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#include "global.h"
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#include "md5.h"
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# X9 ~8 s% U5 ~; e6 ?/* Constants for MD5Transform routine.
*/
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) G1 a' u0 }" n* ~7 E0 d% |#define S11 7
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#define S12 12
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#define S13 17
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#define S14 22
$ o* C( G0 i) b4 l6 c+ J( \+ y#define S21 5
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#define S22 9
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#define S23 14
3 t, g0 r1 O9 H# ~5 b5 h8 D/ p+ e#define S24 20
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#define S31 4
9 [6 W/ {$ l5 o8 p) D( p#define S32 11
/ X: ^' k( M0 {7 n! H4 |#define S33 16
# T2 @, R; F2 K0 y s2 D; f1 m#define S34 23
8 |! h# W7 {' @$ s$ z- @#define S41 6
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#define S42 10
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#define S43 15
4 }( m# d+ J' N" C' v/ e& P/ T5 w#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
2 b% h# R- K* {" E3 n# wstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
4 G. Q Q! F" Bstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
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static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
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static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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static 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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7 {* t- C; \; [4 u2 U; }: p0 b* ?/* F, G, H and I are basic MD5 functions.
*/
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#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
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#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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/* 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.
/ }. [- Y; b2 X6 l( G2 p. o- _Rotation is separate from addition to prevent recomputation.
*/
( a( n) x: j( |2 D7 O( } n5 o3 n) 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); \
}
) }: _" r ~& X- {#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); \
}
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#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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) x3 I: \& C8 v. K/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
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void MD5Init (context)
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MD5_CTX *context; /* context */
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context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
/ p" }5 Y0 O- B( z*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
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}
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" o7 ]3 I$ n0 V, D& n/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
; s# T& N U5 C( nvoid MD5Update (context, input, inputLen)
2 W: Q( m4 I8 d0 XMD5_CTX *context; /* context */
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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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