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https://github.com/dolphin-emu/dolphin.git
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a48e284317
There were some fixes back on March 13th, 2014 for fixing compiling on MIPS64. Also some fixes on June 25th, 2014 for SPARC64 fixes. Probably more things, but those are what I care about.
284 lines
7.3 KiB
C
284 lines
7.3 KiB
C
/*
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* An 32-bit implementation of the XTEA algorithm
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*
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* Copyright (C) 2006-2014, Brainspark B.V.
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*
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* This file is part of PolarSSL (http://www.polarssl.org)
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* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#if !defined(POLARSSL_CONFIG_FILE)
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#include "polarssl/config.h"
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#else
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#include POLARSSL_CONFIG_FILE
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#endif
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#if defined(POLARSSL_XTEA_C)
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#include "polarssl/xtea.h"
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#if defined(POLARSSL_PLATFORM_C)
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#include "polarssl/platform.h"
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#else
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#define polarssl_printf printf
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#endif
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#if !defined(POLARSSL_XTEA_ALT)
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/* Implementation that should never be optimized out by the compiler */
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static void polarssl_zeroize( void *v, size_t n ) {
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volatile unsigned char *p = v; while( n-- ) *p++ = 0;
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}
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/*
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* 32-bit integer manipulation macros (big endian)
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*/
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#ifndef GET_UINT32_BE
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#define GET_UINT32_BE(n,b,i) \
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{ \
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(n) = ( (uint32_t) (b)[(i) ] << 24 ) \
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| ( (uint32_t) (b)[(i) + 1] << 16 ) \
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| ( (uint32_t) (b)[(i) + 2] << 8 ) \
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| ( (uint32_t) (b)[(i) + 3] ); \
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}
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#endif
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#ifndef PUT_UINT32_BE
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#define PUT_UINT32_BE(n,b,i) \
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{ \
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(b)[(i) ] = (unsigned char) ( (n) >> 24 ); \
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(b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \
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(b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \
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(b)[(i) + 3] = (unsigned char) ( (n) ); \
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}
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#endif
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void xtea_init( xtea_context *ctx )
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{
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memset( ctx, 0, sizeof( xtea_context ) );
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}
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void xtea_free( xtea_context *ctx )
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{
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if( ctx == NULL )
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return;
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polarssl_zeroize( ctx, sizeof( xtea_context ) );
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}
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/*
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* XTEA key schedule
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*/
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void xtea_setup( xtea_context *ctx, const unsigned char key[16] )
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{
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int i;
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memset( ctx, 0, sizeof(xtea_context) );
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for( i = 0; i < 4; i++ )
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{
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GET_UINT32_BE( ctx->k[i], key, i << 2 );
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}
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}
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/*
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* XTEA encrypt function
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*/
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int xtea_crypt_ecb( xtea_context *ctx, int mode,
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const unsigned char input[8], unsigned char output[8])
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{
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uint32_t *k, v0, v1, i;
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k = ctx->k;
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GET_UINT32_BE( v0, input, 0 );
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GET_UINT32_BE( v1, input, 4 );
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if( mode == XTEA_ENCRYPT )
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{
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uint32_t sum = 0, delta = 0x9E3779B9;
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for( i = 0; i < 32; i++ )
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{
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v0 += (((v1 << 4) ^ (v1 >> 5)) + v1) ^ (sum + k[sum & 3]);
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sum += delta;
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v1 += (((v0 << 4) ^ (v0 >> 5)) + v0) ^ (sum + k[(sum>>11) & 3]);
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}
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}
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else /* XTEA_DECRYPT */
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{
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uint32_t delta = 0x9E3779B9, sum = delta * 32;
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for( i = 0; i < 32; i++ )
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{
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v1 -= (((v0 << 4) ^ (v0 >> 5)) + v0) ^ (sum + k[(sum>>11) & 3]);
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sum -= delta;
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v0 -= (((v1 << 4) ^ (v1 >> 5)) + v1) ^ (sum + k[sum & 3]);
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}
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}
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PUT_UINT32_BE( v0, output, 0 );
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PUT_UINT32_BE( v1, output, 4 );
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return( 0 );
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}
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#if defined(POLARSSL_CIPHER_MODE_CBC)
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/*
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* XTEA-CBC buffer encryption/decryption
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*/
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int xtea_crypt_cbc( xtea_context *ctx, int mode, size_t length,
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unsigned char iv[8], const unsigned char *input,
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unsigned char *output)
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{
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int i;
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unsigned char temp[8];
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if( length % 8 )
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return( POLARSSL_ERR_XTEA_INVALID_INPUT_LENGTH );
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if( mode == XTEA_DECRYPT )
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{
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while( length > 0 )
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{
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memcpy( temp, input, 8 );
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xtea_crypt_ecb( ctx, mode, input, output );
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for( i = 0; i < 8; i++ )
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output[i] = (unsigned char)( output[i] ^ iv[i] );
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memcpy( iv, temp, 8 );
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input += 8;
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output += 8;
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length -= 8;
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}
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}
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else
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{
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while( length > 0 )
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{
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for( i = 0; i < 8; i++ )
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output[i] = (unsigned char)( input[i] ^ iv[i] );
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xtea_crypt_ecb( ctx, mode, output, output );
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memcpy( iv, output, 8 );
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input += 8;
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output += 8;
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length -= 8;
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}
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}
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return( 0 );
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}
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#endif /* POLARSSL_CIPHER_MODE_CBC */
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#endif /* !POLARSSL_XTEA_ALT */
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#if defined(POLARSSL_SELF_TEST)
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#include <string.h>
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#include <stdio.h>
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/*
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* XTEA tests vectors (non-official)
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*/
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static const unsigned char xtea_test_key[6][16] =
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{
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{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b,
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0x0c, 0x0d, 0x0e, 0x0f },
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{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b,
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0x0c, 0x0d, 0x0e, 0x0f },
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{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b,
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0x0c, 0x0d, 0x0e, 0x0f },
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{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00 },
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{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00 },
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{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00 }
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};
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static const unsigned char xtea_test_pt[6][8] =
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{
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{ 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48 },
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{ 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41 },
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{ 0x5a, 0x5b, 0x6e, 0x27, 0x89, 0x48, 0xd7, 0x7f },
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{ 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48 },
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{ 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41 },
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{ 0x70, 0xe1, 0x22, 0x5d, 0x6e, 0x4e, 0x76, 0x55 }
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};
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static const unsigned char xtea_test_ct[6][8] =
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{
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{ 0x49, 0x7d, 0xf3, 0xd0, 0x72, 0x61, 0x2c, 0xb5 },
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{ 0xe7, 0x8f, 0x2d, 0x13, 0x74, 0x43, 0x41, 0xd8 },
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{ 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41 },
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{ 0xa0, 0x39, 0x05, 0x89, 0xf8, 0xb8, 0xef, 0xa5 },
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{ 0xed, 0x23, 0x37, 0x5a, 0x82, 0x1a, 0x8c, 0x2d },
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{ 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41 }
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};
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/*
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* Checkup routine
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*/
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int xtea_self_test( int verbose )
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{
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int i, ret = 0;
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unsigned char buf[8];
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xtea_context ctx;
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xtea_init( &ctx );
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for( i = 0; i < 6; i++ )
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{
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if( verbose != 0 )
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polarssl_printf( " XTEA test #%d: ", i + 1 );
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memcpy( buf, xtea_test_pt[i], 8 );
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xtea_setup( &ctx, xtea_test_key[i] );
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xtea_crypt_ecb( &ctx, XTEA_ENCRYPT, buf, buf );
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if( memcmp( buf, xtea_test_ct[i], 8 ) != 0 )
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{
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if( verbose != 0 )
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polarssl_printf( "failed\n" );
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ret = 1;
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goto exit;
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}
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if( verbose != 0 )
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polarssl_printf( "passed\n" );
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}
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if( verbose != 0 )
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polarssl_printf( "\n" );
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exit:
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xtea_free( &ctx );
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return( ret );
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}
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#endif /* POLARSSL_SELF_TEST */
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#endif /* POLARSSL_XTEA_C */
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