md5加密算法C++程序

乐乐天

#include "global.h"
9 n6 ]# _' D% G% S& v% t# H#include "md5.h"
% @2 F# i& g9 t& u) z6 E
( h0 Q5 ]4 r" @! s2 U/ J/* Constants for MD5Transform routine.
*/

8 S! }# E: \8 a9 x9 E6 n4 N# Q; c
#define S11 7
+ O! N. O/ f: c6 O; ?#define S12 12
#define S13 17
#define S14 22
#define S21 5
#define S22 9
1 F& j) I3 q4 U1 K#define S23 14
#define S24 20
B- A3 B( _2 C$ b#define S31 4
. u: }" [8 |& {#define S32 11
#define S33 16
4 {7 t5 s- f2 Y7 T#define S34 23
0 ~' j! y: G; @. k$ a#define S41 6
#define S42 10
2 g0 O, m* ]4 U, Z#define S43 15
#define S44 21

8 e% b: s/ p/ m# Bstatic 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));
2 O, s7 n7 j6 nstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
9 V- Y/ d7 A7 B/ y9 l# M
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
};
- a* y+ T# _$ _; J
' V; K4 o Q3 n( V9 Q; F' D/* F, G, H and I are basic MD5 functions.
*/
6 S3 ]$ O" x+ h0 _; T#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
) A, U0 [" u6 k T9 H$ T#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
5 P. Q+ C( @( G T#define H(x, y, z) ((x) ^ (y) ^ (z))
) u) F( k" x2 F) R4 H3 m#define I(x, y, z) ((y) ^ ((x) | (~z)))

9 _/ v. `3 b, n5 G/* ROTATE_LEFT rotates x left n bits.
*/
6 o% J# E$ u4 _, o+ r#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
N; _! N# J8 F3 r; o z
5 z* I7 T5 m2 r2 J- u/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
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); \
}
#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); \
}
#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}

/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
- ]' q% T. w. t2 W" Q0 ^$ L Zvoid 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;
" \7 V8 ^: k( |* l! _6 r}

/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
! f r, K3 O9 y* m; wvoid MD5Update (context, input, inputLen)
$ P% `% K6 t" R( m, Q" MMD5_CTX *context; /* context */
unsigned char *input; /* input block */
7 I `9 m% e C1 \' I, dunsigned int inputLen; /* length of input block */
{
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