md5加密算法C++程序

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#include "global.h"
' ~8 d7 n' ^! Q }, U( i7 b- ~#include "md5.h"
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' G% V- G5 m7 }, U0 {. {, Z/* Constants for MD5Transform routine.
*/
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! b7 O: f0 P8 Y# k3 n& v. v#define S11 7
! v# c2 ~. N2 x0 M3 P# M9 x#define S12 12
#define S13 17
$ j9 P7 f9 V+ j# {6 R#define S14 22
7 P- {- k8 m1 `6 H#define S21 5
#define S22 9
1 y+ f; b+ `0 K3 t#define S23 14
% ~' C4 d& I+ a! z. D1 j# m6 X#define S24 20
6 {4 z- t* a0 P# ~2 u, w( C#define S31 4
#define S32 11
#define S33 16
3 \# z, P, `" R% q#define S34 23
. e3 Z# p! d- R9 I6 o#define S41 6
! Y1 |! E$ M. b9 e7 ^2 e& h#define S42 10
/ Z( Q% t; S$ O9 h#define S43 15
C# T" ]( n# G% A9 n: _: ?: Z#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
9 L, r8 S" N; L, astatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static 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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( ]! K; N; K2 D2 v8 S0 v' w9 Zstatic 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)))
! w: o7 K# |2 h" x#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
8 x' `* q1 Q2 E+ ?: l#define H(x, y, z) ((x) ^ (y) ^ (z))
% O0 z4 p2 d; p$ l* B#define I(x, y, z) ((y) ^ ((x) | (~z)))

7 b! a& `" ^- }/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
" E$ V/ r. c4 i" j+ T#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); \
}
% ~9 h! G8 D- 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); \
}
& b4 g# g8 { Y#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.
*/
( ^ A* y% u, y; M/ X1 jvoid MD5Init (context)
MD5_CTX *context; /* context */
# M: D$ c5 N) z4 ~{
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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/* 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 */
8 W& J+ A0 i4 W: k' |unsigned char *input; /* input block */
unsigned 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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