Org.BouncyCastle.X509.X509Certificate.GetEncoded C# (CSharp) Method

        public virtual byte[] GetEncoded()
        {
            return c.GetDerEncoded();
        }

        /// <summary>
        /// https://stackoverflow.com/questions/22230745/generate-a-self-signed-certificate-on-the-fly
        /// </summary>
        /// <param name="subjectName"></param>
        /// <param name="subjectKeyPair"></param>
        /// <param name="resultKeyPair"></param>
        /// <returns></returns>
        public static X509Certificate2 GenerateCaCertificate(
            string subjectName,
            out AsymmetricCipherKeyPair resultKeyPair,
            AsymmetricCipherKeyPair subjectKeyPair = null)
        {
            const int keyStrength = 2048;

            // Generating Random Numbers
            CryptoApiRandomGenerator randomGenerator = new CryptoApiRandomGenerator();
            SecureRandom             random          = new SecureRandom(randomGenerator);

            // The Certificate Generator
            X509V3CertificateGenerator certificateGenerator = new X509V3CertificateGenerator();

            // Serial Number
            BigInteger serialNumber = BigIntegers.CreateRandomInRange(BigInteger.One, BigInteger.ValueOf(long.MaxValue), random);

            certificateGenerator.SetSerialNumber(serialNumber);

            // Signature Algorithm
            const string signatureAlgorithm = "SHA256WithRSA";

            certificateGenerator.SetSignatureAlgorithm(signatureAlgorithm);

            // Issuer and Subject Name
            X509Name subjectDn = new X509Name(subjectName);
            X509Name issuerDn  = subjectDn;

            certificateGenerator.SetIssuerDN(issuerDn);
            certificateGenerator.SetSubjectDN(subjectDn);

            // Valid For
            DateTime notBefore = DateTime.UtcNow.Date;
            DateTime notAfter  = notBefore.AddYears(100);

            certificateGenerator.SetNotBefore(notBefore);
            certificateGenerator.SetNotAfter(notAfter);

            // Generate a key pair if none was provided
            if (subjectKeyPair == null)
            {
                KeyGenerationParameters keyGenerationParameters = new KeyGenerationParameters(random, keyStrength);
                RsaKeyPairGenerator     keyPairGenerator        = new RsaKeyPairGenerator();
                keyPairGenerator.Init(keyGenerationParameters);
                subjectKeyPair = keyPairGenerator.GenerateKeyPair();
            }

            certificateGenerator.SetPublicKey(subjectKeyPair.Public);

            // Generating the Certificate
            AsymmetricCipherKeyPair issuerKeyPair = subjectKeyPair;

            // Selfsign certificate
            Org.BouncyCastle.X509.X509Certificate certificate = certificateGenerator.Generate(issuerKeyPair.Private, random);
            X509Certificate2 x509 = new X509Certificate2(certificate.GetEncoded(), string.Empty, X509KeyStorageFlags.EphemeralKeySet);

            resultKeyPair = issuerKeyPair;

            return(x509);
        }