md5加密算法C++程序

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#include "global.h"
#include "md5.h"

/* Constants for MD5Transform routine.
*/

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# ]. N3 Q, \9 F' Z8 m3 e#define S11 7
- h4 B: Z! h, a ~#define S12 12
2 x: b3 c5 A* B7 u6 f#define S13 17
6 X$ T, |7 H- J+ Q/ t#define S14 22
#define S21 5
. T& w/ ^( }& ]2 l1 m) N4 @1 }0 n#define S22 9
7 F0 @3 V5 v0 [5 m% k#define S23 14
#define S24 20
#define S31 4
#define S32 11
; b; {) [" l+ a& S#define S33 16
4 W7 {( d& D. k7 M7 d0 R#define S34 23
#define S41 6
#define S42 10
% W; @8 N; X8 [+ Y; f, D#define S43 15
#define S44 21

0 K* [! B: c" s p1 O% ~. `' rstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
: F9 n U6 x! @5 l/ ^' _( S# S, bstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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$ Y4 i( X3 W6 b7 Z& Lstatic 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
/ T: \* c7 k6 Q/ t; m( a% z};

+ b$ c3 \& |+ [* y* |4 O. K/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

; m( U0 ]& ^. R/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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$ A; ?4 a' X1 }* M8 h& D# W$ A/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
. ]& L1 i, u$ X# b0 ERotation is separate from addition to prevent recomputation.
*/
#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
) G# R# o; {1 B# M; k$ U) ~#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
6 f! Z4 r6 {" m! u& J- _" A# S#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
6 q+ b- B" L& m+ v# o#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}

/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
; M7 \- @5 p6 sMD5_CTX *context; /* context */
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context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
* }/ v2 |( d5 d( D}
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/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
Q5 G) b6 z! }+ K9 ivoid MD5Update (context, input, inputLen)
) D. [/ I/ j2 SMD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
, K; C8 E, Y+ a' |& k{
unsigned int i, index, partLen;
1 f( O @5 F% y: A- }: h
/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);

/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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