md5加密算法C++程序

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#include "global.h"
+ d5 y8 w2 I1 B9 ~/ {& U#include "md5.h"
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/* Constants for MD5Transform routine.
*/

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, w0 v6 ~# ]/ G- o, c# O# ~#define S11 7
& j4 w" Q- l. d1 W# G4 Y" K#define S12 12
#define S13 17
#define S14 22
8 ~* G; {& D" C$ ~#define S21 5
7 u9 K0 e8 w. ]% m7 e. `' ^) z& j( q- w#define S22 9
#define S23 14
#define S24 20
' r x7 w' V' a; M* \; d#define S31 4
* b' {7 J, _" y#define S32 11
3 J6 t' n1 P+ E: i0 p. W' z#define S33 16
#define S34 23
3 @) N. L6 o' `$ x! m#define S41 6
$ T0 X; L5 H1 X: @#define S42 10
( r2 P3 K2 v) d, H1 i9 W) }#define S43 15
#define S44 21

static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
, H g2 r) H. l7 s! n3 Wstatic 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));
c7 |" C4 f2 A: gstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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2 } Z' x! N' i. 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
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% R% d4 O2 P7 P/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
. C- |, Q& P9 s2 G! \& Q; z( N#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)))
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/* ROTATE_LEFT rotates x left n bits.
*/
7 c N4 @* ?3 Z, H t8 Q2 {#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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2 k) R, x% }1 w" ^" Z# u: o/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
! R+ S/ A! G6 ERotation 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); \
}
' t | S/ N) a& l! F! I X#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
. ?0 w; L6 I6 |4 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); \
}
$ y* \( Q! ]4 m3 A#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}

5 a4 N2 e8 I i+ m8 M9 Y/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
5 b0 g6 `6 k% b) [5 A9 jvoid 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;
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/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
5 R3 q3 Z5 F; bMD5_CTX *context; /* context */
unsigned char *input; /* input block */
* m* \* U. N% |. F, Iunsigned 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);
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/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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