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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0 ?/ `' m* X- p#define S11 7
: r- S5 A2 Z: v* q#define S12 12
#define S13 17
#define S14 22
#define S21 5
#define S22 9
4 X& T& M. z1 I q/ [, q# c# k#define S23 14
& W* D1 ?8 k" }6 D#define S24 20
#define S31 4
#define S32 11
#define S33 16
#define S34 23
#define S41 6
#define S42 10
+ C2 d2 A* z5 n& R# D7 W8 a#define S43 15
#define S44 21

: \& q2 V; Q3 r. sstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
{3 Y: W4 h4 u% ~+ kstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
/ m5 F/ C1 d/ {static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
w6 T+ [4 y+ a- Tstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
d4 x/ }' B' W4 O2 I. E$ n& M2 Nstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

5 g8 ?4 l# P7 O6 e" T+ istatic 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.
*/
#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))
#define I(x, y, z) ((y) ^ ((x) | (~z)))
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& H8 ^# L: n: t, u/* ROTATE_LEFT rotates x left n bits.
*/
- @5 X( i: x7 i" E#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation 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); \
}
n) D8 @- v9 H6 h1 v# G, s#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); \
}
" H4 A' ]9 \6 m) m8 P#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.
*/
void MD5Init (context)
: \, e$ v: x6 y: y. P) FMD5_CTX *context; /* context */
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context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
0 P0 g4 S- r" G0 L, ^ y) \& j*/
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.
*/
void MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
- D8 v- [( P$ b* iunsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
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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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