package net.oschina.crypto;

import java.security.Key;
import java.security.NoSuchAlgorithmException;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;

 
 
 
 
public abstract class   RC2Coder {



	/*
	 * 
	 * @return
	 * @throws NoSuchAlgorithmException
	 */
	public static byte[] initKey() throws NoSuchAlgorithmException {
		KeyGenerator kg = KeyGenerator.getInstance(KEY_ALGORITHM);
		//kg.init(256);
		SecretKey secretKey = kg.generateKey();
		return secretKey.getEncoded();

	}

	/**
	 * 加密
	 * 
	 * @param data
	 * @param key
	 * @return
	 * @throws Exception
	 */
	public static byte[] encypt(byte[] data, byte[] key) throws Exception {
		Key key2 = toKey(key);
		Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
		cipher.init(Cipher.ENCRYPT_MODE, key2);
		return cipher.doFinal(data);

	}

	/**
	 * 
	 * @param key
	 * @return
	 * @throws Exception
	 */
	private static Key toKey(byte[] key) throws Exception {
		SecretKey secretKey = new SecretKeySpec(key, KEY_ALGORITHM);
		return secretKey;
	}

	/**
	 * 
	 * 解密
	 * @param data 数据
	 * @param key 密钥
	 * @return
	 * @throws Exception
	 */
	public static byte[] decypt(byte[] data, byte[] key) throws Exception {
		Key key2 = toKey(key);
		Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
		cipher.init(Cipher.DECRYPT_MODE, key2);
		return cipher.doFinal(data);
	}

	/**
	 * 
	 */
	public static final String KEY_ALGORITHM = "RC2";

	public static final String CIPHER_ALGORITHM = "RC2/ECB/PKCS5Padding";
}

@@ -233,16 +233,35 @@
 ec;%0A%0A %0A 
+/**%0A %0A RC2 %E7%AE%97%E6%B3%95%E5%AE%9E%E7%8E%B0%0A */
 %0A %0A %0Apub

Update RC2Coder.java