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