Java RSA/ECB/OAEPWITHHA-256和MGF1填充在C#Bouncy Castle中-输入对RSA密码来说太大

您好，我正在尝试将一段Java代码转换为C#，以便使用RSA密钥进行解密

Java代码

import javax.crypto.Cipher;
import javax.crypto.spec.OAEPParameterSpec;
import javax.crypto.spec.PSource;

import sun.misc.BASE64Decoder;
public static String decryptWithRSAKey(String encryptedString, Key pk) throws Exception {
        
        Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
        
        Cipher cipher = Cipher.getInstance("RSA/ECB/OAEPWITHSHA-256ANDMGF1PADDING");
        OAEPParameterSpec oaepParameterSpec = new OAEPParameterSpec("SHA-256", "MGF1", MGF1ParameterSpec.SHA256, PSource.PSpecified.DEFAULT);
        cipher.init(Cipher.DECRYPT_MODE, pk,oaepParameterSpec);        
        return new String(cipher.doFinal(new BASE64Decoder().decodeBuffer(encryptedString)),"UTF-8");//1.6.031->rt.jar -> sun.misc.Base64Decoder 
    }

C#代码

触发

PrivateKeyfilePath =PATH TO PRIVATE KEY
RSAPrivateKey privateKey1 = (RSAPrivateKey)objAc.GetPrivate(PrivateKeyfilePath);

var rsaPri1 = new Org.BouncyCastle.Crypto.Parameters.RsaKeyParameters(true, new Org.BouncyCastle.Math.BigInteger(privateKey1.getModulus().ToString()),
                    new Org.BouncyCastle.Math.BigInteger(privateKey1.getPrivateExponent().ToString()));
String decryptedAESKeyString = RSAEncryptionWithAES.DecryptWithRSAKey(encryptedResponseKey, rsaPri1);

运行时，我得到的错误输入对于RSA密码来说太大

如何在C#Bouncy Castle中正确指定密码RSA/ECB/OAEPTHHA-256和MGF1padding

此外，对于与此相关的RSA密码，错误输入是否太大？

因此C代码在功能上与Java代码相对应，在C代码

加密字符串中，必须在解密之前对其进行Base64解码（而不是UTF8编码）。解密数据必须经过UTF8解码（而不是Base64编码）：

PrivateKeyfilePath =PATH TO PRIVATE KEY
RSAPrivateKey privateKey1 = (RSAPrivateKey)objAc.GetPrivate(PrivateKeyfilePath);

var rsaPri1 = new Org.BouncyCastle.Crypto.Parameters.RsaKeyParameters(true, new Org.BouncyCastle.Math.BigInteger(privateKey1.getModulus().ToString()),
                    new Org.BouncyCastle.Math.BigInteger(privateKey1.getPrivateExponent().ToString()));
String decryptedAESKeyString = RSAEncryptionWithAES.DecryptWithRSAKey(encryptedResponseKey, rsaPri1);

public static string DecryptWithRSAKey(string encryptedString, RsaKeyParameters pk)
{
    var decrypter = new OaepEncoding(new RsaEngine(), new Sha256Digest(), new Sha256Digest(), null);
    decrypter.Init(false, pk);
    var encryptedBytes = Convert.FromBase64String(encryptedString);
    var decrypted = decrypter.ProcessBlock(encryptedBytes, 0, encryptedBytes.Length);
    return Encoding.UTF8.GetString(decrypted);
}