md5加密算法C++程序

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#include "global.h"
& N( j. E2 s+ I7 B/ G' u#include "md5.h"
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0 T# U Y8 {+ a. R% A2 ^- P* D3 z/* Constants for MD5Transform routine.
*/
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+ C3 t+ S! e+ q#define S11 7
#define S12 12
#define S13 17
$ P* k! Q& \: N7 G( v- m#define S14 22
! r3 j$ z* q0 s( \) i% }2 j2 l#define S21 5
) ^9 G& P" L; p& Z#define S22 9
#define S23 14
$ i3 ?7 ~$ p9 j#define S24 20
#define S31 4
1 B1 q1 E8 f8 ?+ V- z#define S32 11
. h" Y8 d, T1 [! s; Q* M- o) C z#define S33 16
A, t" g' u' V! [2 G0 Q2 e#define S34 23
#define S41 6
7 q1 Y a: e% a- o5 k#define S42 10
) s- ~1 q: {* x( _* o0 o6 A#define S43 15
#define S44 21
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9 O. z3 m! G/ z. d9 A/ nstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
1 {- v! q1 z8 N! q! bstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
2 k! T, T# ^, S- P$ ?. _4 ]9 Wstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
1 @) V( j2 g+ C* T. F; Xstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

! k9 a: d3 |* e- V* ~1 h3 ~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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, u1 u# y+ g; L0 M/* 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)))
( r9 ~& p5 O, L& A& n#define H(x, y, z) ((x) ^ (y) ^ (z))
7 F/ g1 ]! O! D) l#define I(x, y, z) ((y) ^ ((x) | (~z)))
# j& C/ I8 O* [. {
' G& X6 G: O: y% \! E( [/* 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.
Rotation is separate from addition to prevent recomputation.
*/
8 A% U0 f9 r% n$ ~* b! I' D#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
3 v1 D$ g/ I6 M, A#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); \
}
4 _5 h' V' g% Y& 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); \
}

/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
" T0 y( r; G0 Nvoid MD5Init (context)
MD5_CTX *context; /* context */
8 E( p4 N, O7 d2 I- w{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
0 g# j" }7 @; I*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}
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" H( a* T) \- L6 P) Q/* 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 */
* D- d) s3 ^$ m& Aunsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
5 F: Q; ]8 D7 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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