md5加密算法C++程序

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#include "global.h"
3 n1 R0 v# K* `$ m! u#include "md5.h"
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/* Constants for MD5Transform routine.
*/
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8 m* K; ~& W; ]) ^; L#define S11 7
#define S12 12
#define S13 17
#define S14 22
- B5 f9 f% Q5 N& k#define S21 5
# W# U, t5 e! Q9 o" @#define S22 9
F M7 m- S2 {3 E. i2 X#define S23 14
, P( Q- }. @) G* f7 d#define S24 20
+ b- g1 S4 y; L! z* B: O#define S31 4
#define S32 11
2 ?5 \' f" @- _#define S33 16
#define S34 23
#define S41 6
0 M% o4 J( \% t#define S42 10
7 [0 V( w; q( @: A) \" g+ \#define S43 15
#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
1 [. R) z7 g9 \ ^5 o, q8 Y5 D0 K1 pstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
1 d5 l p* r6 Y6 J% y8 gstatic 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));

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
};
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/* 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)))
9 H& r4 Q1 m9 {: x0 X#define H(x, y, z) ((x) ^ (y) ^ (z))
; w& `. @0 y: p F( l2 i) k#define I(x, y, z) ((y) ^ ((x) | (~z)))

& W g- a x5 V) [/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
7 B2 s% R' G( R. [; K) IRotation is separate from addition to prevent recomputation.
*/
# b1 Z9 U* x) d& _2 J7 I; i#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
( ^. |: ?0 s5 d7 X1 }5 }6 S#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
& g/ G8 Z" H4 I7 A7 ~* F. }#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
+ _" M {2 l( ^( u( o6 J( `#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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& p b" `/ Y& P3 T. X/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
* a" T" h8 t* d. Y0 S# Bvoid MD5Init (context)
- e/ r$ a3 I- A2 l9 YMD5_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;
}

7 p! J) t* Q: F* [/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
8 B6 a( G. }" E. |6 ~# W2 kMD5_CTX *context; /* context */
4 _% J z3 @% f& i0 Iunsigned char *input; /* input block */
' s! Y. Q5 B M4 b; J8 _; D. Yunsigned 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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