md5加密算法C++程序

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#include "global.h"
9 z% {% a: b: k9 v$ I* U4 A( Z0 ^#include "md5.h"
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- }7 j: ^, h' g5 G* y! ]/* Constants for MD5Transform routine.
*/
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' `9 l4 F, {* {+ }) H2 i#define S11 7
R8 z# N% r! E! l0 _+ I+ T0 H8 C#define S12 12
. L2 b9 {. {& a* z) R% R#define S13 17
9 y6 T7 r4 Q2 r' r1 x8 l) y#define S14 22
#define S21 5
#define S22 9
- T- [1 `3 o8 g, u! M. m. i7 ~& o#define S23 14
#define S24 20
#define S31 4
a! q5 O' I' n4 b" A#define S32 11
# A5 V5 x7 n; L4 C, |- k- W#define S33 16
#define S34 23
2 O: y' P# R) Q9 G! j; q4 v#define S41 6
#define S42 10
8 A1 I5 |( ]. T/ H; H( J( ?: Z#define S43 15
8 ^. s5 @+ L9 |6 |#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));
2 m! G; A1 C) q* T; t" ostatic 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));

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)))
8 v& b5 p/ t* H- g. B$ i9 Z#define H(x, y, z) ((x) ^ (y) ^ (z))
; ^2 q3 `6 k: F: D! z# v$ N#define I(x, y, z) ((y) ^ ((x) | (~z)))

! q; j( a% I" P- p+ O9 `& r/* ROTATE_LEFT rotates x left n bits.
*/
#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.
6 f$ A1 C5 [, CRotation 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); \
}
#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.
*/
void MD5Init (context)
MD5_CTX *context; /* context */
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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;
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; [ Q; W9 L/ ?/ E# K; u7 ~/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
( |# ^% |! d/ S. v/ ovoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
5 T* N* s8 X2 m# _8 z( `unsigned char *input; /* input block */
+ W8 D+ R% \) _4 l3 Kunsigned 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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