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

#region Copyright notice and license
// Copyright 2015, Google Inc.
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// 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.
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#endregion
using System;
using System.Runtime.InteropServices;
using System.Threading;
using System.Threading.Tasks;
using Grpc.Core.Utils;

namespace Grpc.Core.Internal
{
    /// <summary>
    /// grpc_server_credentials from <grpc/grpc_security.h>
    /// </summary>
    internal class ServerCredentialsSafeHandle : SafeHandleZeroIsInvalid
    {
        [DllImport("grpc_csharp_ext.dll", CharSet = CharSet.Ansi)]
        static extern ServerCredentialsSafeHandle grpcsharp_ssl_server_credentials_create(string pemRootCerts, string[] keyCertPairCertChainArray, string[] keyCertPairPrivateKeyArray, UIntPtr numKeyCertPairs);

        [DllImport("grpc_csharp_ext.dll")]
        static extern void grpcsharp_server_credentials_release(IntPtr credentials);

        private ServerCredentialsSafeHandle()
        {
        }

        public static ServerCredentialsSafeHandle CreateSslCredentials(string[] keyCertPairCertChainArray, string[] keyCertPairPrivateKeyArray)
        {
            Preconditions.CheckArgument(keyCertPairCertChainArray.Length == keyCertPairPrivateKeyArray.Length);
            return grpcsharp_ssl_server_credentials_create(null,
                                                           keyCertPairCertChainArray, keyCertPairPrivateKeyArray,
                                                           new UIntPtr((ulong)keyCertPairCertChainArray.Length));
        }

        protected override bool ReleaseHandle()
        {
            grpcsharp_server_credentials_release(handle);
            return true;
        }
    }
}