AES加密算法的java实现.docx

package com.encryp;import java.security.InvalidKeyException;import java.security.NoSuchAlgorithmException;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;public class EncrypAES { // KeyGenerator 提供对称密钥生成器的功能，支持各种算法 private KeyGenerator keygen; // SecretKey 负责保存对称密钥 private SecretKey deskey; // Cipher负责完成加密或解密工作 private Cipher c; // 该字节数组负责保存加密的结果 private byte[] cipherByte; 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 byte[] 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cipherByte cipherByte = c.doFinal(src); return cipherByte; } /** * 对字符串解密 * * @param buff * @return * @throws InvalidKeyException * @throws IllegalBlockSizeException * @throws BadPaddingException */ public byte[] Decryptor(byte[] 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(buff); return 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 = 郭XX-搞笑相声全