md5加密算法C++程序

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#include "global.h"
#include "md5.h"

7 K% x, D- }% g6 u7 P* d" r" A/* Constants for MD5Transform routine.
*/
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#define S11 7
#define S12 12
#define S13 17
#define S14 22
* P: D6 u/ \. h' I6 L; I' U' G#define S21 5
p3 i2 m+ g3 F) v2 ]9 O) ^#define S22 9
#define S23 14
- ?1 m: S5 H; _7 a7 D5 L#define S24 20
& A6 D' [. O( N/ @( b& R) |#define S31 4
" B& [# _0 @8 W6 B7 s$ P#define S32 11
2 G; j8 R3 Q0 _) U( t) v# H# q }4 D! Q& [#define S33 16
#define S34 23
3 A# c* ?+ I3 K! S3 L, x$ T3 ^#define S41 6
% `0 }) r2 i6 }+ t+ m) c#define S42 10
#define S43 15
5 n* s: a; B6 N" L3 S#define S44 21

* z. D) O) l0 n% ]4 @9 A0 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));
6 t1 i& X# y, A0 L/ z( N, F! mstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
a5 G; M i* a1 u( {. J- estatic 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
8 r- U8 S- n& i9 E};
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3 D: S w! G4 a c/* F, G, H and I are basic MD5 functions.
*/
; u( v* i& Y* V. m" D#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
. [. s9 h5 s8 k: o6 G% o# f#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))
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/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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4 _8 \ _1 v) U1 S: x/* 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); \
}
" y" B8 j ]# R3 y6 u#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); \
}
4 T' }. R5 q N7 R6 R" p, i7 b+ h#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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+ h# @4 X. i3 r1 S0 k/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
5 m G+ Z/ a8 s8 K' x* s( dvoid MD5Init (context)
MD5_CTX *context; /* context */
7 a' i: ]- F: u* C{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
6 Z: e$ b7 T/ K. \+ x3 \ Q*/
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 */
unsigned char *input; /* input block */
\4 a! j' e: w2 e6 i. Qunsigned int inputLen; /* length of input block */
$ D5 Y( V* C- O! W0 C! P D{
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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