// Jesper Pedersen <jep@itplus.dk>
//
// (C) 2002, 2003 Motus Technologies Inc. (http://www.motus.com)
-// (C) 2004 Novell (http://www.novell.com)
+// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
// (C) 2004 IT+ A/S (http://www.itplus.dk)
//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
using System;
using System.Collections;
#endif
class ASN1 {
- protected byte m_nTag;
- protected byte[] m_aValue;
- protected ArrayList elist;
+ private byte m_nTag;
+ private byte[] m_aValue;
+ private ArrayList elist;
public ASN1 () : this (0x00, null) {}
nLength += data [i + 2];
}
}
+ else if (nLength == 0x80) {
+ // undefined length encoding
+ throw new NotSupportedException ("Undefined length encoding.");
+ }
m_aValue = new byte [nLength];
- Array.Copy (data, (2 + nLenLength), m_aValue, 0, nLength);
+ Buffer.BlockCopy (data, (2 + nLenLength), m_aValue, 0, nLength);
if ((m_nTag & 0x20) == 0x20) {
int nStart = (2 + nLenLength);
return CompareArray (this.GetBytes (), asn1);
}
- public bool CompareValue (byte[] aValue)
+ public bool CompareValue (byte[] value)
{
- return CompareArray (m_aValue, aValue);
+ return CompareArray (m_aValue, value);
}
- public virtual ASN1 Add (ASN1 asn1)
+ public ASN1 Add (ASN1 asn1)
{
if (asn1 != null) {
if (elist == null)
int pos = 0;
for (int i=0; i < elist.Count; i++) {
byte[] item = (byte[]) al[i];
- Array.Copy (item, 0, val, pos, item.Length);
+ Buffer.BlockCopy (item, 0, val, pos, item.Length);
pos += item.Length;
}
}
int nLength = val.Length;
// special for length > 127
if (nLength > 127) {
- if (nLength < 256) {
+ if (nLength <= Byte.MaxValue) {
der = new byte [3 + nLength];
- Array.Copy (val, 0, der, 3, nLength);
- nLengthLen += 0x81;
+ Buffer.BlockCopy (val, 0, der, 3, nLength);
+ nLengthLen = 0x81;
der[2] = (byte)(nLength);
}
- else {
+ else if (nLength <= UInt16.MaxValue) {
der = new byte [4 + nLength];
- Array.Copy (val, 0, der, 4, nLength);
- nLengthLen += 0x82;
- der[2] = (byte)(nLength / 256);
- der[3] = (byte)(nLength % 256);
+ Buffer.BlockCopy (val, 0, der, 4, nLength);
+ nLengthLen = 0x82;
+ der[2] = (byte)(nLength >> 8);
+ der[3] = (byte)(nLength);
+ }
+ else if (nLength <= 0xFFFFFF) {
+ // 24 bits
+ der = new byte [5 + nLength];
+ Buffer.BlockCopy (val, 0, der, 5, nLength);
+ nLengthLen = 0x83;
+ der [2] = (byte)(nLength >> 16);
+ der [3] = (byte)(nLength >> 8);
+ der [4] = (byte)(nLength);
+ }
+ else {
+ // max (Length is an integer) 32 bits
+ der = new byte [6 + nLength];
+ Buffer.BlockCopy (val, 0, der, 6, nLength);
+ nLengthLen = 0x84;
+ der [2] = (byte)(nLength >> 24);
+ der [3] = (byte)(nLength >> 16);
+ der [4] = (byte)(nLength >> 8);
+ der [5] = (byte)(nLength);
}
}
else {
+ // basic case (no encoding)
der = new byte [2 + nLength];
- Array.Copy (val, 0, der, 2, nLength);
+ Buffer.BlockCopy (val, 0, der, 2, nLength);
nLengthLen = nLength;
}
if (m_aValue == null)
}
// TLV : Tag - Length - Value
- protected void DecodeTLV (byte[] asn1, ref int anPos, out byte anTag, out int anLength, out byte[] aValue)
+ protected void DecodeTLV (byte[] asn1, ref int pos, out byte tag, out int length, out byte[] content)
{
- anTag = asn1 [anPos++];
- anLength = asn1 [anPos++];
+ tag = asn1 [pos++];
+ length = asn1 [pos++];
// special case where L contains the Length of the Length + 0x80
- if ((anLength & 0x80) == 0x80) {
- int nLengthLen = anLength & 0x7F;
- anLength = 0;
+ if ((length & 0x80) == 0x80) {
+ int nLengthLen = length & 0x7F;
+ length = 0;
for (int i = 0; i < nLengthLen; i++)
- anLength = anLength * 256 + asn1 [anPos++];
+ length = length * 256 + asn1 [pos++];
}
- aValue = new byte [anLength];
- Array.Copy (asn1, anPos, aValue, 0, anLength);
+ content = new byte [length];
+ Buffer.BlockCopy (asn1, pos, content, 0, length);
}
public ASN1 this [int index] {
get {
try {
- if (index >= elist.Count)
+ if ((elist == null) || (index >= elist.Count))
return null;
return (ASN1) elist [index];
}
- catch {
+ catch (ArgumentOutOfRangeException) {
return null;
}
}
public ASN1 Element (int index, byte anTag)
{
try {
- if (index >= elist.Count)
+ if ((elist == null) || (index >= elist.Count))
return null;
ASN1 elm = (ASN1) elist [index];
else
return null;
}
- catch {
+ catch (ArgumentOutOfRangeException) {
return null;
}
}
public override string ToString()
{
- string lineSeperator = Environment.NewLine;
-
StringBuilder hexLine = new StringBuilder ();
// Add tag
- hexLine.Append ("Tag: ");
- hexLine.Append (System.Convert.ToString (Tag, 16));
- hexLine.Append (lineSeperator);
+ hexLine.AppendFormat ("Tag: {0} {1}", m_nTag.ToString ("X2"), Environment.NewLine);
+
+ // Add length
+ hexLine.AppendFormat ("Length: {0} {1}", Value.Length, Environment.NewLine);
// Add value
hexLine.Append ("Value: ");
- hexLine.Append (lineSeperator);
+ hexLine.Append (Environment.NewLine);
for (int i = 0; i < Value.Length; i++) {
- if (Value[i] < 16) {
- hexLine.Append ("0");
- }
- hexLine.Append (System.Convert.ToString (Value [i], 16));
- hexLine.Append (" ");
- if ((i+1) % 16 == 0) {
- hexLine.Append (lineSeperator);
- }
+ hexLine.AppendFormat ("{0} ", Value [i].ToString ("X2"));
+ if ((i+1) % 16 == 0)
+ hexLine.AppendFormat (Environment.NewLine);
}
return hexLine.ToString ();
}
projects / mono.git / blobdiff