ARIACipher.java

package egovframework.rte.fdl.cryptography.impl;

import java.security.InvalidKeyException;

import egovframework.rte.fdl.cryptography.impl.aria.ARIAEngine;
import egovframework.rte.fdl.cryptography.impl.aria.AnsiX923Padding;
import egovframework.rte.fdl.cryptography.impl.aria.CryptoPadding;

public class ARIACipher {
    /** 마스터 키 */
    String masterKey = null;

    /**
     * 암호 설정.
     * 
     * @param masterKey 암호문자열
     */
    public void setPassword(String masterKey) {
	masterKey = (masterKey.length() > 32 ? masterKey.substring(0, 32) : masterKey);

	this.masterKey = masterKey;
    }

    /**
     * 바이트 배열 리턴 암호화
     * 
     * @param data 암호화할 바이트배열
     * @return 암호화된 바이트배열
     */
    public byte[] encrypt(byte[] data) {
	try {
	    CryptoPadding padding = new AnsiX923Padding();
		
	    byte[] mk = padding.addPadding(masterKey.getBytes(), 32);
		
	    ARIAEngine instance = new ARIAEngine(256);
	    
	    return instance.encrypt(data, mk);
	} catch (InvalidKeyException ike) {
	    throw new RuntimeException(ike);
	}
    }

    /**
     * 복호화 배열 리턴 암호화.
     * 
     * @param encryptedData 복호화할 데이타 바이트배열
     * @return 복호화된 바이트배열
     */
    public byte[] decrypt(byte[] encryptedData) {
	try {
	    CryptoPadding padding = new AnsiX923Padding();
		
	    byte[] mk = padding.addPadding(masterKey.getBytes(), 32);
		
	    ARIAEngine instance = new ARIAEngine(256);
	    
	    return instance.decrypt(encryptedData, mk);
	} catch (InvalidKeyException ike) {
	    throw new RuntimeException(ike);
	}
    }
}