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| #include "stdafx.h"
#include "md5.h"
#include <string>
#pragma warning( disable : 4005 )
using namespace std;
namespace md5
{
#define GET_UINT32(n,b,i) \
{ \
(n) = ( (uint32) (b)[(i) ] ) \
| ( (uint32) (b)[(i) + 1] << 8 ) \
| ( (uint32) (b)[(i) + 2] << 16 ) \
| ( (uint32) (b)[(i) + 3] << 24 ); \
}
#define PUT_UINT32(n,b,i) \
{ \
(b)[(i) ] = (uint8) ( (n) ); \
(b)[(i) + 1] = (uint8) ( (n) >> 8 ); \
(b)[(i) + 2] = (uint8) ( (n) >> 16 ); \
(b)[(i) + 3] = (uint8) ( (n) >> 24 ); \
}
void md5_starts( md5_context *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 ;
}
void md5_process( md5_context *ctx, uint8 data[64 ] )
{
uint32 X[ 16 ], A, B, C, D;
GET_UINT32( X[ 0], data, 0 );
GET_UINT32( X[ 1], data, 4 );
GET_UINT32( X[ 2], data, 8 );
GET_UINT32( X[ 3], data, 12 );
GET_UINT32( X[ 4], data, 16 );
GET_UINT32( X[ 5], data, 20 );
GET_UINT32( X[ 6], data, 24 );
GET_UINT32( X[ 7], data, 28 );
GET_UINT32( X[ 8], data, 32 );
GET_UINT32( X[ 9], data, 36 );
GET_UINT32( X[ 10], data, 40 );
GET_UINT32( X[ 11], data, 44 );
GET_UINT32( X[ 12], data, 48 );
GET_UINT32( X[ 13], data, 52 );
GET_UINT32( X[ 14], data, 56 );
GET_UINT32( X[ 15], data, 60 );
#define S(x,n) ((x << n) | ((x & 0xFFFFFFFF) >> (32 - n)))
#define P(a,b,c,d,k,s,t) \
{ \
a += F(b,c,d) + X[k] + t; a = S(a,s) + b; \
}
A = ctx->state[ 0 ];
B = ctx->state[ 1 ];
C = ctx->state[ 2 ];
D = ctx->state[ 3 ];
#define F(x,y,z) (z ^ (x & (y ^ z)))
P( A, B, C, D, 0, 7, 0xD76AA478 );
P( D, A, B, C, 1, 12, 0xE8C7B756 );
P( C, D, A, B, 2, 17, 0x242070DB );
P( B, C, D, A, 3, 22, 0xC1BDCEEE );
P( A, B, C, D, 4, 7, 0xF57C0FAF );
P( D, A, B, C, 5, 12, 0x4787C62A );
P( C, D, A, B, 6, 17, 0xA8304613 );
P( B, C, D, A, 7, 22, 0xFD469501 );
P( A, B, C, D, 8, 7, 0x698098D8 );
P( D, A, B, C, 9, 12, 0x8B44F7AF );
P( C, D, A, B, 10, 17, 0xFFFF5BB1 );
P( B, C, D, A, 11, 22, 0x895CD7BE );
P( A, B, C, D, 12, 7, 0x6B901122 );
P( D, A, B, C, 13, 12, 0xFD987193 );
P( C, D, A, B, 14, 17, 0xA679438E );
P( B, C, D, A, 15, 22, 0x49B40821 );
#undef F
#define F(x,y,z) (y ^ (z & (x ^ y)))
P( A, B, C, D, 1, 5, 0xF61E2562 );
P( D, A, B, C, 6, 9, 0xC040B340 );
P( C, D, A, B, 11, 14, 0x265E5A51 );
P( B, C, D, A, 0, 20, 0xE9B6C7AA );
P( A, B, C, D, 5, 5, 0xD62F105D );
P( D, A, B, C, 10, 9, 0x02441453 );
P( C, D, A, B, 15, 14, 0xD8A1E681 );
P( B, C, D, A, 4, 20, 0xE7D3FBC8 );
P( A, B, C, D, 9, 5, 0x21E1CDE6 );
P( D, A, B, C, 14, 9, 0xC33707D6 );
P( C, D, A, B, 3, 14, 0xF4D50D87 );
P( B, C, D, A, 8, 20, 0x455A14ED );
P( A, B, C, D, 13, 5, 0xA9E3E905 );
P( D, A, B, C, 2, 9, 0xFCEFA3F8 );
P( C, D, A, B, 7, 14, 0x676F02D9 );
P( B, C, D, A, 12, 20, 0x8D2A4C8A );
#undef F
#define F(x,y,z) (x ^ y ^ z)
P( A, B, C, D, 5, 4, 0xFFFA3942 );
P( D, A, B, C, 8, 11, 0x8771F681 );
P( C, D, A, B, 11, 16, 0x6D9D6122 );
P( B, C, D, A, 14, 23, 0xFDE5380C );
P( A, B, C, D, 1, 4, 0xA4BEEA44 );
P( D, A, B, C, 4, 11, 0x4BDECFA9 );
P( C, D, A, B, 7, 16, 0xF6BB4B60 );
P( B, C, D, A, 10, 23, 0xBEBFBC70 );
P( A, B, C, D, 13, 4, 0x289B7EC6 );
P( D, A, B, C, 0, 11, 0xEAA127FA );
P( C, D, A, B, 3, 16, 0xD4EF3085 );
P( B, C, D, A, 6, 23, 0x04881D05 );
P( A, B, C, D, 9, 4, 0xD9D4D039 );
P( D, A, B, C, 12, 11, 0xE6DB99E5 );
P( C, D, A, B, 15, 16, 0x1FA27CF8 );
P( B, C, D, A, 2, 23, 0xC4AC5665 );
#undef F
#define F(x,y,z) (y ^ (x | ~z))
P( A, B, C, D, 0, 6, 0xF4292244 );
P( D, A, B, C, 7, 10, 0x432AFF97 );
P( C, D, A, B, 14, 15, 0xAB9423A7 );
P( B, C, D, A, 5, 21, 0xFC93A039 );
P( A, B, C, D, 12, 6, 0x655B59C3 );
P( D, A, B, C, 3, 10, 0x8F0CCC92 );
P( C, D, A, B, 10, 15, 0xFFEFF47D );
P( B, C, D, A, 1, 21, 0x85845DD1 );
P( A, B, C, D, 8, 6, 0x6FA87E4F );
P( D, A, B, C, 15, 10, 0xFE2CE6E0 );
P( C, D, A, B, 6, 15, 0xA3014314 );
P( B, C, D, A, 13, 21, 0x4E0811A1 );
P( A, B, C, D, 4, 6, 0xF7537E82 );
P( D, A, B, C, 11, 10, 0xBD3AF235 );
P( C, D, A, B, 2, 15, 0x2AD7D2BB );
P( B, C, D, A, 9, 21, 0xEB86D391 );
#undef F
ctx->state[ 0 ] += A;
ctx->state[ 1 ] += B;
ctx->state[ 2 ] += C;
ctx->state[ 3 ] += D;
}
void md5_update( md5_context *ctx, uint8 *input, uint32 length )
{
uint32 left, fill;
if( ! length ) return ;
left = ctx->total[ 0] & 0x3F ;
fill = 64 - left;
ctx->total[ 0 ] += length;
ctx->total[ 0] &= 0xFFFFFFFF ;
if( ctx->total[0 ] < length )
ctx->total[ 1 ]++;
if ( left && length >= fill )
{
memcpy( ( void *) (ctx->buffer + left),
( void *) input, fill );
md5_process( ctx, ctx->buffer );
length -= fill;
input += fill;
left = 0 ;
}
while( length >= 64 )
{
md5_process( ctx, input );
length -= 64 ;
input += 64 ;
}
if ( length )
{
memcpy( ( void *) (ctx->buffer + left),
( void *) input, length );
}
}
static uint8 md5_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
};
void md5_finish( md5_context *ctx, uint8 digest[16 ] )
{
uint32 last, padn;
uint32 high, low;
uint8 msglen[ 8 ];
high = ( ctx->total[ 0] >> 29 )
| ( ctx->total[ 1] << 3 );
low = ( ctx->total[ 0] << 3 );
PUT_UINT32( low, msglen, 0 );
PUT_UINT32( high, msglen, 4 );
last = ctx->total[ 0] & 0x3F ;
padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );
md5_update( ctx, md5_padding, padn );
md5_update( ctx, msglen, 8 );
PUT_UINT32( ctx->state[ 0], digest, 0 );
PUT_UINT32( ctx->state[ 1], digest, 4 );
PUT_UINT32( ctx->state[ 2], digest, 8 );
PUT_UINT32( ctx->state[ 3], digest, 12 );
}
} |
(
Сообщение от DJZT
