md5加密算法C++程序

乐乐天

#include "global.h"
0 |! s [0 p. C. G/ r- ^! r#include "md5.h"

7 c5 [0 A+ Z* h" x( P! F& z3 f, O/* Constants for MD5Transform routine.
*/


4 }. C! `$ X2 S9 N#define S11 7
#define S12 12
5 ?" _+ H# X ~. T#define S13 17
) C8 B# }( J* O: J, k; h#define S14 22
! t; c2 r' g+ T9 G#define S21 5
#define S22 9
! ?- J& D$ w5 O$ }; A9 U8 F) c l#define S23 14
#define S24 20
#define S31 4
#define S32 11
#define S33 16
* i: ^! O0 Z% I. C$ o0 @#define S34 23
+ X( E& d7 y$ D6 j7 @( l* s#define S41 6
#define S42 10
& ~& P/ c7 I# n2 ^1 Q#define S43 15
#define S44 21

# o" v+ [! u( F$ l9 {6 h7 jstatic 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, j$ S2 s+ L# D% l" z" lstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
3 E$ x9 ] H8 N7 Hstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

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
6 w& E; a3 M8 W( l# A; E) a};

/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
$ A9 a% C4 q) v" u; a#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#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))))
( Q. Q- s _' Y+ O
. N6 z: h7 B, C: B f4 k/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
7 n4 e3 I7 m F0 E3 v- E+ hRotation 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); \
}
3 g3 l. X3 C* E7 B" a#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); \
}
0 V6 S) ^- ^& j8 I% q9 S#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
& d) b. N; j+ b R6 T; S/ P
/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
MD5_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;
}

" a6 E4 ]/ X7 b5 h" X0 N/* 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 */
: X4 c C9 z b. s6 lunsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
! }! V* T7 O2 K- S ?' v) H+ Z4 ^{
unsigned int i, index, partLen;
( M: m. a7 O/ X+ J* E- Z
/* 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

% O# v/ K" x# A4 \+ O2 p% ^" _