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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
$ Y: A0 Y j+ ^* E+ F' f#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
1 e& X, E# N$ x2 d#define S23 14
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#define S24 20
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#define S31 4
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#define S32 11
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#define S33 16
0 t3 W% J5 } ^- O' l#define S34 23
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#define S41 6
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#define S42 10
9 E" E" @7 e& f1 I; J. p#define S43 15
( G' n6 f/ \: ^" [$ o- e#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
! f r) o; r Nstatic 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));
b4 E" S3 O+ h$ A- n! k# Cstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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9 E- x# }5 t/ Q2 l' C! G8 q3 G7 ustatic 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.
*/
$ T9 o [7 v9 |& {! O. R#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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1 |& J7 B! n/ u) S/* 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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2 G/ s' ]8 ^; H E$ A$ q l/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
9 t5 g; p! f9 O; F& ^Rotation is separate from addition to prevent recomputation.
*/
& P" k* X" k ~5 v# t6 `8 l* W7 C#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); \
}
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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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/* 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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; P2 f$ y2 ]# t/ a. E" w9 H/* 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 */
% t. {- d. V2 A4 ~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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