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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#define S11 7
# V6 [" a# G# |8 Y#define S12 12
8 \, Q2 L0 \( Q8 z#define S13 17
#define S14 22
#define S21 5
#define S22 9
$ s* r! G# ]# Z, ]0 l& H4 l#define S23 14
#define S24 20
#define S31 4
- |$ M+ S! C- i; H#define S32 11
& o) A: _$ o4 s+ j/ L g% f. K( T#define S33 16
#define S34 23
! z1 F" n, r! \2 l; Y! g5 V5 m, y#define S41 6
" c4 w- ]3 y8 _3 W, B0 D#define S42 10
#define S43 15
1 T& n1 R3 r& A5 ~. J6 a" }+ K#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
" r2 Q& s8 O+ E2 _- Lstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
1 a3 @% T7 n2 F0 v8 xstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
4 ~5 z: s) x/ v- r: M$ E5 ustatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
8 C0 c: h7 o5 r0 K8 q; D) |3 fstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

static 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
3 R# e' ?5 M, @9 J0 P* K$ ~};

Q, f7 ^1 x4 d/* F, G, H and I are basic MD5 functions.
*/
: K" A0 {5 z# o( b" Z#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))
& l" ]- k$ ~( n#define I(x, y, z) ((y) ^ ((x) | (~z)))

' `6 d& z- [/ e" D7 p% k/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation 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); \
}
7 |1 w4 r# u, `/ Z#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); \
}
: @+ ~" q4 x- C4 ^#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.
*/
0 L+ A: N* G7 G, X( [8 m* M" d; [( wvoid MD5Init (context)
/ E' i! I8 C5 Y% }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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& m! z& _3 M+ H% K/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
0 r) ^( N" l: @0 nMD5_CTX *context; /* context */
+ @- D1 k4 t! I' j, @* O1 a7 U* [* Gunsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
, ]) x) E( N# h* N7 u) z{
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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