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Add NrbfDecoder Fuzzer (dotnet#107385)
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src/libraries/Fuzzing/DotnetFuzzing/Dictionaries/nrbfdecoder.dict
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@@ -0,0 +1,16 @@ | ||
# "Hello World!" | ||
"\x00\x01\x00\x00\x00\xFF\xFF\xFF\xFF\x01\x00\x00\x00\x00\x00\x00\x00\x06\x01\x00\x00\x00\x0C\x48\x65\x6C\x6C\x6F\x20\x57\x6F\x72\x6C\x64\x21\x0B" | ||
# new DateTime(2024, 2, 29) | ||
"\x00\x01\x00\x00\x00\xFF\xFF\xFF\xFF\x01\x00\x00\x00\x00\x00\x00\x00\x04\x01\x00\x00\x00\x0F\x53\x79\x73\x74\x65\x6D\x2E\x44\x61\x74\x65\x54\x69\x6D\x65\x02\x00\x00\x00\x05\x74\x69\x63\x6B\x73\x08\x64\x61\x74\x65\x44\x61\x74\x61\x00\x00\x09\x10\x00\x00\x60\x5F\xB9\x38\xDC\x08\x00\x00\x60\x5F\xB9\x38\xDC\x08\x0B" | ||
# new int[] { 1, 2, 3 } | ||
"\x00\x01\x00\x00\x00\xFF\xFF\xFF\xFF\x01\x00\x00\x00\x00\x00\x00\x00\x0F\x01\x00\x00\x00\x03\x00\x00\x00\x08\x01\x00\x00\x00\x02\x00\x00\x00\x03\x00\x00\x00\x0B" | ||
# new object[] { int.MaxValue, "string", null } | ||
"\x00\x01\x00\x00\x00\xFF\xFF\xFF\xFF\x01\x00\x00\x00\x00\x00\x00\x00\x10\x01\x00\x00\x00\x03\x00\x00\x00\x08\x08\xFF\xFF\xFF\x7F\x06\x02\x00\x00\x00\x06\x73\x74\x72\x69\x6E\x67\x0A\x0B" | ||
# new int?[Array.MaxLength] (plenty of nulls) | ||
"\x00\x01\x00\x00\x00\xFF\xFF\xFF\xFF\x01\x00\x00\x00\x00\x00\x00\x00\x07\x01\x00\x00\x00\x00\x01\x00\x00\x00\xC7\xFF\xFF\x7F\x03\x6E\x53\x79\x73\x74\x65\x6D\x2E\x4E\x75\x6C\x6C\x61\x62\x6C\x65\x60\x31\x5B\x5B\x53\x79\x73\x74\x65\x6D\x2E\x49\x6E\x74\x33\x32\x2C\x20\x6D\x73\x63\x6F\x72\x6C\x69\x62\x2C\x20\x56\x65\x72\x73\x69\x6F\x6E\x3D\x34\x2E\x30\x2E\x30\x2E\x30\x2C\x20\x43\x75\x6C\x74\x75\x72\x65\x3D\x6E\x65\x75\x74\x72\x61\x6C\x2C\x20\x50\x75\x62\x6C\x69\x63\x4B\x65\x79\x54\x6F\x6B\x65\x6E\x3D\x62\x37\x37\x61\x35\x63\x35\x36\x31\x39\x33\x34\x65\x30\x38\x39\x5D\x5D\x0E\xC7\xFF\xFF\x7F\x0B" | ||
# [["jagged", "array"], ["of", "strings"]] | ||
"\x00\x01\x00\x00\x00\xFF\xFF\xFF\xFF\x01\x00\x00\x00\x00\x00\x00\x00\x07\x01\x00\x00\x00\x01\x01\x00\x00\x00\x02\x00\x00\x00\x06\x09\x02\x00\x00\x00\x09\x03\x00\x00\x00\x11\x02\x00\x00\x00\x02\x00\x00\x00\x06\x04\x00\x00\x00\x06\x6A\x61\x67\x67\x65\x64\x06\x05\x00\x00\x00\x05\x61\x72\x72\x61\x79\x11\x03\x00\x00\x00\x02\x00\x00\x00\x06\x06\x00\x00\x00\x02\x6F\x66\x06\x07\x00\x00\x00\x07\x73\x74\x72\x69\x6E\x67\x73\x0B" | ||
# new Dictionary<string, bool> { { "1", true }, { "2", false } } | ||
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| ||
# new ComplexType2D { I = 1, J = 2 } (non-system class) | ||
"\x00\x01\x00\x00\x00\xFF\xFF\xFF\xFF\x01\x00\x00\x00\x00\x00\x00\x00\x0C\x02\x00\x00\x00\x3D\x42\x66\x44\x65\x6D\x6F\x2C\x20\x56\x65\x72\x73\x69\x6F\x6E\x3D\x31\x2E\x30\x2E\x30\x2E\x30\x2C\x20\x43\x75\x6C\x74\x75\x72\x65\x3D\x6E\x65\x75\x74\x72\x61\x6C\x2C\x20\x50\x75\x62\x6C\x69\x63\x4B\x65\x79\x54\x6F\x6B\x65\x6E\x3D\x6E\x75\x6C\x6C\x05\x01\x00\x00\x00\x14\x42\x66\x44\x65\x6D\x6F\x2E\x43\x6F\x6D\x70\x6C\x65\x78\x54\x79\x70\x65\x32\x44\x02\x00\x00\x00\x01\x49\x01\x4A\x00\x00\x08\x08\x02\x00\x00\x00\x01\x00\x00\x00\x02\x00\x00\x00\x0B" |
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113 changes: 113 additions & 0 deletions
113
src/libraries/Fuzzing/DotnetFuzzing/Fuzzers/NrbfDecoderFuzzer.cs
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,113 @@ | ||
// Licensed to the .NET Foundation under one or more agreements. | ||
// The .NET Foundation licenses this file to you under the MIT license. | ||
|
||
using System.Buffers; | ||
using System.Formats.Nrbf; | ||
using System.Runtime.Serialization; | ||
using System.Text; | ||
|
||
namespace DotnetFuzzing.Fuzzers | ||
{ | ||
internal sealed class NrbfDecoderFuzzer : IFuzzer | ||
{ | ||
public string[] TargetAssemblies { get; } = ["System.Formats.Nrbf"]; | ||
|
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public string[] TargetCoreLibPrefixes => []; | ||
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public string Dictionary => "nrbfdecoder.dict"; | ||
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public void FuzzTarget(ReadOnlySpan<byte> bytes) | ||
{ | ||
using PooledBoundedMemory<byte> inputPoisonedAfter = PooledBoundedMemory<byte>.Rent(bytes, PoisonPagePlacement.After); | ||
using PooledBoundedMemory<byte> inputPoisonedBefore = PooledBoundedMemory<byte>.Rent(bytes, PoisonPagePlacement.Before); | ||
using MemoryStream streamAfter = new MemoryStream(inputPoisonedAfter.Memory.ToArray()); | ||
using MemoryStream streamBefore = new MemoryStream(inputPoisonedBefore.Memory.ToArray()); | ||
|
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Test(inputPoisonedAfter.Span, streamAfter); | ||
Test(inputPoisonedBefore.Span, streamBefore); | ||
} | ||
|
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private static void Test(Span<byte> testSpan, MemoryStream stream) | ||
{ | ||
if (NrbfDecoder.StartsWithPayloadHeader(testSpan)) | ||
{ | ||
try | ||
{ | ||
SerializationRecord record = NrbfDecoder.Decode(stream, out IReadOnlyDictionary<SerializationRecordId, SerializationRecord> recordMap); | ||
switch (record.RecordType) | ||
{ | ||
case SerializationRecordType.ArraySingleObject: | ||
SZArrayRecord<object?> arrayObj = (SZArrayRecord<object?>)record; | ||
object?[] objArray = arrayObj.GetArray(); | ||
Assert.Equal(arrayObj.Length, objArray.Length); | ||
Assert.Equal(1, arrayObj.Rank); | ||
break; | ||
case SerializationRecordType.ArraySingleString: | ||
SZArrayRecord<string?> arrayString = (SZArrayRecord<string?>)record; | ||
string?[] array = arrayString.GetArray(); | ||
Assert.Equal(arrayString.Length, array.Length); | ||
Assert.Equal(1, arrayString.Rank); | ||
Assert.Equal(true, arrayString.TypeNameMatches(typeof(string[]))); | ||
break; | ||
case SerializationRecordType.ArraySinglePrimitive: | ||
case SerializationRecordType.BinaryArray: | ||
ArrayRecord arrayBinary = (ArrayRecord)record; | ||
Assert.NotNull(arrayBinary.TypeName); | ||
break; | ||
case SerializationRecordType.BinaryObjectString: | ||
_ = ((PrimitiveTypeRecord<string>)record).Value; | ||
break; | ||
case SerializationRecordType.ClassWithId: | ||
case SerializationRecordType.ClassWithMembersAndTypes: | ||
case SerializationRecordType.SystemClassWithMembersAndTypes: | ||
ClassRecord classRecord = (ClassRecord)record; | ||
Assert.NotNull(classRecord.TypeName); | ||
|
||
foreach (string name in classRecord.MemberNames) | ||
{ | ||
Assert.Equal(true, classRecord.HasMember(name)); | ||
} | ||
break; | ||
case SerializationRecordType.MemberPrimitiveTyped: | ||
PrimitiveTypeRecord primitiveType = (PrimitiveTypeRecord)record; | ||
Assert.NotNull(primitiveType.Value); | ||
break; | ||
case SerializationRecordType.MemberReference: | ||
Assert.NotNull(record.TypeName); | ||
break; | ||
case SerializationRecordType.BinaryLibrary: | ||
Assert.Equal(false, record.Id.Equals(default)); | ||
break; | ||
case SerializationRecordType.ObjectNull: | ||
case SerializationRecordType.ObjectNullMultiple: | ||
case SerializationRecordType.ObjectNullMultiple256: | ||
Assert.Equal(default, record.Id); | ||
break; | ||
case SerializationRecordType.MessageEnd: | ||
case SerializationRecordType.SerializedStreamHeader: | ||
// case SerializationRecordType.ClassWithMembers: will cause NotSupportedException | ||
// case SerializationRecordType.SystemClassWithMembers: will cause NotSupportedException | ||
default: | ||
throw new Exception("Unexpected RecordType"); | ||
} | ||
} | ||
catch (SerializationException) { /* Reading from the stream encountered invalid NRBF data.*/ } | ||
catch (NotSupportedException) { /* Reading from the stream encountered unsupported records */ } | ||
catch (DecoderFallbackException) { /* Reading from the stream encountered an invalid UTF8 sequence. */ } | ||
catch (EndOfStreamException) { /* The end of the stream was reached before reading SerializationRecordType.MessageEnd record. */ } | ||
catch (IOException) { /* An I/O error occurred. */ } | ||
} | ||
else | ||
{ | ||
try | ||
{ | ||
NrbfDecoder.Decode(stream); | ||
throw new Exception("Decoding supposed to fail!"); | ||
} | ||
catch (SerializationException) { /* Everything has to start with a header */ } | ||
catch (NotSupportedException) { /* Reading from the stream encountered unsupported records */ } | ||
catch (EndOfStreamException) { /* The end of the stream was reached before reading SerializationRecordType.MessageEnd record. */ } | ||
} | ||
} | ||
} | ||
} |
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