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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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#define S11 7
" q- ?7 W+ d& [0 k- n0 ?# y: s#define S12 12
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#define S13 17
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#define S14 22
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#define S21 5
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#define S22 9
5 x$ d7 [! [& a" r: X- V#define S23 14
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#define S24 20
6 Q! v+ W2 a9 J# N#define S31 4
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#define S32 11
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#define S33 16
) T. _- M& ?2 p#define S34 23
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#define S41 6
6 D" N( h2 Z9 }2 g7 V7 t#define S42 10
7 K9 ?; B7 d8 ~. d. ^* G/ W) `: Y#define S43 15
9 S/ j @8 n$ |! `" d$ Q$ g, T#define S44 21
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/ F, M+ }4 _ P; ?$ {' |static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
4 v4 j, R; S: o) Z5 S7 ^# cstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
: u( H6 p2 c- F% Nstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
" ]& o! B; {5 U! F6 nstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
. q2 m2 o, r/ U2 b8 g$ xstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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' F P# T1 L3 a# kstatic 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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/* F, G, H and I are basic MD5 functions.
*/
" [: g3 Y! @7 M9 f. A6 c" k#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
" ~+ j+ z% S! ?2 V0 L; r, o#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
. A S- }3 b3 w x/ U1 N- ^#define H(x, y, z) ((x) ^ (y) ^ (z))
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#define I(x, y, z) ((y) ^ ((x) | (~z)))
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& G4 b3 J6 G' \8 l! `0 T! z) [/* 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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; L" q9 |; |3 \# G+ [) Q$ F/* 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.
*/
& B8 B) ^1 i3 L \#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
& n; R- a1 A7 X; D2 ^#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
9 r0 `5 H$ D/ ^' R) z5 B- @( I; i#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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/* 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;
# O2 w/ V8 q5 ~0 _; o7 p- z}
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/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
# M p; T3 y. f& }* vvoid MD5Update (context, input, inputLen)
/ j$ [, p. |4 Y' a2 oMD5_CTX *context; /* context */
( |- b7 Q0 k5 n; Zunsigned 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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