md5加密算法C++程序

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#include "global.h"
: M% v. E- D: |2 U1 o5 f#include "md5.h"

' h2 T$ N% e" k+ U' H& [- P0 U# l3 H/* Constants for MD5Transform routine.
*/


#define S11 7
& E- p6 T' k: m. g$ _#define S12 12
0 S% [- S5 `# r V; M. e, _#define S13 17
. U: P k9 J7 f/ b#define S14 22
; O- V# S" Z3 W3 O! o- L#define S21 5
. F. \8 y0 g8 }8 \7 b5 c#define S22 9
#define S23 14
" U4 ]8 ?% R9 K) O! Z+ l#define S24 20
) \' @) t# s# D) ^) M#define S31 4
+ t) h. q( C% o" I( P. X, X* J#define S32 11
. p* F" v7 c8 `$ W: C! U7 F#define S33 16
#define S34 23
#define S41 6
; ~( U+ }' A' t$ `) _#define S42 10
#define S43 15
#define S44 21

static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
6 z, ~, t2 @+ }static 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));

! B; V, y: B& k- R& U- Ostatic 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
5 V8 X" k3 Y* s- |};

4 W; E0 M1 \7 l+ d- ?% f5 k/* F, G, H and I are basic MD5 functions.
*/
9 {# X9 v' t3 _, K#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
3 N+ {( n" y; a#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
' R9 Z4 P& W: s0 {. A8 y3 x C& z#define H(x, y, z) ((x) ^ (y) ^ (z))
/ n' x' f8 g0 ?/ Y7 O' w#define I(x, y, z) ((y) ^ ((x) | (~z)))
% L* D# R3 W! i, m5 f. \
( |! g8 d1 ~* ~$ E" e9 w/* ROTATE_LEFT rotates x left n bits.
*/
2 R y2 V) C& I2 @#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
+ \6 J' y5 A' L* C p2 t; M
/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation 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); \
}
, g/ q( T/ H1 f* G+ N#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.
*/
) ~& q/ f* w- _7 J1 pvoid MD5Init (context)
MD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
1 I5 Y( o3 X4 `*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}

+ T2 e1 w d5 H3 c7 L' `$ K6 p/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
4 ~! x% R: \4 s- Q6 b! U& r( E5 wvoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
{
unsigned int i, index, partLen;
0 |! l6 O! a# c3 N& G J: p
/* 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))
&

guoyun786

7 [$ a( _5 m/ {1 ]. ? y/ O