md5加密算法C++程序

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#include "global.h"
* B+ s! B2 J0 a- a9 X' r#include "md5.h"
* L- u1 f2 B* Q% j3 b" a5 ]; E
/* Constants for MD5Transform routine.
*/
3 c$ ~3 i0 Y. V

#define S11 7
# {1 ?8 |- z+ Y {! x#define S12 12
#define S13 17
5 e# A# g3 B) o$ Q, s4 R3 f#define S14 22
#define S21 5
#define S22 9
3 q+ W9 t ~7 F! d. t: |#define S23 14
" B6 z7 @+ b) c Y: b#define S24 20
#define S31 4
/ R" T, c) u7 w8 i1 Q#define S32 11
#define S33 16
#define S34 23
7 z7 U$ g: k, z" p# A5 k4 @#define S41 6
; E: j! A) Y4 A7 h1 p#define S42 10
- p2 }6 o& b& z3 a#define S43 15
#define S44 21

3 {: u2 q) M' L2 _static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
0 c& J+ H5 X/ Ustatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

6 x4 g, r8 F1 p3 g1 P+ ]7 qstatic 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
};

2 O1 I* M1 W0 T' J/* F, G, H and I are basic MD5 functions.
*/
8 i/ P& _- R; M: t( R7 k#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
( m; b6 P9 k3 P t( _#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))
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4 D0 N* d3 N% e. p/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
" G! Q4 h& z/ k* _: m9 g1 q; iRotation 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); \
}
" x" G' `( g# x% ~9 Z#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); \
}
& i* P, A7 e: ~" f
3 e9 @1 }2 ]9 B/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
( m3 I) P) F! lvoid MD5Init (context)
* Y1 o7 F7 z, t3 H7 rMD5_CTX *context; /* context */
: f8 b9 `, _) h" d8 [{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
9 \( {( g+ R7 G& L c2 c*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}

/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
' n$ ~" [! J8 p8 i- nunsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
; u7 ], T" Q2 v- K{
unsigned int i, index, partLen;
9 T1 n" S+ T8 s
/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
- {# R; d6 e0 n' A/ Q! W
/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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