private static Asn1Node ReadUniversalNode(Asn1UniversalNodeType type, Asn1TagForm tagForm, Stream stream) { switch (type) { case Asn1UniversalNodeType.Boolean: return(Asn1Boolean.ReadFrom(stream)); case Asn1UniversalNodeType.Integer: return(Asn1Integer.ReadFrom(stream)); case Asn1UniversalNodeType.BitString: return(Asn1BitString.ReadFrom(stream)); case Asn1UniversalNodeType.OctetString: return(Asn1OctetString.ReadFrom(stream)); case Asn1UniversalNodeType.Null: return(Asn1Null.ReadFrom(stream)); case Asn1UniversalNodeType.ObjectId: return(Asn1ObjectIdentifier.ReadFrom(stream)); case Asn1UniversalNodeType.Utf8String: return(Asn1Utf8String.ReadFrom(stream)); case Asn1UniversalNodeType.PrintableString: return(Asn1PrintableString.ReadFrom(stream)); case Asn1UniversalNodeType.Ia5String: return(Asn1Ia5String.ReadFrom(stream)); case Asn1UniversalNodeType.UtcTime: return(Asn1UtcTime.ReadFrom(stream)); case Asn1UniversalNodeType.Sequence: return(Asn1Sequence.ReadFrom(stream)); case Asn1UniversalNodeType.Set: return(Asn1Set.ReadFrom(stream)); default: throw new NotSupportedException($"unsupported universal type {type}"); } }
public static Asn1CustomNode ReadFrom(Asn1UniversalNodeType type, Asn1TagForm tagForm, Stream stream) { if (tagForm == Asn1TagForm.Primitive) { var data = new byte[stream.Length]; stream.Read(data, 0, data.Length); return(new Asn1CustomNode((int)type, tagForm) { Data = data }); } else { var res = new Asn1CustomNode((int)type, tagForm); res.ReadChildren(stream); return(res); } }
public static Asn1Node ReadNode(Stream stream) { var identifier = stream.ReadByte(); Asn1UniversalNodeType type = (Asn1UniversalNodeType)(identifier & 0x1f); Asn1TagClass tagClass = (Asn1TagClass)(identifier >> 6); Asn1TagForm tagForm = (Asn1TagForm)((identifier >> 5) & 1); int?length = ReadTagLength(stream); if (identifier == 0 && length == 0) { return(null); // EOC detected } if (length > stream.Length) { throw new Asn1ParsingException($"Try to read more bytes from stream than exists {length} > {stream.Length}"); } if (length != null) { var data = new byte[(int)length]; stream.Read(data, 0, (int)length); stream = new MemoryStream(data); if (tagClass == Asn1TagClass.Universal) { var tag = ReadUniversalNode(type, tagForm, stream); tag.TagClass = tagClass; return(tag); } else { var tag = Asn1CustomNode.ReadFrom(type, tagForm, stream); tag.TagClass = tagClass; return(tag); } } else { // We must just keep on reading the stream rather than keeping a separate memory buffer Asn1DynamicArray tag = Asn1DynamicArray.ReadFrom(type, stream); tag.TagClass = tagClass; return(tag); } }
public Asn1CustomNode(int type, Asn1TagForm tagForm, Asn1TagClass tagClass) { Type = (Asn1UniversalNodeType)type; TagForm = tagForm; TagClass = tagClass; }
public Asn1CustomNode(int type, Asn1TagForm tagForm) { Type = (Asn1UniversalNodeType)type; TagForm = tagForm; }