javaAES加密解密32位密钥

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;

public class Aes32 {
	//加密
	public String Encrypt(String str) {
        try{
        	String key = "11223344556677889900112233445566"; //密钥
            byte[] kb = key.getBytes("utf-8");
            SecretKeySpec sks = new SecretKeySpec(kb, "AES");
            Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");//算法/模式/补码方式
            cipher.init(Cipher.ENCRYPT_MODE, sks);
            byte[] eb = cipher.doFinal(str.getBytes("utf-8"));
            return new Base64().encodeToString(eb);
        }catch(Exception e){
            e.printStackTrace();
            return null;
        }
    }
	
	//解密
	public String Decrypt(String str) {
        try{
        	String key = "11223344556677889900112233445566"; //密钥
            byte[] kb = key.getBytes("utf-8");
            SecretKeySpec sks = new SecretKeySpec(kb, "AES");
            Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
            cipher.init(Cipher.DECRYPT_MODE, sks);
            byte[] by = new Base64().decode(str);
            byte[] db = cipher.doFinal(by);
            return new String(db);
        }catch(Exception e){
            e.printStackTrace();
            return null;
        }
    }
	
	public static void main(String[] args) throws Exception 
	{
		Aes32 aes=new Aes32();
		String en = aes.Encrypt("233");
		System.out.println("加密:"+en);
		
		String de = aes.Decrypt("yCzl6qlHZ4bBaMenO5s6Jw==");
		System.out.println("解密:"+de);
	}

}

看了很多AES加解密,不是报错,就是解密把已知明文加密后的byte[]直接解密,Excuse me?都知道明文了,我还特意加密一下然后再解密?

这还只是java,如果有其它语言开发的软件需要跟java对接呢?别人还会给你明文?

密钥长度限制,需要替换2个jar包local_policy.jar,US_export_policy.jar

然而版本对应下载替换后发现,仍然不行,网上说的都是替换C:Programe File(x86)Javajdk1.6.0_02jrelibsecurity下的2个包,

我把C:Programe File(x86)Javajre1.6.0_02jrelibsecurity下的包也替换了,发现仍然不行,

后来找到(AppData文件夹可能是隐藏的)MyEclipse引用的JER路径C:UsersAdministratorAppDataLocalGenuitecCommoninarycom.sun.java.jdk.win32.x86_1.6.0.013jrelibsecurity

替换这个路径下的2个jar包才搞定了.

总结了一下:JDK6需要替换jdk下的2个包、找到隐藏路径替换包.

其它版本JDK7或JDK8未测试

另附jdk包下载链接(链接参自http://www.cnblogs.com/yaks/p/5608358.html):

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