md5加密算法C++程序

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#include "global.h"
#include "md5.h"
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/* Constants for MD5Transform routine.
*/

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#define S11 7
; W5 w; g6 t; I: M#define S12 12
/ v0 E8 y* k P% _# ]/ n#define S13 17
#define S14 22
8 u% M8 }+ s3 L* K& {& T2 G) i#define S21 5
- T. _$ T/ ^9 @#define S22 9
8 P$ M3 q* h0 j* s! q#define S23 14
#define S24 20
#define S31 4
#define S32 11
5 F1 _6 p' F2 }& O#define S33 16
#define S34 23
#define S41 6
#define S42 10
0 t9 ?7 {2 _) Z& T9 G#define S43 15
#define S44 21

/ m! D. G- `1 kstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
& B- p3 Q7 I# N5 Z4 A, G, {+ R( z; ustatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
& z+ Q/ j8 [) m" q; [5 _# M2 jstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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9 h' u" c( ?8 }5 |3 i. `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
};

/* F, G, H and I are basic MD5 functions.
*/
" s9 u9 t3 ?9 Q#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))
6 U. U/ \2 a# @5 F+ J1 e#define I(x, y, z) ((y) ^ ((x) | (~z)))

0 |$ ^$ w8 F* p2 Y% t7 D/* ROTATE_LEFT rotates x left n bits.
*/
' t+ A/ D" P% N#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.
$ A3 m% H. L9 O/ T+ I5 ZRotation is separate from addition to prevent recomputation.
*/
2 | M8 k' x7 O8 J! X& v; n4 d#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
2 ]/ n! e! [# M0 P, M. R/ q5 t#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (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); \
}
#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}

+ j1 o- X+ a# [# _/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
+ L. V' l) W8 ?- wvoid MD5Init (context)
MD5_CTX *context; /* context */
; k# j8 b2 K6 B) D0 T8 z{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
4 C- F) E8 [) v5 r*/
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.
*/
, R/ p) w5 |( U j8 Kvoid MD5Update (context, input, inputLen)
7 U" s7 [# m9 ^# eMD5_CTX *context; /* context */
* Z% q6 a2 m/ e6 {" [) funsigned char *input; /* input block */
+ f* w$ U+ T5 z7 K- n& hunsigned int inputLen; /* length of input block */
+ v3 J& C7 j; i' ~3 T' z9 `{
unsigned int i, index, partLen;

/* 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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