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#region Copyright notice and license
// Copyright 2015 gRPC authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#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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