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#include "global.h"
# x9 W; [3 z/ Q# J0 l#include "md5.h"
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/* Constants for MD5Transform routine.
*/
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#define S11 7
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#define S12 12
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#define S13 17
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#define S14 22
* a( a; B4 F( Z7 }* e' C#define S21 5
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#define S22 9
) J" ?! R; M3 W8 G#define S23 14
/ G0 d& ]8 x9 y, `. Z4 V! v#define S24 20
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#define S31 4
+ l0 C& e. o8 B5 s#define S32 11
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#define S33 16
. P9 t& Z. k7 H% j#define S34 23
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#define S41 6
$ X) y x- B; H4 {6 g# Q/ b1 Y#define S42 10
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#define S43 15
9 W& ]2 U2 g7 P; |9 ]$ J0 u#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
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static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
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static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
* V' Z, r) g' {" {static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
' b2 K+ T2 g7 `/ j6 A. istatic 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.
*/
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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))
# d' D. u8 E2 c" O2 }6 T( ?9 x/ |#define I(x, y, z) ((y) ^ ((x) | (~z)))
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0 E; P$ a* G9 I/ |/* ROTATE_LEFT rotates x left n bits.
*/
2 _$ o! w( Y2 g' D3 J& [5 V6 i1 R#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); \
}
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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); \
}
8 ~* _1 j7 \/ f% a#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
* }* z* X/ V9 L7 [#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.
*/
: ^+ {. F# L8 G4 [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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/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
$ ^/ H, I3 n1 Tvoid MD5Update (context, input, inputLen)
6 f/ `' w% F* `! R" d+ @MD5_CTX *context; /* context */
( |5 D( P' V# q' h8 Zunsigned char *input; /* input block */
& e- t- m4 O+ ]% F) b% |+ yunsigned 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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