JS前端DES加密参数

DES加密为可解密的机制,这里使用DES进行加密方便后台解密还原参数值。本文的功能中des.js与Des.java作用相同,在不同地方产生作用。在登录的页面引入des.js文件,后台写个Des.java类,然后在登录验证前调用即可,方便易用。

jsp页面js函数与表单改造:
注意:要让表单中明文文本框不提交,只需将该文本框的name属性去掉即可。前后台加解密的三个密码字符串要一直。
<script type="text/javascript">
function setPass(originId,decId){
	var orginName = window.parent.document.getElementById('orginName').value;
	var newName = strEnc(orginName,'itmp','des','encrypt');
	window.parent.document.getElementById('userId').value = newName;
	
	var orginPass = window.parent.document.getElementById(originId).value;
	var newPass = strEnc(orginPass,'itmp','des','encrypt');
	//alert('newPass=' + newPass + ' pass='+strDec(newPass,'itmp','des','encrypt'));
	window.parent.document.getElementById(decId).value = newPass;
}
</script>

<form id="form" name="form" action="${ctx}/j_spring_security_check" method="post">
	<table width="100%" border="0" cellspacing="0" cellpadding="0">
 	 <tr>
     	<td width="20%" height="10" class="black14" align="center" valign="middle"></td>
     	<td colspan="2" align="left">
        	<div class="error${param.error==true?'':'hide'}" style="color:red;">
		${sessionScope['SPRING_SECURITY_LAST_EXCEPTION'].message}
		</div>
    	</td>
    </tr>
   <tr>
     <td width="20%" height="35" class="black14">用户名</td>
     <td colspan="2" align="left"><label >
       <input type="text" id="orginName" value="${sessionScope['SPRING_SECURITY_LAST_USERNAME']}" class="input" />
       <input type="hidden" id="userId" name="j_username" value="" class="input"/>
     </label></td>
   </tr>
   <tr>
     <td height="35" class="black14">密&nbsp;&nbsp;&nbsp;码</td>
     <td colspan="2" align="left"><label >
       <input type="password" id="orginPass" class="input" onblur="setPass('orginPass','password');"/>
       <input type="hidden" name="j_password" id="password" class="input"/>
     </label></td>
   </tr>
   <tr>
     <td height="35" class="black14">验证码</td>
     <td width="37%" align="left"><label>
       <input type="text" name="validateCode" class="input2"/>
     </label></td>
     <td width="43%" align="left">
     	<img onclick="this.src='kaptcha.validate'" src="kaptcha.validate" width="77" height="28" />
     </td>
   </tr>
   <tr>
     <td height="93" colspan="3" align="center">
     	<a href="#">
     		<input type="image" src="${ctx}/css/remake/images/button_login.gif" width="111" height="36" border="0" />
     	</a>
     </td>
   </tr>
 </table>
</form>


后台登录验证调用Des的解密方法进行解密
Des des = new Des();
String pass=des.strDec(orginPass, 'itmp','des','encrypt');


后台加解密类Des.java代码如下:
package com.eshore.itmp.model.web.security;

import java.util.ArrayList;
import java.util.List;

/**
 * 页面端加密解密处理类
 * 
 * @author ahomeeye
 * 
 */
public class Des {
	
	public Des() {
	}

	/*
	 * 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;
	}

	public static void main(String[] args) {
		Des desObj = new Des();
		String key1 = "itmp";//des1(orginPass, "itmp", "des", "encrypt");
		String key2 = "des";
		String key3 = "encrypt";
		String data = "1";
		String str = desObj.strEnc(data, key1, key2, key3);
		System.out.println(str);
		String dec = desObj.strDec(str, key1, key2, key3);
		System.out.println(dec);
	}
}


前台des.js加解密代码如下
/**
* DES加密解密
* @Copyright Copyright (c) 2006
* @author Guapo
* @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;  
}
//end-------------------------------------------------------------------------------------------------------------
/*从后台请求加密密码字符串*/
function findDes(){
	var jsonStr;
	$.ajax({
		//以那一种方法向服务器请求数据
		type:"POST",
		//向那个资源发送请求
		url:"${ctx}/Login!findDesKey.do",
		//处理什么类型的数据
		dataType:"html",
		async:false,
		//根据返回数据进行什么处理
		success:function(returnedData){

			//判断是否禁止撤单
			if(returnedData!=null || returnedData !=""){
				jsonStr = eval('(' + returnedData + ')'); 
			}else{
				alert('des返回失败!请检查控件是否被禁用。'+jsonStr);
			}   					
		}
		
	});
	return jsonStr;
} 

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