public override unsafe bool TryExportPkcs8PrivateKey(
Span <byte> destination,
out int bytesWritten)
{
ECParameters ecParameters = ExportParameters(true);
fixed(byte *privPtr = ecParameters.D)
{
try
{
using (AsnWriter writer = ecParameters.WritePkcs8PrivateKey())
{
return(writer.TryEncode(destination, out bytesWritten));
}
}
finally
{
CryptographicOperations.ZeroMemory(ecParameters.D);
}
}
}
public override unsafe bool TryExportEncryptedPkcs8PrivateKey(
ReadOnlySpan <char> password,
PbeParameters pbeParameters,
Span <byte> destination,
out int bytesWritten)
{
if (pbeParameters == null)
{
throw new ArgumentNullException(nameof(pbeParameters));
}
PasswordBasedEncryption.ValidatePbeParameters(
pbeParameters,
password,
ReadOnlySpan <byte> .Empty);
ECParameters ecParameters = ExportParameters(true);
fixed(byte *privPtr = ecParameters.D)
{
try
{
using (AsnWriter pkcs8PrivateKey = ecParameters.WritePkcs8PrivateKey())
using (AsnWriter writer = KeyFormatHelper.WriteEncryptedPkcs8(
password,
pkcs8PrivateKey,
pbeParameters))
{
return(writer.TryEncode(destination, out bytesWritten));
}
}
finally
{
CryptographicOperations.ZeroMemory(ecParameters.D);
}
}
}