md5加密算法C++程序

乐乐天

#include "global.h"
#include "md5.h"
t5 k5 W, ~; K5 p9 `" t
/* Constants for MD5Transform routine.
*/


#define S11 7
#define S12 12
- ~0 Z1 D+ I- I& G; U#define S13 17
#define S14 22
+ [; W. Y* A% ~( {# Q- R#define S21 5
#define S22 9
#define S23 14
#define S24 20
#define S31 4
#define S32 11
#define S33 16
9 j k$ G/ s& C+ \! N% E#define S34 23
#define S41 6
3 @6 _- t4 P5 ?# j& U2 o t( P! I#define S42 10
#define S43 15
#define S44 21
0 _+ j" E6 I& |/ N k2 q: I
* V9 t- b2 T: Q' kstatic 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));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
9 ^! H; s8 d0 P7 e) {. x/ m
( c& u: O3 h* C$ {/ tstatic 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
};
/ w' H* t0 ?5 x1 Y- h' [) W; M5 |
/* F, G, H and I are basic MD5 functions.
*/
3 w5 t0 t' {/ ` g2 G#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
) P3 ?1 i+ x$ `, H5 L( B#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

% D# B: `2 G! K2 |5 ` z/* ROTATE_LEFT rotates x left n bits.
*/
, v5 \( N3 g% B0 Y- o2 Q#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
" m. b! M% e! f4 cRotation 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); \
}
#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
7 O9 M5 O. w' R I- S- |2 c#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); \
}
7 i7 q; P" L. y$ r
/ J6 R1 l" ~8 ]' O/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
% E$ R( F8 c! e9 h6 H2 M7 B9 dvoid MD5Init (context)
6 F3 e( s5 t0 ]6 JMD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
{/ O* ^( b/ @! o- x6 h. c) Y*/
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.
*/
* P0 o, F/ g4 v& g! Nvoid MD5Update (context, input, inputLen)
0 B. j' e, R/ v A6 H2 JMD5_CTX *context; /* context */
, Q+ B5 I0 j9 n& f# L: Z% Funsigned char *input; /* input block */
5 a8 L) c& G3 f* s2 zunsigned int inputLen; /* length of input block */
( D9 _; [% ]5 i2 g+ U{
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