c code
Header source file: md2.h
/**
* \file md2.h
*/
#ifndef XYSSL_MD2_H
#define XYSSL_MD2_H
/**
* \brief MD2 context structure
*/
typedef struct
{
unsigned char cksum[16]; /*!< checksum of the data block */
unsigned char state[48]; /*!< intermediate digest state */
unsigned char buffer[16]; /*!< data block being processed */
unsigned char ipad[64]; /*!< HMAC: inner padding */
unsigned char opad[64]; /*!< HMAC: outer padding */
int left; /*!< amount of data in buffer */
}
md2_context;
#ifdef __cplusplus
extern "C" {
#endif
/**
* \brief MD2 context setup
*
* \param ctx context to be initialized
*/
void md2_starts( md2_context *ctx );
/**
* \brief MD2 process buffer
*
* \param ctx MD2 context
* \param input buffer holding the data
* \param ilen length of the input data
*/
void md2_update( md2_context *ctx, unsigned char *input, int ilen );
/**
* \brief MD2 final digest
*
* \param ctx MD2 context
* \param output MD2 checksum result
*/
void md2_finish( md2_context *ctx, unsigned char output[16] );
/
**
* \brief Output = MD2( input buffer )
*
* \param input buffer holding the data
* \param ilen length of the input data
* \param output MD2 checksum result
*/
void md2( unsigned char *input, int ilen, unsigned char output[16] );
/**
* \brief Output = MD2( file contents )
*
* \param path input file name
* \param output MD2 checksum result
*
* \return 0 if successful, 1 if fopen failed,
* or 2 if fread failed
*/
int md2_file( char *path, unsigned char output[16] );
/**
* \brief MD2 HMAC context setup
*
* \param ctx HMAC context to be initialized
* \param key HMAC secret key
* \param keylen length of the HMAC key
*/
void md2_hmac_starts( md2_context *ctx, unsigned char *key, int keylen );
/**
* \brief MD2 HMAC process buffer
*
* \param ctx HMAC context
* \param input buffer holding the data
* \param ilen length of the input data
*/
void md2_hmac_update( md2_context *ctx, unsigned char *input, int ilen );
/**
* \brief MD2 HMAC final digest
*
* \param ctx HMAC context
* \param output MD2 HMAC checksum result
*/
void md2_hmac_finish( md2_context *ctx, unsigned char output[16] );
/**
* \brief Output = HMAC-MD2( hmac key, input buffer )
*
* \param key HMAC secret key
* \param keylen length of the HMAC key
* \param input buffer holding the data
* \param ilen length of the input data
* \param output HMAC-MD2 result
*/
void md2_hmac( unsigned char *key, int keylen,
unsigned char *input, int ilen,
unsigned char output[16] );
/**
* \brief Checkup routine
*
* \return 0 if successful, or 1 if the test failed
*/
int md2_self_test( int verbose );
#ifdef __cplusplus
}
#endif
#endif /* md2.h */C source file: md2.c
/*
* RFC 1115/1319 compliant MD2 implementation
*
* Copyright (C) 2006-2007 Christophe Devine
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General P
ublic
* License, version 2.1 as published by the Free Software Foundation.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; 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.
*
* /
* /
*/
#include "xyssl/config.h"
#if defined(XYSSL_MD2_C)
#include "xyssl/md2.h"
#include <string.h>
#include <stdio.h>
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
};
/*
* MD2 context setup
*/
void md2_starts( md2_context *ctx )
{
memset( ctx, 0, sizeof( md2_context ) );
}
static 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, unsigned char *input, int ilen )
{
int fill;
while( ilen > 0 )
{
if( ctx->left + ilen > 16 )
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] )
{
int 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 );
}
/*
* output = MD2( input buffer )
*/
void md2( unsigned char *input, int ilen, unsigned char output[16] )
{
md2_context ctx;
md2_starts( &ctx );
md2_update( &ctx, input, ilen );
md2_finish( &ctx, output );
memset( &ctx, 0, sizeof( md2_context ) );
}
/*
* output = MD2( file contents )
*/
int md2_file( char *path, unsigned char output[16] )
{
FILE *f;
size_t n;
md2_context ctx;
unsigned char buf[1024];
if( ( f = fopen( path, "rb" ) ) == NULL )
return( 1 );
md2_starts( &ctx );
while( ( n = fread( buf, 1, sizeof( buf ), f ) ) > 0 )
md2_update( &ctx, buf, (int) n );
md2_finish( &ctx, output );
memset( &ctx, 0, sizeof( md2_context ) );
if( ferror( f ) != 0 )
{
fclose( f );
return( 2 );
}
fclose( f );
return( 0 );
}
/*
* MD2 HMAC context setup
*/
void md2_hmac_starts( md2_context *ctx, unsigned char *key, int keylen )
{
int i;
unsigned char sum[16];
if( keylen > 64 )
{
md2( key, keylen, sum );
keylen = 16;
key = sum;
}
memset( ctx->ipad, 0x36, 64 );
memset( ctx->opad, 0x5C, 64 );
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, 64 );
memset( sum, 0, sizeof( sum ) );
}
/*
* MD2 HMAC process buffer
*/
void md2_hmac_update( md2_context *ctx, unsigned char *input, int 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, 64 );
md2_update( ctx, tmpbuf, 16 );
md2_finish( ctx, output );
memset( tmpbuf, 0, sizeof( tmpbuf ) );
}
/*
* output = HMAC-MD2( hmac key, input buffer )
*/
void md2_hmac( unsigned char *key, int keylen, unsigned char *input, int ilen,
unsigned char output[16] )
{
md2_context ctx;
md2_hmac_starts( &ctx, key, keylen );
md2_hmac_update( &ctx, input, ilen );
md2_hmac_finish( &ctx, output );
memset( &ctx, 0, sizeof(
md2_context ) );
}
#if defined(XYSSL_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旗舰28源码
*/
int md2_self_test( int verbose )
{
int i;
unsigned char md2sum[16];
for( i = 0; i < 7; i++ )
{
if( verbose != 0 )
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 )
printf( "failed\n" );
return( 1 );
}
if( verbose != 0 )
printf( "passed\n" );
}
if( verbose != 0 )
printf( "\n" );
return( 0 );
}
#endif
#endif

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