md5加密算法C++程序

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#include "global.h"
! F7 i2 m; r, y) D#include "md5.h"

/* Constants for MD5Transform routine.
*/
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3 ?( v6 x% L) |- V& x1 r" l0 W#define S11 7
6 U/ Z9 t6 u3 d2 o, w+ V7 k$ ]#define S12 12
#define S13 17
#define S14 22
9 l0 t1 h9 I* h. l; H: ?% r#define S21 5
) U) ]3 _" e) g#define S22 9
. p5 H2 x- m7 Y s% Q) u# R#define S23 14
' u5 ^ N: B U$ r H#define S24 20
) D8 Z6 Y9 c' n+ I% f. o#define S31 4
#define S32 11
#define S33 16
* t6 a0 ~! v: d: z: F#define S34 23
#define S41 6
) b( @3 X6 m! D2 x$ p#define S42 10
! e+ Z4 C4 o) T$ Y4 ]" v, Y#define S43 15
#define S44 21

4 H5 H9 z% j* t9 x$ `# X; @* f7 b9 f/ l' Nstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
6 N7 |, ~ |- U; R- P# w9 c sstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
8 d& m1 u) N* z( H* p. z8 pstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
1 C8 \& `+ _8 r. [" r6 F7 [static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
C! z: m6 y8 z, u( {8 Q3 N
8 L% [# [) Y5 a/ j4 S: L% Vstatic 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
# H% A8 Y' J- d};
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/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
3 i/ G+ [7 p% U$ N9 S3 O( z#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
5 s8 p3 d- F8 Z {#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))
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7 n2 s1 V7 f3 j# P2 J/* ROTATE_LEFT rotates x left n bits.
*/
! T: d' s \7 ]% l#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.
*/
#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); \
}
/ o4 d5 e' G) n3 B( K6 l#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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3 t. N/ Z( f& K& J/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
5 q, J- K. j# s- X$ ^. xMD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
, S3 m. b+ g' r' n5 Y ^0 z# L*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}

1 [( o& G7 L5 @+ O0 q/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
+ ~' N$ |" k2 t0 \+ S9 EMD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
: A( _! I8 b' p' m! w* j6 R{
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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