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7c673cae | 1 | // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- |
9f95a23c | 2 | // vim: ts=8 sw=2 smarttab ft=cpp |
7c673cae FG |
3 | |
4 | #ifndef CEPH_RGW_AUTH_FILTERS_H | |
5 | #define CEPH_RGW_AUTH_FILTERS_H | |
6 | ||
7 | #include <type_traits> | |
8 | ||
9 | #include <boost/logic/tribool.hpp> | |
10 | #include <boost/optional.hpp> | |
11 | ||
f67539c2 | 12 | #include "rgw_service.h" |
7c673cae FG |
13 | #include "rgw_common.h" |
14 | #include "rgw_auth.h" | |
f67539c2 | 15 | #include "rgw_user.h" |
7c673cae FG |
16 | |
17 | namespace rgw { | |
18 | namespace auth { | |
19 | ||
20 | /* Abstract decorator over any implementation of rgw::auth::IdentityApplier | |
21 | * which could be provided both as a pointer-to-object or the object itself. */ | |
22 | template <typename DecorateeT> | |
23 | class DecoratedApplier : public rgw::auth::IdentityApplier { | |
24 | typedef typename std::remove_pointer<DecorateeT>::type DerefedDecorateeT; | |
25 | ||
26 | static_assert(std::is_base_of<rgw::auth::IdentityApplier, | |
27 | DerefedDecorateeT>::value, | |
28 | "DecorateeT must be a subclass of rgw::auth::IdentityApplier"); | |
29 | ||
30 | DecorateeT decoratee; | |
31 | ||
32 | /* There is an indirection layer over accessing decoratee to share the same | |
33 | * code base between dynamic and static decorators. The difference is about | |
34 | * what we store internally: pointer to a decorated object versus the whole | |
35 | * object itself. Googling for "SFINAE" can help to understand the code. */ | |
36 | template <typename T = void, | |
37 | typename std::enable_if< | |
38 | std::is_pointer<DecorateeT>::value, T>::type* = nullptr> | |
39 | DerefedDecorateeT& get_decoratee() { | |
40 | return *decoratee; | |
41 | } | |
42 | ||
43 | template <typename T = void, | |
44 | typename std::enable_if< | |
45 | ! std::is_pointer<DecorateeT>::value, T>::type* = nullptr> | |
46 | DerefedDecorateeT& get_decoratee() { | |
47 | return decoratee; | |
48 | } | |
49 | ||
50 | template <typename T = void, | |
51 | typename std::enable_if< | |
52 | std::is_pointer<DecorateeT>::value, T>::type* = nullptr> | |
53 | const DerefedDecorateeT& get_decoratee() const { | |
54 | return *decoratee; | |
55 | } | |
56 | ||
57 | template <typename T = void, | |
58 | typename std::enable_if< | |
59 | ! std::is_pointer<DecorateeT>::value, T>::type* = nullptr> | |
60 | const DerefedDecorateeT& get_decoratee() const { | |
61 | return decoratee; | |
62 | } | |
63 | ||
64 | public: | |
11fdf7f2 | 65 | explicit DecoratedApplier(DecorateeT&& decoratee) |
7c673cae FG |
66 | : decoratee(std::forward<DecorateeT>(decoratee)) { |
67 | } | |
68 | ||
11fdf7f2 TL |
69 | uint32_t get_perms_from_aclspec(const DoutPrefixProvider* dpp, const aclspec_t& aclspec) const override { |
70 | return get_decoratee().get_perms_from_aclspec(dpp, aclspec); | |
7c673cae FG |
71 | } |
72 | ||
73 | bool is_admin_of(const rgw_user& uid) const override { | |
74 | return get_decoratee().is_admin_of(uid); | |
75 | } | |
76 | ||
77 | bool is_owner_of(const rgw_user& uid) const override { | |
78 | return get_decoratee().is_owner_of(uid); | |
79 | } | |
80 | ||
f91f0fd5 TL |
81 | bool is_anonymous() const override { |
82 | return get_decoratee().is_anonymous(); | |
83 | } | |
84 | ||
7c673cae FG |
85 | uint32_t get_perm_mask() const override { |
86 | return get_decoratee().get_perm_mask(); | |
87 | } | |
88 | ||
11fdf7f2 TL |
89 | uint32_t get_identity_type() const override { |
90 | return get_decoratee().get_identity_type(); | |
91 | } | |
92 | ||
93 | string get_acct_name() const override { | |
94 | return get_decoratee().get_acct_name(); | |
95 | } | |
96 | ||
f6b5b4d7 TL |
97 | string get_subuser() const override { |
98 | return get_decoratee().get_subuser(); | |
99 | } | |
100 | ||
31f18b77 FG |
101 | bool is_identity( |
102 | const boost::container::flat_set<Principal>& ids) const override { | |
103 | return get_decoratee().is_identity(ids); | |
104 | } | |
105 | ||
7c673cae FG |
106 | void to_str(std::ostream& out) const override { |
107 | get_decoratee().to_str(out); | |
108 | } | |
109 | ||
f67539c2 TL |
110 | string get_role_tenant() const override { /* in/out */ |
111 | return get_decoratee().get_role_tenant(); | |
112 | } | |
113 | ||
11fdf7f2 TL |
114 | void load_acct_info(const DoutPrefixProvider* dpp, RGWUserInfo& user_info) const override { /* out */ |
115 | return get_decoratee().load_acct_info(dpp, user_info); | |
7c673cae FG |
116 | } |
117 | ||
11fdf7f2 TL |
118 | void modify_request_state(const DoutPrefixProvider* dpp, req_state * s) const override { /* in/out */ |
119 | return get_decoratee().modify_request_state(dpp, s); | |
7c673cae FG |
120 | } |
121 | }; | |
122 | ||
123 | ||
124 | template <typename T> | |
125 | class ThirdPartyAccountApplier : public DecoratedApplier<T> { | |
9f95a23c | 126 | /* const */RGWCtl* const ctl; |
7c673cae FG |
127 | const rgw_user acct_user_override; |
128 | ||
129 | public: | |
130 | /* A value representing situations where there is no requested account | |
131 | * override. In other words, acct_user_override will be equal to this | |
132 | * constant where the request isn't a cross-tenant one. */ | |
133 | static const rgw_user UNKNOWN_ACCT; | |
134 | ||
135 | template <typename U> | |
9f95a23c | 136 | ThirdPartyAccountApplier(RGWCtl* const ctl, |
11fdf7f2 | 137 | const rgw_user &acct_user_override, |
7c673cae FG |
138 | U&& decoratee) |
139 | : DecoratedApplier<T>(std::move(decoratee)), | |
9f95a23c | 140 | ctl(ctl), |
7c673cae FG |
141 | acct_user_override(acct_user_override) { |
142 | } | |
143 | ||
144 | void to_str(std::ostream& out) const override; | |
11fdf7f2 | 145 | void load_acct_info(const DoutPrefixProvider* dpp, RGWUserInfo& user_info) const override; /* out */ |
7c673cae FG |
146 | }; |
147 | ||
148 | /* static declaration: UNKNOWN_ACCT will be an empty rgw_user that is a result | |
149 | * of the default construction. */ | |
150 | template <typename T> | |
151 | const rgw_user ThirdPartyAccountApplier<T>::UNKNOWN_ACCT; | |
152 | ||
153 | template <typename T> | |
154 | void ThirdPartyAccountApplier<T>::to_str(std::ostream& out) const | |
155 | { | |
156 | out << "rgw::auth::ThirdPartyAccountApplier(" + acct_user_override.to_str() + ")" | |
157 | << " -> "; | |
158 | DecoratedApplier<T>::to_str(out); | |
159 | } | |
160 | ||
161 | template <typename T> | |
11fdf7f2 | 162 | void ThirdPartyAccountApplier<T>::load_acct_info(const DoutPrefixProvider* dpp, RGWUserInfo& user_info) const |
7c673cae FG |
163 | { |
164 | if (UNKNOWN_ACCT == acct_user_override) { | |
165 | /* There is no override specified by the upper layer. This means that we'll | |
166 | * load the account owned by the authenticated identity (aka auth_user). */ | |
11fdf7f2 | 167 | DecoratedApplier<T>::load_acct_info(dpp, user_info); |
7c673cae FG |
168 | } else if (DecoratedApplier<T>::is_owner_of(acct_user_override)) { |
169 | /* The override has been specified but the account belongs to the authenticated | |
170 | * identity. We may safely forward the call to a next stage. */ | |
11fdf7f2 | 171 | DecoratedApplier<T>::load_acct_info(dpp, user_info); |
f91f0fd5 TL |
172 | } else if (this->is_anonymous()) { |
173 | /* If the user was authed by the anonymous engine then scope the ANON user | |
174 | * to the correct tenant */ | |
175 | if (acct_user_override.tenant.empty()) | |
176 | user_info.user_id = rgw_user(acct_user_override.id, RGW_USER_ANON_ID); | |
177 | else | |
178 | user_info.user_id = rgw_user(acct_user_override.tenant, RGW_USER_ANON_ID); | |
7c673cae FG |
179 | } else { |
180 | /* Compatibility mechanism for multi-tenancy. For more details refer to | |
181 | * load_acct_info method of rgw::auth::RemoteApplier. */ | |
182 | if (acct_user_override.tenant.empty()) { | |
183 | const rgw_user tenanted_uid(acct_user_override.id, acct_user_override.id); | |
184 | ||
b3b6e05e | 185 | if (ctl->user->get_info_by_uid(dpp, tenanted_uid, &user_info, null_yield) >= 0) { |
7c673cae FG |
186 | /* Succeeded. */ |
187 | return; | |
188 | } | |
189 | } | |
190 | ||
b3b6e05e | 191 | const int ret = ctl->user->get_info_by_uid(dpp, acct_user_override, &user_info, null_yield); |
7c673cae FG |
192 | if (ret < 0) { |
193 | /* We aren't trying to recover from ENOENT here. It's supposed that creating | |
194 | * someone else's account isn't a thing we want to support in this filter. */ | |
195 | if (ret == -ENOENT) { | |
196 | throw -EACCES; | |
197 | } else { | |
198 | throw ret; | |
199 | } | |
200 | } | |
201 | ||
202 | } | |
203 | } | |
204 | ||
205 | template <typename T> static inline | |
9f95a23c | 206 | ThirdPartyAccountApplier<T> add_3rdparty(RGWCtl* const ctl, |
11fdf7f2 | 207 | const rgw_user &acct_user_override, |
7c673cae | 208 | T&& t) { |
9f95a23c | 209 | return ThirdPartyAccountApplier<T>(ctl, acct_user_override, |
7c673cae FG |
210 | std::forward<T>(t)); |
211 | } | |
212 | ||
213 | ||
214 | template <typename T> | |
215 | class SysReqApplier : public DecoratedApplier<T> { | |
216 | CephContext* const cct; | |
9f95a23c | 217 | /*const*/ RGWCtl* const ctl; |
7c673cae FG |
218 | const RGWHTTPArgs& args; |
219 | mutable boost::tribool is_system; | |
220 | ||
221 | public: | |
222 | template <typename U> | |
223 | SysReqApplier(CephContext* const cct, | |
9f95a23c | 224 | /*const*/ RGWCtl* const ctl, |
7c673cae FG |
225 | const req_state* const s, |
226 | U&& decoratee) | |
227 | : DecoratedApplier<T>(std::forward<T>(decoratee)), | |
228 | cct(cct), | |
9f95a23c | 229 | ctl(ctl), |
7c673cae FG |
230 | args(s->info.args), |
231 | is_system(boost::logic::indeterminate) { | |
232 | } | |
233 | ||
234 | void to_str(std::ostream& out) const override; | |
11fdf7f2 TL |
235 | void load_acct_info(const DoutPrefixProvider* dpp, RGWUserInfo& user_info) const override; /* out */ |
236 | void modify_request_state(const DoutPrefixProvider* dpp, req_state* s) const override; /* in/out */ | |
7c673cae FG |
237 | }; |
238 | ||
239 | template <typename T> | |
240 | void SysReqApplier<T>::to_str(std::ostream& out) const | |
241 | { | |
242 | out << "rgw::auth::SysReqApplier" << " -> "; | |
243 | DecoratedApplier<T>::to_str(out); | |
244 | } | |
245 | ||
246 | template <typename T> | |
11fdf7f2 | 247 | void SysReqApplier<T>::load_acct_info(const DoutPrefixProvider* dpp, RGWUserInfo& user_info) const |
7c673cae | 248 | { |
11fdf7f2 | 249 | DecoratedApplier<T>::load_acct_info(dpp, user_info); |
7c673cae FG |
250 | is_system = user_info.system; |
251 | ||
252 | if (is_system) { | |
11fdf7f2 | 253 | //ldpp_dout(dpp, 20) << "system request" << dendl; |
7c673cae FG |
254 | |
255 | rgw_user effective_uid(args.sys_get(RGW_SYS_PARAM_PREFIX "uid")); | |
256 | if (! effective_uid.empty()) { | |
257 | /* We aren't writing directly to user_info for consistency and security | |
258 | * reasons. rgw_get_user_info_by_uid doesn't trigger the operator=() but | |
259 | * calls ::decode instead. */ | |
260 | RGWUserInfo euser_info; | |
b3b6e05e | 261 | if (ctl->user->get_info_by_uid(dpp, effective_uid, &euser_info, null_yield) < 0) { |
11fdf7f2 | 262 | //ldpp_dout(dpp, 0) << "User lookup failed!" << dendl; |
7c673cae FG |
263 | throw -EACCES; |
264 | } | |
265 | user_info = euser_info; | |
266 | } | |
267 | } | |
268 | } | |
269 | ||
270 | template <typename T> | |
11fdf7f2 | 271 | void SysReqApplier<T>::modify_request_state(const DoutPrefixProvider* dpp, req_state* const s) const |
7c673cae FG |
272 | { |
273 | if (boost::logic::indeterminate(is_system)) { | |
274 | RGWUserInfo unused_info; | |
11fdf7f2 | 275 | load_acct_info(dpp, unused_info); |
7c673cae FG |
276 | } |
277 | ||
278 | if (is_system) { | |
279 | s->info.args.set_system(); | |
280 | s->system_request = true; | |
281 | } | |
11fdf7f2 | 282 | DecoratedApplier<T>::modify_request_state(dpp, s); |
7c673cae FG |
283 | } |
284 | ||
285 | template <typename T> static inline | |
286 | SysReqApplier<T> add_sysreq(CephContext* const cct, | |
9f95a23c | 287 | /* const */ RGWCtl* const ctl, |
7c673cae FG |
288 | const req_state* const s, |
289 | T&& t) { | |
9f95a23c | 290 | return SysReqApplier<T>(cct, ctl, s, std::forward<T>(t)); |
7c673cae FG |
291 | } |
292 | ||
293 | } /* namespace auth */ | |
294 | } /* namespace rgw */ | |
295 | ||
296 | #endif /* CEPH_RGW_AUTH_FILTERS_H */ |