/// <summary>
/// Convert XML to ASN.1 PDU bytes.
/// </summary>
/// <param name="xml">XML. </param>
/// <returns>ASN.1 PDU. </returns>
public static byte[] XmlToPdu(string xml)
{
XmlDocument doc = new XmlDocument();
doc.LoadXml(xml);
IList <object> list = new List <object>();
GXAsn1Settings s = new GXAsn1Settings();
ReadNode(doc.DocumentElement, s, list);
return(ToByteArray(list[0]));
}
/// <summary>
/// Convert ASN.1 PDU bytes to XML.
/// </summary>
/// <param name="value">Bytes to convert. </param>
/// <param name="comments">Are comments added to generated XML. </param>
/// <returns>Converted XML. </returns>
public static string PduToXml(GXByteBuffer value, bool comments)
{
GXAsn1Settings s = new GXAsn1Settings();
s.Comments = comments;
IList <object> objects = new List <object>();
while (value.Position != value.Size)
{
GetValue(value, objects, s);
}
return(s.ToString());
}
private static int ReadNode(XmlElement node, GXAsn1Settings s, IList <object> list)
{
IList <object> tmp;
string str = node.Name.ToLower();
int tag = s.GetTag(str);
switch (tag)
{
case (byte)BerType.Application:
tmp = new List <object>();
foreach (XmlElement node2 in node.ChildNodes)
{
if (node2.NodeType == XmlNodeType.Element)
{
ReadNode(node2, s, tmp);
}
}
list.Add(tmp);
break;
case (byte)(BerType.Constructed | BerType.Context):
tmp = new GXAsn1Context();
foreach (XmlElement node2 in node.ChildNodes)
{
if (node2.NodeType == XmlNodeType.Element)
{
ReadNode(node2, s, tmp);
}
}
list.Add(tmp);
break;
case (byte)(BerType.Constructed | BerType.Sequence):
tmp = new GXAsn1Sequence();
foreach (XmlElement node2 in node.ChildNodes)
{
if (node2.NodeType == XmlNodeType.Element)
{
ReadNode(node2, s, tmp);
}
}
list.Add(tmp);
break;
case (byte)(BerType.Constructed | BerType.Set):
tmp = new List <object>();
foreach (XmlElement node2 in node.ChildNodes)
{
if (node2.NodeType == XmlNodeType.Element)
{
ReadNode(node2, s, tmp);
}
}
foreach (object val in tmp)
{
KeyValuePair <object, object> e;
if (val is IList)
{
IList t = (IList)val;
e = new KeyValuePair <object, object>(t[0], t[1]);
}
else
{
e = new KeyValuePair <object, object>(tmp, null);
}
list.Add(e);
}
break;
case (byte)BerType.ObjectIdentifier:
list.Add(new GXAsn1ObjectIdentifier(node.ChildNodes[0].Value));
break;
case (byte)BerType.PrintableString:
list.Add(node.ChildNodes[0].Value);
break;
case (byte)BerType.Utf8StringTag:
list.Add(new GXAsn1Utf8String(node.ChildNodes[0].Value));
break;
case (byte)BerType.Ia5String:
list.Add(new GXAsn1Ia5String(node.ChildNodes[0].Value));
break;
case (byte)BerType.Integer:
list.Add(new GXAsn1Integer(node.ChildNodes[0].Value));
break;
case (byte)BerType.Null:
list.Add(null);
break;
case (byte)BerType.BitString:
list.Add(new GXAsn1BitString(node.ChildNodes[0].Value));
break;
case (byte)BerType.UtcTime:
DateTime d = DateTime.ParseExact(node.ChildNodes[0].Value, "yyyy-MM-dd HH:mm", CultureInfo.InvariantCulture);
list.Add(d);
break;
case (byte)BerType.GeneralizedTime:
break;
case (byte)BerType.OctetString:
break;
case -1:
list.Add(Convert.ToSByte(node.ChildNodes[0].Value));
break;
case -2:
list.Add(Convert.ToInt16(node.ChildNodes[0].Value));
break;
case -4:
list.Add(Convert.ToInt32(node.ChildNodes[0].Value));
break;
case -8:
list.Add(Convert.ToInt64(node.ChildNodes[0].Value));
break;
default:
throw new System.ArgumentException("Invalid node: " + node.Name);
}
return(0);
}
private static void GetValue(GXByteBuffer bb, IList <object> objects, GXAsn1Settings s)
{
int len;
short type;
IList <object> tmp;
byte[] tmp2;
type = bb.GetUInt8();
len = GXCommon.GetObjectCount(bb);
if (len > bb.Available)
{
throw new OutOfMemoryException("GXAsn1Converter.GetValue");
}
int connectPos = 0;
if (s != null)
{
connectPos = s.XmlLength;
}
int start = bb.Position;
string tagString = null;
if (s != null)
{
s.AppendSpaces();
if (type == (byte)BerType.Integer)
{
if (len == 1 || len == 2 || len == 4 || len == 8)
{
tagString = s.GetTag((short)-len);
}
else
{
tagString = s.GetTag((byte)BerType.Integer);
}
}
else
{
tagString = s.GetTag(type);
}
s.Append("<" + tagString + ">");
}
switch (type)
{
case (byte)(BerType.Constructed | BerType.Context):
case ((byte)(BerType.Constructed | BerType.Context) | 1):
case ((byte)(BerType.Constructed | BerType.Context) | 2):
case ((byte)(BerType.Constructed | BerType.Context) | 3):
case ((byte)(BerType.Constructed | BerType.Context) | 4):
if (s != null)
{
s.Increase();
}
tmp = new GXAsn1Context()
{
Index = type & 0xF
};
objects.Add(tmp);
while (bb.Position < start + len)
{
GetValue(bb, tmp, s);
}
if (s != null)
{
s.Decrease();
}
break;
case (byte)(BerType.Constructed | BerType.Sequence):
if (s != null)
{
s.Increase();
}
tmp = new GXAsn1Sequence();
objects.Add(tmp);
int cnt = 0;
while (bb.Position < start + len)
{
++cnt;
GetValue(bb, tmp, s);
}
if (s != null)
{
// Append comment.
s.AppendComment(connectPos, Convert.ToString(cnt) + " elements.");
s.Decrease();
}
break;
case (byte)(BerType.Constructed | BerType.Set):
if (s != null)
{
s.Increase();
}
tmp = new List <object>();
GetValue(bb, tmp, s);
if (tmp[0] is GXAsn1Sequence)
{
tmp = (GXAsn1Sequence)tmp[0];
objects.Add(new KeyValuePair <object, object>(tmp[0], tmp[1]));
}
else
{
KeyValuePair <object, object> e = new KeyValuePair <object, object>(tmp, null);
objects.Add(e);
}
if (s != null)
{
s.Decrease();
}
break;
case (byte)BerType.ObjectIdentifier:
GXAsn1ObjectIdentifier oi = new GXAsn1ObjectIdentifier(bb, len);
objects.Add(oi);
if (s != null)
{
string str = oi.Description;
if (str != null)
{
s.AppendComment(connectPos, str);
}
s.Append(oi.ToString());
}
break;
case (byte)BerType.PrintableString:
objects.Add(bb.GetString(len));
if (s != null)
{
s.Append(Convert.ToString(objects[objects.Count - 1]));
}
break;
case (byte)BerType.Utf8StringTag:
objects.Add(new GXAsn1Utf8String(bb.GetString(bb.Position, len)));
bb.Position = bb.Position + len;
if (s != null)
{
s.Append(Convert.ToString(objects[objects.Count - 1]));
}
break;
case (byte)BerType.Ia5String:
objects.Add(new GXAsn1Ia5String(bb.GetString(len)));
if (s != null)
{
s.Append(Convert.ToString(objects[objects.Count - 1]));
}
break;
case (byte)BerType.Integer:
if (len == 1)
{
objects.Add(bb.GetInt8());
}
else if (len == 2)
{
objects.Add(bb.GetInt16());
}
else if (len == 4)
{
objects.Add(bb.GetInt32());
}
else
{
tmp2 = new byte[len];
bb.Get(tmp2);
objects.Add(new GXAsn1Integer(tmp2));
}
if (s != null)
{
s.Append(Convert.ToString(objects[objects.Count - 1]));
}
break;
case (byte)BerType.Null:
objects.Add(null);
break;
case (byte)BerType.BitString:
GXAsn1BitString tmp3 = new GXAsn1BitString(bb.SubArray(bb.Position, len));
objects.Add(tmp3);
bb.Position = bb.Position + len;
if (s != null)
{
// Append comment.
s.AppendComment(connectPos, Convert.ToString(tmp3.Length) + " bit.");
s.Append(tmp3.asString());
}
break;
case (byte)BerType.UtcTime:
tmp2 = new byte[len];
bb.Get(tmp2);
objects.Add(GetUtcTime(ASCIIEncoding.ASCII.GetString(tmp2)));
if (s != null)
{
s.Append(((DateTimeOffset)objects[objects.Count - 1]).UtcDateTime.ToString("yyyy-MM-dd HH:mm", CultureInfo.InvariantCulture));
}
break;
case (byte)BerType.GeneralizedTime:
tmp2 = new byte[len];
bb.Get(tmp2);
objects.Add(GXCommon.GetGeneralizedTime(ASCIIEncoding.ASCII.GetString(tmp2)));
if (s != null)
{
s.Append(Convert.ToString(objects[objects.Count - 1]));
}
break;
case (byte)BerType.Context:
case (byte)BerType.Context | 1:
case (byte)BerType.Context | 2:
case (byte)BerType.Context | 3:
tmp = new GXAsn1Context()
{
Constructed = false, Index = type & 0xF
};
tmp2 = new byte[len];
bb.Get(tmp2);
tmp.Add(tmp2);
objects.Add(tmp);
if (s != null)
{
s.Append(GXCommon.ToHex(tmp2, false));
}
break;
case (byte)BerType.OctetString:
int t = bb.GetUInt8(bb.Position);
switch (t)
{
case (byte)(BerType.Constructed | BerType.Sequence):
case (byte)BerType.BitString:
if (s != null)
{
s.Increase();
}
GetValue(bb, objects, s);
if (s != null)
{
s.Decrease();
}
break;
default:
tmp2 = new byte[len];
bb.Get(tmp2);
objects.Add(tmp2);
if (s != null)
{
s.Append(GXCommon.ToHex(tmp2, false));
}
break;
}
break;
case (byte)BerType.Boolean:
bool b = bb.GetUInt8() != 0;
objects.Add(b);
if (s != null)
{
s.Append(Convert.ToString(b));
}
break;
default:
throw new System.ArgumentException("Invalid type: " + type);
}
if (s != null)
{
s.Append("</" + tagString + ">\r\n");
}
}
