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