mirror of
https://github.com/cryb-to/cryb-to.git
synced 2024-12-22 20:41:08 +00:00
356 lines
9.3 KiB
C
356 lines
9.3 KiB
C
/*
|
|
* Copyright (c) 2006-2007 Christophe Devine
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote
|
|
* products derived from this software without specific prior written
|
|
* permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $Cryb$
|
|
*/
|
|
/*
|
|
* The MD4 algorithm was designed by Ron Rivest in 1990.
|
|
*
|
|
* http://www.ietf.org/rfc/rfc1186.txt
|
|
* http://www.ietf.org/rfc/rfc1320.txt
|
|
*/
|
|
|
|
#include "cryb/impl.h"
|
|
|
|
#include <string.h>
|
|
|
|
#include <cryb/digest.h>
|
|
#include <cryb/md4.h>
|
|
|
|
/*
|
|
* 32-bit integer manipulation macros (little endian)
|
|
*/
|
|
#ifndef GET_ULONG_LE
|
|
#define GET_ULONG_LE(n,b,i) \
|
|
do { \
|
|
(n) = ( (unsigned long) (b)[(i) ] ) \
|
|
| ( (unsigned long) (b)[(i) + 1] << 8 ) \
|
|
| ( (unsigned long) (b)[(i) + 2] << 16 ) \
|
|
| ( (unsigned long) (b)[(i) + 3] << 24 ); \
|
|
} while (0)
|
|
#endif
|
|
|
|
#ifndef PUT_ULONG_LE
|
|
#define PUT_ULONG_LE(n,b,i) \
|
|
do { \
|
|
(b)[(i) ] = (unsigned char) ( (n) ); \
|
|
(b)[(i) + 1] = (unsigned char) ( (n) >> 8 ); \
|
|
(b)[(i) + 2] = (unsigned char) ( (n) >> 16 ); \
|
|
(b)[(i) + 3] = (unsigned char) ( (n) >> 24 ); \
|
|
} while (0)
|
|
#endif
|
|
|
|
/*
|
|
* MD4 context setup
|
|
*/
|
|
void md4_init( md4_ctx *ctx )
|
|
{
|
|
ctx->total[0] = 0;
|
|
ctx->total[1] = 0;
|
|
|
|
ctx->state[0] = 0x67452301;
|
|
ctx->state[1] = 0xEFCDAB89;
|
|
ctx->state[2] = 0x98BADCFE;
|
|
ctx->state[3] = 0x10325476;
|
|
}
|
|
|
|
static void md4_process( md4_ctx *ctx, const unsigned char *data )
|
|
{
|
|
unsigned long X[16], A, B, C, D;
|
|
|
|
GET_ULONG_LE( X[ 0], data, 0 );
|
|
GET_ULONG_LE( X[ 1], data, 4 );
|
|
GET_ULONG_LE( X[ 2], data, 8 );
|
|
GET_ULONG_LE( X[ 3], data, 12 );
|
|
GET_ULONG_LE( X[ 4], data, 16 );
|
|
GET_ULONG_LE( X[ 5], data, 20 );
|
|
GET_ULONG_LE( X[ 6], data, 24 );
|
|
GET_ULONG_LE( X[ 7], data, 28 );
|
|
GET_ULONG_LE( X[ 8], data, 32 );
|
|
GET_ULONG_LE( X[ 9], data, 36 );
|
|
GET_ULONG_LE( X[10], data, 40 );
|
|
GET_ULONG_LE( X[11], data, 44 );
|
|
GET_ULONG_LE( X[12], data, 48 );
|
|
GET_ULONG_LE( X[13], data, 52 );
|
|
GET_ULONG_LE( X[14], data, 56 );
|
|
GET_ULONG_LE( X[15], data, 60 );
|
|
|
|
#define S(x,n) ((x << n) | ((x & 0xFFFFFFFF) >> (32 - n)))
|
|
|
|
A = ctx->state[0];
|
|
B = ctx->state[1];
|
|
C = ctx->state[2];
|
|
D = ctx->state[3];
|
|
|
|
#define F(x, y, z) ((x & y) | ((~x) & z))
|
|
#define P(a,b,c,d,x,s) { a += F(b,c,d) + x; a = S(a,s); }
|
|
|
|
P( A, B, C, D, X[ 0], 3 );
|
|
P( D, A, B, C, X[ 1], 7 );
|
|
P( C, D, A, B, X[ 2], 11 );
|
|
P( B, C, D, A, X[ 3], 19 );
|
|
P( A, B, C, D, X[ 4], 3 );
|
|
P( D, A, B, C, X[ 5], 7 );
|
|
P( C, D, A, B, X[ 6], 11 );
|
|
P( B, C, D, A, X[ 7], 19 );
|
|
P( A, B, C, D, X[ 8], 3 );
|
|
P( D, A, B, C, X[ 9], 7 );
|
|
P( C, D, A, B, X[10], 11 );
|
|
P( B, C, D, A, X[11], 19 );
|
|
P( A, B, C, D, X[12], 3 );
|
|
P( D, A, B, C, X[13], 7 );
|
|
P( C, D, A, B, X[14], 11 );
|
|
P( B, C, D, A, X[15], 19 );
|
|
|
|
#undef P
|
|
#undef F
|
|
|
|
#define F(x,y,z) ((x & y) | (x & z) | (y & z))
|
|
#define P(a,b,c,d,x,s) { a += F(b,c,d) + x + 0x5A827999; a = S(a,s); }
|
|
|
|
P( A, B, C, D, X[ 0], 3 );
|
|
P( D, A, B, C, X[ 4], 5 );
|
|
P( C, D, A, B, X[ 8], 9 );
|
|
P( B, C, D, A, X[12], 13 );
|
|
P( A, B, C, D, X[ 1], 3 );
|
|
P( D, A, B, C, X[ 5], 5 );
|
|
P( C, D, A, B, X[ 9], 9 );
|
|
P( B, C, D, A, X[13], 13 );
|
|
P( A, B, C, D, X[ 2], 3 );
|
|
P( D, A, B, C, X[ 6], 5 );
|
|
P( C, D, A, B, X[10], 9 );
|
|
P( B, C, D, A, X[14], 13 );
|
|
P( A, B, C, D, X[ 3], 3 );
|
|
P( D, A, B, C, X[ 7], 5 );
|
|
P( C, D, A, B, X[11], 9 );
|
|
P( B, C, D, A, X[15], 13 );
|
|
|
|
#undef P
|
|
#undef F
|
|
|
|
#define F(x,y,z) (x ^ y ^ z)
|
|
#define P(a,b,c,d,x,s) { a += F(b,c,d) + x + 0x6ED9EBA1; a = S(a,s); }
|
|
|
|
P( A, B, C, D, X[ 0], 3 );
|
|
P( D, A, B, C, X[ 8], 9 );
|
|
P( C, D, A, B, X[ 4], 11 );
|
|
P( B, C, D, A, X[12], 15 );
|
|
P( A, B, C, D, X[ 2], 3 );
|
|
P( D, A, B, C, X[10], 9 );
|
|
P( C, D, A, B, X[ 6], 11 );
|
|
P( B, C, D, A, X[14], 15 );
|
|
P( A, B, C, D, X[ 1], 3 );
|
|
P( D, A, B, C, X[ 9], 9 );
|
|
P( C, D, A, B, X[ 5], 11 );
|
|
P( B, C, D, A, X[13], 15 );
|
|
P( A, B, C, D, X[ 3], 3 );
|
|
P( D, A, B, C, X[11], 9 );
|
|
P( C, D, A, B, X[ 7], 11 );
|
|
P( B, C, D, A, X[15], 15 );
|
|
|
|
#undef F
|
|
#undef P
|
|
|
|
ctx->state[0] += A;
|
|
ctx->state[1] += B;
|
|
ctx->state[2] += C;
|
|
ctx->state[3] += D;
|
|
}
|
|
|
|
/*
|
|
* MD4 process buffer
|
|
*/
|
|
void md4_update( md4_ctx *ctx, const void *input, int ilen )
|
|
{
|
|
int fill;
|
|
unsigned long left;
|
|
|
|
if( ilen <= 0 )
|
|
return;
|
|
|
|
left = ctx->total[0] & 0x3F;
|
|
fill = 64 - left;
|
|
|
|
ctx->total[0] += ilen;
|
|
ctx->total[0] &= 0xFFFFFFFF;
|
|
|
|
if( ctx->total[0] < (unsigned long) ilen )
|
|
ctx->total[1]++;
|
|
|
|
if( left && ilen >= fill )
|
|
{
|
|
memcpy( (void *) (ctx->buffer + left),
|
|
(void *) input, fill );
|
|
md4_process( ctx, ctx->buffer );
|
|
input += fill;
|
|
ilen -= fill;
|
|
left = 0;
|
|
}
|
|
|
|
while( ilen >= 64 )
|
|
{
|
|
md4_process( ctx, input );
|
|
input += 64;
|
|
ilen -= 64;
|
|
}
|
|
|
|
if( ilen > 0 )
|
|
{
|
|
memcpy( (void *) (ctx->buffer + left),
|
|
(void *) input, ilen );
|
|
}
|
|
}
|
|
|
|
static const unsigned char md4_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
|
|
};
|
|
|
|
/*
|
|
* MD4 final digest
|
|
*/
|
|
void md4_final( md4_ctx *ctx, unsigned char *output )
|
|
{
|
|
unsigned long last, padn;
|
|
unsigned long high, low;
|
|
unsigned char msglen[8];
|
|
|
|
high = ( ctx->total[0] >> 29 )
|
|
| ( ctx->total[1] << 3 );
|
|
low = ( ctx->total[0] << 3 );
|
|
|
|
PUT_ULONG_LE( low, msglen, 0 );
|
|
PUT_ULONG_LE( high, msglen, 4 );
|
|
|
|
last = ctx->total[0] & 0x3F;
|
|
padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );
|
|
|
|
md4_update( ctx, md4_padding, padn );
|
|
md4_update( ctx, msglen, 8 );
|
|
|
|
PUT_ULONG_LE( ctx->state[0], output, 0 );
|
|
PUT_ULONG_LE( ctx->state[1], output, 4 );
|
|
PUT_ULONG_LE( ctx->state[2], output, 8 );
|
|
PUT_ULONG_LE( ctx->state[3], output, 12 );
|
|
}
|
|
|
|
/*
|
|
* output = MD4( input buffer )
|
|
*/
|
|
void md4_complete( const void *input, int ilen, unsigned char *output )
|
|
{
|
|
md4_ctx ctx;
|
|
|
|
md4_init( &ctx );
|
|
md4_update( &ctx, input, ilen );
|
|
md4_final( &ctx, output );
|
|
|
|
memset( &ctx, 0, sizeof( md4_ctx ) );
|
|
}
|
|
|
|
/*
|
|
* MD4 HMAC context setup
|
|
*/
|
|
void md4_hmac_init( md4_ctx *ctx, unsigned char *key, int keylen )
|
|
{
|
|
int i;
|
|
unsigned char sum[16];
|
|
|
|
if( keylen > 64 )
|
|
{
|
|
md4_complete( 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] );
|
|
}
|
|
|
|
md4_init( ctx );
|
|
md4_update( ctx, ctx->ipad, 64 );
|
|
|
|
memset( sum, 0, sizeof( sum ) );
|
|
}
|
|
|
|
/*
|
|
* MD4 HMAC process buffer
|
|
*/
|
|
void md4_hmac_update( md4_ctx *ctx, unsigned char *input, int ilen )
|
|
{
|
|
md4_update( ctx, input, ilen );
|
|
}
|
|
|
|
/*
|
|
* MD4 HMAC final digest
|
|
*/
|
|
void md4_hmac_final( md4_ctx *ctx, unsigned char *output )
|
|
{
|
|
unsigned char tmpbuf[MD4_DIGEST_LEN];
|
|
|
|
md4_final( ctx, tmpbuf );
|
|
md4_init( ctx );
|
|
md4_update( ctx, ctx->opad, 64 );
|
|
md4_update( ctx, tmpbuf, 16 );
|
|
md4_final( ctx, output );
|
|
|
|
memset( tmpbuf, 0, sizeof( tmpbuf ) );
|
|
}
|
|
|
|
/*
|
|
* output = HMAC-MD4( hmac key, input buffer )
|
|
*/
|
|
void md4_hmac_complete( unsigned char *key, int keylen, unsigned char *input, int ilen,
|
|
unsigned char output[16] )
|
|
{
|
|
md4_ctx ctx;
|
|
|
|
md4_hmac_init( &ctx, key, keylen );
|
|
md4_hmac_update( &ctx, input, ilen );
|
|
md4_hmac_final( &ctx, output );
|
|
|
|
memset( &ctx, 0, sizeof( md4_ctx ) );
|
|
}
|
|
|
|
struct digest_algorithm md4_digest = {
|
|
.name = "md4",
|
|
.contextlen = sizeof md4_digest,
|
|
.digestlen = MD4_DIGEST_LEN,
|
|
.init = (digest_init_func)md4_init,
|
|
.update = (digest_update_func)md4_update,
|
|
.final = (digest_final_func)md4_final,
|
|
.complete = (digest_complete_func)md4_complete,
|
|
};
|