md5加密算法C++程序

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#include "global.h"
3 O7 R4 R$ T; N#include "md5.h"
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6 V/ y7 L+ T \% T u, Z8 A$ u4 J7 j/* Constants for MD5Transform routine.
*/
% z9 v; O* @6 U" ?$ D

#define S11 7
* q. \- i" ~+ D4 H8 J: u* X#define S12 12
7 @& Q# J8 l$ g3 Y: r6 U#define S13 17
, Z# ?( {) \ E* g: N! S#define S14 22
#define S21 5
' f8 B7 Y4 k8 X+ F p5 `% [ e#define S22 9
#define S23 14
#define S24 20
#define S31 4
#define S32 11
#define S33 16
6 f# v. U1 }+ j#define S34 23
/ I+ U$ r+ D; q) L/ l) e! X& s+ X8 Y$ i#define S41 6
* M7 G: f- l! H+ w. Y#define S42 10
$ G+ ~# R7 W& z, J#define S43 15
3 B( |6 p8 `$ o s+ s#define S44 21

; U [2 |; C: W" l( n+ `# xstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
/ ]; H- b1 o6 z. b0 d" V" wstatic 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
! n8 V( C- Q# G7 u" ?};
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/* F, G, H and I are basic MD5 functions.
*/
% T1 X- h" b. _- H#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
! K) ]* F9 y4 [( s. i3 A1 q" l5 l#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
7 ~- g8 W; W' B' q1 D$ @#define H(x, y, z) ((x) ^ (y) ^ (z))
0 e6 A$ X( g, e$ C% v2 l0 Z#define I(x, y, z) ((y) ^ ((x) | (~z)))
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/* ROTATE_LEFT rotates x left n bits.
*/
" C9 l X, z* ~#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
! ]& f/ r2 q, c9 F' {5 ~4 VRotation is separate from addition to prevent recomputation.
*/
6 h/ a, O! C, {- @5 G#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); \
}

/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
) J$ g6 R* c" i: p' Uvoid MD5Init (context)
MD5_CTX *context; /* context */
& v3 o( x# r. _, C/ v/ n{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
0 W4 n0 ^3 s* }2 b1 O# ?1 F6 G*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}

: T) {0 [3 Y/ \. p" F3 w/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
1 t- ?: }, m. I: Wvoid MD5Update (context, input, inputLen)
) ^ O9 V/ v5 R+ y) AMD5_CTX *context; /* context */
' E+ Y; P6 O5 K1 Punsigned char *input; /* input block */
5 P* o# t; b5 y' b) p3 D9 bunsigned int inputLen; /* length of input block */
: ]- v4 R$ H: d, ? T: U' u5 k{
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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