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
#define S12 12
7 d0 s3 E3 X2 w8 F- {+ { `7 `#define S13 17
#define S14 22
1 M4 I) y* ^( \1 i/ F#define S21 5
s% D" f* Q2 D( ^# Y F#define S22 9
3 a3 Y& `2 U3 k, M6 `1 P#define S23 14
% m' D$ D+ g5 }- k. C6 t#define S24 20
0 k' [6 v$ v) D#define S31 4
#define S32 11
#define S33 16
#define S34 23
#define S41 6
7 S8 p. d; {2 Y( R/ G! y; q#define S42 10
#define S43 15
#define S44 21
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* H$ t5 F& L8 F0 |9 u- ^5 jstatic 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));
9 Z! G- K, u+ e6 R* zstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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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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/* F, G, H and I are basic MD5 functions.
*/
/ |) f3 U$ M7 X! F#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
* f1 {2 A* O1 H2 b1 I0 N#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)))

/* ROTATE_LEFT rotates x left n bits.
*/
# {" [5 K1 |# a- L$ y#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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( C. w- q4 e5 @* w! F/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
& b% s t: d& m/ e#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); \
}
#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
2 b4 q4 y0 ]2 L% j, f6 J8 i9 c#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.
*/
* K" i1 d4 J% uvoid MD5Init (context)
MD5_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;
}
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/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
' M& r5 o6 T; ?! ~ Q' I. N6 Nvoid MD5Update (context, input, inputLen)
5 D$ Y3 U; ^0 JMD5_CTX *context; /* context */
6 c7 a4 B' ^ o* Ounsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
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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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