Java实现与JS相同的Des加解密算法完整实例

本文实例讲述了Java实现与js相同的Des加解密算法。分享给大家供大家参考，具体如下：

这里演示java与js实现相同的des加解密算法，不多说，不废话，直接上代码

一、java实现

package com.lyz.base.des;import java.util.ArrayList;import java.util.List;public class Des {  public Des() {  }  public static void main(String[] args) {    Des desObj = new Des();    String key1 = "1";    String key2 = "2";    String key3 = "3";    String data = "jb51.net";    String str = desObj.strEnc(data, key1, key2, key3);    System.out.println("编程网测试结果：");    System.out.println(str);    String dec = desObj.strDec(str, key1, key2, key3);    System.out.println(dec);  }      public String strEnc(String data, String firsTKEy, String secondKey,      String thirdKey) {    int leng = data.length();    String encData = "";    List firstKeyBt = null, secondKeyBt = null, thirdKeyBt = null;    int firstLength = 0, secondLength = 0, thirdLength = 0;    if (firstKey != null && firstKey != "") {      firstKeyBt = getKeyBytes(firstKey);      firstLength = firstKeyBt.size();    }    if (secondKey != null && secondKey != "") {      secondKeyBt = getKeyBytes(secondKey);      secondLength = secondKeyBt.size();    }    if (thirdKey != null && thirdKey != "") {      thirdKeyBt = getKeyBytes(thirdKey);      thirdLength = thirdKeyBt.size();    }    if (leng > 0) {      if (leng < 4) {        int[] bt = strToBt(data);        int[] encByte = null;        if (firstKey != null && firstKey != "" && secondKey != null            && secondKey != "" && thirdKey != null            && thirdKey != "") {          int[] tempBt;          int x, y, z;          tempBt = bt;          for (x = 0; x < firstLength; x++) {            tempBt = enc(tempBt, (int[]) firstKeyBt.get(x));          }          for (y = 0; y < secondLength; y++) {            tempBt = enc(tempBt, (int[]) secondKeyBt.get(y));          }          for (z = 0; z < thirdLength; z++) {            tempBt = enc(tempBt, (int[]) thirdKeyBt.get(z));          }          encByte = tempBt;        } else {          if (firstKey != null && firstKey != "" && secondKey != null              && secondKey != "") {            int[] tempBt;            int x, y;            tempBt = bt;            for (x = 0; x < firstLength; x++) {              tempBt = enc(tempBt, (int[]) firstKeyBt.get(x));            }            for (y = 0; y < secondLength; y++) {              tempBt = enc(tempBt, (int[]) secondKeyBt.get(y));            }            encByte = tempBt;          } else {            if (firstKey != null && firstKey != "") {              int[] tempBt;              int x = 0;              tempBt = bt;              for (x = 0; x < firstLength; x++) {                tempBt = enc(tempBt, (int[]) firstKeyBt.get(x));              }              encByte = tempBt;            }          }        }        encData = bt64ToHex(encByte);      } else {        int iterator = (leng / 4);        int remainder = leng % 4;        int i = 0;        for (i = 0; i < iterator; i++) {          String tempData = data.substring(i * 4 + 0, i * 4 + 4);          int[] tempByte = strToBt(tempData);          int[] encByte = null;          if (firstKey != null && firstKey != "" && secondKey != null              && secondKey != "" && thirdKey != null              && thirdKey != "") {            int[] tempBt;            int x, y, z;            tempBt = tempByte;            for (x = 0; x < firstLength; x++) {              tempBt = enc(tempBt, (int[]) firstKeyBt.get(x));            }            for (y = 0; y < secondLength; y++) {              tempBt = enc(tempBt, (int[]) secondKeyBt.get(y));            }            for (z = 0; z < thirdLength; z++) {              tempBt = enc(tempBt, (int[]) thirdKeyBt.get(z));            }            encByte = tempBt;          } else {            if (firstKey != null && firstKey != ""                && secondKey != null && secondKey != "") {              int[] tempBt;              int x, y;              tempBt = tempByte;              for (x = 0; x < firstLength; x++) {                tempBt = enc(tempBt, (int[]) firstKeyBt.get(x));              }              for (y = 0; y < secondLength; y++) {                tempBt = enc(tempBt, (int[]) secondKeyBt.get(y));              }              encByte = tempBt;            } else {              if (firstKey != null && firstKey != "") {                int[] tempBt;                int x;                tempBt = tempByte;                for (x = 0; x < firstLength; x++) {                  tempBt = enc(tempBt, (int[]) firstKeyBt                      .get(x));                }                encByte = tempBt;              }            }          }          encData += bt64ToHex(encByte);        }        if (remainder > 0) {          String remainderData = data.substring(iterator * 4 + 0,              leng);          int[] tempByte = strToBt(remainderData);          int[] encByte = null;          if (firstKey != null && firstKey != "" && secondKey != null              && secondKey != "" && thirdKey != null              && thirdKey != "") {            int[] tempBt;            int x, y, z;            tempBt = tempByte;            for (x = 0; x < firstLength; x++) {              tempBt = enc(tempBt, (int[]) firstKeyBt.get(x));            }            for (y = 0; y < secondLength; y++) {              tempBt = enc(tempBt, (int[]) secondKeyBt.get(y));            }            for (z = 0; z < thirdLength; z++) {              tempBt = enc(tempBt, (int[]) thirdKeyBt.get(z));            }            encByte = tempBt;          } else {            if (firstKey != null && firstKey != ""                && secondKey != null && secondKey != "") {              int[] tempBt;              int x, y;              tempBt = tempByte;              for (x = 0; x < firstLength; x++) {                tempBt = enc(tempBt, (int[]) firstKeyBt.get(x));              }              for (y = 0; y < secondLength; y++) {                tempBt = enc(tempBt, (int[]) secondKeyBt.get(y));              }              encByte = tempBt;            } else {              if (firstKey != null && firstKey != "") {                int[] tempBt;                int x;                tempBt = tempByte;                for (x = 0; x < firstLength; x++) {                  tempBt = enc(tempBt, (int[]) firstKeyBt                      .get(x));                }                encByte = tempBt;              }            }          }          encData += bt64ToHex(encByte);        }      }    }    return encData;  }    public String strDec(String data, String firstKey, String secondKey,      String thirdKey) {    int leng = data.length();    String decStr = "";    List firstKeyBt = null, secondKeyBt = null, thirdKeyBt = null;    int firstLength = 0, secondLength = 0, thirdLength = 0;    if (firstKey != null && firstKey != "") {      firstKeyBt = getKeyBytes(firstKey);      firstLength = firstKeyBt.size();    }    if (secondKey != null && secondKey != "") {      secondKeyBt = getKeyBytes(secondKey);      secondLength = secondKeyBt.size();    }    if (thirdKey != null && thirdKey != "") {      thirdKeyBt = getKeyBytes(thirdKey);      thirdLength = thirdKeyBt.size();    }    int iterator = leng / 16;    int i = 0;    for (i = 0; i < iterator; i++) {      String tempData = data.substring(i * 16 + 0, i * 16 + 16);      String strByte = hexToBt64(tempData);      int[] intByte = new int[64];      int j = 0;      for (j = 0; j < 64; j++) {        intByte[j] = Integer.parseInt(strByte.substring(j, j + 1));      }      int[] decByte = null;      if (firstKey != null && firstKey != "" && secondKey != null          && secondKey != "" && thirdKey != null && thirdKey != "") {        int[] tempBt;        int x, y, z;        tempBt = intByte;        for (x = thirdLength - 1; x >= 0; x--) {          tempBt = dec(tempBt, (int[]) thirdKeyBt.get(x));        }        for (y = secondLength - 1; y >= 0; y--) {          tempBt = dec(tempBt, (int[]) secondKeyBt.get(y));        }        for (z = firstLength - 1; z >= 0; z--) {          tempBt = dec(tempBt, (int[]) firstKeyBt.get(z));        }        decByte = tempBt;      } else {        if (firstKey != null && firstKey != "" && secondKey != null            && secondKey != "") {          int[] tempBt;          int x, y, z;          tempBt = intByte;          for (x = secondLength - 1; x >= 0; x--) {            tempBt = dec(tempBt, (int[]) secondKeyBt.get(x));          }          for (y = firstLength - 1; y >= 0; y--) {            tempBt = dec(tempBt, (int[]) firstKeyBt.get(y));          }          decByte = tempBt;        } else {          if (firstKey != null && firstKey != "") {            int[] tempBt;            int x, y, z;            tempBt = intByte;            for (x = firstLength - 1; x >= 0; x--) {              tempBt = dec(tempBt, (int[]) firstKeyBt.get(x));            }            decByte = tempBt;          }        }      }      decStr += byteToString(decByte);    }    return decStr;  }    public List getKeyBytes(String key) {    List keyBytes = new ArrayList();    int leng = key.length();    int iterator = (leng / 4);    int remainder = leng % 4;    int i = 0;    for (i = 0; i < iterator; i++) {      keyBytes.add(i, strToBt(key.substring(i * 4 + 0, i * 4 + 4)));    }    if (remainder > 0) {      // keyBytes[i] = strToBt(key.substring(i*4+0,leng));      keyBytes.add(i, strToBt(key.substring(i * 4 + 0, leng)));    }    return keyBytes;  }    public int[] strToBt(String str) {    int leng = str.length();    int[] bt = new int[64];    if (leng < 4) {      int i = 0, j = 0, p = 0, q = 0;      for (i = 0; i < leng; i++) {        int k = str.charAt(i);        for (j = 0; j < 16; j++) {          int pow = 1, m = 0;          for (m = 15; m > j; m--) {            pow *= 2;          }          // bt.set(16*i+j,""+(k/pow)%2));          bt[16 * i + j] = (k / pow) % 2;        }      }      for (p = leng; p < 4; p++) {        int k = 0;        for (q = 0; q < 16; q++) {          int pow = 1, m = 0;          for (m = 15; m > q; m--) {            pow *= 2;          }          // bt[16*p+q]=parseInt(k/pow)%2;          // bt.add(16*p+q,""+((k/pow)%2));          bt[16 * p + q] = (k / pow) % 2;        }      }    } else {      for (int i = 0; i < 4; i++) {        int k = str.charAt(i);        for (int j = 0; j < 16; j++) {          int pow = 1;          for (int m = 15; m > j; m--) {            pow *= 2;          }          // bt[16*i+j]=parseInt(k/pow)%2;          // bt.add(16*i+j,""+((k/pow)%2));          bt[16 * i + j] = (k / pow) % 2;        }      }    }    return bt;  }    public String bt4ToHex(String binary) {    String hex = "";    if (binary.equalsIgnoreCase("0000")) {      hex = "0";    } else if (binary.equalsIgnoreCase("0001")) {      hex = "1";    } else if (binary.equalsIgnoreCase("0010")) {      hex = "2";    } else if (binary.equalsIgnoreCase("0011")) {      hex = "3";    } else if (binary.equalsIgnoreCase("0100")) {      hex = "4";    } else if (binary.equalsIgnoreCase("0101")) {      hex = "5";    } else if (binary.equalsIgnoreCase("0110")) {      hex = "6";    } else if (binary.equalsIgnoreCase("0111")) {      hex = "7";    } else if (binary.equalsIgnoreCase("1000")) {      hex = "8";    } else if (binary.equalsIgnoreCase("1001")) {      hex = "9";    } else if (binary.equalsIgnoreCase("1010")) {      hex = "A";    } else if (binary.equalsIgnoreCase("1011")) {      hex = "B";    } else if (binary.equalsIgnoreCase("1100")) {      hex = "C";    } else if (binary.equalsIgnoreCase("1101")) {      hex = "D";    } else if (binary.equalsIgnoreCase("1110")) {      hex = "E";    } else if (binary.equalsIgnoreCase("1111")) {      hex = "F";    }    return hex;  }    public String hexToBt4(String hex) {    String binary = "";    if (hex.equalsIgnoreCase("0")) {      binary = "0000";    } else if (hex.equalsIgnoreCase("1")) {      binary = "0001";    }    if (hex.equalsIgnoreCase("2")) {      binary = "0010";    }    if (hex.equalsIgnoreCase("3")) {      binary = "0011";    }    if (hex.equalsIgnoreCase("4")) {      binary = "0100";    }    if (hex.equalsIgnoreCase("5")) {      binary = "0101";    }    if (hex.equalsIgnoreCase("6")) {      binary = "0110";    }    if (hex.equalsIgnoreCase("7")) {      binary = "0111";    }    if (hex.equalsIgnoreCase("8")) {      binary = "1000";    }    if (hex.equalsIgnoreCase("9")) {      binary = "1001";    }    if (hex.equalsIgnoreCase("A")) {      binary = "1010";    }    if (hex.equalsIgnoreCase("B")) {      binary = "1011";    }    if (hex.equalsIgnoreCase("C")) {      binary = "1100";    }    if (hex.equalsIgnoreCase("D")) {      binary = "1101";    }    if (hex.equalsIgnoreCase("E")) {      binary = "1110";    }    if (hex.equalsIgnoreCase("F")) {      binary = "1111";    }    return binary;  }    public String byteToString(int[] byteData) {    String str = "";    for (int i = 0; i < 4; i++) {      int count = 0;      for (int j = 0; j < 16; j++) {        int pow = 1;        for (int m = 15; m > j; m--) {          pow *= 2;        }        count += byteData[16 * i + j] * pow;      }      if (count != 0) {        str += "" + (char) (count);      }    }    return str;  }  public String bt64ToHex(int[] byteData) {    String hex = "";    for (int i = 0; i < 16; i++) {      String bt = "";      for (int j = 0; j < 4; j++) {        bt += byteData[i * 4 + j];      }      hex += bt4ToHex(bt);    }    return hex;  }  public String hexToBt64(String hex) {    String binary = "";    for (int i = 0; i < 16; i++) {      binary += hexToBt4(hex.substring(i, i + 1));    }    return binary;  }    public int[] enc(int[] dataByte, int[] keyByte) {    int[][] keys = generateKeys(keyByte);    int[] ipByte = initPermute(dataByte);    int[] ipLeft = new int[32];    int[] ipRight = new int[32];    int[] tempLeft = new int[32];    int i = 0, j = 0, k = 0, m = 0, n = 0;    for (k = 0; k < 32; k++) {      ipLeft[k] = ipByte[k];      ipRight[k] = ipByte[32 + k];    }    for (i = 0; i < 16; i++) {      for (j = 0; j < 32; j++) {        tempLeft[j] = ipLeft[j];        ipLeft[j] = ipRight[j];      }      int[] key = new int[48];      for (m = 0; m < 48; m++) {        key[m] = keys[i][m];      }      int[] tempRight = xor(pPermute(sBoxPermute(xor(          expandPermute(ipRight), key))), tempLeft);      for (n = 0; n < 32; n++) {        ipRight[n] = tempRight[n];      }    }    int[] finalData = new int[64];    for (i = 0; i < 32; i++) {      finalData[i] = ipRight[i];      finalData[32 + i] = ipLeft[i];    }    return finallyPermute(finalData);  }  public int[] dec(int[] dataByte, int[] keyByte) {    int[][] keys = generateKeys(keyByte);    int[] ipByte = initPermute(dataByte);    int[] ipLeft = new int[32];    int[] ipRight = new int[32];    int[] tempLeft = new int[32];    int i = 0, j = 0, k = 0, m = 0, n = 0;    for (k = 0; k < 32; k++) {      ipLeft[k] = ipByte[k];      ipRight[k] = ipByte[32 + k];    }    for (i = 15; i >= 0; i--) {      for (j = 0; j < 32; j++) {        tempLeft[j] = ipLeft[j];        ipLeft[j] = ipRight[j];      }      int[] key = new int[48];      for (m = 0; m < 48; m++) {        key[m] = keys[i][m];      }      int[] tempRight = xor(pPermute(sBoxPermute(xor(          expandPermute(ipRight), key))), tempLeft);      for (n = 0; n < 32; n++) {        ipRight[n] = tempRight[n];      }    }    int[] finalData = new int[64];    for (i = 0; i < 32; i++) {      finalData[i] = ipRight[i];      finalData[32 + i] = ipLeft[i];    }    return finallyPermute(finalData);  }  public int[] initPermute(int[] originalData) {    int[] ipByte = new int[64];    int i = 0, m = 1, n = 0, j, k;    for (i = 0, m = 1, n = 0; i < 4; i++, m += 2, n += 2) {      for (j = 7, k = 0; j >= 0; j--, k++) {        ipByte[i * 8 + k] = originalData[j * 8 + m];        ipByte[i * 8 + k + 32] = originalData[j * 8 + n];      }    }    return ipByte;  }  public int[] expandPermute(int[] rightData) {    int[] epByte = new int[48];    int i, j;    for (i = 0; i < 8; i++) {      if (i == 0) {        epByte[i * 6 + 0] = rightData[31];      } else {        epByte[i * 6 + 0] = rightData[i * 4 - 1];      }      epByte[i * 6 + 1] = rightData[i * 4 + 0];      epByte[i * 6 + 2] = rightData[i * 4 + 1];      epByte[i * 6 + 3] = rightData[i * 4 + 2];      epByte[i * 6 + 4] = rightData[i * 4 + 3];      if (i == 7) {        epByte[i * 6 + 5] = rightData[0];      } else {        epByte[i * 6 + 5] = rightData[i * 4 + 4];      }    }    return epByte;  }  public int[] xor(int[] byteOne, int[] byteTwo) {    // var xorByte = new Array(byteOne.length);    // for(int i = 0;i < byteOne.length; i ++){    // xorByte[i] = byteOne[i] ^ byteTwo[i];    // }    // return xorByte;    int[] xorByte = new int[byteOne.length];    for (int i = 0; i < byteOne.length; i++) {      xorByte[i] = byteOne[i] ^ byteTwo[i];    }    return xorByte;  }  public int[] sBoxPermute(int[] expandByte) {    // var sBoxByte = new Array(32);    int[] sBoxByte = new int[32];    String binary = "";    int[][] 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 } };        int[][] 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 } };        int[][] 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 } };        int[][] 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 },        { 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 } };        int[][] 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 } };        int[][] 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 } };        int[][] 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 } };        int[][] 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 } };    for (int m = 0; m < 8; m++) {      int i = 0, j = 0;      i = expandByte[m * 6 + 0] * 2 + expandByte[m * 6 + 5];      j = expandByte[m * 6 + 1] * 2 * 2 * 2 + expandByte[m * 6 + 2] * 2          * 2 + expandByte[m * 6 + 3] * 2 + expandByte[m * 6 + 4];      switch (m) {      case 0:        binary = getBoxBinary(s1[i][j]);        break;      case 1:        binary = getBoxBinary(s2[i][j]);        break;      case 2:        binary = getBoxBinary(s3[i][j]);        break;      case 3:        binary = getBoxBinary(s4[i][j]);        break;      case 4:        binary = getBoxBinary(s5[i][j]);        break;      case 5:        binary = getBoxBinary(s6[i][j]);        break;      case 6:        binary = getBoxBinary(s7[i][j]);        break;      case 7:        binary = getBoxBinary(s8[i][j]);        break;      }      sBoxByte[m * 4 + 0] = Integer.parseInt(binary.substring(0, 1));      sBoxByte[m * 4 + 1] = Integer.parseInt(binary.substring(1, 2));      sBoxByte[m * 4 + 2] = Integer.parseInt(binary.substring(2, 3));      sBoxByte[m * 4 + 3] = Integer.parseInt(binary.substring(3, 4));    }    return sBoxByte;  }  public int[] pPermute(int[] sBoxByte) {    int[] pBoxPermute = new int[32];    pBoxPermute[0] = sBoxByte[15];    pBoxPermute[1] = sBoxByte[6];    pBoxPermute[2] = sBoxByte[19];    pBoxPermute[3] = sBoxByte[20];    pBoxPermute[4] = sBoxByte[28];    pBoxPermute[5] = sBoxByte[11];    pBoxPermute[6] = sBoxByte[27];    pBoxPermute[7] = sBoxByte[16];    pBoxPermute[8] = sBoxByte[0];    pBoxPermute[9] = sBoxByte[14];    pBoxPermute[10] = sBoxByte[22];    pBoxPermute[11] = sBoxByte[25];    pBoxPermute[12] = sBoxByte[4];    pBoxPermute[13] = sBoxByte[17];    pBoxPermute[14] = sBoxByte[30];    pBoxPermute[15] = sBoxByte[9];    pBoxPermute[16] = sBoxByte[1];    pBoxPermute[17] = sBoxByte[7];    pBoxPermute[18] = sBoxByte[23];    pBoxPermute[19] = sBoxByte[13];    pBoxPermute[20] = sBoxByte[31];    pBoxPermute[21] = sBoxByte[26];    pBoxPermute[22] = sBoxByte[2];    pBoxPermute[23] = sBoxByte[8];    pBoxPermute[24] = sBoxByte[18];    pBoxPermute[25] = sBoxByte[12];    pBoxPermute[26] = sBoxByte[29];    pBoxPermute[27] = sBoxByte[5];    pBoxPermute[28] = sBoxByte[21];    pBoxPermute[29] = sBoxByte[10];    pBoxPermute[30] = sBoxByte[3];    pBoxPermute[31] = sBoxByte[24];    return pBoxPermute;  }  public int[] finallyPermute(int[] endByte) {    int[] fpByte = new int[64];    fpByte[0] = endByte[39];    fpByte[1] = endByte[7];    fpByte[2] = endByte[47];    fpByte[3] = endByte[15];    fpByte[4] = endByte[55];    fpByte[5] = endByte[23];    fpByte[6] = endByte[63];    fpByte[7] = endByte[31];    fpByte[8] = endByte[38];    fpByte[9] = endByte[6];    fpByte[10] = endByte[46];    fpByte[11] = endByte[14];    fpByte[12] = endByte[54];    fpByte[13] = endByte[22];    fpByte[14] = endByte[62];    fpByte[15] = endByte[30];    fpByte[16] = endByte[37];    fpByte[17] = endByte[5];    fpByte[18] = endByte[45];    fpByte[19] = endByte[13];    fpByte[20] = endByte[53];    fpByte[21] = endByte[21];    fpByte[22] = endByte[61];    fpByte[23] = endByte[29];    fpByte[24] = endByte[36];    fpByte[25] = endByte[4];    fpByte[26] = endByte[44];    fpByte[27] = endByte[12];    fpByte[28] = endByte[52];    fpByte[29] = endByte[20];    fpByte[30] = endByte[60];    fpByte[31] = endByte[28];    fpByte[32] = endByte[35];    fpByte[33] = endByte[3];    fpByte[34] = endByte[43];    fpByte[35] = endByte[11];    fpByte[36] = endByte[51];    fpByte[37] = endByte[19];    fpByte[38] = endByte[59];    fpByte[39] = endByte[27];    fpByte[40] = endByte[34];    fpByte[41] = endByte[2];    fpByte[42] = endByte[42];    fpByte[43] = endByte[10];    fpByte[44] = endByte[50];    fpByte[45] = endByte[18];    fpByte[46] = endByte[58];    fpByte[47] = endByte[26];    fpByte[48] = endByte[33];    fpByte[49] = endByte[1];    fpByte[50] = endByte[41];    fpByte[51] = endByte[9];    fpByte[52] = endByte[49];    fpByte[53] = endByte[17];    fpByte[54] = endByte[57];    fpByte[55] = endByte[25];    fpByte[56] = endByte[32];    fpByte[57] = endByte[0];    fpByte[58] = endByte[40];    fpByte[59] = endByte[8];    fpByte[60] = endByte[48];    fpByte[61] = endByte[16];    fpByte[62] = endByte[56];    fpByte[63] = endByte[24];    return fpByte;  }  public String getBoxBinary(int i) {    String binary = "";    switch (i) {    case 0:      binary = "0000";      break;    case 1:      binary = "0001";      break;    case 2:      binary = "0010";      break;    case 3:      binary = "0011";      break;    case 4:      binary = "0100";      break;    case 5:      binary = "0101";      break;    case 6:      binary = "0110";      break;    case 7:      binary = "0111";      break;    case 8:      binary = "1000";      break;    case 9:      binary = "1001";      break;    case 10:      binary = "1010";      break;    case 11:      binary = "1011";      break;    case 12:      binary = "1100";      break;    case 13:      binary = "1101";      break;    case 14:      binary = "1110";      break;    case 15:      binary = "1111";      break;    }    return binary;  }    public int[][] generateKeys(int[] keyByte) {    int[] key = new int[56];    int[][] keys = new int[16][48];    // keys[ 0] = new Array();    // keys[ 1] = new Array();    // keys[ 2] = new Array();    // keys[ 3] = new Array();    // keys[ 4] = new Array();    // keys[ 5] = new Array();    // keys[ 6] = new Array();    // keys[ 7] = new Array();    // keys[ 8] = new Array();    // keys[ 9] = new Array();    // keys[10] = new Array();    // keys[11] = new Array();    // keys[12] = new Array();    // keys[13] = new Array();    // keys[14] = new Array();    // keys[15] = new Array();    int[] loop = new int[] { 1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1 };    for (int i = 0; i < 7; i++) {      for (int j = 0, k = 7; j < 8; j++, k--) {        key[i * 8 + j] = keyByte[8 * k + i];      }    }    int i = 0;    for (i = 0; i < 16; i++) {      int tempLeft = 0;      int tempRight = 0;      for (int j = 0; j < loop[i]; j++) {        tempLeft = key[0];        tempRight = key[28];        for (int k = 0; k < 27; k++) {          key[k] = key[k + 1];          key[28 + k] = key[29 + k];        }        key[27] = tempLeft;        key[55] = tempRight;      }      // var tempKey = new Array(48);      int[] tempKey = new int[48];      tempKey[0] = key[13];      tempKey[1] = key[16];      tempKey[2] = key[10];      tempKey[3] = key[23];      tempKey[4] = key[0];      tempKey[5] = key[4];      tempKey[6] = key[2];      tempKey[7] = key[27];      tempKey[8] = key[14];      tempKey[9] = key[5];      tempKey[10] = key[20];      tempKey[11] = key[9];      tempKey[12] = key[22];      tempKey[13] = key[18];      tempKey[14] = key[11];      tempKey[15] = key[3];      tempKey[16] = key[25];      tempKey[17] = key[7];      tempKey[18] = key[15];      tempKey[19] = key[6];      tempKey[20] = key[26];      tempKey[21] = key[19];      tempKey[22] = key[12];      tempKey[23] = key[1];      tempKey[24] = key[40];      tempKey[25] = key[51];      tempKey[26] = key[30];      tempKey[27] = key[36];      tempKey[28] = key[46];      tempKey[29] = key[54];      tempKey[30] = key[29];      tempKey[31] = key[39];      tempKey[32] = key[50];      tempKey[33] = key[44];      tempKey[34] = key[32];      tempKey[35] = key[47];      tempKey[36] = key[43];      tempKey[37] = key[48];      tempKey[38] = key[38];      tempKey[39] = key[55];      tempKey[40] = key[33];      tempKey[41] = key[52];      tempKey[42] = key[45];      tempKey[43] = key[41];      tempKey[44] = key[49];      tempKey[45] = key[35];      tempKey[46] = key[28];      tempKey[47] = key[31];      int m;      switch (i) {      case 0:        for (m = 0; m < 48; m++) {          keys[0][m] = tempKey[m];        }        break;      case 1:        for (m = 0; m < 48; m++) {          keys[1][m] = tempKey[m];        }        break;      case 2:        for (m = 0; m < 48; m++) {          keys[2][m] = tempKey[m];        }        break;      case 3:        for (m = 0; m < 48; m++) {          keys[3][m] = tempKey[m];        }        break;      case 4:        for (m = 0; m < 48; m++) {          keys[4][m] = tempKey[m];        }        break;      case 5:        for (m = 0; m < 48; m++) {          keys[5][m] = tempKey[m];        }        break;      case 6:        for (m = 0; m < 48; m++) {          keys[6][m] = tempKey[m];        }        break;      case 7:        for (m = 0; m < 48; m++) {          keys[7][m] = tempKey[m];        }        break;      case 8:        for (m = 0; m < 48; m++) {          keys[8][m] = tempKey[m];        }        break;      case 9:        for (m = 0; m < 48; m++) {          keys[9][m] = tempKey[m];        }        break;      case 10:        for (m = 0; m < 48; m++) {          keys[10][m] = tempKey[m];        }        break;      case 11:        for (m = 0; m < 48; m++) {          keys[11][m] = tempKey[m];        }        break;      case 12:        for (m = 0; m < 48; m++) {          keys[12][m] = tempKey[m];        }        break;      case 13:        for (m = 0; m < 48; m++) {          keys[13][m] = tempKey[m];        }        break;      case 14:        for (m = 0; m < 48; m++) {          keys[14][m] = tempKey[m];        }        break;      case 15:        for (m = 0; m < 48; m++) {          keys[15][m] = tempKey[m];        }        break;      }    }    return keys;  }}