public byte[] Export(
KeyBlobFormat format)
{
byte[] blob;
int blobSize;
if (format < 0)
{
if (_handle.IsClosed)
{
throw Error.ObjectDisposed_Key();
}
if ((_exportPolicy & KeyExportPolicies.AllowPlaintextExport) == 0)
{
if ((_exportPolicy & KeyExportPolicies.AllowPlaintextArchiving) == 0)
{
throw Error.InvalidOperation_ExportNotAllowed();
}
if (_exported)
{
throw Error.InvalidOperation_AlreadyArchived();
}
}
_exported = true;
_algorithm.TryExportKey(_handle, format, Span <byte> .Empty, out blobSize);
blob = new byte[blobSize];
if (!_algorithm.TryExportKey(_handle, format, blob, out blobSize))
{
throw Error.Cryptographic_InternalError();
}
Debug.Assert(blobSize == blob.Length);
return(blob);
}
else
{
if (_publicKey == null)
{
throw Error.Argument_FormatNotSupported(nameof(format), format.ToString());
}
_algorithm.TryExportPublicKey(_publicKey.Bytes, format, Span <byte> .Empty, out blobSize);
blob = new byte[blobSize];
if (!_algorithm.TryExportPublicKey(_publicKey.Bytes, format, blob, out blobSize))
{
throw Error.Cryptographic_InternalError();
}
Debug.Assert(blobSize == blob.Length);
return(blob);
}
}
public byte[] Export(
KeyBlobFormat format)
{
byte[] blob;
int blobSize;
if (format < 0)
{
if (_handle.IsClosed)
{
throw Error.ObjectDisposed_Key();
}
bool allowExport = (_flags & KeyFlags.AllowExport) != 0;
bool allowArchiving = (_flags & KeyFlags.AllowArchiving) != 0;
if (!allowExport)
{
if (!allowArchiving)
{
throw Error.InvalidOperation_ExportNotAllowed();
}
if (_exported)
{
throw Error.InvalidOperation_AlreadyArchived();
}
}
_exported = true;
if (_algorithm.TryExportKey(_handle, format, Span <byte> .Empty, out blobSize))
{
Debug.Assert(blobSize == 0);
return(Utilities.Empty <byte>());
}
blob = new byte[blobSize];
if (_algorithm.TryExportKey(_handle, format, blob, out blobSize))
{
Debug.Assert(blobSize == blob.Length);
return(blob);
}
throw Error.Cryptographic_InternalError();
}
else
{
if (_publicKey == null)
{
throw Error.Argument_FormatNotSupported(nameof(format), format.ToString());
}
if (_algorithm.TryExportPublicKey(_publicKey.Bytes, format, Span <byte> .Empty, out blobSize))
{
Debug.Assert(blobSize == 0);
return(Utilities.Empty <byte>());
}
blob = new byte[blobSize];
if (_algorithm.TryExportPublicKey(_publicKey.Bytes, format, blob, out blobSize))
{
Debug.Assert(blobSize == blob.Length);
return(blob);
}
throw Error.Cryptographic_InternalError();
}
}