对称算法--PBE

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1.用到的jar包：http://pan.baidu.com/s/1mgIbLvq提取码：ytj9
2.用法
3。代码实现：
package com.tan.sucurity;import java.security.Key;import java.security.NoSuchAlgorithmException;import java.security.SecureRandom;import java.security.spec.InvalidKeySpecException;import javax.crypto.Cipher;import javax.crypto.NoSuchPaddingException;import javax.crypto.SecretKeyFactory;import javax.crypto.spec.PBEKeySpec;import javax.crypto.spec.PBEParameterSpec;import org.apache.commons.codec.binary.Base64;import org.bouncycastle.asn1.pkcs.PBEParameter;/** * 功能：PEB算法 * @author TanZi * @time 2015年4月25日 上午10:05:40 */public class MyPBE {public static void main(String[] args) {//初始化盐SecureRandom random=new SecureRandom();byte[] salt=random.generateSeed(8);MyPBE myPBE=new MyPBE();byte[] result=myPBE.EncryptPBE("tanzi", "nihao",salt);System.out.println("加密："+Base64.encodeBase64String(result));result=myPBE.DecryptPBE("tanzi", result,salt);System.out.println("解密："+new String(result));}    /** * 功能：获取一个Key * @param password * @return */public Key toKey(String password){Key key=null;try {PBEKeySpec pbeKeySpec=new PBEKeySpec(password.toCharArray());SecretKeyFactory factory=SecretKeyFactory.getInstance("PBEWITHMD5andDES");key=factory.generateSecret(pbeKeySpec);} catch (Exception e) {e.printStackTrace();}return key;}/** * 功能：解密 * @param password 口令 * @param result  加密数据 * @param salt   盐 * @return      */public byte[] DecryptPBE(String password,byte[] result,byte[] salt){try {Key key=toKey(password);PBEParameterSpec pbeParameterSpec=new PBEParameterSpec(salt, 100);Cipher cipher=Cipher.getInstance("PBEWITHMD5andDES");cipher.init(Cipher.DECRYPT_MODE, key, pbeParameterSpec);result=cipher.doFinal(result);} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}return result;}/** * 功能：对数据的加密 * @param password 口令 * @param src      要加密的数据 * @param salt     盐 * @return */public byte[] EncryptPBE(String password,String src,byte[] salt){ byte[] result=null;//口令与密钥PBEKeySpec pbeKeySpec=new PBEKeySpec(password.toCharArray());try {SecretKeyFactory factory=SecretKeyFactory.getInstance("PBEWITHMD5andDES");    Key key=factory.generateSecret(pbeKeySpec);        //加密    PBEParameterSpec pbeParameterSpec=new PBEParameterSpec(salt, 100);    Cipher cipher=Cipher.getInstance("PBEWITHMD5andDES");    cipher.init(Cipher.ENCRYPT_MODE, key,pbeParameterSpec);    result=cipher.doFinal(src.getBytes());       } catch (Exception e) {e.printStackTrace();} return result;}}
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