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#include "global.h"
" A4 k3 W$ Z. H( Z" i#include "md5.h"
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, q' u1 T" V7 M1 G, d6 o/ ~% p/* Constants for MD5Transform routine.
*/
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#define S11 7
1 Y+ f6 Y' F' w#define S12 12
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#define S13 17
& Z8 s4 e; R6 A# l6 ?1 l1 M5 ~2 M; e#define S14 22
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#define S21 5
6 M+ t: I: L' v( a: U#define S22 9
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#define S23 14
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#define S24 20
: c R+ |, [3 a#define S31 4
. d! `4 S& P% B#define S32 11
# }* G( ?5 X: t#define S33 16
) L$ ~) g1 {" b#define S34 23
- N# Y# @9 D4 n#define S41 6
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#define S42 10
/ v( x# H" s$ i) G0 ^8 M6 k#define S43 15
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#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
: Y4 {' u) C j; u4 g. sstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
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static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
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static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
$ a/ b; z. `+ Ystatic 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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/* F, G, H and I are basic MD5 functions.
*/
- a9 E$ a5 d7 G1 W#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))
+ f% J# r g4 e' L3 R4 {9 a# r, d7 @#define I(x, y, z) ((y) ^ ((x) | (~z)))
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/* ROTATE_LEFT rotates x left n bits.
*/
. l- W2 K9 G, x: v% s4 ], x4 H! P#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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+ D8 H' x: `5 n8 E& k+ D/* 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.
*/
" j% R5 ^; y- N5 z; |#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
! S5 K0 j2 g# o* e#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); \
}
& Q4 K1 q+ J) R- W, S3 ~#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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' ~+ A3 }4 q$ N) e- @/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
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void MD5Init (context)
0 {' Q7 W; E- ^; [3 w( ?1 I) gMD5_CTX *context; /* context */
8 P4 t5 c* l- H- ?% q P{
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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}
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/* 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)
2 w& N! [- `* Z+ K7 b; BMD5_CTX *context; /* context */
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unsigned char *input; /* input block */
3 I) l ~0 R# v3 P: ]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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