migration from svn

6 years ago · c7796444a0
3 changed files with 255 additions and 0 deletions
--- a/Parser.csproj
+++ b/Parser.csproj
@ -0,0 +1,46 @@
+<Project ToolsVersion="3.5" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{5BE0072A-D18A-4B04-8BAD-3A4E3989924C}</ProjectGuid>
+    <ProductVersion>9.0.21022</ProductVersion>
+    <SchemaVersion>2.0</SchemaVersion>
+    <OutputType>Exe</OutputType>
+    <NoStandardLibraries>false</NoStandardLibraries>
+    <AssemblyName>ASN.1 Parser</AssemblyName>
+    <TargetFrameworkVersion>v2.0</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <RootNamespace>ASN._1_Parser</RootNamespace>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <DocumentationFile>bin\Debug\ASN.1 Parser.XML</DocumentationFile>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <DocumentationFile>bin\Release\ASN.1 Parser.XML</DocumentationFile>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="PoorManAsn1Parser.cs" />
+  </ItemGroup>
+  <Import Project="$(MSBuildBinPath)\Microsoft.CSHARP.Targets" />
+  <ProjectExtensions>
+    <VisualStudio AllowExistingFolder="true" />
+  </ProjectExtensions>
+</Project>
--- a/Parser.sln
+++ b/Parser.sln
@ -0,0 +1,20 @@
+
+Microsoft Visual Studio Solution File, Format Version 10.00
+# Visual Studio 2008
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ASN.1 Parser", "ASN.1 Parser.csproj", "{5BE0072A-D18A-4B04-8BAD-3A4E3989924C}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{5BE0072A-D18A-4B04-8BAD-3A4E3989924C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{5BE0072A-D18A-4B04-8BAD-3A4E3989924C}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{5BE0072A-D18A-4B04-8BAD-3A4E3989924C}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{5BE0072A-D18A-4B04-8BAD-3A4E3989924C}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal
--- a/PoorManAsn1Parser.cs
+++ b/PoorManAsn1Parser.cs
@ -0,0 +1,189 @@
+using System;
+using System.Collections;
+using System.IO;
+using System.Text;
+
+public class PoorManAsn1ParserTest
+{
+	static public void Main(String[] args) 
+	{
+		if (args.Length != 1) {
+			Console.WriteLine("Usage: PoorManAsn1ParserTest.exe <file>");
+			return;
+		}
+
+        try
+        {
+            FileStream f = File.Open(args[0], FileMode.Open);
+            int length = Convert.ToInt32(f.Length);
+            byte[] rawasn1 = new byte[length];
+            f.Read(rawasn1, 0, length);
+
+            PoorManAsn1Parser parser = new PoorManAsn1Parser();
+            Object obj = parser.Parse(rawasn1, 0);
+            Dump(obj, "");
+        }
+        catch (Exception e)
+        {
+            Console.WriteLine(e.Message);
+            Console.WriteLine(e.StackTrace);
+        }
+	}
+
+	static private void Dump(Object o, String indent) {
+        if (o == null)
+        {
+            Console.WriteLine("{0}null", indent);
+        } 
+        else if (o is String)
+        {
+			Console.WriteLine("{0}{1}", indent, o as String);
+		}
+        else if (o is byte[])
+        {
+            StringBuilder sb = new StringBuilder(indent);
+            sb.Append("[");
+            foreach (byte b in (o as byte[]))
+            {
+                sb.AppendFormat("{0:x}", b);
+            }
+            sb.Append("]");
+            Console.WriteLine(sb.ToString());
+        }
+        else if (o is IEnumerable)
+        {
+            Console.WriteLine(indent + "{");
+            String indent2 = indent + "  ";
+            foreach (Object elem in (o as IEnumerable))
+            {
+                Dump(elem, indent2);
+            }
+            Console.WriteLine(indent + "}");
+        }
+        else 
+        {
+			Console.WriteLine("{0}<unknown> {1}", indent, o.GetType().FullName);
+		}
+	}
+}
+
+internal class PoorManAsn1Parser
+{
+	public PoorManAsn1Parser() 
+	{
+	}
+
+    private void Length(byte[] rawasn1, int offset, out int length, out int lengthLength)
+    {
+        length = 0;
+        lengthLength = 0;
+
+        byte tag = rawasn1[offset];
+        if ((tag & 0x1F) == 0x1F)
+        {
+            throw new NotImplementedException("Tag too long");
+        }
+        offset++;
+        
+        if (rawasn1[offset] == 0x80)
+        {
+            throw new NotImplementedException("Length not defined");
+        }
+
+        if ((rawasn1[offset] & 0x80) == 0) // Length on one byte
+        {
+            length = rawasn1[offset];
+            lengthLength = 1;
+        }
+        else
+        {
+            lengthLength = rawasn1[offset] & 0x7F;
+            if (lengthLength > 4) // Overflow ?
+            {
+                throw new NotImplementedException("Length too long");
+            }
+
+            for (int i = 1; i < lengthLength + 1; i++)
+            {
+                length <<= 7;
+                length |= rawasn1[offset + i];
+            }
+
+            lengthLength++;
+        }
+    }
+
+	public Object Parse(byte[] rawasn1, int offset) 
+	{
+		Object value = null;
+		
+		byte tag = rawasn1[offset];
+		bool isPrimitive = ((tag & 0x20) == 0);
+        byte label = (byte) (tag & 0x17);
+
+        int dataLength;
+        int lengthLength;
+        Length(rawasn1, offset, out dataLength, out lengthLength);
+
+        Console.WriteLine("offset = {0}, tag = {1:x}, length = {2}, lengthLength = {3}", offset, tag, dataLength, lengthLength);
+
+        int dataOffset = offset + lengthLength + 1;
+
+        if (label == 0x1F)
+        {
+            throw new NotImplementedException("Tag too long");
+        }
+
+		if (isPrimitive)
+		{
+			switch (label) 
+			{
+			    case 0x01: // Bool
+                    value = (rawasn1[dataOffset] != 0);
+                    break;
+                case 0x02: // Integer
+                    value = "<Integer>"; // TODO
+                    break;
+                case 0x03: // Bitstring
+                    byte[] bitString = new byte[dataLength - 1];
+                    Array.Copy(rawasn1, dataOffset + 1, bitString, 0, dataLength - 1);
+                    value = bitString;
+                    break;
+                case 0x04: // Octet string
+                    byte[] octetString = new byte[dataLength];
+                    Array.Copy(rawasn1, dataOffset, octetString, 0, dataLength);
+                    value = octetString;
+                    break;
+                case 0x05: // Null
+				    break;
+                case 0x06: // OID
+                    value = "<OID>"; // TODO
+                    break;
+                case 0x13: // PrintableString
+                case 0x16: // IA5String
+                    value = Encoding.ASCII.GetString(rawasn1, dataOffset, dataLength);
+                    break;
+                default:
+                    throw new NotImplementedException(String.Format("Unknown type: {0}", label));
+			}
+		} 
+		else 
+		{
+			IList list = new ArrayList();
+            int thisObjectOffset = dataOffset;
+            do
+            {
+                int thisObjectLength;
+                int thisObjectLengthLength;
+                Length(rawasn1, thisObjectOffset, out thisObjectLength, out thisObjectLengthLength);
+                list.Add(Parse(rawasn1, thisObjectOffset));
+                thisObjectOffset += thisObjectLength + thisObjectLengthLength + 1;
+            } while (thisObjectOffset < dataOffset + dataLength);
+
+            value = list;
+		}
+
+        return value;
+	}
+	
+}