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#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.Threading;
using System.Threading.Tasks;
using Google.Apis.Auth.OAuth2;
using Grpc.Core;
using Grpc.Core.Utils;
namespace Grpc.Auth
{
/// <summary>
/// Factory/extension methods to create instances of <see cref="ChannelCredentials"/> and <see cref="CallCredentials"/> classes
/// based on credential objects originating from Google auth library.
/// </summary>
public static class GoogleGrpcCredentials
{
/// <summary>
/// Retrieves an instance of Google's Application Default Credentials using
/// <c>GoogleCredential.GetApplicationDefaultAsync()</c> and converts them
/// into a gRPC <see cref="ChannelCredentials"/> that use the default SSL credentials.
/// </summary>
/// <returns>The <c>ChannelCredentials</c> instance.</returns>
public static async Task<ChannelCredentials> GetApplicationDefaultAsync()
{
var googleCredential = await GoogleCredential.GetApplicationDefaultAsync().ConfigureAwait(false);
return googleCredential.ToChannelCredentials();
}
/// <summary>
/// Creates an instance of <see cref="CallCredentials"/> that will use given access token to authenticate
/// with a gRPC service.
/// </summary>
/// <param name="accessToken">OAuth2 access token.</param>
/// /// <returns>The <c>MetadataCredentials</c> instance.</returns>
public static CallCredentials FromAccessToken(string accessToken)
{
return CallCredentials.FromInterceptor(GoogleAuthInterceptors.FromAccessToken(accessToken));
}
/// <summary>
/// Converts a <c>ITokenAccess</c> (e.g. <c>GoogleCredential</c>) object
/// into a gRPC <see cref="CallCredentials"/> object.
/// </summary>
/// <param name="credential">The credential to use to obtain access tokens.</param>
/// <returns>The <c>CallCredentials</c> instance.</returns>
public static CallCredentials ToCallCredentials(this ITokenAccess credential)
{
return CallCredentials.FromInterceptor(GoogleAuthInterceptors.FromCredential(credential));
}
/// <summary>
/// Converts a <c>ITokenAccess</c> (e.g. <c>GoogleCredential</c>) object
/// into a gRPC <see cref="ChannelCredentials"/> object.
/// Default SSL credentials are used.
/// </summary>
/// <param name="googleCredential">The credential to use to obtain access tokens.</param>
/// <returns>>The <c>ChannelCredentials</c> instance.</returns>
public static ChannelCredentials ToChannelCredentials(this ITokenAccess googleCredential)
{
return ChannelCredentials.Create(new SslCredentials(), googleCredential.ToCallCredentials());
}
}
}
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