md5加密算法C++程序

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#include "global.h"
#include "md5.h"
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) G7 z9 e7 O* F5 U/* Constants for MD5Transform routine.
*/

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2 Q* g. W L6 D% E1 U#define S11 7
) b5 f! D5 n4 p7 \' H#define S12 12
#define S13 17
0 {1 w9 K2 Z0 g4 z f c% h#define S14 22
#define S21 5
#define S22 9
" L6 x# ~5 Z- O$ W* P# h9 i6 H#define S23 14
#define S24 20
- x/ F: M" ]/ L- T+ U! F#define S31 4
#define S32 11
* y% L+ `2 O+ r% F$ q#define S33 16
/ Z- w& Q4 g8 j! f#define S34 23
#define S41 6
/ c3 s! _. y) d- Q8 c#define S42 10
#define S43 15
#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
1 a% z: j. ~$ Y1 G) t( jstatic 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));

! r1 [' e5 d3 y; `, `# {7 L7 qstatic 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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- p& g& u1 J" Y9 l; P( x/* 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)))
- e/ l0 m' |9 ]% `+ i4 ?5 }. s1 R#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.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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& e! P% A+ e9 |5 P9 Q5 H4 X4 D( K/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
. } J* L. x2 e9 r y" k* U6 YRotation is separate from addition to prevent recomputation.
*/
* a7 l$ o8 Q2 _8 W#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); \
}
0 e; A3 z' u" ?1 ]( u#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
' ]/ F" t; @2 G2 m6 i ?#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 */
9 {5 F, s+ d- @2 N% B2 d{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
, |% v: A; m ?/ ~*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
# j' z, H) r3 c% x. b+ N; |}

/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
! }9 X8 B- r, L* Uvoid MD5Update (context, input, inputLen)
8 k6 x) H! y5 R* b" RMD5_CTX *context; /* context */
unsigned char *input; /* input block */
2 R5 S3 R8 f: I% |. Munsigned int inputLen; /* length of input block */
_4 R b& \0 f( |{
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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