md5加密算法C++程序

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#include "global.h"
, }: L: B: z& x#include "md5.h"
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8 K0 y; s) Z$ z( x3 x, X/* Constants for MD5Transform routine.
*/
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! j% b1 n& r5 _( {- T* v, y+ v#define S11 7
- B6 I0 G, t4 G5 G, ^; K( H1 B* R#define S12 12
, Z, }6 S% ?' U9 v#define S13 17
$ r% }2 R+ z" w3 k0 i#define S14 22
- G4 J" d, W! F4 L* s#define S21 5
. f! V4 m ]' {- x2 O8 j#define S22 9
( E9 h Y3 H5 d2 Z4 b( C6 r#define S23 14
#define S24 20
0 F9 K8 }4 M. F; b#define S31 4
, q( L0 C) L- ^+ v9 D7 l% a5 y#define S32 11
1 ]& \/ b& R! v9 d7 i#define S33 16
#define S34 23
#define S41 6
#define S42 10
! w; V$ A3 t3 E* l& K#define S43 15
#define S44 21
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static 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));
" r1 U7 g& D/ Gstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

- G L# { }1 `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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2 ^- E) ?, o3 D' [3 O5 x* [5 D/* F, G, H and I are basic MD5 functions.
*/
! m+ B; q8 N9 ?9 D5 t#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
4 P- d/ E9 z' }" o! P7 k#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
" R' l& `* h, q2 w#define H(x, y, z) ((x) ^ (y) ^ (z))
. c1 Y( q% k; q' C#define I(x, y, z) ((y) ^ ((x) | (~z)))
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: A9 K2 d9 q9 D- v/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

# u( Q( \: z. L7 h/* 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); \
}
$ J1 |' c. l5 u' Y#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#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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: T& J2 F/ Q v0 o7 c( o2 V/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
MD5_CTX *context; /* context */
" k, h; `& A- H2 O$ X$ l{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
E f4 [! B5 X! p" _*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
1 W1 s8 T0 H: V& t2 I' V! P}

1 R2 W9 R4 l4 \/ \/* 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 */
& m0 p0 H' j& |+ ?, k, Y; funsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
! V$ G3 I) K0 D/ j! T5 T{
unsigned int i, index, partLen;
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/* 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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