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// Copyright 2017 The Bazel Authors. All rights reserved.
//
// 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 com.google.devtools.build.lib.remote;
import com.google.auth.oauth2.GoogleCredentials;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.ImmutableList;
import com.google.devtools.build.lib.authandtls.AuthAndTLSOptions;
import com.google.devtools.build.lib.concurrent.ThreadSafety.ThreadSafe;
import io.grpc.CallCredentials;
import io.grpc.auth.MoreCallCredentials;
import io.grpc.netty.GrpcSslContexts;
import io.netty.handler.ssl.SslContext;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import javax.annotation.Nullable;
import javax.net.ssl.SSLException;
/** Instantiate all authentication helpers from build options. */
@ThreadSafe
public final class ChannelOptions {
private final int maxMessageSize;
private final boolean tlsEnabled;
private final SslContext sslContext;
private final String tlsAuthorityOverride;
private final CallCredentials credentials;
private static final int CHUNK_MESSAGE_OVERHEAD = 1024;
private ChannelOptions(
boolean tlsEnabled,
SslContext sslContext,
String tlsAuthorityOverride,
CallCredentials credentials,
int maxMessageSize) {
this.tlsEnabled = tlsEnabled;
this.sslContext = sslContext;
this.tlsAuthorityOverride = tlsAuthorityOverride;
this.credentials = credentials;
this.maxMessageSize = maxMessageSize;
}
public boolean tlsEnabled() {
return tlsEnabled;
}
public CallCredentials getCallCredentials() {
return credentials;
}
public String getTlsAuthorityOverride() {
return tlsAuthorityOverride;
}
public SslContext getSslContext() {
return sslContext;
}
public int maxMessageSize() {
return maxMessageSize;
}
public static ChannelOptions create(AuthAndTLSOptions options, int grpcMaxChunkSizeBytes) {
try {
return create(
options,
grpcMaxChunkSizeBytes,
options.authCredentials != null
? new FileInputStream(options.authCredentials)
: null);
} catch (IOException e) {
throw new IllegalArgumentException(
"Failed initializing auth credentials for remote cache/execution " + e);
}
}
@VisibleForTesting
public static ChannelOptions create(AuthAndTLSOptions options, int grpcMaxChunkSizeBytes,
@Nullable InputStream credentialsInputStream) {
boolean tlsEnabled = options.tlsEnabled;
SslContext sslContext = null;
String tlsAuthorityOverride = options.tlsAuthorityOverride;
CallCredentials credentials = null;
if (options.tlsEnabled && options.tlsCertificate != null) {
try {
sslContext =
GrpcSslContexts.forClient().trustManager(new File(options.tlsCertificate)).build();
} catch (SSLException e) {
throw new IllegalArgumentException(
"SSL error initializing cert " + options.tlsCertificate + " : " + e);
}
}
if (options.authEnabled) {
try {
GoogleCredentials creds =
credentialsInputStream == null
? GoogleCredentials.getApplicationDefault()
: GoogleCredentials.fromStream(credentialsInputStream);
if (options.authScope != null) {
creds = creds.createScoped(ImmutableList.of(options.authScope));
}
credentials = MoreCallCredentials.from(creds);
} catch (IOException e) {
throw new IllegalArgumentException(
"Failed initializing auth credentials for remote cache/execution " + e);
}
}
final int maxMessageSize =
Math.max(
4 * 1024 * 1024 /* GrpcUtil.DEFAULT_MAX_MESSAGE_SIZE */,
grpcMaxChunkSizeBytes + CHUNK_MESSAGE_OVERHEAD);
return new ChannelOptions(
tlsEnabled, sslContext, tlsAuthorityOverride, credentials, maxMessageSize);
}
}
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