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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab ft=cpp
#ifndef CEPH_RGW_AUTH_KEYSTONE_H
#define CEPH_RGW_AUTH_KEYSTONE_H
#include <string_view>
#include <utility>
#include <boost/optional.hpp>
#include "rgw_auth.h"
#include "rgw_rest_s3.h"
#include "rgw_common.h"
#include "rgw_keystone.h"
namespace rgw {
namespace auth {
namespace keystone {
/* Dedicated namespace for Keystone-related auth engines. We need it because
* Keystone offers three different authentication mechanisms (token, EC2 and
* regular user/pass). RadosGW actually does support the first two. */
class TokenEngine : public rgw::auth::Engine {
CephContext* const cct;
using acl_strategy_t = rgw::auth::RemoteApplier::acl_strategy_t;
using auth_info_t = rgw::auth::RemoteApplier::AuthInfo;
using result_t = rgw::auth::Engine::result_t;
using token_envelope_t = rgw::keystone::TokenEnvelope;
const rgw::auth::TokenExtractor* const extractor;
const rgw::auth::RemoteApplier::Factory* const apl_factory;
rgw::keystone::Config& config;
rgw::keystone::TokenCache& token_cache;
/* Helper methods. */
bool is_applicable(const std::string& token) const noexcept;
boost::optional<token_envelope_t>
get_from_keystone(const DoutPrefixProvider* dpp, const std::string& token) const;
acl_strategy_t get_acl_strategy(const token_envelope_t& token) const;
auth_info_t get_creds_info(const token_envelope_t& token,
const std::vector<std::string>& admin_roles
) const noexcept;
result_t authenticate(const DoutPrefixProvider* dpp,
const std::string& token,
const req_state* s) const;
public:
TokenEngine(CephContext* const cct,
const rgw::auth::TokenExtractor* const extractor,
const rgw::auth::RemoteApplier::Factory* const apl_factory,
rgw::keystone::Config& config,
rgw::keystone::TokenCache& token_cache)
: cct(cct),
extractor(extractor),
apl_factory(apl_factory),
config(config),
token_cache(token_cache) {
}
const char* get_name() const noexcept override {
return "rgw::auth::keystone::TokenEngine";
}
result_t authenticate(const DoutPrefixProvider* dpp, const req_state* const s,
optional_yield y) const override {
return authenticate(dpp, extractor->get_token(s), s);
}
}; /* class TokenEngine */
class SecretCache {
using token_envelope_t = rgw::keystone::TokenEnvelope;
struct secret_entry {
token_envelope_t token;
std::string secret;
utime_t expires;
list<std::string>::iterator lru_iter;
};
const boost::intrusive_ptr<CephContext> cct;
std::map<std::string, secret_entry> secrets;
std::list<std::string> secrets_lru;
std::mutex lock;
const size_t max;
const utime_t s3_token_expiry_length;
SecretCache()
: cct(g_ceph_context),
lock(),
max(cct->_conf->rgw_keystone_token_cache_size),
s3_token_expiry_length(300, 0) {
}
~SecretCache() {}
public:
SecretCache(const SecretCache&) = delete;
void operator=(const SecretCache&) = delete;
static SecretCache& get_instance() {
/* In C++11 this is thread safe. */
static SecretCache instance;
return instance;
}
bool find(const std::string& token_id, token_envelope_t& token, std::string& secret);
boost::optional<boost::tuple<token_envelope_t, std::string>> find(const std::string& token_id) {
token_envelope_t token_envlp;
std::string secret;
if (find(token_id, token_envlp, secret)) {
return boost::make_tuple(token_envlp, secret);
}
return boost::none;
}
void add(const std::string& token_id, const token_envelope_t& token, const std::string& secret);
}; /* class SecretCache */
class EC2Engine : public rgw::auth::s3::AWSEngine {
using acl_strategy_t = rgw::auth::RemoteApplier::acl_strategy_t;
using auth_info_t = rgw::auth::RemoteApplier::AuthInfo;
using result_t = rgw::auth::Engine::result_t;
using token_envelope_t = rgw::keystone::TokenEnvelope;
const rgw::auth::RemoteApplier::Factory* const apl_factory;
rgw::keystone::Config& config;
rgw::keystone::TokenCache& token_cache;
rgw::auth::keystone::SecretCache& secret_cache;
/* Helper methods. */
acl_strategy_t get_acl_strategy(const token_envelope_t& token) const;
auth_info_t get_creds_info(const token_envelope_t& token,
const std::vector<std::string>& admin_roles,
const std::string& access_key_id
) const noexcept;
std::pair<boost::optional<token_envelope_t>, int>
get_from_keystone(const DoutPrefixProvider* dpp,
const std::string_view& access_key_id,
const std::string& string_to_sign,
const std::string_view& signature) const;
std::pair<boost::optional<token_envelope_t>, int>
get_access_token(const DoutPrefixProvider* dpp,
const std::string_view& access_key_id,
const std::string& string_to_sign,
const std::string_view& signature,
const signature_factory_t& signature_factory) const;
result_t authenticate(const DoutPrefixProvider* dpp,
const std::string_view& access_key_id,
const std::string_view& signature,
const std::string_view& session_token,
const string_to_sign_t& string_to_sign,
const signature_factory_t& signature_factory,
const completer_factory_t& completer_factory,
const req_state* s,
optional_yield y) const override;
std::pair<boost::optional<std::string>, int> get_secret_from_keystone(const DoutPrefixProvider* dpp,
const std::string& user_id,
const std::string_view& access_key_id) const;
public:
EC2Engine(CephContext* const cct,
const rgw::auth::s3::AWSEngine::VersionAbstractor* const ver_abstractor,
const rgw::auth::RemoteApplier::Factory* const apl_factory,
rgw::keystone::Config& config,
/* The token cache is used ONLY for the retrieving admin token.
* Due to the architecture of AWS Auth S3 credentials cannot be
* cached at all. */
rgw::keystone::TokenCache& token_cache,
rgw::auth::keystone::SecretCache& secret_cache)
: AWSEngine(cct, *ver_abstractor),
apl_factory(apl_factory),
config(config),
token_cache(token_cache),
secret_cache(secret_cache) {
}
using AWSEngine::authenticate;
const char* get_name() const noexcept override {
return "rgw::auth::keystone::EC2Engine";
}
}; /* class EC2Engine */
}; /* namespace keystone */
}; /* namespace auth */
}; /* namespace rgw */
#endif /* CEPH_RGW_AUTH_KEYSTONE_H */
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