protected override bool CheckHandlerMethod(MethodDef method) {
if (!method.IsStatic || !method.HasBody)
return false;
EmbeddedAssemblyInfo info = null;
var instructions = method.Body.Instructions;
for (int i = 0; i < instructions.Count; i++) {
var instrs = DotNetUtils.GetInstructions(instructions, i, OpCodes.Ldstr, OpCodes.Call);
if (instrs == null)
continue;
var s = instrs[0].Operand as string;
var calledMethod = instrs[1].Operand as IMethod;
if (s == null || calledMethod == null)
continue;
info = assemblyResolverInfo.Find(Utils.GetAssemblySimpleName(s));
if (info != null)
break;
}
if (info == null)
return false;
resourceInfo = info;
Logger.v("Found embedded assemblies resource {0}", Utils.ToCsharpString(info.resourceName));
return true;
}
public static EmbeddedAssemblyInfo create(ModuleDefMD module, string encName, string rsrcName)
{
var info = new EmbeddedAssemblyInfo();
try {
if (encName == "" || Convert.ToBase64String(Convert.FromBase64String(encName)) != encName)
return null;
}
catch (FormatException) {
return null;
}
if (rsrcName.Length > 0 && rsrcName[0] == '[') {
int i = rsrcName.IndexOf(']');
if (i < 0)
return null;
info.flags = rsrcName.Substring(1, i - 1);
info.isTempFile = info.flags.IndexOf('t') >= 0;
info.isCompressed = info.flags.IndexOf('z') >= 0;
rsrcName = rsrcName.Substring(i + 1);
}
if (rsrcName == "")
return null;
info.assemblyName = Encoding.UTF8.GetString(Convert.FromBase64String(encName));
info.resourceName = rsrcName;
info.resource = DotNetUtils.getResource(module, rsrcName) as EmbeddedResource;
info.simpleName = Utils.getAssemblySimpleName(info.assemblyName);
return info;
}
public byte[] RemoveDecryptedResource(EmbeddedAssemblyInfo info) {
if (info == null)
return null;
var data = DecryptResource(info);
if (!assemblyResolverInfo.RemoveEmbeddedAssemblyInfo(info))
throw new ApplicationException(string.Format("Could not remove resource {0}", Utils.ToCsharpString(info.resourceName)));
return data;
}
byte[] decryptResource(EmbeddedAssemblyInfo info)
{
if (info.isCompressed)
return resourceDecrypter.decrypt(info.resource);
else
return info.resource.GetResourceData();
}
public bool canDecryptResource(EmbeddedAssemblyInfo info)
{
if (info == null || !info.isCompressed)
return true;
return resourceDecrypter.CanDecrypt;
}
public bool removeEmbeddedAssemblyInfo(EmbeddedAssemblyInfo info)
{
bool removed = false;
for (int i = 0; i < EmbeddedAssemblyInfos.Count; i++) {
var other = EmbeddedAssemblyInfos[i];
if (info.simpleName == other.simpleName) {
EmbeddedAssemblyInfos.RemoveAt(i--);
removed = true;
}
}
return removed;
}
