md5加密算法C++程序

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#include "global.h"
' B5 D9 ]+ g+ t/ I0 e( [#include "md5.h"

% i+ g" [ R% T* s9 `7 Z/* Constants for MD5Transform routine.
*/

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8 }9 G( k" K8 k#define S11 7
/ _9 O( D1 h$ W# j3 ?. V" Z#define S12 12
: X# p$ F0 x3 J3 @#define S13 17
2 W: b$ t7 _& t! |9 i1 ~' H#define S14 22
; t+ I$ S5 o7 f9 @0 b/ n#define S21 5
5 K4 z' p3 s+ G( p9 C8 x6 H#define S22 9
3 G$ n, b1 _" I1 o2 [; u0 {& A#define S23 14
#define S24 20
#define S31 4
2 u* {+ B: T4 V4 u#define S32 11
; t+ T$ l- L1 P( t7 }0 Z#define S33 16
+ s6 H" {; ^! G% {#define S34 23
( \' A4 z9 t9 R#define S41 6
& d3 r+ V% X8 G: C1 u% Q2 [#define S42 10
#define S43 15
/ }3 }* X$ G1 W( r9 I#define S44 21

0 Y9 B7 Z q% s. Bstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
& M {8 F; d5 Wstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
1 i% n1 C$ |( y/ c* E5 v6 r- ^static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
, Y% Y( M) A9 ]static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
' I5 R$ H% J) }' k# B/ Y! b5 ]4 F
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 P) g2 }% A$ b: V2 \ d};

/* F, G, H and I are basic MD5 functions.
*/
' i; B. X0 t0 h* c* W! } g, V+ _#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
$ C1 Z" ?- R# O" d. @! G9 a#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (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))))

. S2 N6 s4 r% l l% P9 O/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
9 `! ^8 |& d; j u8 URotation is separate from addition to prevent recomputation.
*/
0 @ r; x, j- _. 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); \
}
( c1 o1 \4 _# G/ a# D9 r, B$ 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); \
}
, }: o9 v' L W' i#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)
) a6 @$ f& m" G& P) \% G4 p' s0 M* bMD5_CTX *context; /* context */
- Q( }! D" u' c2 c" J5 U% b{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
3 t8 t2 \8 Z# K% r* F# b*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}
; v9 @/ r* [+ _% q
/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
4 G6 P4 e3 u4 e! x8 r4 k( |void MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
0 Y0 T4 F1 U+ S( l& E, iunsigned char *input; /* input block */
; Q# g) \5 J0 ^2 M) H! A# A$ ?unsigned int inputLen; /* length of input block */
+ W& c/ u& o; x e{
unsigned int i, index, partLen;
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/* 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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