md5加密算法C++程序

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#include "global.h"
- v$ l' C2 p# R2 ]) B# C6 d* x5 r#include "md5.h"
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/* Constants for MD5Transform routine.
*/
# G, M$ P4 t* M& B! B

" l4 x: H4 s, l4 j4 Z% \#define S11 7
, U8 J; o; X2 T0 m( P' b- x# n#define S12 12
#define S13 17
#define S14 22
8 f6 F9 ?- p1 b7 T) k" K$ ^+ |#define S21 5
#define S22 9
b; W! S+ o) [ w5 ^/ Z; {: g#define S23 14
) E9 I. h5 c: A* O5 s5 N# Z#define S24 20
#define S31 4
#define S32 11
- v% d% _; T9 @; W& B* I#define S33 16
* Q2 h) {* \; @#define S34 23
#define S41 6
/ A. ]1 C3 Q3 ~2 P) |+ {#define S42 10
9 c4 E/ ?* b% B; B#define S43 15
#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
- c: D3 ]2 Z7 jstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
" o% e. c1 r& P) n; M- dstatic 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
: N5 u% }9 t3 G0 Q};

/* F, G, H and I are basic MD5 functions.
*/
% u; ?" o# o- u#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
3 |6 y! G' f5 a% L8 x#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))))

. I; `' s# }# B. b9 U/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
X' m5 h& {" |( u; x3 M, pRotation is separate from addition to prevent recomputation.
*/
! d/ X( X$ e1 I" w! {7 U. Y2 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); \
}
8 f/ J- a3 j5 C7 I" V/ _1 _% E#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* b* O( b/ w) ?" D! ^+ L( X! _#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
7 n. o2 k" L/ S#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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) U( M7 g7 O: o1 e" v0 L) k5 A* y/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
9 O; {# ~8 T6 l9 jvoid MD5Init (context)
MD5_CTX *context; /* context */
6 i# N6 I5 p8 `) Z5 s+ m" V% I6 W; d{
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;
6 x) P5 g1 }/ k, r}

* w' Y6 f X4 ?: p/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
. v* [7 {3 Q- u( o/ K$ P: kvoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
! ~) q5 ~; A$ N8 `unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
2 A4 x7 y1 N* ~) u' a{
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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