erkin yucel / mbed-os

mbed os with nrf51 internal bandgap enabled to read battery level

Dependents:   BLE_file_test BLE_Blink ExternalEncoder

features/mbedtls/src/sha256.c@0:f269e3021894, 2016-10-23 (annotated)

Committer:
elessair
Date:
Sun Oct 23 15:10:02 2016 +0000
Revision:
0:f269e3021894
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
elessair 0:f269e3021894 1 /*
elessair 0:f269e3021894 2 * FIPS-180-2 compliant SHA-256 implementation
elessair 0:f269e3021894 3 *
elessair 0:f269e3021894 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
elessair 0:f269e3021894 5 * SPDX-License-Identifier: Apache-2.0
elessair 0:f269e3021894 6 *
elessair 0:f269e3021894 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
elessair 0:f269e3021894 8 * not use this file except in compliance with the License.
elessair 0:f269e3021894 9 * You may obtain a copy of the License at
elessair 0:f269e3021894 10 *
elessair 0:f269e3021894 11 * http://www.apache.org/licenses/LICENSE-2.0
elessair 0:f269e3021894 12 *
elessair 0:f269e3021894 13 * Unless required by applicable law or agreed to in writing, software
elessair 0:f269e3021894 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
elessair 0:f269e3021894 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
elessair 0:f269e3021894 16 * See the License for the specific language governing permissions and
elessair 0:f269e3021894 17 * limitations under the License.
elessair 0:f269e3021894 18 *
elessair 0:f269e3021894 19 * This file is part of mbed TLS (https://tls.mbed.org)
elessair 0:f269e3021894 20 */
elessair 0:f269e3021894 21 /*
elessair 0:f269e3021894 22 * The SHA-256 Secure Hash Standard was published by NIST in 2002.
elessair 0:f269e3021894 23 *
elessair 0:f269e3021894 24 * http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
elessair 0:f269e3021894 25 */
elessair 0:f269e3021894 26
elessair 0:f269e3021894 27 #if !defined(MBEDTLS_CONFIG_FILE)
elessair 0:f269e3021894 28 #include "mbedtls/config.h"
elessair 0:f269e3021894 29 #else
elessair 0:f269e3021894 30 #include MBEDTLS_CONFIG_FILE
elessair 0:f269e3021894 31 #endif
elessair 0:f269e3021894 32
elessair 0:f269e3021894 33 #if defined(MBEDTLS_SHA256_C)
elessair 0:f269e3021894 34
elessair 0:f269e3021894 35 #include "mbedtls/sha256.h"
elessair 0:f269e3021894 36
elessair 0:f269e3021894 37 #include <string.h>
elessair 0:f269e3021894 38
elessair 0:f269e3021894 39 #if defined(MBEDTLS_SELF_TEST)
elessair 0:f269e3021894 40 #if defined(MBEDTLS_PLATFORM_C)
elessair 0:f269e3021894 41 #include "mbedtls/platform.h"
elessair 0:f269e3021894 42 #else
elessair 0:f269e3021894 43 #include <stdio.h>
elessair 0:f269e3021894 44 #include <stdlib.h>
elessair 0:f269e3021894 45 #define mbedtls_printf printf
elessair 0:f269e3021894 46 #define mbedtls_calloc calloc
elessair 0:f269e3021894 47 #define mbedtls_free free
elessair 0:f269e3021894 48 #endif /* MBEDTLS_PLATFORM_C */
elessair 0:f269e3021894 49 #endif /* MBEDTLS_SELF_TEST */
elessair 0:f269e3021894 50
elessair 0:f269e3021894 51 #if !defined(MBEDTLS_SHA256_ALT)
elessair 0:f269e3021894 52
elessair 0:f269e3021894 53 /* Implementation that should never be optimized out by the compiler */
elessair 0:f269e3021894 54 static void mbedtls_zeroize( void *v, size_t n ) {
elessair 0:f269e3021894 55 volatile unsigned char *p = v; while( n-- ) *p++ = 0;
elessair 0:f269e3021894 56 }
elessair 0:f269e3021894 57
elessair 0:f269e3021894 58 /*
elessair 0:f269e3021894 59 * 32-bit integer manipulation macros (big endian)
elessair 0:f269e3021894 60 */
elessair 0:f269e3021894 61 #ifndef GET_UINT32_BE
elessair 0:f269e3021894 62 #define GET_UINT32_BE(n,b,i) \
elessair 0:f269e3021894 63 do { \
elessair 0:f269e3021894 64 (n) = ( (uint32_t) (b)[(i) ] << 24 ) \
elessair 0:f269e3021894 65 | ( (uint32_t) (b)[(i) + 1] << 16 ) \
elessair 0:f269e3021894 66 | ( (uint32_t) (b)[(i) + 2] << 8 ) \
elessair 0:f269e3021894 67 | ( (uint32_t) (b)[(i) + 3] ); \
elessair 0:f269e3021894 68 } while( 0 )
elessair 0:f269e3021894 69 #endif
elessair 0:f269e3021894 70
elessair 0:f269e3021894 71 #ifndef PUT_UINT32_BE
elessair 0:f269e3021894 72 #define PUT_UINT32_BE(n,b,i) \
elessair 0:f269e3021894 73 do { \
elessair 0:f269e3021894 74 (b)[(i) ] = (unsigned char) ( (n) >> 24 ); \
elessair 0:f269e3021894 75 (b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \
elessair 0:f269e3021894 76 (b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \
elessair 0:f269e3021894 77 (b)[(i) + 3] = (unsigned char) ( (n) ); \
elessair 0:f269e3021894 78 } while( 0 )
elessair 0:f269e3021894 79 #endif
elessair 0:f269e3021894 80
elessair 0:f269e3021894 81 void mbedtls_sha256_init( mbedtls_sha256_context *ctx )
elessair 0:f269e3021894 82 {
elessair 0:f269e3021894 83 memset( ctx, 0, sizeof( mbedtls_sha256_context ) );
elessair 0:f269e3021894 84 }
elessair 0:f269e3021894 85
elessair 0:f269e3021894 86 void mbedtls_sha256_free( mbedtls_sha256_context *ctx )
elessair 0:f269e3021894 87 {
elessair 0:f269e3021894 88 if( ctx == NULL )
elessair 0:f269e3021894 89 return;
elessair 0:f269e3021894 90
elessair 0:f269e3021894 91 mbedtls_zeroize( ctx, sizeof( mbedtls_sha256_context ) );
elessair 0:f269e3021894 92 }
elessair 0:f269e3021894 93
elessair 0:f269e3021894 94 void mbedtls_sha256_clone( mbedtls_sha256_context *dst,
elessair 0:f269e3021894 95 const mbedtls_sha256_context *src )
elessair 0:f269e3021894 96 {
elessair 0:f269e3021894 97 *dst = *src;
elessair 0:f269e3021894 98 }
elessair 0:f269e3021894 99
elessair 0:f269e3021894 100 /*
elessair 0:f269e3021894 101 * SHA-256 context setup
elessair 0:f269e3021894 102 */
elessair 0:f269e3021894 103 void mbedtls_sha256_starts( mbedtls_sha256_context *ctx, int is224 )
elessair 0:f269e3021894 104 {
elessair 0:f269e3021894 105 ctx->total[0] = 0;
elessair 0:f269e3021894 106 ctx->total[1] = 0;
elessair 0:f269e3021894 107
elessair 0:f269e3021894 108 if( is224 == 0 )
elessair 0:f269e3021894 109 {
elessair 0:f269e3021894 110 /* SHA-256 */
elessair 0:f269e3021894 111 ctx->state[0] = 0x6A09E667;
elessair 0:f269e3021894 112 ctx->state[1] = 0xBB67AE85;
elessair 0:f269e3021894 113 ctx->state[2] = 0x3C6EF372;
elessair 0:f269e3021894 114 ctx->state[3] = 0xA54FF53A;
elessair 0:f269e3021894 115 ctx->state[4] = 0x510E527F;
elessair 0:f269e3021894 116 ctx->state[5] = 0x9B05688C;
elessair 0:f269e3021894 117 ctx->state[6] = 0x1F83D9AB;
elessair 0:f269e3021894 118 ctx->state[7] = 0x5BE0CD19;
elessair 0:f269e3021894 119 }
elessair 0:f269e3021894 120 else
elessair 0:f269e3021894 121 {
elessair 0:f269e3021894 122 /* SHA-224 */
elessair 0:f269e3021894 123 ctx->state[0] = 0xC1059ED8;
elessair 0:f269e3021894 124 ctx->state[1] = 0x367CD507;
elessair 0:f269e3021894 125 ctx->state[2] = 0x3070DD17;
elessair 0:f269e3021894 126 ctx->state[3] = 0xF70E5939;
elessair 0:f269e3021894 127 ctx->state[4] = 0xFFC00B31;
elessair 0:f269e3021894 128 ctx->state[5] = 0x68581511;
elessair 0:f269e3021894 129 ctx->state[6] = 0x64F98FA7;
elessair 0:f269e3021894 130 ctx->state[7] = 0xBEFA4FA4;
elessair 0:f269e3021894 131 }
elessair 0:f269e3021894 132
elessair 0:f269e3021894 133 ctx->is224 = is224;
elessair 0:f269e3021894 134 }
elessair 0:f269e3021894 135
elessair 0:f269e3021894 136 #if !defined(MBEDTLS_SHA256_PROCESS_ALT)
elessair 0:f269e3021894 137 static const uint32_t K[] =
elessair 0:f269e3021894 138 {
elessair 0:f269e3021894 139 0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5,
elessair 0:f269e3021894 140 0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5,
elessair 0:f269e3021894 141 0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3,
elessair 0:f269e3021894 142 0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174,
elessair 0:f269e3021894 143 0xE49B69C1, 0xEFBE4786, 0x0FC19DC6, 0x240CA1CC,
elessair 0:f269e3021894 144 0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA,
elessair 0:f269e3021894 145 0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7,
elessair 0:f269e3021894 146 0xC6E00BF3, 0xD5A79147, 0x06CA6351, 0x14292967,
elessair 0:f269e3021894 147 0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13,
elessair 0:f269e3021894 148 0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85,
elessair 0:f269e3021894 149 0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3,
elessair 0:f269e3021894 150 0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070,
elessair 0:f269e3021894 151 0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5,
elessair 0:f269e3021894 152 0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3,
elessair 0:f269e3021894 153 0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208,
elessair 0:f269e3021894 154 0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2,
elessair 0:f269e3021894 155 };
elessair 0:f269e3021894 156
elessair 0:f269e3021894 157 #define SHR(x,n) ((x & 0xFFFFFFFF) >> n)
elessair 0:f269e3021894 158 #define ROTR(x,n) (SHR(x,n) | (x << (32 - n)))
elessair 0:f269e3021894 159
elessair 0:f269e3021894 160 #define S0(x) (ROTR(x, 7) ^ ROTR(x,18) ^ SHR(x, 3))
elessair 0:f269e3021894 161 #define S1(x) (ROTR(x,17) ^ ROTR(x,19) ^ SHR(x,10))
elessair 0:f269e3021894 162
elessair 0:f269e3021894 163 #define S2(x) (ROTR(x, 2) ^ ROTR(x,13) ^ ROTR(x,22))
elessair 0:f269e3021894 164 #define S3(x) (ROTR(x, 6) ^ ROTR(x,11) ^ ROTR(x,25))
elessair 0:f269e3021894 165
elessair 0:f269e3021894 166 #define F0(x,y,z) ((x & y) | (z & (x | y)))
elessair 0:f269e3021894 167 #define F1(x,y,z) (z ^ (x & (y ^ z)))
elessair 0:f269e3021894 168
elessair 0:f269e3021894 169 #define R(t) \
elessair 0:f269e3021894 170 ( \
elessair 0:f269e3021894 171 W[t] = S1(W[t - 2]) + W[t - 7] + \
elessair 0:f269e3021894 172 S0(W[t - 15]) + W[t - 16] \
elessair 0:f269e3021894 173 )
elessair 0:f269e3021894 174
elessair 0:f269e3021894 175 #define P(a,b,c,d,e,f,g,h,x,K) \
elessair 0:f269e3021894 176 { \
elessair 0:f269e3021894 177 temp1 = h + S3(e) + F1(e,f,g) + K + x; \
elessair 0:f269e3021894 178 temp2 = S2(a) + F0(a,b,c); \
elessair 0:f269e3021894 179 d += temp1; h = temp1 + temp2; \
elessair 0:f269e3021894 180 }
elessair 0:f269e3021894 181
elessair 0:f269e3021894 182 void mbedtls_sha256_process( mbedtls_sha256_context *ctx, const unsigned char data[64] )
elessair 0:f269e3021894 183 {
elessair 0:f269e3021894 184 uint32_t temp1, temp2, W[64];
elessair 0:f269e3021894 185 uint32_t A[8];
elessair 0:f269e3021894 186 unsigned int i;
elessair 0:f269e3021894 187
elessair 0:f269e3021894 188 for( i = 0; i < 8; i++ )
elessair 0:f269e3021894 189 A[i] = ctx->state[i];
elessair 0:f269e3021894 190
elessair 0:f269e3021894 191 #if defined(MBEDTLS_SHA256_SMALLER)
elessair 0:f269e3021894 192 for( i = 0; i < 64; i++ )
elessair 0:f269e3021894 193 {
elessair 0:f269e3021894 194 if( i < 16 )
elessair 0:f269e3021894 195 GET_UINT32_BE( W[i], data, 4 * i );
elessair 0:f269e3021894 196 else
elessair 0:f269e3021894 197 R( i );
elessair 0:f269e3021894 198
elessair 0:f269e3021894 199 P( A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], W[i], K[i] );
elessair 0:f269e3021894 200
elessair 0:f269e3021894 201 temp1 = A[7]; A[7] = A[6]; A[6] = A[5]; A[5] = A[4]; A[4] = A[3];
elessair 0:f269e3021894 202 A[3] = A[2]; A[2] = A[1]; A[1] = A[0]; A[0] = temp1;
elessair 0:f269e3021894 203 }
elessair 0:f269e3021894 204 #else /* MBEDTLS_SHA256_SMALLER */
elessair 0:f269e3021894 205 for( i = 0; i < 16; i++ )
elessair 0:f269e3021894 206 GET_UINT32_BE( W[i], data, 4 * i );
elessair 0:f269e3021894 207
elessair 0:f269e3021894 208 for( i = 0; i < 16; i += 8 )
elessair 0:f269e3021894 209 {
elessair 0:f269e3021894 210 P( A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], W[i+0], K[i+0] );
elessair 0:f269e3021894 211 P( A[7], A[0], A[1], A[2], A[3], A[4], A[5], A[6], W[i+1], K[i+1] );
elessair 0:f269e3021894 212 P( A[6], A[7], A[0], A[1], A[2], A[3], A[4], A[5], W[i+2], K[i+2] );
elessair 0:f269e3021894 213 P( A[5], A[6], A[7], A[0], A[1], A[2], A[3], A[4], W[i+3], K[i+3] );
elessair 0:f269e3021894 214 P( A[4], A[5], A[6], A[7], A[0], A[1], A[2], A[3], W[i+4], K[i+4] );
elessair 0:f269e3021894 215 P( A[3], A[4], A[5], A[6], A[7], A[0], A[1], A[2], W[i+5], K[i+5] );
elessair 0:f269e3021894 216 P( A[2], A[3], A[4], A[5], A[6], A[7], A[0], A[1], W[i+6], K[i+6] );
elessair 0:f269e3021894 217 P( A[1], A[2], A[3], A[4], A[5], A[6], A[7], A[0], W[i+7], K[i+7] );
elessair 0:f269e3021894 218 }
elessair 0:f269e3021894 219
elessair 0:f269e3021894 220 for( i = 16; i < 64; i += 8 )
elessair 0:f269e3021894 221 {
elessair 0:f269e3021894 222 P( A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], R(i+0), K[i+0] );
elessair 0:f269e3021894 223 P( A[7], A[0], A[1], A[2], A[3], A[4], A[5], A[6], R(i+1), K[i+1] );
elessair 0:f269e3021894 224 P( A[6], A[7], A[0], A[1], A[2], A[3], A[4], A[5], R(i+2), K[i+2] );
elessair 0:f269e3021894 225 P( A[5], A[6], A[7], A[0], A[1], A[2], A[3], A[4], R(i+3), K[i+3] );
elessair 0:f269e3021894 226 P( A[4], A[5], A[6], A[7], A[0], A[1], A[2], A[3], R(i+4), K[i+4] );
elessair 0:f269e3021894 227 P( A[3], A[4], A[5], A[6], A[7], A[0], A[1], A[2], R(i+5), K[i+5] );
elessair 0:f269e3021894 228 P( A[2], A[3], A[4], A[5], A[6], A[7], A[0], A[1], R(i+6), K[i+6] );
elessair 0:f269e3021894 229 P( A[1], A[2], A[3], A[4], A[5], A[6], A[7], A[0], R(i+7), K[i+7] );
elessair 0:f269e3021894 230 }
elessair 0:f269e3021894 231 #endif /* MBEDTLS_SHA256_SMALLER */
elessair 0:f269e3021894 232
elessair 0:f269e3021894 233 for( i = 0; i < 8; i++ )
elessair 0:f269e3021894 234 ctx->state[i] += A[i];
elessair 0:f269e3021894 235 }
elessair 0:f269e3021894 236 #endif /* !MBEDTLS_SHA256_PROCESS_ALT */
elessair 0:f269e3021894 237
elessair 0:f269e3021894 238 /*
elessair 0:f269e3021894 239 * SHA-256 process buffer
elessair 0:f269e3021894 240 */
elessair 0:f269e3021894 241 void mbedtls_sha256_update( mbedtls_sha256_context *ctx, const unsigned char *input,
elessair 0:f269e3021894 242 size_t ilen )
elessair 0:f269e3021894 243 {
elessair 0:f269e3021894 244 size_t fill;
elessair 0:f269e3021894 245 uint32_t left;
elessair 0:f269e3021894 246
elessair 0:f269e3021894 247 if( ilen == 0 )
elessair 0:f269e3021894 248 return;
elessair 0:f269e3021894 249
elessair 0:f269e3021894 250 left = ctx->total[0] & 0x3F;
elessair 0:f269e3021894 251 fill = 64 - left;
elessair 0:f269e3021894 252
elessair 0:f269e3021894 253 ctx->total[0] += (uint32_t) ilen;
elessair 0:f269e3021894 254 ctx->total[0] &= 0xFFFFFFFF;
elessair 0:f269e3021894 255
elessair 0:f269e3021894 256 if( ctx->total[0] < (uint32_t) ilen )
elessair 0:f269e3021894 257 ctx->total[1]++;
elessair 0:f269e3021894 258
elessair 0:f269e3021894 259 if( left && ilen >= fill )
elessair 0:f269e3021894 260 {
elessair 0:f269e3021894 261 memcpy( (void *) (ctx->buffer + left), input, fill );
elessair 0:f269e3021894 262 mbedtls_sha256_process( ctx, ctx->buffer );
elessair 0:f269e3021894 263 input += fill;
elessair 0:f269e3021894 264 ilen -= fill;
elessair 0:f269e3021894 265 left = 0;
elessair 0:f269e3021894 266 }
elessair 0:f269e3021894 267
elessair 0:f269e3021894 268 while( ilen >= 64 )
elessair 0:f269e3021894 269 {
elessair 0:f269e3021894 270 mbedtls_sha256_process( ctx, input );
elessair 0:f269e3021894 271 input += 64;
elessair 0:f269e3021894 272 ilen -= 64;
elessair 0:f269e3021894 273 }
elessair 0:f269e3021894 274
elessair 0:f269e3021894 275 if( ilen > 0 )
elessair 0:f269e3021894 276 memcpy( (void *) (ctx->buffer + left), input, ilen );
elessair 0:f269e3021894 277 }
elessair 0:f269e3021894 278
elessair 0:f269e3021894 279 static const unsigned char sha256_padding[64] =
elessair 0:f269e3021894 280 {
elessair 0:f269e3021894 281 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
elessair 0:f269e3021894 282 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
elessair 0:f269e3021894 283 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
elessair 0:f269e3021894 284 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
elessair 0:f269e3021894 285 };
elessair 0:f269e3021894 286
elessair 0:f269e3021894 287 /*
elessair 0:f269e3021894 288 * SHA-256 final digest
elessair 0:f269e3021894 289 */
elessair 0:f269e3021894 290 void mbedtls_sha256_finish( mbedtls_sha256_context *ctx, unsigned char output[32] )
elessair 0:f269e3021894 291 {
elessair 0:f269e3021894 292 uint32_t last, padn;
elessair 0:f269e3021894 293 uint32_t high, low;
elessair 0:f269e3021894 294 unsigned char msglen[8];
elessair 0:f269e3021894 295
elessair 0:f269e3021894 296 high = ( ctx->total[0] >> 29 )
elessair 0:f269e3021894 297 | ( ctx->total[1] << 3 );
elessair 0:f269e3021894 298 low = ( ctx->total[0] << 3 );
elessair 0:f269e3021894 299
elessair 0:f269e3021894 300 PUT_UINT32_BE( high, msglen, 0 );
elessair 0:f269e3021894 301 PUT_UINT32_BE( low, msglen, 4 );
elessair 0:f269e3021894 302
elessair 0:f269e3021894 303 last = ctx->total[0] & 0x3F;
elessair 0:f269e3021894 304 padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );
elessair 0:f269e3021894 305
elessair 0:f269e3021894 306 mbedtls_sha256_update( ctx, sha256_padding, padn );
elessair 0:f269e3021894 307 mbedtls_sha256_update( ctx, msglen, 8 );
elessair 0:f269e3021894 308
elessair 0:f269e3021894 309 PUT_UINT32_BE( ctx->state[0], output, 0 );
elessair 0:f269e3021894 310 PUT_UINT32_BE( ctx->state[1], output, 4 );
elessair 0:f269e3021894 311 PUT_UINT32_BE( ctx->state[2], output, 8 );
elessair 0:f269e3021894 312 PUT_UINT32_BE( ctx->state[3], output, 12 );
elessair 0:f269e3021894 313 PUT_UINT32_BE( ctx->state[4], output, 16 );
elessair 0:f269e3021894 314 PUT_UINT32_BE( ctx->state[5], output, 20 );
elessair 0:f269e3021894 315 PUT_UINT32_BE( ctx->state[6], output, 24 );
elessair 0:f269e3021894 316
elessair 0:f269e3021894 317 if( ctx->is224 == 0 )
elessair 0:f269e3021894 318 PUT_UINT32_BE( ctx->state[7], output, 28 );
elessair 0:f269e3021894 319 }
elessair 0:f269e3021894 320
elessair 0:f269e3021894 321 #endif /* !MBEDTLS_SHA256_ALT */
elessair 0:f269e3021894 322
elessair 0:f269e3021894 323 /*
elessair 0:f269e3021894 324 * output = SHA-256( input buffer )
elessair 0:f269e3021894 325 */
elessair 0:f269e3021894 326 void mbedtls_sha256( const unsigned char *input, size_t ilen,
elessair 0:f269e3021894 327 unsigned char output[32], int is224 )
elessair 0:f269e3021894 328 {
elessair 0:f269e3021894 329 mbedtls_sha256_context ctx;
elessair 0:f269e3021894 330
elessair 0:f269e3021894 331 mbedtls_sha256_init( &ctx );
elessair 0:f269e3021894 332 mbedtls_sha256_starts( &ctx, is224 );
elessair 0:f269e3021894 333 mbedtls_sha256_update( &ctx, input, ilen );
elessair 0:f269e3021894 334 mbedtls_sha256_finish( &ctx, output );
elessair 0:f269e3021894 335 mbedtls_sha256_free( &ctx );
elessair 0:f269e3021894 336 }
elessair 0:f269e3021894 337
elessair 0:f269e3021894 338 #if defined(MBEDTLS_SELF_TEST)
elessair 0:f269e3021894 339 /*
elessair 0:f269e3021894 340 * FIPS-180-2 test vectors
elessair 0:f269e3021894 341 */
elessair 0:f269e3021894 342 static const unsigned char sha256_test_buf[3][57] =
elessair 0:f269e3021894 343 {
elessair 0:f269e3021894 344 { "abc" },
elessair 0:f269e3021894 345 { "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" },
elessair 0:f269e3021894 346 { "" }
elessair 0:f269e3021894 347 };
elessair 0:f269e3021894 348
elessair 0:f269e3021894 349 static const int sha256_test_buflen[3] =
elessair 0:f269e3021894 350 {
elessair 0:f269e3021894 351 3, 56, 1000
elessair 0:f269e3021894 352 };
elessair 0:f269e3021894 353
elessair 0:f269e3021894 354 static const unsigned char sha256_test_sum[6][32] =
elessair 0:f269e3021894 355 {
elessair 0:f269e3021894 356 /*
elessair 0:f269e3021894 357 * SHA-224 test vectors
elessair 0:f269e3021894 358 */
elessair 0:f269e3021894 359 { 0x23, 0x09, 0x7D, 0x22, 0x34, 0x05, 0xD8, 0x22,
elessair 0:f269e3021894 360 0x86, 0x42, 0xA4, 0x77, 0xBD, 0xA2, 0x55, 0xB3,
elessair 0:f269e3021894 361 0x2A, 0xAD, 0xBC, 0xE4, 0xBD, 0xA0, 0xB3, 0xF7,
elessair 0:f269e3021894 362 0xE3, 0x6C, 0x9D, 0xA7 },
elessair 0:f269e3021894 363 { 0x75, 0x38, 0x8B, 0x16, 0x51, 0x27, 0x76, 0xCC,
elessair 0:f269e3021894 364 0x5D, 0xBA, 0x5D, 0xA1, 0xFD, 0x89, 0x01, 0x50,
elessair 0:f269e3021894 365 0xB0, 0xC6, 0x45, 0x5C, 0xB4, 0xF5, 0x8B, 0x19,
elessair 0:f269e3021894 366 0x52, 0x52, 0x25, 0x25 },
elessair 0:f269e3021894 367 { 0x20, 0x79, 0x46, 0x55, 0x98, 0x0C, 0x91, 0xD8,
elessair 0:f269e3021894 368 0xBB, 0xB4, 0xC1, 0xEA, 0x97, 0x61, 0x8A, 0x4B,
elessair 0:f269e3021894 369 0xF0, 0x3F, 0x42, 0x58, 0x19, 0x48, 0xB2, 0xEE,
elessair 0:f269e3021894 370 0x4E, 0xE7, 0xAD, 0x67 },
elessair 0:f269e3021894 371
elessair 0:f269e3021894 372 /*
elessair 0:f269e3021894 373 * SHA-256 test vectors
elessair 0:f269e3021894 374 */
elessair 0:f269e3021894 375 { 0xBA, 0x78, 0x16, 0xBF, 0x8F, 0x01, 0xCF, 0xEA,
elessair 0:f269e3021894 376 0x41, 0x41, 0x40, 0xDE, 0x5D, 0xAE, 0x22, 0x23,
elessair 0:f269e3021894 377 0xB0, 0x03, 0x61, 0xA3, 0x96, 0x17, 0x7A, 0x9C,
elessair 0:f269e3021894 378 0xB4, 0x10, 0xFF, 0x61, 0xF2, 0x00, 0x15, 0xAD },
elessair 0:f269e3021894 379 { 0x24, 0x8D, 0x6A, 0x61, 0xD2, 0x06, 0x38, 0xB8,
elessair 0:f269e3021894 380 0xE5, 0xC0, 0x26, 0x93, 0x0C, 0x3E, 0x60, 0x39,
elessair 0:f269e3021894 381 0xA3, 0x3C, 0xE4, 0x59, 0x64, 0xFF, 0x21, 0x67,
elessair 0:f269e3021894 382 0xF6, 0xEC, 0xED, 0xD4, 0x19, 0xDB, 0x06, 0xC1 },
elessair 0:f269e3021894 383 { 0xCD, 0xC7, 0x6E, 0x5C, 0x99, 0x14, 0xFB, 0x92,
elessair 0:f269e3021894 384 0x81, 0xA1, 0xC7, 0xE2, 0x84, 0xD7, 0x3E, 0x67,
elessair 0:f269e3021894 385 0xF1, 0x80, 0x9A, 0x48, 0xA4, 0x97, 0x20, 0x0E,
elessair 0:f269e3021894 386 0x04, 0x6D, 0x39, 0xCC, 0xC7, 0x11, 0x2C, 0xD0 }
elessair 0:f269e3021894 387 };
elessair 0:f269e3021894 388
elessair 0:f269e3021894 389 /*
elessair 0:f269e3021894 390 * Checkup routine
elessair 0:f269e3021894 391 */
elessair 0:f269e3021894 392 int mbedtls_sha256_self_test( int verbose )
elessair 0:f269e3021894 393 {
elessair 0:f269e3021894 394 int i, j, k, buflen, ret = 0;
elessair 0:f269e3021894 395 unsigned char *buf;
elessair 0:f269e3021894 396 unsigned char sha256sum[32];
elessair 0:f269e3021894 397 mbedtls_sha256_context ctx;
elessair 0:f269e3021894 398
elessair 0:f269e3021894 399 buf = mbedtls_calloc( 1024, sizeof(unsigned char) );
elessair 0:f269e3021894 400 if( NULL == buf )
elessair 0:f269e3021894 401 {
elessair 0:f269e3021894 402 if( verbose != 0 )
elessair 0:f269e3021894 403 mbedtls_printf( "Buffer allocation failed\n" );
elessair 0:f269e3021894 404
elessair 0:f269e3021894 405 return( 1 );
elessair 0:f269e3021894 406 }
elessair 0:f269e3021894 407
elessair 0:f269e3021894 408 mbedtls_sha256_init( &ctx );
elessair 0:f269e3021894 409
elessair 0:f269e3021894 410 for( i = 0; i < 6; i++ )
elessair 0:f269e3021894 411 {
elessair 0:f269e3021894 412 j = i % 3;
elessair 0:f269e3021894 413 k = i < 3;
elessair 0:f269e3021894 414
elessair 0:f269e3021894 415 if( verbose != 0 )
elessair 0:f269e3021894 416 mbedtls_printf( " SHA-%d test #%d: ", 256 - k * 32, j + 1 );
elessair 0:f269e3021894 417
elessair 0:f269e3021894 418 mbedtls_sha256_starts( &ctx, k );
elessair 0:f269e3021894 419
elessair 0:f269e3021894 420 if( j == 2 )
elessair 0:f269e3021894 421 {
elessair 0:f269e3021894 422 memset( buf, 'a', buflen = 1000 );
elessair 0:f269e3021894 423
elessair 0:f269e3021894 424 for( j = 0; j < 1000; j++ )
elessair 0:f269e3021894 425 mbedtls_sha256_update( &ctx, buf, buflen );
elessair 0:f269e3021894 426 }
elessair 0:f269e3021894 427 else
elessair 0:f269e3021894 428 mbedtls_sha256_update( &ctx, sha256_test_buf[j],
elessair 0:f269e3021894 429 sha256_test_buflen[j] );
elessair 0:f269e3021894 430
elessair 0:f269e3021894 431 mbedtls_sha256_finish( &ctx, sha256sum );
elessair 0:f269e3021894 432
elessair 0:f269e3021894 433 if( memcmp( sha256sum, sha256_test_sum[i], 32 - k * 4 ) != 0 )
elessair 0:f269e3021894 434 {
elessair 0:f269e3021894 435 if( verbose != 0 )
elessair 0:f269e3021894 436 mbedtls_printf( "failed\n" );
elessair 0:f269e3021894 437
elessair 0:f269e3021894 438 ret = 1;
elessair 0:f269e3021894 439 goto exit;
elessair 0:f269e3021894 440 }
elessair 0:f269e3021894 441
elessair 0:f269e3021894 442 if( verbose != 0 )
elessair 0:f269e3021894 443 mbedtls_printf( "passed\n" );
elessair 0:f269e3021894 444 }
elessair 0:f269e3021894 445
elessair 0:f269e3021894 446 if( verbose != 0 )
elessair 0:f269e3021894 447 mbedtls_printf( "\n" );
elessair 0:f269e3021894 448
elessair 0:f269e3021894 449 exit:
elessair 0:f269e3021894 450 mbedtls_sha256_free( &ctx );
elessair 0:f269e3021894 451 mbedtls_free( buf );
elessair 0:f269e3021894 452
elessair 0:f269e3021894 453 return( ret );
elessair 0:f269e3021894 454 }
elessair 0:f269e3021894 455
elessair 0:f269e3021894 456 #endif /* MBEDTLS_SELF_TEST */
elessair 0:f269e3021894 457
elessair 0:f269e3021894 458 #endif /* MBEDTLS_SHA256_C */