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#include "global.h"
' }9 q4 {5 R. w#include "md5.h"
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4 I8 F, D/ u) Y% x/* Constants for MD5Transform routine.
*/
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. E Z% c* v9 V( s8 K/ E. h! K#define S11 7
) e+ p7 r9 h1 y! G; L9 j#define S12 12
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#define S13 17
9 ?$ v3 V. j/ v; w- t* h D( J#define S14 22
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#define S21 5
2 c. w8 J, ^ n) r0 t9 N#define S22 9
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#define S23 14
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#define S24 20
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#define S31 4
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#define S32 11
' `9 h7 m" R4 a* \#define S33 16
4 F* g9 I3 X. v) W' |7 l. k#define S34 23
+ C5 I; ?, B( t! w. \, t#define S41 6
' [: {, X& a) _& ?0 _& y#define S42 10
* t3 P: P4 w, F" ]0 m* }
#define S43 15
& J, H( D4 F5 G9 l#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
2 L: x( t) \* a" ]/ r! z9 hstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
2 T+ w. p; ?- \; Istatic 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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! k+ Q3 t- r! U' Astatic 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.
*/
) w2 y( g& ? M. m' n1 ?& s#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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8 { i7 U' p/ ]: k/ S, z1 I& h V# x6 L/* 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.
! u: ]0 x+ H) a: u0 u, vRotation is separate from addition to prevent recomputation.
*/
5 k+ W" `: R0 Z" f' n6 {
#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
4 k: v- _2 }" n A, ~#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
m6 e4 m4 Z, O( d2 h, ?( x3 S#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
( H, e, X. ^2 K; x( R2 g* q, x# y5 c#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)
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MD5_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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/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
2 M: f* M( o( H4 G# t9 C wvoid MD5Update (context, input, inputLen)
% k1 G/ B' p" B: ]6 ~MD5_CTX *context; /* context */
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unsigned char *input; /* input block */
, k& b9 D/ ~& A$ tunsigned 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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