java实现RSA非对称加密算法 对数据进行加密【附代码】
程序员文章站
2022-05-15 17:13:24
...
今天看了一下RSA非对称加密算法 上网搜索了许多资料 都没有找到比较详细的讲解和实现代码
后来和朋友交流了下数据交互 突然发现了数据加密的重要性 ,决定自己来写一篇关于非对称加密的文章 附上代码 看看怎么一步一步的实现rsa加密的
1、需要引入的包
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.util.Date;
import java.util.concurrent.ExecutionException;
import javax.crypto.Cipher;
import javax.xml.crypto.Data;
import sun.misc.BASE64Encoder;
2、编写Rsa类
public class Rsa {
}
3、写入rsa算法需要的方法
public class Rsa {
//生成**对
public static KeyPair genKeyPair(int keyLength) throws Exception{
KeyPairGenerator keyPairGenerator=KeyPairGenerator.getInstance("RSA");
keyPairGenerator.initialize(1024);
return keyPairGenerator.generateKeyPair();
}
//公钥加密
public static byte[] encrypt(byte[] content, PrivateKey publicKey) throws Exception{
Cipher cipher=Cipher.getInstance("RSA");//java默认"RSA"="RSA/ECB/PKCS1Padding"
cipher.init(Cipher.ENCRYPT_MODE, publicKey);
return cipher.doFinal(content);
}
//私钥解密
public static byte[] decrypt(byte[] content, PublicKey privateKey) throws Exception{
Cipher cipher=Cipher.getInstance("RSA");
cipher.init(Cipher.DECRYPT_MODE, privateKey);
return cipher.doFinal(content);
}
}
4、方法有了之后就可以开始进行操作打了 首先要有个概念 公匙加密 私匙解密 或者 私匙加密 公匙解密
首先准备一个需要加密的数据
public static String data="{date:'hellow',time:'2017-10-29'}";
5、有了数据之后准备公钥秘钥
//公钥秘钥
PublicKey publicKEY =keyPair.getPublic();
PrivateKey privateKey =keyPair.getPrivate();
//公钥加密
byte[] dataCode = encrypt(data.getBytes(),publicKEY);
System.out.println(base64.encode(dataCode));
//秘钥解密
byte[] dateprivate =decrypt(dataCode,privateKey);
System.out.println(new String(dateprivate));
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.util.Date;
import java.util.concurrent.ExecutionException;
import javax.crypto.Cipher;
import javax.xml.crypto.Data;
import sun.misc.BASE64Encoder;
public class Rsa {
public static String data="{date:'hellow',time:'2017-10-29'}";
public static void main(String[] args) throws Exception {
//base64编码对象
final BASE64Encoder base64 =new BASE64Encoder();
KeyPair keyPair=genKeyPair(1024);
//公钥秘钥
PublicKey publicKEY =keyPair.getPublic();
PrivateKey privateKey =keyPair.getPrivate();
//公钥加密
byte[] dataCode = encrypt(data.getBytes(),publicKEY);
System.out.println(base64.encode(dataCode));
System.out.println("");
//秘钥解密
byte[] dateprivate =decrypt(dataCode,privateKey);
System.out.println(new String(dateprivate));
}
//生成**对
public static KeyPair genKeyPair(int keyLength) throws Exception{
KeyPairGenerator keyPairGenerator=KeyPairGenerator.getInstance("RSA");
keyPairGenerator.initialize(1024);
return keyPairGenerator.generateKeyPair();
}
//公钥加密
public static byte[] encrypt(byte[] content, PublicKey publicKey) throws Exception{
Cipher cipher=Cipher.getInstance("RSA");//java默认"RSA"="RSA/ECB/PKCS1Padding"
cipher.init(Cipher.ENCRYPT_MODE, publicKey);
return cipher.doFinal(content);
}
//私钥解密
public static byte[] decrypt(byte[] content, PrivateKey privateKey) throws Exception{
Cipher cipher=Cipher.getInstance("RSA");
cipher.init(Cipher.DECRYPT_MODE, privateKey);
return cipher.doFinal(content);
}
}
8、运行结果