hcs301 c语言解码程序,真正的HCS301(滚动码)解码C代码(已经通过测试)

资料介绍

#definebitcheck8(var,bit)(var((u1t)1(bit)))

u1thcs301Key[8]={0xef,0xcd,0xab,0x89,0x67,0x45,0x23,0x01};/*hcs301Key[0]是低字节*/

u1thcs301Hop[4]={0x5a,0xa5,0x5a,0xa5,};/*32位加密部分,hcs301Hop[0]是低字节*/

staticvoidHcs301Decrypt()

{

u1tcnt1;

u1tcnt0;

u1tmask;

u1ttem;

u1tcarry;

u1tcarry2;

u1ti;

for(cnt1=11+1;cnt1>0;cnt1--)

{

for(cnt0=48;cnt0>0;cnt0--)

{

if((cnt1^0x01)>0)

{

if(bitcheck8(hcs301Hop[2],3)==0)

{

mask=0x01;

}

else

{

mask=0x10;

}

if(bitcheck8(hcs301Hop[1],0)>0)

{

mask=2;

}

if(bitcheck8(hcs301Hop[0],0)>0)

{

mask=1;

}

tem=0x2e;

if(bitcheck8(hcs301Hop[3],1)>0)

{

tem=0x74;

if(bitcheck8(hcs301Hop[3],6)>0)

{

tem=0x3a;

}

}

else

{

if(bitcheck8(hcs301Hop[3],6)>0)

{

tem=0x5c;

}

}

mask=tem;

tem=0;

if(mask>0)

{

tem=0x80;

}

tem^=hcs301Hop[1];

tem^=hcs301Hop[3];

tem^=hcs301Key[1];

mask=tem;

carry=0x00;

if(bitcheck8(mask,7)>0)

{

carry=0x01;

}

mask=1;

for(i=0;i4;i++)

{

carry2=0x00;

if(bitcheck8(hcs301Hop[i],7)>0)

{

carry2=0x01;

}

hcs301Hop[i]=1;

hcs301Hop[i]|=carry;

carry=carry2;

}

}

//ROTATE_KEY

carry=0;

if(bitcheck8(hcs301Key[7],7)>0)

{

carry=0x01;

}

for(i=0;i8;i++)

{

carry2=0x00;

if(bitcheck8(hcs301Key[i],7)>0)

{

carry2=0x01;

}

hcs301Key[i]=1;

hcs301Key[i]|=carry;

carry=carry2;

}

}

}

}……