Initilization Package Means Caching
2013-01-04 14:03
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<Source>http://www.cnblogs.com/arix04/archive/2009/10/15/1511839.html
AES加解密算法,使用Base64做转码以及辅助加密:
AES加解密算法,使用Base64做转码以及辅助加密:
package com.wintv.common; import javax.crypto.Cipher; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; import sun.misc.BASE64Decoder; import sun.misc.BASE64Encoder; /******************************************************************************* * AES加解密算法 * * @author arix04 * */ public class AES { // 加密 public static String Encrypt(String sSrc, String sKey) throws Exception { if (sKey == null) { System.out.print("Key为空null"); return null; } // 判断Key是否为16位 if (sKey.length() != 16) { System.out.print("Key长度不是16位"); return null; } byte[] raw = sKey.getBytes(); SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES"); Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");//"算法/模式/补码方式" IvParameterSpec iv = new IvParameterSpec("0102030405060708".getBytes());//使用CBC模式,需要一个向量iv,可增加加密算法的强度 cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv); byte[] encrypted = cipher.doFinal(sSrc.getBytes()); return new BASE64Encoder().encode(encrypted);//此处使用BASE64做转码功能,同时能起到2次加密的作用。 } // 解密 public static String Decrypt(String sSrc, String sKey) throws Exception { try { // 判断Key是否正确 if (sKey == null) { System.out.print("Key为空null"); return null; } // 判断Key是否为16位 if (sKey.length() != 16) { System.out.print("Key长度不是16位"); return null; } byte[] raw = sKey.getBytes("ASCII"); SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES"); Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); IvParameterSpec iv = new IvParameterSpec("0102030405060708" .getBytes()); cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv); byte[] encrypted1 = new BASE64Decoder().decodeBuffer(sSrc);//先用base64解密 try { byte[] original = cipher.doFinal(encrypted1); String originalString = new String(original); return originalString; } catch (Exception e) { System.out.println(e.toString()); return null; } } catch (Exception ex) { System.out.println(ex.toString()); return null; } } public static void main(String[] args) throws Exception { /* * 加密用的Key 可以用26个字母和数字组成,最好不要用保留字符,虽然不会错,至于怎么裁决,个人看情况而定 * 此处使用AES-128-CBC加密模式,key需要为16位。 */ String cKey = "1234567890123456"; // 需要加密的字串 String cSrc = "Email : arix04@xxx.com"; System.out.println(cSrc); // 加密 long lStart = System.currentTimeMillis(); String enString = AES.Encrypt(cSrc, cKey); System.out.println("加密后的字串是:" + enString); long lUseTime = System.currentTimeMillis() - lStart; System.out.println("加密耗时:" + lUseTime + "毫秒"); // 解密 lStart = System.currentTimeMillis(); String DeString = AES.Decrypt(enString, cKey); System.out.println("解密后的字串是:" + DeString); lUseTime = System.currentTimeMillis() - lStart; System.out.println("解密耗时:" + lUseTime + "毫秒"); } }
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