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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 <gflags/gflags.h>
#include <grpc/slice.h>
#include <grpc/support/log.h>
#include <grpcpp/impl/codegen/slice.h>
#include "src/core/lib/iomgr/load_file.h"
DEFINE_bool(
enable_ssl, false,
"Whether to use ssl/tls. Deprecated. Use --channel_creds_type=ssl.");
DEFINE_bool(use_auth, false,
"Whether to create default google credentials. Deprecated. Use "
"--channel_creds_type=gdc.");
DEFINE_string(
access_token, "",
"The access token that will be sent to the server to authenticate RPCs. "
"Deprecated. Use --call_creds=access_token=<token>.");
DEFINE_string(
ssl_target, "",
"If not empty, treat the server host name as this for ssl/tls certificate "
"validation.");
DEFINE_string(
ssl_client_cert, "",
"If not empty, load this PEM formatted client certificate file. Requires "
"use of --ssl_client_key.");
DEFINE_string(
ssl_client_key, "",
"If not empty, load this PEM formatted private key. Requires use of "
"--ssl_client_cert");
DEFINE_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.");
DEFINE_string(
channel_creds_type, "",
"The channel creds type: insecure, ssl, gdc (Google Default Credentials), "
"alts, or local.");
DEFINE_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 TString& auth) {
return auth.length() > ACCESS_TOKEN_PREFIX_LEN &&
auth.compare(0, ACCESS_TOKEN_PREFIX_LEN, ACCESS_TOKEN_PREFIX) == 0;
}
TString AccessToken(const TString& auth) {
if (!IsAccessToken(auth)) {
return "";
}
return TString(auth.c_str(), ACCESS_TOKEN_PREFIX_LEN);
}
} // namespace
TString CliCredentials::GetDefaultChannelCredsType() const {
// Compatibility logic for --enable_ssl.
if (FLAGS_enable_ssl) {
fprintf(stderr,
"warning: --enable_ssl is deprecated. Use "
"--channel_creds_type=ssl.\n");
return "ssl";
}
// Compatibility logic for --use_auth.
if (FLAGS_access_token.empty() && FLAGS_use_auth) {
fprintf(stderr,
"warning: --use_auth is deprecated. Use "
"--channel_creds_type=gdc.\n");
return "gdc";
}
return "insecure";
}
TString CliCredentials::GetDefaultCallCreds() const {
if (!FLAGS_access_token.empty()) {
fprintf(stderr,
"warning: --access_token is deprecated. Use "
"--call_creds=access_token=<token>.\n");
return TString("access_token=") + FLAGS_access_token;
}
return "none";
}
std::shared_ptr<grpc::ChannelCredentials>
CliCredentials::GetChannelCredentials() const {
if (FLAGS_channel_creds_type.compare("insecure") == 0) {
return grpc::InsecureChannelCredentials();
} else if (FLAGS_channel_creds_type.compare("ssl") == 0) {
grpc::SslCredentialsOptions ssl_creds_options;
// TODO(@Capstan): This won't affect Google Default Credentials using SSL.
if (!FLAGS_ssl_client_cert.empty()) {
grpc_slice cert_slice = grpc_empty_slice();
GRPC_LOG_IF_ERROR(
"load_file",
grpc_load_file(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 (!FLAGS_ssl_client_key.empty()) {
grpc_slice key_slice = grpc_empty_slice();
GRPC_LOG_IF_ERROR(
"load_file",
grpc_load_file(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 (FLAGS_channel_creds_type.compare("gdc") == 0) {
return grpc::GoogleDefaultCredentials();
} else if (FLAGS_channel_creds_type.compare("alts") == 0) {
return grpc::experimental::AltsCredentials(
grpc::experimental::AltsCredentialsOptions());
} else if (FLAGS_channel_creds_type.compare("local") == 0) {
if (FLAGS_local_connect_type.compare("local_tcp") == 0) {
return grpc::experimental::LocalCredentials(LOCAL_TCP);
} else if (FLAGS_local_connect_type.compare("uds") == 0) {
return grpc::experimental::LocalCredentials(UDS);
} else {
fprintf(stderr,
"--local_connect_type=%s invalid; must be local_tcp or uds.\n",
FLAGS_local_connect_type.c_str());
}
}
fprintf(stderr,
"--channel_creds_type=%s invalid; must be insecure, ssl, gdc, "
"alts, or local.\n",
FLAGS_channel_creds_type.c_str());
return std::shared_ptr<grpc::ChannelCredentials>();
}
std::shared_ptr<grpc::CallCredentials> CliCredentials::GetCallCredentials()
const {
if (IsAccessToken(FLAGS_call_creds.c_str())) {
return grpc::AccessTokenCredentials(AccessToken(FLAGS_call_creds.c_str()));
}
if (FLAGS_call_creds.compare("none") == 0) {
// 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",
FLAGS_call_creds.c_str());
return std::shared_ptr<grpc::CallCredentials>();
}
std::shared_ptr<grpc::ChannelCredentials> CliCredentials::GetCredentials()
const {
if (FLAGS_call_creds.empty()) {
FLAGS_call_creds = GetDefaultCallCreds();
} else if (!FLAGS_access_token.empty() && !IsAccessToken(FLAGS_call_creds.c_str())) {
fprintf(stderr,
"warning: ignoring --access_token because --call_creds "
"already set to %s.\n",
FLAGS_call_creds.c_str());
}
if (FLAGS_channel_creds_type.empty()) {
FLAGS_channel_creds_type = GetDefaultChannelCredsType();
} else if (FLAGS_enable_ssl && FLAGS_channel_creds_type.compare("ssl") != 0) {
fprintf(stderr,
"warning: ignoring --enable_ssl because "
"--channel_creds_type already set to %s.\n",
FLAGS_channel_creds_type.c_str());
} else if (FLAGS_use_auth && FLAGS_channel_creds_type.compare("gdc") != 0) {
fprintf(stderr,
"warning: ignoring --use_auth because "
"--channel_creds_type already set to %s.\n",
FLAGS_channel_creds_type.c_str());
}
// Legacy transport upgrade logic for insecure requests.
if (IsAccessToken(FLAGS_call_creds.c_str()) &&
FLAGS_channel_creds_type.compare("insecure") == 0) {
fprintf(stderr,
"warning: --channel_creds_type=insecure upgraded to ssl because "
"an access token was provided.\n");
FLAGS_channel_creds_type = "ssl";
}
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);
}
const TString CliCredentials::GetCredentialUsage() const {
return " --enable_ssl ; Set whether to use ssl "
"(deprecated)\n"
" --use_auth ; Set whether to create default google"
" credentials\n"
" ; (deprecated)\n"
" --access_token ; Set the access token in metadata,"
" overrides --use_auth\n"
" ; (deprecated)\n"
" --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";
}
const TString CliCredentials::GetSslTargetNameOverride() const {
bool use_ssl = FLAGS_channel_creds_type.compare("ssl") == 0 ||
FLAGS_channel_creds_type.compare("gdc") == 0;
return use_ssl ? FLAGS_ssl_target : "";
}
} // namespace testing
} // namespace grpc
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