/* | |
* FIPS-180-2 compliant SHA-256 implementation | |
* | |
* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved | |
* SPDX-License-Identifier: Apache-2.0 | |
* | |
* Licensed under the Apache License, Version 2.0 (the "License"); you may | |
* not use this file except in compliance with the License. | |
* You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, software | |
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT | |
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
* See the License for the specific language governing permissions and | |
* limitations under the License. | |
* | |
* This file is part of mbed TLS (https://tls.mbed.org) | |
*/ | |
/* | |
* The SHA-256 Secure Hash Standard was published by NIST in 2002. | |
* | |
* http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf | |
*/ | |
#if !defined(MBEDTLS_CONFIG_FILE) | |
#include "mbedtls/config.h" | |
#else | |
#include MBEDTLS_CONFIG_FILE | |
#endif | |
#if defined(MBEDTLS_SHA256_C) | |
#include "mbedtls/sha256.h" | |
#include "mbedtls/platform_util.h" | |
#include <string.h> | |
#if defined(MBEDTLS_SELF_TEST) | |
#if defined(MBEDTLS_PLATFORM_C) | |
#include "mbedtls/platform.h" | |
#else | |
#include <stdio.h> | |
#include <stdlib.h> | |
#define mbedtls_printf printf | |
#define mbedtls_calloc calloc | |
#define mbedtls_free free | |
#endif /* MBEDTLS_PLATFORM_C */ | |
#endif /* MBEDTLS_SELF_TEST */ | |
#define SHA256_VALIDATE_RET(cond) \ | |
MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_SHA256_BAD_INPUT_DATA ) | |
#define SHA256_VALIDATE(cond) MBEDTLS_INTERNAL_VALIDATE( cond ) | |
#if !defined(MBEDTLS_SHA256_ALT) | |
/* | |
* 32-bit integer manipulation macros (big endian) | |
*/ | |
#ifndef GET_UINT32_BE | |
#define GET_UINT32_BE(n,b,i) \ | |
do { \ | |
(n) = ( (uint32_t) (b)[(i) ] << 24 ) \ | |
| ( (uint32_t) (b)[(i) + 1] << 16 ) \ | |
| ( (uint32_t) (b)[(i) + 2] << 8 ) \ | |
| ( (uint32_t) (b)[(i) + 3] ); \ | |
} while( 0 ) | |
#endif | |
#ifndef PUT_UINT32_BE | |
#define PUT_UINT32_BE(n,b,i) \ | |
do { \ | |
(b)[(i) ] = (unsigned char) ( (n) >> 24 ); \ | |
(b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \ | |
(b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \ | |
(b)[(i) + 3] = (unsigned char) ( (n) ); \ | |
} while( 0 ) | |
#endif | |
void mbedtls_sha256_init( mbedtls_sha256_context *ctx ) | |
{ | |
SHA256_VALIDATE( ctx != NULL ); | |
memset( ctx, 0, sizeof( mbedtls_sha256_context ) ); | |
} | |
void mbedtls_sha256_free( mbedtls_sha256_context *ctx ) | |
{ | |
if( ctx == NULL ) | |
return; | |
mbedtls_platform_zeroize( ctx, sizeof( mbedtls_sha256_context ) ); | |
} | |
void mbedtls_sha256_clone( mbedtls_sha256_context *dst, | |
const mbedtls_sha256_context *src ) | |
{ | |
SHA256_VALIDATE( dst != NULL ); | |
SHA256_VALIDATE( src != NULL ); | |
*dst = *src; | |
} | |
/* | |
* SHA-256 context setup | |
*/ | |
int mbedtls_sha256_starts_ret( mbedtls_sha256_context *ctx, int is224 ) | |
{ | |
SHA256_VALIDATE_RET( ctx != NULL ); | |
SHA256_VALIDATE_RET( is224 == 0 || is224 == 1 ); | |
ctx->total[0] = 0; | |
ctx->total[1] = 0; | |
if( is224 == 0 ) | |
{ | |
/* SHA-256 */ | |
ctx->state[0] = 0x6A09E667; | |
ctx->state[1] = 0xBB67AE85; | |
ctx->state[2] = 0x3C6EF372; | |
ctx->state[3] = 0xA54FF53A; | |
ctx->state[4] = 0x510E527F; | |
ctx->state[5] = 0x9B05688C; | |
ctx->state[6] = 0x1F83D9AB; | |
ctx->state[7] = 0x5BE0CD19; | |
} | |
else | |
{ | |
/* SHA-224 */ | |
ctx->state[0] = 0xC1059ED8; | |
ctx->state[1] = 0x367CD507; | |
ctx->state[2] = 0x3070DD17; | |
ctx->state[3] = 0xF70E5939; | |
ctx->state[4] = 0xFFC00B31; | |
ctx->state[5] = 0x68581511; | |
ctx->state[6] = 0x64F98FA7; | |
ctx->state[7] = 0xBEFA4FA4; | |
} | |
ctx->is224 = is224; | |
return( 0 ); | |
} | |
#if !defined(MBEDTLS_DEPRECATED_REMOVED) | |
void mbedtls_sha256_starts( mbedtls_sha256_context *ctx, | |
int is224 ) | |
{ | |
mbedtls_sha256_starts_ret( ctx, is224 ); | |
} | |
#endif | |
#if !defined(MBEDTLS_SHA256_PROCESS_ALT) | |
static const uint32_t K[] = | |
{ | |
0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5, | |
0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5, | |
0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3, | |
0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174, | |
0xE49B69C1, 0xEFBE4786, 0x0FC19DC6, 0x240CA1CC, | |
0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA, | |
0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7, | |
0xC6E00BF3, 0xD5A79147, 0x06CA6351, 0x14292967, | |
0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13, | |
0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85, | |
0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3, | |
0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070, | |
0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5, | |
0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3, | |
0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208, | |
0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2, | |
}; | |
#define SHR(x,n) (((x) & 0xFFFFFFFF) >> (n)) | |
#define ROTR(x,n) (SHR(x,n) | ((x) << (32 - (n)))) | |
#define S0(x) (ROTR(x, 7) ^ ROTR(x,18) ^ SHR(x, 3)) | |
#define S1(x) (ROTR(x,17) ^ ROTR(x,19) ^ SHR(x,10)) | |
#define S2(x) (ROTR(x, 2) ^ ROTR(x,13) ^ ROTR(x,22)) | |
#define S3(x) (ROTR(x, 6) ^ ROTR(x,11) ^ ROTR(x,25)) | |
#define F0(x,y,z) (((x) & (y)) | ((z) & ((x) | (y)))) | |
#define F1(x,y,z) ((z) ^ ((x) & ((y) ^ (z)))) | |
#define R(t) \ | |
( \ | |
W[t] = S1(W[(t) - 2]) + W[(t) - 7] + \ | |
S0(W[(t) - 15]) + W[(t) - 16] \ | |
) | |
#define P(a,b,c,d,e,f,g,h,x,K) \ | |
do \ | |
{ \ | |
temp1 = (h) + S3(e) + F1((e),(f),(g)) + (K) + (x); \ | |
temp2 = S2(a) + F0((a),(b),(c)); \ | |
(d) += temp1; (h) = temp1 + temp2; \ | |
} while( 0 ) | |
int mbedtls_internal_sha256_process( mbedtls_sha256_context *ctx, | |
const unsigned char data[64] ) | |
{ | |
uint32_t temp1, temp2, W[64]; | |
uint32_t A[8]; | |
unsigned int i; | |
SHA256_VALIDATE_RET( ctx != NULL ); | |
SHA256_VALIDATE_RET( (const unsigned char *)data != NULL ); | |
for( i = 0; i < 8; i++ ) | |
A[i] = ctx->state[i]; | |
#if defined(MBEDTLS_SHA256_SMALLER) | |
for( i = 0; i < 64; i++ ) | |
{ | |
if( i < 16 ) | |
GET_UINT32_BE( W[i], data, 4 * i ); | |
else | |
R( i ); | |
P( A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], W[i], K[i] ); | |
temp1 = A[7]; A[7] = A[6]; A[6] = A[5]; A[5] = A[4]; A[4] = A[3]; | |
A[3] = A[2]; A[2] = A[1]; A[1] = A[0]; A[0] = temp1; | |
} | |
#else /* MBEDTLS_SHA256_SMALLER */ | |
for( i = 0; i < 16; i++ ) | |
GET_UINT32_BE( W[i], data, 4 * i ); | |
for( i = 0; i < 16; i += 8 ) | |
{ | |
P( A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], W[i+0], K[i+0] ); | |
P( A[7], A[0], A[1], A[2], A[3], A[4], A[5], A[6], W[i+1], K[i+1] ); | |
P( A[6], A[7], A[0], A[1], A[2], A[3], A[4], A[5], W[i+2], K[i+2] ); | |
P( A[5], A[6], A[7], A[0], A[1], A[2], A[3], A[4], W[i+3], K[i+3] ); | |
P( A[4], A[5], A[6], A[7], A[0], A[1], A[2], A[3], W[i+4], K[i+4] ); | |
P( A[3], A[4], A[5], A[6], A[7], A[0], A[1], A[2], W[i+5], K[i+5] ); | |
P( A[2], A[3], A[4], A[5], A[6], A[7], A[0], A[1], W[i+6], K[i+6] ); | |
P( A[1], A[2], A[3], A[4], A[5], A[6], A[7], A[0], W[i+7], K[i+7] ); | |
} | |
for( i = 16; i < 64; i += 8 ) | |
{ | |
P( A[0], A[1], A[2], A[3], A[4], A[5], A[6], A[7], R(i+0), K[i+0] ); | |
P( A[7], A[0], A[1], A[2], A[3], A[4], A[5], A[6], R(i+1), K[i+1] ); | |
P( A[6], A[7], A[0], A[1], A[2], A[3], A[4], A[5], R(i+2), K[i+2] ); | |
P( A[5], A[6], A[7], A[0], A[1], A[2], A[3], A[4], R(i+3), K[i+3] ); | |
P( A[4], A[5], A[6], A[7], A[0], A[1], A[2], A[3], R(i+4), K[i+4] ); | |
P( A[3], A[4], A[5], A[6], A[7], A[0], A[1], A[2], R(i+5), K[i+5] ); | |
P( A[2], A[3], A[4], A[5], A[6], A[7], A[0], A[1], R(i+6), K[i+6] ); | |
P( A[1], A[2], A[3], A[4], A[5], A[6], A[7], A[0], R(i+7), K[i+7] ); | |
} | |
#endif /* MBEDTLS_SHA256_SMALLER */ | |
for( i = 0; i < 8; i++ ) | |
ctx->state[i] += A[i]; | |
return( 0 ); | |
} | |
#if !defined(MBEDTLS_DEPRECATED_REMOVED) | |
void mbedtls_sha256_process( mbedtls_sha256_context *ctx, | |
const unsigned char data[64] ) | |
{ | |
mbedtls_internal_sha256_process( ctx, data ); | |
} | |
#endif | |
#endif /* !MBEDTLS_SHA256_PROCESS_ALT */ | |
/* | |
* SHA-256 process buffer | |
*/ | |
int mbedtls_sha256_update_ret( mbedtls_sha256_context *ctx, | |
const unsigned char *input, | |
size_t ilen ) | |
{ | |
int ret; | |
size_t fill; | |
uint32_t left; | |
SHA256_VALIDATE_RET( ctx != NULL ); | |
SHA256_VALIDATE_RET( ilen == 0 || input != NULL ); | |
if( ilen == 0 ) | |
return( 0 ); | |
left = ctx->total[0] & 0x3F; | |
fill = 64 - left; | |
ctx->total[0] += (uint32_t) ilen; | |
ctx->total[0] &= 0xFFFFFFFF; | |
if( ctx->total[0] < (uint32_t) ilen ) | |
ctx->total[1]++; | |
if( left && ilen >= fill ) | |
{ | |
memcpy( (void *) (ctx->buffer + left), input, fill ); | |
if( ( ret = mbedtls_internal_sha256_process( ctx, ctx->buffer ) ) != 0 ) | |
return( ret ); | |
input += fill; | |
ilen -= fill; | |
left = 0; | |
} | |
while( ilen >= 64 ) | |
{ | |
if( ( ret = mbedtls_internal_sha256_process( ctx, input ) ) != 0 ) | |
return( ret ); | |
input += 64; | |
ilen -= 64; | |
} | |
if( ilen > 0 ) | |
memcpy( (void *) (ctx->buffer + left), input, ilen ); | |
return( 0 ); | |
} | |
#if !defined(MBEDTLS_DEPRECATED_REMOVED) | |
void mbedtls_sha256_update( mbedtls_sha256_context *ctx, | |
const unsigned char *input, | |
size_t ilen ) | |
{ | |
mbedtls_sha256_update_ret( ctx, input, ilen ); | |
} | |
#endif | |
/* | |
* SHA-256 final digest | |
*/ | |
int mbedtls_sha256_finish_ret( mbedtls_sha256_context *ctx, | |
unsigned char output[32] ) | |
{ | |
int ret; | |
uint32_t used; | |
uint32_t high, low; | |
SHA256_VALIDATE_RET( ctx != NULL ); | |
SHA256_VALIDATE_RET( (unsigned char *)output != NULL ); | |
/* | |
* Add padding: 0x80 then 0x00 until 8 bytes remain for the length | |
*/ | |
used = ctx->total[0] & 0x3F; | |
ctx->buffer[used++] = 0x80; | |
if( used <= 56 ) | |
{ | |
/* Enough room for padding + length in current block */ | |
memset( ctx->buffer + used, 0, 56 - used ); | |
} | |
else | |
{ | |
/* We'll need an extra block */ | |
memset( ctx->buffer + used, 0, 64 - used ); | |
if( ( ret = mbedtls_internal_sha256_process( ctx, ctx->buffer ) ) != 0 ) | |
return( ret ); | |
memset( ctx->buffer, 0, 56 ); | |
} | |
/* | |
* Add message length | |
*/ | |
high = ( ctx->total[0] >> 29 ) | |
| ( ctx->total[1] << 3 ); | |
low = ( ctx->total[0] << 3 ); | |
PUT_UINT32_BE( high, ctx->buffer, 56 ); | |
PUT_UINT32_BE( low, ctx->buffer, 60 ); | |
if( ( ret = mbedtls_internal_sha256_process( ctx, ctx->buffer ) ) != 0 ) | |
return( ret ); | |
/* | |
* Output final state | |
*/ | |
PUT_UINT32_BE( ctx->state[0], output, 0 ); | |
PUT_UINT32_BE( ctx->state[1], output, 4 ); | |
PUT_UINT32_BE( ctx->state[2], output, 8 ); | |
PUT_UINT32_BE( ctx->state[3], output, 12 ); | |
PUT_UINT32_BE( ctx->state[4], output, 16 ); | |
PUT_UINT32_BE( ctx->state[5], output, 20 ); | |
PUT_UINT32_BE( ctx->state[6], output, 24 ); | |
if( ctx->is224 == 0 ) | |
PUT_UINT32_BE( ctx->state[7], output, 28 ); | |
return( 0 ); | |
} | |
#if !defined(MBEDTLS_DEPRECATED_REMOVED) | |
void mbedtls_sha256_finish( mbedtls_sha256_context *ctx, | |
unsigned char output[32] ) | |
{ | |
mbedtls_sha256_finish_ret( ctx, output ); | |
} | |
#endif | |
#endif /* !MBEDTLS_SHA256_ALT */ | |
/* | |
* output = SHA-256( input buffer ) | |
*/ | |
int mbedtls_sha256_ret( const unsigned char *input, | |
size_t ilen, | |
unsigned char output[32], | |
int is224 ) | |
{ | |
int ret; | |
mbedtls_sha256_context ctx; | |
SHA256_VALIDATE_RET( is224 == 0 || is224 == 1 ); | |
SHA256_VALIDATE_RET( ilen == 0 || input != NULL ); | |
SHA256_VALIDATE_RET( (unsigned char *)output != NULL ); | |
mbedtls_sha256_init( &ctx ); | |
if( ( ret = mbedtls_sha256_starts_ret( &ctx, is224 ) ) != 0 ) | |
goto exit; | |
if( ( ret = mbedtls_sha256_update_ret( &ctx, input, ilen ) ) != 0 ) | |
goto exit; | |
if( ( ret = mbedtls_sha256_finish_ret( &ctx, output ) ) != 0 ) | |
goto exit; | |
exit: | |
mbedtls_sha256_free( &ctx ); | |
return( ret ); | |
} | |
#if !defined(MBEDTLS_DEPRECATED_REMOVED) | |
void mbedtls_sha256( const unsigned char *input, | |
size_t ilen, | |
unsigned char output[32], | |
int is224 ) | |
{ | |
mbedtls_sha256_ret( input, ilen, output, is224 ); | |
} | |
#endif | |
#if defined(MBEDTLS_SELF_TEST) | |
/* | |
* FIPS-180-2 test vectors | |
*/ | |
static const unsigned char sha256_test_buf[3][57] = | |
{ | |
{ "abc" }, | |
{ "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" }, | |
{ "" } | |
}; | |
static const size_t sha256_test_buflen[3] = | |
{ | |
3, 56, 1000 | |
}; | |
static const unsigned char sha256_test_sum[6][32] = | |
{ | |
/* | |
* SHA-224 test vectors | |
*/ | |
{ 0x23, 0x09, 0x7D, 0x22, 0x34, 0x05, 0xD8, 0x22, | |
0x86, 0x42, 0xA4, 0x77, 0xBD, 0xA2, 0x55, 0xB3, | |
0x2A, 0xAD, 0xBC, 0xE4, 0xBD, 0xA0, 0xB3, 0xF7, | |
0xE3, 0x6C, 0x9D, 0xA7 }, | |
{ 0x75, 0x38, 0x8B, 0x16, 0x51, 0x27, 0x76, 0xCC, | |
0x5D, 0xBA, 0x5D, 0xA1, 0xFD, 0x89, 0x01, 0x50, | |
0xB0, 0xC6, 0x45, 0x5C, 0xB4, 0xF5, 0x8B, 0x19, | |
0x52, 0x52, 0x25, 0x25 }, | |
{ 0x20, 0x79, 0x46, 0x55, 0x98, 0x0C, 0x91, 0xD8, | |
0xBB, 0xB4, 0xC1, 0xEA, 0x97, 0x61, 0x8A, 0x4B, | |
0xF0, 0x3F, 0x42, 0x58, 0x19, 0x48, 0xB2, 0xEE, | |
0x4E, 0xE7, 0xAD, 0x67 }, | |
/* | |
* SHA-256 test vectors | |
*/ | |
{ 0xBA, 0x78, 0x16, 0xBF, 0x8F, 0x01, 0xCF, 0xEA, | |
0x41, 0x41, 0x40, 0xDE, 0x5D, 0xAE, 0x22, 0x23, | |
0xB0, 0x03, 0x61, 0xA3, 0x96, 0x17, 0x7A, 0x9C, | |
0xB4, 0x10, 0xFF, 0x61, 0xF2, 0x00, 0x15, 0xAD }, | |
{ 0x24, 0x8D, 0x6A, 0x61, 0xD2, 0x06, 0x38, 0xB8, | |
0xE5, 0xC0, 0x26, 0x93, 0x0C, 0x3E, 0x60, 0x39, | |
0xA3, 0x3C, 0xE4, 0x59, 0x64, 0xFF, 0x21, 0x67, | |
0xF6, 0xEC, 0xED, 0xD4, 0x19, 0xDB, 0x06, 0xC1 }, | |
{ 0xCD, 0xC7, 0x6E, 0x5C, 0x99, 0x14, 0xFB, 0x92, | |
0x81, 0xA1, 0xC7, 0xE2, 0x84, 0xD7, 0x3E, 0x67, | |
0xF1, 0x80, 0x9A, 0x48, 0xA4, 0x97, 0x20, 0x0E, | |
0x04, 0x6D, 0x39, 0xCC, 0xC7, 0x11, 0x2C, 0xD0 } | |
}; | |
/* | |
* Checkup routine | |
*/ | |
int mbedtls_sha256_self_test( int verbose ) | |
{ | |
int i, j, k, buflen, ret = 0; | |
unsigned char *buf; | |
unsigned char sha256sum[32]; | |
mbedtls_sha256_context ctx; | |
buf = mbedtls_calloc( 1024, sizeof(unsigned char) ); | |
if( NULL == buf ) | |
{ | |
if( verbose != 0 ) | |
mbedtls_printf( "Buffer allocation failed\n" ); | |
return( 1 ); | |
} | |
mbedtls_sha256_init( &ctx ); | |
for( i = 0; i < 6; i++ ) | |
{ | |
j = i % 3; | |
k = i < 3; | |
if( verbose != 0 ) | |
mbedtls_printf( " SHA-%d test #%d: ", 256 - k * 32, j + 1 ); | |
if( ( ret = mbedtls_sha256_starts_ret( &ctx, k ) ) != 0 ) | |
goto fail; | |
if( j == 2 ) | |
{ | |
memset( buf, 'a', buflen = 1000 ); | |
for( j = 0; j < 1000; j++ ) | |
{ | |
ret = mbedtls_sha256_update_ret( &ctx, buf, buflen ); | |
if( ret != 0 ) | |
goto fail; | |
} | |
} | |
else | |
{ | |
ret = mbedtls_sha256_update_ret( &ctx, sha256_test_buf[j], | |
sha256_test_buflen[j] ); | |
if( ret != 0 ) | |
goto fail; | |
} | |
if( ( ret = mbedtls_sha256_finish_ret( &ctx, sha256sum ) ) != 0 ) | |
goto fail; | |
if( memcmp( sha256sum, sha256_test_sum[i], 32 - k * 4 ) != 0 ) | |
{ | |
ret = 1; | |
goto fail; | |
} | |
if( verbose != 0 ) | |
mbedtls_printf( "passed\n" ); | |
} | |
if( verbose != 0 ) | |
mbedtls_printf( "\n" ); | |
goto exit; | |
fail: | |
if( verbose != 0 ) | |
mbedtls_printf( "failed\n" ); | |
exit: | |
mbedtls_sha256_free( &ctx ); | |
mbedtls_free( buf ); | |
return( ret ); | |
} | |
#endif /* MBEDTLS_SELF_TEST */ | |
#endif /* MBEDTLS_SHA256_C */ |