public static Asn1DynamicArray ReadFrom(Asn1UniversalNodeType type, Stream stream) { Asn1DynamicArray array = new Asn1DynamicArray(type); Asn1Node node; while ((node = Asn1Node.ReadNode(stream)) != null) { array.Nodes.Add(node); } return(array); }
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); } }