], A[5], A[6], A[7], A[0], R(i+7), K[i+7] );
vbahl2 2:d0516dc143b1 232 }
vbahl2 2:d0516dc143b1 233 #endif /* MBEDTLS_SHA256_SMALLER */
vbahl2 2:d0516dc143b1 234
vbahl2 2:d0516dc143b1 235 for( i = 0; i < 8; i++ )
vbahl2 2:d0516dc143b1 236 ctx->state[i] += A[i];
vbahl2 2:d0516dc143b1 237 }
vbahl2 2:d0516dc143b1 238 //#endif /* !MBEDTLS_SHA256_PROCESS_ALT */
vbahl2 2:d0516dc143b1 239
vbahl2 2:d0516dc143b1 240 /*
vbahl2 2:d0516dc143b1 241 * SHA-256 process buffer
vbahl2 2:d0516dc143b1 242 */
vbahl2 2:d0516dc143b1 243 void mbedtls_sha256_update( mbedtls_sha256_context *ctx, const unsigned char *input,
vbahl2 2:d0516dc143b1 244 size_t ilen )
vbahl2 2:d0516dc143b1 245 {
vbahl2 2:d0516dc143b1 246 size_t fill;
vbahl2 2:d0516dc143b1 247 uint32_t left;
vbahl2 2:d0516dc143b1 248
vbahl2 2:d0516dc143b1 249 if( ilen == 0 )
vbahl2 2:d0516dc143b1 250 return;
vbahl2 2:d0516dc143b1 251
vbahl2 2:d0516dc143b1 252 left = ctx->total[0] & 0x3F;
vbahl2 2:d0516dc143b1 253 fill = 64 - left;
vbahl2 2:d0516dc143b1 254
vbahl2 2:d0516dc143b1 255 ctx->total[0] += (uint32_t) ilen;
vbahl2 2:d0516dc143b1 256 ctx->total[0] &= 0xFFFFFFFF;
vbahl2 2:d0516dc143b1 257
vbahl2 2:d0516dc143b1 258 if( ctx->total[0] < (uint32_t) ilen )
vbahl2 2:d0516dc143b1 259 ctx->total[1]++;
vbahl2 2:d0516dc143b1 260
vbahl2 2:d0516dc143b1 261 if( left && ilen >= fill )
vbahl2 2:d0516dc143b1 262 {
vbahl2 2:d0516dc143b1 263 memcpy( (void *) (ctx->buffer + left), input, fill );
vbahl2 2:d0516dc143b1 264 mbedtls_sha256_process( ctx, ctx->buffer );
vbahl2 2:d0516dc143b1 265 input += fill;
vbahl2 2:d0516dc143b1 266 ilen -= fill;
vbahl2 2:d0516dc143b1 267 left = 0;
vbahl2 2:d0516dc143b1 268 }
vbahl2 2:d0516dc143b1 269
vbahl2 2:d0516dc143b1 270 while( ilen >= 64 )
vbahl2 2:d0516dc143b1 271 {
vbahl2 2:d0516dc143b1 272 mbedtls_sha256_process( ctx, input );
vbahl2 2:d0516dc143b1 273 input += 64;
vbahl2 2:d0516dc143b1 274 ilen -= 64;
vbahl2 2:d0516dc143b1 275 }
vbahl2 2:d0516dc143b1 276
vbahl2 2:d0516dc143b1 277 if( ilen > 0 )
vbahl2 2:d0516dc143b1 278 memcpy( (void *) (ctx->buffer + left), input, ilen );
vbahl2 2:d0516dc143b1 279 }
vbahl2 2:d0516dc143b1 280
vbahl2 2:d0516dc143b1 281 static const unsigned char sha256_padding[64] =
vbahl2 2:d0516dc143b1 282 {
vbahl2 2:d0516dc143b1 283 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
vbahl2 2:d0516dc143b1 284 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
vbahl2 2:d0516dc143b1 285 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
vbahl2 2:d0516dc143b1 286 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
vbahl2 2:d0516dc143b1 287 };
vbahl2 2:d0516dc143b1 288
vbahl2 2:d0516dc143b1 289 /*
vbahl2 2:d0516dc143b1 290 * SHA-256 final digest
vbahl2 2:d0516dc143b1 291 */
vbahl2 2:d0516dc143b1 292 void mbedtls_sha256_finish( mbedtls_sha256_context *ctx, unsigned char output[32] )
vbahl2 2:d0516dc143b1 293 {
vbahl2 2:d0516dc143b1 294 uint32_t last, padn;
vbahl2 2:d0516dc143b1 295 uint32_t high, low;
vbahl2 2:d0516dc143b1 296 unsigned char msglen[8];
vbahl2 2:d0516dc143b1 297
vbahl2 2:d0516dc143b1 298 high = ( ctx->total[0] >> 29 )
vbahl2 2:d0516dc143b1 299 | ( ctx->total[1] << 3 );
vbahl2 2:d0516dc143b1 300 low = ( ctx->total[0] << 3 );
vbahl2 2:d0516dc143b1 301
vbahl2 2:d0516dc143b1 302 PUT_UINT32_BE( high, msglen, 0 );
vbahl2 2:d0516dc143b1 303 PUT_UINT32_BE( low, msglen, 4 );
vbahl2 2:d0516dc143b1 304
vbahl2 2:d0516dc143b1 305 last = ctx->total[0] & 0x3F;
vbahl2 2:d0516dc143b1 306 padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );
vbahl2 2:d0516dc143b1 307
vbahl2 2:d0516dc143b1 308 mbedtls_sha256_update( ctx, sha256_padding, padn );
vbahl2 2:d0516dc143b1 309 mbedtls_sha256_update( ctx, msglen, 8 );
vbahl2 2:d0516dc143b1 310
vbahl2 2:d0516dc143b1 311 PUT_UINT32_BE( ctx->state[0], output, 0 );
vbahl2 2:d0516dc143b1 312 PUT_UINT32_BE( ctx->state[1], output, 4 );
vbahl2 2:d0516dc143b1 313 PUT_UINT32_BE( ctx->state[2], output, 8 );
vbahl2 2:d0516dc143b1 314 PUT_UINT32_BE( ctx->state[3], output, 12 );
vbahl2 2:d0516dc143b1 315 PUT_UINT32_BE( ctx->state[4], output, 16 );
vbahl2 2:d0516dc143b1 316 PUT_UINT32_BE( ctx->state[5], output, 20 );
vbahl2 2:d0516dc143b1 317 PUT_UINT32_BE( ctx->state[6], output, 24 );
vbahl2 2:d0516dc143b1 318
vbahl2 2:d0516dc143b1 319 if( ctx->is224 == 0 )
vbahl2 2:d0516dc143b1 320 PUT_UINT32_BE( ctx->state[7], output, 28 );
vbahl2 2:d0516dc143b1 321 }
vbahl2 2:d0516dc143b1 322
vbahl2 2:d0516dc143b1 323 //#endif /* !MBEDTLS_SHA256_ALT */
vbahl2 2:d0516dc143b1 324
vbahl2 2:d0516dc143b1 325 /*
vbahl2 2:d0516dc143b1 326 * output = SHA-256( input buffer )
vbahl2 2:d0516dc143b1 327 */
vbahl2 2:d0516dc143b1 328 void mbedtls_sha256( const unsigned char *input, size_t ilen,
vbahl2 2:d0516dc143b1 329 unsigned char output[32], int is224 )
vbahl2 2:d0516dc143b1 330 {
vbahl2 2:d0516dc143b1 331 mbedtls_sha256_context ctx;
vbahl2 2:d0516dc143b1 332
vbahl2 2:d0516dc143b1 333 mbedtls_sha256_init( &ctx );
vbahl2 2:d0516dc143b1 334 mbedtls_sha256_starts( &ctx, is224 );
vbahl2 2:d0516dc143b1 335 mbedtls_sha256_update( &ctx, input, ilen );
vbahl2 2:d0516dc143b1 336 mbedtls_sha256_finish( &ctx, output );
vbahl2 2:d0516dc143b1 337 mbedtls_sha256_free( &ctx );
vbahl2 2:d0516dc143b1 338 }
vbahl2 2:d0516dc143b1 339
vbahl2 2:d0516dc143b1 340 //#if defined(MBEDTLS_SELF_TEST)
vbahl2 2:d0516dc143b1 341 /*
vbahl2 2:d0516dc143b1 342 * FIPS-180-2 test vectors
vbahl2 2:d0516dc143b1 343 */
vbahl2 2:d0516dc143b1 344 static const unsigned char sha256_test_buf[3][57] =
vbahl2 2:d0516dc143b1 345 {
vbahl2 2:d0516dc143b1 346 { "abc" },
vbahl2 2:d0516dc143b1 347 { "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" },
vbahl2 2:d0516dc143b1 348 { "" }
vbahl2 2:d0516dc143b1 349 };
vbahl2 2:d0516dc143b1 350
vbahl2 2:d0516dc143b1 351 static const int sha256_test_buflen[3] =
vbahl2 2:d0516dc143b1 352 {
vbahl2 2:d0516dc143b1 353 3, 56, 1000
vbahl2 2:d0516dc143b1 354 };
vbahl2 2:d0516dc143b1 355
vbahl2 2:d0516dc143b1 356 static const unsigned char sha256_test_sum[6][32] =
vbahl2 2:d0516dc143b1 357 {
vbahl2 2:d0516dc143b1 358 /*
vbahl2 2:d0516dc143b1 359 * SHA-224 test vectors
vbahl2 2:d0516dc143b1 360 */
vbahl2 2:d0516dc143b1 361 { 0x23, 0x09, 0x7D, 0x22, 0x34, 0x05, 0xD8, 0x22,
vbahl2 2:d0516dc143b1 362 0x86, 0x42, 0xA4, 0x77, 0xBD, 0xA2, 0x55, 0xB3,
vbahl2 2:d0516dc143b1 363 0x2A, 0xAD, 0xBC, 0xE4, 0xBD, 0xA0, 0xB3, 0xF7,
vbahl2 2:d0516dc143b1 364 0xE3, 0x6C, 0x9D, 0xA7 },
vbahl2 2:d0516dc143b1 365 { 0x75, 0x38, 0x8B, 0x16, 0x51, 0x27, 0x76, 0xCC,
vbahl2 2:d0516dc143b1 366 0x5D, 0xBA, 0x5D, 0xA1, 0xFD, 0x89, 0x01, 0x50,
vbahl2 2:d0516dc143b1 367 0xB0, 0xC6, 0x45, 0x5C, 0xB4, 0xF5, 0x8B, 0x19,
vbahl2 2:d0516dc143b1 368 0x52, 0x52, 0x25, 0x25 },
vbahl2 2:d0516dc143b1 369 { 0x20, 0x79, 0x46, 0x55, 0x98, 0x0C, 0x91, 0xD8,
vbahl2 2:d0516dc143b1 370 0xBB, 0xB4, 0xC1, 0xEA, 0x97, 0x61, 0x8A, 0x4B,
vbahl2 2:d0516dc143b1 371 0xF0, 0x3F, 0x42, 0x58, 0x19, 0x48, 0xB2, 0xEE,
vbahl2 2:d0516dc143b1 372 0x4E, 0xE7, 0xAD, 0x67 },
vbahl2 2:d0516dc143b1 373
vbahl2 2:d0516dc143b1 374 /*
vbahl2 2:d0516dc143b1 375 * SHA-256 test vectors
vbahl2 2:d0516dc143b1 376 */
vbahl2 2:d0516dc143b1 377 { 0xBA, 0x78, 0x16, 0xBF, 0x8F, 0x01, 0xCF, 0xEA,
vbahl2 2:d0516dc143b1 378 0x41, 0x41, 0x40, 0xDE, 0x5D, 0xAE, 0x22, 0x23,
vbahl2 2:d0516dc143b1 379 0xB0, 0x03, 0x61, 0xA3, 0x96, 0x17, 0x7A, 0x9C,
vbahl2 2:d0516dc143b1 380 0xB4, 0x10, 0xFF, 0x61, 0xF2, 0x00, 0x15, 0xAD },
vbahl2 2:d0516dc143b1 381 { 0x24, 0x8D, 0x6A, 0x61, 0xD2, 0x06, 0x38, 0xB8,
vbahl2 2:d0516dc143b1 382 0xE5, 0xC0, 0x26, 0x93, 0x0C, 0x3E, 0x60, 0x39,
vbahl2 2:d0516dc143b1 383 0xA3, 0x3C, 0xE4, 0x59, 0x64, 0xFF, 0x21, 0x67,
vbahl2 2:d0516dc143b1 384 0xF6, 0xEC, 0xED, 0xD4, 0x19, 0xDB, 0x06, 0xC1 },
vbahl2 2:d0516dc143b1 385 { 0xCD, 0xC7, 0x6E, 0x5C, 0x99, 0x14, 0xFB, 0x92,
vbahl2 2:d0516dc143b1 386 0x81, 0xA1, 0xC7, 0xE2, 0x84, 0xD7, 0x3E, 0x67,
vbahl2 2:d0516dc143b1 387 0xF1, 0x80, 0x9A, 0x48, 0xA4, 0x97, 0x20, 0x0E,
vbahl2 2:d0516dc143b1 388 0x04, 0x6D, 0x39, 0xCC, 0xC7, 0x11, 0x2C, 0xD0 }
vbahl2 2:d0516dc143b1 389 };
vbahl2 2:d0516dc143b1 390
vbahl2 2:d0516dc143b1 391 /*
vbahl2 2:d0516dc143b1 392 * Checkup routine
vbahl2 2:d0516dc143b1 393 */
vbahl2 2:d0516dc143b1 394 int mbedtls_sha256_self_test( int verbose )
vbahl2 2:d0516dc143b1 395 {
vbahl2 2:d0516dc143b1 396 int i, j, k, buflen, ret = 0;
vbahl2 2:d0516dc143b1 397 unsigned char *buf;
vbahl2 2:d0516dc143b1 398 unsigned char sha256sum[32];
vbahl2 2:d0516dc143b1 399 mbedtls_sha256_context ctx;
vbahl2 2:d0516dc143b1 400
vbahl2 2:d0516dc143b1 401 buf = mbedtls_calloc( 1024, sizeof(unsigned char) );
vbahl2 2:d0516dc143b1 402 if( NULL == buf )
vbahl2 2:d0516dc143b1 403 {
vbahl2 2:d0516dc143b1 404 if( verbose != 0 )
vbahl2 2:d0516dc143b1 405 mbedtls_printf( "Buffer allocation failed\n" );
vbahl2 2:d0516dc143b1 406
vbahl2 2:d0516dc143b1 407 return( 1 );
vbahl2 2:d0516dc143b1 408 }
vbahl2 2:d0516dc143b1 409
vbahl2 2:d0516dc143b1 410 mbedtls_sha256_init( &ctx );
vbahl2 2:d0516dc143b1 411
vbahl2 2:d0516dc143b1 412 for( i = 0; i < 6; i++ )
vbahl2 2:d0516dc143b1 413 {
vbahl2 2:d0516dc143b1 414 j = i % 3;
vbahl2 2:d0516dc143b1 415 k = i < 3;
vbahl2 2:d0516dc143b1 416
vbahl2 2:d0516dc143b1 417 if( verbose != 0 )
vbahl2 2:d0516dc143b1 418 mbedtls_printf( " SHA-%d test #%d: ", 256 - k * 32, j + 1 );
vbahl2 2:d0516dc143b1 419
vbahl2 2:d0516dc143b1 420 mbedtls_sha256_starts( &ctx, k );
vbahl2 2:d0516dc143b1 421
vbahl2 2:d0516dc143b1 422 if( j == 2 )
vbahl2 2:d0516dc143b1 423 {
vbahl2 2:d0516dc143b1 424 memset( buf, 'a', buflen = 1000 );
vbahl2 2:d0516dc143b1 425
vbahl2 2:d0516dc143b1 426 for( j = 0; j < 1000; j++ )
vbahl2 2:d0516dc143b1 427 mbedtls_sha256_update( &ctx, buf, buflen );
vbahl2 2:d0516dc143b1 428 }
vbahl2 2:d0516dc143b1 429 else
vbahl2 2:d0516dc143b1 430 mbedtls_sha256_update( &ctx, sha256_test_buf[j],
vbahl2 2:d0516dc143b1 431 sha256_test_buflen[j] );
vbahl2 2:d0516dc143b1 432
vbahl2 2:d0516dc143b1 433 mbedtls_sha256_finish( &ctx, sha256sum );
vbahl2 2:d0516dc143b1 434
vbahl2 2:d0516dc143b1 435 if( memcmp( sha256sum, sha256_test_sum[i], 32 - k * 4 ) != 0 )
vbahl2 2:d0516dc143b1 436 {
vbahl2 2:d0516dc143b1 437 if( verbose != 0 )
vbahl2 2:d0516dc143b1 438 mbedtls_printf( "failed\n" );
vbahl2 2:d0516dc143b1 439
vbahl2 2:d0516dc143b1 440 ret = 1;
vbahl2 2:d0516dc143b1 441 goto exit;
vbahl2 2:d0516dc143b1 442 }
vbahl2 2:d0516dc143b1 443
vbahl2 2:d0516dc143b1 444 if( verbose != 0 )
vbahl2 2:d0516dc143b1 445 mbedtls_printf( "passed\n" );
vbahl2 2:d0516dc143b1 446 }
vbahl2 2:d0516dc143b1 447
vbahl2 2:d0516dc143b1 448 if( verbose != 0 )
vbahl2 2:d0516dc143b1 449 mbedtls_printf( "\n" );
vbahl2 2:d0516dc143b1 450
vbahl2 2:d0516dc143b1 451 exit:
vbahl2 2:d0516dc143b1 452 mbedtls_sha256_free( &ctx );
vbahl2 2:d0516dc143b1 453 mbedtls_free( buf );
vbahl2 2:d0516dc143b1 454
vbahl2 2:d0516dc143b1 455 return( ret );
vbahl2 2:d0516dc143b1 456 }
vbahl2 2:d0516dc143b1 457
vbahl2 2:d0516dc143b1 458 //#endif /* MBEDTLS_SELF_TEST */
vbahl2 2:d0516dc143b1 459
vbahl2 2:d0516dc143b1 460 //#endif /* MBEDTLS_SHA256_C */