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2cf5a7c98e
mbedtls/library/sha256.c
Manuel Pégourié-Gonnard 2cf5a7c98e The Great Renaming 
A simple execution of tmp/invoke-rename.pl
2015-04-08 13:25:31 +02:00

510 lines
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C
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/*
* FIPS-180-2 compliant SHA-256 implementation
*
* Copyright (C) 2006-2014, ARM Limited, All Rights Reserved
*
* This file is part of mbed TLS (https://tls.mbed.org)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
* 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 <string.h>
#if defined(MBEDTLS_FS_IO)
#include <stdio.h>
#endif
#if defined(MBEDTLS_SELF_TEST)
#if defined(MBEDTLS_PLATFORM_C)
#include "mbedtls/platform.h"
#else
#include <stdio.h>
#define mbedtls_printf printf
#endif /* MBEDTLS_PLATFORM_C */
#endif /* MBEDTLS_SELF_TEST */
/* Implementation that should never be optimized out by the compiler */
static void mbedtls_zeroize( void *v, size_t n ) {
volatile unsigned char *p = v; while( n-- ) *p++ = 0;
}
#if !defined(MBEDTLS_SHA256_ALT)
/*
* 32-bit integer manipulation macros (big endian)
*/
#ifndef GET_UINT32_BE
#define GET_UINT32_BE(n,b,i) \
{ \
(n) = ( (uint32_t) (b)[(i) ] << 24 ) \
| ( (uint32_t) (b)[(i) + 1] << 16 ) \
| ( (uint32_t) (b)[(i) + 2] << 8 ) \
| ( (uint32_t) (b)[(i) + 3] ); \
}
#endif
#ifndef PUT_UINT32_BE
#define PUT_UINT32_BE(n,b,i) \
{ \
(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) ); \
}
#endif
void mbedtls_sha256_init( mbedtls_sha256_context *ctx )
{
memset( ctx, 0, sizeof( mbedtls_sha256_context ) );
}
void mbedtls_sha256_free( mbedtls_sha256_context *ctx )
{
if( ctx == NULL )
return;
mbedtls_zeroize( ctx, sizeof( mbedtls_sha256_context ) );
}
/*
* SHA-256 context setup
*/
void mbedtls_sha256_starts( mbedtls_sha256_context *ctx, int is224 )
{
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;
}
#if !defined(MBEDTLS_SHA256_PROCESS_ALT)
void mbedtls_sha256_process( mbedtls_sha256_context *ctx, const unsigned char data[64] )
{
uint32_t temp1, temp2, W[64];
uint32_t A, B, C, D, E, F, G, H;
GET_UINT32_BE( W[ 0], data, 0 );
GET_UINT32_BE( W[ 1], data, 4 );
GET_UINT32_BE( W[ 2], data, 8 );
GET_UINT32_BE( W[ 3], data, 12 );
GET_UINT32_BE( W[ 4], data, 16 );
GET_UINT32_BE( W[ 5], data, 20 );
GET_UINT32_BE( W[ 6], data, 24 );
GET_UINT32_BE( W[ 7], data, 28 );
GET_UINT32_BE( W[ 8], data, 32 );
GET_UINT32_BE( W[ 9], data, 36 );
GET_UINT32_BE( W[10], data, 40 );
GET_UINT32_BE( W[11], data, 44 );
GET_UINT32_BE( W[12], data, 48 );
GET_UINT32_BE( W[13], data, 52 );
GET_UINT32_BE( W[14], data, 56 );
GET_UINT32_BE( W[15], data, 60 );
#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) \
{ \
temp1 = h + S3(e) + F1(e,f,g) + K + x; \
temp2 = S2(a) + F0(a,b,c); \
d += temp1; h = temp1 + temp2; \
}
A = ctx->state[0];
B = ctx->state[1];
C = ctx->state[2];
D = ctx->state[3];
E = ctx->state[4];
F = ctx->state[5];
G = ctx->state[6];
H = ctx->state[7];
P( A, B, C, D, E, F, G, H, W[ 0], 0x428A2F98 );
P( H, A, B, C, D, E, F, G, W[ 1], 0x71374491 );
P( G, H, A, B, C, D, E, F, W[ 2], 0xB5C0FBCF );
P( F, G, H, A, B, C, D, E, W[ 3], 0xE9B5DBA5 );
P( E, F, G, H, A, B, C, D, W[ 4], 0x3956C25B );
P( D, E, F, G, H, A, B, C, W[ 5], 0x59F111F1 );
P( C, D, E, F, G, H, A, B, W[ 6], 0x923F82A4 );
P( B, C, D, E, F, G, H, A, W[ 7], 0xAB1C5ED5 );
P( A, B, C, D, E, F, G, H, W[ 8], 0xD807AA98 );
P( H, A, B, C, D, E, F, G, W[ 9], 0x12835B01 );
P( G, H, A, B, C, D, E, F, W[10], 0x243185BE );
P( F, G, H, A, B, C, D, E, W[11], 0x550C7DC3 );
P( E, F, G, H, A, B, C, D, W[12], 0x72BE5D74 );
P( D, E, F, G, H, A, B, C, W[13], 0x80DEB1FE );
P( C, D, E, F, G, H, A, B, W[14], 0x9BDC06A7 );
P( B, C, D, E, F, G, H, A, W[15], 0xC19BF174 );
P( A, B, C, D, E, F, G, H, R(16), 0xE49B69C1 );
P( H, A, B, C, D, E, F, G, R(17), 0xEFBE4786 );
P( G, H, A, B, C, D, E, F, R(18), 0x0FC19DC6 );
P( F, G, H, A, B, C, D, E, R(19), 0x240CA1CC );
P( E, F, G, H, A, B, C, D, R(20), 0x2DE92C6F );
P( D, E, F, G, H, A, B, C, R(21), 0x4A7484AA );
P( C, D, E, F, G, H, A, B, R(22), 0x5CB0A9DC );
P( B, C, D, E, F, G, H, A, R(23), 0x76F988DA );
P( A, B, C, D, E, F, G, H, R(24), 0x983E5152 );
P( H, A, B, C, D, E, F, G, R(25), 0xA831C66D );
P( G, H, A, B, C, D, E, F, R(26), 0xB00327C8 );
P( F, G, H, A, B, C, D, E, R(27), 0xBF597FC7 );
P( E, F, G, H, A, B, C, D, R(28), 0xC6E00BF3 );
P( D, E, F, G, H, A, B, C, R(29), 0xD5A79147 );
P( C, D, E, F, G, H, A, B, R(30), 0x06CA6351 );
P( B, C, D, E, F, G, H, A, R(31), 0x14292967 );
P( A, B, C, D, E, F, G, H, R(32), 0x27B70A85 );
P( H, A, B, C, D, E, F, G, R(33), 0x2E1B2138 );
P( G, H, A, B, C, D, E, F, R(34), 0x4D2C6DFC );
P( F, G, H, A, B, C, D, E, R(35), 0x53380D13 );
P( E, F, G, H, A, B, C, D, R(36), 0x650A7354 );
P( D, E, F, G, H, A, B, C, R(37), 0x766A0ABB );
P( C, D, E, F, G, H, A, B, R(38), 0x81C2C92E );
P( B, C, D, E, F, G, H, A, R(39), 0x92722C85 );
P( A, B, C, D, E, F, G, H, R(40), 0xA2BFE8A1 );
P( H, A, B, C, D, E, F, G, R(41), 0xA81A664B );
P( G, H, A, B, C, D, E, F, R(42), 0xC24B8B70 );
P( F, G, H, A, B, C, D, E, R(43), 0xC76C51A3 );
P( E, F, G, H, A, B, C, D, R(44), 0xD192E819 );
P( D, E, F, G, H, A, B, C, R(45), 0xD6990624 );
P( C, D, E, F, G, H, A, B, R(46), 0xF40E3585 );
P( B, C, D, E, F, G, H, A, R(47), 0x106AA070 );
P( A, B, C, D, E, F, G, H, R(48), 0x19A4C116 );
P( H, A, B, C, D, E, F, G, R(49), 0x1E376C08 );
P( G, H, A, B, C, D, E, F, R(50), 0x2748774C );
P( F, G, H, A, B, C, D, E, R(51), 0x34B0BCB5 );
P( E, F, G, H, A, B, C, D, R(52), 0x391C0CB3 );
P( D, E, F, G, H, A, B, C, R(53), 0x4ED8AA4A );
P( C, D, E, F, G, H, A, B, R(54), 0x5B9CCA4F );
P( B, C, D, E, F, G, H, A, R(55), 0x682E6FF3 );
P( A, B, C, D, E, F, G, H, R(56), 0x748F82EE );
P( H, A, B, C, D, E, F, G, R(57), 0x78A5636F );
P( G, H, A, B, C, D, E, F, R(58), 0x84C87814 );
P( F, G, H, A, B, C, D, E, R(59), 0x8CC70208 );
P( E, F, G, H, A, B, C, D, R(60), 0x90BEFFFA );
P( D, E, F, G, H, A, B, C, R(61), 0xA4506CEB );
P( C, D, E, F, G, H, A, B, R(62), 0xBEF9A3F7 );
P( B, C, D, E, F, G, H, A, R(63), 0xC67178F2 );
ctx->state[0] += A;
ctx->state[1] += B;
ctx->state[2] += C;
ctx->state[3] += D;
ctx->state[4] += E;
ctx->state[5] += F;
ctx->state[6] += G;
ctx->state[7] += H;
}
#endif /* !MBEDTLS_SHA256_PROCESS_ALT */
/*
* SHA-256 process buffer
*/
void mbedtls_sha256_update( mbedtls_sha256_context *ctx, const unsigned char *input,
size_t ilen )
{
size_t fill;
uint32_t left;
if( ilen == 0 )
return;
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 );
mbedtls_sha256_process( ctx, ctx->buffer );
input += fill;
ilen -= fill;
left = 0;
}
while( ilen >= 64 )
{
mbedtls_sha256_process( ctx, input );
input += 64;
ilen -= 64;
}
if( ilen > 0 )
memcpy( (void *) (ctx->buffer + left), input, ilen );
}
static const unsigned char sha256_padding[64] =
{
0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
/*
* SHA-256 final digest
*/
void mbedtls_sha256_finish( mbedtls_sha256_context *ctx, unsigned char output[32] )
{
uint32_t last, padn;
uint32_t high, low;
unsigned char msglen[8];
high = ( ctx->total[0] >> 29 )
| ( ctx->total[1] << 3 );
low = ( ctx->total[0] << 3 );
PUT_UINT32_BE( high, msglen, 0 );
PUT_UINT32_BE( low, msglen, 4 );
last = ctx->total[0] & 0x3F;
padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );
mbedtls_sha256_update( ctx, sha256_padding, padn );
mbedtls_sha256_update( ctx, msglen, 8 );
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 );
}
#endif /* !MBEDTLS_SHA256_ALT */
/*
* output = SHA-256( input buffer )
*/
void mbedtls_sha256( const unsigned char *input, size_t ilen,
unsigned char output[32], int is224 )
{
mbedtls_sha256_context ctx;
mbedtls_sha256_init( &ctx );
mbedtls_sha256_starts( &ctx, is224 );
mbedtls_sha256_update( &ctx, input, ilen );
mbedtls_sha256_finish( &ctx, output );
mbedtls_sha256_free( &ctx );
}
#if defined(MBEDTLS_FS_IO)
/*
* output = SHA-256( file contents )
*/
int mbedtls_sha256_file( const char *path, unsigned char output[32], int is224 )
{
FILE *f;
size_t n;
mbedtls_sha256_context ctx;
unsigned char buf[1024];
if( ( f = fopen( path, "rb" ) ) == NULL )
return( MBEDTLS_ERR_SHA256_FILE_IO_ERROR );
mbedtls_sha256_init( &ctx );
mbedtls_sha256_starts( &ctx, is224 );
while( ( n = fread( buf, 1, sizeof( buf ), f ) ) > 0 )
mbedtls_sha256_update( &ctx, buf, n );
mbedtls_sha256_finish( &ctx, output );
mbedtls_sha256_free( &ctx );
if( ferror( f ) != 0 )
{
fclose( f );
return( MBEDTLS_ERR_SHA256_FILE_IO_ERROR );
}
fclose( f );
return( 0 );
}
#endif /* MBEDTLS_FS_IO */
#if defined(MBEDTLS_SELF_TEST)
/*
* FIPS-180-2 test vectors
*/
static const unsigned char sha256_test_buf[3][57] =
{
{ "abc" },
{ "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" },
{ "" }
};
static const int 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[1024];
unsigned char sha256sum[32];
mbedtls_sha256_context ctx;
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 );
mbedtls_sha256_starts( &ctx, k );
if( j == 2 )
{
memset( buf, 'a', buflen = 1000 );
for( j = 0; j < 1000; j++ )
mbedtls_sha256_update( &ctx, buf, buflen );
}
else
mbedtls_sha256_update( &ctx, sha256_test_buf[j],
sha256_test_buflen[j] );
mbedtls_sha256_finish( &ctx, sha256sum );
if( memcmp( sha256sum, sha256_test_sum[i], 32 - k * 4 ) != 0 )
{
if( verbose != 0 )
mbedtls_printf( "failed\n" );
ret = 1;
goto exit;
}
if( verbose != 0 )
mbedtls_printf( "passed\n" );
}
if( verbose != 0 )
mbedtls_printf( "\n" );
exit:
mbedtls_sha256_free( &ctx );
return( ret );
}
#endif /* MBEDTLS_SELF_TEST */
#endif /* MBEDTLS_SHA256_C */
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