Added Grpc.Auth project

src/csharp/Grpc.Auth/.gitignore

+bin
+obj
+*.nupkg

src/csharp/Grpc.Auth/GoogleCredential.cs

+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Threading.Tasks;
+using Grpc.Core;
+using Grpc.Core.Utils;
+
+using Google.Apis.Auth.OAuth2;
+using System.Security.Cryptography.X509Certificates;
+
+namespace Grpc.Auth
+{
+    // TODO(jtattermusch): Remove this class once possible.
+    /// <summary>
+    /// A temporary placeholder for Google credential from 
+    /// Google Auth library for .NET. It emulates the usage pattern 
+    /// for Usable auth.
+    /// </summary>
+    public class GoogleCredential
+    {
+        private const string GoogleApplicationCredentialsEnvName = "GOOGLE_APPLICATION_CREDENTIALS";
+
+        private ServiceCredential credential;
+
+        private GoogleCredential(ServiceCredential credential)
+        {
+            this.credential = credential;
+        }
+
+        public static GoogleCredential GetApplicationDefault()
+        {
+            return new GoogleCredential(null);  
+        }
+
+        public bool IsCreateScopedRequired
+        {
+            get
+            {
+                return true;
+            }
+        }
+
+        public GoogleCredential CreateScoped(IEnumerable<string> scopes)
+        {
+
+            // TODO: also support compute credential.
+
+            //var credsPath = Environment.GetEnvironmentVariable("GOOGLE_APPLICATION_CREDENTIALS");
+            //var credsPath = "/usr/local/google/home/jtattermusch/certs/service_account/stubbyCloudTestingTest-7dd63462c60c.json";
+
+            //JObject o1 = JObject.Parse(File.ReadAllText(credsPath));
+            //string privateKey = o1.GetValue("private_key").Value<string>();
+            //Console.WriteLine(privateKey);
+
+            //var certificate = new X509Certificate2(System.Text.Encoding.UTF8.GetBytes(privateKey), "notasecret", X509KeyStorageFlags.Exportable);
+
+            // TODO: support JSON key file.
+
+            // TODO: get file location from GoogleApplicationCredential env var
+            var certificate = new X509Certificate2("/usr/local/google/home/jtattermusch/certs/stubbyCloudTestingTest-090796e783f3.p12", "notasecret", X509KeyStorageFlags.Exportable);
+
+            // TODO: auth user will be read from the JSON key
+            string authUser = "155450119199-3psnrh1sdr3d8cpj1v46naggf81mhdnk@developer.gserviceaccount.com";
+
+            var serviceCredential = new ServiceAccountCredential(
+                new ServiceAccountCredential.Initializer(authUser)
+                {
+                    Scopes = scopes
+                }.FromCertificate(certificate));
+            return new GoogleCredential(serviceCredential);
+        }
+
+        internal ServiceCredential InternalCredential
+        {
+            get
+            {
+                return credential;
+            }
+        }
+    }
+}

src/csharp/Grpc.Auth/Grpc.Auth.csproj

+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProductVersion>10.0.0</ProductVersion>
+    <SchemaVersion>2.0</SchemaVersion>
+    <ProjectGuid>{AE21D0EE-9A2C-4C15-AB7F-5224EED5B0EA}</ProjectGuid>
+    <OutputType>Library</OutputType>
+    <RootNamespace>Grpc.Auth</RootNamespace>
+    <AssemblyName>Grpc.Auth</AssemblyName>
+    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug</OutputPath>
+    <DefineConstants>DEBUG;</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <ConsolePause>false</ConsolePause>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>full</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <ConsolePause>false</ConsolePause>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="GoogleCredential.cs" />
+    <Compile Include="OAuth2InterceptorFactory.cs" />
+  </ItemGroup>
+  <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
+  <ItemGroup>
+    <ProjectReference Include="..\Grpc.Core\Grpc.Core.csproj">
+      <Project>{CCC4440E-49F7-4790-B0AF-FEABB0837AE7}</Project>
+      <Name>Grpc.Core</Name>
+    </ProjectReference>
+  </ItemGroup>
+</Project>
\ No newline at end of file

src/csharp/Grpc.Auth/OAuth2InterceptorFactory.cs

+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Collections.Immutable;
+using System.Diagnostics;
+using System.IO;
+using System.Text.RegularExpressions;
+using System.Threading;
+using System.Threading.Tasks;
+using Google.ProtocolBuffers;
+using grpc.testing;
+using Grpc.Core;
+using Grpc.Core.Utils;
+using NUnit.Framework;
+
+using Google.Apis.Auth.OAuth2;
+using System.Security.Cryptography.X509Certificates;
+
+namespace Grpc.Auth
+{
+    public static class OAuth2InterceptorFactory
+    {
+        public static HeaderInterceptorDelegate Create(GoogleCredential googleCredential)
+        {
+            ServiceCredential credential = googleCredential.InternalCredential;
+            credential.RequestAccessTokenAsync(CancellationToken.None).Wait();
+            string accessToken = credential.Token.AccessToken;
+
+            // TODO: token refresh logic!!
+            return new HeaderInterceptorDelegate((b)=> { b.Add(new Metadata.MetadataEntry("Authorization", "Bearer " + accessToken)); });
+
+        }
+    }
+}

src/csharp/Grpc.Auth/Properties/AssemblyInfo.cs

+using System.Reflection;
+using System.Runtime.CompilerServices;
+
+[assembly: AssemblyTitle("Grpc.Auth")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("")]
+[assembly: AssemblyCopyright("Google Inc.  All rights reserved.")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+[assembly: AssemblyVersion("0.2.*")]
+
+[assembly: InternalsVisibleTo("Grpc.Auth.Tests")]
\ No newline at end of file

src/csharp/Grpc.sln

@@ -19,6 +19,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Grpc.IntegrationTesting.Ser
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Grpc.Examples.MathServer", "Grpc.Examples.MathServer\Grpc.Examples.MathServer.csproj", "{BF62FE08-373A-43D6-9D73-41CAA38B7011}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Grpc.Auth", "Grpc.Auth\Grpc.Auth.csproj", "{AE21D0EE-9A2C-4C15-AB7F-5224EED5B0EA}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|x86 = Debug|x86
@@ -49,6 +51,10 @@ Global
 		{A654F3B8-E859-4E6A-B30D-227527DBEF0D}.Debug|x86.Build.0 = Debug|x86
 		{A654F3B8-E859-4E6A-B30D-227527DBEF0D}.Release|x86.ActiveCfg = Release|x86
 		{A654F3B8-E859-4E6A-B30D-227527DBEF0D}.Release|x86.Build.0 = Release|x86
+		{AE21D0EE-9A2C-4C15-AB7F-5224EED5B0EA}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{AE21D0EE-9A2C-4C15-AB7F-5224EED5B0EA}.Debug|x86.Build.0 = Debug|Any CPU
+		{AE21D0EE-9A2C-4C15-AB7F-5224EED5B0EA}.Release|x86.ActiveCfg = Release|Any CPU
+		{AE21D0EE-9A2C-4C15-AB7F-5224EED5B0EA}.Release|x86.Build.0 = Release|Any CPU
 		{BF62FE08-373A-43D6-9D73-41CAA38B7011}.Debug|x86.ActiveCfg = Debug|x86
 		{BF62FE08-373A-43D6-9D73-41CAA38B7011}.Debug|x86.Build.0 = Debug|x86
 		{BF62FE08-373A-43D6-9D73-41CAA38B7011}.Release|x86.ActiveCfg = Release|x86