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#include "global.h"
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#include "md5.h"
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- | m# J. r6 O( S/* Constants for MD5Transform routine.
*/
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#define S11 7
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#define S12 12
V# Z' T0 r2 B; r |; N3 i+ Q#define S13 17
/ Z3 b5 N( z7 x& ~3 B#define S14 22
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#define S21 5
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#define S22 9
3 ^4 I; @: ]2 O+ J) c: ?/ f#define S23 14
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#define S24 20
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#define S31 4
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#define S32 11
1 v2 N( c& R6 S5 r. Q1 _#define S33 16
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#define S34 23
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#define S41 6
) e$ N0 O9 G: n$ u1 c#define S42 10
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#define S43 15
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#define S44 21
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: v" W0 w8 W/ R: M, ystatic 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));
$ [* P# C+ p7 f) J7 Jstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
. j. l0 I$ m( \' V. u& @. |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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};
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5 Y6 S" U' T6 Y4 C. \8 F5 i/* F, G, H and I are basic MD5 functions.
*/
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#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
% y2 a1 t% T) Q! I7 @% q z O7 W#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
( v9 ?0 }" p- q#define H(x, y, z) ((x) ^ (y) ^ (z))
/ z# T1 V( K$ W* y" u5 p#define I(x, y, z) ((y) ^ ((x) | (~z)))
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+ \% n* d7 r) E/ ~" s8 h- J- e/* ROTATE_LEFT rotates x left n bits.
*/
4 J$ y6 H. g6 P( c$ m9 p#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.
% S6 L3 u( a7 q# qRotation is separate from addition to prevent recomputation.
*/
' \) f# U. l7 W#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
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#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
2 w O, o1 {0 ], u#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
5 s1 s% F5 d- R- K0 w#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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& S! }4 \: P ]2 E7 L* v) x/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
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void MD5Init (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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4 m6 L# l& N& K, s# I- y/* 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 */
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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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