Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 770 insertions, 0 deletions

diff --git a/src/rgw/rgw_swift_auth.cc b/src/rgw/rgw_swift_auth.cc
new file mode 100644
index 000000000..4c85d82ba
--- /dev/null
+++ b/src/rgw/rgw_swift_auth.cc
@@ -0,0 +1,770 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab ft=cpp
+
+#include <array>
+#include <algorithm>
+#include <string_view>
+
+#include <boost/container/static_vector.hpp>
+#include <boost/algorithm/string/predicate.hpp>
+#include <boost/algorithm/string.hpp>
+
+#include "rgw_swift_auth.h"
+#include "rgw_rest.h"
+
+#include "common/ceph_crypto.h"
+#include "common/Clock.h"
+
+#include "include/random.h"
+
+#include "rgw_client_io.h"
+#include "rgw_http_client.h"
+#include "rgw_sal_rados.h"
+#include "include/str_list.h"
+
+#define dout_context g_ceph_context
+#define dout_subsys ceph_subsys_rgw
+
+#define DEFAULT_SWIFT_PREFIX "/swift"
+
+using namespace ceph::crypto;
+
+
+namespace rgw {
+namespace auth {
+namespace swift {
+
+/* TempURL: applier */
+void TempURLApplier::modify_request_state(const DoutPrefixProvider* dpp, req_state* s) const       /* in/out */
+{
+  bool inline_exists = false;
+  const std::string& filename = s->info.args.get("filename");
+
+  s->info.args.get("inline", &inline_exists);
+  if (inline_exists) {
+    s->content_disp.override = "inline";
+  } else if (!filename.empty()) {
+    std::string fenc;
+    url_encode(filename, fenc);
+    s->content_disp.override = "attachment; filename=\"" + fenc + "\"";
+  } else {
+    std::string fenc;
+    url_encode(s->object->get_name(), fenc);
+    s->content_disp.fallback = "attachment; filename=\"" + fenc + "\"";
+  }
+
+  ldpp_dout(dpp, 20) << "finished applying changes to req_state for TempURL: "
+                    << " content_disp override " << s->content_disp.override
+                    << " content_disp fallback " << s->content_disp.fallback
+                    << dendl;
+
+}
+
+void TempURLApplier::write_ops_log_entry(rgw_log_entry& entry) const
+{
+  LocalApplier::write_ops_log_entry(entry);
+  entry.temp_url = true;
+}
+
+/* TempURL: engine */
+bool TempURLEngine::is_applicable(const req_state* const s) const noexcept
+{
+  return s->info.args.exists("temp_url_sig") ||
+         s->info.args.exists("temp_url_expires");
+}
+
+void TempURLEngine::get_owner_info(const DoutPrefixProvider* dpp, const req_state* const s,
+                                   RGWUserInfo& owner_info, optional_yield y) const
+{
+  /* We cannot use req_state::bucket_name because it isn't available
+   * now. It will be initialized in RGWHandler_REST_SWIFT::postauth_init(). */
+  const string& bucket_name = s->init_state.url_bucket;
+
+  /* TempURL requires that bucket and object names are specified. */
+  if (bucket_name.empty() || s->object->empty()) {
+    throw -EPERM;
+  }
+
+  /* TempURL case is completely different than the Keystone auth - you may
+   * get account name only through extraction from URL. In turn, knowledge
+   * about account is neccessary to obtain its bucket tenant. Without that,
+   * the access would be limited to accounts with empty tenant. */
+  string bucket_tenant;
+  if (!s->account_name.empty()) {
+    RGWUserInfo uinfo;
+    bool found = false;
+
+    const rgw_user uid(s->account_name);
+    if (uid.tenant.empty()) {
+      const rgw_user tenanted_uid(uid.id, uid.id);
+
+      if (ctl->user->get_info_by_uid(dpp, tenanted_uid, &uinfo, s->yield) >= 0) {
+        /* Succeeded. */
+        bucket_tenant = uinfo.user_id.tenant;
+        found = true;
+      }
+    }
+
+    if (!found && ctl->user->get_info_by_uid(dpp, uid, &uinfo, s->yield) < 0) {
+      throw -EPERM;
+    } else {
+      bucket_tenant = uinfo.user_id.tenant;
+    }
+  }
+
+  rgw_bucket b;
+  b.tenant = std::move(bucket_tenant);
+  b.name = std::move(bucket_name);
+
+  /* Need to get user info of bucket owner. */
+  RGWBucketInfo bucket_info;
+  RGWSI_MetaBackend_CtxParams bectx_params = RGWSI_MetaBackend_CtxParams_SObj(s->sysobj_ctx);
+  int ret = ctl->bucket->read_bucket_info(b, &bucket_info, y, dpp, RGWBucketCtl::BucketInstance::GetParams().set_bectx_params(bectx_params));
+  if (ret < 0) {
+    throw ret;
+  }
+
+  ldpp_dout(dpp, 20) << "temp url user (bucket owner): " << bucket_info.owner
+                 << dendl;
+
+  if (ctl->user->get_info_by_uid(dpp, bucket_info.owner, &owner_info, s->yield) < 0) {
+    throw -EPERM;
+  }
+}
+
+std::string TempURLEngine::convert_from_iso8601(std::string expires) const
+{
+  /* Swift's TempURL allows clients to send the expiration as ISO8601-
+   * compatible strings. Though, only plain UNIX timestamp are taken
+   * for the HMAC calculations. We need to make the conversion. */
+  struct tm date_t;
+  if (!parse_iso8601(expires.c_str(), &date_t, nullptr, true)) {
+    return expires;
+  } else {
+    return std::to_string(internal_timegm(&date_t));
+  }
+}
+
+bool TempURLEngine::is_expired(const std::string& expires) const
+{
+  string err;
+  const utime_t now = ceph_clock_now();
+  const uint64_t expiration = (uint64_t)strict_strtoll(expires.c_str(),
+                                                       10, &err);
+  if (!err.empty()) {
+    dout(5) << "failed to parse temp_url_expires: " << err << dendl;
+    return true;
+  }
+
+  if (expiration <= (uint64_t)now.sec()) {
+    dout(5) << "temp url expired: " << expiration << " <= " << now.sec() << dendl;
+    return true;
+  }
+
+  return false;
+}
+
+bool TempURLEngine::is_disallowed_header_present(const req_info& info) const
+{
+  static const auto headers = {
+    "HTTP_X_OBJECT_MANIFEST",
+  };
+
+  return std::any_of(std::begin(headers), std::end(headers),
+                     [&info](const char* header) {
+                       return info.env->exists(header);
+                     });
+}
+
+std::string extract_swift_subuser(const std::string& swift_user_name)
+{
+  size_t pos = swift_user_name.find(':');
+  if (std::string::npos == pos) {
+    return swift_user_name;
+  } else {
+    return swift_user_name.substr(pos + 1);
+  }
+}
+
+class TempURLEngine::SignatureHelper
+{
+private:
+  static constexpr uint32_t output_size =
+    CEPH_CRYPTO_HMACSHA1_DIGESTSIZE * 2 + 1;
+
+  unsigned char dest[CEPH_CRYPTO_HMACSHA1_DIGESTSIZE]; // 20
+  char dest_str[output_size];
+
+public:
+  SignatureHelper() = default;
+
+  const char* calc(const std::string& key,
+                   const std::string_view& method,
+                   const std::string_view& path,
+                   const std::string& expires) {
+
+    using ceph::crypto::HMACSHA1;
+    using UCHARPTR = const unsigned char*;
+
+    HMACSHA1 hmac((UCHARPTR) key.c_str(), key.size());
+    hmac.Update((UCHARPTR) method.data(), method.size());
+    hmac.Update((UCHARPTR) "\n", 1);
+    hmac.Update((UCHARPTR) expires.c_str(), expires.size());
+    hmac.Update((UCHARPTR) "\n", 1);
+    hmac.Update((UCHARPTR) path.data(), path.size());
+    hmac.Final(dest);
+
+    buf_to_hex((UCHARPTR) dest, sizeof(dest), dest_str);
+
+    return dest_str;
+  }
+
+  bool is_equal_to(const std::string& rhs) const {
+    /* never allow out-of-range exception */
+    if (rhs.size() < (output_size - 1)) {
+      return false;
+    }
+    return rhs.compare(0 /* pos */,  output_size, dest_str) == 0;
+  }
+
+}; /* TempURLEngine::SignatureHelper */
+
+class TempURLEngine::PrefixableSignatureHelper
+    : private TempURLEngine::SignatureHelper {
+  using base_t = SignatureHelper;
+
+  const std::string_view decoded_uri;
+  const std::string_view object_name;
+  std::string_view no_obj_uri;
+
+  const boost::optional<const std::string&> prefix;
+
+public:
+  PrefixableSignatureHelper(const std::string& _decoded_uri,
+	                    const std::string& object_name,
+                            const boost::optional<const std::string&> prefix)
+    : decoded_uri(_decoded_uri),
+      object_name(object_name),
+      prefix(prefix) {
+    /* Transform: v1/acct/cont/obj - > v1/acct/cont/
+     *
+     * NOTE(rzarzynski): we really want to substr() on std::string_view,
+     * not std::string. Otherwise we would end with no_obj_uri referencing
+     * a temporary. */
+    no_obj_uri = \
+      decoded_uri.substr(0, decoded_uri.length() - object_name.length());
+  }
+
+  const char* calc(const std::string& key,
+                   const std::string_view& method,
+                   const std::string_view& path,
+                   const std::string& expires) {
+    if (!prefix) {
+      return base_t::calc(key, method, path, expires);
+    } else {
+      const auto prefixed_path = \
+        string_cat_reserve("prefix:", no_obj_uri, *prefix);
+      return base_t::calc(key, method, prefixed_path, expires);
+    }
+  }
+
+  bool is_equal_to(const std::string& rhs) const {
+    bool is_auth_ok = base_t::is_equal_to(rhs);
+
+    if (prefix && is_auth_ok) {
+      const auto prefix_uri = string_cat_reserve(no_obj_uri, *prefix);
+      is_auth_ok = boost::algorithm::starts_with(decoded_uri, prefix_uri);
+    }
+
+    return is_auth_ok;
+  }
+}; /* TempURLEngine::PrefixableSignatureHelper */
+
+TempURLEngine::result_t
+TempURLEngine::authenticate(const DoutPrefixProvider* dpp, const req_state* const s, optional_yield y) const
+{
+  if (! is_applicable(s)) {
+    return result_t::deny();
+  }
+
+  /* NOTE(rzarzynski): RGWHTTPArgs::get(), in contrast to RGWEnv::get(),
+   * never returns nullptr. If the requested parameter is absent, we will
+   * get the empty string. */
+  const std::string& temp_url_sig = s->info.args.get("temp_url_sig");
+  const std::string& temp_url_expires = \
+    convert_from_iso8601(s->info.args.get("temp_url_expires"));
+
+  if (temp_url_sig.empty() || temp_url_expires.empty()) {
+    return result_t::deny();
+  }
+
+  /* Though, for prefixed tempurls we need to differentiate between empty
+   * prefix and lack of prefix. Empty prefix means allowance for whole
+   * container. */
+  const boost::optional<const std::string&> temp_url_prefix = \
+    s->info.args.get_optional("temp_url_prefix");
+
+  RGWUserInfo owner_info;
+  try {
+    get_owner_info(dpp, s, owner_info, y);
+  } catch (...) {
+    ldpp_dout(dpp, 5) << "cannot get user_info of account's owner" << dendl;
+    return result_t::reject();
+  }
+
+  if (owner_info.temp_url_keys.empty()) {
+    ldpp_dout(dpp, 5) << "user does not have temp url key set, aborting" << dendl;
+    return result_t::reject();
+  }
+
+  if (is_expired(temp_url_expires)) {
+    ldpp_dout(dpp, 5) << "temp url link expired" << dendl;
+    return result_t::reject(-EPERM);
+  }
+
+  if (is_disallowed_header_present(s->info)) {
+    ldout(cct, 5) << "temp url rejected due to disallowed header" << dendl;
+    return result_t::reject(-EINVAL);
+  }
+
+  /* We need to verify two paths because of compliance with Swift, Tempest
+   * and old versions of RadosGW. The second item will have the prefix
+   * of Swift API entry point removed. */
+
+  /* XXX can we search this ONCE? */
+  const size_t pos = g_conf()->rgw_swift_url_prefix.find_last_not_of('/') + 1;
+  const std::string_view ref_uri = s->decoded_uri;
+  const std::array<std::string_view, 2> allowed_paths = {
+    ref_uri,
+    ref_uri.substr(pos + 1)
+  };
+
+  /* Account owner calculates the signature also against a HTTP method. */
+  boost::container::static_vector<std::string_view, 3> allowed_methods;
+  if (strcmp("HEAD", s->info.method) == 0) {
+    /* HEAD requests are specially handled. */
+    /* TODO: after getting a newer boost (with static_vector supporting
+     * initializers lists), get back to the good notation:
+     *   allowed_methods = {"HEAD", "GET", "PUT" };
+     * Just for now let's use emplace_back to construct the vector. */
+    allowed_methods.emplace_back("HEAD");
+    allowed_methods.emplace_back("GET");
+    allowed_methods.emplace_back("PUT");
+  } else if (strlen(s->info.method) > 0) {
+    allowed_methods.emplace_back(s->info.method);
+  }
+
+  /* Need to try each combination of keys, allowed path and methods. */
+  PrefixableSignatureHelper sig_helper {
+    s->decoded_uri,
+    s->object->get_name(),
+    temp_url_prefix
+  };
+
+  for (const auto& kv : owner_info.temp_url_keys) {
+    const int temp_url_key_num = kv.first;
+    const string& temp_url_key = kv.second;
+
+    if (temp_url_key.empty()) {
+      continue;
+    }
+
+    for (const auto& path : allowed_paths) {
+      for (const auto& method : allowed_methods) {
+        const char* const local_sig = sig_helper.calc(temp_url_key, method,
+                                                      path, temp_url_expires);
+
+        ldpp_dout(dpp, 20) << "temp url signature [" << temp_url_key_num
+                          << "] (calculated): " << local_sig
+                          << dendl;
+
+        if (sig_helper.is_equal_to(temp_url_sig)) {
+          auto apl = apl_factory->create_apl_turl(cct, s, owner_info);
+          return result_t::grant(std::move(apl));
+        } else {
+          ldpp_dout(dpp,  5) << "temp url signature mismatch: " << local_sig
+                            << " != " << temp_url_sig  << dendl;
+        }
+      }
+    }
+  }
+
+  return result_t::reject();
+}
+
+
+/* External token */
+bool ExternalTokenEngine::is_applicable(const std::string& token) const noexcept
+{
+  if (token.empty()) {
+    return false;
+  } else if (g_conf()->rgw_swift_auth_url.empty()) {
+    return false;
+  } else {
+    return true;
+  }
+}
+
+ExternalTokenEngine::result_t
+ExternalTokenEngine::authenticate(const DoutPrefixProvider* dpp,
+                                  const std::string& token,
+                                  const req_state* const s, optional_yield y) const
+{
+  if (! is_applicable(token)) {
+    return result_t::deny();
+  }
+
+  std::string auth_url = g_conf()->rgw_swift_auth_url;
+  if (auth_url.back() != '/') {
+    auth_url.append("/");
+  }
+
+  auth_url.append("token");
+  char url_buf[auth_url.size() + 1 + token.length() + 1];
+  sprintf(url_buf, "%s/%s", auth_url.c_str(), token.c_str());
+
+  RGWHTTPHeadersCollector validator(cct, "GET", url_buf, { "X-Auth-Groups", "X-Auth-Ttl" });
+
+  ldpp_dout(dpp, 10) << "rgw_swift_validate_token url=" << url_buf << dendl;
+
+  int ret = validator.process(y);
+  if (ret < 0) {
+    throw ret;
+  }
+
+  std::string swift_user;
+  try {
+    std::vector<std::string> swift_groups;
+    get_str_vec(validator.get_header_value("X-Auth-Groups"),
+                ",", swift_groups);
+
+    if (0 == swift_groups.size()) {
+      return result_t::deny(-EPERM);
+    } else {
+      swift_user = std::move(swift_groups[0]);
+    }
+  } catch (const std::out_of_range&) {
+    /* The X-Auth-Groups header isn't present in the response. */
+    return result_t::deny(-EPERM);
+  }
+
+  if (swift_user.empty()) {
+    return result_t::deny(-EPERM);
+  }
+
+  ldpp_dout(dpp, 10) << "swift user=" << swift_user << dendl;
+
+  RGWUserInfo tmp_uinfo;
+  ret = ctl->user->get_info_by_swift(dpp, swift_user, &tmp_uinfo, s->yield);
+  if (ret < 0) {
+    ldpp_dout(dpp, 0) << "NOTICE: couldn't map swift user" << dendl;
+    throw ret;
+  }
+
+  auto apl = apl_factory->create_apl_local(cct, s, tmp_uinfo,
+                                           extract_swift_subuser(swift_user),
+                                           boost::none,
+                                           rgw::auth::LocalApplier::NO_ACCESS_KEY);
+  return result_t::grant(std::move(apl));
+}
+
+static int build_token(const string& swift_user,
+                       const string& key,
+                       const uint64_t nonce,
+                       const utime_t& expiration,
+                       bufferlist& bl)
+{
+  using ceph::encode;
+  encode(swift_user, bl);
+  encode(nonce, bl);
+  encode(expiration, bl);
+
+  bufferptr p(CEPH_CRYPTO_HMACSHA1_DIGESTSIZE);
+
+  char buf[bl.length() * 2 + 1];
+  buf_to_hex((const unsigned char *)bl.c_str(), bl.length(), buf);
+  dout(20) << "build_token token=" << buf << dendl;
+
+  char k[CEPH_CRYPTO_HMACSHA1_DIGESTSIZE];
+  // FIPS zeroization audit 20191116: this memset is not intended to
+  // wipe out a secret after use.
+  memset(k, 0, sizeof(k));
+  const char *s = key.c_str();
+  for (int i = 0; i < (int)key.length(); i++, s++) {
+    k[i % CEPH_CRYPTO_HMACSHA1_DIGESTSIZE] |= *s;
+  }
+  calc_hmac_sha1(k, sizeof(k), bl.c_str(), bl.length(), p.c_str());
+  ::ceph::crypto::zeroize_for_security(k, sizeof(k));
+
+  bl.append(p);
+
+  return 0;
+
+}
+
+static int encode_token(CephContext *cct, string& swift_user, string& key,
+			bufferlist& bl)
+{
+  const auto nonce = ceph::util::generate_random_number<uint64_t>();
+
+  utime_t expiration = ceph_clock_now();
+  expiration += cct->_conf->rgw_swift_token_expiration;
+
+  return build_token(swift_user, key, nonce, expiration, bl);
+}
+
+
+/* AUTH_rgwtk (signed token): engine */
+bool SignedTokenEngine::is_applicable(const std::string& token) const noexcept
+{
+  if (token.empty()) {
+    return false;
+  } else {
+    return token.compare(0, 10, "AUTH_rgwtk") == 0;
+  }
+}
+
+SignedTokenEngine::result_t
+SignedTokenEngine::authenticate(const DoutPrefixProvider* dpp,
+                                const std::string& token,
+                                const req_state* const s) const
+{
+  if (! is_applicable(token)) {
+    return result_t::deny(-EPERM);
+  }
+
+  /* Effective token string is the part after the prefix. */
+  const std::string etoken = token.substr(strlen("AUTH_rgwtk"));
+  const size_t etoken_len = etoken.length();
+
+  if (etoken_len & 1) {
+    ldpp_dout(dpp, 0) << "NOTICE: failed to verify token: odd token length="
+	          << etoken_len << dendl;
+    throw -EINVAL;
+  }
+
+  ceph::bufferptr p(etoken_len/2);
+  int ret = hex_to_buf(etoken.c_str(), p.c_str(), etoken_len);
+  if (ret < 0) {
+    throw ret;
+  }
+
+  ceph::bufferlist tok_bl;
+  tok_bl.append(p);
+
+  uint64_t nonce;
+  utime_t expiration;
+  std::string swift_user;
+
+  try {
+    auto iter = tok_bl.cbegin();
+
+    using ceph::decode;
+    decode(swift_user, iter);
+    decode(nonce, iter);
+    decode(expiration, iter);
+  } catch (buffer::error& err) {
+    ldpp_dout(dpp, 0) << "NOTICE: failed to decode token" << dendl;
+    throw -EINVAL;
+  }
+
+  const utime_t now = ceph_clock_now();
+  if (expiration < now) {
+    ldpp_dout(dpp, 0) << "NOTICE: old timed out token was used now=" << now
+	          << " token.expiration=" << expiration
+                  << dendl;
+    return result_t::deny(-EPERM);
+  }
+
+  RGWUserInfo user_info;
+  ret = ctl->user->get_info_by_swift(dpp, swift_user, &user_info, s->yield);
+  if (ret < 0) {
+    throw ret;
+  }
+
+  ldpp_dout(dpp, 10) << "swift_user=" << swift_user << dendl;
+
+  const auto siter = user_info.swift_keys.find(swift_user);
+  if (siter == std::end(user_info.swift_keys)) {
+    return result_t::deny(-EPERM);
+  }
+
+  const auto swift_key = siter->second;
+
+  bufferlist local_tok_bl;
+  ret = build_token(swift_user, swift_key.key, nonce, expiration, local_tok_bl);
+  if (ret < 0) {
+    throw ret;
+  }
+
+  if (local_tok_bl.length() != tok_bl.length()) {
+    ldpp_dout(dpp, 0) << "NOTICE: tokens length mismatch:"
+                  << " tok_bl.length()=" << tok_bl.length()
+	          << " local_tok_bl.length()=" << local_tok_bl.length()
+                  << dendl;
+    return result_t::deny(-EPERM);
+  }
+
+  if (memcmp(local_tok_bl.c_str(), tok_bl.c_str(),
+             local_tok_bl.length()) != 0) {
+    char buf[local_tok_bl.length() * 2 + 1];
+
+    buf_to_hex(reinterpret_cast<const unsigned char *>(local_tok_bl.c_str()),
+               local_tok_bl.length(), buf);
+
+    ldpp_dout(dpp, 0) << "NOTICE: tokens mismatch tok=" << buf << dendl;
+    return result_t::deny(-EPERM);
+  }
+
+  auto apl = apl_factory->create_apl_local(cct, s, user_info,
+                                           extract_swift_subuser(swift_user),
+                                           boost::none, rgw::auth::LocalApplier::NO_ACCESS_KEY);
+  return result_t::grant(std::move(apl));
+}
+
+} /* namespace swift */
+} /* namespace auth */
+} /* namespace rgw */
+
+
+void RGW_SWIFT_Auth_Get::execute(optional_yield y)
+{
+  int ret = -EPERM;
+
+  const char *key = s->info.env->get("HTTP_X_AUTH_KEY");
+  const char *user = s->info.env->get("HTTP_X_AUTH_USER");
+
+  s->prot_flags |= RGW_REST_SWIFT;
+
+  string user_str;
+  RGWUserInfo info;
+  bufferlist bl;
+  RGWAccessKey *swift_key;
+  map<string, RGWAccessKey>::iterator siter;
+
+  string swift_url = g_conf()->rgw_swift_url;
+  string swift_prefix = g_conf()->rgw_swift_url_prefix;
+  string tenant_path;
+
+  /*
+   * We did not allow an empty Swift prefix before, but we want it now.
+   * So, we take rgw_swift_url_prefix = "/" to yield the empty prefix.
+   * The rgw_swift_url_prefix = "" is the default and yields "/swift"
+   * in a backwards-compatible way.
+   */
+  if (swift_prefix.size() == 0) {
+    swift_prefix = DEFAULT_SWIFT_PREFIX;
+  } else if (swift_prefix == "/") {
+    swift_prefix.clear();
+  } else {
+    if (swift_prefix[0] != '/') {
+      swift_prefix.insert(0, "/");
+    }
+  }
+
+  if (swift_url.size() == 0) {
+    bool add_port = false;
+    const char *server_port = s->info.env->get("SERVER_PORT_SECURE");
+    const char *protocol;
+    if (server_port) {
+      add_port = (strcmp(server_port, "443") != 0);
+      protocol = "https";
+    } else {
+      server_port = s->info.env->get("SERVER_PORT");
+      add_port = (strcmp(server_port, "80") != 0);
+      protocol = "http";
+    }
+    const char *host = s->info.env->get("HTTP_HOST");
+    if (!host) {
+      dout(0) << "NOTICE: server is misconfigured, missing rgw_swift_url_prefix or rgw_swift_url, HTTP_HOST is not set" << dendl;
+      ret = -EINVAL;
+      goto done;
+    }
+    swift_url = protocol;
+    swift_url.append("://");
+    swift_url.append(host);
+    if (add_port && !strchr(host, ':')) {
+      swift_url.append(":");
+      swift_url.append(server_port);
+    }
+  }
+
+  if (!key || !user)
+    goto done;
+
+  user_str = user;
+
+  if ((ret = store->ctl()->user->get_info_by_swift(s, user_str, &info, s->yield)) < 0)
+  {
+    ret = -EACCES;
+    goto done;
+  }
+
+  siter = info.swift_keys.find(user_str);
+  if (siter == info.swift_keys.end()) {
+    ret = -EPERM;
+    goto done;
+  }
+  swift_key = &siter->second;
+
+  if (swift_key->key.compare(key) != 0) {
+    dout(0) << "NOTICE: RGW_SWIFT_Auth_Get::execute(): bad swift key" << dendl;
+    ret = -EPERM;
+    goto done;
+  }
+
+  if (!g_conf()->rgw_swift_tenant_name.empty()) {
+    tenant_path = "/AUTH_";
+    tenant_path.append(g_conf()->rgw_swift_tenant_name);
+  } else if (g_conf()->rgw_swift_account_in_url) {
+    tenant_path = "/AUTH_";
+    tenant_path.append(info.user_id.to_str());
+  }
+
+  dump_header(s, "X-Storage-Url", swift_url + swift_prefix + "/v1" +
+              tenant_path);
+
+  using rgw::auth::swift::encode_token;
+  if ((ret = encode_token(s->cct, swift_key->id, swift_key->key, bl)) < 0)
+    goto done;
+
+  {
+    static constexpr size_t PREFIX_LEN = sizeof("AUTH_rgwtk") - 1;
+    char token_val[PREFIX_LEN + bl.length() * 2 + 1];
+
+    snprintf(token_val, PREFIX_LEN + 1, "AUTH_rgwtk");
+    buf_to_hex((const unsigned char *)bl.c_str(), bl.length(),
+	       token_val + PREFIX_LEN);
+
+    dump_header(s, "X-Storage-Token", token_val);
+    dump_header(s, "X-Auth-Token", token_val);
+  }
+
+  ret = STATUS_NO_CONTENT;
+
+done:
+  set_req_state_err(s, ret);
+  dump_errno(s);
+  end_header(s);
+}
+
+int RGWHandler_SWIFT_Auth::init(rgw::sal::RGWRadosStore *store, struct req_state *state,
+				rgw::io::BasicClient *cio)
+{
+  state->dialect = "swift-auth";
+  state->formatter = new JSONFormatter;
+  state->format = RGW_FORMAT_JSON;
+
+  return RGWHandler::init(store, state, cio);
+}
+
+int RGWHandler_SWIFT_Auth::authorize(const DoutPrefixProvider *dpp, optional_yield)
+{
+  return 0;
+}
+
+RGWOp *RGWHandler_SWIFT_Auth::op_get()
+{
+  return new RGW_SWIFT_Auth_Get;
+}
+