71 lines
1.9 KiB
C#
71 lines
1.9 KiB
C#
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/*
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Copyright (C) 2011-2012 de4dot@gmail.com
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This file is part of de4dot.
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de4dot is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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de4dot is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with de4dot. If not, see <http://www.gnu.org/licenses/>.
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*/
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using System;
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using System.IO;
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using Mono.Cecil;
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namespace de4dot.code.deobfuscators.CodeVeil {
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class ResourceDecrypter {
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ModuleDefinition module;
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public ResourceDecrypter(ModuleDefinition module) {
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this.module = module;
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}
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public void decrypt() {
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for (int i = 0; i < module.Resources.Count; i++) {
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var resource = module.Resources[i] as EmbeddedResource;
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if (resource == null)
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continue;
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var decrypted = decrypt(resource.GetResourceStream());
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if (decrypted == null)
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continue;
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module.Resources[i] = new EmbeddedResource(resource.Name, resource.Attributes, decrypted);
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}
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}
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byte[] decrypt(Stream stream) {
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try {
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stream.Position = 0;
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var reader = new BinaryReader(stream);
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uint sig = reader.ReadUInt32();
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if (sig == 0xBEEFCACE)
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return decryptBeefcace(reader);
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//TODO: Decrypt the other type
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return null;
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}
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catch (ApplicationException) {
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return null;
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}
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catch (Exception ex) {
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Log.w("Got an exception when decrypting resources: {0}", ex.GetType());
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return null;
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}
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}
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byte[] decryptBeefcace(BinaryReader reader) {
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var resourceReader = new ResourceReader(reader);
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return new ResourceConverter(module, resourceReader.read()).convert();
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}
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}
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}
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