53 lines
1.9 KiB
C#
53 lines
1.9 KiB
C#
/*
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Copyright (C) 2011-2015 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.Reflection;
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using System.Reflection.Emit;
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using System.Collections.Generic;
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namespace AssemblyData {
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class DelegateStringDecrypter : IStringDecrypter {
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delegate string DecryptString(object[] args);
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List<DecryptString> stringDecryptMethods = new List<DecryptString>();
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public int DefineStringDecrypter(MethodInfo method) {
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stringDecryptMethods.Add(BuildDynamicMethod(method));
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return stringDecryptMethods.Count - 1;
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}
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public object[] DecryptStrings(int stringDecrypterMethod, object[] args, MethodBase caller) {
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if (stringDecrypterMethod > stringDecryptMethods.Count)
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throw new ApplicationException("Invalid string decrypter method");
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var rv = new object[args.Length];
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var stringDecrypter = stringDecryptMethods[stringDecrypterMethod];
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for (int i = 0; i < args.Length; i++)
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rv[i] = stringDecrypter((object[])args[i]);
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return rv;
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}
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DecryptString BuildDynamicMethod(MethodInfo method) {
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var dm = new DynamicMethod("", typeof(string), new Type[] { typeof(object[]) }, typeof(DelegateStringDecrypter), true);
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Utils.AddCallStringDecrypterMethodInstructions(method, dm.GetILGenerator());
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return (DecryptString)dm.CreateDelegate(typeof(DecryptString));
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}
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}
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}
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