1、加密
1）页面引入JS
<script type="text/javascript" src="<%=path%>/js/jquery-1.8.0.min.js"></script>
<script type="text/javascript" src="./aes/tripledes.js"></script>
<script type="text/javascript" src="./aes/mode-ecb.js"></script>
2）DES加密方法
function encryptByDES(message, key) { var keyHex = CryptoJS.enc.Utf8.parse(key); var encrypted = CryptoJS.DES.encrypt(message, keyHex, { mode: CryptoJS.mode.ECB, padding: CryptoJS.pad.Pkcs7 }); return encrypted.toString(); }
3）账号密码加密
var username= onm.val(); username= encryptByDES(username, "kEHrDooxWHCWtfeSxvDvgqZq"); var password= ops.val(); password= encryptByDES(password, "kEHrDooxWHCWtfeSxvDvgqZq"); $.post(contextPath + "/Login/login.do", { "username" : username, "password" : password }, function(result) { //debugger; if (result == null) { setErrMsg("登陆失败！"); unlockBtnLogin(); ......
2、解密
String username = request.getParameter("username");
//des解密后账号
String desUserName=DESUtil.decryption(username, "kEHrDooxWHCWtfeSxvDvgqZq");
String password = request.getParameter("password");
//des解密后密码
String desPassword=DESUtil.decryption(password, "kEHrDooxWHCWtfeSxvDvgqZq");
DESUtil.java
package com.util; import java.security.InvalidKeyException; import java.security.NoSuchAlgorithmException; import java.security.spec.InvalidKeySpecException; import javax.crypto.BadPaddingException; import javax.crypto.Cipher; import javax.crypto.IllegalBlockSizeException; import javax.crypto.NoSuchPaddingException; import javax.crypto.SecretKey; import javax.crypto.SecretKeyFactory; import javax.crypto.spec.DESKeySpec; /** * DES加解密工具类 * * @author 王翔宇 * * @date 2017年7月19日 上午11:03:51 */ public class DESUtil { private static final String DES_ALGORITHM = "DES"; /** * DES加密 * * @param plainData 原始字符串 * @param secretKey 加密密钥 * @return 加密后的字符串 * @throws Exception */ public static String encryption(String plainData, String secretKey) throws Exception { Cipher cipher = null; try { cipher = Cipher.getInstance(DES_ALGORITHM); cipher.init(Cipher.ENCRYPT_MODE, generateKey(secretKey)); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } catch (NoSuchPaddingException e) { e.printStackTrace(); } catch (InvalidKeyException e) { } try { // 为了防止解密时报javax.crypto.IllegalBlockSizeException: Input length must // be multiple of 8 when decrypting with padded cipher异常， // 不能把加密后的字节数组直接转换成字符串 byte[] buf = cipher.doFinal(plainData.getBytes()); return Base64Utils.encode(buf); } catch (IllegalBlockSizeException e) { e.printStackTrace(); throw new Exception("IllegalBlockSizeException", e); } catch (BadPaddingException e) { e.printStackTrace(); throw new Exception("BadPaddingException", e); } } /** * DES解密 * @param secretData 密码字符串 * @param secretKey 解密密钥 * @return 原始字符串 * @throws Exception */ public static String decryption(String secretData, String secretKey) throws Exception { Cipher cipher = null; try { cipher = Cipher.getInstance(DES_ALGORITHM); cipher.init(Cipher.DECRYPT_MODE, generateKey(secretKey)); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); throw new Exception("NoSuchAlgorithmException", e); } catch (NoSuchPaddingException e) { e.printStackTrace(); throw new Exception("NoSuchPaddingException", e); } catch (InvalidKeyException e) { e.printStackTrace(); throw new Exception("InvalidKeyException", e); } try { byte[] buf = cipher.doFinal(Base64Utils.decode(secretData.toCharArray())); return new String(buf); } catch (IllegalBlockSizeException e) { e.printStackTrace(); throw new Exception("IllegalBlockSizeException", e); } catch (BadPaddingException e) { e.printStackTrace(); throw new Exception("BadPaddingException", e); } } /** * 获得秘密密钥 * * @param secretKey * @return * @throws NoSuchAlgorithmException * @throws InvalidKeySpecException * @throws InvalidKeyException */ private static SecretKey generateKey(String secretKey) throws NoSuchAlgorithmException, InvalidKeySpecException, InvalidKeyException { SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES_ALGORITHM); DESKeySpec keySpec = new DESKeySpec(secretKey.getBytes()); keyFactory.generateSecret(keySpec); return keyFactory.generateSecret(keySpec); } static private class Base64Utils { static private char[] alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=" .toCharArray(); static private byte[] codes = new byte[256]; static { for (int i = 0; i < 256; i++) codes[i] = -1; for (int i = ‘A‘; i <= ‘Z‘; i++) codes[i] = (byte) (i - ‘A‘); for (int i = ‘a‘; i <= ‘z‘; i++) codes[i] = (byte) (26 + i - ‘a‘); for (int i = ‘0‘; i <= ‘9‘; i++) codes[i] = (byte) (52 + i - ‘0‘); codes[‘+‘] = 62; codes[‘/‘] = 63; } /** * 将原始数据编码为base64编码 */ static private String encode(byte[] data) { char[] out = new char[((data.length + 2) / 3) * 4]; for (int i = 0, index = 0; i < data.length; i += 3, index += 4) { boolean quad = false; boolean trip = false; int val = (0xFF & (int) data[i]); val <<= 8; if ((i + 1) < data.length) { val |= (0xFF & (int) data[i + 1]); trip = true; } val <<= 8; if ((i + 2) < data.length) { val |= (0xFF & (int) data[i + 2]); quad = true; } out[index + 3] = alphabet[(quad ? (val & 0x3F) : 64)]; val >>= 6; out[index + 2] = alphabet[(trip ? (val & 0x3F) : 64)]; val >>= 6; out[index + 1] = alphabet[val & 0x3F]; val >>= 6; out[index + 0] = alphabet[val & 0x3F]; } return new String(out); } /** * 将base64编码的数据解码成原始数据 */ static private byte[] decode(char[] data) { int len = ((data.length + 3) / 4) * 3; if (data.length > 0 && data[data.length - 1] == ‘=‘) --len; if (data.length > 1 && data[data.length - 2] == ‘=‘) --len; byte[] out = new byte[len]; int shift = 0; int accum = 0; int index = 0; for (int ix = 0; ix < data.length; ix++) { int value = codes[data[ix] & 0xFF]; if (value >= 0) { accum <<= 6; shift += 6; accum |= value; if (shift >= 8) { shift -= 8; out[index++] = (byte) ((accum >> shift) & 0xff); } } } if (index != out.length) throw new Error("miscalculated data length!"); return out; } } }