blowfish.cpp

blowfish加密算法的编码类

		0xa8b6e37e, 0xc3293d46, 0x48de5369, 0x6413e680, 0xa2ae0810, 0xdd6db224, 0x69852dfd, 0x09072166, 
		0xb39a460a, 0x6445c0dd, 0x586cdecf, 0x1c20c8ae, 0x5bbef7dd, 0x1b588d40, 0xccd2017f, 0x6bb4e3bb, 
		0xdda26a7e, 0x3a59ff45, 0x3e350a44, 0xbcb4cdd5, 0x72eacea8, 0xfa6484bb, 0x8d6612ae, 0xbf3c6f47, 
		0xd29be463, 0x542f5d9e, 0xaec2771b, 0xf64e6370, 0x740e0d8d, 0xe75b1357, 0xf8721671, 0xaf537d5d, 
		0x4040cb08, 0x4eb4e2cc, 0x34d2466a, 0x0115af84, 0xe1b00428, 0x95983a1d, 0x06b89fb4, 0xce6ea048, 
		0x6f3f3b82, 0x3520ab82, 0x011a1d4b, 0x277227f8, 0x611560b1, 0xe7933fdc, 0xbb3a792b, 0x344525bd, 
		0xa08839e1, 0x51ce794b, 0x2f32c9b7, 0xa01fbac9, 0xe01cc87e, 0xbcc7d1f6, 0xcf0111c3, 0xa1e8aac7, 
		0x1a908749, 0xd44fbd9a, 0xd0dadecb, 0xd50ada38, 0x0339c32a, 0xc6913667, 0x8df9317c, 0xe0b12b4f, 
		0xf79e59b7, 0x43f5bb3a, 0xf2d519ff, 0x27d9459c, 0xbf97222c, 0x15e6fc2a, 0x0f91fc71, 0x9b941525, 
		0xfae59361, 0xceb69ceb, 0xc2a86459, 0x12baa8d1, 0xb6c1075e, 0xe3056a0c, 0x10d25065, 0xcb03a442, 
		0xe0ec6e0e, 0x1698db3b, 0x4c98a0be, 0x3278e964, 0x9f1f9532, 0xe0d392df, 0xd3a0342b, 0x8971f21e, 
		0x1b0a7441, 0x4ba3348c, 0xc5be7120, 0xc37632d8, 0xdf359f8d, 0x9b992f2e, 0xe60b6f47, 0x0fe3f11d, 
		0xe54cda54, 0x1edad891, 0xce6279cf, 0xcd3e7e6f, 0x1618b166, 0xfd2c1d05, 0x848fd2c5, 0xf6fb2299, 
		0xf523f357, 0xa6327623, 0x93a83531, 0x56cccd02, 0xacf08162, 0x5a75ebb5, 0x6e163697, 0x88d273cc, 
		0xde966292, 0x81b949d0, 0x4c50901b, 0x71c65614, 0xe6c6c7bd, 0x327a140a, 0x45e1d006, 0xc3f27b9a, 
		0xc9aa53fd, 0x62a80f00, 0xbb25bfe2, 0x35bdd2f6, 0x71126905, 0xb2040222, 0xb6cbcf7c, 0xcd769c2b, 
		0x53113ec0, 0x1640e3d3, 0x38abbd60, 0x2547adf0, 0xba38209c, 0xf746ce76, 0x77afa1c5, 0x20756060, 
		0x85cbfe4e, 0x8ae88dd8, 0x7aaaf9b0, 0x4cf9aa7e, 0x1948c25c, 0x02fb8a8c, 0x01c36ae4, 0xd6ebe1f9, 
		0x90d4f869, 0xa65cdea0, 0x3f09252d, 0xc208e69f, 0xb74e6132, 0xce77e25b, 0x578fdfe3, 0x3ac372e6
	}
};
const unsigned long CBlowfish::pbox[18]=
{
	0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344, 0xa4093822, 0x299f31d0, 0x082efa98, 0xec4e6c89, 
	0x452821e6, 0x38d01377, 0xbe5466cf, 0x34e90c6c, 0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5, 0xb5470917, 
	0x9216d5d9, 0x8979fb1b
};
CBlowfish::CBlowfish()
{

}

CBlowfish::~CBlowfish()
{

}

void CBlowfish::BlowfishKeyInit(const char *szKey, int nStrLen)
{
	memcpy(keybox,pbox,sizeof(long)*18);
	memcpy(keybox+18,sbox,sizeof(long)*256*4);
	int oldlen=nStrLen,i;
	char szkey[72*2],*cp;
	memset(szkey,0,72*2);
	if(nStrLen<72)
	{
		nStrLen=0;
		while(nStrLen<72)
		{
			strcat(szkey,szKey);
			nStrLen+=oldlen;
		}
	}
	else 
		strncpy(szkey,szKey,72);
	cp=szkey;
	unsigned long* pKey=(unsigned long*)cp;
	for (i=0;i<18;i++)
		keybox[i]^=pKey[i];
	unsigned long xl=0,xr=0;
	for (i=0;i<521;i++)
	{
		BlowfishEn(xl,xr);
		keybox[2*i]=xl;
		keybox[2*i+1]=xr;
	}
}

void CBlowfish::BlowfishEn(unsigned long &XL, unsigned long &XR)
{
	unsigned long xl=XL,xr=XR,temp;
	int i;
	for (i=0;i<16;i++)
	{
		xl^=keybox[i];
		xr^=F((const char*)&xl);
		swap(xl,xr,temp);
	}
	swap(xl,xr,temp);
	xr^=keybox[16];
	xl^=keybox[17];
	XL=xl;
	XR=xr;
}

void CBlowfish::BlowfishDe(unsigned long &XL, unsigned long &XR)
{
	unsigned long xl=XL,xr=XR,temp;
	int i;
	for (i=17;i>1;i--)
	{
		xl^=keybox[i];
		xr^=F((const char*)&xl);
		swap(xl,xr,temp);
	}
	swap(xl,xr,temp);
	xr^=keybox[1];
	xl^=keybox[0];
	XL=xl;
	XR=xr;
}

void CBlowfish::Blowfish(char *szMessage, char type)
{
	int len=strlen(szMessage);
	int i;
	unsigned long* pul=NULL;
	if(type=='e')
	{
		while(len%8!=0)szMessage[len++]=0;
		for (i=0;i<len;i+=8)
			BlowfishEn((unsigned long&)szMessage[i],(unsigned long&)szMessage[i+4]);
	}
	else 
	{
		for (i=0;i<len;i+=8)
			BlowfishDe((unsigned long&)szMessage[i],(unsigned long&)szMessage[i+4]);
	}
}

unsigned long CBlowfish::F(const char index[])
{
	unsigned long temp;
	temp=keybox[SBOX_BEGIN+index[3]]+keybox[SBOX_BEGIN+256+index[2]];
	temp^=keybox[SBOX_BEGIN+256*2+index[1]];
	temp+=keybox[SBOX_BEGIN+256*3+index[0]];
	return temp;
}