Kev Mann / mbed-dev-OS5_10_4

RTC auf true

features/mbedtls/src/sha256.c@0:38ceb79fef03, 2018-11-28 (annotated)

Committer:
kevman
Date:
Wed Nov 28 15:10:15 2018 +0000
Revision:
0:38ceb79fef03
RTC modified

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kevman 0:38ceb79fef03 1 /*
kevman 0:38ceb79fef03 2 * FIPS-180-2 compliant SHA-256 implementation
kevman 0:38ceb79fef03 3 *
kevman 0:38ceb79fef03 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
kevman 0:38ceb79fef03 5 * SPDX-License-Identifier: Apache-2.0
kevman 0:38ceb79fef03 6 *
kevman 0:38ceb79fef03 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
kevman 0:38ceb79fef03 8 * not use this file except in compliance with the License.
kevman 0:38ceb79fef03 9 * You may obtain a copy of the License at
kevman 0:38ceb79fef03 10 *
kevman 0:38ceb79fef03 11 * http://www.apache.org/licenses/LICENSE-2.0
kevman 0:38ceb79fef03 12 *
kevman 0:38ceb79fef03 13 * Unless required by applicable law or agreed to in writing, software
kevman 0:38ceb79fef03 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
kevman 0:38ceb79fef03 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
kevman 0:38ceb79fef03 16 * See the License for the specific language governing permissions and
kevman 0:38ceb79fef03 17 * limitations under the License.
kevman 0:38ceb79fef03 18 *
kevman 0:38ceb79fef03 19 * This file is part of mbed TLS (https://tls.mbed.org)
kevman 0:38ceb79fef03 20 */
kevman 0:38ceb79fef03 21 /*
kevman 0:38ceb79fef03 22 * The SHA-256 Secure Hash Standard was published by NIST in 2002.
kevman 0:38ceb79fef03 23 *
kevman 0:38ceb79fef03 24 * http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
kevman 0:38ceb79fef03 25 */
kevman 0:38ceb79fef03 26
kevman 0:38ceb79fef03 27 #if !defined(MBEDTLS_CONFIG_FILE)
kevman 0:38ceb79fef03 28 #include "mbedtls/config.h"
kevman 0:38ceb79fef03 29 #else
kevman 0:38ceb79fef03 30 #include MBEDTLS_CONFIG_FILE
kevman 0:38ceb79fef03 31 #endif
kevman 0:38ceb79fef03 32
kevman 0:38ceb79fef03 33 #if defined(MBEDTLS_SHA256_C)
kevman 0:38ceb79fef03 34
kevman 0:38ceb79fef03 35 #include "mbedtls/sha256.h"
kevman 0:38ceb79fef03 36 #include "mbedtls/platform_util.h"
kevman 0:38ceb79fef03 37
kevman 0:38ceb79fef03 38 #include <string.h>
kevman 0:38ceb79fef03 39
kevman 0:38ceb79fef03 40 #if defined(MBEDTLS_SELF_TEST)
kevman 0:38ceb79fef03 41 #if defined(MBEDTLS_PLATFORM_C)
kevman 0:38ceb79fef03 42 #include "mbedtls/platform.h"
kevman 0:38ceb79fef03 43 #else
kevman 0:38ceb79fef03 44 #include <stdio.h>
kevman 0:38ceb79fef03 45 #include <stdlib.h>
kevman 0:38ceb79fef03 46 #define mbedtls_printf printf
kevman 0:38ceb79fef03 47 #define mbedtls_calloc calloc
kevman 0:38ceb79fef03 48 #define mbedtls_free free
kevman 0:38ceb79fef03 49 #endif /* MBEDTLS_PLATFORM_C */
kevman 0:38ceb79fef03 50 #endif /* MBEDTLS_SELF_TEST */
kevman 0:38ceb79fef03 51
kevman 0:38ceb79fef03 52 #if !defined(MBEDTLS_SHA256_ALT)
kevman 0:38ceb79fef03 53
kevman 0:38ceb79fef03 54 /*
kevman 0:38ceb79fef03 55 * 32-bit integer manipulation macros (big endian)
kevman 0:38ceb79fef03 56 */
kevman 0:38ceb79fef03 57 #ifndef GET_UINT32_BE
kevman 0:38ceb79fef03 58 #define GET_UINT32_BE(n,b,i) \
kevman 0:38ceb79fef03 59 do { \
kevman 0:38ceb79fef03 60 (n) = ( (uint32_t) (b)[(i) ] << 24 ) \
kevman 0:38ceb79fef03 61 | ( (uint32_t) (b)[(i) + 1] << 16 ) \
kevman 0:38ceb79fef03 62 | ( (uint32_t) (b)[(i) + 2] << 8 ) \
kevman 0:38ceb79fef03 63 | ( (uint32_t) (b)[(i) + 3] ); \
kevman 0:38ceb79fef03 64 } while( 0 )
kevman 0:38ceb79fef03 65 #endif
kevman 0:38ceb79fef03 66
kevman 0:38ceb79fef03 67 #ifndef PUT_UINT32_BE
kevman 0:38ceb79fef03 68 #define PUT_UINT32_BE(n,b,i) \
kevman 0:38ceb79fef03 69 do { \
kevman 0:38ceb79fef03 70 (b)[(i) ] = (unsigned char) ( (n) >> 24 ); \
kevman 0:38ceb79fef03 71 (b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \
kevman 0:38ceb79fef03 72 (b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \
kevman 0:38ceb79fef03 73 (b)[(i) + 3] = (unsigned char) ( (n) ); \
kevman 0:38ceb79fef03 74 } while( 0 )
kevman 0:38ceb79fef03 75 #endif
kevman 0:38ceb79fef03 76
kevman 0:38ceb79fef03 77 void mbedtls_sha256_init( mbedtls_sha256_context *ctx )
kevman 0:38ceb79fef03 78 {
kevman 0:38ceb79fef03 79 memset( ctx, 0, sizeof( mbedtls_sha256_context ) );
kevman 0:38ceb79fef03 80 }
kevman 0:38ceb79fef03 81
kevman 0:38ceb79fef03 82 void mbedtls_sha256_free( mbedtls_sha256_context *ctx )
kevman 0:38ceb79fef03 83 {
kevman 0:38ceb79fef03 84 if( ctx == NULL )
kevman 0:38ceb79fef03 85 return;
kevman 0:38ceb79fef03 86
kevman 0:38ceb79fef03 87 mbedtls_platform_zeroize( ctx, sizeof( mbedtls_sha256_context ) );
kevman 0:38ceb79fef03 88 }
kevman 0:38ceb79fef03 89
kevman 0:38ceb79fef03 90 void mbedtls_sha256_clone( mbedtls_sha256_context *dst,
kevman 0:38ceb79fef03 91 const mbedtls_sha256_context *src )
kevman 0:38ceb79fef03 92 {
kevman 0:38ceb79fef03 93 *dst = *src;
kevman 0:38ceb79fef03 94 }
kevman 0:38ceb79fef03 95
kevman 0:38ceb79fef03 96 /*
kevman 0:38ceb79fef03 97 * SHA-256 context setup
kevman 0:38ceb79fef03 98 */
kevman 0:38ceb79fef03 99 int mbedtls_sha256_starts_ret( mbedtls_sha256_context *ctx, int is224 )
kevman 0:38ceb79fef03 100 {
kevman 0:38ceb79fef03 101 ctx->total[0] = 0;
kevman 0:38ceb79fef03 102 ctx->total[1] = 0;
kevman 0:38ceb79fef03 103
kevman 0:38ceb79fef03 104 if( is224 == 0 )
kevman 0:38ceb79fef03 105 {
kevman 0:38ceb79fef03 106 /* SHA-256 */
kevman 0:38ceb79fef03 107 ctx->state[0] = 0x6A09E667;
kevman 0:38ceb79fef03 108 ctx->state[1] = 0xBB67AE85;
kevman 0:38ceb79fef03 109 ctx->state[2] = 0x3C6EF372;
kevman 0:38ceb79fef03 110 ctx->state[3] = 0xA54FF53A;
kevman 0:38ceb79fef03 111 ctx->state[4] = 0x510E527F;
kevman 0:38ceb79fef03 112 ctx->state[5] = 0x9B05688C;
kevman 0:38ceb79fef03 113 ctx->state[6] = 0x1F83D9AB;
kevman 0:38ceb79fef03 114 ctx->state[7] = 0x5BE0CD19;
kevman 0:38ceb79fef03 115 }
kevman 0:38ceb79fef03 116 else
kevman 0:38ceb79fef03 117 {
kevman 0:38ceb79fef03 118 /* SHA-224 */
kevman 0:38ceb79fef03 119 ctx->state[0] = 0xC1059ED8;
kevman 0:38ceb79fef03 120 ctx->state[1] = 0x367CD507;
kevman 0:38ceb79fef03 121 ctx->state[2] = 0x3070DD17;
kevman 0:38ceb79fef03 122 ctx->state[3] = 0xF70E5939;
kevman 0:38ceb79fef03 123 ctx->state[4] = 0xFFC00B31;
kevman 0:38ceb79fef03 124 ctx->state[5] = 0x68581511;
kevman 0:38ceb79fef03 125 ctx->state[6] = 0x64F98FA7;
kevman 0:38ceb79fef03 126 ctx->state[7] = 0xBEFA4FA4;
kevman 0:38ceb79fef03 127 }
kevman 0:38ceb79fef03 128
kevman 0:38ceb79fef03 129 ctx->is224 = is224;
kevman 0:38ceb79fef03 130
kevman 0:38ceb79fef03 131 return( 0 );
kevman 0:38ceb79fef03 132 }
kevman 0:38ceb79fef03 133
kevman 0:38ceb79fef03 134 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
kevman 0:38ceb79fef03 135 void mbedtls_sha256_starts( mbedtls_sha256_context *ctx,
kevman 0:38ceb79fef03 136 int is224 )
kevman 0:38ceb79fef03 137 {
kevman 0:38ceb79fef03 138 mbedtls_sha256_starts_ret( ctx, is224 );
kevman 0:38ceb79fef03 139 }
kevman 0:38ceb79fef03 140 #endif
kevman 0:38ceb79fef03 141
kevman 0:38ceb79fef03 142 #if !defined(MBEDTLS_SHA256_PROCESS_ALT)
kevman 0:38ceb79fef03 143 static const uint32_t K[] =
kevman 0:38ceb79fef03 144 {
kevman 0:38ceb79fef03 145 0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5,
kevman 0:38ceb79fef03 146 0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5,
kevman 0:38ceb79fef03 147 0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3,
kevman 0:38ceb79fef03 148 0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174,
kevman 0:38ceb79fef03 149 0xE49B69C1, 0xEFBE4786, 0x0FC19DC6, 0x240CA1CC,
kevman 0:38ceb79fef03 150 0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA,
kevman 0:38ceb79fef03 151 0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7,
kevman 0:38ceb79fef03 152 0xC6E00BF3, 0xD5A79147, 0x06CA6351, 0x14292967,
kevman 0:38ceb79fef03 153 0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13,
kevman 0:38ceb79fef03 154 0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85,
kevman 0:38ceb79fef03 155 0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3,
kevman 0:38ceb79fef03 156 0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070,
kevman 0:38ceb79fef03 157 0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5,
kevman 0:38ceb79fef03 158 0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3,
kevman 0:38ceb79fef03 159 0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208,
kevman 0:38ceb79fef03 160 0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2,
kevman 0:38ceb79fef03 161 };
kevman 0:38ceb79fef03 162
kevman 0:38ceb79fef03 163 #define SHR(x,n) ((x & 0xFFFFFFFF) >> n)
kevman 0:38ceb79fef03 164 #define ROTR(x,n) (SHR(x,n) | (x << (32 - n)))
kevman 0:38ceb79fef03 165
kevman 0:38ceb79fef03 166 #define S0(x) (ROTR(x, 7) ^ ROTR(x,18) ^ SHR(x, 3))
kevman 0:38ceb79fef03 167 #define S1(x) (ROTR(x,17) ^ ROTR(x,19) ^ SHR(x,10))
kevman 0:38ceb79fef03 168
kevman 0:38ceb79fef03 169 #define S2(x) (ROTR(x, 2) ^ ROTR(x,13) ^ ROTR(x,22))
kevman 0:38ceb79fef03 170 #define S3(x) (ROTR(x, 6) ^ ROTR(x,11) ^ ROTR(x,25))
kevman 0:38ceb79fef03 171
kevman 0:38ceb79fef03 172 #define F0(x,y,z) ((x & y) | (z & (x | y)))
kevman 0:38ceb79fef03 173 #define F1(x,y,z) (z ^ (x & (y ^ z)))
kevman 0:38ceb79fef03 174
kevman 0:38ceb79fef03 175 #define R(t) \
kevman 0:38ceb79fef03 176 ( \
kevman 0:38ceb79fef03 177 W[t] = S1(W[t - 2]) + W[t - 7] + \
kevman 0:38ceb79fef03 178 S0(W[t - 15]) + W[t - 16] \
kevman 0:38ceb79fef03 179 )
kevman 0:38ceb79fef03 180
kevman 0:38ceb79fef03 181 #define P(a,b,c,d,e,f,g,h,x,K) \
kevman 0:38ceb79fef03 182 { \
kevman 0:38ceb79fef03 183 temp1 = h + S3(e) + F1(e,f,g) + K + x; \
kevman 0:38ceb79fef03 184 temp2 = S2(a) + F0(a,b,c); \
kevman 0:38ceb79fef03 185 d += temp1; h = temp1 + temp2; \
kevman 0:38ceb79fef03 186 }
kevman 0:38ceb79fef03 187
kevman 0:38ceb79fef03 188 int mbedtls_internal_sha256_process( mbedtls_sha256_context *ctx,
kevman 0:38ceb79fef03 189 const unsigned char data[64] )
kevman 0:38ceb79fef03 190 {
kevman 0:38ceb79fef03 191 uint32_t temp1, temp2, W[64];
kevman 0:38ceb79fef03 192 uint32_t A[8];
kevman 0:38ceb79fef03 193 unsigned int i;
kevman 0:38ceb79fef03 194
kevman 0:38ceb79fef03 195 for( i = 0; i < 8; i++ )
kevman 0:38ceb79fef03 196 A[i] = ctx->state[i];
kevman 0:38ceb79fef03 197
kevman 0:38ceb79fef03 198 #if defined(MBEDTLS_SHA256_SMALLER)
kevman 0:38ceb79fef03 199 for( i = 0; i < 64; i++ )
kevman 0:38ceb79fef03 200 {
kevman 0:38ceb79fef03 201 if( i < 16 )
kevman 0:38ceb79fef03 202 GET_UINT32_BE( W[i], data, 4 * i );
kevman 0:38ceb79fef03 203 else
kevman 0:38ceb79fef03 204 R( i );
kevman 0:38ceb79fef03 205
kevman 0:38ceb79fef03 206 P( A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], W[i], K[i] );
kevman 0:38ceb79fef03 207
kevman 0:38ceb79fef03 208 temp1 = A[7]; A[7] = A[6]; A[6] = A[5]; A[5] = A[4]; A[4] = A[3];
kevman 0:38ceb79fef03 209 A[3] = A[2]; A[2] = A[1]; A[1] = A[0]; A[0] = temp1;
kevman 0:38ceb79fef03 210 }
kevman 0:38ceb79fef03 211 #else /* MBEDTLS_SHA256_SMALLER */
kevman 0:38ceb79fef03 212 for( i = 0; i < 16; i++ )
kevman 0:38ceb79fef03 213 GET_UINT32_BE( W[i], data, 4 * i );
kevman 0:38ceb79fef03 214
kevman 0:38ceb79fef03 215 for( i = 0; i < 16; i += 8 )
kevman 0:38ceb79fef03 216 {
kevman 0:38ceb79fef03 217 P( A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], W[i+0], K[i+0] );
kevman 0:38ceb79fef03 218 P( A[7], A[0], A[1], A[2], A[3], A[4], A[5], A[6], W[i+1], K[i+1] );
kevman 0:38ceb79fef03 219 P( A[6], A[7], A[0], A[1], A[2], A[3], A[4], A[5], W[i+2], K[i+2] );
kevman 0:38ceb79fef03 220 P( A[5], A[6], A[7], A[0], A[1], A[2], A[3], A[4], W[i+3], K[i+3] );
kevman 0:38ceb79fef03 221 P( A[4], A[5], A[6], A[7], A[0], A[1], A[2], A[3], W[i+4], K[i+4] );
kevman 0:38ceb79fef03 222 P( A[3], A[4], A[5], A[6], A[7], A[0], A[1], A[2], W[i+5], K[i+5] );
kevman 0:38ceb79fef03 223 P( A[2], A[3], A[4], A[5], A[6], A[7], A[0], A[1], W[i+6], K[i+6] );
kevman 0:38ceb79fef03 224 P( A[1], A[2], A[3], A[4], A[5], A[6], A[7], A[0], W[i+7], K[i+7] );
kevman 0:38ceb79fef03 225 }
kevman 0:38ceb79fef03 226
kevman 0:38ceb79fef03 227 for( i = 16; i < 64; i += 8 )
kevman 0:38ceb79fef03 228 {
kevman 0:38ceb79fef03 229 P( A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], R(i+0), K[i+0] );
kevman 0:38ceb79fef03 230 P( A[7], A[0], A[1], A[2], A[3], A[4], A[5], A[6], R(i+1), K[i+1] );
kevman 0:38ceb79fef03 231 P( A[6], A[7], A[0], A[1], A[2], A[3], A[4], A[5], R(i+2), K[i+2] );
kevman 0:38ceb79fef03 232 P( A[5], A[6], A[7], A[0], A[1], A[2], A[3], A[4], R(i+3), K[i+3] );
kevman 0:38ceb79fef03 233 P( A[4], A[5], A[6], A[7], A[0], A[1], A[2], A[3], R(i+4), K[i+4] );
kevman 0:38ceb79fef03 234 P( A[3], A[4], A[5], A[6], A[7], A[0], A[1], A[2], R(i+5), K[i+5] );
kevman 0:38ceb79fef03 235 P( A[2], A[3], A[4], A[5], A[6], A[7], A[0], A[1], R(i+6), K[i+6] );
kevman 0:38ceb79fef03 236 P( A[1], A[2], A[3], A[4], A[5], A[6], A[7], A[0], R(i+7), K[i+7] );
kevman 0:38ceb79fef03 237 }
kevman 0:38ceb79fef03 238 #endif /* MBEDTLS_SHA256_SMALLER */
kevman 0:38ceb79fef03 239
kevman 0:38ceb79fef03 240 for( i = 0; i < 8; i++ )
kevman 0:38ceb79fef03 241 ctx->state[i] += A[i];
kevman 0:38ceb79fef03 242
kevman 0:38ceb79fef03 243 return( 0 );
kevman 0:38ceb79fef03 244 }
kevman 0:38ceb79fef03 245
kevman 0:38ceb79fef03 246 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
kevman 0:38ceb79fef03 247 void mbedtls_sha256_process( mbedtls_sha256_context *ctx,
kevman 0:38ceb79fef03 248 const unsigned char data[64] )
kevman 0:38ceb79fef03 249 {
kevman 0:38ceb79fef03 250 mbedtls_internal_sha256_process( ctx, data );
kevman 0:38ceb79fef03 251 }
kevman 0:38ceb79fef03 252 #endif
kevman 0:38ceb79fef03 253 #endif /* !MBEDTLS_SHA256_PROCESS_ALT */
kevman 0:38ceb79fef03 254
kevman 0:38ceb79fef03 255 /*
kevman 0:38ceb79fef03 256 * SHA-256 process buffer
kevman 0:38ceb79fef03 257 */
kevman 0:38ceb79fef03 258 int mbedtls_sha256_update_ret( mbedtls_sha256_context *ctx,
kevman 0:38ceb79fef03 259 const unsigned char *input,
kevman 0:38ceb79fef03 260 size_t ilen )
kevman 0:38ceb79fef03 261 {
kevman 0:38ceb79fef03 262 int ret;
kevman 0:38ceb79fef03 263 size_t fill;
kevman 0:38ceb79fef03 264 uint32_t left;
kevman 0:38ceb79fef03 265
kevman 0:38ceb79fef03 266 if( ilen == 0 )
kevman 0:38ceb79fef03 267 return( 0 );
kevman 0:38ceb79fef03 268
kevman 0:38ceb79fef03 269 left = ctx->total[0] & 0x3F;
kevman 0:38ceb79fef03 270 fill = 64 - left;
kevman 0:38ceb79fef03 271
kevman 0:38ceb79fef03 272 ctx->total[0] += (uint32_t) ilen;
kevman 0:38ceb79fef03 273 ctx->total[0] &= 0xFFFFFFFF;
kevman 0:38ceb79fef03 274
kevman 0:38ceb79fef03 275 if( ctx->total[0] < (uint32_t) ilen )
kevman 0:38ceb79fef03 276 ctx->total[1]++;
kevman 0:38ceb79fef03 277
kevman 0:38ceb79fef03 278 if( left && ilen >= fill )
kevman 0:38ceb79fef03 279 {
kevman 0:38ceb79fef03 280 memcpy( (void *) (ctx->buffer + left), input, fill );
kevman 0:38ceb79fef03 281
kevman 0:38ceb79fef03 282 if( ( ret = mbedtls_internal_sha256_process( ctx, ctx->buffer ) ) != 0 )
kevman 0:38ceb79fef03 283 return( ret );
kevman 0:38ceb79fef03 284
kevman 0:38ceb79fef03 285 input += fill;
kevman 0:38ceb79fef03 286 ilen -= fill;
kevman 0:38ceb79fef03 287 left = 0;
kevman 0:38ceb79fef03 288 }
kevman 0:38ceb79fef03 289
kevman 0:38ceb79fef03 290 while( ilen >= 64 )
kevman 0:38ceb79fef03 291 {
kevman 0:38ceb79fef03 292 if( ( ret = mbedtls_internal_sha256_process( ctx, input ) ) != 0 )
kevman 0:38ceb79fef03 293 return( ret );
kevman 0:38ceb79fef03 294
kevman 0:38ceb79fef03 295 input += 64;
kevman 0:38ceb79fef03 296 ilen -= 64;
kevman 0:38ceb79fef03 297 }
kevman 0:38ceb79fef03 298
kevman 0:38ceb79fef03 299 if( ilen > 0 )
kevman 0:38ceb79fef03 300 memcpy( (void *) (ctx->buffer + left), input, ilen );
kevman 0:38ceb79fef03 301
kevman 0:38ceb79fef03 302 return( 0 );
kevman 0:38ceb79fef03 303 }
kevman 0:38ceb79fef03 304
kevman 0:38ceb79fef03 305 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
kevman 0:38ceb79fef03 306 void mbedtls_sha256_update( mbedtls_sha256_context *ctx,
kevman 0:38ceb79fef03 307 const unsigned char *input,
kevman 0:38ceb79fef03 308 size_t ilen )
kevman 0:38ceb79fef03 309 {
kevman 0:38ceb79fef03 310 mbedtls_sha256_update_ret( ctx, input, ilen );
kevman 0:38ceb79fef03 311 }
kevman 0:38ceb79fef03 312 #endif
kevman 0:38ceb79fef03 313
kevman 0:38ceb79fef03 314 /*
kevman 0:38ceb79fef03 315 * SHA-256 final digest
kevman 0:38ceb79fef03 316 */
kevman 0:38ceb79fef03 317 int mbedtls_sha256_finish_ret( mbedtls_sha256_context *ctx,
kevman 0:38ceb79fef03 318 unsigned char output[32] )
kevman 0:38ceb79fef03 319 {
kevman 0:38ceb79fef03 320 int ret;
kevman 0:38ceb79fef03 321 uint32_t used;
kevman 0:38ceb79fef03 322 uint32_t high, low;
kevman 0:38ceb79fef03 323
kevman 0:38ceb79fef03 324 /*
kevman 0:38ceb79fef03 325 * Add padding: 0x80 then 0x00 until 8 bytes remain for the length
kevman 0:38ceb79fef03 326 */
kevman 0:38ceb79fef03 327 used = ctx->total[0] & 0x3F;
kevman 0:38ceb79fef03 328
kevman 0:38ceb79fef03 329 ctx->buffer[used++] = 0x80;
kevman 0:38ceb79fef03 330
kevman 0:38ceb79fef03 331 if( used <= 56 )
kevman 0:38ceb79fef03 332 {
kevman 0:38ceb79fef03 333 /* Enough room for padding + length in current block */
kevman 0:38ceb79fef03 334 memset( ctx->buffer + used, 0, 56 - used );
kevman 0:38ceb79fef03 335 }
kevman 0:38ceb79fef03 336 else
kevman 0:38ceb79fef03 337 {
kevman 0:38ceb79fef03 338 /* We'll need an extra block */
kevman 0:38ceb79fef03 339 memset( ctx->buffer + used, 0, 64 - used );
kevman 0:38ceb79fef03 340
kevman 0:38ceb79fef03 341 if( ( ret = mbedtls_internal_sha256_process( ctx, ctx->buffer ) ) != 0 )
kevman 0:38ceb79fef03 342 return( ret );
kevman 0:38ceb79fef03 343
kevman 0:38ceb79fef03 344 memset( ctx->buffer, 0, 56 );
kevman 0:38ceb79fef03 345 }
kevman 0:38ceb79fef03 346
kevman 0:38ceb79fef03 347 /*
kevman 0:38ceb79fef03 348 * Add message length
kevman 0:38ceb79fef03 349 */
kevman 0:38ceb79fef03 350 high = ( ctx->total[0] >> 29 )
kevman 0:38ceb79fef03 351 | ( ctx->total[1] << 3 );
kevman 0:38ceb79fef03 352 low = ( ctx->total[0] << 3 );
kevman 0:38ceb79fef03 353
kevman 0:38ceb79fef03 354 PUT_UINT32_BE( high, ctx->buffer, 56 );
kevman 0:38ceb79fef03 355 PUT_UINT32_BE( low, ctx->buffer, 60 );
kevman 0:38ceb79fef03 356
kevman 0:38ceb79fef03 357 if( ( ret = mbedtls_internal_sha256_process( ctx, ctx->buffer ) ) != 0 )
kevman 0:38ceb79fef03 358 return( ret );
kevman 0:38ceb79fef03 359
kevman 0:38ceb79fef03 360 /*
kevman 0:38ceb79fef03 361 * Output final state
kevman 0:38ceb79fef03 362 */
kevman 0:38ceb79fef03 363 PUT_UINT32_BE( ctx->state[0], output, 0 );
kevman 0:38ceb79fef03 364 PUT_UINT32_BE( ctx->state[1], output, 4 );
kevman 0:38ceb79fef03 365 PUT_UINT32_BE( ctx->state[2], output, 8 );
kevman 0:38ceb79fef03 366 PUT_UINT32_BE( ctx->state[3], output, 12 );
kevman 0:38ceb79fef03 367 PUT_UINT32_BE( ctx->state[4], output, 16 );
kevman 0:38ceb79fef03 368 PUT_UINT32_BE( ctx->state[5], output, 20 );
kevman 0:38ceb79fef03 369 PUT_UINT32_BE( ctx->state[6], output, 24 );
kevman 0:38ceb79fef03 370
kevman 0:38ceb79fef03 371 if( ctx->is224 == 0 )
kevman 0:38ceb79fef03 372 PUT_UINT32_BE( ctx->state[7], output, 28 );
kevman 0:38ceb79fef03 373
kevman 0:38ceb79fef03 374 return( 0 );
kevman 0:38ceb79fef03 375 }
kevman 0:38ceb79fef03 376
kevman 0:38ceb79fef03 377 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
kevman 0:38ceb79fef03 378 void mbedtls_sha256_finish( mbedtls_sha256_context *ctx,
kevman 0:38ceb79fef03 379 unsigned char output[32] )
kevman 0:38ceb79fef03 380 {
kevman 0:38ceb79fef03 381 mbedtls_sha256_finish_ret( ctx, output );
kevman 0:38ceb79fef03 382 }
kevman 0:38ceb79fef03 383 #endif
kevman 0:38ceb79fef03 384
kevman 0:38ceb79fef03 385 #endif /* !MBEDTLS_SHA256_ALT */
kevman 0:38ceb79fef03 386
kevman 0:38ceb79fef03 387 /*
kevman 0:38ceb79fef03 388 * output = SHA-256( input buffer )
kevman 0:38ceb79fef03 389 */
kevman 0:38ceb79fef03 390 int mbedtls_sha256_ret( const unsigned char *input,
kevman 0:38ceb79fef03 391 size_t ilen,
kevman 0:38ceb79fef03 392 unsigned char output[32],
kevman 0:38ceb79fef03 393 int is224 )
kevman 0:38ceb79fef03 394 {
kevman 0:38ceb79fef03 395 int ret;
kevman 0:38ceb79fef03 396 mbedtls_sha256_context ctx;
kevman 0:38ceb79fef03 397
kevman 0:38ceb79fef03 398 mbedtls_sha256_init( &ctx );
kevman 0:38ceb79fef03 399
kevman 0:38ceb79fef03 400 if( ( ret = mbedtls_sha256_starts_ret( &ctx, is224 ) ) != 0 )
kevman 0:38ceb79fef03 401 goto exit;
kevman 0:38ceb79fef03 402
kevman 0:38ceb79fef03 403 if( ( ret = mbedtls_sha256_update_ret( &ctx, input, ilen ) ) != 0 )
kevman 0:38ceb79fef03 404 goto exit;
kevman 0:38ceb79fef03 405
kevman 0:38ceb79fef03 406 if( ( ret = mbedtls_sha256_finish_ret( &ctx, output ) ) != 0 )
kevman 0:38ceb79fef03 407 goto exit;
kevman 0:38ceb79fef03 408
kevman 0:38ceb79fef03 409 exit:
kevman 0:38ceb79fef03 410 mbedtls_sha256_free( &ctx );
kevman 0:38ceb79fef03 411
kevman 0:38ceb79fef03 412 return( ret );
kevman 0:38ceb79fef03 413 }
kevman 0:38ceb79fef03 414
kevman 0:38ceb79fef03 415 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
kevman 0:38ceb79fef03 416 void mbedtls_sha256( const unsigned char *input,
kevman 0:38ceb79fef03 417 size_t ilen,
kevman 0:38ceb79fef03 418 unsigned char output[32],
kevman 0:38ceb79fef03 419 int is224 )
kevman 0:38ceb79fef03 420 {
kevman 0:38ceb79fef03 421 mbedtls_sha256_ret( input, ilen, output, is224 );
kevman 0:38ceb79fef03 422 }
kevman 0:38ceb79fef03 423 #endif
kevman 0:38ceb79fef03 424
kevman 0:38ceb79fef03 425 #if defined(MBEDTLS_SELF_TEST)
kevman 0:38ceb79fef03 426 /*
kevman 0:38ceb79fef03 427 * FIPS-180-2 test vectors
kevman 0:38ceb79fef03 428 */
kevman 0:38ceb79fef03 429 static const unsigned char sha256_test_buf[3][57] =
kevman 0:38ceb79fef03 430 {
kevman 0:38ceb79fef03 431 { "abc" },
kevman 0:38ceb79fef03 432 { "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" },
kevman 0:38ceb79fef03 433 { "" }
kevman 0:38ceb79fef03 434 };
kevman 0:38ceb79fef03 435
kevman 0:38ceb79fef03 436 static const size_t sha256_test_buflen[3] =
kevman 0:38ceb79fef03 437 {
kevman 0:38ceb79fef03 438 3, 56, 1000
kevman 0:38ceb79fef03 439 };
kevman 0:38ceb79fef03 440
kevman 0:38ceb79fef03 441 static const unsigned char sha256_test_sum[6][32] =
kevman 0:38ceb79fef03 442 {
kevman 0:38ceb79fef03 443 /*
kevman 0:38ceb79fef03 444 * SHA-224 test vectors
kevman 0:38ceb79fef03 445 */
kevman 0:38ceb79fef03 446 { 0x23, 0x09, 0x7D, 0x22, 0x34, 0x05, 0xD8, 0x22,
kevman 0:38ceb79fef03 447 0x86, 0x42, 0xA4, 0x77, 0xBD, 0xA2, 0x55, 0xB3,
kevman 0:38ceb79fef03 448 0x2A, 0xAD, 0xBC, 0xE4, 0xBD, 0xA0, 0xB3, 0xF7,
kevman 0:38ceb79fef03 449 0xE3, 0x6C, 0x9D, 0xA7 },
kevman 0:38ceb79fef03 450 { 0x75, 0x38, 0x8B, 0x16, 0x51, 0x27, 0x76, 0xCC,
kevman 0:38ceb79fef03 451 0x5D, 0xBA, 0x5D, 0xA1, 0xFD, 0x89, 0x01, 0x50,
kevman 0:38ceb79fef03 452 0xB0, 0xC6, 0x45, 0x5C, 0xB4, 0xF5, 0x8B, 0x19,
kevman 0:38ceb79fef03 453 0x52, 0x52, 0x25, 0x25 },
kevman 0:38ceb79fef03 454 { 0x20, 0x79, 0x46, 0x55, 0x98, 0x0C, 0x91, 0xD8,
kevman 0:38ceb79fef03 455 0xBB, 0xB4, 0xC1, 0xEA, 0x97, 0x61, 0x8A, 0x4B,
kevman 0:38ceb79fef03 456 0xF0, 0x3F, 0x42, 0x58, 0x19, 0x48, 0xB2, 0xEE,
kevman 0:38ceb79fef03 457 0x4E, 0xE7, 0xAD, 0x67 },
kevman 0:38ceb79fef03 458
kevman 0:38ceb79fef03 459 /*
kevman 0:38ceb79fef03 460 * SHA-256 test vectors
kevman 0:38ceb79fef03 461 */
kevman 0:38ceb79fef03 462 { 0xBA, 0x78, 0x16, 0xBF, 0x8F, 0x01, 0xCF, 0xEA,
kevman 0:38ceb79fef03 463 0x41, 0x41, 0x40, 0xDE, 0x5D, 0xAE, 0x22, 0x23,
kevman 0:38ceb79fef03 464 0xB0, 0x03, 0x61, 0xA3, 0x96, 0x17, 0x7A, 0x9C,
kevman 0:38ceb79fef03 465 0xB4, 0x10, 0xFF, 0x61, 0xF2, 0x00, 0x15, 0xAD },
kevman 0:38ceb79fef03 466 { 0x24, 0x8D, 0x6A, 0x61, 0xD2, 0x06, 0x38, 0xB8,
kevman 0:38ceb79fef03 467 0xE5, 0xC0, 0x26, 0x93, 0x0C, 0x3E, 0x60, 0x39,
kevman 0:38ceb79fef03 468 0xA3, 0x3C, 0xE4, 0x59, 0x64, 0xFF, 0x21, 0x67,
kevman 0:38ceb79fef03 469 0xF6, 0xEC, 0xED, 0xD4, 0x19, 0xDB, 0x06, 0xC1 },
kevman 0:38ceb79fef03 470 { 0xCD, 0xC7, 0x6E, 0x5C, 0x99, 0x14, 0xFB, 0x92,
kevman 0:38ceb79fef03 471 0x81, 0xA1, 0xC7, 0xE2, 0x84, 0xD7, 0x3E, 0x67,
kevman 0:38ceb79fef03 472 0xF1, 0x80, 0x9A, 0x48, 0xA4, 0x97, 0x20, 0x0E,
kevman 0:38ceb79fef03 473 0x04, 0x6D, 0x39, 0xCC, 0xC7, 0x11, 0x2C, 0xD0 }
kevman 0:38ceb79fef03 474 };
kevman 0:38ceb79fef03 475
kevman 0:38ceb79fef03 476 /*
kevman 0:38ceb79fef03 477 * Checkup routine
kevman 0:38ceb79fef03 478 */
kevman 0:38ceb79fef03 479 int mbedtls_sha256_self_test( int verbose )
kevman 0:38ceb79fef03 480 {
kevman 0:38ceb79fef03 481 int i, j, k, buflen, ret = 0;
kevman 0:38ceb79fef03 482 unsigned char *buf;
kevman 0:38ceb79fef03 483 unsigned char sha256sum[32];
kevman 0:38ceb79fef03 484 mbedtls_sha256_context ctx;
kevman 0:38ceb79fef03 485
kevman 0:38ceb79fef03 486 buf = mbedtls_calloc( 1024, sizeof(unsigned char) );
kevman 0:38ceb79fef03 487 if( NULL == buf )
kevman 0:38ceb79fef03 488 {
kevman 0:38ceb79fef03 489 if( verbose != 0 )
kevman 0:38ceb79fef03 490 mbedtls_printf( "Buffer allocation failed\n" );
kevman 0:38ceb79fef03 491
kevman 0:38ceb79fef03 492 return( 1 );
kevman 0:38ceb79fef03 493 }
kevman 0:38ceb79fef03 494
kevman 0:38ceb79fef03 495 mbedtls_sha256_init( &ctx );
kevman 0:38ceb79fef03 496
kevman 0:38ceb79fef03 497 for( i = 0; i < 6; i++ )
kevman 0:38ceb79fef03 498 {
kevman 0:38ceb79fef03 499 j = i % 3;
kevman 0:38ceb79fef03 500 k = i < 3;
kevman 0:38ceb79fef03 501
kevman 0:38ceb79fef03 502 if( verbose != 0 )
kevman 0:38ceb79fef03 503 mbedtls_printf( " SHA-%d test #%d: ", 256 - k * 32, j + 1 );
kevman 0:38ceb79fef03 504
kevman 0:38ceb79fef03 505 if( ( ret = mbedtls_sha256_starts_ret( &ctx, k ) ) != 0 )
kevman 0:38ceb79fef03 506 goto fail;
kevman 0:38ceb79fef03 507
kevman 0:38ceb79fef03 508 if( j == 2 )
kevman 0:38ceb79fef03 509 {
kevman 0:38ceb79fef03 510 memset( buf, 'a', buflen = 1000 );
kevman 0:38ceb79fef03 511
kevman 0:38ceb79fef03 512 for( j = 0; j < 1000; j++ )
kevman 0:38ceb79fef03 513 {
kevman 0:38ceb79fef03 514 ret = mbedtls_sha256_update_ret( &ctx, buf, buflen );
kevman 0:38ceb79fef03 515 if( ret != 0 )
kevman 0:38ceb79fef03 516 goto fail;
kevman 0:38ceb79fef03 517 }
kevman 0:38ceb79fef03 518
kevman 0:38ceb79fef03 519 }
kevman 0:38ceb79fef03 520 else
kevman 0:38ceb79fef03 521 {
kevman 0:38ceb79fef03 522 ret = mbedtls_sha256_update_ret( &ctx, sha256_test_buf[j],
kevman 0:38ceb79fef03 523 sha256_test_buflen[j] );
kevman 0:38ceb79fef03 524 if( ret != 0 )
kevman 0:38ceb79fef03 525 goto fail;
kevman 0:38ceb79fef03 526 }
kevman 0:38ceb79fef03 527
kevman 0:38ceb79fef03 528 if( ( ret = mbedtls_sha256_finish_ret( &ctx, sha256sum ) ) != 0 )
kevman 0:38ceb79fef03 529 goto fail;
kevman 0:38ceb79fef03 530
kevman 0:38ceb79fef03 531
kevman 0:38ceb79fef03 532 if( memcmp( sha256sum, sha256_test_sum[i], 32 - k * 4 ) != 0 )
kevman 0:38ceb79fef03 533 {
kevman 0:38ceb79fef03 534 ret = 1;
kevman 0:38ceb79fef03 535 goto fail;
kevman 0:38ceb79fef03 536 }
kevman 0:38ceb79fef03 537
kevman 0:38ceb79fef03 538 if( verbose != 0 )
kevman 0:38ceb79fef03 539 mbedtls_printf( "passed\n" );
kevman 0:38ceb79fef03 540 }
kevman 0:38ceb79fef03 541
kevman 0:38ceb79fef03 542 if( verbose != 0 )
kevman 0:38ceb79fef03 543 mbedtls_printf( "\n" );
kevman 0:38ceb79fef03 544
kevman 0:38ceb79fef03 545 goto exit;
kevman 0:38ceb79fef03 546
kevman 0:38ceb79fef03 547 fail:
kevman 0:38ceb79fef03 548 if( verbose != 0 )
kevman 0:38ceb79fef03 549 mbedtls_printf( "failed\n" );
kevman 0:38ceb79fef03 550
kevman 0:38ceb79fef03 551 exit:
kevman 0:38ceb79fef03 552 mbedtls_sha256_free( &ctx );
kevman 0:38ceb79fef03 553 mbedtls_free( buf );
kevman 0:38ceb79fef03 554
kevman 0:38ceb79fef03 555 return( ret );
kevman 0:38ceb79fef03 556 }
kevman 0:38ceb79fef03 557
kevman 0:38ceb79fef03 558 #endif /* MBEDTLS_SELF_TEST */
kevman 0:38ceb79fef03 559
kevman 0:38ceb79fef03 560 #endif /* MBEDTLS_SHA256_C */