Rsa加密解密C#(dotnet)和java互通

RSA加密解密C#与Java互通方案

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已于 2023-10-27 23:10:00 修改 · 585 阅读

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#c# #java #算法

于 2023-10-17 13:52:31 首次发布

Rsa 非对称加密解密互通推荐使用三方包快捷方便

bouncycastle.org

Legion of the Bouncy Castle Inc (github.com)

工具

通过代码生成或则使用openssl生成秘钥

推荐安装openssl

OpenSSL的github地址：GitHub - openssl/openssl: TLS/SSL and crypto library

windows电脑安装包

下载地址：Win32/Win64 OpenSSL Installer for Windows - Shining Light Productions

生成证书命令

生成私钥

openssl genrsa -out private.key 2048

生成一个X.509公钥证书文件

openssl req -new -x509 -key private.key -out publickey.cer -days 365

合并正式pfx文件（C# windows使用）

openssl pkcs12 -export -out certificate.pfx -inkey private.key -in publickey.cer

生成一个rsa公钥

openssl rsa -pubout -in private.key -out publickey.pem

使用场景

数据传输加密解密
jwt生成令牌
其他接口使用

秘钥内容规范

公钥私钥都是使用base64字符串
通过公钥或私钥加密后的字符串也是base64
只有解密后的字符串明文

测试秘钥

私钥

String privateKey =        "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";

公钥

String publicKey = "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvoUGdCiy6eIEXJuyoNiBb+sc1sWeB3YuMSGwsBzbes6bQgNezwtKTtNRdo+TM3lk3aKAo93PsN7NoVY7RC+9gKG3VjYo785tcZBlzboeqAZ3DwoIMU2Ct+/Q64XB3pb3VvERiMGOqpA37UKxD2qG0iBt2E9OyfRub1h6O/I55E3MibT9X8G2RDQ80YIgWVkQ9D4Hi3y9xO8JuUyezzkTbgyxfka2iwoZYwGCyJaUWUe9SOXh/HepZmMmj7oJ9EBUzPUXphL9PU0l8PNCkl+s7qD/0SEiRT0RuQSNOdC1Us3gP4jSm1O6nZ9wkOBm3piSeWA0s8JfndrmXOmSDoxw0wIDAQAB";

JAVA代码

引入mvn包

<!-- https://mvnrepository.com/artifact/org.bouncycastle/bcprov-jdk16 -->
<dependency>    
    <groupId>org.bouncycastle</groupId>    
    <artifactId>bcprov-jdk16</artifactId>    
    <version>1.46</version>
</dependency>

java 帮助类

import org.bouncycastle.crypto.AsymmetricBlockCipher;
import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
import org.bouncycastle.crypto.KeyGenerationParameters;
import org.bouncycastle.crypto.encodings.PKCS1Encoding;
import org.bouncycastle.crypto.engines.RSAEngine;
import org.bouncycastle.crypto.generators.RSAKeyPairGenerator;
import org.bouncycastle.crypto.params.AsymmetricKeyParameter;
import org.bouncycastle.crypto.params.RSAKeyGenerationParameters;
import org.bouncycastle.crypto.params.RSAKeyParameters;
import org.bouncycastle.crypto.util.PrivateKeyFactory;
import org.bouncycastle.crypto.util.PublicKeyFactory;
import org.bouncycastle.util.encoders.Base64;

import java.math.BigInteger;
import java.security.SecureRandom;
import java.nio.charset.StandardCharsets;

public class RSAUtil {
    public static String RSA_ALGORITHM = "RSA";
    public static String UTF8 = "UTF-8";

    public static class KeyStore {
        private String publicKey;
        private String privateKey;

        public String getPublicKey() {
            return publicKey;
        }

        public void setPublicKey(String publicKey) {
            this.publicKey = publicKey;
        }

        public String getPrivateKey() {
            return privateKey;
        }

        public void setPrivateKey(String privateKey) {
            this.privateKey = privateKey;
        }
    }
    /**
     * 创建公钥私钥
     */
    public static KeyStore createKeys() {
        try {

            AsymmetricCipherKeyPair keyPair = getAsymmetricCipherKeyPair();
            RSAKeyParameters publicKey = (RSAKeyParameters) keyPair.

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