public static Asn1Node ReadNode(Stream stream)
{
var identifier = stream.ReadByte();
var type = (Asn1UniversalNodeType)(identifier & 0x1f);
var tagClass = (Asn1TagClass)(identifier >> 6);
var tagForm = (Asn1TagForm)((identifier >> 5) & 1);
var length = ReadTagLength(stream);
if (length > stream.Length)
{
throw new Asn1ParsingException($"Try to read more bytes from stream than exists {length} > {stream.Length}");
}
var data = new byte[length];
stream.Read(data, 0, length);
stream = new MemoryStream(data);
if (tagClass == Asn1TagClass.Universal)
{
var tag = ReadUniversalNode(type, tagForm, stream);
tag.TagClass = tagClass;
return(tag);
}
else
{
var tag = Asn1CustomNode.ReadFrom(type, tagForm, stream);
tag.TagClass = tagClass;
return(tag);
}
}
public static Asn1Node ReadNode(Stream stream)
{
var identifier = stream.ReadByte();
Asn1UniversalNodeType type = (Asn1UniversalNodeType)(identifier & 0x1f);
Asn1TagClass tagClass = (Asn1TagClass)(identifier >> 6);
Asn1TagForm tagForm = (Asn1TagForm)((identifier >> 5) & 1);
int?length = ReadTagLength(stream);
if (identifier == 0 && length == 0)
{
return(null); // EOC detected
}
if (length > stream.Length)
{
throw new Asn1ParsingException($"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 static Asn1Node ReadNode(Stream stream)
{
var identifier = stream.ReadByte();
var type = (Asn1UniversalNodeType)(identifier & 0x1f);
var tagClass = (Asn1TagClass)(identifier >> 6);
var tagForm = (Asn1TagForm)((identifier >> 5) & 1);
var length = ReadTagLength(stream);
var data = new byte[length];
stream.Read(data, 0, 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);
}
}