C#版本的sha256withRSA 私钥签名，公钥验签 方法，java<->.net通用

using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Security;
using System;
using System.Security.Cryptography;
using System.Text;

namespace ConsoleAppRSA
{
    class Program
    {
         
        static void Main(string[] args)
        {
            //原始数据：
            string data = "app_id=202406181252594586098860032&billIds=[\"SDGDFONC2406200054b\"]&biz_content={\"billIds\":[\"SDGDFONC2406200054b\"],\"bizCode\":\"orderProductionScheduled\"}&bizCode=orderProductionScheduled&charset=UTF-8&format=json&method=ihomeoms.customorder.syncStatus&sign_type=RSA2&timestamp=2024-06-20 17:18:12&version=1.0";
            //私钥：
            string privateKey = "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";
             
            Console.WriteLine("签名结果：");            
            string signData = Sign(data, privateKey);
            //Console.WriteLine("加密结果：");
            Console.WriteLine(signData);



            //公钥：
            string publceKey = "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1ntOThgPgpg9etj+YzVqiIr5Jgx2t6KFfJnKQAC/rk+UWfvAR5KLL1KTaLkaq+UYC2Sv9NjQiSfSXOgwSrvV2FiFdPaTgnjOzENnI9EaE0Q98/2Dj+NM+EvhoEdTg/JDro27EZRhPIM6VIWZKRGe2muEdMJFA6A75z/D/AIAf1Ai29vzn6Z6yJXZfidHoVDBbkLrSx7IicUEip5HkDsTkSrRAQuyh8bYJO6f1TehtO+OvlQS0lswTobA1rQBxqxE5IX+G/2rzF618fyIHqpJ6za3IBU8+mS54cLri3hUU3XT6r9oaKxGmZZXI/Al8rWxz5cfCcMGarcICuWYuerDIwIDAQAB";
 
            //验签：
            var verifyResult = VerifyData(data,signData, publceKey);
            Console.WriteLine("验签结果：");
            Console.WriteLine(verifyResult);

            Console.ReadLine();
        }
        public static string Sign(string contentForSign, string privateKey)
        {
            //转换成适用于.Net的秘钥
            var netKey = RSAPrivateKeyJava2DotNet(privateKey);
            var rsa = new RSACryptoServiceProvider();
            rsa.FromXmlString(netKey);
             
            //签名返回
            using (var sha256 = new SHA256CryptoServiceProvider())
            {
                var signData = rsa.SignData(Encoding.UTF8.GetBytes(contentForSign), sha256);                
                return Convert.ToBase64String(signData);
            }
        }
        public static string RSAPrivateKeyJava2DotNet(string privateKey)
        {
            RsaPrivateCrtKeyParameters privateKeyParam = (RsaPrivateCrtKeyParameters)PrivateKeyFactory.CreateKey(Convert.FromBase64String(privateKey));

            return string.Format("<RSAKeyValue><Modulus>{0}</Modulus><Exponent>{1}</Exponent><P>{2}</P><Q>{3}</Q><DP>{4}</DP><DQ>{5}</DQ><InverseQ>{6}</InverseQ><D>{7}</D></RSAKeyValue>",
                Convert.ToBase64String(privateKeyParam.Modulus.ToByteArrayUnsigned()),
                Convert.ToBase64String(privateKeyParam.PublicExponent.ToByteArrayUnsigned()),
                Convert.ToBase64String(privateKeyParam.P.ToByteArrayUnsigned()),
                Convert.ToBase64String(privateKeyParam.Q.ToByteArrayUnsigned()),
                Convert.ToBase64String(privateKeyParam.DP.ToByteArrayUnsigned()),
                Convert.ToBase64String(privateKeyParam.DQ.ToByteArrayUnsigned()),
                Convert.ToBase64String(privateKeyParam.QInv.ToByteArrayUnsigned()),
                Convert.ToBase64String(privateKeyParam.Exponent.ToByteArrayUnsigned()));
        }

        /// <summary>
        /// 验证签名
        /// </summary>
        /// <param name="data">原始数据</param>
        /// <param name="signData">用私钥签名原始数据得到的签名结果</param>
        /// <param name="publicKey">公钥</param>
        /// <returns></returns>
        public static bool VerifyData(string data,string signData, string publicKey)
        {
            //转换成适用于.Net的秘钥
            var netKey = RSAPublicKeyJava2DotNet(publicKey);
            var rsa = new RSACryptoServiceProvider();
            rsa.FromXmlString(netKey);
            
            //签名返回
            using (var sha256 = new SHA256CryptoServiceProvider())
            {

                return rsa.VerifyData(Encoding.UTF8.GetBytes(data), sha256, Convert.FromBase64String(signData));

            }
        }
         
        private static string RSAPublicKeyJava2DotNet(string publicKey)
        {
            RsaKeyParameters publicKeyParam = (RsaKeyParameters)PublicKeyFactory.CreateKey(Convert.FromBase64String(publicKey));
            return string.Format("<RSAKeyValue><Modulus>{0}</Modulus><Exponent>{1}</Exponent></RSAKeyValue>",
                Convert.ToBase64String(publicKeyParam.Modulus.ToByteArrayUnsigned()),
                Convert.ToBase64String(publicKeyParam.Exponent.ToByteArrayUnsigned()));
        }
    }
}