在这里和大家分享一个加密util，相对于md5加密相信大家都已经很熟悉了吧，md5是不可逆的一种加密方式，虽说不可逆但是网上已经有了破解的方法，我这边分享一个免费的破解

网址给大家：https://www.somd5.com/，但是这个网站也只是能破解一些简单的密码；当迭代次数多的时候或者是在其中加入了盐值就很难破解。

　　好了，过多的内容也不说我这边来分享下我这边的加密算法，调用起来也很简单，通过对象来调用对应的encode和decode方法来进行加密和解密操作：

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 = "111";        String str = desObj.strEnc(data, key1, key2, key3);        System.out.println(str);        String dec = desObj.strDec(str, key1, key2, key3);        System.out.println(dec);    }    /*     * 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;    }}