--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include <array>
+
+#include "rgw_common.h"
+#include "rgw_auth.h"
+#include "rgw_user.h"
+#include "rgw_http_client.h"
+#include "rgw_keystone.h"
+
+#include "include/str_list.h"
+
+#define dout_context g_ceph_context
+#define dout_subsys ceph_subsys_rgw
+
+
+namespace rgw {
+namespace auth {
+
+std::unique_ptr<rgw::auth::Identity>
+transform_old_authinfo(const req_state* const s)
+{
+ /* This class is not intended for public use. Should be removed altogether
+ * with this function after moving all our APIs to the new authentication
+ * infrastructure. */
+ class DummyIdentityApplier : public rgw::auth::Identity {
+ CephContext* const cct;
+
+ /* For this particular case it's OK to use rgw_user structure to convey
+ * the identity info as this was the policy for doing that before the
+ * new auth. */
+ const rgw_user id;
+ const int perm_mask;
+ const bool is_admin;
+ public:
+ DummyIdentityApplier(CephContext* const cct,
+ const rgw_user& auth_id,
+ const int perm_mask,
+ const bool is_admin)
+ : cct(cct),
+ id(auth_id),
+ perm_mask(perm_mask),
+ is_admin(is_admin) {
+ }
+
+ uint32_t get_perms_from_aclspec(const aclspec_t& aclspec) const override {
+ return rgw_perms_from_aclspec_default_strategy(id, aclspec);
+ }
+
+ bool is_admin_of(const rgw_user& acct_id) const override {
+ return is_admin;
+ }
+
+ bool is_owner_of(const rgw_user& acct_id) const override {
+ return id == acct_id;
+ }
+
+ bool is_identity(const idset_t& ids) const override {
+ for (auto& p : ids) {
+ if (p.is_wildcard()) {
+ return true;
+ } else if (p.is_tenant() && p.get_tenant() == id.tenant) {
+ return true;
+ } else if (p.is_user() &&
+ (p.get_tenant() == id.tenant) &&
+ (p.get_id() == id.id)) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ uint32_t get_perm_mask() const override {
+ return perm_mask;
+ }
+
+ void to_str(std::ostream& out) const override {
+ out << "RGWDummyIdentityApplier(auth_id=" << id
+ << ", perm_mask=" << perm_mask
+ << ", is_admin=" << is_admin << ")";
+ }
+ };
+
+ return std::unique_ptr<rgw::auth::Identity>(
+ new DummyIdentityApplier(s->cct,
+ s->user->user_id,
+ s->perm_mask,
+ /* System user has admin permissions by default - it's supposed to pass
+ * through any security check. */
+ s->system_request));
+}
+
+} /* namespace auth */
+} /* namespace rgw */
+
+
+uint32_t rgw_perms_from_aclspec_default_strategy(
+ const rgw_user& uid,
+ const rgw::auth::Identity::aclspec_t& aclspec)
+{
+ dout(5) << "Searching permissions for uid=" << uid << dendl;
+
+ const auto iter = aclspec.find(uid.to_str());
+ if (std::end(aclspec) != iter) {
+ dout(5) << "Found permission: " << iter->second << dendl;
+ return iter->second;
+ }
+
+ dout(5) << "Permissions for user not found" << dendl;
+ return 0;
+}
+
+
+static inline const std::string make_spec_item(const std::string& tenant,
+ const std::string& id)
+{
+ return tenant + ":" + id;
+}
+
+
+static inline std::pair<bool, rgw::auth::Engine::result_t>
+strategy_handle_rejected(rgw::auth::Engine::result_t&& engine_result,
+ const rgw::auth::Strategy::Control policy,
+ rgw::auth::Engine::result_t&& strategy_result)
+{
+ using Control = rgw::auth::Strategy::Control;
+ switch (policy) {
+ case Control::REQUISITE:
+ /* Don't try next. */
+ return std::make_pair(false, std::move(engine_result));
+
+ case Control::SUFFICIENT:
+ /* Don't try next. */
+ return std::make_pair(false, std::move(engine_result));
+
+ case Control::FALLBACK:
+ /* Don't try next. */
+ return std::make_pair(false, std::move(strategy_result));
+
+ default:
+ /* Huh, memory corruption? */
+ abort();
+ }
+}
+
+static inline std::pair<bool, rgw::auth::Engine::result_t>
+strategy_handle_denied(rgw::auth::Engine::result_t&& engine_result,
+ const rgw::auth::Strategy::Control policy,
+ rgw::auth::Engine::result_t&& strategy_result)
+{
+ using Control = rgw::auth::Strategy::Control;
+ switch (policy) {
+ case Control::REQUISITE:
+ /* Don't try next. */
+ return std::make_pair(false, std::move(engine_result));
+
+ case Control::SUFFICIENT:
+ /* Just try next. */
+ return std::make_pair(true, std::move(engine_result));
+
+ case Control::FALLBACK:
+ return std::make_pair(true, std::move(strategy_result));
+
+ default:
+ /* Huh, memory corruption? */
+ abort();
+ }
+}
+
+static inline std::pair<bool, rgw::auth::Engine::result_t>
+strategy_handle_granted(rgw::auth::Engine::result_t&& engine_result,
+ const rgw::auth::Strategy::Control policy,
+ rgw::auth::Engine::result_t&& strategy_result)
+{
+ using Control = rgw::auth::Strategy::Control;
+ switch (policy) {
+ case Control::REQUISITE:
+ /* Try next. */
+ return std::make_pair(true, std::move(engine_result));
+
+ case Control::SUFFICIENT:
+ /* Don't try next. */
+ return std::make_pair(false, std::move(engine_result));
+
+ case Control::FALLBACK:
+ /* Don't try next. */
+ return std::make_pair(false, std::move(engine_result));
+
+ default:
+ /* Huh, memory corruption? */
+ abort();
+ }
+}
+
+rgw::auth::Engine::result_t
+rgw::auth::Strategy::authenticate(const req_state* const s) const
+{
+ result_t strategy_result = result_t::deny();
+
+ for (const stack_item_t& kv : auth_stack) {
+ const rgw::auth::Engine& engine = kv.first;
+ const auto& policy = kv.second;
+
+ dout(20) << get_name() << ": trying " << engine.get_name() << dendl;
+
+ result_t engine_result = result_t::deny();
+ try {
+ engine_result = engine.authenticate(s);
+ } catch (const int err) {
+ engine_result = result_t::deny(err);
+ }
+
+ bool try_next = true;
+ switch (engine_result.get_status()) {
+ case result_t::Status::REJECTED: {
+ dout(20) << engine.get_name() << " rejected with reason="
+ << engine_result.get_reason() << dendl;
+
+ std::tie(try_next, strategy_result) = \
+ strategy_handle_rejected(std::move(engine_result), policy,
+ std::move(strategy_result));
+ break;
+ }
+ case result_t::Status::DENIED: {
+ dout(20) << engine.get_name() << " denied with reason="
+ << engine_result.get_reason() << dendl;
+
+ std::tie(try_next, strategy_result) = \
+ strategy_handle_denied(std::move(engine_result), policy,
+ std::move(strategy_result));
+ break;
+ }
+ case result_t::Status::GRANTED: {
+ dout(20) << engine.get_name() << " granted access" << dendl;
+
+ std::tie(try_next, strategy_result) = \
+ strategy_handle_granted(std::move(engine_result), policy,
+ std::move(strategy_result));
+ break;
+ }
+ default: {
+ abort();
+ }
+ }
+
+ if (! try_next) {
+ break;
+ }
+ }
+
+ return strategy_result;
+}
+
+int
+rgw::auth::Strategy::apply(const rgw::auth::Strategy& auth_strategy,
+ req_state* const s) noexcept
+{
+ try {
+ auto result = auth_strategy.authenticate(s);
+ if (result.get_status() != decltype(result)::Status::GRANTED) {
+ /* Access denied is acknowledged by returning a std::unique_ptr with
+ * nullptr inside. */
+ ldout(s->cct, 5) << "Failed the auth strategy, reason="
+ << result.get_reason() << dendl;
+ return result.get_reason();
+ }
+
+ try {
+ rgw::auth::IdentityApplier::aplptr_t applier = result.get_applier();
+ rgw::auth::Completer::cmplptr_t completer = result.get_completer();
+
+ /* Account used by a given RGWOp is decoupled from identity employed
+ * in the authorization phase (RGWOp::verify_permissions). */
+ applier->load_acct_info(*s->user);
+ s->perm_mask = applier->get_perm_mask();
+
+ /* This is the signle place where we pass req_state as a pointer
+ * to non-const and thus its modification is allowed. In the time
+ * of writing only RGWTempURLEngine needed that feature. */
+ applier->modify_request_state(s);
+ if (completer) {
+ completer->modify_request_state(s);
+ }
+
+ s->auth.identity = std::move(applier);
+ s->auth.completer = std::move(completer);
+
+ return 0;
+ } catch (const int err) {
+ ldout(s->cct, 5) << "applier throwed err=" << err << dendl;
+ return err;
+ }
+ } catch (const int err) {
+ ldout(s->cct, 5) << "auth engine throwed err=" << err << dendl;
+ return err;
+ }
+
+ /* We never should be here. */
+ return -EPERM;
+}
+
+void
+rgw::auth::Strategy::add_engine(const Control ctrl_flag,
+ const Engine& engine) noexcept
+{
+ auth_stack.push_back(std::make_pair(std::cref(engine), ctrl_flag));
+}
+
+
+/* rgw::auth::RemoteAuthApplier */
+uint32_t rgw::auth::RemoteApplier::get_perms_from_aclspec(const aclspec_t& aclspec) const
+{
+ uint32_t perm = 0;
+
+ /* For backward compatibility with ACLOwner. */
+ perm |= rgw_perms_from_aclspec_default_strategy(info.acct_user,
+ aclspec);
+
+ /* We also need to cover cases where rgw_keystone_implicit_tenants
+ * was enabled. */
+ if (info.acct_user.tenant.empty()) {
+ const rgw_user tenanted_acct_user(info.acct_user.id, info.acct_user.id);
+
+ perm |= rgw_perms_from_aclspec_default_strategy(tenanted_acct_user,
+ aclspec);
+ }
+
+ /* Now it's a time for invoking additional strategy that was supplied by
+ * a specific auth engine. */
+ if (extra_acl_strategy) {
+ perm |= extra_acl_strategy(aclspec);
+ }
+
+ ldout(cct, 20) << "from ACL got perm=" << perm << dendl;
+ return perm;
+}
+
+bool rgw::auth::RemoteApplier::is_admin_of(const rgw_user& uid) const
+{
+ return info.is_admin;
+}
+
+bool rgw::auth::RemoteApplier::is_owner_of(const rgw_user& uid) const
+{
+ if (info.acct_user.tenant.empty()) {
+ const rgw_user tenanted_acct_user(info.acct_user.id, info.acct_user.id);
+
+ if (tenanted_acct_user == uid) {
+ return true;
+ }
+ }
+
+ return info.acct_user == uid;
+}
+
+bool rgw::auth::RemoteApplier::is_identity(const idset_t& ids) const {
+ for (auto& id : ids) {
+ if (id.is_wildcard()) {
+ return true;
+
+ // We also need to cover cases where rgw_keystone_implicit_tenants
+ // was enabled. */
+ } else if (id.is_tenant() &&
+ (info.acct_user.tenant.empty() ?
+ info.acct_user.id :
+ info.acct_user.tenant) == id.get_tenant()) {
+ return true;
+ } else if (id.is_user() &&
+ info.acct_user.id == id.get_id() &&
+ (info.acct_user.tenant.empty() ?
+ info.acct_user.id :
+ info.acct_user.tenant) == id.get_tenant()) {
+ return true;
+ }
+ }
+ return false;
+}
+
+void rgw::auth::RemoteApplier::to_str(std::ostream& out) const
+{
+ out << "rgw::auth::RemoteApplier(acct_user=" << info.acct_user
+ << ", acct_name=" << info.acct_name
+ << ", perm_mask=" << info.perm_mask
+ << ", is_admin=" << info.is_admin << ")";
+}
+
+void rgw::auth::RemoteApplier::create_account(const rgw_user& acct_user,
+ RGWUserInfo& user_info) const /* out */
+{
+ rgw_user new_acct_user = acct_user;
+
+ if (info.acct_type) {
+ //ldap/keystone for s3 users
+ user_info.type = info.acct_type;
+ }
+
+ /* An upper layer may enforce creating new accounts within their own
+ * tenants. */
+ if (new_acct_user.tenant.empty() && implicit_tenants) {
+ new_acct_user.tenant = new_acct_user.id;
+ }
+
+ user_info.user_id = new_acct_user;
+ user_info.display_name = info.acct_name;
+
+ int ret = rgw_store_user_info(store, user_info, nullptr, nullptr,
+ real_time(), true);
+ if (ret < 0) {
+ ldout(cct, 0) << "ERROR: failed to store new user info: user="
+ << user_info.user_id << " ret=" << ret << dendl;
+ throw ret;
+ }
+}
+
+/* TODO(rzarzynski): we need to handle display_name changes. */
+void rgw::auth::RemoteApplier::load_acct_info(RGWUserInfo& user_info) const /* out */
+{
+ /* It's supposed that RGWRemoteAuthApplier tries to load account info
+ * that belongs to the authenticated identity. Another policy may be
+ * applied by using a RGWThirdPartyAccountAuthApplier decorator. */
+ const rgw_user& acct_user = info.acct_user;
+
+ /* Normally, empty "tenant" field of acct_user means the authenticated
+ * identity has the legacy, global tenant. However, due to inclusion
+ * of multi-tenancy, we got some special compatibility kludge for remote
+ * backends like Keystone.
+ * If the global tenant is the requested one, we try the same tenant as
+ * the user name first. If that RGWUserInfo exists, we use it. This way,
+ * migrated OpenStack users can get their namespaced containers and nobody's
+ * the wiser.
+ * If that fails, we look up in the requested (possibly empty) tenant.
+ * If that fails too, we create the account within the global or separated
+ * namespace depending on rgw_keystone_implicit_tenants. */
+ if (acct_user.tenant.empty()) {
+ const rgw_user tenanted_uid(acct_user.id, acct_user.id);
+
+ if (rgw_get_user_info_by_uid(store, tenanted_uid, user_info) >= 0) {
+ /* Succeeded. */
+ return;
+ }
+ }
+
+ if (rgw_get_user_info_by_uid(store, acct_user, user_info) < 0) {
+ ldout(cct, 0) << "NOTICE: couldn't map swift user " << acct_user << dendl;
+ create_account(acct_user, user_info);
+ }
+
+ /* Succeeded if we are here (create_account() hasn't throwed). */
+}
+
+
+/* rgw::auth::LocalApplier */
+/* static declaration */
+const std::string rgw::auth::LocalApplier::NO_SUBUSER;
+
+uint32_t rgw::auth::LocalApplier::get_perms_from_aclspec(const aclspec_t& aclspec) const
+{
+ return rgw_perms_from_aclspec_default_strategy(user_info.user_id, aclspec);
+}
+
+bool rgw::auth::LocalApplier::is_admin_of(const rgw_user& uid) const
+{
+ return user_info.admin || user_info.system;
+}
+
+bool rgw::auth::LocalApplier::is_owner_of(const rgw_user& uid) const
+{
+ return uid == user_info.user_id;
+}
+
+bool rgw::auth::LocalApplier::is_identity(const idset_t& ids) const {
+ for (auto& id : ids) {
+ if (id.is_wildcard()) {
+ return true;
+ } else if (id.is_tenant() &&
+ id.get_tenant() == user_info.user_id.tenant) {
+ return true;
+ } else if (id.is_user() &&
+ (id.get_tenant() == user_info.user_id.tenant) &&
+ (id.get_id() == user_info.user_id.id)) {
+ return true;
+ }
+ }
+ return false;
+}
+
+void rgw::auth::LocalApplier::to_str(std::ostream& out) const {
+ out << "rgw::auth::LocalApplier(acct_user=" << user_info.user_id
+ << ", acct_name=" << user_info.display_name
+ << ", subuser=" << subuser
+ << ", perm_mask=" << get_perm_mask()
+ << ", is_admin=" << static_cast<bool>(user_info.admin) << ")";
+}
+
+uint32_t rgw::auth::LocalApplier::get_perm_mask(const std::string& subuser_name,
+ const RGWUserInfo &uinfo) const
+{
+ if (! subuser_name.empty() && subuser_name != NO_SUBUSER) {
+ const auto iter = uinfo.subusers.find(subuser_name);
+
+ if (iter != std::end(uinfo.subusers)) {
+ return iter->second.perm_mask;
+ } else {
+ /* Subuser specified but not found. */
+ return RGW_PERM_NONE;
+ }
+ } else {
+ /* Due to backward compatibility. */
+ return RGW_PERM_FULL_CONTROL;
+ }
+}
+
+void rgw::auth::LocalApplier::load_acct_info(RGWUserInfo& user_info) const /* out */
+{
+ /* Load the account that belongs to the authenticated identity. An extra call
+ * to RADOS may be safely skipped in this case. */
+ user_info = this->user_info;
+}
+
+
+rgw::auth::Engine::result_t
+rgw::auth::AnonymousEngine::authenticate(const req_state* const s) const
+{
+ if (! is_applicable(s)) {
+ return result_t::deny(-EPERM);
+ } else {
+ RGWUserInfo user_info;
+ rgw_get_anon_user(user_info);
+
+ auto apl = \
+ apl_factory->create_apl_local(cct, s, user_info,
+ rgw::auth::LocalApplier::NO_SUBUSER);
+ return result_t::grant(std::move(apl));
+ }
+}
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