md5加密算法C++程序

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#include "global.h"
3 L8 Y. E4 |" O- x! V/ Y! j3 a#include "md5.h"
5 B% b) a" F( N" g
/* Constants for MD5Transform routine.
*/


$ K5 n: {3 E {0 g#define S11 7
9 I4 L( g4 m1 I( M#define S12 12
) c: M/ }; l9 [0 p; C#define S13 17
, G, K6 V5 ~: ^* V& i& h#define S14 22
+ C5 N, p' h$ y/ Z0 L#define S21 5
#define S22 9
#define S23 14
1 z6 i+ _* s7 W% U k. Q2 L" R#define S24 20
4 q7 b% t1 o% [% t a1 s) Q- ]! }% p#define S31 4
8 }, M$ R7 q- y8 [! y9 r#define S32 11
2 D2 h6 z5 M6 {( E2 O2 q' G! u#define S33 16
#define S34 23
#define S41 6
#define S42 10
7 i8 d+ ^1 P. M6 _, c) P5 ^#define S43 15
6 `) m1 z( K+ B, ?#define S44 21
. {" y0 v, z$ F
static 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));
0 e- M6 J: c% tstatic 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
+ c2 g+ X4 }- P2 g3 b};
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/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
: ^+ Z' ]) ~+ e$ m5 Y e+ `9 P#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
+ @ V2 X. c+ o* P#define H(x, y, z) ((x) ^ (y) ^ (z))
; X8 U+ u- q& R2 Z, Z; B7 Z#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* ROTATE_LEFT rotates x left n bits.
*/
- E) Y) c& t6 u" o#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

' Q) M, I4 q$ S% p/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
* |5 j/ ~4 @( {& A1 P; R. ?0 S2 TRotation is separate from addition to prevent recomputation.
*/
" L! w+ L2 `8 V' j* q& O3 \#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
9 P) j( e/ ^: O: `# |4 s#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); \
}
' o2 `1 ?% {" Q) w6 [4 H8 |( m#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
/ B2 N: @7 B" F' E9 o1 l6 v
; O0 S" y5 Z( b; j% L) r/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
7 K. E# `+ L4 v* s: Avoid MD5Init (context)
MD5_CTX *context; /* context */
5 x+ u: Q' i8 V- h* N& \1 M{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
! @' Q9 C8 j) Y- x( x g+ O3 m*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
, }$ i* b3 u: n* A7 R% ~}
3 }/ `, c$ R. g6 p" B v3 t
. B/ |6 `% A/ F& T6 _) y/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
; }6 o6 h3 c' O7 c) v" {! H$ hvoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
. Z! f; H; s! U: U6 s d{
unsigned int i, index, partLen;
/ x% ~# ?4 i& n7 P9 e
/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
$ A L: o* I' X7 Z& K- |. [, u
/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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