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#include "global.h"
9 G6 Y5 K) R# O6 W#include "md5.h"
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/* Constants for MD5Transform routine.
*/
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- {9 g0 _1 \6 `#define S11 7
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#define S12 12
* z' l1 m, k N8 T# a/ G* L#define S13 17
/ W" Z, H- I$ J3 X#define S14 22
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#define S21 5
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#define S22 9
3 k# K' R f" h$ P#define S23 14
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#define S24 20
6 k. u5 j8 Z) z#define S31 4
. W: P- k+ Z4 K#define S32 11
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#define S33 16
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#define S34 23
5 |! e- d, y: T- l' F/ v2 i- M#define S41 6
5 d" Z* R4 E ?7 u* ? [#define S42 10
& {- {2 y6 I" l" v3 }) o#define S43 15
: ~# q7 _: d* ]- E# @#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
. T- L0 P1 d8 `2 F# F# F- Bstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
9 y8 x2 k/ y9 r7 n; J4 jstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
2 i, z) [0 Y+ e) G% ^" @static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
+ P7 u. a- o. C9 G" I2 I' Wstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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4 u$ m7 @$ v3 o/ |1 d4 Z' nstatic 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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/* F, G, H and I are basic MD5 functions.
*/
& C; o& ^ C4 b' D' x* N: a#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
! Y" I$ W# n- K% Q5 O#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
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#define H(x, y, z) ((x) ^ (y) ^ (z))
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#define I(x, y, z) ((y) ^ ((x) | (~z)))
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7 f6 e" Q! A8 R( F. M/* ROTATE_LEFT rotates x left n bits.
*/
9 g2 t, A; ?$ Q#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.
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Rotation is separate from addition to prevent recomputation.
*/
7 F$ s+ |$ n/ ^" _8 b0 w6 I/ X#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
% [: \* d: A1 e& x) z y1 i* I#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); \
}
0 i. q- O$ Q$ d#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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/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
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void MD5Init (context)
2 b9 y$ O; C4 J/ HMD5_CTX *context; /* context */
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{
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.
*/
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void MD5Update (context, input, inputLen)
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MD5_CTX *context; /* context */
7 O9 K. p. q# E: @( {unsigned char *input; /* input block */
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unsigned 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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