public Asn1UtcTime(Asn1Document document, TaggedObject content, Asn1Object parentObject)
: base(document, content, parentObject)
{
var ascii = Encoding.ASCII.GetString(content.Workload);
dateTime = DateTime.ParseExact(ascii,
UtcFormats, CultureInfo.InvariantCulture, DateTimeStyles.None);
}
public Asn1Object CreateAsn1Object(
Asn1Document document,
TaggedObject content,
Asn1Object parent)
{
Asn1Object result = null;
try
{
if (document.ShowInvalidTaggedObjects && IsInvalidTaggedObject(content))
return new Asn1InvalidObject(document, (InvalidTaggedObject)content, parent);
var tagValue = content.Tag.Value;
if (!tagValue.IsUniversalClass())
{
var specific = CreateSpecificTaggedObject(document, content, parent);
return specific ?? CreateUnsupportedTaggedObject(document, content, parent);
}
var asn1TagValue = tagValue.GetAsn1TagValue();
switch (asn1TagValue)
{
case (int)Asn1Tags.Boolean:
return new Asn1Boolean(document, content, parent);
case (int)Asn1Tags.Integer:
return new Asn1Integer(document, content, parent);
case (int)Asn1Tags.BitString:
return new Asn1BitString(document, content, parent);
case (int)Asn1Tags.OctetString:
return new Asn1OctetString(document, content, parent);
case (int)Asn1Tags.Null:
return new Asn1Null(document, content, parent);
case (int)Asn1Tags.ObjectIdentifier:
return new Asn1Oid(document, content, parent);
case (int)Asn1Tags.Utf8String:
return new Asn1Utf8String(document, content, parent);
case (int)Asn1Tags.Sequence:
return new Asn1Sequence(document, content, parent);
case (int)Asn1Tags.Set:
return new Asn1Set(document, content, parent);
case (int)Asn1Tags.NumericString:
return new Asn1NumericString(document, content, parent);
case (int)Asn1Tags.PrintableString:
return new Asn1PrintableString(document, content, parent);
case (int)Asn1Tags.UtcTime:
return new Asn1UtcTime(document, content, parent);
default:
var specific = CreateSpecificTaggedObject(document, content, parent);
return specific ?? CreateUnsupportedTaggedObject(document, content, parent);
}
}
catch (Exception ex)
{
// Could not create a "real" ASN1 object --> return the special "Unsupported" object.
log.Error(ex);
result = CreateUnsupportedTaggedObject(document, content, parent, ex);
}
return result;
}
internal Asn1Object(Asn1Document document, TaggedObject content, Asn1Object parentObject)
{
if (content == null) throw new ArgumentNullException("content");
TaggedObject = content;
Document = document;
Parent = parentObject;
}
private Asn1Object CreateUnsupportedTaggedObject(Asn1Document document, TaggedObject content, Asn1Object parent, Exception exception = null)
{
if (exception != null)
return new Asn1Unsupported(document, content, parent, exception);
var tagValue = content.Tag.Value;
if (tagValue.IsContextSpecificClass())
return new Asn1ContextSpecific(document, content, parent);
return new Asn1Unsupported(document, content, parent);
}
public Asn1Integer(Asn1Document document, TaggedObject content, Asn1Object parentObject)
: base(document, content, parentObject)
{
long value = 0L;
foreach (byte element in content.Workload)
{
value <<= 8;
value += element;
}
Value = value;
}
protected override Asn1Object CreateSpecificTaggedObject(Asn1Document document, TaggedObject content, Asn1Object parent)
{
var result = base.CreateSpecificTaggedObject(document, content, parent);
if (result != null)
return result;
var tag = content.Tag.Value;
if (tag == (ushort)Tags.Icao.Mrz)
return new Asn1Mrz(document, content, parent);
return null;
}
protected override Asn1Object CreateSpecificTaggedObject(Asn1Document document, TaggedObject content, Asn1Object parent)
{
var asn1 = base.CreateSpecificTaggedObject(document, content, parent);
if (asn1 != null)
return asn1;
var tagValue = content.Tag.Value;
var ef = Tags.FindEF(tagValue);
if (!ef.HasValue)
return null;
switch (ef.Value)
{
case Tags.EF.DG1:
return new Asn1DG1Data(document, content, parent);
}
return null;
}
protected virtual void ParseContent()
{
var taggedObjects = TaggedObject.CreateObjects(
base.TaggedObject.AllData,
base.TaggedObject.WorkloadOffset,
base.TaggedObject.WorkloadLength);
if (taggedObjects != null && taggedObjects.Length > 0)
{
var objects = new List<Asn1Object>();
foreach (var taggedObject in taggedObjects)
{
var asn1 = ObjectFactory.CreateAsn1Object(base.Document, taggedObject, this);
if (asn1 != null) objects.Add(asn1);
}
Nodes = objects.ToArray();
}
else Nodes = new Asn1Object[0];
}
private int GetImageIndex(Asn1Object asn)
{
// TODO: support icon sets by theme
if (asn == null) return emptyImageIndex;
if (asn is Asn1InvalidObject) return invalidImageIndex;
if (asn is Asn1Sequence) return sequenceImageIndex;
if (asn is Asn1Set) return setImageIndex;
if (asn is Asn1Oid) return oidImageIndex;
if (asn is Asn1Integer) return integerImageIndex;
if (asn is Asn1BitString) return stringImageIndex;
if (asn is Asn1Utf8String) return stringImageIndex;
if (asn is Asn1NumericString) return stringImageIndex;
if (asn is Asn1OctetString) return stringImageIndex;
if (asn is Asn1UtcTime) return stringImageIndex;
if (asn is Asn1Unsupported) return unknownImageIndex;
if (asn is Asn1ContextSpecific) return contextSpecificImageIndex;
if (asn is Asn1Boolean) return booleanImageIndex;
return emptyImageIndex;
}
private void AddAsnNode(Asn1Object asn, TreeNodeEx parent)
{
var nodeAsText = asn.ToString();
if ((asn is Asn1OctetString || asn is Asn1BitString) && nodeAsText.Length > 40)
nodeAsText = nodeAsText.Substring(0, 40) + "...";
var treeNode = new TreeNodeEx(nodeAsText);
var imageIndex = GetImageIndex(asn);
treeNode.SelectedImageIndex = imageIndex;
treeNode.ImageIndex = imageIndex;
var asnt = asn as Asn1StructuredObject;
if (asnt != null)
{
foreach (var asn2 in asnt.Nodes)
AddAsnNode(asn2, treeNode);
}
treeNode.Tag = asn;
parent.Nodes.Add(treeNode);
}
protected Asn1Document(
byte[] data, bool parseOctetStrings, bool showInvalidTaggedObjects, Asn1ObjectFactory objectFactory)
{
Data = data;
ParseOctetStrings = parseOctetStrings;
ShowInvalidTaggedObjects = showInvalidTaggedObjects;
ObjectFactory = objectFactory ?? new Asn1ObjectFactory();
var taggedObjects = CreateTaggedObjects(data);
if (taggedObjects != null && taggedObjects.Length > 0)
{
var objects = new List<Asn1Object>();
foreach (var taggedObject in taggedObjects)
{
var asn1 = ObjectFactory.CreateAsn1Object(this, taggedObject, null);
if (asn1 != null)
objects.Add(asn1);
}
Nodes = objects.ToArray();
}
else Nodes = new Asn1Object[0];
}
public Asn1Oid(Asn1Document document, TaggedObject content, Asn1Object parentObject)
: base(document, content, parentObject)
{
oid = OidUtils.Decode(content.Workload);
}
internal Asn1InvalidObject(
Asn1Document document, InvalidTaggedObject content, Asn1Object parentObject) :
base(document, content, parentObject)
{
InvalidTaggedObject = content;
}
public Asn1BitString(Asn1Document document, TaggedObject content, Asn1Object parentObject)
: base(document, content, parentObject)
{
unusedBytes = content.Workload[0];
bitString = content.Workload.Skip(1).ToArray();
}
internal Asn1ContextSpecific(Asn1Document document, TaggedObject content, Asn1Object parentObject)
: base(document, content, parentObject) { }
public Asn1BitString(Asn1Document document, TaggedObject content, Asn1Object parentObject)
: base(document, content, parentObject)
{
unusedBytes = content.Workload[0];
bitString = content.Workload.Skip(1).ToArray();
}
public Asn1StructuredObject(Asn1Document document, TaggedObject content, Asn1Object parentObject)
: base(document, content, parentObject)
{
ParseContent();
}
public Asn1Set(Asn1Document document, TaggedObject content, Asn1Object parentObject)
: base(document, content, parentObject)
{
}
public Asn1Boolean(Asn1Document document, TaggedObject content, Asn1Object parentObject)
: base(document, content, parentObject)
{
boolean = content.Workload[0] == 0xFF;
}
public Asn1Null(Asn1Document document, TaggedObject content, Asn1Object parentObject)
: base(document, content, parentObject)
{
warning = content.WorkloadLength != 0;
}
internal Asn1InvalidObject(
Asn1Document document, InvalidTaggedObject content, Asn1Object parentObject) :
base(document, content, parentObject)
{
InvalidTaggedObject = content;
}
public Asn1NumericString(Asn1Document document, TaggedObject content, Asn1Object parentObject)
: base(document, content, parentObject) { }
public Asn1Object CreateAsn1Object(Asn1Document document, TaggedObject content, Asn1Object parent)
{
return ObjectFactory.CreateAsn1Object(document, content, parent);
}
public Asn1PrintableString(Asn1Document document, TaggedObject content, Asn1Object parentObject)
: base(document, content, parentObject)
{
}
public Asn1Utf8String(Asn1Document document, TaggedObject content, Asn1Object parentObject)
: base(document, content, parentObject)
{
utf8 = Encoding.UTF8.GetString(content.Workload);
}
public Asn1DG1Data(Asn1Document document, TaggedObject content, Asn1Object parentObject)
: base(document, content, parentObject) { }
protected virtual Asn1Object CreateSpecificTaggedObject(Asn1Document document, TaggedObject content, Asn1Object parent)
{
return null;
}
public Asn1NumericString(Asn1Document document, TaggedObject content, Asn1Object parentObject)
: base(document, content, parentObject)
{
}
public Asn1PrintableString(Asn1Document document, TaggedObject content, Asn1Object parentObject)
: base(document, content, parentObject) { }
