md5加密算法C++程序

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#include "global.h"
8 y- ^7 g5 c# e$ t% Z7 X; [* Q#include "md5.h"
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/* Constants for MD5Transform routine.
*/
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7 }1 {; `: X: {# s; k#define S11 7
6 g3 O6 F& i+ _- N- ]- I6 q#define S12 12
#define S13 17
/ z8 v) k- S+ p6 R4 u8 r#define S14 22
3 x. T" N2 g. B+ e#define S21 5
3 f5 H; y: k, u#define S22 9
#define S23 14
#define S24 20
#define S31 4
$ d! X+ Z; f4 U1 [#define S32 11
#define S33 16
& m' r( |7 g; a8 R#define S34 23
" j) S0 D( b% \7 B#define S41 6
#define S42 10
#define S43 15
& r2 B! A `# F7 u/ ?/ `: [#define S44 21

7 T$ ~, C3 r, r1 R$ `% astatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
% ]( a) `4 ?& N. b* kstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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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
};

/* 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)))
. ]/ Q" G2 k5 ~9 @ O$ J#define H(x, y, z) ((x) ^ (y) ^ (z))
/ S! }- d/ v; r" E1 s#define I(x, y, z) ((y) ^ ((x) | (~z)))
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J% o2 J) U% M4 G. ]- l/* ROTATE_LEFT rotates x left n bits.
*/
9 _+ C4 S/ v' h! n2 R* h#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.
8 w9 @8 d' T% j* u$ m; yRotation 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); \
}
5 |( c; n. ^+ g3 O#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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/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
/ ~8 E' L9 W) t# q. Vvoid MD5Init (context)
9 m$ D) u& C) i6 {: dMD5_CTX *context; /* context */
{
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;
. B( B/ C8 N9 d/ N! I}

8 V0 _, A( S, j/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
6 h2 @0 M# X3 {; W4 X+ qvoid MD5Update (context, input, inputLen)
0 k3 X0 h9 w+ J* A: u! h. [MD5_CTX *context; /* context */
0 y5 \. y: U" [6 [9 c% ]9 Dunsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
d u- h; D5 u{
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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