internal static void Decode(AsnReader reader, out SpecifiedECDomain decoded)
{
if (reader == null)
{
throw new ArgumentNullException(nameof(reader));
}
Decode(reader, Asn1Tag.Sequence, out decoded);
}
internal static void Decode(AsnReader reader, Asn1Tag expectedTag, out SpecifiedECDomain decoded)
{
if (reader == null)
{
throw new ArgumentNullException(nameof(reader));
}
decoded = default;
AsnReader sequenceReader = reader.ReadSequence(expectedTag);
if (!sequenceReader.TryReadUInt8(out decoded.Version))
{
sequenceReader.ThrowIfNotEmpty();
}
System.Security.Cryptography.Asn1.FieldID.Decode(sequenceReader, out decoded.FieldID);
System.Security.Cryptography.Asn1.CurveAsn.Decode(sequenceReader, out decoded.Curve);
if (sequenceReader.TryReadPrimitiveOctetStringBytes(out ReadOnlyMemory <byte> tmpBase))
{
decoded.Base = tmpBase;
}
else
{
decoded.Base = sequenceReader.ReadOctetString();
}
decoded.Order = sequenceReader.ReadIntegerBytes();
if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(Asn1Tag.Integer))
{
decoded.Cofactor = sequenceReader.ReadIntegerBytes();
}
if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(Asn1Tag.ObjectIdentifier))
{
decoded.Hash = sequenceReader.ReadObjectIdentifier();
}
sequenceReader.ThrowIfNotEmpty();
}
internal static void Decode(ref AsnValueReader reader, Asn1Tag expectedTag, ReadOnlyMemory <byte> rebind, out SpecifiedECDomain decoded)
{
try
{
DecodeCore(ref reader, expectedTag, rebind, out decoded);
}
catch (AsnContentException e)
{
throw new CryptographicException(SR.Cryptography_Der_Invalid_Encoding, e);
}
}
private static void DecodeCore(ref AsnValueReader reader, Asn1Tag expectedTag, ReadOnlyMemory <byte> rebind, out SpecifiedECDomain decoded)
{
decoded = default;
AsnValueReader sequenceReader = reader.ReadSequence(expectedTag);
ReadOnlySpan <byte> rebindSpan = rebind.Span;
int offset;
ReadOnlySpan <byte> tmpSpan;
if (!sequenceReader.TryReadInt32(out decoded.Version))
{
sequenceReader.ThrowIfNotEmpty();
}
System.Security.Cryptography.Asn1.FieldID.Decode(ref sequenceReader, rebind, out decoded.FieldID);
System.Security.Cryptography.Asn1.CurveAsn.Decode(ref sequenceReader, rebind, out decoded.Curve);
if (sequenceReader.TryReadPrimitiveOctetString(out tmpSpan))
{
decoded.Base = rebindSpan.Overlaps(tmpSpan, out offset) ? rebind.Slice(offset, tmpSpan.Length) : tmpSpan.ToArray();
}
else
{
decoded.Base = sequenceReader.ReadOctetString();
}
tmpSpan = sequenceReader.ReadIntegerBytes();
decoded.Order = rebindSpan.Overlaps(tmpSpan, out offset) ? rebind.Slice(offset, tmpSpan.Length) : tmpSpan.ToArray();
if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(Asn1Tag.Integer))
{
tmpSpan = sequenceReader.ReadIntegerBytes();
decoded.Cofactor = rebindSpan.Overlaps(tmpSpan, out offset) ? rebind.Slice(offset, tmpSpan.Length) : tmpSpan.ToArray();
}
if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(Asn1Tag.ObjectIdentifier))
{
decoded.Hash = sequenceReader.ReadObjectIdentifier();
}
sequenceReader.ThrowIfNotEmpty();
}
internal static void Decode(ref AsnValueReader reader, ReadOnlyMemory <byte> rebind, out SpecifiedECDomain decoded)
{
Decode(ref reader, Asn1Tag.Sequence, rebind, out decoded);
}