md5加密算法C++程序

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#include "global.h"
# u, w0 }0 V! p3 a#include "md5.h"
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/* Constants for MD5Transform routine.
*/


I; M2 t7 G7 `7 V6 T* f3 S+ g#define S11 7
2 K. w( ~0 Q9 C' b2 G( o4 \* @#define S12 12
3 z: z, f+ s, h( f#define S13 17
#define S14 22
. u$ Y2 i3 C1 f4 ?, K#define S21 5
#define S22 9
o1 I% b# Q" J#define S23 14
8 N& f6 ?6 |/ p2 j" n2 {#define S24 20
#define S31 4
4 n3 h& A8 {5 A8 z) @#define S32 11
9 Q3 Y% o+ l9 e+ a' p#define S33 16
/ _! C4 e! U4 A- j$ Q( J#define S34 23
- z3 h9 D3 {5 ~#define S41 6
#define S42 10
#define S43 15
#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
* i4 D/ T& w; ]1 x$ A: x8 `' Cstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
7 j& c# J3 R$ r# G6 {, i+ s& Ystatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
" ~1 B- H% o& w0 bstatic 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)))
) }( H, i3 q0 m6 H# L4 Q" O#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
8 h8 v1 s5 Z+ o! M! f3 G#define I(x, y, z) ((y) ^ ((x) | (~z)))
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/* ROTATE_LEFT rotates x left n bits.
*/
% o9 m: Z- v% U: X#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.
*/
3 {# _; C2 I4 F, h6 B: [: c& p' q#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); \
}
( v1 }( m; w. d#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 N! b: A+ Q! n' i1 \" X! M#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}

) F! w1 d& T4 S3 m- w/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
3 l4 R2 q" ~+ T& P- @2 |3 Kvoid MD5Init (context)
' R" L1 c! w2 ]+ G8 jMD5_CTX *context; /* context */
% n- W/ O' ~# x4 |! }: f{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
3 g; y% N1 t9 N: c*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
3 w2 J9 z5 l+ _$ M) ?}

* B+ X7 z% M5 s$ P1 U/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
* O* _$ u2 b; o) q: X. qMD5_CTX *context; /* context */
( a" c! ]% [, |6 k5 u# t* ?unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
{
unsigned int i, index, partLen;

/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
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/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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