md5加密算法C++程序

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#include "global.h"
#include "md5.h"
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% _- X0 ?" y6 y/* Constants for MD5Transform routine.
*/


#define S11 7
#define S12 12
2 ?0 @' z! o0 x: n6 | u#define S13 17
#define S14 22
#define S21 5
#define S22 9
#define S23 14
#define S24 20
* G: P! a/ m, t9 a#define S31 4
+ G) O( L8 u7 F: h#define S32 11
#define S33 16
# w N1 P" i: Z# D#define S34 23
#define S41 6
/ l+ |1 u$ b* |. t3 ~4 n#define S42 10
#define S43 15
5 G6 l6 t4 [6 f, c- a9 y2 n% z#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
+ B1 b4 c1 E; gstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
! k0 o3 {2 J( F# W3 Y/ P: S+ G/ U0 fstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
; g) ?! W5 O2 x/ g) X) A) B! j bstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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" Q' Z8 O" F4 m# @9 B2 q7 hstatic 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
4 E; ~7 {* \. q" Y# E3 r};

6 t: a7 e* m% s+ a/* 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)))
; g% U9 |' j) i#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* ROTATE_LEFT rotates x left n bits.
*/
- ~1 w" x C9 A ~& n#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

" _5 ?1 q( l& I" E5 t! @/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
5 i) ]- X( R3 d4 c1 D' fRotation 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); \
}
' E0 e* G+ A- T) p: l1 C8 I* j#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
* D2 V$ e" O. \#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
4 p+ p! H- [1 Q7 I: c; j- K3 n& x#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}

/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
" u, j& L0 R* ]7 a& Yvoid MD5Init (context)
8 C1 W& Q1 _5 Q0 f9 u! gMD5_CTX *context; /* context */
/ U9 `" u" U0 ?- J4 n9 n{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
G( G' {$ Z4 H& p: y( J5 Q) k3 L9 V1 B* @*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}

/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
3 u, U5 r% S. Qunsigned char *input; /* input block */
unsigned 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))
&

guoyun786

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