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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
: d! I" m0 n' o#define S12 12
$ m2 W, i+ H7 K! j4 C#define S13 17
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#define S14 22
4 R% A5 H. }8 Y( l, T( m#define S21 5
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#define S22 9
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#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
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#define S34 23
1 o5 c9 r% r, O6 P. z0 |#define S41 6
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#define S42 10
5 Q: C) U( Y% j#define S43 15
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#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
- R O" h) R$ ^7 e1 wstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
/ e/ N) q0 e Q8 _2 ^& t! Estatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
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static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
9 r# I! e) n' t# }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
. I+ U8 r1 S6 g, i};
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; N5 {( k9 w5 n% \: p' W# I/* F, G, H and I are basic MD5 functions.
*/
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#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
8 o* u& v( X0 F5 y, {) E. }#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
3 V" _5 @1 F" T$ t i: m#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 w* w% N6 Q/ ?- L0 A/* 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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/* 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); \
}
$ A! c$ C2 g; t6 a- W" ]2 x#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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$ q3 |' y$ I2 u$ S! U/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
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void MD5Init (context)
* u, ^6 T3 n% t/ j& L7 v- H/ tMD5_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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}
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/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
8 @# J6 H( W! y! _( fvoid MD5Update (context, input, inputLen)
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MD5_CTX *context; /* context */
; f. E( y' R9 K- Ounsigned 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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