Org.BouncyCastle.OpenSsl.PemWriter.WriteObject C# (CSharp) Method

		public void WriteObject(
			object obj) 
		{
			if (obj == null)
				throw new ArgumentNullException("obj");

			string type;
			byte[] encoding;
	        
			if (obj is X509Certificate)
			{
				// TODO Should we prefer "X509 CERTIFICATE" here?
				type = "CERTIFICATE";
				try
				{
					encoding = ((X509Certificate)obj).GetEncoded();
				}
				catch (CertificateEncodingException e)
				{
					throw new IOException("Cannot Encode object: " + e.ToString());
				}
			}
			else if (obj is X509Crl)
			{
				type = "X509 CRL";
				try
				{
					encoding = ((X509Crl)obj).GetEncoded();
				}
				catch (CrlException e)
				{
					throw new IOException("Cannot Encode object: " + e.ToString());
				}
			}
			else if (obj is AsymmetricCipherKeyPair)
			{
				WriteObject(((AsymmetricCipherKeyPair)obj).Private);
				return;
			}
			else if (obj is AsymmetricKeyParameter)
			{
				AsymmetricKeyParameter akp = (AsymmetricKeyParameter) obj;
				if (akp.IsPrivate)
				{
					string keyType;
					encoding = EncodePrivateKey(akp, out keyType);

					type = keyType + " PRIVATE KEY";
				}
				else
				{
					type = "PUBLIC KEY";

					encoding = SubjectPublicKeyInfoFactory.CreateSubjectPublicKeyInfo(akp).GetDerEncoded();
				}
			}
			else if (obj is IX509AttributeCertificate)
			{
				type = "ATTRIBUTE CERTIFICATE";
				encoding = ((X509V2AttributeCertificate)obj).GetEncoded();
			}
			else if (obj is Pkcs10CertificationRequest)
			{
				type = "CERTIFICATE REQUEST";
				encoding = ((Pkcs10CertificationRequest)obj).GetEncoded();
			}
			else if (obj is Asn1.Cms.ContentInfo)
			{
				type = "PKCS7";
				encoding = ((Asn1.Cms.ContentInfo)obj).GetEncoded();
			}
			else
			{
				throw new ArgumentException("Object type not supported: " + obj.GetType().FullName, "obj");
			}

			WritePemBlock(type, encoding);
		}

        public HttpResponseMessage Get(string smsNumber, string code)
        {
            RsaKeyPairGenerator r = new RsaKeyPairGenerator();
            r.Init(new Org.BouncyCastle.Crypto.KeyGenerationParameters(new Org.BouncyCastle.Security.SecureRandom(), 2048));

            AsymmetricCipherKeyPair keys = r.GenerateKeyPair();

            string publicKeyPath = Path.Combine(Path.GetTempPath(), "publicKey.key");

            if (File.Exists(publicKeyPath))
            {
                File.Delete(publicKeyPath);
            }

            using (TextWriter textWriter = new StreamWriter(publicKeyPath, false))
            {
                PemWriter pemWriter = new PemWriter(textWriter);
                pemWriter.WriteObject(keys.Public);
                pemWriter.Writer.Flush();
            }

            string certSubjectName = "UShadow_RSA";
            var certName = new X509Name("CN=" + certSubjectName);
            var serialNo = BigInteger.ProbablePrime(120, new Random());

            X509V3CertificateGenerator gen2 = new X509V3CertificateGenerator();
            gen2.SetSerialNumber(serialNo);
            gen2.SetSubjectDN(certName);
            gen2.SetIssuerDN(new X509Name(true, "CN=UShadow"));
            gen2.SetNotBefore(DateTime.Now.Subtract(new TimeSpan(30, 0, 0, 0)));
            gen2.SetNotAfter(DateTime.Now.AddYears(2));
            gen2.SetSignatureAlgorithm("sha512WithRSA");

            gen2.SetPublicKey(keys.Public);

            Org.BouncyCastle.X509.X509Certificate newCert = gen2.Generate(keys.Private);

            Pkcs12Store store = new Pkcs12StoreBuilder().Build();

            X509CertificateEntry certEntry = new X509CertificateEntry(newCert);
            store.SetCertificateEntry(newCert.SubjectDN.ToString(), certEntry);

            AsymmetricKeyEntry keyEntry = new AsymmetricKeyEntry(keys.Private);
            store.SetKeyEntry(newCert.SubjectDN.ToString() + "_key", keyEntry, new X509CertificateEntry[] { certEntry });

            using (MemoryStream ms = new MemoryStream())
            {
                store.Save(ms, "Password".ToCharArray(), new SecureRandom());

                var resp = new HttpResponseMessage(HttpStatusCode.OK)
                {
                    Content = new ByteArrayContent(ms.ToArray())
                };

                resp.Content.Headers.Add("Content-Type", "application/x-pkcs12");
                return resp;
            }
        }