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/*
*
* Copyright 2016 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.
*
*/
#include "test/cpp/util/cli_credentials.h"
#include "absl/flags/flag.h"
#include <grpc/slice.h>
#include <grpc/support/log.h>
#include <grpcpp/support/slice.h>
#include "src/core/lib/iomgr/load_file.h"
ABSL_RETIRED_FLAG(bool, enable_ssl, false,
"Replaced by --channel_creds_type=ssl.");
ABSL_RETIRED_FLAG(bool, use_auth, false,
"Replaced by --channel_creds_type=gdc.");
ABSL_RETIRED_FLAG(std::string, access_token, "",
"Replaced by --call_creds=access_token=<token>.");
ABSL_FLAG(
std::string, ssl_target, "",
"If not empty, treat the server host name as this for ssl/tls certificate "
"validation.");
ABSL_FLAG(
std::string, ssl_client_cert, "",
"If not empty, load this PEM formatted client certificate file. Requires "
"use of --ssl_client_key.");
ABSL_FLAG(std::string, ssl_client_key, "",
"If not empty, load this PEM formatted private key. Requires use of "
"--ssl_client_cert");
ABSL_FLAG(
std::string, local_connect_type, "local_tcp",
"The type of local connections for which local channel credentials will "
"be applied. Should be local_tcp or uds.");
ABSL_FLAG(
std::string, channel_creds_type, "",
"The channel creds type: insecure, ssl, gdc (Google Default Credentials), "
"alts, or local.");
ABSL_FLAG(
std::string, call_creds, "",
"Call credentials to use: none (default), or access_token=<token>. If "
"provided, the call creds are composited on top of channel creds.");
namespace grpc {
namespace testing {
namespace {
const char ACCESS_TOKEN_PREFIX[] = "access_token=";
constexpr int ACCESS_TOKEN_PREFIX_LEN =
sizeof(ACCESS_TOKEN_PREFIX) / sizeof(*ACCESS_TOKEN_PREFIX) - 1;
bool IsAccessToken(const std::string& auth) {
return auth.length() > ACCESS_TOKEN_PREFIX_LEN &&
auth.compare(0, ACCESS_TOKEN_PREFIX_LEN, ACCESS_TOKEN_PREFIX) == 0;
}
std::string AccessToken(const std::string& auth) {
if (!IsAccessToken(auth)) {
return "";
}
return std::string(auth, ACCESS_TOKEN_PREFIX_LEN);
}
} // namespace
std::string CliCredentials::GetDefaultChannelCredsType() const {
return "insecure";
}
std::string CliCredentials::GetDefaultCallCreds() const { return "none"; }
std::shared_ptr<grpc::ChannelCredentials>
CliCredentials::GetChannelCredentials() const {
if (absl::GetFlag(FLAGS_channel_creds_type) == "insecure") {
return grpc::InsecureChannelCredentials();
} else if (absl::GetFlag(FLAGS_channel_creds_type) == "ssl") {
grpc::SslCredentialsOptions ssl_creds_options;
// TODO(@Capstan): This won't affect Google Default Credentials using SSL.
if (!absl::GetFlag(FLAGS_ssl_client_cert).empty()) {
grpc_slice cert_slice = grpc_empty_slice();
GRPC_LOG_IF_ERROR(
"load_file",
grpc_load_file(absl::GetFlag(FLAGS_ssl_client_cert).c_str(), 1,
&cert_slice));
ssl_creds_options.pem_cert_chain =
grpc::StringFromCopiedSlice(cert_slice);
grpc_slice_unref(cert_slice);
}
if (!absl::GetFlag(FLAGS_ssl_client_key).empty()) {
grpc_slice key_slice = grpc_empty_slice();
GRPC_LOG_IF_ERROR(
"load_file",
grpc_load_file(absl::GetFlag(FLAGS_ssl_client_key).c_str(), 1,
&key_slice));
ssl_creds_options.pem_private_key =
grpc::StringFromCopiedSlice(key_slice);
grpc_slice_unref(key_slice);
}
return grpc::SslCredentials(ssl_creds_options);
} else if (absl::GetFlag(FLAGS_channel_creds_type) == "gdc") {
return grpc::GoogleDefaultCredentials();
} else if (absl::GetFlag(FLAGS_channel_creds_type) == "alts") {
return grpc::experimental::AltsCredentials(
grpc::experimental::AltsCredentialsOptions());
} else if (absl::GetFlag(FLAGS_channel_creds_type) == "local") {
if (absl::GetFlag(FLAGS_local_connect_type) == "local_tcp") {
return grpc::experimental::LocalCredentials(LOCAL_TCP);
} else if (absl::GetFlag(FLAGS_local_connect_type) == "uds") {
return grpc::experimental::LocalCredentials(UDS);
} else {
fprintf(stderr,
"--local_connect_type=%s invalid; must be local_tcp or uds.\n",
absl::GetFlag(FLAGS_local_connect_type).c_str());
}
}
fprintf(stderr,
"--channel_creds_type=%s invalid; must be insecure, ssl, gdc, "
"alts, or local.\n",
absl::GetFlag(FLAGS_channel_creds_type).c_str());
return std::shared_ptr<grpc::ChannelCredentials>();
}
std::shared_ptr<grpc::CallCredentials> CliCredentials::GetCallCredentials()
const {
if (IsAccessToken(absl::GetFlag(FLAGS_call_creds))) {
return grpc::AccessTokenCredentials(
AccessToken(absl::GetFlag(FLAGS_call_creds)));
}
if (absl::GetFlag(FLAGS_call_creds) == "none") {
// Nothing to do; creds, if any, are baked into the channel.
return std::shared_ptr<grpc::CallCredentials>();
}
fprintf(stderr,
"--call_creds=%s invalid; must be none "
"or access_token=<token>.\n",
absl::GetFlag(FLAGS_call_creds).c_str());
return std::shared_ptr<grpc::CallCredentials>();
}
std::shared_ptr<grpc::ChannelCredentials> CliCredentials::GetCredentials()
const {
if (absl::GetFlag(FLAGS_call_creds).empty()) {
absl::SetFlag(&FLAGS_call_creds, GetDefaultCallCreds());
}
if (absl::GetFlag(FLAGS_channel_creds_type).empty()) {
absl::SetFlag(&FLAGS_channel_creds_type, GetDefaultChannelCredsType());
}
std::shared_ptr<grpc::ChannelCredentials> channel_creds =
GetChannelCredentials();
// Composite any call-type credentials on top of the base channel.
std::shared_ptr<grpc::CallCredentials> call_creds = GetCallCredentials();
return (channel_creds == nullptr || call_creds == nullptr)
? channel_creds
: grpc::CompositeChannelCredentials(channel_creds, call_creds);
}
std::string CliCredentials::GetCredentialUsage() const {
return " --ssl_target ; Set server host for ssl validation\n"
" --ssl_client_cert ; Client cert for ssl\n"
" --ssl_client_key ; Client private key for ssl\n"
" --local_connect_type ; Set to local_tcp or uds\n"
" --channel_creds_type ; Set to insecure, ssl, gdc, alts, or "
"local\n"
" --call_creds ; Set to none, or"
" access_token=<token>\n";
}
std::string CliCredentials::GetSslTargetNameOverride() const {
bool use_ssl = absl::GetFlag(FLAGS_channel_creds_type) == "ssl" ||
absl::GetFlag(FLAGS_channel_creds_type) == "gdc";
return use_ssl ? absl::GetFlag(FLAGS_ssl_target) : "";
}
} // namespace testing
} // namespace grpc
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