TryExportEncryptedPkcs8PrivateKey() [2/2]

unsafe override bool System.Security.Cryptography.ECDsa.TryExportEncryptedPkcs8PrivateKey ( ReadOnlySpan< char > password, PbeParameters pbeParameters, Span< byte > destination, out int bytesWritten )

inlinevirtualinherited

Reimplemented from System.Security.Cryptography.AsymmetricAlgorithm.

Reimplemented in System.Security.Cryptography.ECDsaImplementation.ECDsaCng, and System.Security.Cryptography.ECDsaCng.

Definition at line 591 of file ECDsa.cs.

    {
        if (pbeParameters == null)
        {
            throw new ArgumentNullException("pbeParameters");
        }
        PasswordBasedEncryption.ValidatePbeParameters(pbeParameters, password, ReadOnlySpan<byte>.Empty);
        ECParameters ecParameters = ExportParameters(includePrivateParameters: true);
        fixed (byte* ptr = ecParameters.D)
        {
            try
            {
                AsnWriter pkcs8Writer = EccKeyFormatHelper.WritePkcs8PrivateKey(ecParameters);
                AsnWriter asnWriter = KeyFormatHelper.WriteEncryptedPkcs8(password, pkcs8Writer, pbeParameters);
                return asnWriter.TryEncode(destination, out bytesWritten);
            }
            finally
            {
                CryptographicOperations.ZeroMemory(ecParameters.D);
            }
        }
    }

References System.Security.Cryptography.ECParameters.D, System.destination, System.Security.Cryptography.ECDsa.ExportParameters(), System.Formats.Asn1.AsnWriter.TryEncode(), System.Security.Cryptography.PasswordBasedEncryption.ValidatePbeParameters(), System.Security.Cryptography.KeyFormatHelper.WriteEncryptedPkcs8(), System.Security.Cryptography.EccKeyFormatHelper.WritePkcs8PrivateKey(), and System.Security.Cryptography.CryptographicOperations.ZeroMemory().