internal static void Decode(AsnReader reader, out CurveAsn decoded) { if (reader == null) throw new ArgumentNullException(nameof(reader)); Decode(reader, Asn1Tag.Sequence, out decoded); }
internal static void Decode(AsnReader reader, Asn1Tag expectedTag, out CurveAsn decoded) { if (reader == null) { throw new ArgumentNullException(nameof(reader)); } decoded = default; AsnReader sequenceReader = reader.ReadSequence(expectedTag); if (sequenceReader.TryReadPrimitiveOctetStringBytes(out ReadOnlyMemory <byte> tmpA)) { decoded.A = tmpA; } else { decoded.A = sequenceReader.ReadOctetString(); } if (sequenceReader.TryReadPrimitiveOctetStringBytes(out ReadOnlyMemory <byte> tmpB)) { decoded.B = tmpB; } else { decoded.B = sequenceReader.ReadOctetString(); } if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(Asn1Tag.PrimitiveBitString)) { if (sequenceReader.TryReadPrimitiveBitStringValue(out _, out ReadOnlyMemory <byte> tmpSeed)) { decoded.Seed = tmpSeed; } else { decoded.Seed = sequenceReader.ReadBitString(out _); } } sequenceReader.ThrowIfNotEmpty(); }
internal static void Decode(ref AsnValueReader reader, Asn1Tag expectedTag, ReadOnlyMemory <byte> rebind, out CurveAsn 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 CurveAsn decoded) { decoded = default; AsnValueReader sequenceReader = reader.ReadSequence(expectedTag); ReadOnlySpan <byte> rebindSpan = rebind.Span; int offset; ReadOnlySpan <byte> tmpSpan; if (sequenceReader.TryReadPrimitiveOctetString(out tmpSpan)) { decoded.A = rebindSpan.Overlaps(tmpSpan, out offset) ? rebind.Slice(offset, tmpSpan.Length) : tmpSpan.ToArray(); } else { decoded.A = sequenceReader.ReadOctetString(); } if (sequenceReader.TryReadPrimitiveOctetString(out tmpSpan)) { decoded.B = rebindSpan.Overlaps(tmpSpan, out offset) ? rebind.Slice(offset, tmpSpan.Length) : tmpSpan.ToArray(); } else { decoded.B = sequenceReader.ReadOctetString(); } if (sequenceReader.HasData && sequenceReader.PeekTag().HasSameClassAndValue(Asn1Tag.PrimitiveBitString)) { if (sequenceReader.TryReadPrimitiveBitString(out _, out tmpSpan)) { decoded.Seed = rebindSpan.Overlaps(tmpSpan, out offset) ? rebind.Slice(offset, tmpSpan.Length) : tmpSpan.ToArray(); } else { decoded.Seed = sequenceReader.ReadBitString(out _); } } sequenceReader.ThrowIfNotEmpty(); }
internal static void Decode(ref AsnValueReader reader, ReadOnlyMemory <byte> rebind, out CurveAsn decoded) { Decode(ref reader, Asn1Tag.Sequence, rebind, out decoded); }