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

#region Copyright notice and license

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#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 = typeof(DefaultSslRootsOverride).GetTypeInfo().Assembly.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);
                }
            }
        }
    }
}