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#include "global.h"
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#include "md5.h"
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/* Constants for MD5Transform routine.
*/
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, a/ M: T: |& F7 S, m! L. E( J7 p; S/ a#define S11 7
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#define S12 12
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#define S13 17
. D1 K- r! i* ^#define S14 22
) }' m% X+ U2 f7 Z, J2 K#define S21 5
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#define S22 9
3 r# ~' b l( m* x* }) K0 ^#define S23 14
1 ?) D" |9 F+ e+ }3 e0 V# O#define S24 20
6 k% k4 n3 O) w#define S31 4
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#define S32 11
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#define S33 16
+ Q( T1 X7 M4 {/ a9 z% }/ A1 [#define S34 23
2 ]6 o- l6 S+ ?* Y! T/ i& ]#define S41 6
; `2 h! j( w7 c/ `, l8 i#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]));
& ^. p% Y8 T2 Z1 p1 V' Pstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
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static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
$ |6 D, e$ }' r! j3 h* w& k1 s+ vstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
, `1 C4 M. u1 k! O0 T* P0 Sstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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3 E+ R/ N* {0 w) p2 Wstatic 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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2 W* s/ E) S0 T% b/* F, G, H and I are basic MD5 functions.
*/
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#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
/ v* J9 n$ R9 W' Y7 J; k#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
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#define H(x, y, z) ((x) ^ (y) ^ (z))
. w& i/ G$ l2 m `9 x8 \" v/ r! T#define I(x, y, z) ((y) ^ ((x) | (~z)))
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( q+ {/ X/ x0 c: U0 T7 r# g/* ROTATE_LEFT rotates x left n bits.
*/
! J6 E2 Y) P3 r1 [- X#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.
*/
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#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
. \3 t* l; {! ^; f, q2 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); \
}
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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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6 l6 O, d N Q4 Z( z. y/* 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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) |4 a: U5 ]/ C/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
g' Y: D; F% x, \3 ^void MD5Update (context, input, inputLen)
9 D2 e3 W' s2 k- GMD5_CTX *context; /* context */
( T5 \/ D* K' C' s% G0 N( punsigned 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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