java中的DES TripleDES和AES128代码
我写了下面的代码，用JAVA用三种算法对一些字节进行加密和解密，但我不知道我写的是否正确 谢谢和问候 头等舱：java中的DES TripleDES和AES128代码,java,cryptography,Java,Cryptography,我写了下面的代码，用JAVA用三种算法对一些字节进行加密和解密，但我不知道我写的是否正确 谢谢和问候 头等舱： public class Cryptography { Cryptography() {} public byte[] Encryption_AES128(byte[] plain , byte[] key) throws Exception { AES128 aes128 = new AES128(); return ae
public class Cryptography
{
Cryptography() {}
public byte[] Encryption_AES128(byte[] plain , byte[] key) throws Exception
{
AES128 aes128 = new AES128();
return aes128.encrypt(key, plain);
}
public byte[] Decryption_AES128(byte[] cipher , byte[] key) throws Exception
{
AES128 aes128 = new AES128();
return aes128.decrypt(key, cipher);
}
public byte[] Encryption_DES(byte[] plain , byte[] key) throws Exception
{
DES des = new DES(key);
return des.encrypt(plain);
}
public byte[] Decryption_DES(byte[] cipher , byte[] key) throws Exception
{
DES des = new DES(key);
return des.decrypt(cipher);
}
public byte[] Encryption_TripleDES(byte[] plain , byte[] key) throws Exception
{
TripleDES Tdes = new TripleDES(key);
return Tdes.encrypt(plain);
}
public byte[] Decryption_TripleDES(byte[] cipher , byte[] key) throws Exception
{
TripleDES Tdes = new TripleDES(key);
return Tdes.decrypt(cipher);
}
}
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;
public class TripleDES
{
SecretKey key;
TripleDES(byte [] rawkey) throws Exception
{
key = readKey(rawkey);
}
public SecretKey readKey(byte[] rawkey) throws Exception
{
DESedeKeySpec keyspec = new DESedeKeySpec(rawkey);
SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("DESede");
SecretKey key = keyfactory.generateSecret(keyspec);
return key;
}
public byte[] encrypt(byte[] plain ) throws Exception
{
Cipher cipher = Cipher.getInstance("DESede");
cipher.init(Cipher.ENCRYPT_MODE, key);
byte[] encrypted = cipher.doFinal(plain);
return encrypted;
}
public byte[] decrypt(byte[] cipher ) throws Exception
{
Cipher dcipher = Cipher.getInstance("DESede");
dcipher.init(Cipher.DECRYPT_MODE, key);
byte[] decrypted = dcipher.doFinal(cipher);
return decrypted;
}
}
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
public class DES
{
SecretKey key;
DES(byte [] KEY) throws Exception
{
key = readKey(KEY);
}
public SecretKey readKey(byte[] rawkey) throws Exception
{
DESKeySpec keyspec = new DESKeySpec(rawkey);
SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("DES");
SecretKey key = keyfactory.generateSecret(keyspec);
return key;
}
public byte[] encrypt(byte[] plain ) throws Exception
{
Cipher cipher = Cipher.getInstance("DES");
cipher.init(Cipher.ENCRYPT_MODE, key);
byte[] encrypted = cipher.doFinal(plain);
return encrypted;
}
public byte[] decrypt(byte[] cipher ) throws Exception
{
Cipher dcipher = Cipher.getInstance("DES");
dcipher.init(Cipher.DECRYPT_MODE, key);
byte[] decrypted = dcipher.doFinal(cipher);
return decrypted;
}
}
import java.security.SecureRandom;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
public class AES128
{
private byte[] getRawKey(byte[] seed) throws Exception
{
KeyGenerator kgen = KeyGenerator.getInstance("AES");
SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
sr.setSeed(seed);
kgen.init(128, sr); // 192 and 256 bits may not be available
SecretKey skey = kgen.generateKey();
byte[] raw = skey.getEncoded();
return raw;
}
public byte[] encrypt(byte[] raw, byte[] clear) throws Exception
{
SecretKeySpec skeySpec = new SecretKeySpec(getRawKey(raw), "AES");
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
byte[] encrypted = cipher.doFinal(clear);
return encrypted;
}
public byte[] decrypt(byte[] raw, byte[] encrypted) throws Exception
{
SecretKeySpec skeySpec = new SecretKeySpec(getRawKey(raw), "AES");
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.DECRYPT_MODE, skeySpec);
byte[] decrypted = cipher.doFinal(encrypted);
return decrypted;
}
}
要检查代码，您需要根据已知答案进行测试。这些已知答案称为“测试向量”。谷歌搜索将为您提供DES、3DES和AES的测试向量。这三种算法都是常用的。使用字符串（无api）在java中模拟des-3des：
公共类Filippakoc_Des{
静态int[]sb1={
{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}
};
静态int[]sb2={
{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}
};
静态int[]sb3={
{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}
};
静态int[]sb4={
{ 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},
{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}
};
静态int[]sb5={
{ 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}
};
静态int[]sb6={
{ 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, 12, 12, 9, 5, 15, 10,11, 14, 1, 7, 6, 0, 8, 13}
};
静态int[]sb7={
{ 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}
};
静态int[]sb8={
{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}
};
公共字符串Filippakoc_Des（字符串ptxt、字符串键、布尔值encdes）{
//字符串a=String.format（“%64s”，Integer.toBinaryString（255））.replace（“”，'0'）；
//字符串b=“1011011111001100001110000101110111000001001100110101101111101001010”；
字符串ipa=ippermutate（ptxt）；
字符串ipb=IPpermutate（ptxt）；
字符串[]键=键生成（键）；
字符串[]轮数=新字符串[16]；
字符串：text=“”；
如果（encdes==true）{
对于（int i=0；i14）{
四舍五入[i]=dround（ipb，键[i]）；
}否则{
轮[i]=dround（轮[i+1]，键[i]）；
}
}
scripttext=IPpermutation_389;（四舍五入[0]）；
//System.out.println（ptxt）；
//System.out.println（脚本文本）；
}
返回文本；
//字符串a=String.format（“%32s”，Integer.toBinaryString（255））.replace（“”，'0'）；
//字符串b=String.format（“%48s”，Integer.toBinaryString（21））.replace（“”，'0'）；
//System.out.println（函数f（a，b））；
//系统输出println（xor（a，b））；
}
公共字符串FilipPakocu 3des（字符串ptxt、字符串key1、字符串key2、字符串key3、布尔encdes）{
字符串En=“”；
如果（encdes）{
En=Filippakoc_Des（ptxt，键1，真）；
En=En=Filippakoc_Des（En，键2，假）；
En=En=Filippakoc_Des（En，键3，真）；
}否则{
En=Filippakoc_Des（文本，键1，假）；
En=En=Filippakoc_Des（En，键2，真）；
En=En=Filippakoc_Des（En，键3，假）；
}
返回En；
}
公共字符串圆形（字符串plain64，字符串keyi）{
字符串li=plain64.子字符串（0,32）；
字符串ri=64。子字符串（32）；
字符串ro=xor（li，functionf（ri，keyi））；
字符串lo=ri；
字符串结果命令=lo+ro；
返回结果命令；
}
公共字符串drond（字符串plain64，字符串keyi）{
字符串li=plain64.子字符串（0,32）；
字符串ri=64。子字符串（32）；
字符串lo=xor（ri，functionf（li，keyi））；
字符串ro=li；
字符串结果命令=lo+ro；
返回结果命令；
}
公共字符串异或（字符串a、字符串b）{
字符串res=“”；
对于（int i=0；它应该在代码审阅中。@马特：对不起……它在哪里？我是新来的。在最顶端，如果您单击它，将出现一个下拉框。然后您可以单击所有站点并向下滚动，直到看到代码审阅。
public class Filippakoc_Des {
static int[][] sb1={
{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}
};
static int[][] sb2={
{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}
};
static int[][] sb3={
{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}
};
static int[][] sb4={
{ 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},
{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}
};
static int[][] sb5={
{ 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}
};
static int[][] sb6={
{ 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, 12, 12, 9, 5, 15, 10,11, 14, 1, 7, 6, 0, 8, 13}
};
static int[][] sb7={
{ 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}
};
static int[][] sb8={
{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}
};
public String Filippakoc_Des(String ptxt,String key,boolean encdes){
//String a=String.format("%64s", Integer.toBinaryString(255)).replace(' ', '0');
//String b="1011011111001001100001110000101110110000010001110101111101001010";
String ipa=IPpermutation(ptxt);
String ipb=IPpermutation(ptxt);
String[] keys=Keygenerate(key);
String[] rounds=new String[16];
String cripttext="";
if(encdes==true){
for(int i=0;i<rounds.length;i++){
if(i<1){
rounds[i]=round(ipa,keys[i]);
}else{
rounds[i]=round(rounds[i-1],keys[i]);
}
}
cripttext=IPpermutation_(rounds[15]);
//System.out.println(ptxt);
//System.out.println(cripttext);
}else{
for(int i=rounds.length-1;i>=0;i--){
if(i>14){
rounds[i]=dround(ipb,keys[i]);
}else{
rounds[i]=dround(rounds[i+1],keys[i]);
}
}
cripttext=IPpermutation_(rounds[0]);
//System.out.println(ptxt);
//System.out.println(cripttext);
}
return cripttext;
//String a=String.format("%32s", Integer.toBinaryString(255)).replace(' ', '0');
//String b=String.format("%48s", Integer.toBinaryString(21)).replace(' ', '0');
//System.out.println(functionf(a, b));
//System.out.println(xor(a,b));
}
public String Filippakoc_3des(String ptxt,String key1,String key2,String key3,boolean encdes){
String En="";
if(encdes){
En=Filippakoc_Des(ptxt, key1, true);
En=En=Filippakoc_Des(En, key2, false);
En=En=Filippakoc_Des(En, key3, true);
}else{
En=Filippakoc_Des(ptxt, key1, false);
En=En=Filippakoc_Des(En, key2, true);
En=En=Filippakoc_Des(En, key3, false);
}
return En;
}
public String round(String plain64,String keyi){
String li=plain64.substring(0,32);
String ri=plain64.substring(32);
String ro=xor(li,functionf(ri,keyi));
String lo=ri;
String resultround=lo+ro;
return resultround;
}
public String dround(String plain64,String keyi){
String li=plain64.substring(0,32);
String ri=plain64.substring(32);
String lo=xor(ri,functionf(li,keyi));
String ro=li;
String resultround=lo+ro;
return resultround;
}
public String xor(String a,String b){
String res="";
for(int i=0;i<a.length();i++){
if(a.charAt(i)=='0' && b.charAt(i)=='0'){
res+='0';
}else if(a.charAt(i)=='0' && b.charAt(i)=='1'){
res+='1';
}else if(a.charAt(i)=='1' && b.charAt(i)=='0'){
res+='1';
}else if(a.charAt(i)=='1' && b.charAt(i)=='1'){
res+='0';
}
}
return res;
}
public String sboxesrtn(int ff){
String sb=Integer.toBinaryString(ff);
if(ff<2){
sb="000"+sb;
}else if(ff<4){
sb="00"+sb;
}else if(ff<8){
sb="0"+sb;
}
return sb;
}
public String functionf(String r32,String k48){
String r48=Epermutation(r32);
String xorout=xor(r48, k48);
String[] splitto6=new String[8];
splitto6[0]=xorout.substring(0,6);
splitto6[1]=xorout.substring(6,12);
splitto6[2]=xorout.substring(12,18);
splitto6[3]=xorout.substring(18,24);
splitto6[4]=xorout.substring(24,30);
splitto6[5]=xorout.substring(30,36);
splitto6[6]=xorout.substring(36,42);
splitto6[7]=xorout.substring(42);
String rnew32="";
String row;
String column="";
for(int i=0;i<splitto6.length;i++){
row=""+splitto6[i].charAt(0)+splitto6[i].charAt(5);
column=splitto6[i].substring(1,5);
//System.out.println(splitto6[i]+" "+row+" "+column);
int irow=Integer.parseInt(row, 2);
int icolumn=Integer.parseInt(column, 2);
if(i==0){
//rnew32+=Integer.toBinaryString(sb1[irow][icolumn]);
rnew32+=String.format("%4s", Integer.toBinaryString(sb1[irow][icolumn])).replace(' ', '0');
}else if(i==1){
rnew32+=String.format("%4s", Integer.toBinaryString(sb2[irow][icolumn])).replace(' ', '0');
}else if(i==2){
rnew32+=String.format("%4s", Integer.toBinaryString(sb3[irow][icolumn])).replace(' ', '0');
}else if(i==3){
rnew32+=String.format("%4s", Integer.toBinaryString(sb4[irow][icolumn])).replace(' ', '0');
}else if(i==4){
rnew32+=String.format("%4s", Integer.toBinaryString(sb5[irow][icolumn])).replace(' ', '0');
}else if(i==5){
rnew32+=String.format("%4s", Integer.toBinaryString(sb6[irow][icolumn])).replace(' ', '0');
}else if(i==6){
rnew32+=String.format("%4s", Integer.toBinaryString(sb7[irow][icolumn])).replace(' ', '0');
}else if(i==7){
rnew32+=String.format("%4s", Integer.toBinaryString(sb8[irow][icolumn])).replace(' ', '0');
}
}
//System.out.println(rnew32.length());
//System.out.println(rnew32);
// System.out.print(splitto6[0]+" "+splitto6[1]+" "+splitto6[2]+" "+splitto6[3]+" "+splitto6[4]+" "+splitto6[5]+" "+splitto6[6]+" "+splitto6[7]+"\n");
rnew32=Ppermutation(rnew32);
return rnew32;
}
public String Epermutation(String r32){
r32=" "+r32;
String r48=""+r32.charAt(31)+r32.charAt(1)+r32.charAt(2)+r32.charAt(3)+r32.charAt(4)+r32.charAt(5)+r32.charAt(4)+r32.charAt(5)+r32.charAt(6)+r32.charAt(7)+r32.charAt(8)+r32.charAt(9)+r32.charAt(8)+r32.charAt(9)+r32.charAt(10)+r32.charAt(11)+r32.charAt(12)+r32.charAt(13)+r32.charAt(12)+r32.charAt(13)+r32.charAt(14)+r32.charAt(15)+r32.charAt(16)+r32.charAt(17)+r32.charAt(16)+r32.charAt(17)+r32.charAt(18)+r32.charAt(19)+r32.charAt(20)+r32.charAt(21)+r32.charAt(20)+r32.charAt(21)+r32.charAt(22)+r32.charAt(23)+r32.charAt(24)+r32.charAt(25)+r32.charAt(24)+r32.charAt(25)+r32.charAt(26)+r32.charAt(27)+r32.charAt(28)+r32.charAt(29)+r32.charAt(28)+r32.charAt(29)+r32.charAt(30)+r32.charAt(31)+r32.charAt(32)+r32.charAt(1);
return r48;
}
public String Ppermutation(String r32){
r32=" "+r32;
String r32p=""+r32.charAt(17)+r32.charAt(7)+r32.charAt(20)+r32.charAt(21)+r32.charAt(29)+r32.charAt(12)+r32.charAt(28)+r32.charAt(17)+r32.charAt(1)+r32.charAt(15)+r32.charAt(23)+r32.charAt(26)+r32.charAt(5)+r32.charAt(18)+r32.charAt(31)+r32.charAt(10)+r32.charAt(2)+r32.charAt(8)+r32.charAt(24)+r32.charAt(14)+r32.charAt(32)+r32.charAt(27)+r32.charAt(3)+r32.charAt(9)+r32.charAt(19)+r32.charAt(13)+r32.charAt(30)+r32.charAt(6)+r32.charAt(22)+r32.charAt(11)+r32.charAt(4)+r32.charAt(25);
return r32p;
}
public String IPpermutation(String r64){
r64=" "+r64;
String r64p=""+r64.charAt(58)+r64.charAt(50)+r64.charAt(42)+ r64.charAt(34)+r64.charAt(26)+r64.charAt(18)+r64.charAt(10)+r64.charAt(2)
+r64.charAt(60)+r64.charAt(52)+r64.charAt(44)+r64.charAt(36)+r64.charAt(28)+r64.charAt(20)+r64.charAt(12)+r64.charAt(4)+
r64.charAt(62)+r64.charAt(54)+r64.charAt(46)+r64.charAt(38)+r64.charAt(30)+r64.charAt(22)+r64.charAt(14)+r64.charAt(6)+
r64.charAt(64)+r64.charAt(56)+r64.charAt(48)+r64.charAt(40)+r64.charAt(32)+r64.charAt(24)+r64.charAt(16)+r64.charAt(8)+
r64.charAt(57)+r64.charAt(49)+ r64.charAt(41)+r64.charAt(33)+r64.charAt(25)+r64.charAt(17)+r64.charAt(9)+r64.charAt(1)+
r64.charAt(59)+r64.charAt(51)+r64.charAt(43)+r64.charAt(35)+r64.charAt(27)+r64.charAt(19)+r64.charAt(11)+r64.charAt(3)+
r64.charAt(61)+r64.charAt(53)+r64.charAt(45)+r64.charAt(37)+r64.charAt(29)+r64.charAt(21)+r64.charAt(13)+r64.charAt(5)+
r64.charAt(63)+r64.charAt(55)+r64.charAt(47)+r64.charAt(39)+r64.charAt(31)+r64.charAt(23)+r64.charAt(15)+r64.charAt(7);
return r64p;
}
public String IPpermutation_(String r64){
r64=" "+r64;
String r64p=""+
r64.charAt(40)+r64.charAt(8)+r64.charAt(48)+ r64.charAt(16)+r64.charAt(56)+r64.charAt(24)+r64.charAt(64)+r64.charAt(32)+
r64.charAt(39)+r64.charAt(7)+r64.charAt(47)+r64.charAt(15)+r64.charAt(55)+r64.charAt(23)+r64.charAt(63)+r64.charAt(31)+
r64.charAt(38)+r64.charAt(6)+r64.charAt(46)+r64.charAt(14)+r64.charAt(54)+r64.charAt(22)+r64.charAt(62)+r64.charAt(30)+
r64.charAt(37)+r64.charAt(5)+r64.charAt(45)+r64.charAt(13)+r64.charAt(53)+r64.charAt(21)+r64.charAt(61)+r64.charAt(29)+
r64.charAt(36)+r64.charAt(4)+ r64.charAt(44)+r64.charAt(12)+r64.charAt(52)+r64.charAt(20)+r64.charAt(60)+r64.charAt(28)+
r64.charAt(35)+r64.charAt(3)+r64.charAt(43)+r64.charAt(11)+r64.charAt(51)+r64.charAt(19)+r64.charAt(59)+r64.charAt(27)+
r64.charAt(34)+r64.charAt(2)+r64.charAt(42)+r64.charAt(10)+r64.charAt(50)+r64.charAt(18)+r64.charAt(58)+r64.charAt(26)+
r64.charAt(33)+r64.charAt(1)+r64.charAt(41)+r64.charAt(9)+r64.charAt(49)+r64.charAt(17)+r64.charAt(57)+r64.charAt(25);
return r64p;
}
public String[] Keygenerate(String key){
String[] keys=new String[16];
String key56=pc_1(key);
String lkey28=key56.substring(0,28);
String rkey28=key56.substring(28);
for(int i=0;i<keys.length;i++){
if(i==0 || i==1 || i==8 || i==15){
lkey28=Lbitrotate(lkey28, 1);
rkey28=Lbitrotate(rkey28, 1);
keys[i]=pc_2(lkey28+rkey28);
}else{
lkey28=Lbitrotate(lkey28, 2);
rkey28=Lbitrotate(rkey28, 2);
keys[i]=pc_2(lkey28+rkey28);
}
}
return keys;
}
public String pc_1(String key){
String key56="";
key56=""+key.charAt(56)+key.charAt(48)+key.charAt(40)+key.charAt(32)+key.charAt(24)+key.charAt(16)+key.charAt(8)+key.charAt(0)+key.charAt(57)+key.charAt(49)+key.charAt(41)+key.charAt(33)+key.charAt(25)+key.charAt(17)+key.charAt(9)+key.charAt(1)+key.charAt(58)+key.charAt(50)+key.charAt(42)+key.charAt(34)+key.charAt(26)+key.charAt(18)+key.charAt(10)+key.charAt(2)+key.charAt(59)+key.charAt(51)+key.charAt(43)+key.charAt(35)+key.charAt(62)+key.charAt(54)+key.charAt(46)+key.charAt(38)+key.charAt(30)+key.charAt(23)+key.charAt(14)+key.charAt(6)+key.charAt(61)+key.charAt(53)+key.charAt(45)+key.charAt(37)+key.charAt(29)+key.charAt(21)+key.charAt(13)+key.charAt(5)+key.charAt(60)+key.charAt(52)+key.charAt(44)+key.charAt(36)+key.charAt(28)+key.charAt(20)+key.charAt(12)+key.charAt(4)+key.charAt(27)+key.charAt(19)+key.charAt(11)+key.charAt(3);
return key56;
}
public String pc_2(String key){
String key48="";
key48=""+key.charAt(13)+key.charAt(16)+key.charAt(10)+key.charAt(23)+key.charAt(0)+key.charAt(4)+key.charAt(2)+key.charAt(27)+key.charAt(14)+key.charAt(5)+key.charAt(20)+key.charAt(9)+key.charAt(22)+key.charAt(18)+key.charAt(11)+key.charAt(3)+key.charAt(25)+key.charAt(7)+key.charAt(15)+key.charAt(6)+key.charAt(26)+key.charAt(19)+key.charAt(12)+key.charAt(1)+key.charAt(40)+key.charAt(51)+key.charAt(30)+key.charAt(36)+key.charAt(46)+key.charAt(54)+key.charAt(29)+key.charAt(39)+key.charAt(50)+key.charAt(44)+key.charAt(32)+key.charAt(47)+key.charAt(43)+key.charAt(48)+key.charAt(38)+key.charAt(55)+key.charAt(33)+key.charAt(52)+key.charAt(45)+key.charAt(41)+key.charAt(49)+key.charAt(35)+key.charAt(28)+key.charAt(31);
return key48;
}
public String Lbitrotate(String bin,int times){
String binary=bin;
String binary2="";
String binarynew="";
for(int i=0;i<times;i++){
if(i<1){
binary2=binary.substring(1)+binary.charAt(0);
}else{
binary2=binarynew.substring(1)+binarynew.charAt(0);
}
binarynew=binary2;
}
return binary2;enter code here