Java实现与JS相同的Des加解密算法完整实例

package com.lyz.base.des;import java.util.ArrayList;import java.util.List;/** * DES加密/解密 * * @Copyright Copyright (c) 2015 * @author liuyazhuang * @see DESCore */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 = "VeVB.COm";    String str = desObj.strEnc(data, key1, key2, key3);    System.out.println("武林网测试结果：");    System.out.println(str);    String dec = desObj.strDec(str, key1, key2, key3);    System.out.println(dec);  }  /**   * DES加密/解密   *   * @Copyright Copyright (c) 2015   * @author liuyazhuang   * @see DESCore   */  /*   * encrypt the string to string made up of hex return the encrypted string   */  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;  }  /*   * decrypt the encrypted string to the original string   * return the original string   */  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;  }  /*   * chang the string into the bit array   *   * return bit array(it's length % 64 = 0)   */  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;  }  /*   * chang the string(it's length <= 4) into the bit array   *   * return bit array(it's length = 64)   */  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;  }  /*   * chang the bit(it's length = 4) into the hex   *   * return hex   */  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;  }  /*   * chang the hex into the bit(it's length = 4)   *   * return the bit(it's length = 4)   */  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;  }  /*   * chang the bit(it's length = 64) into the string   *   * return string   */  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;  }  /*   * the 64 bit des core arithmetic   */  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 } };    /* Table - s2 */    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 } };    /* Table - s3 */    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 } };    /* Table - s4 */    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 } };    /* Table - s5 */    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 } };    /* Table - s6 */    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 } };    /* Table - s7 */    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 } };    /* Table - s8 */    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;  }  /*   * generate 16 keys for xor   *   */  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;  }}

/*** DES加密/解密* @Copyright Copyright (c) 2015* @author liuyazhuang* @see DESCore*//** encrypt the string to string made up of hex* return the encrypted string*/function strEnc(data,firstKey,secondKey,thirdKey){ var leng = data.length; var encData = ""; var firstKeyBt,secondKeyBt,thirdKeyBt,firstLength,secondLength,thirdLength; if(firstKey != null && firstKey != ""){  firstKeyBt = getKeyBytes(firstKey);  firstLength = firstKeyBt.length; } if(secondKey != null && secondKey != ""){  secondKeyBt = getKeyBytes(secondKey);  secondLength = secondKeyBt.length; } if(thirdKey != null && thirdKey != ""){  thirdKeyBt = getKeyBytes(thirdKey);  thirdLength = thirdKeyBt.length; } if(leng > 0){  if(leng < 4){   var bt = strToBt(data);   var encByte ;   if(firstKey != null && firstKey !="" && secondKey != null && secondKey != "" && thirdKey != null && thirdKey != ""){    var tempBt;    var x,y,z;    tempBt = bt;    for(x = 0;x < firstLength ;x ++){     tempBt = enc(tempBt,firstKeyBt[x]);    }    for(y = 0;y < secondLength ;y ++){     tempBt = enc(tempBt,secondKeyBt[y]);    }    for(z = 0;z < thirdLength ;z ++){     tempBt = enc(tempBt,thirdKeyBt[z]);    }    encByte = tempBt;   }else{    if(firstKey != null && firstKey !="" && secondKey != null && secondKey != ""){     var tempBt;     var x,y;     tempBt = bt;     for(x = 0;x < firstLength ;x ++){      tempBt = enc(tempBt,firstKeyBt[x]);     }     for(y = 0;y < secondLength ;y ++){      tempBt = enc(tempBt,secondKeyBt[y]);     }     encByte = tempBt;    }else{     if(firstKey != null && firstKey !=""){      var tempBt;      var x = 0;      tempBt = bt;      for(x = 0;x < firstLength ;x ++){       tempBt = enc(tempBt,firstKeyBt[x]);      }      encByte = tempBt;     }    }   }   encData = bt64ToHex(encByte);  }else{   var iterator = parseInt(leng/4);   var remainder = leng%4;   var i=0;   for(i = 0;i < iterator;i++){    var tempData = data.substring(i*4+0,i*4+4);    var tempByte = strToBt(tempData);    var encByte ;    if(firstKey != null && firstKey !="" && secondKey != null && secondKey != "" && thirdKey != null && thirdKey != ""){     var tempBt;     var x,y,z;     tempBt = tempByte;     for(x = 0;x < firstLength ;x ++){      tempBt = enc(tempBt,firstKeyBt[x]);     }     for(y = 0;y < secondLength ;y ++){      tempBt = enc(tempBt,secondKeyBt[y]);     }     for(z = 0;z < thirdLength ;z ++){      tempBt = enc(tempBt,thirdKeyBt[z]);     }     encByte = tempBt;    }else{     if(firstKey != null && firstKey !="" && secondKey != null && secondKey != ""){      var tempBt;      var x,y;      tempBt = tempByte;      for(x = 0;x < firstLength ;x ++){       tempBt = enc(tempBt,firstKeyBt[x]);      }      for(y = 0;y < secondLength ;y ++){       tempBt = enc(tempBt,secondKeyBt[y]);      }      encByte = tempBt;     }else{      if(firstKey != null && firstKey !=""){       var tempBt;       var x;       tempBt = tempByte;       for(x = 0;x < firstLength ;x ++){        tempBt = enc(tempBt,firstKeyBt[x]);       }       encByte = tempBt;      }     }    }    encData += bt64ToHex(encByte);   }   if(remainder > 0){    var remainderData = data.substring(iterator*4+0,leng);    var tempByte = strToBt(remainderData);    var encByte ;    if(firstKey != null && firstKey !="" && secondKey != null && secondKey != "" && thirdKey != null && thirdKey != ""){     var tempBt;     var x,y,z;     tempBt = tempByte;     for(x = 0;x < firstLength ;x ++){      tempBt = enc(tempBt,firstKeyBt[x]);     }     for(y = 0;y < secondLength ;y ++){      tempBt = enc(tempBt,secondKeyBt[y]);     }     for(z = 0;z < thirdLength ;z ++){      tempBt = enc(tempBt,thirdKeyBt[z]);     }     encByte = tempBt;    }else{     if(firstKey != null && firstKey !="" && secondKey != null && secondKey != ""){      var tempBt;      var x,y;      tempBt = tempByte;      for(x = 0;x < firstLength ;x ++){       tempBt = enc(tempBt,firstKeyBt[x]);      }      for(y = 0;y < secondLength ;y ++){       tempBt = enc(tempBt,secondKeyBt[y]);      }      encByte = tempBt;     }else{      if(firstKey != null && firstKey !=""){       var tempBt;       var x;       tempBt = tempByte;       for(x = 0;x < firstLength ;x ++){        tempBt = enc(tempBt,firstKeyBt[x]);       }       encByte = tempBt;      }     }    }    encData += bt64ToHex(encByte);   }  } } return encData;}/** decrypt the encrypted string to the original string** return the original string*/function strDec(data,firstKey,secondKey,thirdKey){ var leng = data.length; var decStr = ""; var firstKeyBt,secondKeyBt,thirdKeyBt,firstLength,secondLength,thirdLength; if(firstKey != null && firstKey != ""){  firstKeyBt = getKeyBytes(firstKey);  firstLength = firstKeyBt.length; } if(secondKey != null && secondKey != ""){  secondKeyBt = getKeyBytes(secondKey);  secondLength = secondKeyBt.length; } if(thirdKey != null && thirdKey != ""){  thirdKeyBt = getKeyBytes(thirdKey);  thirdLength = thirdKeyBt.length; } var iterator = parseInt(leng/16); var i=0; for(i = 0;i < iterator;i++){  var tempData = data.substring(i*16+0,i*16+16);  var strByte = hexToBt64(tempData);  var intByte = new Array(64);  var j = 0;  for(j = 0;j < 64; j++){   intByte[j] = parseInt(strByte.substring(j,j+1));  }  var decByte;  if(firstKey != null && firstKey !="" && secondKey != null && secondKey != "" && thirdKey != null && thirdKey != ""){   var tempBt;   var x,y,z;   tempBt = intByte;   for(x = thirdLength - 1;x >= 0;x --){    tempBt = dec(tempBt,thirdKeyBt[x]);   }   for(y = secondLength - 1;y >= 0;y --){    tempBt = dec(tempBt,secondKeyBt[y]);   }   for(z = firstLength - 1;z >= 0 ;z --){    tempBt = dec(tempBt,firstKeyBt[z]);   }   decByte = tempBt;  }else{   if(firstKey != null && firstKey !="" && secondKey != null && secondKey != ""){    var tempBt;    var x,y,z;    tempBt = intByte;    for(x = secondLength - 1;x >= 0 ;x --){     tempBt = dec(tempBt,secondKeyBt[x]);    }    for(y = firstLength - 1;y >= 0 ;y --){     tempBt = dec(tempBt,firstKeyBt[y]);    }    decByte = tempBt;   }else{    if(firstKey != null && firstKey !=""){     var tempBt;     var x,y,z;     tempBt = intByte;     for(x = firstLength - 1;x >= 0 ;x --){      tempBt = dec(tempBt,firstKeyBt[x]);     }     decByte = tempBt;    }   }  }  decStr += byteToString(decByte); } return decStr;}/** chang the string into the bit array** return bit array(it's length % 64 = 0)*/function getKeyBytes(key){ var keyBytes = new Array(); var leng = key.length; var iterator = parseInt(leng/4); var remainder = leng%4; var i = 0; for(i = 0;i < iterator; i ++){  keyBytes[i] = strToBt(key.substring(i*4+0,i*4+4)); } if(remainder > 0){  keyBytes[i] = strToBt(key.substring(i*4+0,leng)); } return keyBytes;}/** chang the string(it's length <= 4) into the bit array** return bit array(it's length = 64)*/function strToBt(str){ var leng = str.length; var bt = new Array(64); if(leng < 4){  var i=0,j=0,p=0,q=0;  for(i = 0;i<leng;i++){   var k = str.charCodeAt(i);   for(j=0;j<16;j++){    var pow=1,m=0;    for(m=15;m>j;m--){     pow *= 2;    }    bt[16*i+j]=parseInt(k/pow)%2;   }  }  for(p = leng;p<4;p++){   var k = 0;   for(q=0;q<16;q++){    var pow=1,m=0;    for(m=15;m>q;m--){     pow *= 2;    }    bt[16*p+q]=parseInt(k/pow)%2;   }  } }else{  for(i = 0;i<4;i++){   var k = str.charCodeAt(i);   for(j=0;j<16;j++){    var pow=1;    for(m=15;m>j;m--){     pow *= 2;    }    bt[16*i+j]=parseInt(k/pow)%2;   }  } } return bt;}/** chang the bit(it's length = 4) into the hex** return hex*/function bt4ToHex(binary) { var hex; switch (binary) {  case "0000" : hex = "0"; break;  case "0001" : hex = "1"; break;  case "0010" : hex = "2"; break;  case "0011" : hex = "3"; break;  case "0100" : hex = "4"; break;  case "0101" : hex = "5"; break;  case "0110" : hex = "6"; break;  case "0111" : hex = "7"; break;  case "1000" : hex = "8"; break;  case "1001" : hex = "9"; break;  case "1010" : hex = "A"; break;  case "1011" : hex = "B"; break;  case "1100" : hex = "C"; break;  case "1101" : hex = "D"; break;  case "1110" : hex = "E"; break;  case "1111" : hex = "F"; break; } return hex;}/** chang the hex into the bit(it's length = 4)** return the bit(it's length = 4)*/function hexToBt4(hex) { var binary; switch (hex) {  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 "A" : binary = "1010"; break;  case "B" : binary = "1011"; break;  case "C" : binary = "1100"; break;  case "D" : binary = "1101"; break;  case "E" : binary = "1110"; break;  case "F" : binary = "1111"; break; } return binary;}/** chang the bit(it's length = 64) into the string** return string*/function byteToString(byteData){ var str=""; for(i = 0;i<4;i++){  var count=0;  for(j=0;j<16;j++){   var pow=1;   for(m=15;m>j;m--){    pow*=2;   }   count+=byteData[16*i+j]*pow;  }  if(count != 0){   str+=String.fromCharCode(count);  } } return str;}function bt64ToHex(byteData){ var hex = ""; for(i = 0;i<16;i++){  var bt = "";  for(j=0;j<4;j++){   bt += byteData[i*4+j];  }  hex+=bt4ToHex(bt); } return hex;}function hexToBt64(hex){ var binary = ""; for(i = 0;i<16;i++){  binary+=hexToBt4(hex.substring(i,i+1)); } return binary;}/** the 64 bit des core arithmetic*/function enc(dataByte,keyByte){ var keys = generateKeys(keyByte); var ipByte  = initPermute(dataByte); var ipLeft  = new Array(32); var ipRight = new Array(32); var tempLeft = new Array(32); var 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];  }  var key = new Array(48);  for(m = 0;m < 48;m ++){   key[m] = keys[i][m];  }  var tempRight = xor(pPermute(sBoxPermute(xor(expandPermute(ipRight),key))), tempLeft);  for(n = 0;n < 32;n ++){   ipRight[n] = tempRight[n];  } } var finalData =new Array(64); for(i = 0;i < 32;i ++){  finalData[i] = ipRight[i];  finalData[32+i] = ipLeft[i]; } return finallyPermute(finalData);}function dec(dataByte,keyByte){ var keys = generateKeys(keyByte); var ipByte  = initPermute(dataByte); var ipLeft  = new Array(32); var ipRight = new Array(32); var tempLeft = new Array(32); var 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];  }  var key = new Array(48);  for(m = 0;m < 48;m ++){   key[m] = keys[i][m];  }  var tempRight = xor(pPermute(sBoxPermute(xor(expandPermute(ipRight),key))), tempLeft);  for(n = 0;n < 32;n ++){   ipRight[n] = tempRight[n];  } } var finalData =new Array(64); for(i = 0;i < 32;i ++){  finalData[i] = ipRight[i];  finalData[32+i] = ipLeft[i]; } return finallyPermute(finalData);}function initPermute(originalData){ var ipByte = new Array(64); 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;}function expandPermute(rightData){ var epByte = new Array(48); 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;}function xor(byteOne,byteTwo){ var xorByte = new Array(byteOne.length); for(i = 0;i < byteOne.length; i ++){  xorByte[i] = byteOne[i] ^ byteTwo[i]; } return xorByte;}function sBoxPermute(expandByte){  var sBoxByte = new Array(32);  var binary = "";  var 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 ]];    /* Table - s2 */  var 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 ]];    /* Table - s3 */  var 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 ]];    /* Table - s4 */  var 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 ]];    /* Table - s5 */  var 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 ]];    /* Table - s6 */  var 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 ]];    /* Table - s7 */  var 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]];    /* Table - s8 */  var 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(m=0;m<8;m++){  var 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] = parseInt(binary.substring(0,1));  sBoxByte[m*4+1] = parseInt(binary.substring(1,2));  sBoxByte[m*4+2] = parseInt(binary.substring(2,3));  sBoxByte[m*4+3] = parseInt(binary.substring(3,4)); } return sBoxByte;}function pPermute(sBoxByte){ var pBoxPermute = new Array(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;}function finallyPermute(endByte){ var fpByte = new Array(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;}function getBoxBinary(i) { var 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;}/** generate 16 keys for xor**/function generateKeys(keyByte){ var key  = new Array(56); var keys = new Array(); 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(); var loop = [1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1]; for(i=0;i<7;i++){  for(j=0,k=7;j<8;j++,k--){   key[i*8+j]=keyByte[8*k+i];  } } var i = 0; for(i = 0;i < 16;i ++){  var tempLeft=0;  var tempRight=0;  for(j = 0; j < loop[i];j ++){   tempLeft = key[0];   tempRight = key[28];   for(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);  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];  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;}

<!DOCTYPE HTML><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />  <script type="text/javascript" src="des.js"></script>  <script>    function getResult(){      //待加密字符串      var str = document.getElementById("str").innerHTML;      //第一个参数必须；第二个、第三个参数可选      var key1 = document.getElementById("key1").innerHTML;      var key2 = document.getElementById("key2").innerHTML;      var key3 = document.getElementById("key3").innerHTML;      //加密方法      var enResult = strEnc(str,key1,key2,key3);      //解密方法      var deResult = strDec(enResult,key1,key2,key3);      //展示结果      document.getElementById("enStr").innerHTML = enResult;      document.getElementById("dnStr").innerHTML = deResult;    }  </script></head><body><input type="button" value="获取加密结果与解密结果" onclick="getResult()" />  <table>    <tr>     <td align="left">字符串：</td>     <td><span id="str">VeVB.COm</span></td>    </tr>    <tr>     <td>加密key：</td>     <td>key1=<span id="key1">1</span>;key2=<span id="key2">2</span>;key3=<span id="key3">3</span></td>    </tr>    <tr>     <td align="left">加密结果：</td>     <td align="left"><label id = "enStr"></label></td>    </tr>    <tr>     <td align="left">解密结果： </td>     <td align="left"><label id = "dnStr"></label></td>    </tr>  <table></body></html>