md5加密算法C++程序

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

/* Constants for MD5Transform routine.
*/
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#define S11 7
~" O: B W( Q#define S12 12
; x' B0 \4 \9 s/ l! }#define S13 17
3 s# W9 s$ D# z9 D#define S14 22
#define S21 5
' T& o) u8 r5 q. _, d#define S22 9
2 a) M6 m" M" T- }#define S23 14
- w3 r3 i+ I+ v8 l" @2 o# l8 Q; K- Q+ M, [#define S24 20
( `* [, g3 o$ h1 V' r4 o$ ~#define S31 4
' k6 p$ t+ r( f F7 @#define S32 11
#define S33 16
#define S34 23
- p/ e) g" v# Y/ O' J#define S41 6
7 S% I2 Z. m2 w& s#define S42 10
" @3 C, i8 k( K9 u% e6 i$ z0 x#define S43 15
#define S44 21

0 k: v6 {: n9 x2 a1 a" N+ Jstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
: S" S* O7 [- Y8 o: [static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
3 p: n$ i ?5 |static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
( t0 Y( J, Z) ?) D4 G Z( w! Istatic 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
, [+ h+ u) {+ A, h; z};
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/* F, G, H and I are basic MD5 functions.
*/
0 ?9 U( Q( I m |3 v4 z! p5 c3 x& L$ v#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
2 N0 D+ e8 K: x Q( p4 j#define H(x, y, z) ((x) ^ (y) ^ (z))
/ e2 n: M2 G7 P2 x1 K" R. }#define I(x, y, z) ((y) ^ ((x) | (~z)))
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; n3 n. Q6 ]. W# U% E( i/* ROTATE_LEFT rotates x left n bits.
*/
) z( [1 g$ Y. c1 {0 i! K8 k#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

: \6 d+ U) v% i8 O" O/* 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); \
}
8 s7 J- T* u2 ]/ h5 I% w#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
2 k* F6 V; w2 v1 U9 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); \
}

/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
MD5_CTX *context; /* context */
2 j; v1 u8 T: y- @{
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;
}

/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
# Y. F; T. L* H8 ~1 a# I+ ?9 |void MD5Update (context, input, inputLen)
4 r; Z0 w: T* c! E+ K# B! L8 ?0 t: ^! eMD5_CTX *context; /* context */
# Z5 `0 S5 ]/ S7 g8 U& Dunsigned char *input; /* input block */
" a f h% p+ s5 j( Bunsigned int inputLen; /* length of input block */
{
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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