+++ /dev/null
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-
-#include <array>
-
-#include <boost/utility/string_view.hpp>
-#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 "auth/Crypto.h"
-
-#include "rgw_client_io.h"
-#include "rgw_http_client.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(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.name, fenc);
- s->content_disp.fallback = "attachment; filename=\"" + fenc + "\"";
- }
-
- ldout(s->cct, 20) << "finished applying changes to req_state for TempURL: "
- << " content_disp override " << s->content_disp.override
- << " content_disp fallback " << s->content_disp.fallback
- << dendl;
-
-}
-
-/* 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 req_state* const s,
- RGWUserInfo& owner_info) 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 (rgw_get_user_info_by_uid(store, tenanted_uid, uinfo) >= 0) {
- /* Succeeded. */
- bucket_tenant = uinfo.user_id.tenant;
- found = true;
- }
- }
-
- if (!found && rgw_get_user_info_by_uid(store, uid, uinfo) < 0) {
- throw -EPERM;
- } else {
- bucket_tenant = uinfo.user_id.tenant;
- }
- }
-
- /* Need to get user info of bucket owner. */
- RGWBucketInfo bucket_info;
- int ret = store->get_bucket_info(*static_cast<RGWObjectCtx *>(s->obj_ctx),
- bucket_tenant, bucket_name,
- bucket_info, nullptr);
- if (ret < 0) {
- throw ret;
- }
-
- ldout(cct, 20) << "temp url user (bucket owner): " << bucket_info.owner
- << dendl;
-
- if (rgw_get_user_info_by_uid(store, bucket_info.owner, owner_info) < 0) {
- throw -EPERM;
- }
-}
-
-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;
-}
-
-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 boost::string_view& method,
- const boost::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 boost::string_view decoded_uri;
- const boost::string_view object_name;
- boost::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 boost::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 boost::string_view& method,
- const boost::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 req_state* const s) 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 = 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(s, owner_info);
- } catch (...) {
- ldout(cct, 5) << "cannot get user_info of account's owner" << dendl;
- return result_t::reject();
- }
-
- if (owner_info.temp_url_keys.empty()) {
- ldout(cct, 5) << "user does not have temp url key set, aborting" << dendl;
- return result_t::reject();
- }
-
- if (is_expired(temp_url_expires)) {
- ldout(cct, 5) << "temp url link expired" << dendl;
- return result_t::reject(-EPERM);
- }
-
- /* 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 boost::string_view ref_uri = s->decoded_uri;
- const std::array<boost::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<boost::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.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);
-
- ldout(s->cct, 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 {
- ldout(s->cct, 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 std::string& token,
- const req_state* const s) 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, { "X-Auth-Groups", "X-Auth-Ttl" });
-
- ldout(cct, 10) << "rgw_swift_validate_token url=" << url_buf << dendl;
-
- int ret = validator.process(url_buf);
- 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 (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);
- }
-
- ldout(cct, 10) << "swift user=" << swift_user << dendl;
-
- RGWUserInfo tmp_uinfo;
- ret = rgw_get_user_info_by_swift(store, swift_user, tmp_uinfo);
- if (ret < 0) {
- ldout(cct, 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));
- 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)
-{
- ::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];
- 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());
-
- bl.append(p);
-
- return 0;
-
-}
-
-static int encode_token(CephContext *cct, string& swift_user, string& key,
- bufferlist& bl)
-{
- uint64_t nonce;
-
- int ret = get_random_bytes((char *)&nonce, sizeof(nonce));
- if (ret < 0)
- return ret;
-
- 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 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) {
- ldout(cct, 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 {
- /*const*/ auto iter = tok_bl.begin();
-
- ::decode(swift_user, iter);
- ::decode(nonce, iter);
- ::decode(expiration, iter);
- } catch (buffer::error& err) {
- ldout(cct, 0) << "NOTICE: failed to decode token" << dendl;
- throw -EINVAL;
- }
-
- const utime_t now = ceph_clock_now();
- if (expiration < now) {
- ldout(cct, 0) << "NOTICE: old timed out token was used now=" << now
- << " token.expiration=" << expiration
- << dendl;
- return result_t::deny(-EPERM);
- }
-
- RGWUserInfo user_info;
- ret = rgw_get_user_info_by_swift(store, swift_user, user_info);
- if (ret < 0) {
- throw ret;
- }
-
- ldout(cct, 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()) {
- ldout(cct, 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);
-
- ldout(cct, 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));
- return result_t::grant(std::move(apl));
-}
-
-} /* namespace swift */
-} /* namespace auth */
-} /* namespace rgw */
-
-
-void RGW_SWIFT_Auth_Get::execute()
-{
- 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 = rgw_get_user_info_by_swift(store, user_str, info)) < 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(RGWRados *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()
-{
- return 0;
-}
-
-RGWOp *RGWHandler_SWIFT_Auth::op_get()
-{
- return new RGW_SWIFT_Auth_Get;
-}
-
Code Review / stor4nfv.git / blobdiff