md5加密算法C++程序

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#include "global.h"
#include "md5.h"
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/* Constants for MD5Transform routine.
*/
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, F" Y+ Y% o% t/ J# k8 y; {9 _( D#define S11 7
#define S12 12
#define S13 17
#define S14 22
" Y2 s: R8 r' G/ ]+ Z9 j+ \: k#define S21 5
# S+ B! j3 A2 J# ~#define S22 9
, }# J; S m& N' v#define S23 14
1 q4 I5 y8 m8 y* i4 f#define S24 20
#define S31 4
#define S32 11
#define S33 16
0 h% {- J0 B4 d7 P. m#define S34 23
7 {' o; c7 g! W( k7 n9 O$ z#define S41 6
#define S42 10
0 v# z9 K' O: `( O$ v#define S43 15
) z9 ~/ m6 Y6 ^: f$ f#define S44 21
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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));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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4 D9 p9 C* k* I0 h* i6 L* I5 pstatic 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
8 g* p6 a. A4 u! B3 K. u" r};

/* F, G, H and I are basic MD5 functions.
*/
0 s. n8 ~" |3 N+ V, k( C8 i#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)))

8 I$ {2 o1 r$ M$ W6 Y/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

9 h* c9 V, b6 F6 l2 l/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
' D. w( L# L# z( J1 ^/ }! V$ \Rotation is separate from addition to prevent recomputation.
*/
; P! A1 P' E; T9 `( q S6 D#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
8 E4 h7 e X" U [#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); \
}
5 p- {1 a+ I7 C- N& f1 A O6 B* p#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
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/* 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;
}
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" \* M9 R4 n* G* s( S5 r& I/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
) {' @" Y6 z! r% u% G) hvoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
# K6 Y3 w3 Y7 |" ]6 }( K- Yunsigned char *input; /* input block */
% `/ [- _, y. N8 ?" S0 eunsigned int inputLen; /* length of input block */
{
unsigned int i, index, partLen;
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/* 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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