JAVA_AesCBC例子

时间:2023-04-03 17:18:07
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec; import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder; /**
* 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;
* 正确
*/
public class AesCBC {
/*已确认
* 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="1234567890123456";
private static String ivParameter="1234567890123456";
private static AesCBC instance=null;
//private static
private AesCBC(){ }
public static AesCBC getInstance(){
if (instance==null)
instance= new AesCBC();
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 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 = "123456";
System.out.println("加密前的字串是:"+cSrc);
// 加密
String enString = AesCBC.getInstance().encrypt(cSrc,"utf-8",sKey,ivParameter);
System.out.println("加密后的字串是:"+ enString); System.out.println("1jdzWuniG6UMtoa3T6uNLA==".equals(enString)); // 解密
String DeString = AesCBC.getInstance().decrypt(enString,"utf-8",sKey,ivParameter);
System.out.println("解密后的字串是:" + DeString);
}
}