aboutsummaryrefslogtreecommitdiff
path: root/Emby.Server.Implementations/Cryptography/ASN1.cs
diff options
context:
space:
mode:
Diffstat (limited to 'Emby.Server.Implementations/Cryptography/ASN1.cs')
-rw-r--r--Emby.Server.Implementations/Cryptography/ASN1.cs340
1 files changed, 0 insertions, 340 deletions
diff --git a/Emby.Server.Implementations/Cryptography/ASN1.cs b/Emby.Server.Implementations/Cryptography/ASN1.cs
deleted file mode 100644
index f5c826436..000000000
--- a/Emby.Server.Implementations/Cryptography/ASN1.cs
+++ /dev/null
@@ -1,340 +0,0 @@
-//
-// ASN1.cs: Abstract Syntax Notation 1 - micro-parser and generator
-//
-// Authors:
-// Sebastien Pouliot <sebastien@ximian.com>
-// Jesper Pedersen <jep@itplus.dk>
-//
-// (C) 2002, 2003 Motus Technologies Inc. (http://www.motus.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;
-using System.IO;
-using System.Text;
-
-namespace Emby.Server.Core.Cryptography
-{
-
- // References:
- // a. ITU ASN.1 standards (free download)
- // http://www.itu.int/ITU-T/studygroups/com17/languages/
-
- public class ASN1 {
-
- private byte m_nTag;
- private byte[] m_aValue;
- private ArrayList elist;
-
- public ASN1 () : this (0x00, null) {}
-
- public ASN1 (byte tag) : this (tag, null) {}
-
- public ASN1 (byte tag, byte[] data)
- {
- m_nTag = tag;
- m_aValue = data;
- }
-
- public ASN1 (byte[] data)
- {
- m_nTag = data [0];
-
- int nLenLength = 0;
- int nLength = data [1];
-
- if (nLength > 0x80) {
- // composed length
- nLenLength = nLength - 0x80;
- nLength = 0;
- for (int i = 0; i < nLenLength; i++) {
- nLength *= 256;
- nLength += data [i + 2];
- }
- }
- else if (nLength == 0x80) {
- // undefined length encoding
- throw new NotSupportedException ("Undefined length encoding.");
- }
-
- m_aValue = new byte [nLength];
- Buffer.BlockCopy (data, (2 + nLenLength), m_aValue, 0, nLength);
-
- if ((m_nTag & 0x20) == 0x20) {
- int nStart = (2 + nLenLength);
- Decode (data, ref nStart, data.Length);
- }
- }
-
- public int Count {
- get {
- if (elist == null)
- return 0;
- return elist.Count;
- }
- }
-
- public byte Tag {
- get { return m_nTag; }
- }
-
- public int Length {
- get {
- if (m_aValue != null)
- return m_aValue.Length;
- else
- return 0;
- }
- }
-
- public byte[] Value {
- get {
- if (m_aValue == null)
- GetBytes ();
- return (byte[]) m_aValue.Clone ();
- }
- set {
- if (value != null)
- m_aValue = (byte[]) value.Clone ();
- }
- }
-
- private bool CompareArray (byte[] array1, byte[] array2)
- {
- bool bResult = (array1.Length == array2.Length);
- if (bResult) {
- for (int i = 0; i < array1.Length; i++) {
- if (array1[i] != array2[i])
- return false;
- }
- }
- return bResult;
- }
-
- public bool Equals (byte[] asn1)
- {
- return CompareArray (this.GetBytes (), asn1);
- }
-
- public bool CompareValue (byte[] value)
- {
- return CompareArray (m_aValue, value);
- }
-
- public ASN1 Add (ASN1 asn1)
- {
- if (asn1 != null) {
- if (elist == null)
- elist = new ArrayList ();
- elist.Add (asn1);
- }
- return asn1;
- }
-
- public virtual byte[] GetBytes ()
- {
- byte[] val = null;
-
- if (Count > 0) {
- int esize = 0;
- ArrayList al = new ArrayList ();
- foreach (ASN1 a in elist) {
- byte[] item = a.GetBytes ();
- al.Add (item);
- esize += item.Length;
- }
- val = new byte [esize];
- int pos = 0;
- for (int i=0; i < elist.Count; i++) {
- byte[] item = (byte[]) al[i];
- Buffer.BlockCopy (item, 0, val, pos, item.Length);
- pos += item.Length;
- }
- } else if (m_aValue != null) {
- val = m_aValue;
- }
-
- byte[] der;
- int nLengthLen = 0;
-
- if (val != null) {
- int nLength = val.Length;
- // special for length > 127
- if (nLength > 127) {
- if (nLength <= Byte.MaxValue) {
- der = new byte [3 + nLength];
- Buffer.BlockCopy (val, 0, der, 3, nLength);
- nLengthLen = 0x81;
- der[2] = (byte)(nLength);
- }
- else if (nLength <= UInt16.MaxValue) {
- der = new byte [4 + nLength];
- 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];
- Buffer.BlockCopy (val, 0, der, 2, nLength);
- nLengthLen = nLength;
- }
- if (m_aValue == null)
- m_aValue = val;
- }
- else
- der = new byte[2];
-
- der[0] = m_nTag;
- der[1] = (byte)nLengthLen;
-
- return der;
- }
-
- // Note: Recursive
- protected void Decode (byte[] asn1, ref int anPos, int anLength)
- {
- byte nTag;
- int nLength;
- byte[] aValue;
-
- // minimum is 2 bytes (tag + length of 0)
- while (anPos < anLength - 1) {
- DecodeTLV (asn1, ref anPos, out nTag, out nLength, out aValue);
- // sometimes we get trailing 0
- if (nTag == 0)
- continue;
-
- ASN1 elm = Add (new ASN1 (nTag, aValue));
-
- if ((nTag & 0x20) == 0x20) {
- int nConstructedPos = anPos;
- elm.Decode (asn1, ref nConstructedPos, nConstructedPos + nLength);
- }
- anPos += nLength; // value length
- }
- }
-
- // TLV : Tag - Length - Value
- protected void DecodeTLV (byte[] asn1, ref int pos, out byte tag, out int length, out byte[] content)
- {
- tag = asn1 [pos++];
- length = asn1 [pos++];
-
- // special case where L contains the Length of the Length + 0x80
- if ((length & 0x80) == 0x80) {
- int nLengthLen = length & 0x7F;
- length = 0;
- for (int i = 0; i < nLengthLen; i++)
- length = length * 256 + asn1 [pos++];
- }
-
- content = new byte [length];
- Buffer.BlockCopy (asn1, pos, content, 0, length);
- }
-
- public ASN1 this [int index] {
- get {
- try {
- if ((elist == null) || (index >= elist.Count))
- return null;
- return (ASN1) elist [index];
- }
- catch (ArgumentOutOfRangeException) {
- return null;
- }
- }
- }
-
- public ASN1 Element (int index, byte anTag)
- {
- try {
- if ((elist == null) || (index >= elist.Count))
- return null;
-
- ASN1 elm = (ASN1) elist [index];
- if (elm.Tag == anTag)
- return elm;
- else
- return null;
- }
- catch (ArgumentOutOfRangeException) {
- return null;
- }
- }
-
- public override string ToString()
- {
- StringBuilder hexLine = new StringBuilder ();
-
- // Add tag
- 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 (Environment.NewLine);
- for (int i = 0; i < Value.Length; i++) {
- hexLine.AppendFormat ("{0} ", Value [i].ToString ("X2"));
- if ((i+1) % 16 == 0)
- hexLine.AppendFormat (Environment.NewLine);
- }
- return hexLine.ToString ();
- }
-
- public void SaveToFile (string filename)
- {
- if (filename == null)
- throw new ArgumentNullException ("filename");
-
- using (FileStream fs = File.Create (filename)) {
- byte[] data = GetBytes ();
- fs.Write (data, 0, data.Length);
- }
- }
- }
-}
generated by cgit v1.2.3 (git 2.46.0) at 2025-12-06 19:33:35 +0000