md5加密算法C++程序

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#include "global.h"
#include "md5.h"
* I, @$ o x' @
5 e* t- R3 i& R" ], _ k4 g/* Constants for MD5Transform routine.
*/

% Q8 `: R, n2 Y0 z
#define S11 7
#define S12 12
4 U& ^, n. d# n- y2 g#define S13 17
#define S14 22
% ^. ^8 ]. i; v#define S21 5
& `! W7 a [; }* R/ V' C; O#define S22 9
#define S23 14
#define S24 20
& ?/ X! ~: K1 R. w( R' a6 }#define S31 4
#define S32 11
: J. w+ p5 M0 s5 f, a" q#define S33 16
#define S34 23
3 ~" |* C7 O' {0 c- S/ l9 F6 j+ l$ x#define S41 6
#define S42 10
$ m/ v+ g8 ?0 \% H#define S43 15
/ {' R# |4 D7 W2 W2 {/ [1 b#define S44 21

static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
6 \1 ?; `9 K nstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
' Z" Q: q* J, b* s/ A% Z8 Vstatic 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));

4 h9 O! q2 E* h7 p3 Q! w v$ L' Ustatic 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
};
1 S- l$ P+ U# Y/ Y- ~/ `/ p
$ p; ?) P2 J$ `' s2 g+ E# W7 N/* F, G, H and I are basic MD5 functions.
*/
* D: M7 V* L3 v0 L1 ~0 I#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
$ i+ q3 S( x0 C) u( X#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
, _% N5 L( ^, S2 J$ Z0 ]#define H(x, y, z) ((x) ^ (y) ^ (z))
; P5 V: P E. N J' U. D% e#define I(x, y, z) ((y) ^ ((x) | (~z)))
! N3 A8 A% j0 |% U
/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

- l" S( z. B2 [4 y% V/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
9 K& ]3 }' K' e( JRotation 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); \
}
# R- r: n: t2 n' | n! x6 y#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); \
}

/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
; c n1 X- C6 G# bvoid MD5Init (context)
5 U' h( Z) z; V) QMD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
. L8 [0 Q2 s2 s*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}

! E& F: h- f1 a0 D) k( R2 y/* 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$ Y1 l* C" f, [' `" r( v6 P9 cunsigned char *input; /* input block */
2 C( R6 `! k4 H6 p- l5 sunsigned int inputLen; /* length of input block */
5 W6 @9 y ?7 ]9 r: B* w{
unsigned int i, index, partLen;

/* 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

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