| #region Copyright notice and license |
| |
| // Copyright 2019 The 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.Collections.Generic; |
| using Grpc.Core.Utils; |
| |
| namespace Grpc.Core.Internal |
| { |
| /// <summary> |
| /// Creates native call credential objects from instances of <c>CallCredentials</c>. |
| /// </summary> |
| internal class DefaultCallCredentialsConfigurator : CallCredentialsConfiguratorBase |
| { |
| CallCredentialsSafeHandle nativeCredentials; |
| |
| public CallCredentialsSafeHandle NativeCredentials => nativeCredentials; |
| |
| public override void SetAsyncAuthInterceptorCredentials(object state, AsyncAuthInterceptor interceptor) |
| { |
| GrpcPreconditions.CheckState(nativeCredentials == null); |
| |
| var plugin = new NativeMetadataCredentialsPlugin(interceptor); |
| nativeCredentials = plugin.Credentials; |
| } |
| |
| public override void SetCompositeCredentials(object state, IReadOnlyList<CallCredentials> credentials) |
| { |
| GrpcPreconditions.CheckState(nativeCredentials == null); |
| |
| GrpcPreconditions.CheckArgument(credentials.Count >= 2); |
| nativeCredentials = CompositeToNativeRecursive(credentials, 0); |
| } |
| |
| // Recursive descent makes managing lifetime of intermediate CredentialSafeHandle instances easier. |
| // In practice, we won't usually see composites from more than two credentials anyway. |
| private CallCredentialsSafeHandle CompositeToNativeRecursive(IReadOnlyList<CallCredentials> credentials, int startIndex) |
| { |
| if (startIndex == credentials.Count - 1) |
| { |
| return credentials[startIndex].ToNativeCredentials(); |
| } |
| |
| using (var cred1 = credentials[startIndex].ToNativeCredentials()) |
| using (var cred2 = CompositeToNativeRecursive(credentials, startIndex + 1)) |
| { |
| var nativeComposite = CallCredentialsSafeHandle.CreateComposite(cred1, cred2); |
| if (nativeComposite.IsInvalid) |
| { |
| throw new ArgumentException("Error creating native composite credentials. Likely, this is because you are trying to compose incompatible credentials."); |
| } |
| return nativeComposite; |
| } |
| } |
| } |
| |
| internal static class CallCredentialsExtensions |
| { |
| /// <summary> |
| /// Creates native object for the credentials. |
| /// </summary> |
| /// <returns>The native credentials.</returns> |
| public static CallCredentialsSafeHandle ToNativeCredentials(this CallCredentials credentials) |
| { |
| var configurator = new DefaultCallCredentialsConfigurator(); |
| credentials.InternalPopulateConfiguration(configurator, credentials); |
| return configurator.NativeCredentials; |
| } |
| } |
| } |