Xpl0itR
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protodec
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Even more improvements 

including but not limited to:
- detect protobuf well-known types
- detect NonUserCodeAttribute
- detect ObsoleteAttribute to mark protobufs/fields as deprecated
- parse generated client/server types for gRPC services
- fix "optional" parsing
- fix obfuscated name translation
- fix foreign nested protobufs
- support protobuf editions and corresponding options
- rewrite protobuf models to better reflect the specification, including decoupling toplevels and files
- rewrite a bunch of things to make more sense
This commit is contained in:
Xpl0itR 2024-06-07 16:01:59 +01:00
parent 68ee943b9d
commit d43deef033
Signed by: Xpl0itR
GPG Key ID: 91798184109676AD
24 changed files with 1175 additions and 371 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
README.md
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@ -10,13 +10,17 @@ Arguments:
target_assembly_path Either the path to the target assembly or a directory of assemblies, all of which be parsed.
out_path An existing directory to output into individual files, otherwise output to a single file.
Options:
--parse_service_servers Parses gRPC service definitions from server classes.
--parse_service_clients Parses gRPC service definitions from client classes.
--skip_enums Skip parsing enums and replace references to them with int32.
--skip_properties_without_protoc_attribute Skip properties that aren't decorated with `GeneratedCode("protoc")` when parsing
--include_properties_without_non_user_code_attribute Includes properties that aren't decorated with `DebuggerNonUserCode` when parsing.
--include_service_methods_without_generated_code_attribute Includes methods that aren't decorated with `GeneratedCode("grpc_csharp_plugin")` when parsing gRPC services.
```
Limitations
-----------
- Integers are assumed to be (u)int32/64 as CIL doesn't differentiate between them and sint32/64 and (s)fixed32/64.
- Package names are not preserved in protobuf compilation so naturally we cannot recover them during decompilation, which may result in naming conflicts.
- When decompiling from [Il2CppDumper](https://github.com/Perfare/Il2CppDumper) DummyDLLs
- The `Name` parameter of `OriginalNameAttribute` is not dumped. In this case, the CIL enum field names are used after conforming them to protobuf conventions

5
protodec.sln
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@ -7,6 +7,11 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "protodec", "src\protodec\pr
EndProject
Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "LibProtodec", "src\LibProtodec\LibProtodec.csproj", "{5F6DAD82-D9AD-4CE5-86E6-D20C9F059A4D}"
EndProject
Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{22F217C3-0FC2-4D06-B5F3-AA1E3AFC402E}"
ProjectSection(SolutionItems) = preProject
README.md = README.md
EndProjectSection
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Any CPU = Debug|Any CPU

34
src/LibProtodec/AssemblyInspector.cs
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@ -35,16 +35,36 @@ public sealed class AssemblyInspector : IDisposable
public IEnumerable<Type> GetProtobufMessageTypes()
{
Type? googleProtobufIMessage = LoadedTypes.SingleOrDefault(static type => type?.FullName == "Google.Protobuf.IMessage", null)
Type? iMessage = LoadedTypes.SingleOrDefault(static type => type?.FullName == "Google.Protobuf.IMessage", null)
?? AssemblyContext.LoadFromAssemblyName("Google.Protobuf")
.GetType("Google.Protobuf.IMessage");
return from type
in LoadedTypes
where !type.IsNested
&& type.IsSealed
return LoadedTypes.Where(
type => type is { IsNested: false, IsSealed: true }
&& type.Namespace?.StartsWith("Google.Protobuf", StringComparison.Ordinal) != true
&& type.IsAssignableTo(googleProtobufIMessage)
select type;
&& type.IsAssignableTo(iMessage));
}
public IEnumerable<Type> GetProtobufServiceClientTypes()
{
Type? clientBase = LoadedTypes.SingleOrDefault(static type => type?.FullName == "Grpc.Core.ClientBase", null)
?? AssemblyContext.LoadFromAssemblyName("Grpc.Core.Api")
.GetType("Grpc.Core.ClientBase");
return LoadedTypes.Where(
type => type is { IsNested: true, IsAbstract: false }
&& type.IsAssignableTo(clientBase));
}
public IEnumerable<Type> GetProtobufServiceServerTypes()
{
Type? bindServiceMethodAttribute = LoadedTypes.SingleOrDefault(static type => type?.FullName == "Grpc.Core.BindServiceMethodAttribute", null)
?? AssemblyContext.LoadFromAssemblyName("Grpc.Core.Api")
.GetType("Grpc.Core.BindServiceMethodAttribute");
return LoadedTypes.Where(
type => type is { IsNested: true, IsAbstract: true, DeclaringType: { IsNested: false, IsSealed: true, IsAbstract: true } }
&& type.GetCustomAttributesData().Any(attribute => attribute.AttributeType == bindServiceMethodAttribute));
}
public void Dispose() =>

46
src/LibProtodec/Enum.cs
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@ -1,46 +0,0 @@
// Copyright © 2023-2024 Xpl0itR
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
using System.CodeDom.Compiler;
using System.Collections.Generic;
using SystemEx.Collections;
namespace LibProtodec;
public sealed class Enum : Protobuf
{
public readonly List<KeyValuePair<int, string>> Fields = [];
public override void WriteFileTo(IndentedTextWriter writer)
{
this.WritePreambleTo(writer);
WriteTo(writer);
}
public override void WriteTo(IndentedTextWriter writer)
{
writer.Write("enum ");
writer.Write(this.Name);
writer.WriteLine(" {");
writer.Indent++;
if (Fields.ContainsDuplicateKey())
{
writer.WriteLine("option allow_alias = true;");
}
foreach ((int id, string name) in Fields)
{
writer.Write(name);
writer.Write(" = ");
writer.Write(id);
writer.WriteLine(';');
}
writer.Indent--;
writer.Write('}');
}
}

26
src/LibProtodec/FieldTypeName.cs
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@ -1,26 +0,0 @@
// Copyright © 2024 Xpl0itR
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
namespace LibProtodec;
public static class FieldTypeName
{
public const string Double = "double";
public const string Float = "float";
public const string Int32 = "int32";
public const string Int64 = "int64";
public const string UInt32 = "uint32";
public const string UInt64 = "uint64";
public const string SInt32 = "sint32";
public const string SInt64 = "sint64";
public const string Fixed32 = "fixed32";
public const string Fixed64 = "fixed64";
public const string SFixed32 = "sfixed32";
public const string SFixed64 = "sfixed64";
public const string Bool = "bool";
public const string String = "string";
public const string Bytes = "bytes";
}

98
src/LibProtodec/Message.cs
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@ -1,98 +0,0 @@
// Copyright © 2023-2024 Xpl0itR
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
using System.CodeDom.Compiler;
using System.Collections.Generic;
using System.IO;
using System.Linq;
namespace LibProtodec;
public sealed class Message : Protobuf
{
public readonly HashSet<string> Imports = [];
public readonly Dictionary<string, int[]> OneOfs = [];
public readonly Dictionary<int, (bool IsOptional, string Type, string Name)> Fields = [];
public readonly Dictionary<string, Protobuf> Nested = [];
public override void WriteFileTo(IndentedTextWriter writer)
{
this.WritePreambleTo(writer);
if (Imports.Count > 0)
{
foreach (string import in Imports)
{
writer.Write("import \"");
writer.Write(import);
writer.WriteLine(".proto\";");
}
writer.WriteLine();
}
WriteTo(writer);
}
public override void WriteTo(IndentedTextWriter writer)
{
writer.Write("message ");
writer.Write(this.Name);
writer.WriteLine(" {");
writer.Indent++;
int[] oneOfs = OneOfs.SelectMany(static oneOf => oneOf.Value).ToArray();
foreach ((int fieldId, (bool, string, string) field) in Fields)
{
if (oneOfs.Contains(fieldId))
continue;
WriteField(writer, fieldId, field);
}
foreach ((string name, int[] fieldIds) in OneOfs)
{
// ReSharper disable once StringLiteralTypo
writer.Write("oneof ");
writer.Write(name);
writer.WriteLine(" {");
writer.Indent++;
foreach (int fieldId in fieldIds)
{
WriteField(writer, fieldId, Fields[fieldId]);
}
writer.Indent--;
writer.WriteLine('}');
}
foreach (Protobuf nested in Nested.Values)
{
nested.WriteTo(writer);
writer.WriteLine();
}
writer.Indent--;
writer.Write('}');
}
private static void WriteField(TextWriter writer, int fieldId, (bool IsOptional, string Type, string Name) field)
{
if (field.IsOptional)
{
writer.Write("optional ");
}
writer.Write(field.Type);
writer.Write(' ');
writer.Write(field.Name);
writer.Write(" = ");
writer.Write(fieldId);
writer.WriteLine(';');
}
}

29
src/LibProtodec/Models/Fields/EnumField.cs Normal file
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@ -0,0 +1,29 @@
// Copyright © 2024 Xpl0itR
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
namespace LibProtodec.Models.Fields;
public sealed class EnumField
{
public required string Name { get; init; }
public required int Id { get; init; }
public bool IsObsolete { get; init; }
public void WriteTo(System.IO.TextWriter writer)
{
writer.Write(Name);
writer.Write(" = ");
writer.Write(Id);
if (IsObsolete)
{
writer.Write(" [deprecated = true]");
}
writer.WriteLine(';');
}
}

42
src/LibProtodec/Models/Fields/MessageField.cs Normal file
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@ -0,0 +1,42 @@
// Copyright © 2024 Xpl0itR
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
using System.IO;
using LibProtodec.Models.TopLevels;
using LibProtodec.Models.Types;
namespace LibProtodec.Models.Fields;
public sealed class MessageField
{
public required IType Type { get; init; }
public required string Name { get; init; }
public required int Id { get; init; }
public bool IsObsolete { get; init; }
public bool HasHasProp { get; init; }
public void WriteTo(TextWriter writer, TopLevel topLevel, bool isOneOf)
{
if (HasHasProp && !isOneOf && Type is not Repeated)
{
writer.Write("optional ");
}
Protobuf.WriteTypeNameTo(writer, Type, topLevel);
writer.Write(' ');
writer.Write(Name);
writer.Write(" = ");
writer.Write(Id);
if (IsObsolete)
{
writer.Write(" [deprecated = true]");
}
writer.WriteLine(';');
}
}

60
src/LibProtodec/Models/Fields/ServiceMethod.cs Normal file
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@ -0,0 +1,60 @@
// Copyright © 2024 Xpl0itR
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
using System.CodeDom.Compiler;
using LibProtodec.Models.TopLevels;
using LibProtodec.Models.Types;
namespace LibProtodec.Models.Fields;
public sealed class ServiceMethod
{
public required string Name { get; init; }
public required IType RequestType { get; init; }
public required IType ResponseType { get; init; }
public bool IsRequestStreamed { get; init; }
public bool IsResponseStreamed { get; init; }
public bool IsObsolete { get; init; }
public void WriteTo(IndentedTextWriter writer, TopLevel topLevel)
{
writer.Write("rpc ");
writer.Write(Name);
writer.Write(" (");
if (IsRequestStreamed)
{
writer.Write("stream ");
}
Protobuf.WriteTypeNameTo(writer, RequestType, topLevel);
writer.Write(") returns (");
if (IsResponseStreamed)
{
writer.Write("stream ");
}
Protobuf.WriteTypeNameTo(writer, ResponseType, topLevel);
writer.Write(')');
if (IsObsolete)
{
writer.WriteLine(" {");
writer.Indent++;
Protobuf.WriteOptionTo(writer, "deprecated", "true");
writer.Indent--;
writer.WriteLine('}');
}
else
{
writer.WriteLine(';');
}
}
}

105
src/LibProtodec/Models/Protobuf.cs Normal file
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@ -0,0 +1,105 @@
// Copyright © 2024 Xpl0itR
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
using System.CodeDom.Compiler;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using LibProtodec.Models.TopLevels;
using LibProtodec.Models.Types;
namespace LibProtodec.Models;
public sealed class Protobuf
{
private HashSet<string>? _imports;
public HashSet<string> Imports =>
_imports ??= [];
public readonly List<TopLevel> TopLevels = [];
public string? Edition { get; set; }
public string? AssemblyName { get; init; }
public string? Namespace { get; init; }
public string FileName =>
$"{TopLevels.FirstOrDefault()?.Name}.proto";
public void WriteTo(IndentedTextWriter writer)
{
writer.WriteLine("// Decompiled with protodec");
if (AssemblyName is not null)
{
writer.Write("// Assembly: ");
writer.WriteLine(AssemblyName);
}
writer.WriteLine();
writer.WriteLine(
Edition is null
? """syntax = "proto3";"""
: $"""edition = "{Edition}";""");
if (_imports is not null)
{
writer.WriteLine();
foreach (string import in _imports)
{
writer.Write("import \"");
writer.Write(import);
writer.WriteLine("\";");
}
}
if (Namespace is not null)
{
writer.WriteLine();
WriteOptionTo(writer, "csharp_namespace", Namespace, true);
}
foreach (TopLevel topLevel in TopLevels)
{
writer.WriteLine();
topLevel.WriteTo(writer);
}
}
public static void WriteOptionTo(TextWriter writer, string name, string value, bool quoteValue = false)
{
writer.Write("option ");
writer.Write(name);
writer.Write(" = ");
if (quoteValue)
{
writer.Write('\"');
}
writer.Write(value);
if (quoteValue)
{
writer.Write('\"');
}
writer.WriteLine(';');
}
public static void WriteTypeNameTo(TextWriter writer, IType type, TopLevel topLevel)
{
if (type is TopLevel { Parent: not null } typeTopLevel && typeTopLevel.Parent != topLevel)
{
writer.Write(
typeTopLevel.QualifyName(topLevel));
}
else
{
writer.Write(type.Name);
}
}
}

67
src/LibProtodec/Models/TopLevels/Enum.cs Normal file
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@ -0,0 +1,67 @@
// Copyright © 2024 Xpl0itR
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
global using Enum = LibProtodec.Models.TopLevels.Enum;
using System.CodeDom.Compiler;
using System.Collections.Generic;
using LibProtodec.Models.Fields;
using LibProtodec.Models.Types;
namespace LibProtodec.Models.TopLevels;
public sealed class Enum : TopLevel, INestableType
{
public readonly List<EnumField> Fields = [];
public override void WriteTo(IndentedTextWriter writer)
{
writer.Write("enum ");
writer.Write(this.Name);
writer.WriteLine(" {");
writer.Indent++;
if (ContainsDuplicateField)
{
Protobuf.WriteOptionTo(writer, "allow_alias", "true");
}
if (this.IsObsolete)
{
Protobuf.WriteOptionTo(writer, "deprecated", "true");
}
if (IsClosed)
{
Protobuf.WriteOptionTo(writer, "features.enum_type", "CLOSED");
}
foreach (EnumField field in Fields)
{
field.WriteTo(writer);
}
writer.Indent--;
writer.Write('}');
}
public bool IsClosed { get; set; }
private bool ContainsDuplicateField
{
get
{
if (Fields.Count < 2)
return false;
HashSet<int> set = [];
foreach (EnumField field in Fields)
if (!set.Add(field.Id))
return true;
return false;
}
}
}

69
src/LibProtodec/Models/TopLevels/Message.cs Normal file
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@ -0,0 +1,69 @@
// Copyright © 2024 Xpl0itR
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
using System.CodeDom.Compiler;
using System.Collections.Generic;
using System.Linq;
using LibProtodec.Models.Fields;
using LibProtodec.Models.Types;
namespace LibProtodec.Models.TopLevels;
public sealed class Message : TopLevel, INestableType
{
public readonly Dictionary<string, int[]> OneOfs = [];
public readonly Dictionary<int, MessageField> Fields = [];
public readonly Dictionary<string, INestableType> Nested = [];
public override void WriteTo(IndentedTextWriter writer)
{
writer.Write("message ");
writer.Write(this.Name);
writer.WriteLine(" {");
writer.Indent++;
if (this.IsObsolete)
{
Protobuf.WriteOptionTo(writer, "deprecated", "true");
}
int[] oneOfs = OneOfs.SelectMany(static oneOf => oneOf.Value).ToArray();
foreach (MessageField field in Fields.Values)
{
if (oneOfs.Contains(field.Id))
continue;
field.WriteTo(writer, this, isOneOf: false);
}
foreach ((string name, int[] fieldIds) in OneOfs)
{
// ReSharper disable once StringLiteralTypo
writer.Write("oneof ");
writer.Write(name);
writer.WriteLine(" {");
writer.Indent++;
foreach (int fieldId in fieldIds)
{
Fields[fieldId].WriteTo(writer, this, isOneOf: true);
}
writer.Indent--;
writer.WriteLine('}');
}
foreach (INestableType nested in Nested.Values)
{
nested.WriteTo(writer);
writer.WriteLine();
}
writer.Indent--;
writer.Write('}');
}
}

37
src/LibProtodec/Models/TopLevels/Service.cs Normal file
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@ -0,0 +1,37 @@
// Copyright © 2024 Xpl0itR
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
using System.CodeDom.Compiler;
using System.Collections.Generic;
using LibProtodec.Models.Fields;
namespace LibProtodec.Models.TopLevels;
public sealed class Service : TopLevel
{
public readonly List<ServiceMethod> Methods = [];
public override void WriteTo(IndentedTextWriter writer)
{
writer.Write("service ");
writer.Write(this.Name);
writer.WriteLine(" {");
writer.Indent++;
if (this.IsObsolete)
{
Protobuf.WriteOptionTo(writer, "deprecated", "true");
}
foreach (ServiceMethod method in Methods)
{
method.WriteTo(writer, this);
}
writer.Indent--;
writer.Write('}');
}
}

35
src/LibProtodec/Models/TopLevels/TopLevel.cs Normal file
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@ -0,0 +1,35 @@
// Copyright © 2024 Xpl0itR
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
using System.CodeDom.Compiler;
using System.Collections.Generic;
namespace LibProtodec.Models.TopLevels;
public abstract class TopLevel
{
public required string Name { get; init; }
public bool IsObsolete { get; init; }
public Protobuf? Protobuf { get; set; }
public TopLevel? Parent { get; set; }
public string QualifyName(TopLevel topLevel)
{
List<string> names = [Name];
TopLevel? parent = Parent;
while (parent is not null && parent != topLevel)
{
names.Add(parent.Name);
parent = parent.Parent;
}
names.Reverse();
return string.Join('.', names);
}
public abstract void WriteTo(IndentedTextWriter writer);
}

14
src/LibProtodec/Models/Types/INestableType.cs Normal file
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@ -0,0 +1,14 @@
// Copyright © 2024 Xpl0itR
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
namespace LibProtodec.Models.Types;
public interface INestableType : IType
{
Protobuf? Protobuf { get; }
void WriteTo(System.CodeDom.Compiler.IndentedTextWriter writer);
}

18
src/LibProtodec/Models/Types/IType.cs Normal file
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@ -0,0 +1,18 @@
// Copyright © 2024 Xpl0itR
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
namespace LibProtodec.Models.Types;
public interface IType
{
string Name { get; }
}
public sealed class External(string typeName) : IType
{
public string Name =>
typeName;
}

13
src/LibProtodec/Models/Types/Map.cs Normal file
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@ -0,0 +1,13 @@
// Copyright © 2024 Xpl0itR
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
namespace LibProtodec.Models.Types;
public sealed class Map(IType typeKey, IType typeVal) : IType
{
public string Name =>
$"map<{typeKey.Name}, {typeVal.Name}>";
}

13
src/LibProtodec/Models/Types/Repeated.cs Normal file
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@ -0,0 +1,13 @@
// Copyright © 2024 Xpl0itR
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
namespace LibProtodec.Models.Types;
public sealed class Repeated(IType type) : IType
{
public string Name =>
$"repeated {type.Name}";
}

27
src/LibProtodec/Models/Types/Scalar.cs Normal file
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@ -0,0 +1,27 @@
// Copyright © 2024 Xpl0itR
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
namespace LibProtodec.Models.Types;
// ReSharper disable StringLiteralTypo
public static class Scalar
{
public static readonly IType Bool = new External("bool");
public static readonly IType Bytes = new External("bytes");
public static readonly IType Double = new External("double");
public static readonly IType Fixed32 = new External("fixed32");
public static readonly IType Fixed64 = new External("fixed64");
public static readonly IType Float = new External("float");
public static readonly IType Int32 = new External("int32");
public static readonly IType Int64 = new External("int64");
public static readonly IType SFixed32 = new External("sfixed32");
public static readonly IType SFixed64 = new External("sfixed64");
public static readonly IType SInt32 = new External("sint32");
public static readonly IType SInt64 = new External("sint64");
public static readonly IType String = new External("string");
public static readonly IType UInt32 = new External("uint32");
public static readonly IType UInt64 = new External("uint64");
}

39
src/LibProtodec/Models/Types/WellKnown.cs Normal file
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@ -0,0 +1,39 @@
// Copyright © 2024 Xpl0itR
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
namespace LibProtodec.Models.Types;
public static class WellKnown
{
public static readonly IType Any = new External("google.protobuf.Any");
public static readonly IType Api = new External("google.protobuf.Api");
public static readonly IType BoolValue = new External("google.protobuf.BoolValue");
public static readonly IType BytesValue = new External("google.protobuf.BytesValue");
public static readonly IType DoubleValue = new External("google.protobuf.DoubleValue");
public static readonly IType Duration = new External("google.protobuf.Duration");
public static readonly IType Empty = new External("google.protobuf.Empty");
public static readonly IType Enum = new External("google.protobuf.Enum");
public static readonly IType EnumValue = new External("google.protobuf.EnumValue");
public static readonly IType Field = new External("google.protobuf.Field");
public static readonly IType FieldMask = new External("google.protobuf.FieldMask");
public static readonly IType FloatValue = new External("google.protobuf.FloatValue");
public static readonly IType Int32Value = new External("google.protobuf.Int32Value");
public static readonly IType Int64Value = new External("google.protobuf.Int64Value");
public static readonly IType ListValue = new External("google.protobuf.ListValue");
public static readonly IType Method = new External("google.protobuf.Method");
public static readonly IType Mixin = new External("google.protobuf.Mixin");
public static readonly IType NullValue = new External("google.protobuf.NullValue");
public static readonly IType Option = new External("google.protobuf.Option");
public static readonly IType SourceContext = new External("google.protobuf.SourceContext");
public static readonly IType StringValue = new External("google.protobuf.StringValue");
public static readonly IType Struct = new External("google.protobuf.Struct");
public static readonly IType Syntax = new External("google.protobuf.Syntax");
public static readonly IType Timestamp = new External("google.protobuf.Timestamp");
public static readonly IType Type = new External("google.protobuf.Type");
public static readonly IType UInt32Value = new External("google.protobuf.UInt32Value");
public static readonly IType UInt64Value = new External("google.protobuf.UInt64Value");
public static readonly IType Value = new External("google.protobuf.Value");
}

16
src/LibProtodec/ParserOptions.cs Normal file
View File

@ -0,0 +1,16 @@
// Copyright © 2024 Xpl0itR
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
namespace LibProtodec;
[System.Flags]
public enum ParserOptions
{
None = 0,
SkipEnums = 1,
IncludePropertiesWithoutNonUserCodeAttribute = 2,
IncludeServiceMethodsWithoutGeneratedCodeAttribute = 4,
}

47
src/LibProtodec/Protobuf.cs
View File

@ -1,47 +0,0 @@
// Copyright © 2023-2024 Xpl0itR
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
using System.CodeDom.Compiler;
using System.IO;
namespace LibProtodec;
public abstract class Protobuf
{
public required string Name { get; init; }
public string? AssemblyName { get; init; }
public string? Namespace { get; init; }
public abstract void WriteFileTo(IndentedTextWriter writer);
public abstract void WriteTo(IndentedTextWriter writer);
protected void WritePreambleTo(TextWriter writer) =>
WritePreambleTo(writer, AssemblyName, Namespace);
// ReSharper disable once MethodOverloadWithOptionalParameter
public static void WritePreambleTo(TextWriter writer, string? assemblyName = null, string? @namespace = null)
{
writer.WriteLine("// Decompiled with protodec");
if (assemblyName is not null)
{
writer.Write("// Assembly: ");
writer.WriteLine(assemblyName);
}
writer.WriteLine();
writer.WriteLine("""syntax = "proto3";""");
writer.WriteLine();
if (@namespace is not null)
{
writer.WriteLine($"""option csharp_namespace = "{@namespace}";""");
writer.WriteLine();
}
}
}

629
src/LibProtodec/ProtodecContext.cs
View File

@ -1,4 +1,4 @@
// Copyright © 2023-2024 Xpl0itR
// Copyright © 2023-2024 Xpl0itR
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
@ -7,89 +7,78 @@
using System;
using System.CodeDom.Compiler;
using System.Collections.Generic;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using System.Reflection;
using SystemEx;
using SystemEx.Collections;
using CommunityToolkit.Diagnostics;
using LibProtodec.Models;
using LibProtodec.Models.Fields;
using LibProtodec.Models.TopLevels;
using LibProtodec.Models.Types;
namespace LibProtodec;
public delegate bool LookupFunc(string key, [MaybeNullWhen(false)] out string value);
public delegate bool TypeLookupFunc(Type type, [NotNullWhen(true)] out IType? fieldType, out string? import);
public delegate bool NameLookupFunc(string name, [MaybeNullWhen(false)] out string translatedName);
public sealed class ProtodecContext
{
private readonly Dictionary<string, Protobuf> _protobufs = [];
private readonly HashSet<string> _currentDescent = [];
private const BindingFlags PublicStatic = BindingFlags.Public | BindingFlags.Static;
private const BindingFlags PublicInstanceDeclared = BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly;
public LookupFunc? CustomTypeLookup { get; init; }
private readonly Dictionary<string, TopLevel> _parsed = [];
public LookupFunc? CustomNameLookup { get; init; }
public readonly List<Protobuf> Protobufs = [];
public IReadOnlyDictionary<string, Protobuf> Protobufs =>
_protobufs;
public NameLookupFunc? NameLookup { get; set; }
public TypeLookupFunc TypeLookup { get; set; } =
LookupScalarAndWellKnownTypes;
public void WriteAllTo(IndentedTextWriter writer)
{
Protobuf.WritePreambleTo(writer);
writer.WriteLine("// Decompiled with protodec");
writer.WriteLine();
writer.WriteLine("""syntax = "proto3";""");
writer.WriteLine();
foreach (Protobuf proto in _protobufs.Values)
foreach (TopLevel topLevel in Protobufs.SelectMany(static proto => proto.TopLevels))
{
proto.WriteTo(writer);
topLevel.WriteTo(writer);
writer.WriteLine();
writer.WriteLine();
}
}
public void ParseMessage(Type type, bool skipEnums = false, bool skipPropertiesWithoutProtocAttribute = false)
public Message ParseMessage(Type messageClass, ParserOptions options = ParserOptions.None)
{
Guard.IsTrue(type.IsClass);
Guard.IsTrue(messageClass is { IsClass: true, IsSealed: true });
ParseMessageInternal(type, skipEnums, skipPropertiesWithoutProtocAttribute, null);
_currentDescent.Clear();
}
public void ParseEnum(Type type)
if (_parsed.TryGetValue(messageClass.FullName ?? messageClass.Name, out TopLevel? parsedMessage))
{
Guard.IsTrue(type.IsEnum);
ParseEnumInternal(type, null);
_currentDescent.Clear();
}
private bool IsParsed(Type type, Message? parentMessage, out Dictionary<string, Protobuf> protobufs)
{
protobufs = parentMessage is not null && type.IsNested
? parentMessage.Nested
: _protobufs;
return protobufs.ContainsKey(type.Name)
|| !_currentDescent.Add(type.Name);
}
private void ParseMessageInternal(Type messageClass, bool skipEnums, bool skipPropertiesWithoutProtocAttribute, Message? parentMessage)
{
if (IsParsed(messageClass, parentMessage, out Dictionary<string, Protobuf> protobufs))
{
return;
return (Message)parsedMessage;
}
Message message = new()
{
Name = TranslateProtobufName(messageClass.Name),
AssemblyName = messageClass.Assembly.FullName,
Namespace = messageClass.Namespace
Name = TranslateTypeName(messageClass),
IsObsolete = HasObsoleteAttribute(messageClass.GetCustomAttributesData())
};
_parsed.Add(messageClass.FullName ?? messageClass.Name, message);
FieldInfo[] idFields = messageClass.GetFields(BindingFlags.Public | BindingFlags.Static);
PropertyInfo[] properties = messageClass.GetProperties(BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly);
Protobuf protobuf = GetProtobuf(messageClass, message, options);
FieldInfo[] idFields = messageClass.GetFields(PublicStatic);
PropertyInfo[] properties = messageClass.GetProperties(PublicInstanceDeclared);
for (int pi = 0, fi = 0; pi < properties.Length; pi++, fi++)
{
PropertyInfo property = properties[pi];
IList<CustomAttributeData> attributes = property.GetCustomAttributesData();
if ((skipPropertiesWithoutProtocAttribute && !HasProtocAttribute(property))
if (((options & ParserOptions.IncludePropertiesWithoutNonUserCodeAttribute) == 0 && !HasNonUserCodeAttribute(attributes))
|| property.GetMethod?.IsVirtual != false)
{
fi--;
@ -99,11 +88,10 @@ public sealed class ProtodecContext
Type propertyType = property.PropertyType;
// only OneOf enums are defined nested directly in the message class
if (propertyType.IsEnum
&& propertyType.DeclaringType?.Name == messageClass.Name)
if (propertyType.IsEnum && propertyType.DeclaringType?.Name == messageClass.Name)
{
string oneOfName = TranslateOneOfName(property.Name);
int[] oneOfProtoFieldIds = propertyType.GetFields(BindingFlags.Public | BindingFlags.Static)
string oneOfName = TranslateOneOfPropName(property.Name);
int[] oneOfProtoFieldIds = propertyType.GetFields(PublicStatic)
.Select(static field => (int)field.GetRawConstantValue()!)
.Where(static id => id > 0)
.ToArray();
@ -118,126 +106,320 @@ public sealed class ProtodecContext
Guard.IsTrue(idField.IsLiteral);
Guard.IsEqualTo(idField.FieldType.Name, nameof(Int32));
int msgFieldId = (int)idField.GetRawConstantValue()!;
bool msgFieldIsOptional = false;
string msgFieldType = ParseFieldType(propertyType, skipEnums, skipPropertiesWithoutProtocAttribute, message);
string msgFieldName = TranslateMessageFieldName(property.Name);
// optional protobuf fields will generate an additional "Has" get-only boolean property immediately after the real property
bool msgFieldHasHasProp = false; // some field properties are immediately followed by an additional "Has" get-only boolean property
if (properties.Length > pi + 1 && properties[pi + 1].PropertyType.Name == nameof(Boolean) && !properties[pi + 1].CanWrite)
{
msgFieldIsOptional = true;
msgFieldHasHasProp = true;
pi++;
}
message.Fields.Add(msgFieldId, (msgFieldIsOptional, msgFieldType, msgFieldName));
MessageField field = new()
{
Type = ParseFieldType(propertyType, options, protobuf),
Name = TranslateMessageFieldName(property.Name),
Id = (int)idField.GetRawConstantValue()!,
IsObsolete = HasObsoleteAttribute(attributes),
HasHasProp = msgFieldHasHasProp
};
message.Fields.Add(field.Id, field);
}
protobufs.Add(message.Name, message);
return message;
}
private void ParseEnumInternal(Type enumEnum, Message? parentMessage)
public Enum ParseEnum(Type enumEnum, ParserOptions options = ParserOptions.None)
{
if (IsParsed(enumEnum, parentMessage, out Dictionary<string, Protobuf> protobufs))
Guard.IsTrue(enumEnum.IsEnum);
if (_parsed.TryGetValue(enumEnum.FullName ?? enumEnum.Name, out TopLevel? parsedEnum))
{
return;
return (Enum)parsedEnum;
}
Enum @enum = new()
{
Name = TranslateProtobufName(enumEnum.Name),
AssemblyName = enumEnum.Assembly.FullName,
Namespace = enumEnum.Namespace
Name = TranslateTypeName(enumEnum),
IsObsolete = HasObsoleteAttribute(enumEnum.GetCustomAttributesData())
};
_parsed.Add(enumEnum.FullName ?? enumEnum.Name, @enum);
foreach (FieldInfo field in enumEnum.GetFields(BindingFlags.Public | BindingFlags.Static))
Protobuf protobuf = GetProtobuf(enumEnum, @enum, options);
foreach (FieldInfo field in enumEnum.GetFields(PublicStatic))
{
int enumFieldId = (int)field.GetRawConstantValue()!;
string enumFieldName = TranslateEnumFieldName(field, @enum.Name);
@enum.Fields.Add(enumFieldId, enumFieldName);
@enum.Fields.Add(
new EnumField
{
Id = (int)field.GetRawConstantValue()!,
Name = TranslateEnumFieldName(field, @enum.Name),
IsObsolete = HasObsoleteAttribute(field.GetCustomAttributesData())
});
}
protobufs.Add(@enum.Name, @enum);
if (@enum.Fields.All(static field => field.Id != 0))
{
protobuf.Edition = "2023";
@enum.IsClosed = true;
}
private string ParseFieldType(Type type, bool skipEnums, bool skipPropertiesWithoutProtocAttribute, Message message)
{
switch (type.Name)
{
case "ByteString":
return FieldTypeName.Bytes;
case nameof(String):
return FieldTypeName.String;
case nameof(Boolean):
return FieldTypeName.Bool;
case nameof(Double):
return FieldTypeName.Double;
case nameof(UInt32):
return FieldTypeName.UInt32;
case nameof(UInt64):
return FieldTypeName.UInt64;
case nameof(Int32):
return FieldTypeName.Int32;
case nameof(Int64):
return FieldTypeName.Int64;
case nameof(Single):
return FieldTypeName.Float;
return @enum;
}
public Service ParseService(Type serviceClass, ParserOptions options = ParserOptions.None)
{
Guard.IsTrue(serviceClass.IsClass);
bool? isClientClass = null;
if (serviceClass.IsAbstract)
{
if (serviceClass is { IsSealed: true, IsNested: false })
{
Type[] nested = serviceClass.GetNestedTypes();
serviceClass = nested.SingleOrDefault(static nested => nested is { IsAbstract: true, IsSealed: false })
?? nested.Single(static nested => nested is { IsClass: true, IsAbstract: false });
}
if (serviceClass is { IsNested: true, IsAbstract: true, IsSealed: false })
{
isClientClass = false;
}
}
if (serviceClass is { IsAbstract: false, IsNested: true, DeclaringType: not null })
{
isClientClass = true;
}
Guard.IsNotNull(isClientClass);
if (_parsed.TryGetValue(serviceClass.DeclaringType!.FullName ?? serviceClass.DeclaringType!.Name, out TopLevel? parsedService))
{
return (Service)parsedService;
}
Service service = new()
{
Name = TranslateTypeName(serviceClass.DeclaringType),
IsObsolete = HasObsoleteAttribute(serviceClass.GetCustomAttributesData())
};
_parsed.Add(serviceClass.DeclaringType!.FullName ?? serviceClass.DeclaringType.Name, service);
Protobuf protobuf = NewProtobuf(serviceClass, service);
foreach (MethodInfo method in serviceClass.GetMethods(PublicInstanceDeclared))
{
IList<CustomAttributeData> attributes = method.GetCustomAttributesData();
if ((options & ParserOptions.IncludeServiceMethodsWithoutGeneratedCodeAttribute) == 0
&& !HasGeneratedCodeAttribute(attributes, "grpc_csharp_plugin"))
{
continue;
}
Type requestType, responseType, returnType = method.ReturnType;
bool streamReq, streamRes;
if (isClientClass.Value)
{
string returnTypeName = TranslateTypeName(returnType);
if (returnTypeName == "AsyncUnaryCall`1")
{
continue;
}
ParameterInfo[] parameters = method.GetParameters();
if (parameters.Length > 2)
{
continue;
}
Type firstParamType = parameters[0].ParameterType;
switch (returnType.GenericTypeArguments.Length)
{
case 2:
requestType = returnType.GenericTypeArguments[0];
responseType = returnType.GenericTypeArguments[1];
streamReq = true;
streamRes = returnTypeName == "AsyncDuplexStreamingCall`2";
break;
case 1:
requestType = firstParamType;
responseType = returnType.GenericTypeArguments[0];
streamReq = false;
streamRes = true;
break;
default:
requestType = firstParamType;
responseType = returnType;
streamReq = false;
streamRes = false;
break;
}
}
else
{
ParameterInfo[] parameters = method.GetParameters();
Type firstParamType = parameters[0].ParameterType;
if (firstParamType.GenericTypeArguments.Length == 1)
{
streamReq = true;
requestType = firstParamType.GenericTypeArguments[0];
}
else
{
streamReq = false;
requestType = firstParamType;
}
if (returnType.GenericTypeArguments.Length == 1)
{
streamRes = false;
responseType = returnType.GenericTypeArguments[0];
}
else
{
streamRes = true;
responseType = parameters[1].ParameterType.GenericTypeArguments[0];
}
}
service.Methods.Add(
new ServiceMethod
{
Name = TranslateMethodName(method.Name),
IsObsolete = HasObsoleteAttribute(attributes),
RequestType = ParseFieldType(requestType, options, protobuf),
ResponseType = ParseFieldType(responseType, options, protobuf),
IsRequestStreamed = streamReq,
IsResponseStreamed = streamRes
});
}
return service;
}
private IType ParseFieldType(Type type, ParserOptions options, Protobuf referencingProtobuf)
{
switch (type.GenericTypeArguments.Length)
{
case 1:
string t = ParseFieldType(type.GenericTypeArguments[0], skipEnums, skipPropertiesWithoutProtocAttribute, message);
return "repeated " + t;
return new Repeated(
ParseFieldType(type.GenericTypeArguments[0], options, referencingProtobuf));
case 2:
string t1 = ParseFieldType(type.GenericTypeArguments[0], skipEnums, skipPropertiesWithoutProtocAttribute, message);
string t2 = ParseFieldType(type.GenericTypeArguments[1], skipEnums, skipPropertiesWithoutProtocAttribute, message);
return $"map<{t1}, {t2}>";
return new Map(
ParseFieldType(type.GenericTypeArguments[0], options, referencingProtobuf),
ParseFieldType(type.GenericTypeArguments[1], options, referencingProtobuf));
}
if (CustomTypeLookup?.Invoke(type.Name, out string? fieldType) == true)
if (TypeLookup(type, out IType? fieldType, out string? import))
{
if (import is not null)
{
referencingProtobuf.Imports.Add(import);
}
return fieldType;
}
if (type.IsEnum)
{
if (skipEnums)
if ((options & ParserOptions.SkipEnums) > 0)
{
return FieldTypeName.Int32;
return Scalar.Int32;
}
ParseEnumInternal(type, message);
fieldType = ParseEnum(type, options);
}
else
{
ParseMessageInternal(type, skipEnums, skipPropertiesWithoutProtocAttribute, message);
fieldType = ParseMessage(type, options);
}
if (!type.IsNested)
Protobuf protobuf = ((INestableType)fieldType).Protobuf!;
if (referencingProtobuf != protobuf)
{
message.Imports.Add(type.Name);
referencingProtobuf.Imports.Add(protobuf.FileName);
}
return type.Name;
return fieldType;
}
private string TranslateProtobufName(string name) =>
CustomNameLookup?.Invoke(name, out string? translatedName) == true
? translatedName
: name;
private Protobuf NewProtobuf(Type topLevelType, TopLevel topLevel)
{
Protobuf protobuf = new()
{
AssemblyName = topLevelType.Assembly.FullName,
Namespace = topLevelType.Namespace
};
private string TranslateOneOfName(string oneOfEnumName) =>
TranslateName(oneOfEnumName, out string translatedName)
? translatedName.TrimEnd("Case")
: oneOfEnumName.TrimEnd("Case")
.ToSnakeCaseLower();
topLevel.Protobuf = protobuf;
protobuf.TopLevels.Add(topLevel);
Protobufs.Add(protobuf);
private string TranslateMessageFieldName(string fieldName) =>
TranslateName(fieldName, out string translatedName)
return protobuf;
}
private Protobuf GetProtobuf<T>(Type topLevelType, T topLevel, ParserOptions options)
where T : TopLevel, INestableType
{
Protobuf protobuf;
if (topLevelType.IsNested)
{
Type parent = topLevelType.DeclaringType!.DeclaringType!;
if (!_parsed.TryGetValue(parent.FullName ?? parent.Name, out TopLevel? parentTopLevel))
{
parentTopLevel = ParseMessage(parent, options);
}
protobuf = parentTopLevel.Protobuf!;
topLevel.Protobuf = protobuf;
topLevel.Parent = parentTopLevel;
((Message)parentTopLevel).Nested.Add(topLevelType.Name, topLevel);
}
else
{
protobuf = NewProtobuf(topLevelType, topLevel);
}
return protobuf;
}
private string TranslateMethodName(string methodName) =>
NameLookup?.Invoke(methodName, out string? translatedName) == true
? translatedName
: fieldName.ToSnakeCaseLower();
: methodName;
private string TranslateOneOfPropName(string oneOfPropName)
{
if (NameLookup?.Invoke(oneOfPropName, out string? translatedName) != true)
{
if (IsBeebyted(oneOfPropName))
{
return oneOfPropName;
}
translatedName = oneOfPropName;
}
return translatedName!.TrimEnd("Case").ToSnakeCaseLower();
}
private string TranslateMessageFieldName(string fieldName)
{
if (NameLookup?.Invoke(fieldName, out string? translatedName) != true)
{
if (IsBeebyted(fieldName))
{
return fieldName;
}
translatedName = fieldName;
}
return translatedName!.ToSnakeCaseLower();
}
private string TranslateEnumFieldName(FieldInfo field, string enumName)
{
@ -250,9 +432,14 @@ public sealed class ProtodecContext
return originalName;
}
if (TranslateName(field.Name, out string translatedName))
if (NameLookup?.Invoke(field.Name, out string? fieldName) != true)
{
return translatedName;
fieldName = field.Name;
}
if (!IsBeebyted(fieldName!))
{
fieldName = fieldName!.ToSnakeCaseUpper();
}
if (!IsBeebyted(enumName))
@ -260,26 +447,208 @@ public sealed class ProtodecContext
enumName = enumName.ToSnakeCaseUpper();
}
return enumName + '_' + field.Name.ToSnakeCaseUpper();
return enumName + '_' + fieldName;
}
private bool TranslateName(string name, out string translatedName)
private string TranslateTypeName(Type type)
{
if (CustomNameLookup?.Invoke(name, out translatedName!) == true)
if (NameLookup is null)
return type.Name;
string? fullName = type.FullName;
Guard.IsNotNull(fullName);
int genericArgs = fullName.IndexOf('[');
if (genericArgs != -1)
fullName = fullName[..genericArgs];
if (!NameLookup(fullName, out string? translatedName))
{
return type.Name;
}
int lastSlash = translatedName.LastIndexOf('/');
if (lastSlash != -1)
translatedName = translatedName[lastSlash..];
int lastDot = translatedName.LastIndexOf('.');
if (lastDot != -1)
translatedName = translatedName[lastDot..];
return translatedName;
}
public static bool LookupScalarAndWellKnownTypes(Type type, [NotNullWhen(true)] out IType? fieldType, out string? import)
{
switch (type.FullName)
{
case "System.String":
import = null;
fieldType = Scalar.String;
return true;
case "System.Boolean":
import = null;
fieldType = Scalar.Bool;
return true;
case "System.Double":
import = null;
fieldType = Scalar.Double;
return true;
case "System.UInt32":
import = null;
fieldType = Scalar.UInt32;
return true;
case "System.UInt64":
import = null;
fieldType = Scalar.UInt64;
return true;
case "System.Int32":
import = null;
fieldType = Scalar.Int32;
return true;
case "System.Int64":
import = null;
fieldType = Scalar.Int64;
return true;
case "System.Single":
import = null;
fieldType = Scalar.Float;
return true;
case "Google.Protobuf.ByteString":
import = null;
fieldType = Scalar.Bytes;
return true;
case "Google.Protobuf.WellKnownTypes.Any":
import = "google/protobuf/any.proto";
fieldType = WellKnown.Any;
return true;
case "Google.Protobuf.WellKnownTypes.Api":
import = "google/protobuf/api.proto";
fieldType = WellKnown.Api;
return true;
case "Google.Protobuf.WellKnownTypes.BoolValue":
import = "google/protobuf/wrappers.proto";
fieldType = WellKnown.BoolValue;
return true;
case "Google.Protobuf.WellKnownTypes.BytesValue":
import = "google/protobuf/wrappers.proto";
fieldType = WellKnown.BytesValue;
return true;
case "Google.Protobuf.WellKnownTypes.DoubleValue":
import = "google/protobuf/wrappers.proto";
fieldType = WellKnown.DoubleValue;
return true;
case "Google.Protobuf.WellKnownTypes.Duration":
import = "google/protobuf/duration.proto";
fieldType = WellKnown.Duration;
return true;
case "Google.Protobuf.WellKnownTypes.Empty":
import = "google/protobuf/empty.proto";
fieldType = WellKnown.Empty;
return true;
case "Google.Protobuf.WellKnownTypes.Enum":
import = "google/protobuf/type.proto";
fieldType = WellKnown.Enum;
return true;
case "Google.Protobuf.WellKnownTypes.EnumValue":
import = "google/protobuf/type.proto";
fieldType = WellKnown.EnumValue;
return true;
case "Google.Protobuf.WellKnownTypes.Field":
import = "google/protobuf/type.proto";
fieldType = WellKnown.Field;
return true;
case "Google.Protobuf.WellKnownTypes.FieldMask":
import = "google/protobuf/field_mask.proto";
fieldType = WellKnown.FieldMask;
return true;
case "Google.Protobuf.WellKnownTypes.FloatValue":
import = "google/protobuf/wrappers.proto";
fieldType = WellKnown.FloatValue;
return true;
case "Google.Protobuf.WellKnownTypes.Int32Value":
import = "google/protobuf/wrappers.proto";
fieldType = WellKnown.Int32Value;
return true;
case "Google.Protobuf.WellKnownTypes.Int64Value":
import = "google/protobuf/wrappers.proto";
fieldType = WellKnown.Int64Value;
return true;
case "Google.Protobuf.WellKnownTypes.ListValue":
import = "google/protobuf/struct.proto";
fieldType = WellKnown.ListValue;
return true;
case "Google.Protobuf.WellKnownTypes.Method":
import = "google/protobuf/api.proto";
fieldType = WellKnown.Method;
return true;
case "Google.Protobuf.WellKnownTypes.Mixin":
import = "google/protobuf/api.proto";
fieldType = WellKnown.Mixin;
return true;
case "Google.Protobuf.WellKnownTypes.NullValue":
import = "google/protobuf/struct.proto";
fieldType = WellKnown.NullValue;
return true;
case "Google.Protobuf.WellKnownTypes.Option":
import = "google/protobuf/type.proto";
fieldType = WellKnown.Option;
return true;
case "Google.Protobuf.WellKnownTypes.SourceContext":
import = "google/protobuf/source_context.proto";
fieldType = WellKnown.SourceContext;
return true;
case "Google.Protobuf.WellKnownTypes.StringValue":
import = "google/protobuf/wrappers.proto";
fieldType = WellKnown.StringValue;
return true;
case "Google.Protobuf.WellKnownTypes.Struct":
import = "google/protobuf/struct.proto";
fieldType = WellKnown.Struct;
return true;
case "Google.Protobuf.WellKnownTypes.Syntax":
import = "google/protobuf/type.proto";
fieldType = WellKnown.Syntax;
return true;
case "Google.Protobuf.WellKnownTypes.Timestamp":
import = "google/protobuf/timestamp.proto";
fieldType = WellKnown.Timestamp;
return true;
case "Google.Protobuf.WellKnownTypes.Type":
import = "google/protobuf/type.proto";
fieldType = WellKnown.Type;
return true;
case "Google.Protobuf.WellKnownTypes.UInt32Value":
import = "google/protobuf/wrappers.proto";
fieldType = WellKnown.UInt32Value;
return true;
case "Google.Protobuf.WellKnownTypes.UInt64Value":
import = "google/protobuf/wrappers.proto";
fieldType = WellKnown.UInt64Value;
return true;
case "Google.Protobuf.WellKnownTypes.Value":
import = "google/protobuf/struct.proto";
fieldType = WellKnown.Value;
return true;
}
translatedName = name;
return IsBeebyted(name);
default:
import = null;
fieldType = null;
return false;
}
}
// ReSharper disable once IdentifierTypo
private static bool IsBeebyted(string name) =>
name.Length == 11 && name.CountUpper() == 11;
private static bool HasProtocAttribute(MemberInfo member) =>
member.GetCustomAttributesData()
.Any(static attr => attr.AttributeType.Name == nameof(GeneratedCodeAttribute)
&& attr.ConstructorArguments[0].Value as string == "protoc");
private static bool HasGeneratedCodeAttribute(IEnumerable<CustomAttributeData> attributes, string tool) =>
attributes.Any(attr => attr.AttributeType.Name == nameof(GeneratedCodeAttribute)
&& attr.ConstructorArguments[0].Value as string == tool);
private static bool HasNonUserCodeAttribute(IEnumerable<CustomAttributeData> attributes) =>
attributes.Any(static attr => attr.AttributeType.Name == nameof(DebuggerNonUserCodeAttribute));
private static bool HasObsoleteAttribute(IEnumerable<CustomAttributeData> attributes) =>
attributes.Any(static attr => attr.AttributeType.Name == nameof(ObsoleteAttribute));
}

61
src/protodec/Program.cs
View File

@ -1,8 +1,10 @@
using System;
using System.CodeDom.Compiler;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using LibProtodec;
using LibProtodec.Models;
const string indent = " ";
const string help = """
@ -11,8 +13,11 @@ const string help = """
target_assembly_path Either the path to the target assembly or a directory of assemblies, all of which be parsed.
out_path An existing directory to output into individual files, otherwise output to a single file.
Options:
--parse_service_servers Parses gRPC service definitions from server classes.
--parse_service_clients Parses gRPC service definitions from client classes.
--skip_enums Skip parsing enums and replace references to them with int32.
--skip_properties_without_protoc_attribute Skip properties that aren't decorated with `GeneratedCode("protoc")` when parsing
--include_properties_without_non_user_code_attribute Includes properties that aren't decorated with `DebuggerNonUserCode` when parsing.
--include_service_methods_without_generated_code_attribute Includes methods that aren't decorated with `GeneratedCode("grpc_csharp_plugin")` when parsing gRPC services.
""";
if (args.Length < 2)
@ -21,29 +26,63 @@ if (args.Length < 2)
return;
}
string assemblyPath = args[0];
string assembly = args[0];
string outPath = Path.GetFullPath(args[1]);
bool skipEnums = args.Contains("--skip_enums");
bool skipPropertiesWithoutProtocAttribute = args.Contains("--skip_properties_without_protoc_attribute");
ParserOptions options = ParserOptions.None;
using AssemblyInspector inspector = new(assemblyPath);
if (args.Contains("--skip_enums"))
options |= ParserOptions.SkipEnums;
if (args.Contains("--include_properties_without_non_user_code_attribute"))
options |= ParserOptions.IncludePropertiesWithoutNonUserCodeAttribute;
if (args.Contains("--include_service_methods_without_generated_code_attribute"))
options |= ParserOptions.IncludeServiceMethodsWithoutGeneratedCodeAttribute;
using AssemblyInspector inspector = new(assembly);
ProtodecContext ctx = new();
foreach (Type message in inspector.GetProtobufMessageTypes())
{
ctx.ParseMessage(message, skipEnums, skipPropertiesWithoutProtocAttribute);
ctx.ParseMessage(message, options);
}
if (args.Contains("--parse_service_servers"))
{
foreach (Type service in inspector.GetProtobufServiceServerTypes())
{
ctx.ParseService(service, options);
}
}
if (args.Contains("--parse_service_clients"))
{
foreach (Type service in inspector.GetProtobufServiceClientTypes())
{
ctx.ParseService(service, options);
}
}
if (Directory.Exists(outPath))
{
foreach (Protobuf proto in ctx.Protobufs.Values)
{
string protoPath = Path.Join(outPath, proto.Name + ".proto");
HashSet<string> writtenFiles = [];
using StreamWriter streamWriter = new(protoPath);
foreach (Protobuf protobuf in ctx.Protobufs)
{
// This workaround stops files from being overwritten in the case of a naming conflict,
// however the actual conflict will still have to be resolved manually
string fileName = protobuf.FileName;
while (!writtenFiles.Add(fileName))
{
fileName = '_' + fileName;
}
string protobufPath = Path.Join(outPath, fileName);
using StreamWriter streamWriter = new(protobufPath);
using IndentedTextWriter indentWriter = new(streamWriter, indent);
proto.WriteFileTo(indentWriter);
protobuf.WriteTo(indentWriter);
}
}
else