ECDiffieHellmanPublicKey.cs

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using System.Formats.Asn1;
 
namespace System.Security.Cryptography;
 
public abstract class ECDiffieHellmanPublicKey : IDisposable
{
    private readonly byte[] _keyBlob;
 
    protected ECDiffieHellmanPublicKey()
    {
        _keyBlob = Array.Empty<byte>();
    }
 
    protected ECDiffieHellmanPublicKey(byte[] keyBlob)
    {
        if (keyBlob == null)
        {
            throw new ArgumentNullException("keyBlob");
        }
        _keyBlob = (byte[])keyBlob.Clone();
    }
 
    public void Dispose()
    {
        Dispose(disposing: true);
    }
 
    protected virtual void Dispose(bool disposing)
    {
    }
 
    public virtual byte[] ToByteArray()
    {
        return (byte[])_keyBlob.Clone();
    }
 
    public virtual string ToXmlString()
    {
        throw new NotImplementedException(System.SR.NotSupported_SubclassOverride);
    }
 
    public virtual ECParameters ExportParameters()
    {
        throw new NotSupportedException(System.SR.NotSupported_SubclassOverride);
    }
 
    public virtual ECParameters ExportExplicitParameters()
    {
        throw new NotSupportedException(System.SR.NotSupported_SubclassOverride);
    }
 
    public virtual bool TryExportSubjectPublicKeyInfo(Span<byte> destination, out int bytesWritten)
    {
        ECParameters ecParameters = ExportParameters();
        AsnWriter asnWriter = EccKeyFormatHelper.WriteSubjectPublicKeyInfo(ecParameters);
        return asnWriter.TryEncode(destination, out bytesWritten);
    }
 
    public virtual byte[] ExportSubjectPublicKeyInfo()
    {
        ECParameters ecParameters = ExportParameters();
        AsnWriter asnWriter = EccKeyFormatHelper.WriteSubjectPublicKeyInfo(ecParameters);
        return asnWriter.Encode();
    }
}