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- Added XTEA Algorithm (Not used in SSL)

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This commit is contained in:
Paul Bakker 2009-01-04 18:15:48 +00:00
parent e0ccd0a7c3
commit 7a7c78fd02
6 changed files with 271 additions and 4 deletions
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5
ChangeLog
View file

@ -1,10 +1,9 @@
PolarSSL ChangeLog
= Version 0.x released on 2009-01-??
? * Migrated XySSL to PolarSSL
? * Added warning for use of old defines
* Migrated XySSL to PolarSSL
* Added XTEA symmetric cipher
? * Added Camellia symmetric cipher
? * Added XTEA symmetric cipher
? * Fixed dangerous bug that can cause a heap overflow in
rsa_pkcs1_decrypt

6
include/polarssl/config.h
View file

@ -299,4 +299,10 @@
*/
#define POLARSSL_X509_WRITE_C
/*
* Module: library/xtea.c
* Caller:
*/
#define POLARSSL_XTEA_C
#endif /* config.h */

72
include/polarssl/xtea.h Normal file
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@ -0,0 +1,72 @@
/**
* \file xtea.h
*
* Copyright (C) 2009 Paul Bakker
*
* 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.
*/
#ifndef POLARSSL_XTEA_H
#define POLARSSL_XTEA_H
#define XTEA_ENCRYPT 1
#define XTEA_DECRYPT 0
/**
* \brief XTEA context structure
*/
typedef struct
{
unsigned long k[4]; /*!< key */
}
xtea_context;
#ifdef __cplusplus
extern "C" {
#endif
/**
* \brief XTEA key schedule
*
* \param ctx XTEA context to be initialized
* \param key the secret key
*/
void xtea_setup( xtea_context *ctx, unsigned char key[16] );
/**
* \brief XTEA cipher function
*
* \param ctx XTEA context
* \param mode XTEA_ENCRYPT or XTEA_DECRYPT
* \param input 8-byte input block
* \param output 8-byte output block
*/
void xtea_crypt( xtea_context *ctx,
int mode,
unsigned char input[8],
unsigned char output[8] );
/*
* \brief Checkup routine
*
* \return 0 if successful, or 1 if the test failed
*/
int xtea_self_test( int verbose );
#ifdef __cplusplus
}
#endif
#endif /* xtea.h */

2
library/Makefile
View file

@ -24,7 +24,7 @@ OBJS= aes.o arc4.o base64.o \
net.o padlock.o rsa.o \
sha1.o sha2.o sha4.o \
ssl_cli.o ssl_srv.o ssl_tls.o \
timing.o x509parse.o
timing.o x509parse.o xtea.o
.SILENT:

184
library/xtea.c Normal file
View file

@ -0,0 +1,184 @@
/*
* An 32-bit implementation of the XTEA algorithm
*
* Copyright (C) 2009 Paul Bakker
*
* 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.
*/
#include "polarssl/config.h"
#if defined(POLARSSL_XTEA_C)
#include "polarssl/xtea.h"
#include <string.h>
/*
* 32-bit integer manipulation macros (big endian)
*/
#ifndef GET_ULONG_BE
#define GET_ULONG_BE(n,b,i) \
{ \
(n) = ( (unsigned long) (b)[(i) ] << 24 ) \
| ( (unsigned long) (b)[(i) + 1] << 16 ) \
| ( (unsigned long) (b)[(i) + 2] << 8 ) \
| ( (unsigned long) (b)[(i) + 3] ); \
}
#endif
#ifndef PUT_ULONG_BE
#define PUT_ULONG_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
/*
* XTEA key schedule
*/
void xtea_setup( xtea_context *ctx, unsigned char key[16] )
{
int i;
memset(ctx, 0, sizeof(xtea_context));
for( i = 0; i < 4; i++ )
{
GET_ULONG_BE( ctx->k[i], key, i << 2 );
}
}
/*
* XTEA encrypt function
*/
void xtea_crypt_ecb( xtea_context *ctx, int mode, unsigned char input[8], unsigned char output[8])
{
unsigned long *k, v0, v1, i;
k = ctx->k;
GET_ULONG_BE( v0, input, 0 );
GET_ULONG_BE( v1, input, 4 );
if( mode == XTEA_ENCRYPT )
{
unsigned long sum = 0, delta = 0x9E3779B9;
for( i = 0; i < 32; i++ )
{
v0 += (((v1 << 4) ^ (v1 >> 5)) + v1) ^ (sum + k[sum & 3]);
sum += delta;
v1 += (((v0 << 4) ^ (v0 >> 5)) + v0) ^ (sum + k[(sum>>11) & 3]);
}
}
else /* XTEA_DECRYPT */
{
unsigned long delta = 0x9E3779B9, sum = delta * 32;
for( i = 0; i < 32; i++ )
{
v1 -= (((v0 << 4) ^ (v0 >> 5)) + v0) ^ (sum + k[(sum>>11) & 3]);
sum -= delta;
v0 -= (((v1 << 4) ^ (v1 >> 5)) + v1) ^ (sum + k[sum & 3]);
}
}
PUT_ULONG_BE( v0, output, 0 );
PUT_ULONG_BE( v1, output, 4 );
}
#if defined(POLARSSL_SELF_TEST)
#include <string.h>
#include <stdio.h>
/*
* XTEA tests vectors (non-official)
*/
static const unsigned char xtea_test_key[6][16] =
{
{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f },
{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f },
{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f },
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }
};
static const unsigned char xtea_test_pt[6][8] =
{
{ 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48 },
{ 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41 },
{ 0x5a, 0x5b, 0x6e, 0x27, 0x89, 0x48, 0xd7, 0x7f },
{ 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48 },
{ 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41 },
{ 0x70, 0xe1, 0x22, 0x5d, 0x6e, 0x4e, 0x76, 0x55 }
};
static const unsigned char xtea_test_ct[6][8] =
{
{ 0x49, 0x7d, 0xf3, 0xd0, 0x72, 0x61, 0x2c, 0xb5 },
{ 0xe7, 0x8f, 0x2d, 0x13, 0x74, 0x43, 0x41, 0xd8 },
{ 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41 },
{ 0xa0, 0x39, 0x05, 0x89, 0xf8, 0xb8, 0xef, 0xa5 },
{ 0xed, 0x23, 0x37, 0x5a, 0x82, 0x1a, 0x8c, 0x2d },
{ 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41 }
};
/*
* Checkup routine
*/
int xtea_self_test( int verbose )
{
int i;
unsigned char buf[8];
xtea_context ctx;
for( i = 0; i < 6; i++ )
{
if( verbose != 0 )
printf( " XTEA test #%d: ", i + 1 );
memcpy( buf, xtea_test_pt[i], 8 );
xtea_setup( &ctx, (unsigned char *) xtea_test_key[i] );
xtea_crypt_ecb( &ctx, XTEA_ENCRYPT, buf, buf );
if( memcmp( buf, xtea_test_ct[i], 8 ) != 0 )
{
if( verbose != 0 )
printf( "failed\n" );
return( 1 );
}
if( verbose != 0 )
printf( "passed\n" );
}
if( verbose != 0 )
printf( "\n" );
return( 0 );
}
#endif
#endif

6
programs/test/selftest.c
View file

@ -42,6 +42,7 @@
#include "polarssl/bignum.h"
#include "polarssl/rsa.h"
#include "polarssl/x509.h"
#include "polarssl/xtea.h"
int main( int argc, char *argv[] )
{
@ -120,6 +121,11 @@ int main( int argc, char *argv[] )
return( ret );
#endif
#if defined(POLARSSL_XTEA_C)
if( ( ret = xtea_self_test( v ) ) != 0 )
return( ret );
#endif
if( v != 0 )
{
printf( " [ All tests passed ]\n\n" );