Timothy Beight / Mbed 2 deprecated 6_songs-from-the-cloud

This is a fork due to permission issues

Dependencies:   mbed Socket lwip-eth lwip-sys lwip

Fork of 6_songs-from-the-cloud by MakingMusicWorkshop

mbed-client/mbedtls/source/sha256.c@0:f7c60d3e7b8a, 2016-05-18 (annotated)

Committer:
maclobdell
Date:
Wed May 18 19:06:32 2016 +0000
Revision:
0:f7c60d3e7b8a
clean version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
maclobdell 0:f7c60d3e7b8a 1 /*
maclobdell 0:f7c60d3e7b8a 2 * FIPS-180-2 compliant SHA-256 implementation
maclobdell 0:f7c60d3e7b8a 3 *
maclobdell 0:f7c60d3e7b8a 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
maclobdell 0:f7c60d3e7b8a 5 * SPDX-License-Identifier: Apache-2.0
maclobdell 0:f7c60d3e7b8a 6 *
maclobdell 0:f7c60d3e7b8a 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
maclobdell 0:f7c60d3e7b8a 8 * not use this file except in compliance with the License.
maclobdell 0:f7c60d3e7b8a 9 * You may obtain a copy of the License at
maclobdell 0:f7c60d3e7b8a 10 *
maclobdell 0:f7c60d3e7b8a 11 * http://www.apache.org/licenses/LICENSE-2.0
maclobdell 0:f7c60d3e7b8a 12 *
maclobdell 0:f7c60d3e7b8a 13 * Unless required by applicable law or agreed to in writing, software
maclobdell 0:f7c60d3e7b8a 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
maclobdell 0:f7c60d3e7b8a 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
maclobdell 0:f7c60d3e7b8a 16 * See the License for the specific language governing permissions and
maclobdell 0:f7c60d3e7b8a 17 * limitations under the License.
maclobdell 0:f7c60d3e7b8a 18 *
maclobdell 0:f7c60d3e7b8a 19 * This file is part of mbed TLS (https://tls.mbed.org)
maclobdell 0:f7c60d3e7b8a 20 */
maclobdell 0:f7c60d3e7b8a 21 /*
maclobdell 0:f7c60d3e7b8a 22 * The SHA-256 Secure Hash Standard was published by NIST in 2002.
maclobdell 0:f7c60d3e7b8a 23 *
maclobdell 0:f7c60d3e7b8a 24 * http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
maclobdell 0:f7c60d3e7b8a 25 */
maclobdell 0:f7c60d3e7b8a 26
maclobdell 0:f7c60d3e7b8a 27 #if !defined(MBEDTLS_CONFIG_FILE)
maclobdell 0:f7c60d3e7b8a 28 #include "mbedtls/config.h"
maclobdell 0:f7c60d3e7b8a 29 #else
maclobdell 0:f7c60d3e7b8a 30 #include MBEDTLS_CONFIG_FILE
maclobdell 0:f7c60d3e7b8a 31 #endif
maclobdell 0:f7c60d3e7b8a 32
maclobdell 0:f7c60d3e7b8a 33 #if defined(MBEDTLS_SHA256_C)
maclobdell 0:f7c60d3e7b8a 34
maclobdell 0:f7c60d3e7b8a 35 #include "mbedtls/sha256.h"
maclobdell 0:f7c60d3e7b8a 36
maclobdell 0:f7c60d3e7b8a 37 #include <string.h>
maclobdell 0:f7c60d3e7b8a 38
maclobdell 0:f7c60d3e7b8a 39 #if defined(MBEDTLS_SELF_TEST)
maclobdell 0:f7c60d3e7b8a 40 #if defined(MBEDTLS_PLATFORM_C)
maclobdell 0:f7c60d3e7b8a 41 #include "mbedtls/platform.h"
maclobdell 0:f7c60d3e7b8a 42 #else
maclobdell 0:f7c60d3e7b8a 43 #include <stdio.h>
maclobdell 0:f7c60d3e7b8a 44 #define mbedtls_printf printf
maclobdell 0:f7c60d3e7b8a 45 #endif /* MBEDTLS_PLATFORM_C */
maclobdell 0:f7c60d3e7b8a 46 #endif /* MBEDTLS_SELF_TEST */
maclobdell 0:f7c60d3e7b8a 47
maclobdell 0:f7c60d3e7b8a 48 #if !defined(MBEDTLS_SHA256_ALT)
maclobdell 0:f7c60d3e7b8a 49
maclobdell 0:f7c60d3e7b8a 50 /* Implementation that should never be optimized out by the compiler */
maclobdell 0:f7c60d3e7b8a 51 static void mbedtls_zeroize( void *v, size_t n ) {
maclobdell 0:f7c60d3e7b8a 52 volatile unsigned char *p = v; while( n-- ) *p++ = 0;
maclobdell 0:f7c60d3e7b8a 53 }
maclobdell 0:f7c60d3e7b8a 54
maclobdell 0:f7c60d3e7b8a 55 /*
maclobdell 0:f7c60d3e7b8a 56 * 32-bit integer manipulation macros (big endian)
maclobdell 0:f7c60d3e7b8a 57 */
maclobdell 0:f7c60d3e7b8a 58 #ifndef GET_UINT32_BE
maclobdell 0:f7c60d3e7b8a 59 #define GET_UINT32_BE(n,b,i) \
maclobdell 0:f7c60d3e7b8a 60 do { \
maclobdell 0:f7c60d3e7b8a 61 (n) = ( (uint32_t) (b)[(i) ] << 24 ) \
maclobdell 0:f7c60d3e7b8a 62 | ( (uint32_t) (b)[(i) + 1] << 16 ) \
maclobdell 0:f7c60d3e7b8a 63 | ( (uint32_t) (b)[(i) + 2] << 8 ) \
maclobdell 0:f7c60d3e7b8a 64 | ( (uint32_t) (b)[(i) + 3] ); \
maclobdell 0:f7c60d3e7b8a 65 } while( 0 )
maclobdell 0:f7c60d3e7b8a 66 #endif
maclobdell 0:f7c60d3e7b8a 67
maclobdell 0:f7c60d3e7b8a 68 #ifndef PUT_UINT32_BE
maclobdell 0:f7c60d3e7b8a 69 #define PUT_UINT32_BE(n,b,i) \
maclobdell 0:f7c60d3e7b8a 70 do { \
maclobdell 0:f7c60d3e7b8a 71 (b)[(i) ] = (unsigned char) ( (n) >> 24 ); \
maclobdell 0:f7c60d3e7b8a 72 (b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \
maclobdell 0:f7c60d3e7b8a 73 (b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \
maclobdell 0:f7c60d3e7b8a 74 (b)[(i) + 3] = (unsigned char) ( (n) ); \
maclobdell 0:f7c60d3e7b8a 75 } while( 0 )
maclobdell 0:f7c60d3e7b8a 76 #endif
maclobdell 0:f7c60d3e7b8a 77
maclobdell 0:f7c60d3e7b8a 78 void mbedtls_sha256_init( mbedtls_sha256_context *ctx )
maclobdell 0:f7c60d3e7b8a 79 {
maclobdell 0:f7c60d3e7b8a 80 memset( ctx, 0, sizeof( mbedtls_sha256_context ) );
maclobdell 0:f7c60d3e7b8a 81 }
maclobdell 0:f7c60d3e7b8a 82
maclobdell 0:f7c60d3e7b8a 83 void mbedtls_sha256_free( mbedtls_sha256_context *ctx )
maclobdell 0:f7c60d3e7b8a 84 {
maclobdell 0:f7c60d3e7b8a 85 if( ctx == NULL )
maclobdell 0:f7c60d3e7b8a 86 return;
maclobdell 0:f7c60d3e7b8a 87
maclobdell 0:f7c60d3e7b8a 88 mbedtls_zeroize( ctx, sizeof( mbedtls_sha256_context ) );
maclobdell 0:f7c60d3e7b8a 89 }
maclobdell 0:f7c60d3e7b8a 90
maclobdell 0:f7c60d3e7b8a 91 void mbedtls_sha256_clone( mbedtls_sha256_context *dst,
maclobdell 0:f7c60d3e7b8a 92 const mbedtls_sha256_context *src )
maclobdell 0:f7c60d3e7b8a 93 {
maclobdell 0:f7c60d3e7b8a 94 *dst = *src;
maclobdell 0:f7c60d3e7b8a 95 }
maclobdell 0:f7c60d3e7b8a 96
maclobdell 0:f7c60d3e7b8a 97 /*
maclobdell 0:f7c60d3e7b8a 98 * SHA-256 context setup
maclobdell 0:f7c60d3e7b8a 99 */
maclobdell 0:f7c60d3e7b8a 100 void mbedtls_sha256_starts( mbedtls_sha256_context *ctx, int is224 )
maclobdell 0:f7c60d3e7b8a 101 {
maclobdell 0:f7c60d3e7b8a 102 ctx->total[0] = 0;
maclobdell 0:f7c60d3e7b8a 103 ctx->total[1] = 0;
maclobdell 0:f7c60d3e7b8a 104
maclobdell 0:f7c60d3e7b8a 105 if( is224 == 0 )
maclobdell 0:f7c60d3e7b8a 106 {
maclobdell 0:f7c60d3e7b8a 107 /* SHA-256 */
maclobdell 0:f7c60d3e7b8a 108 ctx->state[0] = 0x6A09E667;
maclobdell 0:f7c60d3e7b8a 109 ctx->state[1] = 0xBB67AE85;
maclobdell 0:f7c60d3e7b8a 110 ctx->state[2] = 0x3C6EF372;
maclobdell 0:f7c60d3e7b8a 111 ctx->state[3] = 0xA54FF53A;
maclobdell 0:f7c60d3e7b8a 112 ctx->state[4] = 0x510E527F;
maclobdell 0:f7c60d3e7b8a 113 ctx->state[5] = 0x9B05688C;
maclobdell 0:f7c60d3e7b8a 114 ctx->state[6] = 0x1F83D9AB;
maclobdell 0:f7c60d3e7b8a 115 ctx->state[7] = 0x5BE0CD19;
maclobdell 0:f7c60d3e7b8a 116 }
maclobdell 0:f7c60d3e7b8a 117 else
maclobdell 0:f7c60d3e7b8a 118 {
maclobdell 0:f7c60d3e7b8a 119 /* SHA-224 */
maclobdell 0:f7c60d3e7b8a 120 ctx->state[0] = 0xC1059ED8;
maclobdell 0:f7c60d3e7b8a 121 ctx->state[1] = 0x367CD507;
maclobdell 0:f7c60d3e7b8a 122 ctx->state[2] = 0x3070DD17;
maclobdell 0:f7c60d3e7b8a 123 ctx->state[3] = 0xF70E5939;
maclobdell 0:f7c60d3e7b8a 124 ctx->state[4] = 0xFFC00B31;
maclobdell 0:f7c60d3e7b8a 125 ctx->state[5] = 0x68581511;
maclobdell 0:f7c60d3e7b8a 126 ctx->state[6] = 0x64F98FA7;
maclobdell 0:f7c60d3e7b8a 127 ctx->state[7] = 0xBEFA4FA4;
maclobdell 0:f7c60d3e7b8a 128 }
maclobdell 0:f7c60d3e7b8a 129
maclobdell 0:f7c60d3e7b8a 130 ctx->is224 = is224;
maclobdell 0:f7c60d3e7b8a 131 }
maclobdell 0:f7c60d3e7b8a 132
maclobdell 0:f7c60d3e7b8a 133 #if !defined(MBEDTLS_SHA256_PROCESS_ALT)
maclobdell 0:f7c60d3e7b8a 134 static const uint32_t K[] =
maclobdell 0:f7c60d3e7b8a 135 {
maclobdell 0:f7c60d3e7b8a 136 0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5,
maclobdell 0:f7c60d3e7b8a 137 0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5,
maclobdell 0:f7c60d3e7b8a 138 0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3,
maclobdell 0:f7c60d3e7b8a 139 0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174,
maclobdell 0:f7c60d3e7b8a 140 0xE49B69C1, 0xEFBE4786, 0x0FC19DC6, 0x240CA1CC,
maclobdell 0:f7c60d3e7b8a 141 0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA,
maclobdell 0:f7c60d3e7b8a 142 0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7,
maclobdell 0:f7c60d3e7b8a 143 0xC6E00BF3, 0xD5A79147, 0x06CA6351, 0x14292967,
maclobdell 0:f7c60d3e7b8a 144 0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13,
maclobdell 0:f7c60d3e7b8a 145 0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85,
maclobdell 0:f7c60d3e7b8a 146 0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3,
maclobdell 0:f7c60d3e7b8a 147 0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070,
maclobdell 0:f7c60d3e7b8a 148 0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5,
maclobdell 0:f7c60d3e7b8a 149 0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3,
maclobdell 0:f7c60d3e7b8a 150 0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208,
maclobdell 0:f7c60d3e7b8a 151 0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2,
maclobdell 0:f7c60d3e7b8a 152 };
maclobdell 0:f7c60d3e7b8a 153
maclobdell 0:f7c60d3e7b8a 154 #define SHR(x,n) ((x & 0xFFFFFFFF) >> n)
maclobdell 0:f7c60d3e7b8a 155 #define ROTR(x,n) (SHR(x,n) | (x << (32 - n)))
maclobdell 0:f7c60d3e7b8a 156
maclobdell 0:f7c60d3e7b8a 157 #define S0(x) (ROTR(x, 7) ^ ROTR(x,18) ^ SHR(x, 3))
maclobdell 0:f7c60d3e7b8a 158 #define S1(x) (ROTR(x,17) ^ ROTR(x,19) ^ SHR(x,10))
maclobdell 0:f7c60d3e7b8a 159
maclobdell 0:f7c60d3e7b8a 160 #define S2(x) (ROTR(x, 2) ^ ROTR(x,13) ^ ROTR(x,22))
maclobdell 0:f7c60d3e7b8a 161 #define S3(x) (ROTR(x, 6) ^ ROTR(x,11) ^ ROTR(x,25))
maclobdell 0:f7c60d3e7b8a 162
maclobdell 0:f7c60d3e7b8a 163 #define F0(x,y,z) ((x & y) | (z & (x | y)))
maclobdell 0:f7c60d3e7b8a 164 #define F1(x,y,z) (z ^ (x & (y ^ z)))
maclobdell 0:f7c60d3e7b8a 165
maclobdell 0:f7c60d3e7b8a 166 #define R(t) \
maclobdell 0:f7c60d3e7b8a 167 ( \
maclobdell 0:f7c60d3e7b8a 168 W[t] = S1(W[t - 2]) + W[t - 7] + \
maclobdell 0:f7c60d3e7b8a 169 S0(W[t - 15]) + W[t - 16] \
maclobdell 0:f7c60d3e7b8a 170 )
maclobdell 0:f7c60d3e7b8a 171
maclobdell 0:f7c60d3e7b8a 172 #define P(a,b,c,d,e,f,g,h,x,K) \
maclobdell 0:f7c60d3e7b8a 173 { \
maclobdell 0:f7c60d3e7b8a 174 temp1 = h + S3(e) + F1(e,f,g) + K + x; \
maclobdell 0:f7c60d3e7b8a 175 temp2 = S2(a) + F0(a,b,c); \
maclobdell 0:f7c60d3e7b8a 176 d += temp1; h = temp1 + temp2; \
maclobdell 0:f7c60d3e7b8a 177 }
maclobdell 0:f7c60d3e7b8a 178
maclobdell 0:f7c60d3e7b8a 179 void mbedtls_sha256_process( mbedtls_sha256_context *ctx, const unsigned char data[64] )
maclobdell 0:f7c60d3e7b8a 180 {
maclobdell 0:f7c60d3e7b8a 181 uint32_t temp1, temp2, W[64];
maclobdell 0:f7c60d3e7b8a 182 uint32_t A[8];
maclobdell 0:f7c60d3e7b8a 183 unsigned int i;
maclobdell 0:f7c60d3e7b8a 184
maclobdell 0:f7c60d3e7b8a 185 for( i = 0; i < 8; i++ )
maclobdell 0:f7c60d3e7b8a 186 A[i] = ctx->state[i];
maclobdell 0:f7c60d3e7b8a 187
maclobdell 0:f7c60d3e7b8a 188 #if defined(MBEDTLS_SHA256_SMALLER)
maclobdell 0:f7c60d3e7b8a 189 for( i = 0; i < 64; i++ )
maclobdell 0:f7c60d3e7b8a 190 {
maclobdell 0:f7c60d3e7b8a 191 if( i < 16 )
maclobdell 0:f7c60d3e7b8a 192 GET_UINT32_BE( W[i], data, 4 * i );
maclobdell 0:f7c60d3e7b8a 193 else
maclobdell 0:f7c60d3e7b8a 194 R( i );
maclobdell 0:f7c60d3e7b8a 195
maclobdell 0:f7c60d3e7b8a 196 P( A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], W[i], K[i] );
maclobdell 0:f7c60d3e7b8a 197
maclobdell 0:f7c60d3e7b8a 198 temp1 = A[7]; A[7] = A[6]; A[6] = A[5]; A[5] = A[4]; A[4] = A[3];
maclobdell 0:f7c60d3e7b8a 199 A[3] = A[2]; A[2] = A[1]; A[1] = A[0]; A[0] = temp1;
maclobdell 0:f7c60d3e7b8a 200 }
maclobdell 0:f7c60d3e7b8a 201 #else /* MBEDTLS_SHA256_SMALLER */
maclobdell 0:f7c60d3e7b8a 202 for( i = 0; i < 16; i++ )
maclobdell 0:f7c60d3e7b8a 203 GET_UINT32_BE( W[i], data, 4 * i );
maclobdell 0:f7c60d3e7b8a 204
maclobdell 0:f7c60d3e7b8a 205 for( i = 0; i < 16; i += 8 )
maclobdell 0:f7c60d3e7b8a 206 {
maclobdell 0:f7c60d3e7b8a 207 P( A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], W[i+0], K[i+0] );
maclobdell 0:f7c60d3e7b8a 208 P( A[7], A[0], A[1], A[2], A[3], A[4], A[5], A[6], W[i+1], K[i+1] );
maclobdell 0:f7c60d3e7b8a 209 P( A[6], A[7], A[0], A[1], A[2], A[3], A[4], A[5], W[i+2], K[i+2] );
maclobdell 0:f7c60d3e7b8a 210 P( A[5], A[6], A[7], A[0], A[1], A[2], A[3], A[4], W[i+3], K[i+3] );
maclobdell 0:f7c60d3e7b8a 211 P( A[4], A[5], A[6], A[7], A[0], A[1], A[2], A[3], W[i+4], K[i+4] );
maclobdell 0:f7c60d3e7b8a 212 P( A[3], A[4], A[5], A[6], A[7], A[0], A[1], A[2], W[i+5], K[i+5] );
maclobdell 0:f7c60d3e7b8a 213 P( A[2], A[3], A[4], A[5], A[6], A[7], A[0], A[1], W[i+6], K[i+6] );
maclobdell 0:f7c60d3e7b8a 214 P( A[1], A[2], A[3], A[4], A[5], A[6], A[7], A[0], W[i+7], K[i+7] );
maclobdell 0:f7c60d3e7b8a 215 }
maclobdell 0:f7c60d3e7b8a 216
maclobdell 0:f7c60d3e7b8a 217 for( i = 16; i < 64; i += 8 )
maclobdell 0:f7c60d3e7b8a 218 {
maclobdell 0:f7c60d3e7b8a 219 P( A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], R(i+0), K[i+0] );
maclobdell 0:f7c60d3e7b8a 220 P( A[7], A[0], A[1], A[2], A[3], A[4], A[5], A[6], R(i+1), K[i+1] );
maclobdell 0:f7c60d3e7b8a 221 P( A[6], A[7], A[0], A[1], A[2], A[3], A[4], A[5], R(i+2), K[i+2] );
maclobdell 0:f7c60d3e7b8a 222 P( A[5], A[6], A[7], A[0], A[1], A[2], A[3], A[4], R(i+3), K[i+3] );
maclobdell 0:f7c60d3e7b8a 223 P( A[4], A[5], A[6], A[7], A[0], A[1], A[2], A[3], R(i+4), K[i+4] );
maclobdell 0:f7c60d3e7b8a 224 P( A[3], A[4], A[5], A[6], A[7], A[0], A[1], A[2], R(i+5), K[i+5] );
maclobdell 0:f7c60d3e7b8a 225 P( A[2], A[3], A[4], A[5], A[6], A[7], A[0], A[1], R(i+6), K[i+6] );
maclobdell 0:f7c60d3e7b8a 226 P( A[1], A[2], A[3], A[4], A[5], A[6], A[7], A[0], R(i+7), K[i+7] );
maclobdell 0:f7c60d3e7b8a 227 }
maclobdell 0:f7c60d3e7b8a 228 #endif /* MBEDTLS_SHA256_SMALLER */
maclobdell 0:f7c60d3e7b8a 229
maclobdell 0:f7c60d3e7b8a 230 for( i = 0; i < 8; i++ )
maclobdell 0:f7c60d3e7b8a 231 ctx->state[i] += A[i];
maclobdell 0:f7c60d3e7b8a 232 }
maclobdell 0:f7c60d3e7b8a 233 #endif /* !MBEDTLS_SHA256_PROCESS_ALT */
maclobdell 0:f7c60d3e7b8a 234
maclobdell 0:f7c60d3e7b8a 235 /*
maclobdell 0:f7c60d3e7b8a 236 * SHA-256 process buffer
maclobdell 0:f7c60d3e7b8a 237 */
maclobdell 0:f7c60d3e7b8a 238 void mbedtls_sha256_update( mbedtls_sha256_context *ctx, const unsigned char *input,
maclobdell 0:f7c60d3e7b8a 239 size_t ilen )
maclobdell 0:f7c60d3e7b8a 240 {
maclobdell 0:f7c60d3e7b8a 241 size_t fill;
maclobdell 0:f7c60d3e7b8a 242 uint32_t left;
maclobdell 0:f7c60d3e7b8a 243
maclobdell 0:f7c60d3e7b8a 244 if( ilen == 0 )
maclobdell 0:f7c60d3e7b8a 245 return;
maclobdell 0:f7c60d3e7b8a 246
maclobdell 0:f7c60d3e7b8a 247 left = ctx->total[0] & 0x3F;
maclobdell 0:f7c60d3e7b8a 248 fill = 64 - left;
maclobdell 0:f7c60d3e7b8a 249
maclobdell 0:f7c60d3e7b8a 250 ctx->total[0] += (uint32_t) ilen;
maclobdell 0:f7c60d3e7b8a 251 ctx->total[0] &= 0xFFFFFFFF;
maclobdell 0:f7c60d3e7b8a 252
maclobdell 0:f7c60d3e7b8a 253 if( ctx->total[0] < (uint32_t) ilen )
maclobdell 0:f7c60d3e7b8a 254 ctx->total[1]++;
maclobdell 0:f7c60d3e7b8a 255
maclobdell 0:f7c60d3e7b8a 256 if( left && ilen >= fill )
maclobdell 0:f7c60d3e7b8a 257 {
maclobdell 0:f7c60d3e7b8a 258 memcpy( (void *) (ctx->buffer + left), input, fill );
maclobdell 0:f7c60d3e7b8a 259 mbedtls_sha256_process( ctx, ctx->buffer );
maclobdell 0:f7c60d3e7b8a 260 input += fill;
maclobdell 0:f7c60d3e7b8a 261 ilen -= fill;
maclobdell 0:f7c60d3e7b8a 262 left = 0;
maclobdell 0:f7c60d3e7b8a 263 }
maclobdell 0:f7c60d3e7b8a 264
maclobdell 0:f7c60d3e7b8a 265 while( ilen >= 64 )
maclobdell 0:f7c60d3e7b8a 266 {
maclobdell 0:f7c60d3e7b8a 267 mbedtls_sha256_process( ctx, input );
maclobdell 0:f7c60d3e7b8a 268 input += 64;
maclobdell 0:f7c60d3e7b8a 269 ilen -= 64;
maclobdell 0:f7c60d3e7b8a 270 }
maclobdell 0:f7c60d3e7b8a 271
maclobdell 0:f7c60d3e7b8a 272 if( ilen > 0 )
maclobdell 0:f7c60d3e7b8a 273 memcpy( (void *) (ctx->buffer + left), input, ilen );
maclobdell 0:f7c60d3e7b8a 274 }
maclobdell 0:f7c60d3e7b8a 275
maclobdell 0:f7c60d3e7b8a 276 static const unsigned char sha256_padding[64] =
maclobdell 0:f7c60d3e7b8a 277 {
maclobdell 0:f7c60d3e7b8a 278 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
maclobdell 0:f7c60d3e7b8a 279 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
maclobdell 0:f7c60d3e7b8a 280 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
maclobdell 0:f7c60d3e7b8a 281 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
maclobdell 0:f7c60d3e7b8a 282 };
maclobdell 0:f7c60d3e7b8a 283
maclobdell 0:f7c60d3e7b8a 284 /*
maclobdell 0:f7c60d3e7b8a 285 * SHA-256 final digest
maclobdell 0:f7c60d3e7b8a 286 */
maclobdell 0:f7c60d3e7b8a 287 void mbedtls_sha256_finish( mbedtls_sha256_context *ctx, unsigned char output[32] )
maclobdell 0:f7c60d3e7b8a 288 {
maclobdell 0:f7c60d3e7b8a 289 uint32_t last, padn;
maclobdell 0:f7c60d3e7b8a 290 uint32_t high, low;
maclobdell 0:f7c60d3e7b8a 291 unsigned char msglen[8];
maclobdell 0:f7c60d3e7b8a 292
maclobdell 0:f7c60d3e7b8a 293 high = ( ctx->total[0] >> 29 )
maclobdell 0:f7c60d3e7b8a 294 | ( ctx->total[1] << 3 );
maclobdell 0:f7c60d3e7b8a 295 low = ( ctx->total[0] << 3 );
maclobdell 0:f7c60d3e7b8a 296
maclobdell 0:f7c60d3e7b8a 297 PUT_UINT32_BE( high, msglen, 0 );
maclobdell 0:f7c60d3e7b8a 298 PUT_UINT32_BE( low, msglen, 4 );
maclobdell 0:f7c60d3e7b8a 299
maclobdell 0:f7c60d3e7b8a 300 last = ctx->total[0] & 0x3F;
maclobdell 0:f7c60d3e7b8a 301 padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );
maclobdell 0:f7c60d3e7b8a 302
maclobdell 0:f7c60d3e7b8a 303 mbedtls_sha256_update( ctx, sha256_padding, padn );
maclobdell 0:f7c60d3e7b8a 304 mbedtls_sha256_update( ctx, msglen, 8 );
maclobdell 0:f7c60d3e7b8a 305
maclobdell 0:f7c60d3e7b8a 306 PUT_UINT32_BE( ctx->state[0], output, 0 );
maclobdell 0:f7c60d3e7b8a 307 PUT_UINT32_BE( ctx->state[1], output, 4 );
maclobdell 0:f7c60d3e7b8a 308 PUT_UINT32_BE( ctx->state[2], output, 8 );
maclobdell 0:f7c60d3e7b8a 309 PUT_UINT32_BE( ctx->state[3], output, 12 );
maclobdell 0:f7c60d3e7b8a 310 PUT_UINT32_BE( ctx->state[4], output, 16 );
maclobdell 0:f7c60d3e7b8a 311 PUT_UINT32_BE( ctx->state[5], output, 20 );
maclobdell 0:f7c60d3e7b8a 312 PUT_UINT32_BE( ctx->state[6], output, 24 );
maclobdell 0:f7c60d3e7b8a 313
maclobdell 0:f7c60d3e7b8a 314 if( ctx->is224 == 0 )
maclobdell 0:f7c60d3e7b8a 315 PUT_UINT32_BE( ctx->state[7], output, 28 );
maclobdell 0:f7c60d3e7b8a 316 }
maclobdell 0:f7c60d3e7b8a 317
maclobdell 0:f7c60d3e7b8a 318 #endif /* !MBEDTLS_SHA256_ALT */
maclobdell 0:f7c60d3e7b8a 319
maclobdell 0:f7c60d3e7b8a 320 /*
maclobdell 0:f7c60d3e7b8a 321 * output = SHA-256( input buffer )
maclobdell 0:f7c60d3e7b8a 322 */
maclobdell 0:f7c60d3e7b8a 323 void mbedtls_sha256( const unsigned char *input, size_t ilen,
maclobdell 0:f7c60d3e7b8a 324 unsigned char output[32], int is224 )
maclobdell 0:f7c60d3e7b8a 325 {
maclobdell 0:f7c60d3e7b8a 326 mbedtls_sha256_context ctx;
maclobdell 0:f7c60d3e7b8a 327
maclobdell 0:f7c60d3e7b8a 328 mbedtls_sha256_init( &ctx );
maclobdell 0:f7c60d3e7b8a 329 mbedtls_sha256_starts( &ctx, is224 );
maclobdell 0:f7c60d3e7b8a 330 mbedtls_sha256_update( &ctx, input, ilen );
maclobdell 0:f7c60d3e7b8a 331 mbedtls_sha256_finish( &ctx, output );
maclobdell 0:f7c60d3e7b8a 332 mbedtls_sha256_free( &ctx );
maclobdell 0:f7c60d3e7b8a 333 }
maclobdell 0:f7c60d3e7b8a 334
maclobdell 0:f7c60d3e7b8a 335 #if defined(MBEDTLS_SELF_TEST)
maclobdell 0:f7c60d3e7b8a 336 /*
maclobdell 0:f7c60d3e7b8a 337 * FIPS-180-2 test vectors
maclobdell 0:f7c60d3e7b8a 338 */
maclobdell 0:f7c60d3e7b8a 339 static const unsigned char sha256_test_buf[3][57] =
maclobdell 0:f7c60d3e7b8a 340 {
maclobdell 0:f7c60d3e7b8a 341 { "abc" },
maclobdell 0:f7c60d3e7b8a 342 { "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" },
maclobdell 0:f7c60d3e7b8a 343 { "" }
maclobdell 0:f7c60d3e7b8a 344 };
maclobdell 0:f7c60d3e7b8a 345
maclobdell 0:f7c60d3e7b8a 346 static const int sha256_test_buflen[3] =
maclobdell 0:f7c60d3e7b8a 347 {
maclobdell 0:f7c60d3e7b8a 348 3, 56, 1000
maclobdell 0:f7c60d3e7b8a 349 };
maclobdell 0:f7c60d3e7b8a 350
maclobdell 0:f7c60d3e7b8a 351 static const unsigned char sha256_test_sum[6][32] =
maclobdell 0:f7c60d3e7b8a 352 {
maclobdell 0:f7c60d3e7b8a 353 /*
maclobdell 0:f7c60d3e7b8a 354 * SHA-224 test vectors
maclobdell 0:f7c60d3e7b8a 355 */
maclobdell 0:f7c60d3e7b8a 356 { 0x23, 0x09, 0x7D, 0x22, 0x34, 0x05, 0xD8, 0x22,
maclobdell 0:f7c60d3e7b8a 357 0x86, 0x42, 0xA4, 0x77, 0xBD, 0xA2, 0x55, 0xB3,
maclobdell 0:f7c60d3e7b8a 358 0x2A, 0xAD, 0xBC, 0xE4, 0xBD, 0xA0, 0xB3, 0xF7,
maclobdell 0:f7c60d3e7b8a 359 0xE3, 0x6C, 0x9D, 0xA7 },
maclobdell 0:f7c60d3e7b8a 360 { 0x75, 0x38, 0x8B, 0x16, 0x51, 0x27, 0x76, 0xCC,
maclobdell 0:f7c60d3e7b8a 361 0x5D, 0xBA, 0x5D, 0xA1, 0xFD, 0x89, 0x01, 0x50,
maclobdell 0:f7c60d3e7b8a 362 0xB0, 0xC6, 0x45, 0x5C, 0xB4, 0xF5, 0x8B, 0x19,
maclobdell 0:f7c60d3e7b8a 363 0x52, 0x52, 0x25, 0x25 },
maclobdell 0:f7c60d3e7b8a 364 { 0x20, 0x79, 0x46, 0x55, 0x98, 0x0C, 0x91, 0xD8,
maclobdell 0:f7c60d3e7b8a 365 0xBB, 0xB4, 0xC1, 0xEA, 0x97, 0x61, 0x8A, 0x4B,
maclobdell 0:f7c60d3e7b8a 366 0xF0, 0x3F, 0x42, 0x58, 0x19, 0x48, 0xB2, 0xEE,
maclobdell 0:f7c60d3e7b8a 367 0x4E, 0xE7, 0xAD, 0x67 },
maclobdell 0:f7c60d3e7b8a 368
maclobdell 0:f7c60d3e7b8a 369 /*
maclobdell 0:f7c60d3e7b8a 370 * SHA-256 test vectors
maclobdell 0:f7c60d3e7b8a 371 */
maclobdell 0:f7c60d3e7b8a 372 { 0xBA, 0x78, 0x16, 0xBF, 0x8F, 0x01, 0xCF, 0xEA,
maclobdell 0:f7c60d3e7b8a 373 0x41, 0x41, 0x40, 0xDE, 0x5D, 0xAE, 0x22, 0x23,
maclobdell 0:f7c60d3e7b8a 374 0xB0, 0x03, 0x61, 0xA3, 0x96, 0x17, 0x7A, 0x9C,
maclobdell 0:f7c60d3e7b8a 375 0xB4, 0x10, 0xFF, 0x61, 0xF2, 0x00, 0x15, 0xAD },
maclobdell 0:f7c60d3e7b8a 376 { 0x24, 0x8D, 0x6A, 0x61, 0xD2, 0x06, 0x38, 0xB8,
maclobdell 0:f7c60d3e7b8a 377 0xE5, 0xC0, 0x26, 0x93, 0x0C, 0x3E, 0x60, 0x39,
maclobdell 0:f7c60d3e7b8a 378 0xA3, 0x3C, 0xE4, 0x59, 0x64, 0xFF, 0x21, 0x67,
maclobdell 0:f7c60d3e7b8a 379 0xF6, 0xEC, 0xED, 0xD4, 0x19, 0xDB, 0x06, 0xC1 },
maclobdell 0:f7c60d3e7b8a 380 { 0xCD, 0xC7, 0x6E, 0x5C, 0x99, 0x14, 0xFB, 0x92,
maclobdell 0:f7c60d3e7b8a 381 0x81, 0xA1, 0xC7, 0xE2, 0x84, 0xD7, 0x3E, 0x67,
maclobdell 0:f7c60d3e7b8a 382 0xF1, 0x80, 0x9A, 0x48, 0xA4, 0x97, 0x20, 0x0E,
maclobdell 0:f7c60d3e7b8a 383 0x04, 0x6D, 0x39, 0xCC, 0xC7, 0x11, 0x2C, 0xD0 }
maclobdell 0:f7c60d3e7b8a 384 };
maclobdell 0:f7c60d3e7b8a 385
maclobdell 0:f7c60d3e7b8a 386 /*
maclobdell 0:f7c60d3e7b8a 387 * Checkup routine
maclobdell 0:f7c60d3e7b8a 388 */
maclobdell 0:f7c60d3e7b8a 389 int mbedtls_sha256_self_test( int verbose )
maclobdell 0:f7c60d3e7b8a 390 {
maclobdell 0:f7c60d3e7b8a 391 int i, j, k, buflen, ret = 0;
maclobdell 0:f7c60d3e7b8a 392 unsigned char buf[1024];
maclobdell 0:f7c60d3e7b8a 393 unsigned char sha256sum[32];
maclobdell 0:f7c60d3e7b8a 394 mbedtls_sha256_context ctx;
maclobdell 0:f7c60d3e7b8a 395
maclobdell 0:f7c60d3e7b8a 396 mbedtls_sha256_init( &ctx );
maclobdell 0:f7c60d3e7b8a 397
maclobdell 0:f7c60d3e7b8a 398 for( i = 0; i < 6; i++ )
maclobdell 0:f7c60d3e7b8a 399 {
maclobdell 0:f7c60d3e7b8a 400 j = i % 3;
maclobdell 0:f7c60d3e7b8a 401 k = i < 3;
maclobdell 0:f7c60d3e7b8a 402
maclobdell 0:f7c60d3e7b8a 403 if( verbose != 0 )
maclobdell 0:f7c60d3e7b8a 404 mbedtls_printf( " SHA-%d test #%d: ", 256 - k * 32, j + 1 );
maclobdell 0:f7c60d3e7b8a 405
maclobdell 0:f7c60d3e7b8a 406 mbedtls_sha256_starts( &ctx, k );
maclobdell 0:f7c60d3e7b8a 407
maclobdell 0:f7c60d3e7b8a 408 if( j == 2 )
maclobdell 0:f7c60d3e7b8a 409 {
maclobdell 0:f7c60d3e7b8a 410 memset( buf, 'a', buflen = 1000 );
maclobdell 0:f7c60d3e7b8a 411
maclobdell 0:f7c60d3e7b8a 412 for( j = 0; j < 1000; j++ )
maclobdell 0:f7c60d3e7b8a 413 mbedtls_sha256_update( &ctx, buf, buflen );
maclobdell 0:f7c60d3e7b8a 414 }
maclobdell 0:f7c60d3e7b8a 415 else
maclobdell 0:f7c60d3e7b8a 416 mbedtls_sha256_update( &ctx, sha256_test_buf[j],
maclobdell 0:f7c60d3e7b8a 417 sha256_test_buflen[j] );
maclobdell 0:f7c60d3e7b8a 418
maclobdell 0:f7c60d3e7b8a 419 mbedtls_sha256_finish( &ctx, sha256sum );
maclobdell 0:f7c60d3e7b8a 420
maclobdell 0:f7c60d3e7b8a 421 if( memcmp( sha256sum, sha256_test_sum[i], 32 - k * 4 ) != 0 )
maclobdell 0:f7c60d3e7b8a 422 {
maclobdell 0:f7c60d3e7b8a 423 if( verbose != 0 )
maclobdell 0:f7c60d3e7b8a 424 mbedtls_printf( "failed\n" );
maclobdell 0:f7c60d3e7b8a 425
maclobdell 0:f7c60d3e7b8a 426 ret = 1;
maclobdell 0:f7c60d3e7b8a 427 goto exit;
maclobdell 0:f7c60d3e7b8a 428 }
maclobdell 0:f7c60d3e7b8a 429
maclobdell 0:f7c60d3e7b8a 430 if( verbose != 0 )
maclobdell 0:f7c60d3e7b8a 431 mbedtls_printf( "passed\n" );
maclobdell 0:f7c60d3e7b8a 432 }
maclobdell 0:f7c60d3e7b8a 433
maclobdell 0:f7c60d3e7b8a 434 if( verbose != 0 )
maclobdell 0:f7c60d3e7b8a 435 mbedtls_printf( "\n" );
maclobdell 0:f7c60d3e7b8a 436
maclobdell 0:f7c60d3e7b8a 437 exit:
maclobdell 0:f7c60d3e7b8a 438 mbedtls_sha256_free( &ctx );
maclobdell 0:f7c60d3e7b8a 439
maclobdell 0:f7c60d3e7b8a 440 return( ret );
maclobdell 0:f7c60d3e7b8a 441 }
maclobdell 0:f7c60d3e7b8a 442
maclobdell 0:f7c60d3e7b8a 443 #endif /* MBEDTLS_SELF_TEST */
maclobdell 0:f7c60d3e7b8a 444
maclobdell 0:f7c60d3e7b8a 445 #endif /* MBEDTLS_SHA256_C */