md5加密算法C++程序

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#include "global.h"
6 \% k& K3 | H+ t1 }. E& s#include "md5.h"
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/* Constants for MD5Transform routine.
*/


# Z2 o* d3 C8 m; [7 o/ e. n: E#define S11 7
( A* A* w5 e/ m# F% |0 e; o+ r% y#define S12 12
#define S13 17
7 Q+ ~0 O! e, `0 b#define S14 22
* M) g. v' [4 y( U2 N" Z4 s#define S21 5
. X5 K. y' k" p) z$ V4 h8 m1 I% c# x#define S22 9
#define S23 14
#define S24 20
#define S31 4
. r' t" a6 Z- M/ a! X, c8 R) v#define S32 11
#define S33 16
#define S34 23
#define S41 6
#define S42 10
#define S43 15
#define S44 21

) C) s, D% D, {( e- a* H+ F! y5 X2 a' gstatic 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));
: @ c. q% \4 d: w8 ustatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
( v* w& e9 U; t# Kstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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1 h' E/ ~/ u8 q, h' S/ Hstatic 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
7 h& k) W- N/ J* a};
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* n/ F% v) o/ S3 @3 g/* F, G, H and I are basic MD5 functions.
*/
! _+ l! l9 P! |1 ^$ ~#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
6 A+ D6 ?# L. W- P#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
! o1 e4 T; z* J2 y#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
5 N% C2 | f+ fRotation 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); \
}
; o' W1 I/ j$ f, k9 }#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); \
}
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/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
: e: I7 G5 b8 Vvoid MD5Init (context)
MD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
" _, I4 P7 s8 |6 \. T) j2 X3 y1 n7 d U*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
$ W$ U% v( g% [ l}

/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
. G+ J( c. I* e, g6 | u( Bvoid MD5Update (context, input, inputLen)
& m' l2 z: @' J, H, XMD5_CTX *context; /* context */
, L! v( ^8 K x- sunsigned char *input; /* input block */
" `2 d2 f) B, Q8 X9 `1 @: lunsigned 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);
5 U' v7 {8 N8 B' z$ Q
/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

guoyun786

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