md5加密算法C++程序

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#include "global.h"
: F! j. p- v& u+ C5 q#include "md5.h"

, B3 ~9 s% N$ |+ y/* Constants for MD5Transform routine.
*/
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#define S11 7
8 W, j. ]) \3 r#define S12 12
#define S13 17
#define S14 22
& S9 A y; _5 ^3 y* H- J( x& Q#define S21 5
* v" k. [& m* S- r#define S22 9
#define S23 14
#define S24 20
#define S31 4
# _( w8 g; ^' }% c#define S32 11
#define S33 16
" [! Q: |& ?' X+ s! k#define S34 23
#define S41 6
# _" g# B& p+ W; M#define S42 10
% A0 G% C+ l. H. h- O Q#define S43 15
5 r: j4 N& \* G0 m4 ^6 B#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
8 I5 K: D# w! S2 { _static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
7 x6 \; Z9 z& V; xstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

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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5 u4 g' f* f& i; N1 A/* F, G, H and I are basic MD5 functions.
*/
9 Y; C5 W7 q- q) f. _% Z#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))
2 E5 O/ e v( M1 j) _3 d$ E$ e. \7 T#define I(x, y, z) ((y) ^ ((x) | (~z)))
s3 M, X4 f. N! k8 G
6 T- R; b8 T. L. W, v6 I/* ROTATE_LEFT rotates x left n bits.
*/
" X! Y1 K q$ i9 X#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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( n/ [8 ]# B8 L! I/ i/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
* x+ ^- V( V, {% U( y: k- eRotation is separate from addition to prevent recomputation.
*/
+ g Y7 t4 Y. v: f- u2 |#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
+ u, \ P) F' [#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 ^9 q/ f6 g#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)
. p" R( A3 S0 p. Z& ^MD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
' t; _% {' q# ?, p1 D- }) ]*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}
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" l: G6 h, ^$ x+ S/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
3 l7 W0 q# ~1 S! H1 Z$ S' Z- fvoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
- R3 U( i2 M$ n4 p! w& N' vunsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
{
unsigned int i, index, partLen;
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/* 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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