Flask接口签名sign原理与实例代码浅析
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2023-02-10
Java实现RSA算法的方法详解
本文实例讲述了java实现RSA算法的方法。分享给大家供大家参考,具体如下:
一 介绍
唯一广泛接受并实现
用于数据加密和数字签名
公钥加密、私钥解密
私钥加密、公钥解密
二 RSA参数说明
三 实现
package com.imooc.security.rsa;
import java.security.KeyFactory;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import javax.crypto.Cipher;
import org.apache.commons.codec.binary.Base64;
public class ImoocRSA {
private static String src = "cakin24 security rsa";
public static void main(String[] args) {
jdkRSA();
}
public static void jdkRSA() {
try {
//1.初始化密钥
KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");
keyPairGenerator.initialize(512);
KeyPair keyPair = keyPairGenerator.generateKeyPair();
RSAPublicKey rsaPublicKey = (RSAPublicKey)keyPair.getPublic();
RSAPrivateKey rsaPrivateKey = (RSAPrivateKey)keyPair.getPrivate();
System.out.println("Public Key : " + Base64.encodeBase64String(rsaPublicKey.getEncoded()));
System.out.println("Private Key : " + Base64.encodeBase64String(rsaPrivateKey.getEncoded()));
//2.私钥加密、公钥解密——加密
PKCS8EncodedKeySpec pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(rsaPrivateKey.getEncoded());
KeyFactory keyFactory = KeyFactory.getInstance("RSA");
PrivateKey privateKey = keyFactory.generatePrivate(pkcs8EncodedKeySpec);
Cipher cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.ENCRYPT_MODE, privateKey);
byte[] result = cipher.doFinal(src.getBytes());
System.out.println("私钥加密、公钥解密——加密 : " + Base64.encodeBase64String(result));
//3.私钥加密、公钥解密——解密
X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(rsaPublicKey.getEncoded());
keyFactory = KeyFactory.getInstance("RSA");
PublicKey publicKey = keyFactory.generatePublic(x509EncodedKeySpec);
cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.DECRYPT_MODE, publicKey);
result = cipher.doFinal(result);
System.out.println("私钥加密、公钥解密——解密:" + new String(result));
//4.公钥加密、私钥解密——加密
x509EncodedKeySpec = new X509EncodedKeySpec(rsaPublicKey.getEncoded());
keyFactory = KeyFactory.getInstance("RSA");
publicKey = keyFactory.generatePublic(x509EncodedKeySpec);
cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.ENCRYPT_MODE, publicKey);
result = cipher.doFinal(src.getBytes());
JPqOBfBd System.out.println("公钥加密、私钥解密——加密 : " + Base64.encodeBase64String(result));
//5.公钥加密、私钥解密——解密
pkcs8EncodedJPqOBfBdKeySpec = new PKCS8EncodedKeySpec(rsaPrivateKey.getEncoded());
keyFactory = KeyFactory.getInstance("RSA");
privateKey = keyFactory.generatePrivate(pkcs8EncodedKeySpec);
cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.DECRYPT_MODE, privateKey);
result = cipher.doFinal(result);
System.out.println("公钥加密、私钥解密——解密:" + new String(result));
} catch (Exception e) {
e.printStackTrace();
}
}
}
四 实现效果
Public Key : MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBAJcBeOb97IdkkirBmx3MOY5e4eRwh0uvC2BcNlY1rDo0lZ8ibR1bl1RJXWkHv7U0ASO/5DBlnnnGbQRtsJlsCPMCAwEAAQ==
Private Key : MIIBVAIBADANBgkqhkiG9w0BAQEFAASCAT4wggE6AgEAAkEAlwF45v3sh2SSKsGbHcw5jl7h5HCHS68LYFw2VjWsOjsVnyJtHVuXVEldaQe/tTQBI7/kMGWeecZtBG2wmWwI8wIDAQABAkAdSkPRSl+ew3s2n+cemIZxfyYB0XHs1D84qapAfpixkUNvWL0A4ovrwsnwt4MEjAtWVTufNvTxIZcZdx+Q5DbBAiEA9TzzYMGRU+3mdlAx0ICF+NIqwvlqyvedKa4KSx55gVUCIQCdoeX6mqGRP78aQjYKWeogwliszjU5fN/LFvKZrcgBJwIhAMvbBLzzaykHY0IKW75kd/lkSyOUTY+20bAp+miDRqGZAiA6r36eeRkzqUbtcL8LxYPb5F79HtxD5dCvnIB/ZGp0uwIgWtXI7IxHjYCsNomSJdu1J3dU9KqQuW/eOHxrk/OgUYE=
私钥加密、公钥解密——加密 : VjkFsOiVeLvKES5RprhsJK9tdTzohdELLS7yluidCYEe7DkuCM9srj8kwadynHI4M0oLAfJhK6447hp7Ia8x7A==
私钥加密、公钥解密——解密:cakin24 security rsa
公钥加密、私钥解密——加密 : gAWl73UxHtO+EfKkpmfMdhtK0Vh7HB8n+30l1Hp8aAMIagD21h2x/q/Ns+soGsOXNovuNzaSGZenmZzcjB4VEA==
公钥加密、私钥解密——解密:cakin24 security rsa
五 应用场景
PS:关于加密解密感兴趣的朋友还可以参考本站在线工具:
在线RSA加密/解密工具:
http://tools.jb51.net/password/rsa_encode
文字在线加密解密工具(包含AES、DES、RC4等):
http://tools.jb51.net/password/txt_encode
MD5在线加密工具:
http://tools.jb51.net/password/CreateMD5Password
在线散列/哈希算法加密工具:
http://tools.jb51.net/password/hash_encrypt
在线MD5/hash/SHA-1/SHA-2/SHA-256/SHA-512/SHA-3/RIPEMD-160加密工具:
http://tools.jb51.net/password/hash_md5_sha
在线sha1/sha224/sha256/sha384/sha512加密工具:
http://tools.jb51.net/password/sha_encode
更多关于java相关内容感兴趣的读者可查看本站专题:《Java数学运算技巧总结》、《Java数据结构与算法教程》、《Java字符与字符串操作技巧总结》、《Java操作DOM节点技巧总结》和《Java缓存操作技巧汇总》
希望本文所述对大家java程序设计有所帮助。
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