md5加密算法C++程序

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#include "global.h"
. z7 ?: M. B7 Y5 b( @4 i#include "md5.h"

/* Constants for MD5Transform routine.
*/


, b7 Y7 K8 @) h. |+ n+ v#define S11 7
1 m2 \" @( B, _; e+ M+ l! o7 Z#define S12 12
#define S13 17
+ y4 x; m& H8 p) l$ }# s* d1 c#define S14 22
#define S21 5
#define S22 9
% {" L* L1 S) k#define S23 14
#define S24 20
! X. {7 {: c+ `! u! ]#define S31 4
#define S32 11
3 |0 ^! O" V9 @' B#define S33 16
/ T7 l2 [0 g9 }- f+ S9 T4 o#define S34 23
#define S41 6
) T# x( `' ?+ [( l" k; R#define S42 10
#define S43 15
+ {3 i; T& R1 @#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
( U- V* P" Y; \( j9 Ystatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
, x9 T; o8 {) Qstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
; u7 ]$ }; ~$ u6 wstatic 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
! J- q+ H8 l: o3 O& P; w5 d0 ]};
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/* F, G, H and I are basic MD5 functions.
*/
# [2 N$ u, {9 A# x ~) p/ H+ K#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
8 E( T* E4 a& T$ @" b! E#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

5 C' E$ K( u- k/ o/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
0 E2 @ P: H6 F) ~; a/ B/ A4 @
/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
( d+ J% g5 E' c: i" h#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
: P7 T' [. T7 f$ Y% f0 o# d# |#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
) c/ {+ M6 i' a" u# W* 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.
*/
void MD5Init (context)
: u- z2 ]4 J8 t( MMD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
, ?5 g# w3 M* O! c( Z5 Q*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
7 G2 W. c8 S5 R7 w}
5 G9 R+ K& u. x' K
3 j* m) _* q% X: q6 K7 N9 U& w/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
5 [, Y2 n5 d d6 D+ A2 M/ Q; jvoid MD5Update (context, input, inputLen)
9 U8 k5 K' u c! Y' sMD5_CTX *context; /* context */
2 W0 R m) V* I( f- Qunsigned char *input; /* input block */
, O# o1 R$ b% G- Lunsigned int inputLen; /* length of input block */
{
unsigned int i, index, partLen;
w1 H: l9 Y9 T ?% D+ [
/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
! n, Z' r; \8 d; R6 C. Z
/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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