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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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0 v: b1 u' t: P8 b3 h0 _( R#define S11 7
0 U/ G7 `% F% T) }#define S12 12
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#define S13 17
& g4 R# w: z( M! b2 ^#define S14 22
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#define S21 5
3 m4 o; X& w. Q) I* w& X1 Y* w$ G#define S22 9
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#define S23 14
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#define S24 20
, a/ {7 I& g7 i5 e* l#define S31 4
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#define S32 11
' R: q6 s4 c7 M0 x( f, V#define S33 16
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#define S34 23
% b) |& T2 u4 k% [1 F/ Y) T; Q#define S41 6
) {: D+ }" O* V! [#define S42 10
! j( E9 x; P9 Z( ~% R% c6 a% e#define S43 15
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#define S44 21
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$ U ^% R% A( q! U- I' [0 m- Jstatic 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));
/ o/ O/ R q$ {: L! f8 X) sstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
, a" M% D, v! T( U( ~; pstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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. o, K6 j% U* }: u4 j" W# d2 s! bstatic 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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5 _$ M% z9 k8 n* D/* F, G, H and I are basic MD5 functions.
*/
, w/ b6 d2 C& N7 S4 \' H; ?! v#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
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#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
+ a1 G+ [* B) G#define H(x, y, z) ((x) ^ (y) ^ (z))
0 E- f: f8 g) [) K4 X( P- T6 r#define I(x, y, z) ((y) ^ ((x) | (~z)))
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/* 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.
; f3 D, x/ i1 W! b6 URotation is separate from addition to prevent recomputation.
*/
/ k, |9 v( u7 e6 v. p#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); \
}
l2 C3 R B% M8 B, _! ^#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;
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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.
*/
5 Q$ X2 L% T$ N; b# C- g) D( t4 f; Vvoid MD5Update (context, input, inputLen)
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MD5_CTX *context; /* context */
% ^' c, V y+ o4 ] X0 f" Z2 Iunsigned 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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