AES-128-CBC进行加密与解密
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
public class AESUtil {
/**
* AES 是一种可逆加密算法，对用户的敏感信息加密处理
* 对原始数据进行AES加密后，在进行Base64编码转化；
*/
/*
* 加密用的Key 可以用26个字母和数字组成
* 此处使用AES-128-CBC加密模式，key需要为16位。
*/
private static String sKey = "主密钥";
private static String ivParameter = "偏移量";
private static AESUtil instance = null;
private AESUtil() {
}
public static AESUtil getInstance() {
if (instance == null)
instance = new AESUtil();
return instance;
}
// 加密
public String encrypt(String sSrc, String encodingFormat, String sKey, String ivParameter) throws Exception {
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
byte[] raw = sKey.getBytes();
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
IvParameterSpec iv = new IvParameterSpec(ivParameter.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(encodingFormat));
return new BASE64Encoder().encode(encrypted);//此处使用BASE64做转码。
}
// 解密
public static String decrypt(String sSrc, String encodingFormat, String sKey, String ivParameter) throws Exception {
try {
byte[] raw = sKey.getBytes("ASCII");
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
IvParameterSpec iv = new IvParameterSpec(ivParameter.getBytes());
cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
byte[] encrypted1 = new BASE64Decoder().decodeBuffer(sSrc);//先用base64解密
byte[] original = cipher.doFinal(encrypted1);
String originalString = new String(original, encodingFormat);
return originalString;
} catch (Exception ex) {
return null;
}
}
public static void main(String[] args) throws Exception {
// 需要加密的字串
String cSrc = "需要加密的字串";
System.out.println(cSrc);
// 加密
long lStart = System.currentTimeMillis();
String enString = AESUtil.getInstance().encrypt(cSrc,"utf-8",sKey,ivParameter);
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 = AESUtil.getInstance().decrypt(cSrc,"utf-8",sKey,ivParameter);
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");
}
}