md5加密算法C++程序

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#include "global.h"
* }1 `9 A6 }# X, x) b0 K#include "md5.h"

9 p4 f7 `8 e% |0 s/* Constants for MD5Transform routine.
*/
, O* Z9 g$ h5 T$ U

#define S11 7
#define S12 12
#define S13 17
( p2 O F9 I7 ~' a6 V#define S14 22
% `! L5 E$ w2 A- n( O#define S21 5
X0 F; y1 Z- M; D* p% r1 D#define S22 9
#define S23 14
7 r7 |: K$ R+ w#define S24 20
#define S31 4
9 v' g& t3 j+ y7 [- ^( }; d: r/ D#define S32 11
#define S33 16
: ], p" e, w# ]( S#define S34 23
#define S41 6
3 b" C9 [; Q7 k" l. D) S) c3 {3 r#define S42 10
#define S43 15
" p# R& ]/ q* i/ r#define S44 21

( @' S# k+ H( k6 v( }9 q; Bstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
9 z t7 E/ ~5 z( R+ x# Ystatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
8 ?. _4 x0 e7 a; Istatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
4 d7 M/ H( R- n! g! B( t
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
};
8 Z; M: u/ w0 ~" S
/* F, G, H and I are basic MD5 functions.
*/
/ { _* D; n0 H#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
0 q% ~1 I5 |# A7 ?#define H(x, y, z) ((x) ^ (y) ^ (z))
" R# w. b/ s# F9 @8 K+ 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))))
7 \# ~& Y) \+ E
* F& e, E1 y& j" @. l/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
* _1 ]) \, ^, t! i1 k. \8 LRotation is separate from addition to prevent recomputation.
*/
i( q5 b+ k; N8 ^" q5 m#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
7 N: H' }! V8 ^* o! x6 {: c/ l#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); \
}
$ M5 j9 W2 S, \3 O#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}

7 b- Q# K6 }+ L; M3 G( u/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
MD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
% v( T2 |6 |) i2 G 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.
*/
9 F( ]/ y( W: \$ }; _9 xvoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
" E1 S7 j- Y! z3 d$ w$ munsigned 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);

/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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