实现与JS相同的Des加解密算法【转】

简介: Java代码 import java.util.ArrayList; import java.util.List; /** * DES加密/解密 * * @Copyright Copyright (c) 2015 * @author liuyazh...

Java代码

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 = "admin";  
        String str = desObj.strEnc(data, key1, key2, key3);  
        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;  
    }  
}

Js代码(des.js):

/** 
* 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;    
}

html测试代码:

<!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">admin</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>  

转自:http://blog.csdn.net/l1028386804/article/details/50196061

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