c#关于RSA私钥解密的问题

[zhu5152]

需求：私钥解密，对方提供私钥，和加密文本，我们进行解密。
但是在解密的时候报参数错误
rsa.Decrypt(dataToDec, false) 这句话会报参数错误

  /// <summary>
        /// RSA的解密函数  stirng
        /// </summary>
        /// <param name="privateKey">私钥</param>
        /// <param name="ciphertext">密文字符串</param>
        /// <returns></returns>
        public static string Decrypt(string privateKey, string ciphertext)
        {
            return Decrypt(privateKey, Convert.FromBase64String(ciphertext));
        }

        /// <summary>
        /// RSA的解密函数  byte
        /// </summary>
        /// <param name="privateKey">私钥</param>
        /// <param name="cipherbytes">密文字节数组</param>
        /// <returns></returns>
        public static string Decrypt(string privateKey, byte[] cipherbytes)
        {
            using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider())
            {
                //rsa.FromXmlString(Encoding.UTF8.GetString(Convert.FromBase64String(privateKey)));
                rsa.FromXmlString(privateKey);
                int keySize = rsa.KeySize / 8;
                byte[] buffer = new byte[keySize];
                using (MemoryStream msInput = new MemoryStream(cipherbytes))
                {
                    using (MemoryStream msOutput = new MemoryStream())
                    {
                        int readLen;

                        while ((readLen = msInput.Read(buffer, 0, keySize)) > 0)
                        {
                            byte[] dataToDec = new byte[readLen];
                            Array.Copy(buffer, 0, dataToDec, 0, readLen);
                            byte[] decData = rsa.Decrypt(dataToDec, false);
                            msOutput.Write(decData, 0, decData.Length);
                        }

                        byte[] result = msOutput.ToArray();
                        rsa.Clear();

                        return Encoding.UTF8.GetString(result);
                    }
                }
            }
        }

密文：（16进制编码后的）4C788BAE2C7BCD05855BFD5F1E29C104AEEDCF34A4DC4325E0663699E7108D87EBCE5FDB945B64D73E2FFABE878C7A26498C5E961B716CD25C26309E0A6E9717E6F67D750233790AC2666DFBB1F675F2BC42C0C17E9A266FECFC1C3BDBF524001406E2D59EA4FF96C2ADDBD422FC4C3E02F3FA50B2BDF51F6C72004417B4E5D8| （最后个‘|’可能是多余的）

私钥:MIICdgIBADANBgkqhkiG9w0BAQEFAASCAmAwggJcAgEAAoGBAIYKBEmcf03qYeVRV9P+Gal/bV+8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[zhu5152]

在CSDN上拜读了 几篇 ‘娃都会打酱油了’大神的博客 还是百思不得其解

[zhu5152]

来接分了 有人么

[泡泡龙]

我来了，分给我就行