md5加密算法C++程序

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#include "global.h"
7 }1 \: y% v- Y7 q9 ]" x. o#include "md5.h"

. H2 a5 c9 l: `0 R6 B' u/* Constants for MD5Transform routine.
*/


3 w5 ~4 Z6 T! R' o#define S11 7
#define S12 12
% w" Q4 [/ S( {#define S13 17
5 c5 D5 A! o' \6 Y% i+ j2 H#define S14 22
: k; @6 J) O, J! d9 M! N2 D% Y9 J O#define S21 5
#define S22 9
4 o9 H+ ` c/ f#define S23 14
#define S24 20
) s. e% A- Z, A#define S31 4
#define S32 11
+ ^6 \% f# t: j3 k#define S33 16
#define S34 23
#define S41 6
( v9 ^, s4 \- A4 y% ^: n% d#define S42 10
#define S43 15
: `3 A* R, ?+ @#define S44 21

static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
7 o6 G6 }1 p$ y+ C3 U" x& gstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
! D' }% y6 j# Kstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
! M6 `( @4 O% B# @9 b1 S* L' Q m
2 A# r- o8 B( q! t1 l 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
};

. n3 z. d# E+ `: D/ R/* F, G, H and I are basic MD5 functions.
*/
+ v5 N+ ~6 h* |9 h9 ]#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
! y1 T) G- {# b* {2 d& N9 f7 O#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
) |. V5 e1 t) V t7 H# _0 K#define I(x, y, z) ((y) ^ ((x) | (~z)))
/ T; E5 k- p! g+ A7 }9 \
* t( ]4 ?6 B5 ~, Y0 R8 w6 z7 f8 I/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

% r% a$ N: `& V0 ^0 U8 C* j9 @/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation 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); \
}
#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
5 Q/ Y8 C' h4 O$ c; a& x$ g+ k#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
0 n/ h; L. W( o- O) {: C1 N- L#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
3 o" t1 n& v0 m' C
/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
1 h$ Y% y; r" l7 D6 G- j: _6 mvoid MD5Init (context)
MD5_CTX *context; /* context */
2 s$ w& d1 \2 u. ^' Y4 {1 g{
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;
}

/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
0 r8 u. y3 \( u+ SMD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
" D, N4 D" j. _: h7 j{
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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