add roots.pem as a resource

src/csharp/Grpc.Core/Grpc.Core.csproj

@@ -128,6 +128,7 @@
     <Compile Include="Profiling\ProfilerScope.cs" />
     <Compile Include="Profiling\IProfiler.cs" />
     <Compile Include="Profiling\Profilers.cs" />
+    <Compile Include="Internal\DefaultSslRootsOverride.cs" />
   </ItemGroup>
   <ItemGroup>
     <None Include="Grpc.Core.nuspec" />
@@ -135,4 +136,12 @@
   </ItemGroup>
   <Import Project="NativeDeps.targets" />
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
+  <ItemGroup>
+    <Folder Include="Resources\" />
+  </ItemGroup>
+  <ItemGroup>
+    <EmbeddedResource Include="..\..\..\etc\roots.pem">
+      <Link>Resources\roots.pem</Link>
+    </EmbeddedResource>
+  </ItemGroup>
 </Project>
\ No newline at end of file

src/csharp/Grpc.Core/Internal/DefaultSslRootsOverride.cs

+#region Copyright notice and license
+
+// Copyright 2015-2016, 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.Concurrent;
+using System.Diagnostics;
+using System.IO;
+using System.Reflection;
+using System.Runtime.InteropServices;
+using System.Threading;
+
+namespace Grpc.Core.Internal
+{
+    /// <summary>
+    /// Overrides the content of default SSL roots.
+    /// </summary>
+    internal static class DefaultSslRootsOverride
+    {
+        const string RootsPemResourceName = "Grpc.Core.Resources.roots.pem";
+        static object staticLock = new object();
+
+        /// <summary>
+        /// Overrides C core's default roots with roots.pem loaded as embedded resource.
+        /// </summary>
+        public static void Override(NativeMethods native)
+        {
+            lock (staticLock)
+            {
+                var stream = Assembly.GetExecutingAssembly().GetManifestResourceStream(RootsPemResourceName);
+                if (stream == null)
+                {
+                    throw new IOException(string.Format("Error loading the embedded resource \"{0}\"", RootsPemResourceName));   
+                }
+                using (var streamReader = new StreamReader(stream))
+                {
+                    var pemRootCerts = streamReader.ReadToEnd();
+                    native.grpcsharp_override_default_ssl_roots(pemRootCerts);
+                }
+            }
+        }
+    }
+}

src/csharp/Grpc.Core/Internal/NativeExtension.cs

@@ -60,6 +60,8 @@ namespace Grpc.Core.Internal
             // to make sure we don't lose any logs.
             NativeLogRedirector.Redirect(this.nativeMethods);
 
+            DefaultSslRootsOverride.Override(this.nativeMethods);
+
             Logger.Debug("gRPC native library loaded successfully.");
         }
 

src/csharp/Grpc.Core/Internal/NativeMethods.cs

@@ -97,6 +97,7 @@ namespace Grpc.Core.Internal
         public readonly Delegates.grpcsharp_channel_args_set_integer_delegate grpcsharp_channel_args_set_integer;
         public readonly Delegates.grpcsharp_channel_args_destroy_delegate grpcsharp_channel_args_destroy;
 
+        public readonly Delegates.grpcsharp_override_default_ssl_roots grpcsharp_override_default_ssl_roots;
         public readonly Delegates.grpcsharp_ssl_credentials_create_delegate grpcsharp_ssl_credentials_create;
         public readonly Delegates.grpcsharp_composite_channel_credentials_create_delegate grpcsharp_composite_channel_credentials_create;
         public readonly Delegates.grpcsharp_channel_credentials_release_delegate grpcsharp_channel_credentials_release;
@@ -203,6 +204,7 @@ namespace Grpc.Core.Internal
                 this.grpcsharp_channel_args_set_integer = GetMethodDelegate<Delegates.grpcsharp_channel_args_set_integer_delegate>(library);
                 this.grpcsharp_channel_args_destroy = GetMethodDelegate<Delegates.grpcsharp_channel_args_destroy_delegate>(library);
 
+                this.grpcsharp_override_default_ssl_roots = GetMethodDelegate<Delegates.grpcsharp_override_default_ssl_roots>(library);
                 this.grpcsharp_ssl_credentials_create = GetMethodDelegate<Delegates.grpcsharp_ssl_credentials_create_delegate>(library);
                 this.grpcsharp_composite_channel_credentials_create = GetMethodDelegate<Delegates.grpcsharp_composite_channel_credentials_create_delegate>(library);
                 this.grpcsharp_channel_credentials_release = GetMethodDelegate<Delegates.grpcsharp_channel_credentials_release_delegate>(library);
@@ -306,6 +308,7 @@ namespace Grpc.Core.Internal
                 this.grpcsharp_channel_args_set_integer = PInvokeMethods.grpcsharp_channel_args_set_integer;
                 this.grpcsharp_channel_args_destroy = PInvokeMethods.grpcsharp_channel_args_destroy;
 
+                this.grpcsharp_override_default_ssl_roots = PInvokeMethods.grpcsharp_override_default_ssl_roots;
                 this.grpcsharp_ssl_credentials_create = PInvokeMethods.grpcsharp_ssl_credentials_create;
                 this.grpcsharp_composite_channel_credentials_create = PInvokeMethods.grpcsharp_composite_channel_credentials_create;
                 this.grpcsharp_channel_credentials_release = PInvokeMethods.grpcsharp_channel_credentials_release;
@@ -449,6 +452,7 @@ namespace Grpc.Core.Internal
             public delegate void grpcsharp_channel_args_set_integer_delegate(ChannelArgsSafeHandle args, UIntPtr index, string key, int value);
             public delegate void grpcsharp_channel_args_destroy_delegate(IntPtr args);
 
+            public delegate void grpcsharp_override_default_ssl_roots(string pemRootCerts);
             public delegate ChannelCredentialsSafeHandle grpcsharp_ssl_credentials_create_delegate(string pemRootCerts, string keyCertPairCertChain, string keyCertPairPrivateKey);
             public delegate ChannelCredentialsSafeHandle grpcsharp_composite_channel_credentials_create_delegate(ChannelCredentialsSafeHandle channelCreds, CallCredentialsSafeHandle callCreds);
             public delegate void grpcsharp_channel_credentials_release_delegate(IntPtr credentials);
@@ -657,6 +661,9 @@ namespace Grpc.Core.Internal
 
             // ChannelCredentialsSafeHandle
 
+            [DllImport("grpc_csharp_ext.dll", CharSet = CharSet.Ansi)]
+            public static extern void grpcsharp_override_default_ssl_roots(string pemRootCerts);
+
             [DllImport("grpc_csharp_ext.dll", CharSet = CharSet.Ansi)]
             public static extern ChannelCredentialsSafeHandle grpcsharp_ssl_credentials_create(string pemRootCerts, string keyCertPairCertChain, string keyCertPairPrivateKey);
 

src/csharp/ext/grpc_csharp_ext.c

@@ -835,6 +835,30 @@ grpcsharp_server_request_call(grpc_server *server, grpc_completion_queue *cq,
 
 /* Security */
 
+static char *default_pem_root_certs = NULL;
+
+static grpc_ssl_roots_override_result override_ssl_roots_handler(
+    char **pem_root_certs) {
+  if (!default_pem_root_certs) {
+    *pem_root_certs = NULL;
+    return GRPC_SSL_ROOTS_OVERRIDE_FAIL_PERMANENTLY;
+  }
+  *pem_root_certs = gpr_strdup(default_pem_root_certs);
+  return GRPC_SSL_ROOTS_OVERRIDE_OK;
+}
+
+GPR_EXPORT void GPR_CALLTYPE grpcsharp_override_default_ssl_roots(
+    const char *pem_root_certs) {
+  /*
+   * This currently wastes ~300kB of memory by keeping a copy of roots
+   * in a static variable, but for desktop/server use, the overhead
+   * is negligible. In the future, we might want to change the behavior
+   * for mobile (e.g. Xamarin).
+   */
+  default_pem_root_certs = gpr_strdup(pem_root_certs);
+  grpc_set_ssl_roots_override_callback(override_ssl_roots_handler);
+}
+
 GPR_EXPORT grpc_channel_credentials *GPR_CALLTYPE
 grpcsharp_ssl_credentials_create(const char *pem_root_certs,
                                  const char *key_cert_pair_cert_chain,
@@ -917,6 +941,7 @@ GPR_EXPORT grpc_call_credentials *GPR_CALLTYPE grpcsharp_composite_call_credenti
   return grpc_composite_call_credentials_create(creds1, creds2, NULL);
 }
 
+
 /* Metadata credentials plugin */
 
 GPR_EXPORT void GPR_CALLTYPE grpcsharp_metadata_credentials_notify_from_plugin(