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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 | #include <array> | |
494da23a | 5 | #include <algorithm> |
f67539c2 | 6 | #include <string_view> |
7c673cae | 7 | |
7c673cae | 8 | #include <boost/container/static_vector.hpp> |
d2e6a577 FG |
9 | #include <boost/algorithm/string/predicate.hpp> |
10 | #include <boost/algorithm/string.hpp> | |
7c673cae FG |
11 | |
12 | #include "rgw_swift_auth.h" | |
13 | #include "rgw_rest.h" | |
14 | ||
15 | #include "common/ceph_crypto.h" | |
16 | #include "common/Clock.h" | |
17 | ||
11fdf7f2 | 18 | #include "include/random.h" |
7c673cae FG |
19 | |
20 | #include "rgw_client_io.h" | |
21 | #include "rgw_http_client.h" | |
f67539c2 | 22 | #include "rgw_sal_rados.h" |
7c673cae FG |
23 | #include "include/str_list.h" |
24 | ||
25 | #define dout_context g_ceph_context | |
26 | #define dout_subsys ceph_subsys_rgw | |
27 | ||
28 | #define DEFAULT_SWIFT_PREFIX "/swift" | |
29 | ||
20effc67 | 30 | using namespace std; |
7c673cae FG |
31 | using namespace ceph::crypto; |
32 | ||
33 | ||
34 | namespace rgw { | |
35 | namespace auth { | |
36 | namespace swift { | |
37 | ||
38 | /* TempURL: applier */ | |
11fdf7f2 | 39 | void TempURLApplier::modify_request_state(const DoutPrefixProvider* dpp, req_state* s) const /* in/out */ |
7c673cae FG |
40 | { |
41 | bool inline_exists = false; | |
42 | const std::string& filename = s->info.args.get("filename"); | |
43 | ||
44 | s->info.args.get("inline", &inline_exists); | |
45 | if (inline_exists) { | |
46 | s->content_disp.override = "inline"; | |
47 | } else if (!filename.empty()) { | |
48 | std::string fenc; | |
49 | url_encode(filename, fenc); | |
50 | s->content_disp.override = "attachment; filename=\"" + fenc + "\""; | |
51 | } else { | |
52 | std::string fenc; | |
f67539c2 | 53 | url_encode(s->object->get_name(), fenc); |
7c673cae FG |
54 | s->content_disp.fallback = "attachment; filename=\"" + fenc + "\""; |
55 | } | |
56 | ||
11fdf7f2 | 57 | ldpp_dout(dpp, 20) << "finished applying changes to req_state for TempURL: " |
7c673cae FG |
58 | << " content_disp override " << s->content_disp.override |
59 | << " content_disp fallback " << s->content_disp.fallback | |
60 | << dendl; | |
61 | ||
62 | } | |
63 | ||
2a845540 TL |
64 | void TempURLApplier::write_ops_log_entry(rgw_log_entry& entry) const |
65 | { | |
66 | LocalApplier::write_ops_log_entry(entry); | |
67 | entry.temp_url = true; | |
68 | } | |
69 | ||
7c673cae FG |
70 | /* TempURL: engine */ |
71 | bool TempURLEngine::is_applicable(const req_state* const s) const noexcept | |
72 | { | |
73 | return s->info.args.exists("temp_url_sig") || | |
74 | s->info.args.exists("temp_url_expires"); | |
75 | } | |
76 | ||
11fdf7f2 | 77 | void TempURLEngine::get_owner_info(const DoutPrefixProvider* dpp, const req_state* const s, |
f67539c2 | 78 | RGWUserInfo& owner_info, optional_yield y) const |
7c673cae FG |
79 | { |
80 | /* We cannot use req_state::bucket_name because it isn't available | |
81 | * now. It will be initialized in RGWHandler_REST_SWIFT::postauth_init(). */ | |
82 | const string& bucket_name = s->init_state.url_bucket; | |
83 | ||
84 | /* TempURL requires that bucket and object names are specified. */ | |
f67539c2 | 85 | if (bucket_name.empty() || s->object->empty()) { |
7c673cae FG |
86 | throw -EPERM; |
87 | } | |
88 | ||
89 | /* TempURL case is completely different than the Keystone auth - you may | |
90 | * get account name only through extraction from URL. In turn, knowledge | |
91 | * about account is neccessary to obtain its bucket tenant. Without that, | |
92 | * the access would be limited to accounts with empty tenant. */ | |
93 | string bucket_tenant; | |
94 | if (!s->account_name.empty()) { | |
7c673cae | 95 | bool found = false; |
20effc67 | 96 | std::unique_ptr<rgw::sal::User> user; |
7c673cae | 97 | |
20effc67 | 98 | rgw_user uid(s->account_name); |
7c673cae | 99 | if (uid.tenant.empty()) { |
20effc67 | 100 | rgw_user tenanted_uid(uid.id, uid.id); |
1e59de90 | 101 | user = driver->get_user(tenanted_uid); |
20effc67 TL |
102 | if (user->load_user(dpp, s->yield) >= 0) { |
103 | /* Succeeded */ | |
104 | found = true; | |
7c673cae FG |
105 | } |
106 | } | |
107 | ||
20effc67 | 108 | if (!found) { |
1e59de90 | 109 | user = driver->get_user(uid); |
20effc67 TL |
110 | if (user->load_user(dpp, s->yield) < 0) { |
111 | throw -EPERM; | |
112 | } | |
7c673cae | 113 | } |
20effc67 TL |
114 | |
115 | bucket_tenant = user->get_tenant(); | |
7c673cae FG |
116 | } |
117 | ||
9f95a23c TL |
118 | rgw_bucket b; |
119 | b.tenant = std::move(bucket_tenant); | |
120 | b.name = std::move(bucket_name); | |
20effc67 | 121 | std::unique_ptr<rgw::sal::Bucket> bucket; |
1e59de90 | 122 | int ret = driver->get_bucket(dpp, nullptr, b, &bucket, s->yield); |
7c673cae FG |
123 | if (ret < 0) { |
124 | throw ret; | |
125 | } | |
126 | ||
20effc67 | 127 | ldpp_dout(dpp, 20) << "temp url user (bucket owner): " << bucket->get_info().owner |
7c673cae FG |
128 | << dendl; |
129 | ||
20effc67 | 130 | std::unique_ptr<rgw::sal::User> user; |
1e59de90 | 131 | user = driver->get_user(bucket->get_info().owner); |
20effc67 | 132 | if (user->load_user(dpp, s->yield) < 0) { |
7c673cae FG |
133 | throw -EPERM; |
134 | } | |
20effc67 TL |
135 | |
136 | owner_info = user->get_info(); | |
7c673cae FG |
137 | } |
138 | ||
11fdf7f2 TL |
139 | std::string TempURLEngine::convert_from_iso8601(std::string expires) const |
140 | { | |
141 | /* Swift's TempURL allows clients to send the expiration as ISO8601- | |
142 | * compatible strings. Though, only plain UNIX timestamp are taken | |
143 | * for the HMAC calculations. We need to make the conversion. */ | |
144 | struct tm date_t; | |
145 | if (!parse_iso8601(expires.c_str(), &date_t, nullptr, true)) { | |
9f95a23c | 146 | return expires; |
11fdf7f2 TL |
147 | } else { |
148 | return std::to_string(internal_timegm(&date_t)); | |
149 | } | |
150 | } | |
151 | ||
7c673cae FG |
152 | bool TempURLEngine::is_expired(const std::string& expires) const |
153 | { | |
154 | string err; | |
155 | const utime_t now = ceph_clock_now(); | |
156 | const uint64_t expiration = (uint64_t)strict_strtoll(expires.c_str(), | |
157 | 10, &err); | |
158 | if (!err.empty()) { | |
159 | dout(5) << "failed to parse temp_url_expires: " << err << dendl; | |
160 | return true; | |
161 | } | |
162 | ||
163 | if (expiration <= (uint64_t)now.sec()) { | |
164 | dout(5) << "temp url expired: " << expiration << " <= " << now.sec() << dendl; | |
165 | return true; | |
166 | } | |
167 | ||
168 | return false; | |
169 | } | |
170 | ||
494da23a TL |
171 | bool TempURLEngine::is_disallowed_header_present(const req_info& info) const |
172 | { | |
173 | static const auto headers = { | |
174 | "HTTP_X_OBJECT_MANIFEST", | |
175 | }; | |
176 | ||
177 | return std::any_of(std::begin(headers), std::end(headers), | |
178 | [&info](const char* header) { | |
179 | return info.env->exists(header); | |
180 | }); | |
181 | } | |
182 | ||
183 | std::string extract_swift_subuser(const std::string& swift_user_name) | |
184 | { | |
7c673cae FG |
185 | size_t pos = swift_user_name.find(':'); |
186 | if (std::string::npos == pos) { | |
187 | return swift_user_name; | |
188 | } else { | |
189 | return swift_user_name.substr(pos + 1); | |
190 | } | |
191 | } | |
192 | ||
193 | class TempURLEngine::SignatureHelper | |
194 | { | |
195 | private: | |
196 | static constexpr uint32_t output_size = | |
197 | CEPH_CRYPTO_HMACSHA1_DIGESTSIZE * 2 + 1; | |
198 | ||
199 | unsigned char dest[CEPH_CRYPTO_HMACSHA1_DIGESTSIZE]; // 20 | |
200 | char dest_str[output_size]; | |
201 | ||
202 | public: | |
203 | SignatureHelper() = default; | |
204 | ||
205 | const char* calc(const std::string& key, | |
f67539c2 TL |
206 | const std::string_view& method, |
207 | const std::string_view& path, | |
7c673cae FG |
208 | const std::string& expires) { |
209 | ||
210 | using ceph::crypto::HMACSHA1; | |
211 | using UCHARPTR = const unsigned char*; | |
212 | ||
213 | HMACSHA1 hmac((UCHARPTR) key.c_str(), key.size()); | |
214 | hmac.Update((UCHARPTR) method.data(), method.size()); | |
215 | hmac.Update((UCHARPTR) "\n", 1); | |
216 | hmac.Update((UCHARPTR) expires.c_str(), expires.size()); | |
217 | hmac.Update((UCHARPTR) "\n", 1); | |
218 | hmac.Update((UCHARPTR) path.data(), path.size()); | |
219 | hmac.Final(dest); | |
220 | ||
221 | buf_to_hex((UCHARPTR) dest, sizeof(dest), dest_str); | |
222 | ||
223 | return dest_str; | |
224 | } | |
225 | ||
226 | bool is_equal_to(const std::string& rhs) const { | |
227 | /* never allow out-of-range exception */ | |
228 | if (rhs.size() < (output_size - 1)) { | |
229 | return false; | |
230 | } | |
231 | return rhs.compare(0 /* pos */, output_size, dest_str) == 0; | |
232 | } | |
233 | ||
234 | }; /* TempURLEngine::SignatureHelper */ | |
235 | ||
d2e6a577 FG |
236 | class TempURLEngine::PrefixableSignatureHelper |
237 | : private TempURLEngine::SignatureHelper { | |
238 | using base_t = SignatureHelper; | |
239 | ||
f67539c2 TL |
240 | const std::string_view decoded_uri; |
241 | const std::string_view object_name; | |
242 | std::string_view no_obj_uri; | |
d2e6a577 FG |
243 | |
244 | const boost::optional<const std::string&> prefix; | |
245 | ||
246 | public: | |
3efd9988 | 247 | PrefixableSignatureHelper(const std::string& _decoded_uri, |
d2e6a577 FG |
248 | const std::string& object_name, |
249 | const boost::optional<const std::string&> prefix) | |
3efd9988 | 250 | : decoded_uri(_decoded_uri), |
d2e6a577 FG |
251 | object_name(object_name), |
252 | prefix(prefix) { | |
3efd9988 FG |
253 | /* Transform: v1/acct/cont/obj - > v1/acct/cont/ |
254 | * | |
f67539c2 | 255 | * NOTE(rzarzynski): we really want to substr() on std::string_view, |
3efd9988 FG |
256 | * not std::string. Otherwise we would end with no_obj_uri referencing |
257 | * a temporary. */ | |
d2e6a577 FG |
258 | no_obj_uri = \ |
259 | decoded_uri.substr(0, decoded_uri.length() - object_name.length()); | |
260 | } | |
261 | ||
262 | const char* calc(const std::string& key, | |
f67539c2 TL |
263 | const std::string_view& method, |
264 | const std::string_view& path, | |
d2e6a577 FG |
265 | const std::string& expires) { |
266 | if (!prefix) { | |
267 | return base_t::calc(key, method, path, expires); | |
268 | } else { | |
269 | const auto prefixed_path = \ | |
270 | string_cat_reserve("prefix:", no_obj_uri, *prefix); | |
271 | return base_t::calc(key, method, prefixed_path, expires); | |
272 | } | |
273 | } | |
274 | ||
275 | bool is_equal_to(const std::string& rhs) const { | |
276 | bool is_auth_ok = base_t::is_equal_to(rhs); | |
277 | ||
278 | if (prefix && is_auth_ok) { | |
279 | const auto prefix_uri = string_cat_reserve(no_obj_uri, *prefix); | |
280 | is_auth_ok = boost::algorithm::starts_with(decoded_uri, prefix_uri); | |
281 | } | |
282 | ||
283 | return is_auth_ok; | |
284 | } | |
285 | }; /* TempURLEngine::PrefixableSignatureHelper */ | |
286 | ||
7c673cae | 287 | TempURLEngine::result_t |
f67539c2 | 288 | TempURLEngine::authenticate(const DoutPrefixProvider* dpp, const req_state* const s, optional_yield y) const |
7c673cae FG |
289 | { |
290 | if (! is_applicable(s)) { | |
291 | return result_t::deny(); | |
292 | } | |
293 | ||
d2e6a577 FG |
294 | /* NOTE(rzarzynski): RGWHTTPArgs::get(), in contrast to RGWEnv::get(), |
295 | * never returns nullptr. If the requested parameter is absent, we will | |
296 | * get the empty string. */ | |
297 | const std::string& temp_url_sig = s->info.args.get("temp_url_sig"); | |
11fdf7f2 TL |
298 | const std::string& temp_url_expires = \ |
299 | convert_from_iso8601(s->info.args.get("temp_url_expires")); | |
7c673cae FG |
300 | |
301 | if (temp_url_sig.empty() || temp_url_expires.empty()) { | |
302 | return result_t::deny(); | |
303 | } | |
304 | ||
d2e6a577 FG |
305 | /* Though, for prefixed tempurls we need to differentiate between empty |
306 | * prefix and lack of prefix. Empty prefix means allowance for whole | |
307 | * container. */ | |
308 | const boost::optional<const std::string&> temp_url_prefix = \ | |
309 | s->info.args.get_optional("temp_url_prefix"); | |
310 | ||
7c673cae FG |
311 | RGWUserInfo owner_info; |
312 | try { | |
f67539c2 | 313 | get_owner_info(dpp, s, owner_info, y); |
7c673cae | 314 | } catch (...) { |
11fdf7f2 | 315 | ldpp_dout(dpp, 5) << "cannot get user_info of account's owner" << dendl; |
7c673cae FG |
316 | return result_t::reject(); |
317 | } | |
318 | ||
319 | if (owner_info.temp_url_keys.empty()) { | |
11fdf7f2 | 320 | ldpp_dout(dpp, 5) << "user does not have temp url key set, aborting" << dendl; |
7c673cae FG |
321 | return result_t::reject(); |
322 | } | |
323 | ||
324 | if (is_expired(temp_url_expires)) { | |
11fdf7f2 | 325 | ldpp_dout(dpp, 5) << "temp url link expired" << dendl; |
224ce89b | 326 | return result_t::reject(-EPERM); |
7c673cae FG |
327 | } |
328 | ||
494da23a TL |
329 | if (is_disallowed_header_present(s->info)) { |
330 | ldout(cct, 5) << "temp url rejected due to disallowed header" << dendl; | |
331 | return result_t::reject(-EINVAL); | |
332 | } | |
333 | ||
7c673cae FG |
334 | /* We need to verify two paths because of compliance with Swift, Tempest |
335 | * and old versions of RadosGW. The second item will have the prefix | |
336 | * of Swift API entry point removed. */ | |
337 | ||
338 | /* XXX can we search this ONCE? */ | |
11fdf7f2 | 339 | const size_t pos = g_conf()->rgw_swift_url_prefix.find_last_not_of('/') + 1; |
f67539c2 TL |
340 | const std::string_view ref_uri = s->decoded_uri; |
341 | const std::array<std::string_view, 2> allowed_paths = { | |
7c673cae FG |
342 | ref_uri, |
343 | ref_uri.substr(pos + 1) | |
344 | }; | |
345 | ||
346 | /* Account owner calculates the signature also against a HTTP method. */ | |
f67539c2 | 347 | boost::container::static_vector<std::string_view, 3> allowed_methods; |
7c673cae FG |
348 | if (strcmp("HEAD", s->info.method) == 0) { |
349 | /* HEAD requests are specially handled. */ | |
350 | /* TODO: after getting a newer boost (with static_vector supporting | |
351 | * initializers lists), get back to the good notation: | |
352 | * allowed_methods = {"HEAD", "GET", "PUT" }; | |
353 | * Just for now let's use emplace_back to construct the vector. */ | |
354 | allowed_methods.emplace_back("HEAD"); | |
355 | allowed_methods.emplace_back("GET"); | |
356 | allowed_methods.emplace_back("PUT"); | |
357 | } else if (strlen(s->info.method) > 0) { | |
358 | allowed_methods.emplace_back(s->info.method); | |
359 | } | |
360 | ||
361 | /* Need to try each combination of keys, allowed path and methods. */ | |
d2e6a577 FG |
362 | PrefixableSignatureHelper sig_helper { |
363 | s->decoded_uri, | |
f67539c2 | 364 | s->object->get_name(), |
d2e6a577 FG |
365 | temp_url_prefix |
366 | }; | |
367 | ||
7c673cae FG |
368 | for (const auto& kv : owner_info.temp_url_keys) { |
369 | const int temp_url_key_num = kv.first; | |
370 | const string& temp_url_key = kv.second; | |
371 | ||
372 | if (temp_url_key.empty()) { | |
373 | continue; | |
374 | } | |
375 | ||
376 | for (const auto& path : allowed_paths) { | |
377 | for (const auto& method : allowed_methods) { | |
378 | const char* const local_sig = sig_helper.calc(temp_url_key, method, | |
379 | path, temp_url_expires); | |
380 | ||
11fdf7f2 | 381 | ldpp_dout(dpp, 20) << "temp url signature [" << temp_url_key_num |
7c673cae FG |
382 | << "] (calculated): " << local_sig |
383 | << dendl; | |
384 | ||
385 | if (sig_helper.is_equal_to(temp_url_sig)) { | |
386 | auto apl = apl_factory->create_apl_turl(cct, s, owner_info); | |
387 | return result_t::grant(std::move(apl)); | |
388 | } else { | |
11fdf7f2 | 389 | ldpp_dout(dpp, 5) << "temp url signature mismatch: " << local_sig |
7c673cae FG |
390 | << " != " << temp_url_sig << dendl; |
391 | } | |
392 | } | |
393 | } | |
394 | } | |
395 | ||
396 | return result_t::reject(); | |
397 | } | |
398 | ||
399 | ||
400 | /* External token */ | |
401 | bool ExternalTokenEngine::is_applicable(const std::string& token) const noexcept | |
402 | { | |
403 | if (token.empty()) { | |
404 | return false; | |
11fdf7f2 | 405 | } else if (g_conf()->rgw_swift_auth_url.empty()) { |
7c673cae FG |
406 | return false; |
407 | } else { | |
408 | return true; | |
409 | } | |
410 | } | |
411 | ||
412 | ExternalTokenEngine::result_t | |
11fdf7f2 TL |
413 | ExternalTokenEngine::authenticate(const DoutPrefixProvider* dpp, |
414 | const std::string& token, | |
f67539c2 | 415 | const req_state* const s, optional_yield y) const |
7c673cae FG |
416 | { |
417 | if (! is_applicable(token)) { | |
418 | return result_t::deny(); | |
419 | } | |
420 | ||
11fdf7f2 | 421 | std::string auth_url = g_conf()->rgw_swift_auth_url; |
31f18b77 | 422 | if (auth_url.back() != '/') { |
7c673cae FG |
423 | auth_url.append("/"); |
424 | } | |
425 | ||
426 | auth_url.append("token"); | |
427 | char url_buf[auth_url.size() + 1 + token.length() + 1]; | |
428 | sprintf(url_buf, "%s/%s", auth_url.c_str(), token.c_str()); | |
429 | ||
11fdf7f2 | 430 | RGWHTTPHeadersCollector validator(cct, "GET", url_buf, { "X-Auth-Groups", "X-Auth-Ttl" }); |
7c673cae | 431 | |
11fdf7f2 | 432 | ldpp_dout(dpp, 10) << "rgw_swift_validate_token url=" << url_buf << dendl; |
7c673cae | 433 | |
f67539c2 | 434 | int ret = validator.process(y); |
7c673cae FG |
435 | if (ret < 0) { |
436 | throw ret; | |
437 | } | |
438 | ||
439 | std::string swift_user; | |
440 | try { | |
441 | std::vector<std::string> swift_groups; | |
442 | get_str_vec(validator.get_header_value("X-Auth-Groups"), | |
443 | ",", swift_groups); | |
444 | ||
445 | if (0 == swift_groups.size()) { | |
31f18b77 | 446 | return result_t::deny(-EPERM); |
7c673cae FG |
447 | } else { |
448 | swift_user = std::move(swift_groups[0]); | |
449 | } | |
11fdf7f2 | 450 | } catch (const std::out_of_range&) { |
7c673cae | 451 | /* The X-Auth-Groups header isn't present in the response. */ |
31f18b77 | 452 | return result_t::deny(-EPERM); |
7c673cae FG |
453 | } |
454 | ||
455 | if (swift_user.empty()) { | |
31f18b77 | 456 | return result_t::deny(-EPERM); |
7c673cae FG |
457 | } |
458 | ||
11fdf7f2 | 459 | ldpp_dout(dpp, 10) << "swift user=" << swift_user << dendl; |
7c673cae | 460 | |
20effc67 | 461 | std::unique_ptr<rgw::sal::User> user; |
1e59de90 | 462 | ret = driver->get_user_by_swift(dpp, swift_user, s->yield, &user); |
7c673cae | 463 | if (ret < 0) { |
11fdf7f2 | 464 | ldpp_dout(dpp, 0) << "NOTICE: couldn't map swift user" << dendl; |
7c673cae FG |
465 | throw ret; |
466 | } | |
467 | ||
20effc67 | 468 | auto apl = apl_factory->create_apl_local(cct, s, user->get_info(), |
11fdf7f2 | 469 | extract_swift_subuser(swift_user), |
2a845540 | 470 | std::nullopt, rgw::auth::LocalApplier::NO_ACCESS_KEY); |
7c673cae FG |
471 | return result_t::grant(std::move(apl)); |
472 | } | |
473 | ||
474 | static int build_token(const string& swift_user, | |
475 | const string& key, | |
476 | const uint64_t nonce, | |
477 | const utime_t& expiration, | |
478 | bufferlist& bl) | |
479 | { | |
11fdf7f2 TL |
480 | using ceph::encode; |
481 | encode(swift_user, bl); | |
482 | encode(nonce, bl); | |
483 | encode(expiration, bl); | |
7c673cae FG |
484 | |
485 | bufferptr p(CEPH_CRYPTO_HMACSHA1_DIGESTSIZE); | |
486 | ||
487 | char buf[bl.length() * 2 + 1]; | |
488 | buf_to_hex((const unsigned char *)bl.c_str(), bl.length(), buf); | |
489 | dout(20) << "build_token token=" << buf << dendl; | |
490 | ||
491 | char k[CEPH_CRYPTO_HMACSHA1_DIGESTSIZE]; | |
92f5a8d4 TL |
492 | // FIPS zeroization audit 20191116: this memset is not intended to |
493 | // wipe out a secret after use. | |
7c673cae FG |
494 | memset(k, 0, sizeof(k)); |
495 | const char *s = key.c_str(); | |
496 | for (int i = 0; i < (int)key.length(); i++, s++) { | |
497 | k[i % CEPH_CRYPTO_HMACSHA1_DIGESTSIZE] |= *s; | |
498 | } | |
499 | calc_hmac_sha1(k, sizeof(k), bl.c_str(), bl.length(), p.c_str()); | |
92f5a8d4 | 500 | ::ceph::crypto::zeroize_for_security(k, sizeof(k)); |
7c673cae FG |
501 | |
502 | bl.append(p); | |
503 | ||
504 | return 0; | |
505 | ||
506 | } | |
507 | ||
508 | static int encode_token(CephContext *cct, string& swift_user, string& key, | |
509 | bufferlist& bl) | |
510 | { | |
11fdf7f2 | 511 | const auto nonce = ceph::util::generate_random_number<uint64_t>(); |
7c673cae FG |
512 | |
513 | utime_t expiration = ceph_clock_now(); | |
514 | expiration += cct->_conf->rgw_swift_token_expiration; | |
515 | ||
516 | return build_token(swift_user, key, nonce, expiration, bl); | |
517 | } | |
518 | ||
519 | ||
520 | /* AUTH_rgwtk (signed token): engine */ | |
521 | bool SignedTokenEngine::is_applicable(const std::string& token) const noexcept | |
522 | { | |
523 | if (token.empty()) { | |
524 | return false; | |
525 | } else { | |
526 | return token.compare(0, 10, "AUTH_rgwtk") == 0; | |
527 | } | |
528 | } | |
529 | ||
530 | SignedTokenEngine::result_t | |
11fdf7f2 TL |
531 | SignedTokenEngine::authenticate(const DoutPrefixProvider* dpp, |
532 | const std::string& token, | |
7c673cae FG |
533 | const req_state* const s) const |
534 | { | |
535 | if (! is_applicable(token)) { | |
31f18b77 | 536 | return result_t::deny(-EPERM); |
7c673cae FG |
537 | } |
538 | ||
539 | /* Effective token string is the part after the prefix. */ | |
540 | const std::string etoken = token.substr(strlen("AUTH_rgwtk")); | |
541 | const size_t etoken_len = etoken.length(); | |
542 | ||
543 | if (etoken_len & 1) { | |
11fdf7f2 | 544 | ldpp_dout(dpp, 0) << "NOTICE: failed to verify token: odd token length=" |
7c673cae FG |
545 | << etoken_len << dendl; |
546 | throw -EINVAL; | |
547 | } | |
548 | ||
549 | ceph::bufferptr p(etoken_len/2); | |
550 | int ret = hex_to_buf(etoken.c_str(), p.c_str(), etoken_len); | |
551 | if (ret < 0) { | |
552 | throw ret; | |
553 | } | |
554 | ||
555 | ceph::bufferlist tok_bl; | |
556 | tok_bl.append(p); | |
557 | ||
558 | uint64_t nonce; | |
559 | utime_t expiration; | |
560 | std::string swift_user; | |
561 | ||
562 | try { | |
11fdf7f2 | 563 | auto iter = tok_bl.cbegin(); |
7c673cae | 564 | |
11fdf7f2 TL |
565 | using ceph::decode; |
566 | decode(swift_user, iter); | |
567 | decode(nonce, iter); | |
568 | decode(expiration, iter); | |
7c673cae | 569 | } catch (buffer::error& err) { |
11fdf7f2 | 570 | ldpp_dout(dpp, 0) << "NOTICE: failed to decode token" << dendl; |
7c673cae FG |
571 | throw -EINVAL; |
572 | } | |
573 | ||
574 | const utime_t now = ceph_clock_now(); | |
575 | if (expiration < now) { | |
11fdf7f2 | 576 | ldpp_dout(dpp, 0) << "NOTICE: old timed out token was used now=" << now |
7c673cae FG |
577 | << " token.expiration=" << expiration |
578 | << dendl; | |
31f18b77 | 579 | return result_t::deny(-EPERM); |
7c673cae FG |
580 | } |
581 | ||
20effc67 | 582 | std::unique_ptr<rgw::sal::User> user; |
1e59de90 | 583 | ret = driver->get_user_by_swift(dpp, swift_user, s->yield, &user); |
7c673cae FG |
584 | if (ret < 0) { |
585 | throw ret; | |
586 | } | |
587 | ||
11fdf7f2 | 588 | ldpp_dout(dpp, 10) << "swift_user=" << swift_user << dendl; |
7c673cae | 589 | |
20effc67 TL |
590 | const auto siter = user->get_info().swift_keys.find(swift_user); |
591 | if (siter == std::end(user->get_info().swift_keys)) { | |
31f18b77 | 592 | return result_t::deny(-EPERM); |
7c673cae FG |
593 | } |
594 | ||
595 | const auto swift_key = siter->second; | |
596 | ||
597 | bufferlist local_tok_bl; | |
598 | ret = build_token(swift_user, swift_key.key, nonce, expiration, local_tok_bl); | |
599 | if (ret < 0) { | |
600 | throw ret; | |
601 | } | |
602 | ||
603 | if (local_tok_bl.length() != tok_bl.length()) { | |
11fdf7f2 | 604 | ldpp_dout(dpp, 0) << "NOTICE: tokens length mismatch:" |
7c673cae FG |
605 | << " tok_bl.length()=" << tok_bl.length() |
606 | << " local_tok_bl.length()=" << local_tok_bl.length() | |
607 | << dendl; | |
31f18b77 | 608 | return result_t::deny(-EPERM); |
7c673cae FG |
609 | } |
610 | ||
611 | if (memcmp(local_tok_bl.c_str(), tok_bl.c_str(), | |
612 | local_tok_bl.length()) != 0) { | |
613 | char buf[local_tok_bl.length() * 2 + 1]; | |
614 | ||
615 | buf_to_hex(reinterpret_cast<const unsigned char *>(local_tok_bl.c_str()), | |
616 | local_tok_bl.length(), buf); | |
617 | ||
11fdf7f2 | 618 | ldpp_dout(dpp, 0) << "NOTICE: tokens mismatch tok=" << buf << dendl; |
31f18b77 | 619 | return result_t::deny(-EPERM); |
7c673cae FG |
620 | } |
621 | ||
20effc67 | 622 | auto apl = apl_factory->create_apl_local(cct, s, user->get_info(), |
11fdf7f2 | 623 | extract_swift_subuser(swift_user), |
2a845540 | 624 | std::nullopt, rgw::auth::LocalApplier::NO_ACCESS_KEY); |
7c673cae FG |
625 | return result_t::grant(std::move(apl)); |
626 | } | |
627 | ||
628 | } /* namespace swift */ | |
629 | } /* namespace auth */ | |
630 | } /* namespace rgw */ | |
631 | ||
632 | ||
f67539c2 | 633 | void RGW_SWIFT_Auth_Get::execute(optional_yield y) |
7c673cae FG |
634 | { |
635 | int ret = -EPERM; | |
636 | ||
637 | const char *key = s->info.env->get("HTTP_X_AUTH_KEY"); | |
20effc67 | 638 | const char *user_name = s->info.env->get("HTTP_X_AUTH_USER"); |
7c673cae FG |
639 | |
640 | s->prot_flags |= RGW_REST_SWIFT; | |
641 | ||
642 | string user_str; | |
20effc67 | 643 | std::unique_ptr<rgw::sal::User> user; |
7c673cae FG |
644 | bufferlist bl; |
645 | RGWAccessKey *swift_key; | |
646 | map<string, RGWAccessKey>::iterator siter; | |
647 | ||
11fdf7f2 TL |
648 | string swift_url = g_conf()->rgw_swift_url; |
649 | string swift_prefix = g_conf()->rgw_swift_url_prefix; | |
7c673cae FG |
650 | string tenant_path; |
651 | ||
652 | /* | |
653 | * We did not allow an empty Swift prefix before, but we want it now. | |
654 | * So, we take rgw_swift_url_prefix = "/" to yield the empty prefix. | |
655 | * The rgw_swift_url_prefix = "" is the default and yields "/swift" | |
656 | * in a backwards-compatible way. | |
657 | */ | |
658 | if (swift_prefix.size() == 0) { | |
659 | swift_prefix = DEFAULT_SWIFT_PREFIX; | |
660 | } else if (swift_prefix == "/") { | |
661 | swift_prefix.clear(); | |
662 | } else { | |
663 | if (swift_prefix[0] != '/') { | |
664 | swift_prefix.insert(0, "/"); | |
665 | } | |
666 | } | |
667 | ||
668 | if (swift_url.size() == 0) { | |
669 | bool add_port = false; | |
aee94f69 | 670 | auto server_port = s->info.env->get_optional("SERVER_PORT_SECURE"); |
7c673cae FG |
671 | const char *protocol; |
672 | if (server_port) { | |
aee94f69 | 673 | add_port = (*server_port != "443"); |
7c673cae FG |
674 | protocol = "https"; |
675 | } else { | |
aee94f69 TL |
676 | server_port = s->info.env->get_optional("SERVER_PORT"); |
677 | if (server_port) { | |
678 | add_port = (*server_port != "80"); | |
679 | } | |
7c673cae FG |
680 | protocol = "http"; |
681 | } | |
682 | const char *host = s->info.env->get("HTTP_HOST"); | |
683 | if (!host) { | |
684 | dout(0) << "NOTICE: server is misconfigured, missing rgw_swift_url_prefix or rgw_swift_url, HTTP_HOST is not set" << dendl; | |
685 | ret = -EINVAL; | |
686 | goto done; | |
687 | } | |
688 | swift_url = protocol; | |
689 | swift_url.append("://"); | |
690 | swift_url.append(host); | |
691 | if (add_port && !strchr(host, ':')) { | |
692 | swift_url.append(":"); | |
aee94f69 | 693 | swift_url.append(*server_port); |
7c673cae FG |
694 | } |
695 | } | |
696 | ||
20effc67 | 697 | if (!key || !user_name) |
7c673cae FG |
698 | goto done; |
699 | ||
20effc67 | 700 | user_str = user_name; |
7c673cae | 701 | |
1e59de90 | 702 | ret = driver->get_user_by_swift(s, user_str, s->yield, &user); |
20effc67 | 703 | if (ret < 0) { |
7c673cae FG |
704 | ret = -EACCES; |
705 | goto done; | |
706 | } | |
707 | ||
20effc67 TL |
708 | siter = user->get_info().swift_keys.find(user_str); |
709 | if (siter == user->get_info().swift_keys.end()) { | |
7c673cae FG |
710 | ret = -EPERM; |
711 | goto done; | |
712 | } | |
713 | swift_key = &siter->second; | |
714 | ||
715 | if (swift_key->key.compare(key) != 0) { | |
716 | dout(0) << "NOTICE: RGW_SWIFT_Auth_Get::execute(): bad swift key" << dendl; | |
717 | ret = -EPERM; | |
718 | goto done; | |
719 | } | |
720 | ||
11fdf7f2 | 721 | if (!g_conf()->rgw_swift_tenant_name.empty()) { |
7c673cae | 722 | tenant_path = "/AUTH_"; |
11fdf7f2 TL |
723 | tenant_path.append(g_conf()->rgw_swift_tenant_name); |
724 | } else if (g_conf()->rgw_swift_account_in_url) { | |
7c673cae | 725 | tenant_path = "/AUTH_"; |
20effc67 | 726 | tenant_path.append(user->get_id().to_str()); |
7c673cae FG |
727 | } |
728 | ||
729 | dump_header(s, "X-Storage-Url", swift_url + swift_prefix + "/v1" + | |
730 | tenant_path); | |
731 | ||
732 | using rgw::auth::swift::encode_token; | |
733 | if ((ret = encode_token(s->cct, swift_key->id, swift_key->key, bl)) < 0) | |
734 | goto done; | |
735 | ||
736 | { | |
737 | static constexpr size_t PREFIX_LEN = sizeof("AUTH_rgwtk") - 1; | |
738 | char token_val[PREFIX_LEN + bl.length() * 2 + 1]; | |
739 | ||
740 | snprintf(token_val, PREFIX_LEN + 1, "AUTH_rgwtk"); | |
741 | buf_to_hex((const unsigned char *)bl.c_str(), bl.length(), | |
742 | token_val + PREFIX_LEN); | |
743 | ||
744 | dump_header(s, "X-Storage-Token", token_val); | |
745 | dump_header(s, "X-Auth-Token", token_val); | |
746 | } | |
747 | ||
748 | ret = STATUS_NO_CONTENT; | |
749 | ||
750 | done: | |
751 | set_req_state_err(s, ret); | |
752 | dump_errno(s); | |
753 | end_header(s); | |
754 | } | |
755 | ||
1e59de90 | 756 | int RGWHandler_SWIFT_Auth::init(rgw::sal::Driver* driver, req_state *state, |
7c673cae FG |
757 | rgw::io::BasicClient *cio) |
758 | { | |
759 | state->dialect = "swift-auth"; | |
760 | state->formatter = new JSONFormatter; | |
1e59de90 | 761 | state->format = RGWFormat::JSON; |
7c673cae | 762 | |
1e59de90 | 763 | return RGWHandler::init(driver, state, cio); |
7c673cae FG |
764 | } |
765 | ||
f67539c2 | 766 | int RGWHandler_SWIFT_Auth::authorize(const DoutPrefixProvider *dpp, optional_yield) |
7c673cae FG |
767 | { |
768 | return 0; | |
769 | } | |
770 | ||
771 | RGWOp *RGWHandler_SWIFT_Auth::op_get() | |
772 | { | |
773 | return new RGW_SWIFT_Auth_Get; | |
774 | } | |
775 |