encryption.java

来自「一个简单的实现Kerberos验证的程序」· Java 代码 · 共 37 行

/**
 * RSA加密解码相关类
 */
package src;

import javax.crypto.*;
import java.security.*;

public class Encryption{	
	String plainText;
	String cipher;
	public Encryption()
	{}
	public Encryption(String pText)
	{
		this.plainText = pText;
	}
	public byte[] encrypt(String plain,Key k)throws Exception
	{
		byte[] plainText= plain.getBytes("UTF8");
		Cipher cipher=Cipher.getInstance("RSA/ECB/PKCS1Padding");
		System.out.println("\n"+cipher.getProvider().getInfo());
		cipher.init(Cipher.ENCRYPT_MODE,k);
		byte[] cipherText=cipher.doFinal(plainText);
		return cipherText;
	}
	
	public String decrypt(byte[] t,Key k) throws Exception
	{
		Cipher cipher=Cipher.getInstance("RSA");
		cipher.init(Cipher.DECRYPT_MODE,k);
		byte[] newPlainText = cipher.doFinal(t);
		return new String(newPlainText,"UTF8");
	}
	
}