Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
alts: Expose ChannelCredentials for the various negotiators
AltsChannelBuilder could be improved a bit more by removing the call to InternalNettyChannelBuilder.setProtocolNegotiatorFactory. However, to do that cleanest would require reworking how port is plumbed in NettyChannelBuilder and potentially AbstractManagedChannelImplBuilder to move getDefaultPort() to ProtocolNegotiator from ClientFactory. Saving that for another day.
- Loading branch information
Showing
12 changed files
with
394 additions
and
245 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
158 changes: 158 additions & 0 deletions
158
alts/src/main/java/io/grpc/alts/AltsChannelCredentials.java
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,158 @@ | ||
| /* | ||
| * Copyright 2020 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. | ||
| */ | ||
|
|
||
| package io.grpc.alts; | ||
|
|
||
| import com.google.common.collect.ImmutableList; | ||
| import io.grpc.Channel; | ||
| import io.grpc.ChannelCredentials; | ||
| import io.grpc.ExperimentalApi; | ||
| import io.grpc.Status; | ||
| import io.grpc.alts.internal.AltsProtocolNegotiator.ClientAltsProtocolNegotiatorFactory; | ||
| import io.grpc.internal.ObjectPool; | ||
| import io.grpc.internal.SharedResourcePool; | ||
| import io.grpc.netty.GrpcHttp2ConnectionHandler; | ||
| import io.grpc.netty.InternalNettyChannelCredentials; | ||
| import io.grpc.netty.InternalProtocolNegotiator; | ||
| import io.grpc.netty.InternalProtocolNegotiator.ProtocolNegotiator; | ||
| import io.netty.channel.ChannelHandler; | ||
| import io.netty.channel.ChannelHandlerAdapter; | ||
| import io.netty.channel.ChannelHandlerContext; | ||
| import io.netty.util.AsciiString; | ||
| import java.util.logging.Level; | ||
| import java.util.logging.Logger; | ||
|
|
||
| /** | ||
| * Provides secure and authenticated commmunication between two cloud VMs using ALTS. | ||
| */ | ||
| @ExperimentalApi("https://github.com/grpc/grpc-java/issues/4151") | ||
| public final class AltsChannelCredentials { | ||
| private static final Logger logger = Logger.getLogger(AltsChannelCredentials.class.getName()); | ||
|
|
||
| private AltsChannelCredentials() {} | ||
|
|
||
| public static ChannelCredentials create() { | ||
| return newBuilder().build(); | ||
| } | ||
|
|
||
| public static Builder newBuilder() { | ||
| return new Builder(); | ||
| } | ||
|
|
||
| public static final class Builder { | ||
| private final ImmutableList.Builder<String> targetServiceAccountsBuilder = | ||
| ImmutableList.builder(); | ||
| private ObjectPool<Channel> handshakerChannelPool = | ||
| SharedResourcePool.forResource(HandshakerServiceChannel.SHARED_HANDSHAKER_CHANNEL); | ||
| private boolean enableUntrustedAlts; | ||
|
|
||
| /** | ||
| * Adds an expected target service accounts. One of the added service accounts should match peer | ||
| * service account in the handshaker result. Otherwise, the handshake fails. | ||
| */ | ||
| public Builder addTargetServiceAccount(String targetServiceAccount) { | ||
| targetServiceAccountsBuilder.add(targetServiceAccount); | ||
| return this; | ||
| } | ||
|
|
||
| /** | ||
| * Enables untrusted ALTS for testing. If this function is called, we will not check whether | ||
| * ALTS is running on Google Cloud Platform. | ||
| */ | ||
| public Builder enableUntrustedAltsForTesting() { | ||
| enableUntrustedAlts = true; | ||
| return this; | ||
| } | ||
|
|
||
| /** Sets a new handshaker service address for testing. */ | ||
| public Builder setHandshakerAddressForTesting(String handshakerAddress) { | ||
| // Instead of using the default shared channel to the handshaker service, create a separate | ||
| // resource to the test address. | ||
| handshakerChannelPool = | ||
| SharedResourcePool.forResource( | ||
| HandshakerServiceChannel.getHandshakerChannelForTesting(handshakerAddress)); | ||
| return this; | ||
| } | ||
|
|
||
| public ChannelCredentials build() { | ||
| return InternalNettyChannelCredentials.create(buildProtocolNegotiatorFactory()); | ||
| } | ||
|
|
||
| InternalProtocolNegotiator.ClientFactory buildProtocolNegotiatorFactory() { | ||
| if (!CheckGcpEnvironment.isOnGcp()) { | ||
| if (enableUntrustedAlts) { | ||
| logger.log( | ||
| Level.WARNING, | ||
| "Untrusted ALTS mode is enabled and we cannot guarantee the trustworthiness of the " | ||
| + "ALTS handshaker service"); | ||
| } else { | ||
| Status status = Status.INTERNAL.withDescription( | ||
| "ALTS is only allowed to run on Google Cloud Platform"); | ||
| return new FailingProtocolNegotiatorFactory(status); | ||
| } | ||
| } | ||
|
|
||
| return new ClientAltsProtocolNegotiatorFactory( | ||
| targetServiceAccountsBuilder.build(), handshakerChannelPool); | ||
| } | ||
| } | ||
|
|
||
| private static final class FailingProtocolNegotiatorFactory | ||
| implements InternalProtocolNegotiator.ClientFactory { | ||
| private final Status status; | ||
|
|
||
| public FailingProtocolNegotiatorFactory(Status status) { | ||
| this.status = status; | ||
| } | ||
|
|
||
| @Override | ||
| public ProtocolNegotiator newNegotiator() { | ||
| return new FailingProtocolNegotiator(status); | ||
| } | ||
|
|
||
| @Override | ||
| public int getDefaultPort() { | ||
| return 443; | ||
| } | ||
| } | ||
|
|
||
| private static final AsciiString SCHEME = AsciiString.of("https"); | ||
|
|
||
| private static final class FailingProtocolNegotiator implements ProtocolNegotiator { | ||
| private final Status status; | ||
|
|
||
| public FailingProtocolNegotiator(Status status) { | ||
| this.status = status; | ||
| } | ||
|
|
||
| @Override | ||
| public AsciiString scheme() { | ||
| return SCHEME; | ||
| } | ||
|
|
||
| @Override | ||
| public ChannelHandler newHandler(GrpcHttp2ConnectionHandler grpcHandler) { | ||
| return new ChannelHandlerAdapter() { | ||
| @Override public void handlerAdded(ChannelHandlerContext ctx) { | ||
| ctx.fireExceptionCaught(status.asRuntimeException()); | ||
| } | ||
| }; | ||
| } | ||
|
|
||
| @Override | ||
| public void close() {} | ||
| } | ||
| } |
47 changes: 0 additions & 47 deletions
47
alts/src/main/java/io/grpc/alts/CallCredentialsInterceptor.java
This file was deleted.
Oops, something went wrong.
Oops, something went wrong.