blowfish.h

Blowfish加密算法加密

/************************************************************************
 
	Blowfish.h: interface for the CBlowfish class.

	Built under VC5.0

	Based on an article by Jason Wylie, [e-mail] from www.codeguru.com

	This code copyright 1998, Chris Losinger, Smaller Animals Software
	http://www.smalleranimals.com

	Usage :
	----------------------------------------------

   // initialize with our key 
	CBlowfish fugu((BYTE*)"EatMe", 5);

	// data len must be a multiple of 8 BYTEs!!!
	BYTE secrets[16];
	memset(secrets, 0, 16);

	// move our data into the encryption buffer
	strcpy((char *)secrets, "Secret Data");

	// swallow it.
	fugu.Encrypt(secrets, 16);

	// our data, she's disappeared!
	TRACE("%s\n", secrets);

   // quick, get our data back!
	fugu.Decrypt(secrets, 16);

	// ahh....
	TRACE("%s\n", secrets);
	----------------------------------------------

		Permission has been granted to copy and distribute this code in 
	any context, including a commercial application, provided that 
	this notice is present in user-accessible supporting documentation. 

	  This does not affect your ownership of the derived work itself, 
	and the intent is to assure proper credit for the original authors, not 
	to interfere with your productive use of this code. If you have questions,
	ask. "Derived works" includes all programs that utilize the class. 
	Credit must be given in user-accessible documentation. 

		Permission to use, copy, modify, and distribute this software and 
	its documentation for any purpose and without fee is hereby granted, 
	provided that the above copyright notice appear in all copies and that 
	both that copyright notice and this permission notice appear in supporting
	documentation. This software is provided "as is" without express or 
	implied warranty. 

************************************************************************/

#ifndef BLOWFH
#define BLOWFH

////////////////////////////////////////////////////////////////
/* P-box P-array, S-box  */

#define S(x,i) (bf_S[i][x.w.byte##i])
#define bf_F(x) (((S(x,0) + S(x,1)) ^ S(x,2)) + S(x,3))
#define ROUND(a,b,n) (a.word ^= bf_F(b) ^ bf_P[n])
#define bf_N             16

////////////////////////////////////////////////////////////////
//

union aword 
{
  DWORD word;
  BYTE byte [4];
  struct 
  {
    unsigned int byte3:8;
    unsigned int byte2:8;
    unsigned int byte1:8;
    unsigned int byte0:8;
  } w;
};

////////////////////////////////////////////////////////////////
//

class CBlowfish
{
public:
	CBlowfish(BYTE *pKey, short keybytes);
	~CBlowfish() {};

	// dwDataLen must be a multiple of 8 BYTEs
	BOOL Encrypt(BYTE *pData, DWORD dwDataLen);

	// dwDataLen must be a multiple of 8 BYTEs
	BOOL Decrypt(BYTE *pData, DWORD dwDataLen);

protected:
	void Blowfish_encipher(DWORD *xl, DWORD *xr);
	void Blowfish_decipher(DWORD *xl, DWORD *xr);

	void InitializeBlowfish(BYTE *pKey, short keybytes);

protected:
	DWORD F(DWORD x);
	DWORD bf_P[bf_N + 2];
	DWORD bf_S[4][256];
};

////////////////////////////////////////////////////////////////
// defaults
static const DWORD def_bf_P[bf_N + 2] = 
{
  0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344,
  0xa4093822, 0x299f31d0, 0x082efa98, 0xec4e6c89,
  0x452821e6, 0x38d01377, 0xbe5466cf, 0x34e90c6c,
  0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5, 0xb5470917,
  0x9216d5d9, 0x8979fb1b,
};

////////////////////////////////////////////////////////////////
// defaults
static const DWORD def_bf_S[4][256] = 
{
  0xd1310ba6, 0x98dfb5ac, 0x2ffd72db, 0xd01adfb7, 
  0xb8e1afed, 0x6a267e96, 0xba7c9045, 0xf12c7f99, 
  0x24a19947, 0xb3916cf7, 0x0801f2e2, 0x858efc16, 
  0x636920d8, 0x71574e69, 0xa458fea3, 0xf4933d7e, 
  0x0d95748f, 0x728eb658, 0x718bcd58, 0x82154aee, 
  0x7b54a41d, 0xc25a59b5, 0x9c30d539, 0x2af26013, 
  0xc5d1b023, 0x286085f0, 0xca417918, 0xb8db38ef, 
  0x8e79dcb0, 0x603a180e, 0x6c9e0e8b, 0xb01e8a3e, 
  0xd71577c1, 0xbd314b27, 0x78af2fda, 0x55605c60, 
  0xe65525f3, 0xaa55ab94, 0x57489862, 0x63e81440, 
  0x55ca396a, 0x2aab10b6, 0xb4cc5c34, 0x1141e8ce, 
  0xa15486af, 0x7c72e993, 0xb3ee1411, 0x636fbc2a, 
  0x2ba9c55d, 0x741831f6, 0xce5c3e16, 0x9b87931e, 
  0xafd6ba33, 0x6c24cf5c, 0x7a325381, 0x28958677, 
  0x3b8f4898, 0x6b4bb9af, 0xc4bfe81b, 0x66282193, 
  0x61d809cc, 0xfb21a991, 0x487cac60, 0x5dec8032, 
  0xef845d5d, 0xe98575b1, 0xdc262302, 0xeb651b88, 
  0x23893e81, 0xd396acc5, 0x0f6d6ff3, 0x83f44239, 
  0x2e0b4482, 0xa4842004, 0x69c8f04a, 0x9e1f9b5e, 
  0x21c66842, 0xf6e96c9a, 0x670c9c61, 0xabd388f0, 
  0x6a51a0d2, 0xd8542f68, 0x960fa728, 0xab5133a3, 
  0x6eef0b6c, 0x137a3be4, 0xba3bf050, 0x7efb2a98, 
  0xa1f1651d, 0x39af0176, 0x66ca593e, 0x82430e88, 
  0x8cee8619, 0x456f9fb4, 0x7d84a5c3, 0x3b8b5ebe, 
  0xe06f75d8, 0x85c12073, 0x401a449f, 0x56c16aa6, 
  0x4ed3aa62, 0x363f7706, 0x1bfedf72, 0x429b023d, 
  0x37d0d724, 0xd00a1248, 0xdb0fead3, 0x49f1c09b, 
  0x075372c9, 0x80991b7b, 0x25d479d8, 0xf6e8def7, 
  0xe3fe501a, 0xb6794c3b, 0x976ce0bd, 0x04c006ba, 
  0xc1a94fb6, 0x409f60c4, 0x5e5c9ec2, 0x196a2463, 
  0x68fb6faf, 0x3e6c53b5, 0x1339b2eb, 0x3b52ec6f, 
  0x6dfc511f, 0x9b30952c, 0xcc814544, 0xaf5ebd09, 
  0xbee3d004, 0xde334afd, 0x660f2807, 0x192e4bb3, 
  0xc0cba857, 0x45c8740f, 0xd20b5f39, 0xb9d3fbdb, 
  0x5579c0bd, 0x1a60320a, 0xd6a100c6, 0x402c7279, 
  0x679f25fe, 0xfb1fa3cc, 0x8ea5e9f8, 0xdb3222f8, 
  0x3c7516df, 0xfd616b15, 0x2f501ec8, 0xad0552ab, 
  0x323db5fa, 0xfd238760, 0x53317b48, 0x3e00df82, 
  0x9e5c57bb, 0xca6f8ca0, 0x1a87562e, 0xdf1769db, 
  0xd542a8f6, 0x287effc3, 0xac6732c6, 0x8c4f5573, 
  0x695b27b0, 0xbbca58c8, 0xe1ffa35d, 0xb8f011a0, 
  0x10fa3d98, 0xfd2183b8, 0x4afcb56c, 0x2dd1d35b, 
  0x9a53e479, 0xb6f84565, 0xd28e49bc, 0x4bfb9790, 
  0xe1ddf2da, 0xa4cb7e33, 0x62fb1341, 0xcee4c6e8, 
  0xef20cada, 0x36774c01, 0xd07e9efe, 0x2bf11fb4, 
  0x95dbda4d, 0xae909198, 0xeaad8e71, 0x6b93d5a0, 
  0xd08ed1d0, 0xafc725e0, 0x8e3c5b2f, 0x8e7594b7, 
  0x8ff6e2fb, 0xf2122b64, 0x8888b812, 0x900df01c, 
  0x4fad5ea0, 0x688fc31c, 0xd1cff191, 0xb3a8c1ad, 
  0x2f2f2218, 0xbe0e1777, 0xea752dfe, 0x8b021fa1, 
  0xe5a0cc0f, 0xb56f74e8, 0x18acf3d6, 0xce89e299, 
  0xb4a84fe0, 0xfd13e0b7, 0x7cc43b81, 0xd2ada8d9, 
  0x165fa266, 0x80957705, 0x93cc7314, 0x211a1477, 
  0xe6ad2065, 0x77b5fa86, 0xc75442f5, 0xfb9d35cf, 
  0xebcdaf0c, 0x7b3e89a0, 0xd6411bd3, 0xae1e7e49, 
  0x00250e2d, 0x2071b35e, 0x226800bb, 0x57b8e0af, 
  0x2464369b, 0xf009b91e, 0x5563911d, 0x59dfa6aa, 
  0x78c14389, 0xd95a537f, 0x207d5ba2, 0x02e5b9c5, 
  0x83260376, 0x6295cfa9, 0x11c81968, 0x4e734a41, 
  0xb3472dca, 0x7b14a94a, 0x1b510052, 0x9a532915, 
  0xd60f573f, 0xbc9bc6e4, 0x2b60a476, 0x81e67400, 
  0x08ba6fb5, 0x571be91f, 0xf296ec6b, 0x2a0dd915, 
  0xb6636521, 0xe7b9f9b6, 0xff34052e, 0xc5855664, 
  0x53b02d5d, 0xa99f8fa1, 0x08ba4799, 0x6e85076a, 
  0x4b7a70e9, 0xb5b32944, 0xdb75092e, 0xc4192623, 
  0xad6ea6b0, 0x49a7df7d, 0x9cee60b8, 0x8fedb266, 
  0xecaa8c71, 0x699a17ff, 0x5664526c, 0xc2b19ee1,