md5加密算法C++程序

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#include "global.h"
#include "md5.h"

1 t5 O! V$ W+ Y/* Constants for MD5Transform routine.
*/


#define S11 7
; s1 W0 K% d' q+ | y#define S12 12
#define S13 17
5 F8 V% S1 b6 T; r, \#define S14 22
7 n0 z& W- D4 }! N% f& m6 [# h#define S21 5
* D! X* G3 v/ ]8 ^#define S22 9
3 R) a# F0 ~; }$ W#define S23 14
#define S24 20
#define S31 4
3 d2 _1 H- r: P$ |#define S32 11
0 G1 v" ~4 p# O#define S33 16
7 e) |: L) N G* l5 l7 j#define S34 23
# C* z+ z- l- g8 w4 ?' d#define S41 6
#define S42 10
7 T$ |! \4 y6 m' w#define S43 15
#define S44 21

$ w# L6 s+ b. V/ N( Ystatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
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));
" V/ D* d( a5 z4 h; s+ estatic 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.
*/
" ~6 C% |: z: B6 w# a" Z- n+ c#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
, c5 m4 p+ B! i! Z#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
% s; r. Q6 i! p6 ?, ?# R#define I(x, y, z) ((y) ^ ((x) | (~z)))

0 `( ]- _& u O8 i4 C8 b v& y/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
# m" @6 s3 e# P w' g
2 S1 ~* V' Q( B, q& X8 T& `6 o/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
! `0 _- r+ t6 }4 w) @#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); \
}
, p+ P# M0 ^0 b( r) ]& J, O4 O6 F; 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); \
}
#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
: j" f, o9 B8 M
" [( d' k* e4 x8 O8 \( M$ ]2 N7 y/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
9 e* f3 q7 a0 e( hMD5_CTX *context; /* context */
{
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;
}

/* 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 */
/ z$ U$ S6 N( s6 B% @unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
) n: @7 j% \* d: F) p" y8 U8 M{
unsigned int i, index, partLen;

/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
: n- l* K. k- D; Z8 y$ m2 K8 S' R
/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

guoyun786

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