open-JSD-8709/src/main/java/com/fr/plugin/rcsso/utils/RSAUtil.java

package com.fr.plugin.rcsso.utils;

import org.apache.commons.codec.binary.Base64;

import javax.crypto.Cipher;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.security.KeyFactory;
import java.security.interfaces.RSAPrivateKey;
import java.security.spec.PKCS8EncodedKeySpec;

public class RSAUtil {
    public static void main(String[] args) throws Exception {
        // 密文
//        String message = "aFnvaH3EvOQYX/1zRMwueZvaEG/Oghm4aJ25HtEhYIEQAuLUMRpN9rAfL8a6DWoQ93Cm6bBlfNIRQE0HvDnb897ClmL9tXC3 rGjO8P5RXAuCTywpLHJI/774 z1iXsIi 50YoTDCyt1oKm1z2vc5QBr8EV8ivNk56mFC/s7LqY=";
        String message = URLDecoder.decode("G2xTxbkrjzgEA4YOryTOUYksyJX0uHnvrutmFgnZEtD291kuSI%2Bq5oEaetqBz%2BVBh3D4Pz9t2iFfyIgLP7NEs%2BoD10i2eh%2FFWKwPEucJ3Ls9XV2fqfkFwsiA6%2FHQZvdzLs5MnbFjZ2c4uk2atSkUUnRGZ8xk5T39h6D52Ep26zw%3D");
        System.out.println(URLEncoder.encode(message));
        // 私钥：请保存好
        String privateKey = "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";
        String messageDes = decrypt(message, privateKey);
        System.out.println("还原后的明文为:" + messageDes);

        //tokenid
    }

    /**
     * RSA私钥解密
     *
     * @param str        加密字符串
     * @param privateKey 私钥
     * @return 明文
     * @throws Exception 解密过程中的异常信息
     */
    public static String decrypt(String str, String privateKey) throws Exception {
        //64位解码加密后的字符串
        byte[] inputByte = Base64.decodeBase64(str.getBytes("UTF-8"));
        //base64编码的私钥
        byte[] decoded = Base64.decodeBase64(privateKey);
        RSAPrivateKey priKey = (RSAPrivateKey) KeyFactory.getInstance("RSA").generatePrivate(new PKCS8EncodedKeySpec(decoded));
        //RSA解密
        Cipher cipher = Cipher.getInstance("RSA");
        cipher.init(Cipher.DECRYPT_MODE, priKey);
        return new String(cipher.doFinal(inputByte));
    }
}