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/*
*
* 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.
*
*/
#include <grpc/support/log.h>
#include <grpc++/channel.h>
#include <grpc++/impl/grpc_library.h>
#include <grpc++/support/channel_arguments.h>
#include "src/cpp/client/create_channel_internal.h"
#include "src/cpp/client/secure_credentials.h"
namespace grpc {
std::shared_ptr<grpc::Channel> SecureChannelCredentials::CreateChannel(
const string& target, const grpc::ChannelArguments& args) {
grpc_channel_args channel_args;
args.SetChannelArgs(&channel_args);
return CreateChannelInternal(
args.GetSslTargetNameOverride(),
grpc_secure_channel_create(c_creds_, target.c_str(), &channel_args,
nullptr));
}
bool SecureCallCredentials::ApplyToCall(grpc_call* call) {
return grpc_call_set_credentials(call, c_creds_) == GRPC_CALL_OK;
}
namespace {
std::shared_ptr<ChannelCredentials> WrapChannelCredentials(
grpc_channel_credentials* creds) {
return creds == nullptr ? nullptr : std::shared_ptr<ChannelCredentials>(
new SecureChannelCredentials(creds));
}
std::shared_ptr<CallCredentials> WrapCallCredentials(
grpc_call_credentials* creds) {
return creds == nullptr ? nullptr : std::shared_ptr<CallCredentials>(
new SecureCallCredentials(creds));
}
} // namespace
std::shared_ptr<ChannelCredentials> GoogleDefaultCredentials() {
GrpcLibrary init; // To call grpc_init().
return WrapChannelCredentials(grpc_google_default_credentials_create());
}
// Builds SSL Credentials given SSL specific options
std::shared_ptr<ChannelCredentials> SslCredentials(
const SslCredentialsOptions& options) {
GrpcLibrary init; // To call grpc_init().
grpc_ssl_pem_key_cert_pair pem_key_cert_pair = {
options.pem_private_key.c_str(), options.pem_cert_chain.c_str()};
grpc_channel_credentials* c_creds = grpc_ssl_credentials_create(
options.pem_root_certs.empty() ? nullptr : options.pem_root_certs.c_str(),
options.pem_private_key.empty() ? nullptr : &pem_key_cert_pair, nullptr);
return WrapChannelCredentials(c_creds);
}
// Builds credentials for use when running in GCE
std::shared_ptr<CallCredentials> GoogleComputeEngineCredentials() {
GrpcLibrary init; // To call grpc_init().
return WrapCallCredentials(
grpc_google_compute_engine_credentials_create(nullptr));
}
// Builds JWT credentials.
std::shared_ptr<CallCredentials> ServiceAccountJWTAccessCredentials(
const grpc::string& json_key, long token_lifetime_seconds) {
GrpcLibrary init; // To call grpc_init().
if (token_lifetime_seconds <= 0) {
gpr_log(GPR_ERROR,
"Trying to create JWTCredentials with non-positive lifetime");
return WrapCallCredentials(nullptr);
}
gpr_timespec lifetime =
gpr_time_from_seconds(token_lifetime_seconds, GPR_TIMESPAN);
return WrapCallCredentials(grpc_service_account_jwt_access_credentials_create(
json_key.c_str(), lifetime, nullptr));
}
// Builds refresh token credentials.
std::shared_ptr<CallCredentials> GoogleRefreshTokenCredentials(
const grpc::string& json_refresh_token) {
GrpcLibrary init; // To call grpc_init().
return WrapCallCredentials(grpc_google_refresh_token_credentials_create(
json_refresh_token.c_str(), nullptr));
}
// Builds access token credentials.
std::shared_ptr<CallCredentials> AccessTokenCredentials(
const grpc::string& access_token) {
GrpcLibrary init; // To call grpc_init().
return WrapCallCredentials(
grpc_access_token_credentials_create(access_token.c_str(), nullptr));
}
// Builds IAM credentials.
std::shared_ptr<CallCredentials> GoogleIAMCredentials(
const grpc::string& authorization_token,
const grpc::string& authority_selector) {
GrpcLibrary init; // To call grpc_init().
return WrapCallCredentials(grpc_google_iam_credentials_create(
authorization_token.c_str(), authority_selector.c_str(), nullptr));
}
// Combines one channel credentials and one call credentials into a channel
// composite credentials.
std::shared_ptr<ChannelCredentials> CompositeChannelCredentials(
const std::shared_ptr<ChannelCredentials>& channel_creds,
const std::shared_ptr<CallCredentials>& call_creds) {
// Note that we are not saving shared_ptrs to the two credentials passed in
// here. This is OK because the underlying C objects (i.e., channel_creds and
// call_creds) into grpc_composite_credentials_create will see their refcounts
// incremented.
SecureChannelCredentials* s_channel_creds =
channel_creds->AsSecureCredentials();
SecureCallCredentials* s_call_creds = call_creds->AsSecureCredentials();
if (s_channel_creds && s_call_creds) {
return WrapChannelCredentials(grpc_composite_channel_credentials_create(
s_channel_creds->GetRawCreds(), s_call_creds->GetRawCreds(), nullptr));
}
return nullptr;
}
void MetadataCredentialsPluginWrapper::Destroy(void* wrapper) {
if (wrapper == nullptr) return;
MetadataCredentialsPluginWrapper* w =
reinterpret_cast<MetadataCredentialsPluginWrapper*>(wrapper);
delete w;
}
void MetadataCredentialsPluginWrapper::GetMetadata(
void* wrapper, const char* service_url,
grpc_credentials_plugin_metadata_cb cb, void* user_data) {
GPR_ASSERT(wrapper);
MetadataCredentialsPluginWrapper* w =
reinterpret_cast<MetadataCredentialsPluginWrapper*>(wrapper);
if (!w->plugin_) {
cb(user_data, NULL, 0, GRPC_STATUS_OK, NULL);
return;
}
if (w->plugin_->IsBlocking()) {
w->thread_pool_->Add(
std::bind(&MetadataCredentialsPluginWrapper::InvokePlugin, w,
service_url, cb, user_data));
} else {
w->InvokePlugin(service_url, cb, user_data);
}
}
void MetadataCredentialsPluginWrapper::InvokePlugin(
const char* service_url, grpc_credentials_plugin_metadata_cb cb,
void* user_data) {
std::multimap<grpc::string, grpc::string> metadata;
Status status = plugin_->GetMetadata(service_url, &metadata);
std::vector<grpc_metadata> md;
for (auto it = metadata.begin(); it != metadata.end(); ++it) {
grpc_metadata md_entry;
md_entry.key = it->first.c_str();
md_entry.value = it->second.data();
md_entry.value_length = it->second.size();
md_entry.flags = 0;
md.push_back(md_entry);
}
cb(user_data, md.empty() ? nullptr : &md[0], md.size(),
static_cast<grpc_status_code>(status.error_code()),
status.error_message().c_str());
}
MetadataCredentialsPluginWrapper::MetadataCredentialsPluginWrapper(
std::unique_ptr<MetadataCredentialsPlugin> plugin)
: thread_pool_(CreateDefaultThreadPool()), plugin_(std::move(plugin)) {}
std::shared_ptr<CallCredentials> MetadataCredentialsFromPlugin(
std::unique_ptr<MetadataCredentialsPlugin> plugin) {
GrpcLibrary init; // To call grpc_init().
MetadataCredentialsPluginWrapper* wrapper =
new MetadataCredentialsPluginWrapper(std::move(plugin));
grpc_metadata_credentials_plugin c_plugin = {
MetadataCredentialsPluginWrapper::GetMetadata,
MetadataCredentialsPluginWrapper::Destroy, wrapper};
return WrapCallCredentials(
grpc_metadata_credentials_create_from_plugin(c_plugin, nullptr));
}
} // namespace grpc
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