md5加密算法C++程序

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#include "global.h"
#include "md5.h"

/* Constants for MD5Transform routine.
*/


& i1 ]8 ^# d7 \, C; C- P#define S11 7
#define S12 12
#define S13 17
#define S14 22
1 L" `# P* x% C) x8 [0 v3 \#define S21 5
#define S22 9
#define S23 14
#define S24 20
$ c; i Z; o5 Q; d9 q" W#define S31 4
+ U3 t, a4 K) q) y#define S32 11
#define S33 16
#define S34 23
#define S41 6
#define S42 10
#define S43 15
0 f& M4 N9 [0 h; S3 p( x! w#define S44 21

) n: J* Z( c. `% Ystatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
# S; c- o& A) b! L* d- J! vstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
7 F! @0 H! P7 a! I' Kstatic 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));

! e: ?# Y, k g' `3 L2 Cstatic 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
};

# S2 Y! H# s# e$ M+ N, {+ ^/* F, G, H and I are basic MD5 functions.
*/
( L$ y( c3 `3 I3 ~#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
K) Q1 I6 J- E% v8 |6 u#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* ROTATE_LEFT rotates x left n bits.
*/
( w3 {5 }# o2 E6 U0 d" |#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
/ _" V- d7 K) F+ w, [
/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
' T4 E* x+ C) m/ DRotation 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); \
}
+ @- v4 o% v) ^: G! Z#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
6 ?7 T( x; f$ ~* _6 t/ v#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
8 E. U' X5 ^9 y- \9 K2 c
+ w7 g: u. v" L& _7 S5 I; `/* 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.
$ H: k$ ` X5 ^* C* e, T) A*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}
$ D8 S1 f8 V( v1 |$ o% }
& O; w8 d9 F E( o5 ]" G) a/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
0 X2 w) f' P1 OMD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
{
unsigned int i, index, partLen;
6 J) ]0 t9 {2 q4 k2 x
/* 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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