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- /*
- * RFC 1321 compliant MD5 implementation
- *
- * Copyright (C) 2001-2003 Christophe Devine
- *
- * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
- #include "../../inc/cs.h"
- #include "../../inc/cs_str.h"
- #ifndef uint8
- #define uint8 unsigned char
- #endif
- #ifndef uint32
- #define uint32 unsigned long int
- #endif
- #define uint32_t unsigned int
- #define uint8_t unsigned char
- #define int_least16_t int
- typedef struct
- {
- uint32 total[2];
- uint32 state[4];
- uint8 buffer[64];
- }md5_context;
- #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 ); \
- }
- static 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;
- }
- static 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;
- }
- static 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
- };
- static 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 );
- }
- CS_API u_char *cs_md5(u_char *d, const u_char *s, size_t n) {
- int i;
- md5_context ctx;
- u_char md5sum[16];
- static u_char hex[] = "0123456789abcdef";
- u_char *dst = d;
-
- md5_starts(&ctx);
- md5_update(&ctx, (uint8 *)s, n);
- md5_finish(&ctx, md5sum);
-
- for (i = 0; i < 16; i++) {
- *d++ = hex[md5sum[i] >> 4];
- *d++ = hex[md5sum[i] & 0xf];
- }
- return (dst);
- }
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