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#include "global.h"
7 `8 X0 J, R, l2 d#include "md5.h"
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/ `: y: N6 T: @8 A! q$ W2 j/* Constants for MD5Transform routine.
*/
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0 |5 H5 D' X9 g r- ?1 Y1 @( c#define S11 7
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#define S12 12
; w# `( |3 ?+ h4 f0 e, b' t$ b. e#define S13 17
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#define S14 22
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#define S21 5
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#define S22 9
* A; {' p% M V' _* _0 @5 k#define S23 14
! _* M( Z! y% \; r( S0 D1 S#define S24 20
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#define S31 4
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#define S32 11
( {% e' I. P1 r ~$ c. {#define S33 16
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#define S34 23
/ Y" y1 R* m) u( B* l#define S41 6
7 q: E$ A" v/ E5 {#define S42 10
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#define S43 15
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#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
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static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
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static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
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static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
3 a+ B: L, x4 Y/ p/ Z& Istatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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6 Q k) H; f0 Mstatic unsigned char 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
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};
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! `' A: L1 t2 F% G- y' X/ `9 `/* F, G, H and I are basic MD5 functions.
*/
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#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
]. o) s; O1 E- s c7 R+ |8 ?5 n" b#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
6 k% h! A: T/ t) N#define H(x, y, z) ((x) ^ (y) ^ (z))
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#define I(x, y, z) ((y) ^ ((x) | (~z)))
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/* ROTATE_LEFT rotates x left n bits.
*/
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#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
O) w: j" o. c' @" J8 c: A# ERotation is separate from addition to prevent recomputation.
*/
1 J* E' `0 `$ }#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
1 r0 `7 O1 t( K1 G; R#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
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#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
3 o7 t+ g9 f7 h' ~0 Y/ p#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
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; t: [9 S% @- G! S& t$ h3 V( J/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
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void MD5Init (context)
2 k: Y$ R$ x4 L, D0 n- TMD5_CTX *context; /* context */
1 d1 v6 n" p* e4 r) U% n{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
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*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
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}
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/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
& d# i3 U. A5 \7 ]& ]void MD5Update (context, input, inputLen)
4 W; ^2 w' ?, @2 T4 D2 J6 dMD5_CTX *context; /* context */
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unsigned char *input; /* input block */
" \9 u8 I+ m+ g' F" Xunsigned int inputLen; /* length of input block */
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{
unsigned int i, index, partLen;
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/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
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/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
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发表于 2004-11-26 20:11:20
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