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.
*/


0 E5 U; O+ I4 |/ G# Q6 ]#define S11 7
#define S12 12
#define S13 17
* [% c7 r8 A! l1 M! b2 @#define S14 22
#define S21 5
2 C0 z0 P; b. s3 K8 @) c. j" l#define S22 9
, z6 d; y) s! X7 ^1 l+ r7 H! k' n#define S23 14
#define S24 20
#define S31 4
#define S32 11
* F- V" n9 F% N& m3 _#define S33 16
6 W0 B- h% Q& j3 S; X1 D; s#define S34 23
8 o+ O7 x n9 }* Q9 ~. x* W#define S41 6
+ ]/ ?7 h% M5 e# l& o. i# y#define S42 10
#define S43 15
3 k9 \" o1 a \, Z#define S44 21
# d1 ]) l2 k' v1 s0 C. }( C9 u1 Z
static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
7 A0 y. W0 |) Ustatic 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));
" I' b+ f$ A& X0 Z, a
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
};

/* F, G, H and I are basic MD5 functions.
*/
0 c/ L0 x, E2 I; C1 ~( U#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)))
! Q4 t% a2 R! x& @0 g
8 [0 {5 s/ }4 \/ A, U/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

5 q* I Z8 }( n4 B* z/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
6 `9 x2 y1 d- z* L9 J#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); \
}
# s3 s& P! D1 G3 D#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}

" S1 Z5 E% O8 o) v1 s/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
8 m& i4 D& C/ G! BMD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
' e& ?1 X- o0 L7 T4 T* T# B/ {& v*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}

, ]2 H" I- F v9 Z! E8 r/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
) g1 L( _: T( K- B" ^! wMD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
; g: [* p6 ^) ^' }- d2 y{
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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