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/*
Copyright (C) 2011-2015 de4dot@gmail.com
This file is part of de4dot.
de4dot is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
de4dot is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with de4dot. If not, see <http://www.gnu.org/licenses/>.
*/
using System;
using System.Reflection;
using System.Collections.Generic;
using System.IO;
using System.Xml;
namespace AssemblyData {
class AssemblyResolver {
Dictionary<string, Assembly> assemblies = new Dictionary<string, Assembly>(StringComparer.Ordinal);
Dictionary<string, bool> assemblySearchPathsDict = new Dictionary<string, bool>(StringComparer.OrdinalIgnoreCase);
List<string> assemblySearchPaths = new List<string>();
public AssemblyResolver() {
AppDomain.CurrentDomain.AssemblyResolve += AssemblyResolve;
}
void AddAssemblySearchPath(string path) {
if (assemblySearchPathsDict.ContainsKey(path))
return;
assemblySearchPathsDict[path] = true;
assemblySearchPaths.Add(path);
}
Assembly Get(string assemblyFullName) {
var asmName = new AssemblyName(assemblyFullName);
Assembly assembly;
if (assemblies.TryGetValue(asmName.FullName, out assembly))
return assembly;
if (assemblies.TryGetValue(asmName.Name, out assembly))
return assembly;
return null;
}
static string[] assemblyExtensions = new string[] { ".dll", ".exe" };
Assembly AssemblyResolve(object sender, ResolveEventArgs args) {
var assembly = Get(args.Name);
if (assembly != null)
return assembly;
var asmName = new AssemblyName(args.Name);
foreach (var path in assemblySearchPaths) {
foreach (var ext in assemblyExtensions) {
try {
var filename = Path.Combine(path, asmName.Name + ext);
if (!new FileInfo(filename).Exists)
continue;
AddConfigFile(filename + ".config");
return AddAssembly(Assembly.LoadFile(filename));
}
catch (IOException) {
}
catch (BadImageFormatException) {
}
catch (ArgumentException) {
}
catch (NotSupportedException) {
}
catch (UnauthorizedAccessException) {
}
catch (System.Security.SecurityException) {
}
}
}
return null;
}
public Assembly Load(string filename) {
AddConfigFile(filename + ".config");
return AddAssembly(LoadFile(filename));
}
Assembly LoadFile(string filename) {
try {
return Assembly.LoadFrom(filename);
}
catch (FileLoadException) {
// Here if eg. strong name signature validation failed and possibly other errors
return Assembly.Load(File.ReadAllBytes(filename));
}
}
Assembly AddAssembly(Assembly assembly) {
var asmName = assembly.GetName();
assemblies[asmName.FullName] = assembly;
assemblies[asmName.Name] = assembly;
return assembly;
}
void AddConfigFile(string configFilename) {
var dirName = Utils.GetDirName(Utils.GetFullPath(configFilename));
AddAssemblySearchPath(dirName);
try {
using (var xmlStream = new FileStream(configFilename, FileMode.Open, FileAccess.Read, FileShare.Read)) {
var doc = new XmlDocument();
doc.Load(XmlReader.Create(xmlStream));
foreach (var tmp in doc.GetElementsByTagName("probing")) {
var probingElem = tmp as XmlElement;
if (probingElem == null)
continue;
var privatePath = probingElem.GetAttribute("privatePath");
if (string.IsNullOrEmpty(privatePath))
continue;
foreach (var path in privatePath.Split(';'))
AddAssemblySearchPath(Path.Combine(dirName, path));
}
}
}
catch (IOException) {
}
catch (XmlException) {
}
}
}
}
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