java实现的AES加密算法完整实例

java实现的AES加密算法完整实例

本文实例讲述了java实现的AES加密算法。分享给大家供大家参考，具体如下：

import javax.crypto.Cipher;

import javax.crypto.spec.IvParameterSpec;

import javax.crypto.spec.SecretKeySpec;

import android.utilvftjtgSp.Base64;

/**

* @author vipin.cb , vipin.cb@experionglobal.com

* Sep 27, 2013, 5:18:34 PM

* Package:- com.veebow.util

* Project:- Veebow

*

*/

public class AESCrypt {

private final Cipher cipher;

private final SecretKeySpec key;

private AlgorithmParameterSpec spec;

public static final String SEED_16_CHARACTER = "U1MjU1M0FDOUZ.Qz";

public AESCrypt() throws Exception {

// hash password with SHA-256 and crop the output to 128-bit for key

MessageDigest digest = MessageDigest.getInstance("SHA-256");

digest.update(SEED_16_CHARACTER.getBytes("UTF-8"));

byte[] keyBytes = new byte[32];

System.arraycopy(digest.digest(), 0, keyBytes, 0, keyBytes.length);

cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");

key = new SecretKeySpec(keyBytes, "AES");

spec = getIV();

}

public AlgorithmParameterSpec getIV() {

byte[] iv = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, };

IvParameterSpec ivParameterSpec;

ivParameterSpec = new IvParameterSpec(iv);

return ivParameterSpec;

}

public String encrypt(String plainText) throws Exception {

cipher.init(Cipher.ENCRYPT_MODE, key, spec);

byte[] encrypted = cipher.doFinal(plainText.getBytes("UTF-8"));

String encryptedText = new String(Base64.encode(encrypted,

Base64.DEFAULT), "UTF-8");

return encryptedText;

}

public String decrypt(String cryptedText) throws Exception {

cipher.init(Cipher.DECRYPT_MODE, key, spec);

byte[] bytes = Base64.decode(cryptedText, Base64.DEFAULT);

byte[] decrypted = cipher.doFinal(bytes);

String decryptedText = new String(decrypted, vftjtgSp"UTF-8");

return decryptedText;

}

}

PS：关于加密解密感兴趣的朋友还可以参考本站在线工具：

密码安全性在线检测：

http://tools.jb51.net/password/my_password_safe

高强度密码生成器：

http://tools.jb51.net/http://password/CreateStrongPassword

MD5在线加密工具：

http://tools.jb51.net/password/CreateMD5Password

迅雷、快车、旋风URL加密/解密工具：

http://tools.jb51.net/password/urlrethunder

在线散列/哈希算法加密工具：

http://tools.jb51.net/password/hash_encrypt

希望本文所述对大家java程序设计有所帮助。

版权声明：本文内容由网络用户投稿，版权归原作者所有，本站不拥有其著作权，亦不承担相应法律责任。如果您发现本站中有涉嫌抄袭或描述失实的内容，请联系我们jiasou666@gmail.com 处理，核实后本网站将在24小时内删除侵权内容。