mirror of
https://github.com/OPCFoundation/UA-.NETStandard.git
synced 2026-10-21 17:16:16 +08:00
Martin Regen
7a04a4b396
- Add a solution to provide fuzzer support for afl-fuzz and libfuzzer. - Add fuzz targets for Binary, Json and Xml encoder and decoder fuzzing. For afl-fuzz and libfuzzer. - Fix issues in encoders and decoders when unexpected exceptions are returned. The expectation is to return only ServiceResultException with BadDecodingError, BadEncodingError or BadEncodingLimitsExceeded. - Add a tool to create Testcases. - Add a tool to playback crashes and timeouts. - Solution is extensible with common files to discover new fuzz targets by reflection. New fuzz projects can share many files with the first project. - Breaking change: Fix how BinaryDecoder is used: Previously, calling close on the BinaryDecoder implicitly disposed the stream. Change behavior so that `using` pattern can be applied across the board.
74 lines
2.8 KiB
C#
74 lines
2.8 KiB
C#
/* ========================================================================
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* Copyright (c) 2005-2024 The OPC Foundation, Inc. All rights reserved.
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*
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* OPC Foundation MIT License 1.00
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* The complete license agreement can be found here:
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* http://opcfoundation.org/License/MIT/1.00/
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* ======================================================================*/
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using System;
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using System.IO;
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using Opc.Ua;
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using Opc.Ua.Bindings;
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public static partial class FuzzableCode
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{
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private static ServiceMessageContext messageContext = ServiceMessageContext.GlobalContext;
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/// <summary>
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/// Print information about the fuzzer target.
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/// </summary>
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public static void FuzzInfo()
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{
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Console.WriteLine("OPC UA Core Encoder Fuzzer for afl-fuzz and libfuzzer.");
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Console.WriteLine("Fuzzing targets for various aspects of the Binary, Json and Xml encoders.");
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}
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/// <summary>
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/// Prepare a seekable memory stream from the input stream.
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/// </summary>
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private static MemoryStream PrepareArraySegmentStream(Stream stream)
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{
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const int segmentSize = 0x40;
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// afl-fuzz uses a non seekable stream, causing false positives
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// use ArraySegmentStream in combination with fuzz target...
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MemoryStream memoryStream;
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using (var binaryStream = new BinaryReader(stream))
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{
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var bufferCollection = new BufferCollection();
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byte[] buffer;
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do
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{
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buffer = binaryStream.ReadBytes(segmentSize);
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bufferCollection.Add(new ArraySegment<byte>(buffer));
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} while (buffer.Length == segmentSize);
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memoryStream = new ArraySegmentStream(bufferCollection);
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}
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return memoryStream;
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}
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}
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