ceph/src/rgw/rgw_swift_auth.cc

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