package com.tr.common.util.encrypt;import java.security.InvalidKeyException;import java.security.NoSuchAlgorithmException;import java.security.SecureRandom;import java.security.Security;import javax.crypto.BadPaddingException;import javax.crypto.Cipher;import javax.crypto.IllegalBlockSizeException;import javax.crypto.KeyGenerator;import javax.crypto.NoSuchPaddingException;import javax.crypto.SecretKey;import com.tr.ODJ.util.Constants;/** * AES 加密解密类 * * * */public class EncrypAES {// KeyGenerator 提供对称密钥生成器的功能，支持各种算法private static KeyGenerator keygen;// SecretKey 负责保存对称密钥private static SecretKey deskey;// Cipher负责完成加密或解密工作private static Cipher c;// 该字节数组负责保存加密的结果private static byte[] cipherByte;static {Security.addProvider(new com.sun.crypto.provider.SunJCE());// 实例化支持DES算法的密钥生成器(算法名称命名需按规定，否则抛出异常)try {keygen = KeyGenerator.getInstance("AES");} catch (NoSuchAlgorithmException e) {// TODO Auto-generated catch blocke.printStackTrace();}// 生成密钥keygen.init(new SecureRandom("这是密匙".getBytes()));deskey = keygen.generateKey();// 生成Cipher对象,指定其支持的DES算法try {c = Cipher.getInstance("AES");} catch (NoSuchAlgorithmException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (NoSuchPaddingException e) {// TODO Auto-generated catch blocke.printStackTrace();}}//public EncrypAES() throws NoSuchAlgorithmException, NoSuchPaddingException {//Security.addProvider(new com.sun.crypto.provider.SunJCE());//// 实例化支持DES算法的密钥生成器(算法名称命名需按规定，否则抛出异常)//keygen = KeyGenerator.getInstance("AES");//// 生成密钥//deskey = keygen.generateKey();//// 生成Cipher对象,指定其支持的DES算法//c = Cipher.getInstance("AES");//}/** * 对字符串加密 * * @param str * @return * @throws InvalidKeyException * @throws IllegalBlockSizeException * @throws BadPaddingException */public static String Encrytor(String str) throws InvalidKeyException,IllegalBlockSizeException, BadPaddingException {// 根据密钥，对Cipher对象进行初始化，ENCRYPT_MODE表示加密模式c.init(Cipher.ENCRYPT_MODE, deskey);byte[] src = str.getBytes();// 加密，结果保存进cipherBytecipherByte = c.doFinal(src);return parseByte2HexStr(cipherByte);}/** * 对字符串解密 * * @param buff * @return * @throws InvalidKeyException * @throws IllegalBlockSizeException * @throws BadPaddingException */public static String Decryptor(String buff) throws InvalidKeyException,IllegalBlockSizeException, BadPaddingException {// 根据密钥，，对Cipher对象进行初始化，DECRYPT_MODE表示加密模式c.init(Cipher.DECRYPT_MODE, deskey);cipherByte = c.doFinal(parseHexStr2Byte(buff));return new String(cipherByte);} /** * @param args * @throws NoSuchPaddingException * @throws NoSuchAlgorithmException * @throws BadPaddingException * @throws IllegalBlockSizeException * @throws InvalidKeyException */ public static void main(String[] args) throws Exception { EncrypAES de1 = new EncrypAES(); String msg ="lp;l;l;jmhj"; String encontent = de1.Encrytor(msg); String decontent = de1.Decryptor(encontent); System.out.println("明文是:" + msg); System.out.println("加密后:" + new String(encontent)); System.out.println("解密后:" + new String(decontent)); }/** * 将二进制转换成16进制 * * @param buf * @return */public static String parseByte2HexStr(byte buf[]) {StringBuffer sb = new StringBuffer();for (int i = 0; i < buf.length; i++) {String hex = Integer.toHexString(buf[i] & 0xFF);if (hex.length() == 1) {hex = '0' + hex;}sb.append(hex.toUpperCase());}return sb.toString();}/** * 将16进制转换为二进制 * * @param hexStr * @return */public static byte[] parseHexStr2Byte(String hexStr) {if (hexStr.length() < 1)return null;byte[] result = new byte[hexStr.length() / 2];for (int i = 0; i < hexStr.length() / 2; i++) {int high = Integer.parseInt(hexStr.substring(i * 2, i * 2 + 1), 16);int low = Integer.parseInt(hexStr.substring(i * 2 + 1, i * 2 + 2),16);result[i] = (byte) (high * 16 + low);}return result;}}
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