md5加密算法C++程序

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#include "global.h"
0 n1 p A$ x) z#include "md5.h"

/* Constants for MD5Transform routine.
*/


Y+ u: o! Q6 G& F0 ?- R#define S11 7
( Z8 N" f& ~ E1 Y( E% f: w#define S12 12
#define S13 17
6 A. w) P/ _8 S& e" }: j! \6 N' y/ u9 }0 V#define S14 22
#define S21 5
5 u# p9 a. F0 M1 g#define S22 9
+ ^2 g9 b' j0 E$ O4 i#define S23 14
* z' [0 T& }7 d. a1 y. A! ~1 w#define S24 20
#define S31 4
#define S32 11
1 n, s$ X) L& H1 B0 \6 k" T#define S33 16
; K' V" T4 F4 [7 B$ v#define S34 23
4 z( L1 ] f. m( J0 |2 o; Q#define S41 6
3 G7 j o0 b, l#define S42 10
4 {/ A: L# u! C8 V#define S43 15
#define S44 21

3 I6 U8 {; B. ]/ H" C( \7 `static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
: o. V: \% i' R$ Qstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
- c: p- m; M8 l( I# z! A0 L4 rstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
$ m' U0 W1 C; t8 }. X% ]static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
/ \2 {9 n% P' l+ r0 S! I
. h+ |2 V) `5 a8 t8 vstatic 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% {2 I( [3 g/ I k. k( Y};
& N! U# e5 ?4 Y2 S% Z
/* F, G, H and I are basic MD5 functions.
*/
. ~9 O8 h% I7 g#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
( |& v+ Z) i$ M, v- y#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
2 K9 u6 |% `% @. l# E5 t#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

6 r: C1 ~) }* P5 n J( W/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
T, x" {/ q8 r( `6 Y#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); \
}
#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); \
}
% X* h/ b3 i( b* A4 K( l
/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
. R, x8 L$ F# mvoid MD5Init (context)
: a5 a. D9 i+ W: x, LMD5_CTX *context; /* context */
! T- H9 O) t3 W0 t0 F% |. L4 D{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
, R5 R" u/ |6 M2 j* w*/
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.
*/
' e( f* @/ P ^! pvoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned 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);
1 u5 r7 Y6 p! O K8 `3 t( h1 ]
/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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