md5加密算法C++程序

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#include "global.h"
" G+ X4 r; Z3 }#include "md5.h"
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% u6 z+ D$ Z) V9 Q/ P0 n$ K/* Constants for MD5Transform routine.
*/
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- v# e! D2 w, w% `#define S11 7
#define S12 12
5 a( M4 i, s, R. Y' U0 e$ F#define S13 17
( A1 u' T! d4 C- A! V. N b#define S14 22
#define S21 5
#define S22 9
6 l5 F/ @: E: W#define S23 14
#define S24 20
#define S31 4
#define S32 11
#define S33 16
" A+ b% D1 Z4 d* Q#define S34 23
#define S41 6
+ y) B. s( _( |6 c, T4 j#define S42 10
& H0 a& S: R% D; V7 ^3 L q9 c#define S43 15
#define S44 21

; M. \4 ]6 W2 F4 Lstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static 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));
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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
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7 F8 q% F, H* A% N& |5 O+ b/* F, G, H and I are basic MD5 functions.
*/
8 G( Q+ s5 D& c/ L#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
0 a! J$ I3 b! O$ O+ q- O#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
" C3 \2 J4 R# o- c% q#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* ROTATE_LEFT rotates x left n bits.
*/
) l8 Y- y; v' v0 H& \. G" H#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

I) k5 K0 Q1 n/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
! Q# v5 L% d T% ^6 ^& q0 n- O P#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
. e& g' E( {7 N3 y#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
3 h' P1 b& R% T/ M& `#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
8 r/ u! L; D& a$ r7 C8 T& V1 @#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.
*/
void MD5Init (context)
MD5_CTX *context; /* context */
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context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
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context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
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/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
1 Z$ N7 Y9 I/ A9 C, O% o p9 Ivoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
" e8 X a q8 k6 ?0 I! g& \unsigned char *input; /* input block */
; A/ K& d1 r6 {4 Dunsigned int inputLen; /* length of input block */
' Y- i+ E/ Y. H8 Z: j{
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))
&

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