md5加密算法C++程序

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#include "global.h"
# q' N% d/ O+ U2 e7 q) D8 c#include "md5.h"

3 M b, U, i& {7 b% I/* Constants for MD5Transform routine.
*/
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#define S11 7
& r' f! g% Z7 m' r( \#define S12 12
#define S13 17
#define S14 22
#define S21 5
#define S22 9
#define S23 14
#define S24 20
#define S31 4
#define S32 11
#define S33 16
#define S34 23
#define S41 6
- _: e+ I5 ~( |#define S42 10
#define S43 15
' f. G/ {) c$ e# ]8 q#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
1 P5 n+ x" I; g% l+ |static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
' u/ P, r4 O/ R6 @static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
* }2 ] @$ k, v7 k5 V3 B# Bstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

1 ^9 Y; j$ P/ ]' O2 M% s+ {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& j" m. W};

/* F, G, H and I are basic MD5 functions.
*/
5 f. f% v! c3 W" n' D' S#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
1 E8 D3 c) d& Q, g, [) Q#define H(x, y, z) ((x) ^ (y) ^ (z))
6 n W; C; o! i% m' k, {" {, ~! \#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* ROTATE_LEFT rotates x left n bits.
*/
#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.
Rotation is separate from addition to prevent recomputation.
*/
5 d) @; Y, S7 @% M#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
" h% T0 O9 K4 Q9 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); \
}
- B) Z( D( [ J. b# o" u& K#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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9 D2 V7 G% R1 g/ ~/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
2 [$ d1 u6 m0 ?% n4 R- b. m* Uvoid MD5Init (context)
MD5_CTX *context; /* context */
{
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.
*/
( n, |; y- _/ c9 Pvoid MD5Update (context, input, inputLen)
: z( F4 D3 k2 _% YMD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
{
unsigned int i, index, partLen;

/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
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/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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