md5加密算法C++程序

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#include "global.h"
+ {! U9 K7 K) m4 U8 K7 [#include "md5.h"

/* Constants for MD5Transform routine.
*/


#define S11 7
#define S12 12
& j5 C9 @& U( V9 @$ N% h#define S13 17
$ Y( F/ E* e- V9 u( b2 o' ?#define S14 22
5 m( H J; v) T8 i2 v#define S21 5
#define S22 9
#define S23 14
#define S24 20
#define S31 4
# l7 h, P! {3 }: U#define S32 11
#define S33 16
% J) d6 _( A* N O2 a#define S34 23
#define S41 6
#define S42 10
#define S43 15
3 K3 c& o8 N" r+ l7 r#define S44 21
2 d) a+ W/ g, \# c! z/ u
static 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));
! H/ A5 m# D6 Ostatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
- z- y% `7 K* Y8 Estatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

, E0 P& p7 Q3 b" E9 `9 D" mstatic 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
}! [% m; l/ P" R8 U7 n5 i4 \4 }};

/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
9 [/ Y, D: X; }; P4 G$ V6 h- T#define I(x, y, z) ((y) ^ ((x) | (~z)))
9 S: |" A$ g3 f% R! e
/* ROTATE_LEFT rotates x left n bits.
*/
- K( g" N. @$ [8 C N8 O6 [#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
# z4 B7 q( K: A
) i! v( D/ x& H, I/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
3 Q8 M2 V7 R% _" h8 \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); \
}
1 Y0 n6 [! g4 |; {* |#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
( L) \8 O5 g# w: \6 f#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
" v5 s, X. E( B, k4 [#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}

/ R1 N3 F5 b+ _) P4 u% z/* 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;
}

/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
3 P7 s, _7 u2 n6 r8 H' y8 r' ~2 r) ivoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
" t/ n9 y' c5 r+ F, I' {unsigned char *input; /* input block */
% b3 e& \$ n' g3 [unsigned int inputLen; /* length of input block */
{
unsigned int i, index, partLen;
4 C3 k2 D' ]! }9 K- E% k* p
/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
" J5 Q, [: A) k, s* Z8 _9 k2 w" R
/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

guoyun786

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