md5加密算法C++程序

乐乐天

#include "global.h"
& {+ w. @$ |. h0 G5 C! J" N4 J#include "md5.h"
& H7 |1 m9 g$ ^% B" ?
! E) r& M* M3 `/* Constants for MD5Transform routine.
*/


- ]5 }% e6 U! O. u1 E#define S11 7
#define S12 12
0 _3 U1 L1 y. I$ A( W#define S13 17
5 f4 \2 k) [+ `/ O u#define S14 22
1 A2 P7 a9 d5 q8 e# d#define S21 5
#define S22 9
#define S23 14
#define S24 20
#define S31 4
#define S32 11
#define S33 16
#define S34 23
#define S41 6
9 Z+ H( }) g5 j5 m#define S42 10
% F1 ]3 G' E! `0 ]#define S43 15
6 }" f" l' g( x1 I: p2 s* s#define S44 21
. {1 G" K c" J S/ T2 l
static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
) X5 u! \% Y1 g7 r) D/ x Zstatic 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));

* |7 F' ]! o6 V$ `/ g' V" Fstatic 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
};

& d0 D& @9 a4 ]) n+ A9 r/* F, G, H and I are basic MD5 functions.
*/
) O$ @* m, {% `4 O9 ~0 g- P; `& j#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
3 F, p6 q! V$ o# v& ^#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
o6 D; H' X8 M#define I(x, y, z) ((y) ^ ((x) | (~z)))
' a. {4 M& ?, n9 y9 w
/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

2 Y! _: K0 P# {: z9 U7 D% N/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
3 W% e4 Q& }8 D; U: U2 `) y4 |Rotation is separate from addition to prevent recomputation.
*/
$ X7 v4 P7 c! ^& A% k @- g#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); \
}
9 {+ S, G! Q# F' o) r#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); \
}

2 h$ R) Q& d) G7 `# W3 }, s/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
! n9 N: B z! C( s! q: B6 WMD5_CTX *context; /* context */
. ^1 r r# o; x" g{
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;
. L z: A: T; c' i}

/* 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 */
- k- U/ d0 P) P! Z% T: ]: O# U/ kunsigned char *input; /* input block */
$ q4 p4 R& ^5 p" ?unsigned int inputLen; /* length of input block */
. ~4 f, j! Z; m$ |{
unsigned int i, index, partLen;
1 {& q- K& X4 h- p, `0 w% H
/* 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

: n# o6 ~9 V/ z2 j* K- a+ L2 ]