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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "google_apis/google_api_keys.h"
// If you add more includes to this list, you also need to add them to
// google_api_keys_unittest.cc.
#include "base/command_line.h"
#include "base/environment.h"
#include "base/lazy_instance.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/strings/stringize_macros.h"
#if defined(GOOGLE_CHROME_BUILD) || defined(USE_OFFICIAL_GOOGLE_API_KEYS)
#include "google_apis/internal/google_chrome_api_keys.h"
#endif
// TODO(joi): Can we enable this warning without having it treated as
// an error? We don't want to fail builds, just warn, but all warnings
// from the preprocessor are currently treated as errors, at least in
// Linux builds.
#if 0
#if !defined(GOOGLE_API_KEY) && ( \
(!defined(GOOGLE_DEFAULT_CLIENT_ID) && \
!defined(GOOGLE_DEFAULT_CLIENT_SECRET)) \
|| \
(!defined(GOOGLE_CLIENT_ID_MAIN) && \
!defined(GOOGLE_CLIENT_SECRET_MAIN)))
#warning You have not specified API keys; some features may not work.
#warning See www.chromium.org/developers/how-tos/api-keys for details.
#endif // (API keys unset)
#endif // 0
// Used to indicate an unset key/id/secret. This works better with
// various unit tests than leaving the token empty.
#define DUMMY_API_TOKEN "dummytoken"
#if !defined(GOOGLE_API_KEY)
#define GOOGLE_API_KEY DUMMY_API_TOKEN
#endif
#if !defined(GOOGLE_CLIENT_ID_MAIN)
#define GOOGLE_CLIENT_ID_MAIN DUMMY_API_TOKEN
#endif
#if !defined(GOOGLE_CLIENT_SECRET_MAIN)
#define GOOGLE_CLIENT_SECRET_MAIN DUMMY_API_TOKEN
#endif
#if !defined(GOOGLE_CLIENT_ID_CLOUD_PRINT)
#define GOOGLE_CLIENT_ID_CLOUD_PRINT DUMMY_API_TOKEN
#endif
#if !defined(GOOGLE_CLIENT_SECRET_CLOUD_PRINT)
#define GOOGLE_CLIENT_SECRET_CLOUD_PRINT DUMMY_API_TOKEN
#endif
#if !defined(GOOGLE_CLIENT_ID_REMOTING)
#define GOOGLE_CLIENT_ID_REMOTING DUMMY_API_TOKEN
#endif
#if !defined(GOOGLE_CLIENT_SECRET_REMOTING)
#define GOOGLE_CLIENT_SECRET_REMOTING DUMMY_API_TOKEN
#endif
// These are used as shortcuts for developers and users providing
// OAuth credentials via preprocessor defines or environment
// variables. If set, they will be used to replace any of the client
// IDs and secrets above that have not been set (and only those; they
// will not override already-set values).
#if !defined(GOOGLE_DEFAULT_CLIENT_ID)
#define GOOGLE_DEFAULT_CLIENT_ID ""
#endif
#if !defined(GOOGLE_DEFAULT_CLIENT_SECRET)
#define GOOGLE_DEFAULT_CLIENT_SECRET ""
#endif
namespace switches {
// Specifies custom OAuth2 client id for testing purposes.
const char kOAuth2ClientID[] = "oauth2-client-id";
// Specifies custom OAuth2 client secret for testing purposes.
const char kOAuth2ClientSecret[] = "oauth2-client-secret";
} // namespace switches
namespace google_apis {
// This is used as a lazy instance to determine keys once and cache them.
class APIKeyCache {
public:
APIKeyCache() {
scoped_ptr<base::Environment> environment(base::Environment::Create());
CommandLine* command_line = CommandLine::ForCurrentProcess();
api_key_ = CalculateKeyValue(GOOGLE_API_KEY,
STRINGIZE_NO_EXPANSION(GOOGLE_API_KEY),
NULL, "",
environment.get(),
command_line);
std::string default_client_id = CalculateKeyValue(
GOOGLE_DEFAULT_CLIENT_ID,
STRINGIZE_NO_EXPANSION(GOOGLE_DEFAULT_CLIENT_ID),
NULL, "",
environment.get(),
command_line);
std::string default_client_secret = CalculateKeyValue(
GOOGLE_DEFAULT_CLIENT_SECRET,
STRINGIZE_NO_EXPANSION(GOOGLE_DEFAULT_CLIENT_SECRET),
NULL, "",
environment.get(),
command_line);
// We currently only allow overriding the baked-in values for the
// default OAuth2 client ID and secret using a command-line
// argument, since that is useful to enable testing against
// staging servers, and since that was what was possible and
// likely practiced by the QA team before this implementation was
// written.
client_ids_[CLIENT_MAIN] = CalculateKeyValue(
GOOGLE_CLIENT_ID_MAIN,
STRINGIZE_NO_EXPANSION(GOOGLE_CLIENT_ID_MAIN),
switches::kOAuth2ClientID,
default_client_id,
environment.get(),
command_line);
client_secrets_[CLIENT_MAIN] = CalculateKeyValue(
GOOGLE_CLIENT_SECRET_MAIN,
STRINGIZE_NO_EXPANSION(GOOGLE_CLIENT_SECRET_MAIN),
switches::kOAuth2ClientSecret,
default_client_secret,
environment.get(),
command_line);
client_ids_[CLIENT_CLOUD_PRINT] = CalculateKeyValue(
GOOGLE_CLIENT_ID_CLOUD_PRINT,
STRINGIZE_NO_EXPANSION(GOOGLE_CLIENT_ID_CLOUD_PRINT),
NULL,
default_client_id,
environment.get(),
command_line);
client_secrets_[CLIENT_CLOUD_PRINT] = CalculateKeyValue(
GOOGLE_CLIENT_SECRET_CLOUD_PRINT,
STRINGIZE_NO_EXPANSION(GOOGLE_CLIENT_SECRET_CLOUD_PRINT),
NULL,
default_client_secret,
environment.get(),
command_line);
client_ids_[CLIENT_REMOTING] = CalculateKeyValue(
GOOGLE_CLIENT_ID_REMOTING,
STRINGIZE_NO_EXPANSION(GOOGLE_CLIENT_ID_REMOTING),
NULL,
default_client_id,
environment.get(),
command_line);
client_secrets_[CLIENT_REMOTING] = CalculateKeyValue(
GOOGLE_CLIENT_SECRET_REMOTING,
STRINGIZE_NO_EXPANSION(GOOGLE_CLIENT_SECRET_REMOTING),
NULL,
default_client_secret,
environment.get(),
command_line);
}
std::string api_key() const { return api_key_; }
std::string GetClientID(OAuth2Client client) const {
DCHECK_LT(client, CLIENT_NUM_ITEMS);
return client_ids_[client];
}
std::string GetClientSecret(OAuth2Client client) const {
DCHECK_LT(client, CLIENT_NUM_ITEMS);
return client_secrets_[client];
}
private:
// Gets a value for a key. In priority order, this will be the value
// provided via a command-line switch, the value provided via an
// environment variable, or finally a value baked into the build.
// |command_line_switch| may be NULL.
static std::string CalculateKeyValue(const char* baked_in_value,
const char* environment_variable_name,
const char* command_line_switch,
const std::string& default_if_unset,
base::Environment* environment,
CommandLine* command_line) {
std::string key_value = baked_in_value;
std::string temp;
if (environment->GetVar(environment_variable_name, &temp)) {
key_value = temp;
LOG(INFO) << "Overriding API key " << environment_variable_name
<< " with value " << key_value << " from environment variable.";
}
if (command_line_switch && command_line->HasSwitch(command_line_switch)) {
key_value = command_line->GetSwitchValueASCII(command_line_switch);
LOG(INFO) << "Overriding API key " << environment_variable_name
<< " with value " << key_value << " from command-line switch.";
}
if (key_value == DUMMY_API_TOKEN) {
#if defined(GOOGLE_CHROME_BUILD)
// No key should be unset in an official build except the
// GOOGLE_DEFAULT_* keys. The default keys don't trigger this
// check as their "unset" value is not DUMMY_API_TOKEN.
CHECK(false);
#endif
if (default_if_unset.size() > 0) {
LOG(INFO) << "Using default value \"" << default_if_unset
<< "\" for API key " << environment_variable_name;
key_value = default_if_unset;
}
}
// This should remain a debug-only log.
DVLOG(1) << "API key " << environment_variable_name << "=" << key_value;
return key_value;
}
std::string api_key_;
std::string client_ids_[CLIENT_NUM_ITEMS];
std::string client_secrets_[CLIENT_NUM_ITEMS];
};
static base::LazyInstance<APIKeyCache> g_api_key_cache =
LAZY_INSTANCE_INITIALIZER;
std::string GetAPIKey() {
return g_api_key_cache.Get().api_key();
}
std::string GetOAuth2ClientID(OAuth2Client client) {
return g_api_key_cache.Get().GetClientID(client);
}
std::string GetOAuth2ClientSecret(OAuth2Client client) {
return g_api_key_cache.Get().GetClientSecret(client);
}
} // namespace google_apis
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