/// <summary>
/// Retrieve the node description.
/// </summary>
/// <param name="pureHexMode">true:Return hex string only;
/// false:Convert to more readable string depending on the node tag.</param>
/// <returns>string</returns>
public string GetDataStr(bool pureHexMode)
{
const int lineLen = 32;
string dataStr = "";
if (pureHexMode)
{
dataStr = Asn1Util.FormatString(Asn1Util.ToHexString(data), lineLen, 2);
}
else
{
switch (tag)
{
case Asn1Tag.BIT_STRING:
dataStr = Asn1Util.FormatString(Asn1Util.ToHexString(data), lineLen, 2);
break;
case Asn1Tag.OBJECT_IDENTIFIER:
Oid xoid = new Oid();
dataStr = xoid.Decode(new MemoryStream(data));
break;
case Asn1Tag.RELATIVE_OID:
RelativeOid roid = new RelativeOid();
dataStr = roid.Decode(new MemoryStream(data));
break;
case Asn1Tag.PRINTABLE_STRING:
case Asn1Tag.IA5_STRING:
case Asn1Tag.UNIVERSAL_STRING:
case Asn1Tag.VISIBLE_STRING:
case Asn1Tag.NUMERIC_STRING:
case Asn1Tag.UTC_TIME:
case Asn1Tag.BMPSTRING:
case Asn1Tag.GENERAL_STRING:
case Asn1Tag.GENERALIZED_TIME:
dataStr = Asn1Util.BytesToString(data);
break;
case Asn1Tag.UTF8_STRING:
UTF8Encoding utf8 = new UTF8Encoding();
dataStr = utf8.GetString(data);
break;
case Asn1Tag.INTEGER:
dataStr = Asn1Util.FormatString(Asn1Util.ToHexString(data), lineLen, 2);
break;
default:
if ((tag & Asn1Tag.TAG_MASK) == 6) // Visible string for certificate
{
dataStr = Asn1Util.BytesToString(data);
}
else
{
dataStr = Asn1Util.FormatString(Asn1Util.ToHexString(data), lineLen, 2);
}
break;
};
}
return dataStr;
}
/// <summary>
/// Get node label string.
/// </summary>
/// <param name="mask">
/// <code>
/// SHOW_OFFSET
/// SHOW_DATA
/// USE_HEX_OFFSET
/// SHOW_TAG_NUMBER
/// SHOW_PATH</code>
/// </param>
/// <returns>string</returns>
public string GetLabel(uint mask)
{
string nodeStr = "";
string dataStr = "";
string offsetStr = "";
if ((mask & TagTextMask.USE_HEX_OFFSET) != 0)
{
if ((mask & TagTextMask.SHOW_TAG_NUMBER) != 0)
offsetStr = String.Format("(0x{0:X2},0x{1:X6},0x{2:X4})", tag, dataOffset, dataLength);
else
offsetStr = String.Format("(0x{0:X6},0x{1:X4})", dataOffset, dataLength);
}
else
{
if ((mask & TagTextMask.SHOW_TAG_NUMBER) != 0)
offsetStr = String.Format("({0},{1},{2})", tag, dataOffset, dataLength);
else
offsetStr = String.Format("({0},{1})", dataOffset, dataLength);
}
string oid, oidName;
switch (tag)
{
case Asn1Tag.BIT_STRING:
if ((mask & TagTextMask.SHOW_OFFSET) != 0)
{
nodeStr += offsetStr;
}
nodeStr += " " + TagName + " UnusedBits: " + unusedBits.ToString();
if ((mask & TagTextMask.SHOW_DATA) != 0)
{
dataStr = Asn1Util.ToHexString(data);
nodeStr += ((dataStr.Length>0) ? " : '" + dataStr + "'" : "");
}
break;
case Asn1Tag.OBJECT_IDENTIFIER:
Oid xoid = new Oid();
oid = xoid.Decode(data);
oidName = xoid.GetOidName(oid);
if ((mask & TagTextMask.SHOW_OFFSET) != 0)
{
nodeStr += offsetStr;
}
nodeStr += " " + TagName;
nodeStr += " : " + oidName;
if ((mask & TagTextMask.SHOW_DATA) != 0)
{
nodeStr += ((oid.Length>0) ? " : '" + oid + "'" : "");
}
break;
case Asn1Tag.RELATIVE_OID:
RelativeOid roid = new RelativeOid();
oid = roid.Decode(data);
oidName = "";
if ((mask & TagTextMask.SHOW_OFFSET) != 0)
{
nodeStr += offsetStr;
}
nodeStr += " " + TagName;
nodeStr += " : " + oidName;
if ((mask & TagTextMask.SHOW_DATA) != 0)
{
nodeStr += ((oid.Length>0) ? " : '" + oid + "'" : "");
}
break;
case Asn1Tag.PRINTABLE_STRING:
case Asn1Tag.IA5_STRING:
case Asn1Tag.UNIVERSAL_STRING:
case Asn1Tag.VISIBLE_STRING:
case Asn1Tag.NUMERIC_STRING:
case Asn1Tag.UTC_TIME:
case Asn1Tag.UTF8_STRING:
case Asn1Tag.BMPSTRING:
case Asn1Tag.GENERAL_STRING:
case Asn1Tag.GENERALIZED_TIME:
if ((mask & TagTextMask.SHOW_OFFSET) != 0)
{
nodeStr += offsetStr;
}
nodeStr += " " + TagName;
if ((mask & TagTextMask.SHOW_DATA) != 0)
{
if ( tag == Asn1Tag.UTF8_STRING )
{
UTF8Encoding unicode = new UTF8Encoding();
dataStr = unicode.GetString(data);
}
else
{
dataStr = Asn1Util.BytesToString(data);
}
nodeStr += ((dataStr.Length>0) ? " : '" + dataStr + "'" : "");
}
break;
case Asn1Tag.INTEGER:
if ((mask & TagTextMask.SHOW_OFFSET) != 0)
{
nodeStr += offsetStr;
}
nodeStr += " " + TagName;
if ((mask & TagTextMask.SHOW_DATA) != 0)
{
if (data != null && dataLength < 8)
{
dataStr = Asn1Util.BytesToLong(data).ToString();
}
else
{
dataStr = Asn1Util.ToHexString(data);
}
nodeStr += ((dataStr.Length>0) ? " : '" + dataStr + "'" : "");
}
break;
default:
if ((mask & TagTextMask.SHOW_OFFSET) != 0)
{
nodeStr += offsetStr;
}
nodeStr += " " + TagName;
if ((mask & TagTextMask.SHOW_DATA) != 0)
{
if ((tag & Asn1Tag.TAG_MASK) == 6) // Visible string for certificate
{
dataStr = Asn1Util.BytesToString(data);
}
else
{
dataStr = Asn1Util.ToHexString(data);
}
nodeStr += ((dataStr.Length>0) ? " : '" + dataStr + "'" : "");
}
break;
};
if ((mask & TagTextMask.SHOW_PATH) != 0)
{
nodeStr = "(" + path + ") " + nodeStr;
}
return nodeStr;
}
/// <summary>
/// Get the node and all the descendents text description.
/// </summary>
/// <param name="startNode">starting node.</param>
/// <param name="lineLen">line length.</param>
/// <returns></returns>
public string GetText(Asn1Node startNode, int lineLen)
{
string nodeStr = "";
string baseLine = "";
string dataStr = "";
const string lStr = " | | | ";
string oid, oidName;
switch (tag)
{
case Asn1Tag.BIT_STRING:
baseLine =
String.Format("{0,6}|{1,6}|{2,7}|{3} {4} UnusedBits:{5} : ",
dataOffset,
dataLength,
lengthFieldBytes,
GetIndentStr(startNode),
TagName,
unusedBits
);
dataStr = Asn1Util.ToHexString(data);
if (baseLine.Length + dataStr.Length < lineLen)
{
if (dataStr.Length<1)
{
nodeStr += baseLine + "\r\n";
}
else
{
nodeStr += baseLine + "'" + dataStr + "'\r\n";
}
}
else
{
nodeStr += baseLine + FormatLineHexString(
lStr,
GetIndentStr(startNode).Length,
lineLen,
dataStr + "\r\n"
);
}
break;
case Asn1Tag.OBJECT_IDENTIFIER:
Oid xoid = new Oid();
oid = xoid.Decode(new MemoryStream(data));
oidName = xoid.GetOidName(oid);
nodeStr += String.Format("{0,6}|{1,6}|{2,7}|{3} {4} : {5} [{6}]\r\n",
dataOffset,
dataLength,
lengthFieldBytes,
GetIndentStr(startNode),
TagName,
oidName,
oid
);
break;
case Asn1Tag.RELATIVE_OID:
RelativeOid xiod = new RelativeOid();
oid = xiod.Decode(new MemoryStream(data));
oidName = "";
nodeStr += String.Format("{0,6}|{1,6}|{2,7}|{3} {4} : {5} [{6}]\r\n",
dataOffset,
dataLength,
lengthFieldBytes,
GetIndentStr(startNode),
TagName,
oidName,
oid
);
break;
case Asn1Tag.PRINTABLE_STRING:
case Asn1Tag.IA5_STRING:
case Asn1Tag.UNIVERSAL_STRING:
case Asn1Tag.VISIBLE_STRING:
case Asn1Tag.NUMERIC_STRING:
case Asn1Tag.UTC_TIME:
case Asn1Tag.UTF8_STRING:
case Asn1Tag.BMPSTRING:
case Asn1Tag.GENERAL_STRING:
case Asn1Tag.GENERALIZED_TIME:
baseLine =
String.Format("{0,6}|{1,6}|{2,7}|{3} {4} : ",
dataOffset,
dataLength,
lengthFieldBytes,
GetIndentStr(startNode),
TagName
);
if ( tag == Asn1Tag.UTF8_STRING )
{
UTF8Encoding unicode = new UTF8Encoding();
dataStr = unicode.GetString(data);
}
else
{
dataStr = Asn1Util.BytesToString(data);
}
if (baseLine.Length + dataStr.Length < lineLen)
{
nodeStr += baseLine + "'" + dataStr + "'\r\n";
}
else
{
nodeStr += baseLine + FormatLineString(
lStr,
GetIndentStr(startNode).Length,
lineLen,
dataStr) + "\r\n";
}
break;
case Asn1Tag.INTEGER:
if (data != null && dataLength < 8)
{
nodeStr += String.Format("{0,6}|{1,6}|{2,7}|{3} {4} : {5}\r\n",
dataOffset,
dataLength,
lengthFieldBytes,
GetIndentStr(startNode),
TagName,
Asn1Util.BytesToLong(data).ToString()
);
}
else
{
baseLine =
String.Format("{0,6}|{1,6}|{2,7}|{3} {4} : ",
dataOffset,
dataLength,
lengthFieldBytes,
GetIndentStr(startNode),
TagName
);
nodeStr += GetHexPrintingStr(startNode, baseLine, lStr, lineLen);
}
break;
default:
if ((tag & Asn1Tag.TAG_MASK) == 6) // Visible string for certificate
{
baseLine =
String.Format("{0,6}|{1,6}|{2,7}|{3} {4} : ",
dataOffset,
dataLength,
lengthFieldBytes,
GetIndentStr(startNode),
TagName
);
dataStr = Asn1Util.BytesToString(data);
if (baseLine.Length + dataStr.Length < lineLen)
{
nodeStr += baseLine + "'" + dataStr + "'\r\n";
}
else
{
nodeStr += baseLine + FormatLineString(
lStr,
GetIndentStr(startNode).Length,
lineLen,
dataStr) + "\r\n";
}
}
else
{
baseLine =
String.Format("{0,6}|{1,6}|{2,7}|{3} {4} : ",
dataOffset,
dataLength,
lengthFieldBytes,
GetIndentStr(startNode),
TagName
);
nodeStr += GetHexPrintingStr(startNode, baseLine, lStr, lineLen);
}
break;
};
if (childNodeList.Count >= 0)
{
nodeStr += GetListStr(startNode, lineLen);
}
return nodeStr;
}