md5加密算法C++程序

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#include "global.h"
# c5 L: y; Y/ u- H8 a#include "md5.h"

/* Constants for MD5Transform routine.
*/


* q1 ]: _$ f/ l2 v# s; f i! V#define S11 7
- O$ B% Y' G/ x' n#define S12 12
#define S13 17
' \6 U5 K) N$ ?* u2 }; F) {% Z#define S14 22
, ^( N: f6 {) x% y#define S21 5
4 a$ j* C" U: F% X! ]9 z3 h* E#define S22 9
#define S23 14
#define S24 20
#define S31 4
- X8 @" E; e. R0 \9 P#define S32 11
#define S33 16
/ M* @, f' l' M7 n9 b#define S34 23
6 i; l. l: `5 [ z% y5 r6 @! m#define S41 6
9 }% r$ @( o' O) f#define S42 10
#define S43 15
9 h8 R5 y7 b1 T' C/ e8 J) B#define S44 21

5 j) p3 w/ U O V: @# pstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
8 r* }& s n3 `4 P K# g! Ystatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
' P+ J5 V' u1 c0 Y8 }! _( _static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
" n) f+ B3 L7 O$ k% I4 ?# H3 O$ M
- i0 s+ g5 ~) X( }$ Ustatic 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
1 f; E& @+ r, v1 h4 S% y};

/* F, G, H and I are basic MD5 functions.
*/
6 m) p+ K# y! w6 r7 N" J! |#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))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

/ f% W$ S% e. p) W: d/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
3 y8 W0 @1 l) {# P. k
9 \/ f9 C# s- j; k/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
: G7 X' ^1 M* g M, b& J#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); \
}
% S2 f& f( z* f' \#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}

% d; Y3 }) n0 K; }) X f/ R1 [& R/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
( t ?# ]9 r2 X4 w8 R8 SMD5_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;
}
5 V7 a [4 Q# Y
/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
* W* O T, \9 h9 n) \# C8 S# Q{
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))
&

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