3DES加密算法.docx
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3DES加密算法
packagecom.hqwl.util;
importjava.io.UnsupportedEncodingException;
/**
*
*/
publicclassTripDES
{
/**
****************************压缩替换S-Box***************************************
***********
*/
privatestaticfinalint[][]s1={{14,4,13,1,2,15,11,8,3,10,6,12,5,9,0,7},
{0,15,7,4,14,2,13,1,10,6,12,11,9,5,3,8},
{4,1,14,8,13,6,2,11,15,12,9,7,3,10,5,0},
{15,12,8,2,4,9,1,7,5,11,3,14,10,0,6,13}};
privatestaticfinalint[][]s2={{15,1,8,14,6,11,3,4,9,7,2,13,12,0,5,10},
{3,13,4,7,15,2,8,14,12,0,1,10,6,9,11,5},
{0,14,7,11,10,4,13,1,5,8,12,6,9,3,2,15},
{13,8,10,1,3,15,4,2,11,6,7,12,0,5,14,9}};
privatestaticfinalint[][]s3={{10,0,9,14,6,3,15,5,1,13,12,7,11,4,2,8},
{13,7,0,9,3,4,6,10,2,8,5,14,12,11,15,1},
{13,6,4,9,8,15,3,0,11,1,2,12,5,10,14,7},
{1,10,13,0,6,9,8,7,4,15,14,3,11,5,2,12}};
privatestaticfinalint[][]s4={
{7,13,14,3,0,6,9,10,1,2,8,5,11,12,4,15},
{13,8,11,5,6,15,0,3,4,7,2,12,1,10,14,9},//erorr
{10,6,9,0,12,11,7,13,15,1,3,14,5,2,8,4},
{3,15,0,6,10,1,13,8,9,4,5,11,12,7,2,14}};
privatestaticfinalint[][]s5={{2,12,4,1,7,10,11,6,8,5,3,15,13,0,14,9},
{14,11,2,12,4,7,13,1,5,0,15,10,3,9,8,6},
{4,2,1,11,10,13,7,8,15,9,12,5,6,3,0,14},
{11,8,12,7,1,14,2,13,6,15,0,9,10,4,5,3}};
privatestaticfinalint[][]s6={{12,1,10,15,9,2,6,8,0,13,3,4,14,7,5,11},
{10,15,4,2,7,12,9,5,6,1,13,14,0,11,3,8},
{9,14,15,5,2,8,12,3,7,0,4,10,1,13,11,6},
{4,3,2,12,9,5,15,10,11,14,1,7,6,0,8,13}};
privatestaticfinalint[][]s7={{4,11,2,14,15,0,8,13,3,12,9,7,5,10,6,1},
{13,0,11,7,4,9,1,10,14,3,5,12,2,15,8,6},
{1,4,11,13,12,3,7,14,10,15,6,8,0,5,9,2},
{6,11,13,8,1,4,10,7,9,5,0,15,14,2,3,12}};
privatestaticfinalint[][]s8={{13,2,8,4,6,15,11,1,10,9,3,14,5,0,12,7},
{1,15,13,8,10,3,7,4,12,5,6,11,0,14,9,2},
{7,11,4,1,9,12,14,2,0,6,10,13,15,3,5,8},
{2,1,14,7,4,10,8,13,15,12,9,0,3,5,6,11}};
privatestaticfinalint[]ip={58,50,42,34,26,18,10,2,60,52,44,36,28,20,12,4,62,54,46,
38,30,22,14,6,64,56,48,40,32,24,16,8,57,49,41,33,25,17,9,1,59,51,43,35,27,19,
11,3,61,53,45,37,29,21,13,5,63,55,47,39,31,23,15,7};
privatestaticfinalint[]_ip={40,8,48,16,56,24,64,32,39,7,47,15,55,23,63,31,38,6,46,
14,54,22,62,30,37,5,45,13,53,21,61,29,36,4,44,12,52,20,60,28,35,3,43,11,51,
19,59,27,34,2,42,10,50,18,58,26,33,1,41,9,49,17,57,25};
//每次密钥循环左移位数
privatestaticfinalint[]LS={1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};
privatestaticint[][]subKey=newint[16][48];
privatestaticintHEX=0;
privatestaticintASC=1;
/**
*将十六进制A--F转换成对应数
*@paramch
*@return
*@throwsException
*/
publicstaticintgetIntByChar(charch)throwsException
{
chart=Character.toUpperCase(ch);
inti=0;
switch(t)
{
case'0':
case'1':
case'2':
case'3':
case'4':
case'5':
case'6':
case'7':
case'8':
case'9':
i=Integer.parseInt(Character.toString(t));
break;
case'A':
i=10;
break;
case'B':
i=11;
break;
case'C':
i=12;
break;
case'D':
i=13;
break;
case'E':
i=14;
break;
case'F':
i=15;
break;
default:
thrownewException("getIntByCharwaswrong");
}
returni;
}
/**
*将字符串转换成二进制数组
*@paramsource:
16字节
*@return
*/
publicstaticint[]string2Binary(Stringsource)
{
intlen=source.length();
int[]dest=newint[len*4];
char[]arr=source.toCharArray();
for(inti=0;i{
intt=0;
try
{
t=getIntByChar(arr[i]);
//System.out.println(arr[i]);
}catch(Exceptione)
{
e.printStackTrace();
}
String[]str=Integer.toBinaryString(t).split("");
intk=i*4+3;
for(intj=str.length-1;j>0;j--)
{
dest[k]=Integer.parseInt(str[j]);
k--;
}
}
returndest;
}
/**
*返回x的y次方
*@paramx
*@paramy
*@return
*/
publicstaticintgetXY(intx,inty)
{
inttemp=x;
if(y==0)
x=1;
for(inti=2;i<=y;i++)
{
x*=temp;
}
returnx;
}
/**
*s位长度的二进制字符串
*@params
*@return
*/
publicstaticStringbinary2Hex(Strings)
{
intlen=s.length();
intresult=0;
intk=0;
if(len>4)
returnnull;
for(inti=len;i>0;i--)
{
result+=Integer.parseInt(s.substring(i-1,i))*getXY(2,k);
k++;
}
switch(result)
{
case0:
case1:
case2:
case3:
case4:
case5:
case6:
case7:
case8:
case9:
return""+result;
case10:
return"A";
case11:
return"B";
case12:
return"C";
case13:
return"D";
case14:
return"E";
case15:
return"F";
default:
returnnull;
}
}
/**
*将int转换成Hex
*@parami
*@return
*@throwsException
*/
publicstaticStringint2Hex(inti)
{
switch(i)
{
case0:
case1:
case2:
case3:
case4:
case5:
case6:
case7:
case8:
case9:
return""+i;
case10:
return"A";
case11:
return"B";
case12:
return"C";
case13:
return"D";
case14:
return"E";
case15:
return"F";
default:
returnnull;
}
}
/**
*将二进制字符串转换成十六进制字符
*@params
*@return
*/
publicstaticStringbinary2ASC(Strings)
{
Stringstr="";
intii=0;
intlen=s.length();
//不够4bit左补0
if(len%4!
=0)
{
while(ii<4-len%4)
{
s="0"+s;
}
}
for(inti=0;i{
str+=binary2Hex(s.substring(i*4,i*4+4));
}
returnstr;
}
/**
*IP初始置换
*@paramsource
*@return
*/
publicstaticint[]changeIP(int[]source)
{
int[]dest=newint[64];
for(inti=0;i<64;i++)
{
dest[i]=source[ip[i]-1];
}
returndest;
}
/**
*IP-1逆置
*@paramsource
*@return
*/
publicstaticint[]changeInverseIP(int[]source)
{
int[]dest=newint[64];
for(inti=0;i<64;i++)
{
dest[i]=source[_ip[i]-1];
}
returndest;
}
/**
*2bit扩展8bit
*@paramsource
*@return
*/
publicstaticint[]expend(int[]source)
{
int[]ret=newint[48];
int[]temp={32,1,2,3,4,5,4,5,6,7,8,9,8,9,10,11,12,13,12,13,14,15,16,17,16,17,
18,19,20,21,20,21,22,23,24,25,24,25,26,27,28,29,28,29,30,31,32,1};
for(inti=0;i<48;i++)
{
ret[i]=source[temp[i]-1];
}
returnret;
}
/**
*8bit压缩2bit
*@paramsource(48bit)
*@returnR(32bit)B=E(R)⊕K,将48位的B分成8个分组,B=B1B2B3B4B5B6B7B8
*/
publicstaticint[]press(int[]source)
{
int[]ret=newint[32];
int[][]temp=newint[8][6];
int[][][]s={s1,s2,s3,s4,s5,s6,s7,s8};
StringBufferstr=newStringBuffer();
for(inti=0;i<8;i++)
{
for(intj=0;j<6;j++)
{
temp[i][j]=source[i*6+j];
}
}
for(inti=0;i<8;i++)
{
//(16)
intx=temp[i][0]*2+temp[i][5];
//(2345)
inty=temp[i][1]*8+temp[i][2]*4+temp[i][3]*2+temp[i][4];
intval=s[i][x][y];
Stringch=int2Hex(val);
//System.out.println("x="+x+",y="+y+"-->"+ch);
//Stringch=Integer.toBinaryString(val);
str.append(ch);
}
//System.out.println(str.toString());
ret=string2Binary(str.toString());
//printArr(ret);
//置换P
ret=dataP(ret);
returnret;
}
/**
*置换P(32bit)
*@paramsource
*@return
*/
publicstaticint[]dataP(int[]source)
{
int[]dest=newint[32];
int[]temp={16,7,20,21,29,12,28,17,1,15,23,26,5,18,31,10,2,8,24,14,32,27,3,9,
19,13,30,6,22,11,4,25};
intlen=source.length;
for(inti=0;i{
dest[i]=source[temp[i]-1];
}
returndest;
}
/**
*@paramR(2bit)
*@paramK(48bit的轮子密
*@return32bit
*/
publicstaticint[]f(int[]R,int[]K)
{
int[]dest=newint[32];
int[]temp=newint[48];
//先将输入32bit扩展8bit
int[]expendR=expend(R);//48bit
//与轮子密钥进行异或运
temp=diffOr(expendR,K);
//压缩2bit
dest=press(temp);
//System.out.println("needpressdata----->");
//printArr(temp);
returndest;
}
/**
*两个等长的数组做异或
*@paramsource1
*@paramsource2
*@return
*/
publicstaticint[]diffOr(int[]source1,int[]source2)
{
intlen=source1.length;
int[]dest=newint[len];
for(inti=0;i{
dest[i]=source1[i]^source2[i];
}
returndest;
}
/**
*DES加密--->对称密钥D=Ln(32bit)+Rn(32bit)经过16轮置
*@paramD(16byte)明文
*@paramK(16byte)轮子密钥
*@return(16byte)密文
*/
publicstaticStringencryption(StringD,StringK)
{
Stringstr="";
int[]temp=newint[64];
int[]data=string2Binary(D);
//printArr(data);
//第一步初始置
data=changeIP(data);
//printArr(data);
int[][]left=newint[17][32];
int[][]right=newint[17][32];
for(intj=0;j<32;j++)
{
left[0][j]=data[j];
right[0][j]=data[j+32];
}
//printArr(left[0]);
//printArr(right[0]);
setKey(K);//subkeyok
for(inti=1;i<17;i++)
{
//获取(48bit)的轮子密
int[]key=subKey[i-1];
//L1=R0
left[i]=right[i-1];
//R1=L0^f(R0,K1)
int[]fTemp=f(right[i-1],key);//32bit
right[i]=diffOr(left[i-1],fTemp);
}
//组合的时候,左右调换**************************************************
for(inti=0;i<32;i++)
{
temp[i]=right[16][i];
temp[32+i]=left[16][i];
}
temp=changeInverseIP