md5加密算法C++程序

乐乐天

#include "global.h"
#include "md5.h"
" w. i- u* b. _' q- v8 j
/* Constants for MD5Transform routine.
*/

/ P% k% U- \% J9 a1 ]% p( v
5 ^: l Z. n2 ?1 V2 Q#define S11 7
% ]$ C8 |' p: V- d#define S12 12
" B( M- F# I6 A& |4 O3 ^#define S13 17
$ d% n1 N: j4 w x. d4 e#define S14 22
#define S21 5
#define S22 9
#define S23 14
#define S24 20
#define S31 4
#define S32 11
#define S33 16
+ J8 W) `0 W& S#define S34 23
#define S41 6
#define S42 10
; T# B3 u( B* P+ I) O" h2 n#define S43 15
#define S44 21
; N2 ]: n2 R ~ x/ y3 g8 M: V3 _
( b" f; @8 y3 _4 w$ Ustatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
$ o' V% p$ J! f9 P" wstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
. j' l" S- ^ \! j6 S& Sstatic 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));
_& B4 s" S' n( f$ Y, r u
& d( T5 L+ t* t# t* c' r* Vstatic 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
2 J2 d' x ?- N% u& [( ]};
! l+ R' A1 I2 V- F. u6 Q5 s
/* F, G, H and I are basic MD5 functions.
*/
% Q O" l. s$ g6 A#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
* ^# L/ h% |' F( J) c& r! z#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)))
# m& W/ h* i. ?6 R
/* ROTATE_LEFT rotates x left n bits.
*/
7 Y: d2 D1 W& g, V6 ?# z9 K#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
5 l+ O8 ^8 _- e, P+ m
1 ^4 o( @$ {- \* d4 x7 l1 }/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
" N& ~1 f0 f1 C0 X5 c' {Rotation 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); \
}
) T$ ^* o) q' }% \#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
0 g' N6 s7 x \8 _* r) j5 g#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
) F5 l) D8 D- g#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
/ l5 e, v5 e8 P1 A
/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
6 ^1 x( l# \0 x$ f$ evoid MD5Init (context)
- j8 E4 A$ h$ g) rMD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
7 L0 f" R- J# Z7 W; e& F. d*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}
1 p \$ Y! h! p$ M
/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
+ \: U _; Z; ?- C7 ~void MD5Update (context, input, inputLen)
# z' {+ n! N! {: ~1 w" d: e% |* ZMD5_CTX *context; /* context */
( D/ U3 j f2 p# ]" P0 Kunsigned char *input; /* input block */
; X1 g, U' ~' E- i& ^8 S9 b" tunsigned int inputLen; /* length of input block */
; |' g+ t6 E- ]{
unsigned int i, index, partLen;

/* 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

" H9 Z8 ~8 I, V5 l6 u
% y8 u5 S. q" l3 p- Q