md5加密算法C++程序

乐乐天

#include "global.h"
4 A" l2 t+ y/ {7 n+ q; s: l* M4 r#include "md5.h"

0 n! S& d2 H2 x& ~" w/* Constants for MD5Transform routine.
*/

& M/ A& R3 x4 u L7 r8 E3 P& V
v* i6 X+ L9 i6 C: R& F. o#define S11 7
#define S12 12
#define S13 17
#define S14 22
#define S21 5
#define S22 9
5 C3 |# W- I) j9 O- s#define S23 14
$ q6 h# n* N, {, U#define S24 20
#define S31 4
& E6 @% [: k- z+ `3 h g#define S32 11
4 n- X9 X t! \& U7 V6 H: [ J) V#define S33 16
$ `5 S2 P$ `& q! M#define S34 23
/ x* U5 [1 R4 {/ z( G% [#define S41 6
9 O, P% R' h$ W#define S42 10
#define S43 15
4 K4 q5 b6 Q! n3 k' y. u#define S44 21
. R# d# _- o! R: o( D
) Q7 M' `1 Z/ i7 dstatic 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));
7 S+ j3 z8 Z0 H8 `7 tstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
( b% L6 K, P9 a7 ~static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
, c0 z- d; Z* S8 `3 b1 J0 X
0 C, \/ O/ W$ n& N N) R- `9 B1 ]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
& D# z3 i2 s9 |' F0 @* y};

/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
+ x7 W; {3 `6 h# F4 y#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)))

6 j S% \% W: _0 i0 S/* ROTATE_LEFT rotates x left n bits.
*/
2 x# Y. V0 |9 v8 _; \: W#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

7 d2 l$ S2 H( g6 \/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
8 I: m+ J w* C* g9 h$ V% ]#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); \
}
/ X7 h! v- [- j! U#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); \
}
0 `, i/ x$ W0 G
) q, t8 O0 h! G' V3 C* W! W/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
MD5_CTX *context; /* context */
" a4 F+ p5 K3 M5 d$ u{
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)
, ]: P( z9 Z+ E" J1 d5 MMD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
5 X: n7 S7 O' z( u! ^6 B7 T& z1 P{
unsigned int i, index, partLen;
+ j9 I2 E" e& s# V' d! P7 I3 t" W9 r( W
/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
; R$ A G5 X; B7 h5 n
/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

guoyun786

3 f( {: e! H$ a. ~/ Y$ p
! b( q% ?2 P" \* i