mirror of
https://github.com/yuzu-emu/mbedtls.git
synced 2024-11-26 11:55:41 +01:00
3d98b97442
Modify all the following functions to zeroize an internal buffer before exiting the function. The buffer could potentially contain confidential data read from a file. * md2_file() * md4_file() * md5_file() * ripemd160_file() * sha1_file() * sha256_file() * sha512_file()
401 lines
9.9 KiB
C
401 lines
9.9 KiB
C
/*
|
|
* RFC 1115/1319 compliant MD2 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 MD2 algorithm was designed by Ron Rivest in 1989.
|
|
*
|
|
* http://www.ietf.org/rfc/rfc1115.txt
|
|
* http://www.ietf.org/rfc/rfc1319.txt
|
|
*/
|
|
|
|
#if !defined(POLARSSL_CONFIG_FILE)
|
|
#include "polarssl/config.h"
|
|
#else
|
|
#include POLARSSL_CONFIG_FILE
|
|
#endif
|
|
|
|
#if defined(POLARSSL_MD2_C)
|
|
|
|
#include "polarssl/md2.h"
|
|
|
|
#include <string.h>
|
|
|
|
#if defined(POLARSSL_FS_IO)
|
|
#include <stdio.h>
|
|
#endif
|
|
|
|
#if defined(POLARSSL_SELF_TEST)
|
|
#if defined(POLARSSL_PLATFORM_C)
|
|
#include "polarssl/platform.h"
|
|
#else
|
|
#include <stdio.h>
|
|
#define polarssl_printf printf
|
|
#endif /* POLARSSL_PLATFORM_C */
|
|
#endif /* POLARSSL_SELF_TEST */
|
|
|
|
#if !defined(POLARSSL_MD2_ALT)
|
|
|
|
/* Implementation that should never be optimized out by the compiler */
|
|
static void polarssl_zeroize( void *v, size_t n ) {
|
|
volatile unsigned char *p = v; while( n-- ) *p++ = 0;
|
|
}
|
|
|
|
static const unsigned char PI_SUBST[256] =
|
|
{
|
|
0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01, 0x3D, 0x36,
|
|
0x54, 0xA1, 0xEC, 0xF0, 0x06, 0x13, 0x62, 0xA7, 0x05, 0xF3,
|
|
0xC0, 0xC7, 0x73, 0x8C, 0x98, 0x93, 0x2B, 0xD9, 0xBC, 0x4C,
|
|
0x82, 0xCA, 0x1E, 0x9B, 0x57, 0x3C, 0xFD, 0xD4, 0xE0, 0x16,
|
|
0x67, 0x42, 0x6F, 0x18, 0x8A, 0x17, 0xE5, 0x12, 0xBE, 0x4E,
|
|
0xC4, 0xD6, 0xDA, 0x9E, 0xDE, 0x49, 0xA0, 0xFB, 0xF5, 0x8E,
|
|
0xBB, 0x2F, 0xEE, 0x7A, 0xA9, 0x68, 0x79, 0x91, 0x15, 0xB2,
|
|
0x07, 0x3F, 0x94, 0xC2, 0x10, 0x89, 0x0B, 0x22, 0x5F, 0x21,
|
|
0x80, 0x7F, 0x5D, 0x9A, 0x5A, 0x90, 0x32, 0x27, 0x35, 0x3E,
|
|
0xCC, 0xE7, 0xBF, 0xF7, 0x97, 0x03, 0xFF, 0x19, 0x30, 0xB3,
|
|
0x48, 0xA5, 0xB5, 0xD1, 0xD7, 0x5E, 0x92, 0x2A, 0xAC, 0x56,
|
|
0xAA, 0xC6, 0x4F, 0xB8, 0x38, 0xD2, 0x96, 0xA4, 0x7D, 0xB6,
|
|
0x76, 0xFC, 0x6B, 0xE2, 0x9C, 0x74, 0x04, 0xF1, 0x45, 0x9D,
|
|
0x70, 0x59, 0x64, 0x71, 0x87, 0x20, 0x86, 0x5B, 0xCF, 0x65,
|
|
0xE6, 0x2D, 0xA8, 0x02, 0x1B, 0x60, 0x25, 0xAD, 0xAE, 0xB0,
|
|
0xB9, 0xF6, 0x1C, 0x46, 0x61, 0x69, 0x34, 0x40, 0x7E, 0x0F,
|
|
0x55, 0x47, 0xA3, 0x23, 0xDD, 0x51, 0xAF, 0x3A, 0xC3, 0x5C,
|
|
0xF9, 0xCE, 0xBA, 0xC5, 0xEA, 0x26, 0x2C, 0x53, 0x0D, 0x6E,
|
|
0x85, 0x28, 0x84, 0x09, 0xD3, 0xDF, 0xCD, 0xF4, 0x41, 0x81,
|
|
0x4D, 0x52, 0x6A, 0xDC, 0x37, 0xC8, 0x6C, 0xC1, 0xAB, 0xFA,
|
|
0x24, 0xE1, 0x7B, 0x08, 0x0C, 0xBD, 0xB1, 0x4A, 0x78, 0x88,
|
|
0x95, 0x8B, 0xE3, 0x63, 0xE8, 0x6D, 0xE9, 0xCB, 0xD5, 0xFE,
|
|
0x3B, 0x00, 0x1D, 0x39, 0xF2, 0xEF, 0xB7, 0x0E, 0x66, 0x58,
|
|
0xD0, 0xE4, 0xA6, 0x77, 0x72, 0xF8, 0xEB, 0x75, 0x4B, 0x0A,
|
|
0x31, 0x44, 0x50, 0xB4, 0x8F, 0xED, 0x1F, 0x1A, 0xDB, 0x99,
|
|
0x8D, 0x33, 0x9F, 0x11, 0x83, 0x14
|
|
};
|
|
|
|
void md2_init( md2_context *ctx )
|
|
{
|
|
memset( ctx, 0, sizeof( md2_context ) );
|
|
}
|
|
|
|
void md2_free( md2_context *ctx )
|
|
{
|
|
if( ctx == NULL )
|
|
return;
|
|
|
|
polarssl_zeroize( ctx, sizeof( md2_context ) );
|
|
}
|
|
|
|
/*
|
|
* MD2 context setup
|
|
*/
|
|
void md2_starts( md2_context *ctx )
|
|
{
|
|
memset( ctx->cksum, 0, 16 );
|
|
memset( ctx->state, 0, 46 );
|
|
memset( ctx->buffer, 0, 16 );
|
|
ctx->left = 0;
|
|
}
|
|
|
|
void md2_process( md2_context *ctx )
|
|
{
|
|
int i, j;
|
|
unsigned char t = 0;
|
|
|
|
for( i = 0; i < 16; i++ )
|
|
{
|
|
ctx->state[i + 16] = ctx->buffer[i];
|
|
ctx->state[i + 32] =
|
|
(unsigned char)( ctx->buffer[i] ^ ctx->state[i]);
|
|
}
|
|
|
|
for( i = 0; i < 18; i++ )
|
|
{
|
|
for( j = 0; j < 48; j++ )
|
|
{
|
|
ctx->state[j] = (unsigned char)
|
|
( ctx->state[j] ^ PI_SUBST[t] );
|
|
t = ctx->state[j];
|
|
}
|
|
|
|
t = (unsigned char)( t + i );
|
|
}
|
|
|
|
t = ctx->cksum[15];
|
|
|
|
for( i = 0; i < 16; i++ )
|
|
{
|
|
ctx->cksum[i] = (unsigned char)
|
|
( ctx->cksum[i] ^ PI_SUBST[ctx->buffer[i] ^ t] );
|
|
t = ctx->cksum[i];
|
|
}
|
|
}
|
|
|
|
/*
|
|
* MD2 process buffer
|
|
*/
|
|
void md2_update( md2_context *ctx, const unsigned char *input, size_t ilen )
|
|
{
|
|
size_t fill;
|
|
|
|
while( ilen > 0 )
|
|
{
|
|
if( ilen > 16 - ctx->left )
|
|
fill = 16 - ctx->left;
|
|
else
|
|
fill = ilen;
|
|
|
|
memcpy( ctx->buffer + ctx->left, input, fill );
|
|
|
|
ctx->left += fill;
|
|
input += fill;
|
|
ilen -= fill;
|
|
|
|
if( ctx->left == 16 )
|
|
{
|
|
ctx->left = 0;
|
|
md2_process( ctx );
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* MD2 final digest
|
|
*/
|
|
void md2_finish( md2_context *ctx, unsigned char output[16] )
|
|
{
|
|
size_t i;
|
|
unsigned char x;
|
|
|
|
x = (unsigned char)( 16 - ctx->left );
|
|
|
|
for( i = ctx->left; i < 16; i++ )
|
|
ctx->buffer[i] = x;
|
|
|
|
md2_process( ctx );
|
|
|
|
memcpy( ctx->buffer, ctx->cksum, 16 );
|
|
md2_process( ctx );
|
|
|
|
memcpy( output, ctx->state, 16 );
|
|
}
|
|
|
|
#endif /* !POLARSSL_MD2_ALT */
|
|
|
|
/*
|
|
* output = MD2( input buffer )
|
|
*/
|
|
void md2( const unsigned char *input, size_t ilen, unsigned char output[16] )
|
|
{
|
|
md2_context ctx;
|
|
|
|
md2_init( &ctx );
|
|
md2_starts( &ctx );
|
|
md2_update( &ctx, input, ilen );
|
|
md2_finish( &ctx, output );
|
|
md2_free( &ctx );
|
|
}
|
|
|
|
#if defined(POLARSSL_FS_IO)
|
|
/*
|
|
* output = MD2( file contents )
|
|
*/
|
|
int md2_file( const char *path, unsigned char output[16] )
|
|
{
|
|
int ret = 0;
|
|
FILE *f;
|
|
size_t n;
|
|
md2_context ctx;
|
|
unsigned char buf[1024];
|
|
|
|
if( ( f = fopen( path, "rb" ) ) == NULL )
|
|
return( POLARSSL_ERR_MD2_FILE_IO_ERROR );
|
|
|
|
md2_init( &ctx );
|
|
md2_starts( &ctx );
|
|
|
|
while( ( n = fread( buf, 1, sizeof( buf ), f ) ) > 0 )
|
|
md2_update( &ctx, buf, n );
|
|
|
|
if( ferror( f ) != 0 )
|
|
ret = POLARSSL_ERR_MD2_FILE_IO_ERROR;
|
|
else
|
|
md2_finish( &ctx, output );
|
|
|
|
md2_free( &ctx );
|
|
polarssl_zeroize( buf, sizeof( buf ) );
|
|
fclose( f );
|
|
|
|
return( ret );
|
|
}
|
|
#endif /* POLARSSL_FS_IO */
|
|
|
|
/*
|
|
* MD2 HMAC context setup
|
|
*/
|
|
void md2_hmac_starts( md2_context *ctx, const unsigned char *key,
|
|
size_t keylen )
|
|
{
|
|
size_t i;
|
|
unsigned char sum[16];
|
|
|
|
if( keylen > 16 )
|
|
{
|
|
md2( key, keylen, sum );
|
|
keylen = 16;
|
|
key = sum;
|
|
}
|
|
|
|
memset( ctx->ipad, 0x36, 16 );
|
|
memset( ctx->opad, 0x5C, 16 );
|
|
|
|
for( i = 0; i < keylen; i++ )
|
|
{
|
|
ctx->ipad[i] = (unsigned char)( ctx->ipad[i] ^ key[i] );
|
|
ctx->opad[i] = (unsigned char)( ctx->opad[i] ^ key[i] );
|
|
}
|
|
|
|
md2_starts( ctx );
|
|
md2_update( ctx, ctx->ipad, 16 );
|
|
|
|
polarssl_zeroize( sum, sizeof( sum ) );
|
|
}
|
|
|
|
/*
|
|
* MD2 HMAC process buffer
|
|
*/
|
|
void md2_hmac_update( md2_context *ctx, const unsigned char *input,
|
|
size_t ilen )
|
|
{
|
|
md2_update( ctx, input, ilen );
|
|
}
|
|
|
|
/*
|
|
* MD2 HMAC final digest
|
|
*/
|
|
void md2_hmac_finish( md2_context *ctx, unsigned char output[16] )
|
|
{
|
|
unsigned char tmpbuf[16];
|
|
|
|
md2_finish( ctx, tmpbuf );
|
|
md2_starts( ctx );
|
|
md2_update( ctx, ctx->opad, 16 );
|
|
md2_update( ctx, tmpbuf, 16 );
|
|
md2_finish( ctx, output );
|
|
|
|
polarssl_zeroize( tmpbuf, sizeof( tmpbuf ) );
|
|
}
|
|
|
|
/*
|
|
* MD2 HMAC context reset
|
|
*/
|
|
void md2_hmac_reset( md2_context *ctx )
|
|
{
|
|
md2_starts( ctx );
|
|
md2_update( ctx, ctx->ipad, 16 );
|
|
}
|
|
|
|
/*
|
|
* output = HMAC-MD2( hmac key, input buffer )
|
|
*/
|
|
void md2_hmac( const unsigned char *key, size_t keylen,
|
|
const unsigned char *input, size_t ilen,
|
|
unsigned char output[16] )
|
|
{
|
|
md2_context ctx;
|
|
|
|
md2_init( &ctx );
|
|
md2_hmac_starts( &ctx, key, keylen );
|
|
md2_hmac_update( &ctx, input, ilen );
|
|
md2_hmac_finish( &ctx, output );
|
|
md2_free( &ctx );
|
|
}
|
|
|
|
#if defined(POLARSSL_SELF_TEST)
|
|
|
|
/*
|
|
* RFC 1319 test vectors
|
|
*/
|
|
static const char md2_test_str[7][81] =
|
|
{
|
|
{ "" },
|
|
{ "a" },
|
|
{ "abc" },
|
|
{ "message digest" },
|
|
{ "abcdefghijklmnopqrstuvwxyz" },
|
|
{ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789" },
|
|
{ "12345678901234567890123456789012345678901234567890123456789012" \
|
|
"345678901234567890" }
|
|
};
|
|
|
|
static const unsigned char md2_test_sum[7][16] =
|
|
{
|
|
{ 0x83, 0x50, 0xE5, 0xA3, 0xE2, 0x4C, 0x15, 0x3D,
|
|
0xF2, 0x27, 0x5C, 0x9F, 0x80, 0x69, 0x27, 0x73 },
|
|
{ 0x32, 0xEC, 0x01, 0xEC, 0x4A, 0x6D, 0xAC, 0x72,
|
|
0xC0, 0xAB, 0x96, 0xFB, 0x34, 0xC0, 0xB5, 0xD1 },
|
|
{ 0xDA, 0x85, 0x3B, 0x0D, 0x3F, 0x88, 0xD9, 0x9B,
|
|
0x30, 0x28, 0x3A, 0x69, 0xE6, 0xDE, 0xD6, 0xBB },
|
|
{ 0xAB, 0x4F, 0x49, 0x6B, 0xFB, 0x2A, 0x53, 0x0B,
|
|
0x21, 0x9F, 0xF3, 0x30, 0x31, 0xFE, 0x06, 0xB0 },
|
|
{ 0x4E, 0x8D, 0xDF, 0xF3, 0x65, 0x02, 0x92, 0xAB,
|
|
0x5A, 0x41, 0x08, 0xC3, 0xAA, 0x47, 0x94, 0x0B },
|
|
{ 0xDA, 0x33, 0xDE, 0xF2, 0xA4, 0x2D, 0xF1, 0x39,
|
|
0x75, 0x35, 0x28, 0x46, 0xC3, 0x03, 0x38, 0xCD },
|
|
{ 0xD5, 0x97, 0x6F, 0x79, 0xD8, 0x3D, 0x3A, 0x0D,
|
|
0xC9, 0x80, 0x6C, 0x3C, 0x66, 0xF3, 0xEF, 0xD8 }
|
|
};
|
|
|
|
/*
|
|
* Checkup routine
|
|
*/
|
|
int md2_self_test( int verbose )
|
|
{
|
|
int i;
|
|
unsigned char md2sum[16];
|
|
|
|
for( i = 0; i < 7; i++ )
|
|
{
|
|
if( verbose != 0 )
|
|
polarssl_printf( " MD2 test #%d: ", i + 1 );
|
|
|
|
md2( (unsigned char *) md2_test_str[i],
|
|
strlen( md2_test_str[i] ), md2sum );
|
|
|
|
if( memcmp( md2sum, md2_test_sum[i], 16 ) != 0 )
|
|
{
|
|
if( verbose != 0 )
|
|
polarssl_printf( "failed\n" );
|
|
|
|
return( 1 );
|
|
}
|
|
|
|
if( verbose != 0 )
|
|
polarssl_printf( "passed\n" );
|
|
}
|
|
|
|
if( verbose != 0 )
|
|
polarssl_printf( "\n" );
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
#endif /* POLARSSL_SELF_TEST */
|
|
|
|
#endif /* POLARSSL_MD2_C */
|