AES256 암복호화

개발환경

JDK 1.6

설치파일

commons-codec-1.10.jar

local_policy.jar

US_export_policy.jar

Apache Commons Codec(commons-codec-1.10.jar)

http://commons.apache.org/proper/commons-codec/download_codec.cgi

Java JCE Policy(local_policy.jar, US_export_policy.jar)

※ jdk버전에 맞게 아래에서 다운로드

jdk6

http://www.oracle.com/technetwork/java/javase/downloads/jce-6-download-429243.html

jdk7

http://www.oracle.com/technetwork/java/javase/downloads/jce-7-download-432124.html

jdk8

http://www.oracle.com/technetwork/java/javase/downloads/jce8-download-2133166.html

설치경로

프로젝트 라이브러리 경로/commons-codec-1.10.jar

JDK경로/jre/lib/security/local_policy.jar

JDK경로/jre/lib/security/US_export_policy.jar

소스

package com.boya.common.secure;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.spec.AlgorithmParameterSpec;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;

public class AES256Crypter {
    
    public static byte[] byteIv = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
    public static String strKey = "abcdefghijklmnopqrstuvwxyz012345";
    
    public static String encrypt(String strData) throws java.io.UnsupportedEncodingException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException {
        byte[] byteText = strData.getBytes("UTF-8");
        AlgorithmParameterSpec aps = new IvParameterSpec(byteIv);
        SecretKeySpec sks = new SecretKeySpec(strKey.getBytes("UTF-8"), "AES");
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, sks, aps);
        return Base64.encodeBase64String(cipher.doFinal(byteText));
    }
    
    public static String decrypt(String strData) throws java.io.UnsupportedEncodingException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException {
        byte[] byteText = Base64.decodeBase64(strData);
        AlgorithmParameterSpec aps = new IvParameterSpec(byteIv);
        SecretKeySpec sks = new SecretKeySpec(strKey.getBytes("UTF-8"), "AES");
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        cipher.init(Cipher.DECRYPT_MODE, sks, aps);
        return new String(cipher.doFinal(byteText), "UTF-8");
    }
}