X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=src%2Fceph%2Fsrc%2Frgw%2Frgw_rest_s3.h;fp=src%2Fceph%2Fsrc%2Frgw%2Frgw_rest_s3.h;h=d0aa098fa1b82fc74533aec9fb4f51fdfd5a2b19;hb=812ff6ca9fcd3e629e49d4328905f33eee8ca3f5;hp=0000000000000000000000000000000000000000;hpb=15280273faafb77777eab341909a3f495cf248d9;p=stor4nfv.git

diff --git a/src/ceph/src/rgw/rgw_rest_s3.h b/src/ceph/src/rgw/rgw_rest_s3.h
new file mode 100644
index 0000000..d0aa098
--- /dev/null
+++ b/src/ceph/src/rgw/rgw_rest_s3.h
@@ -0,0 +1,934 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_RGW_REST_S3_H
+
+#define CEPH_RGW_REST_S3_H
+#define TIME_BUF_SIZE 128
+
+#include <mutex>
+
+#include <boost/utility/string_view.hpp>
+#include <boost/container/static_vector.hpp>
+
+#include "common/backport14.h"
+#include "common/sstring.hh"
+#include "rgw_op.h"
+#include "rgw_rest.h"
+#include "rgw_http_errors.h"
+#include "rgw_acl_s3.h"
+#include "rgw_policy_s3.h"
+#include "rgw_lc_s3.h"
+#include "rgw_keystone.h"
+#include "rgw_rest_conn.h"
+#include "rgw_ldap.h"
+#include "rgw_rest.h"
+
+#include "rgw_token.h"
+#include "include/assert.h"
+
+#include "rgw_auth.h"
+#include "rgw_auth_filters.h"
+
+#define RGW_AUTH_GRACE_MINS 15
+
+struct rgw_http_error {
+  int http_ret;
+  const char *s3_code;
+};
+
+void rgw_get_errno_s3(struct rgw_http_error *e, int err_no);
+
+class RGWGetObj_ObjStore_S3 : public RGWGetObj_ObjStore
+{
+protected:
+  // Serving a custom error page from an object is really a 200 response with
+  // just the status line altered.
+  int custom_http_ret = 0;
+  std::map<std::string, std::string> crypt_http_responses;
+public:
+  RGWGetObj_ObjStore_S3() {}
+  ~RGWGetObj_ObjStore_S3() override {}
+
+  int get_params() override;
+  int send_response_data_error() override;
+  int send_response_data(bufferlist& bl, off_t ofs, off_t len) override;
+  void set_custom_http_response(int http_ret) { custom_http_ret = http_ret; }
+  int get_decrypt_filter(std::unique_ptr<RGWGetDataCB>* filter,
+                         RGWGetDataCB* cb,
+                         bufferlist* manifest_bl) override;
+};
+
+class RGWGetObjTags_ObjStore_S3 : public RGWGetObjTags_ObjStore
+{
+  bufferlist tags_bl;
+public:
+  RGWGetObjTags_ObjStore_S3() {}
+  ~RGWGetObjTags_ObjStore_S3() {}
+
+  void send_response_data(bufferlist &bl) override;
+};
+
+class RGWPutObjTags_ObjStore_S3 : public RGWPutObjTags_ObjStore
+{
+public:
+  RGWPutObjTags_ObjStore_S3() {}
+  ~RGWPutObjTags_ObjStore_S3() {}
+
+  int get_params() override;
+  void send_response() override;
+};
+
+class RGWDeleteObjTags_ObjStore_S3 : public RGWDeleteObjTags
+{
+public:
+  ~RGWDeleteObjTags_ObjStore_S3() override {}
+  void send_response() override;
+};
+
+class RGWListBuckets_ObjStore_S3 : public RGWListBuckets_ObjStore {
+public:
+  RGWListBuckets_ObjStore_S3() {}
+  ~RGWListBuckets_ObjStore_S3() override {}
+
+  int get_params() override {
+    limit = -1; /* no limit */
+    return 0;
+  }
+  void send_response_begin(bool has_buckets) override;
+  void send_response_data(RGWUserBuckets& buckets) override;
+  void send_response_end() override;
+};
+
+class RGWGetUsage_ObjStore_S3 : public RGWGetUsage_ObjStore {
+public:
+  RGWGetUsage_ObjStore_S3() {}
+  ~RGWGetUsage_ObjStore_S3() override {}
+
+  int get_params() override ;
+  void send_response() override;
+};
+
+class RGWListBucket_ObjStore_S3 : public RGWListBucket_ObjStore {
+  bool objs_container;
+public:
+  RGWListBucket_ObjStore_S3() : objs_container(false) {
+    default_max = 1000;
+  }
+  ~RGWListBucket_ObjStore_S3() override {}
+
+  int get_params() override;
+  void send_response() override;
+  void send_versioned_response();
+};
+
+class RGWGetBucketLogging_ObjStore_S3 : public RGWGetBucketLogging {
+public:
+  RGWGetBucketLogging_ObjStore_S3() {}
+  ~RGWGetBucketLogging_ObjStore_S3() override {}
+
+  void send_response() override;
+};
+
+class RGWGetBucketLocation_ObjStore_S3 : public RGWGetBucketLocation {
+public:
+  RGWGetBucketLocation_ObjStore_S3() {}
+  ~RGWGetBucketLocation_ObjStore_S3() override {}
+
+  void send_response() override;
+};
+
+class RGWGetBucketVersioning_ObjStore_S3 : public RGWGetBucketVersioning {
+public:
+  RGWGetBucketVersioning_ObjStore_S3() {}
+  ~RGWGetBucketVersioning_ObjStore_S3() override {}
+
+  void send_response() override;
+};
+
+class RGWSetBucketVersioning_ObjStore_S3 : public RGWSetBucketVersioning {
+public:
+  RGWSetBucketVersioning_ObjStore_S3() {}
+  ~RGWSetBucketVersioning_ObjStore_S3() override {}
+
+  int get_params() override;
+  void send_response() override;
+};
+
+class RGWGetBucketWebsite_ObjStore_S3 : public RGWGetBucketWebsite {
+public:
+  RGWGetBucketWebsite_ObjStore_S3() {}
+  ~RGWGetBucketWebsite_ObjStore_S3() override {}
+
+  void send_response() override;
+};
+
+class RGWSetBucketWebsite_ObjStore_S3 : public RGWSetBucketWebsite {
+public:
+  RGWSetBucketWebsite_ObjStore_S3() {}
+  ~RGWSetBucketWebsite_ObjStore_S3() override {}
+
+  int get_params() override;
+  void send_response() override;
+};
+
+class RGWDeleteBucketWebsite_ObjStore_S3 : public RGWDeleteBucketWebsite {
+public:
+  RGWDeleteBucketWebsite_ObjStore_S3() {}
+  ~RGWDeleteBucketWebsite_ObjStore_S3() override {}
+
+  void send_response() override;
+};
+
+class RGWStatBucket_ObjStore_S3 : public RGWStatBucket_ObjStore {
+public:
+  RGWStatBucket_ObjStore_S3() {}
+  ~RGWStatBucket_ObjStore_S3() override {}
+
+  void send_response() override;
+};
+
+class RGWCreateBucket_ObjStore_S3 : public RGWCreateBucket_ObjStore {
+public:
+  RGWCreateBucket_ObjStore_S3() {}
+  ~RGWCreateBucket_ObjStore_S3() override {}
+
+  int get_params() override;
+  void send_response() override;
+};
+
+class RGWDeleteBucket_ObjStore_S3 : public RGWDeleteBucket_ObjStore {
+public:
+  RGWDeleteBucket_ObjStore_S3() {}
+  ~RGWDeleteBucket_ObjStore_S3() override {}
+
+  void send_response() override;
+};
+
+class RGWPutObj_ObjStore_S3 : public RGWPutObj_ObjStore {
+private:
+  std::map<std::string, std::string> crypt_http_responses;
+
+public:
+  RGWPutObj_ObjStore_S3() {}
+  ~RGWPutObj_ObjStore_S3() override {}
+
+  int get_params() override;
+  int get_data(bufferlist& bl) override;
+  void send_response() override;
+
+  int get_encrypt_filter(std::unique_ptr<RGWPutObjDataProcessor>* filter,
+                         RGWPutObjDataProcessor* cb) override;
+  int get_decrypt_filter(std::unique_ptr<RGWGetDataCB>* filter,
+                         RGWGetDataCB* cb,
+                         map<string, bufferlist>& attrs,
+                         bufferlist* manifest_bl) override;
+};
+
+class RGWPostObj_ObjStore_S3 : public RGWPostObj_ObjStore {
+  parts_collection_t parts;
+  std::string filename;
+  std::string content_type;
+  RGWPolicyEnv env;
+  RGWPolicy post_policy;
+  map<string, string> crypt_http_responses;
+
+  const rgw::auth::StrategyRegistry* auth_registry_ptr = nullptr;
+
+  int get_policy();
+  int get_tags();
+  void rebuild_key(string& key);
+
+  std::string get_current_filename() const override;
+  std::string get_current_content_type() const override;
+
+public:
+  RGWPostObj_ObjStore_S3() {}
+  ~RGWPostObj_ObjStore_S3() override {}
+
+  int verify_requester(const rgw::auth::StrategyRegistry& auth_registry) {
+    auth_registry_ptr = &auth_registry;
+    return RGWPostObj_ObjStore::verify_requester(auth_registry);
+  }
+
+  int get_params() override;
+  int complete_get_params();
+
+  void send_response() override;
+  int get_data(ceph::bufferlist& bl, bool& again) override;
+  int get_encrypt_filter(std::unique_ptr<RGWPutObjDataProcessor>* filter,
+                         RGWPutObjDataProcessor* cb) override;
+};
+
+class RGWDeleteObj_ObjStore_S3 : public RGWDeleteObj_ObjStore {
+public:
+  RGWDeleteObj_ObjStore_S3() {}
+  ~RGWDeleteObj_ObjStore_S3() override {}
+
+  int get_params() override;
+  void send_response() override;
+};
+
+class RGWCopyObj_ObjStore_S3 : public RGWCopyObj_ObjStore {
+  bool sent_header;
+public:
+  RGWCopyObj_ObjStore_S3() : sent_header(false) {}
+  ~RGWCopyObj_ObjStore_S3() override {}
+
+  int init_dest_policy() override;
+  int get_params() override;
+  void send_partial_response(off_t ofs) override;
+  void send_response() override;
+};
+
+class RGWGetACLs_ObjStore_S3 : public RGWGetACLs_ObjStore {
+public:
+  RGWGetACLs_ObjStore_S3() {}
+  ~RGWGetACLs_ObjStore_S3() override {}
+
+  void send_response() override;
+};
+
+class RGWPutACLs_ObjStore_S3 : public RGWPutACLs_ObjStore {
+public:
+  RGWPutACLs_ObjStore_S3() {}
+  ~RGWPutACLs_ObjStore_S3() override {}
+
+  int get_policy_from_state(RGWRados *store, struct req_state *s, stringstream& ss) override;
+  void send_response() override;
+  int get_params() override;
+};
+
+class RGWGetLC_ObjStore_S3 : public RGWGetLC_ObjStore {
+protected:
+  RGWLifecycleConfiguration_S3  config;
+public:
+  RGWGetLC_ObjStore_S3() {}
+  ~RGWGetLC_ObjStore_S3() override {}
+  void execute() override;
+
+ void send_response() override;
+};
+
+class RGWPutLC_ObjStore_S3 : public RGWPutLC_ObjStore {
+public:
+  RGWPutLC_ObjStore_S3() {}
+  ~RGWPutLC_ObjStore_S3() override {}
+  
+ void send_response() override;
+};
+
+class RGWDeleteLC_ObjStore_S3 : public RGWDeleteLC_ObjStore {
+public:
+  RGWDeleteLC_ObjStore_S3() {}
+  ~RGWDeleteLC_ObjStore_S3() override {}
+  
+ void send_response() override;
+};
+
+class RGWGetCORS_ObjStore_S3 : public RGWGetCORS_ObjStore {
+public:
+  RGWGetCORS_ObjStore_S3() {}
+  ~RGWGetCORS_ObjStore_S3() override {}
+
+  void send_response() override;
+};
+
+class RGWPutCORS_ObjStore_S3 : public RGWPutCORS_ObjStore {
+public:
+  RGWPutCORS_ObjStore_S3() {}
+  ~RGWPutCORS_ObjStore_S3() override {}
+
+  int get_params() override;
+  void send_response() override;
+};
+
+class RGWDeleteCORS_ObjStore_S3 : public RGWDeleteCORS_ObjStore {
+public:
+  RGWDeleteCORS_ObjStore_S3() {}
+  ~RGWDeleteCORS_ObjStore_S3() override {}
+
+  void send_response() override;
+};
+
+class RGWOptionsCORS_ObjStore_S3 : public RGWOptionsCORS_ObjStore {
+public:
+  RGWOptionsCORS_ObjStore_S3() {}
+  ~RGWOptionsCORS_ObjStore_S3() override {}
+
+  void send_response() override;
+};
+
+class RGWGetRequestPayment_ObjStore_S3 : public RGWGetRequestPayment {
+public:
+  RGWGetRequestPayment_ObjStore_S3() {}
+  ~RGWGetRequestPayment_ObjStore_S3() override {}
+
+  void send_response() override;
+};
+
+class RGWSetRequestPayment_ObjStore_S3 : public RGWSetRequestPayment {
+public:
+  RGWSetRequestPayment_ObjStore_S3() {}
+  ~RGWSetRequestPayment_ObjStore_S3() override {}
+
+  int get_params() override;
+  void send_response() override;
+};
+
+class RGWInitMultipart_ObjStore_S3 : public RGWInitMultipart_ObjStore {
+private:
+  std::map<std::string, std::string> crypt_http_responses;
+public:
+  RGWInitMultipart_ObjStore_S3() {}
+  ~RGWInitMultipart_ObjStore_S3() override {}
+
+  int get_params() override;
+  void send_response() override;
+  int prepare_encryption(map<string, bufferlist>& attrs) override;
+};
+
+class RGWCompleteMultipart_ObjStore_S3 : public RGWCompleteMultipart_ObjStore {
+public:
+  RGWCompleteMultipart_ObjStore_S3() {}
+  ~RGWCompleteMultipart_ObjStore_S3() override {}
+
+  int get_params() override;
+  void send_response() override;
+};
+
+class RGWAbortMultipart_ObjStore_S3 : public RGWAbortMultipart_ObjStore {
+public:
+  RGWAbortMultipart_ObjStore_S3() {}
+  ~RGWAbortMultipart_ObjStore_S3() override {}
+
+  void send_response() override;
+};
+
+class RGWListMultipart_ObjStore_S3 : public RGWListMultipart_ObjStore {
+public:
+  RGWListMultipart_ObjStore_S3() {}
+  ~RGWListMultipart_ObjStore_S3() override {}
+
+  void send_response() override;
+};
+
+class RGWListBucketMultiparts_ObjStore_S3 : public RGWListBucketMultiparts_ObjStore {
+public:
+  RGWListBucketMultiparts_ObjStore_S3() {
+    default_max = 1000;
+  }
+  ~RGWListBucketMultiparts_ObjStore_S3() override {}
+
+  void send_response() override;
+};
+
+class RGWDeleteMultiObj_ObjStore_S3 : public RGWDeleteMultiObj_ObjStore {
+public:
+  RGWDeleteMultiObj_ObjStore_S3() {}
+  ~RGWDeleteMultiObj_ObjStore_S3() override {}
+
+  int get_params() override;
+  void send_status() override;
+  void begin_response() override;
+  void send_partial_response(rgw_obj_key& key, bool delete_marker,
+                             const string& marker_version_id, int ret) override;
+  void end_response() override;
+};
+
+class RGWGetObjLayout_ObjStore_S3 : public RGWGetObjLayout {
+public:
+  RGWGetObjLayout_ObjStore_S3() {}
+  ~RGWGetObjLayout_ObjStore_S3() {}
+
+  void send_response();
+};
+
+class RGWConfigBucketMetaSearch_ObjStore_S3 : public RGWConfigBucketMetaSearch {
+public:
+  RGWConfigBucketMetaSearch_ObjStore_S3() {}
+  ~RGWConfigBucketMetaSearch_ObjStore_S3() {}
+
+  int get_params() override;
+  void send_response() override;
+};
+
+class RGWGetBucketMetaSearch_ObjStore_S3 : public RGWGetBucketMetaSearch {
+public:
+  RGWGetBucketMetaSearch_ObjStore_S3() {}
+  ~RGWGetBucketMetaSearch_ObjStore_S3() {}
+
+  void send_response() override;
+};
+
+class RGWDelBucketMetaSearch_ObjStore_S3 : public RGWDelBucketMetaSearch {
+public:
+  RGWDelBucketMetaSearch_ObjStore_S3() {}
+  ~RGWDelBucketMetaSearch_ObjStore_S3() {}
+
+  void send_response() override;
+};
+
+class RGW_Auth_S3 {
+public:
+  static int authorize(RGWRados *store,
+                       const rgw::auth::StrategyRegistry& auth_registry,
+                       struct req_state *s);
+};
+
+class RGWHandler_Auth_S3 : public RGWHandler_REST {
+  friend class RGWRESTMgr_S3;
+
+  const rgw::auth::StrategyRegistry& auth_registry;
+
+public:
+  RGWHandler_Auth_S3(const rgw::auth::StrategyRegistry& auth_registry)
+    : RGWHandler_REST(),
+      auth_registry(auth_registry) {
+  }
+  ~RGWHandler_Auth_S3() override = default;
+
+  static int validate_bucket_name(const string& bucket);
+  static int validate_object_name(const string& bucket);
+
+  int init(RGWRados *store,
+           struct req_state *s,
+           rgw::io::BasicClient *cio) override;
+  int authorize() override {
+    return RGW_Auth_S3::authorize(store, auth_registry, s);
+  }
+  int postauth_init() override { return 0; }
+};
+
+class RGWHandler_REST_S3 : public RGWHandler_REST {
+  friend class RGWRESTMgr_S3;
+
+  const rgw::auth::StrategyRegistry& auth_registry;
+public:
+  static int init_from_header(struct req_state *s, int default_formatter, bool configurable_format);
+
+  RGWHandler_REST_S3(const rgw::auth::StrategyRegistry& auth_registry)
+    : RGWHandler_REST(),
+      auth_registry(auth_registry) {
+  }
+  ~RGWHandler_REST_S3() override = default;
+
+  int init(RGWRados *store,
+           struct req_state *s,
+           rgw::io::BasicClient *cio) override;
+  int authorize() override {
+    return RGW_Auth_S3::authorize(store, auth_registry, s);
+  }
+  int postauth_init() override;
+};
+
+class RGWHandler_REST_Service_S3 : public RGWHandler_REST_S3 {
+protected:
+    bool is_usage_op() {
+    return s->info.args.exists("usage");
+  }
+  RGWOp *op_get() override;
+  RGWOp *op_head() override;
+  RGWOp *op_post() override;
+public:
+  using RGWHandler_REST_S3::RGWHandler_REST_S3;
+  ~RGWHandler_REST_Service_S3() override = default;
+};
+
+class RGWHandler_REST_Bucket_S3 : public RGWHandler_REST_S3 {
+protected:
+  bool is_acl_op() {
+    return s->info.args.exists("acl");
+  }
+  bool is_cors_op() {
+      return s->info.args.exists("cors");
+  }
+  bool is_lc_op() {
+      return s->info.args.exists("lifecycle");
+  }
+  bool is_obj_update_op() override {
+    return is_acl_op() || is_cors_op();
+  }
+  bool is_request_payment_op() {
+    return s->info.args.exists("requestPayment");
+  }
+  bool is_policy_op() {
+    return s->info.args.exists("policy");
+  }
+  RGWOp *get_obj_op(bool get_data);
+
+  RGWOp *op_get() override;
+  RGWOp *op_head() override;
+  RGWOp *op_put() override;
+  RGWOp *op_delete() override;
+  RGWOp *op_post() override;
+  RGWOp *op_options() override;
+public:
+  using RGWHandler_REST_S3::RGWHandler_REST_S3;
+  ~RGWHandler_REST_Bucket_S3() override = default;
+};
+
+class RGWHandler_REST_Obj_S3 : public RGWHandler_REST_S3 {
+protected:
+  bool is_acl_op() {
+    return s->info.args.exists("acl");
+  }
+  bool is_cors_op() {
+      return s->info.args.exists("cors");
+  }
+  bool is_tagging_op() {
+    return s->info.args.exists("tagging");
+  }
+  bool is_obj_update_op() override {
+    return is_acl_op() || is_tagging_op() ;
+  }
+  RGWOp *get_obj_op(bool get_data);
+
+  RGWOp *op_get() override;
+  RGWOp *op_head() override;
+  RGWOp *op_put() override;
+  RGWOp *op_delete() override;
+  RGWOp *op_post() override;
+  RGWOp *op_options() override;
+public:
+  using RGWHandler_REST_S3::RGWHandler_REST_S3;
+  ~RGWHandler_REST_Obj_S3() override = default;
+};
+
+class RGWRESTMgr_S3 : public RGWRESTMgr {
+private:
+  bool enable_s3website;
+public:
+  explicit RGWRESTMgr_S3(bool enable_s3website = false)
+    : enable_s3website(enable_s3website) {
+  }
+
+  ~RGWRESTMgr_S3() override = default;
+
+  RGWHandler_REST *get_handler(struct req_state* s,
+                               const rgw::auth::StrategyRegistry& auth_registry,
+                               const std::string& frontend_prefix) override;
+};
+
+class RGWHandler_REST_Obj_S3Website;
+
+static inline bool looks_like_ip_address(const char *bucket)
+{
+  int num_periods = 0;
+  bool expect_period = false;
+  for (const char *b = bucket; *b; ++b) {
+    if (*b == '.') {
+      if (!expect_period)
+	return false;
+      ++num_periods;
+      if (num_periods > 3)
+	return false;
+      expect_period = false;
+    }
+    else if (isdigit(*b)) {
+      expect_period = true;
+    }
+    else {
+      return false;
+    }
+  }
+  return (num_periods == 3);
+}
+
+static inline int valid_s3_object_name(const string& name) {
+  if (name.size() > 1024) {
+    return -ERR_INVALID_OBJECT_NAME;
+  }
+  if (check_utf8(name.c_str(), name.size())) {
+    return -ERR_INVALID_OBJECT_NAME;
+  }
+  return 0;
+}
+
+static inline int valid_s3_bucket_name(const string& name, bool relaxed=false)
+{
+  // This function enforces Amazon's spec for bucket names.
+  // (The requirements, not the recommendations.)
+  int len = name.size();
+  if (len < 3) {
+    // Name too short
+    return -ERR_INVALID_BUCKET_NAME;
+  } else if (len > 255) {
+    // Name too long
+    return -ERR_INVALID_BUCKET_NAME;
+  }
+
+  // bucket names must start with a number, letter, or underscore
+  if (!(isalpha(name[0]) || isdigit(name[0]))) {
+    if (!relaxed)
+      return -ERR_INVALID_BUCKET_NAME;
+    else if (!(name[0] == '_' || name[0] == '.' || name[0] == '-'))
+      return -ERR_INVALID_BUCKET_NAME;
+  }
+
+  for (const char *s = name.c_str(); *s; ++s) {
+    char c = *s;
+    if (isdigit(c) || (c == '.'))
+      continue;
+    if (isalpha(c))
+      continue;
+    if ((c == '-') || (c == '_'))
+      continue;
+    // Invalid character
+    return -ERR_INVALID_BUCKET_NAME;
+  }
+
+  if (looks_like_ip_address(name.c_str()))
+    return -ERR_INVALID_BUCKET_NAME;
+
+  return 0;
+}
+
+
+namespace rgw {
+namespace auth {
+namespace s3 {
+
+class AWSEngine : public rgw::auth::Engine {
+public:
+  class VersionAbstractor {
+    static constexpr size_t DIGEST_SIZE_V2 = CEPH_CRYPTO_HMACSHA1_DIGESTSIZE;
+    static constexpr size_t DIGEST_SIZE_V4 = CEPH_CRYPTO_HMACSHA256_DIGESTSIZE;
+
+    /* Knowing the signature max size allows us to employ the sstring, and thus
+     * avoid dynamic allocations. The multiplier comes from representing digest
+     * in the base64-encoded form. */
+    static constexpr size_t SIGNATURE_MAX_SIZE = \
+      ceph::max(DIGEST_SIZE_V2, DIGEST_SIZE_V4) * 2 + sizeof('\0');
+
+  public:
+    virtual ~VersionAbstractor() {};
+
+    using access_key_id_t = boost::string_view;
+    using client_signature_t = boost::string_view;
+    using server_signature_t = basic_sstring<char, uint16_t, SIGNATURE_MAX_SIZE>;
+    using string_to_sign_t = std::string;
+
+    /* Transformation for crafting the AWS signature at server side which is
+     * used later to compare with the user-provided one. The methodology for
+     * doing that depends on AWS auth version. */
+    using signature_factory_t = \
+      std::function<server_signature_t(CephContext* cct,
+                                       const std::string& secret_key,
+                                       const string_to_sign_t& string_to_sign)>;
+
+    /* Return an instance of Completer for verifying the payload's fingerprint
+     * if necessary. Otherwise caller gets nullptr. Caller may provide secret
+     * key */
+    using completer_factory_t = \
+      std::function<rgw::auth::Completer::cmplptr_t(
+        const boost::optional<std::string>& secret_key)>;
+
+    struct auth_data_t {
+      access_key_id_t access_key_id;
+      client_signature_t client_signature;
+      string_to_sign_t string_to_sign;
+      signature_factory_t signature_factory;
+      completer_factory_t completer_factory;
+    };
+
+    virtual auth_data_t get_auth_data(const req_state* s) const = 0;
+  };
+
+protected:
+  CephContext* cct;
+  const VersionAbstractor& ver_abstractor;
+
+  AWSEngine(CephContext* const cct, const VersionAbstractor& ver_abstractor)
+    : cct(cct),
+      ver_abstractor(ver_abstractor) {
+  }
+
+  using result_t = rgw::auth::Engine::result_t;
+  using string_to_sign_t = VersionAbstractor::string_to_sign_t;
+  using signature_factory_t = VersionAbstractor::signature_factory_t;
+  using completer_factory_t = VersionAbstractor::completer_factory_t;
+
+  /* TODO(rzarzynski): clean up. We've too many input parameter hee. Also
+   * the signature get_auth_data() of VersionAbstractor is too complicated.
+   * Replace these thing with a simple, dedicated structure. */
+  virtual result_t authenticate(const boost::string_view& access_key_id,
+                                const boost::string_view& signature,
+                                const string_to_sign_t& string_to_sign,
+                                const signature_factory_t& signature_factory,
+                                const completer_factory_t& completer_factory,
+                                const req_state* s) const = 0;
+
+public:
+  result_t authenticate(const req_state* const s) const final;
+};
+
+
+class AWSGeneralAbstractor : public AWSEngine::VersionAbstractor {
+  CephContext* const cct;
+
+  bool is_time_skew_ok(const utime_t& header_time,
+                       const bool qsr) const;
+
+  virtual boost::optional<std::string>
+  get_v4_canonical_headers(const req_info& info,
+                           const boost::string_view& signedheaders,
+                           const bool using_qs) const;
+
+  auth_data_t get_auth_data_v2(const req_state* s) const;
+  auth_data_t get_auth_data_v4(const req_state* s, bool using_qs) const;
+
+public:
+  AWSGeneralAbstractor(CephContext* const cct)
+    : cct(cct) {
+  }
+
+  auth_data_t get_auth_data(const req_state* s) const override;
+};
+
+class AWSGeneralBoto2Abstractor : public AWSGeneralAbstractor {
+  boost::optional<std::string>
+  get_v4_canonical_headers(const req_info& info,
+                           const boost::string_view& signedheaders,
+                           const bool using_qs) const override;
+
+public:
+  using AWSGeneralAbstractor::AWSGeneralAbstractor;
+};
+
+class AWSBrowserUploadAbstractor : public AWSEngine::VersionAbstractor {
+  static std::string to_string(ceph::bufferlist bl) {
+    return std::string(bl.c_str(),
+                       static_cast<std::string::size_type>(bl.length()));
+  }
+
+  auth_data_t get_auth_data_v2(const req_state* s) const;
+  auth_data_t get_auth_data_v4(const req_state* s) const;
+
+public:
+  AWSBrowserUploadAbstractor(CephContext*) {
+  }
+
+  auth_data_t get_auth_data(const req_state* s) const override;
+};
+
+
+class LDAPEngine : public AWSEngine {
+  static rgw::LDAPHelper* ldh;
+  static std::mutex mtx;
+
+  static void init(CephContext* const cct);
+
+  using acl_strategy_t = rgw::auth::RemoteApplier::acl_strategy_t;
+  using auth_info_t = rgw::auth::RemoteApplier::AuthInfo;
+  using result_t = rgw::auth::Engine::result_t;
+
+protected:
+  RGWRados* const store;
+  const rgw::auth::RemoteApplier::Factory* const apl_factory;
+
+  acl_strategy_t get_acl_strategy() const;
+  auth_info_t get_creds_info(const rgw::RGWToken& token) const noexcept;
+
+  result_t authenticate(const boost::string_view& access_key_id,
+                        const boost::string_view& signature,
+                        const string_to_sign_t& string_to_sign,
+                        const signature_factory_t&,
+                        const completer_factory_t& completer_factory,
+                        const req_state* s) const override;
+public:
+  LDAPEngine(CephContext* const cct,
+             RGWRados* const store,
+             const VersionAbstractor& ver_abstractor,
+             const rgw::auth::RemoteApplier::Factory* const apl_factory)
+    : AWSEngine(cct, ver_abstractor),
+      store(store),
+      apl_factory(apl_factory) {
+    init(cct);
+  }
+
+  using AWSEngine::authenticate;
+
+  const char* get_name() const noexcept override {
+    return "rgw::auth::s3::LDAPEngine";
+  }
+};
+
+
+class LocalEngine : public AWSEngine {
+  RGWRados* const store;
+  const rgw::auth::LocalApplier::Factory* const apl_factory;
+
+  result_t authenticate(const boost::string_view& access_key_id,
+                        const boost::string_view& signature,
+                        const string_to_sign_t& string_to_sign,
+                        const signature_factory_t& signature_factory,
+                        const completer_factory_t& completer_factory,
+                        const req_state* s) const override;
+public:
+  LocalEngine(CephContext* const cct,
+              RGWRados* const store,
+              const VersionAbstractor& ver_abstractor,
+              const rgw::auth::LocalApplier::Factory* const apl_factory)
+    : AWSEngine(cct, ver_abstractor),
+      store(store),
+      apl_factory(apl_factory) {
+  }
+
+  using AWSEngine::authenticate;
+
+  const char* get_name() const noexcept override {
+    return "rgw::auth::s3::LocalEngine";
+  }
+};
+
+
+class S3AnonymousEngine : public rgw::auth::AnonymousEngine {
+  bool is_applicable(const req_state* s) const noexcept override;
+
+public:
+  /* Let's reuse the parent class' constructor. */
+  using rgw::auth::AnonymousEngine::AnonymousEngine;
+
+  const char* get_name() const noexcept override {
+    return "rgw::auth::s3::S3AnonymousEngine";
+  }
+};
+
+
+class S3AuthFactory : public rgw::auth::RemoteApplier::Factory,
+                      public rgw::auth::LocalApplier::Factory {
+  typedef rgw::auth::IdentityApplier::aplptr_t aplptr_t;
+  RGWRados* const store;
+
+public:
+  S3AuthFactory(RGWRados* const store)
+    : store(store) {
+  }
+
+  aplptr_t create_apl_remote(CephContext* const cct,
+                             const req_state* const s,
+                             rgw::auth::RemoteApplier::acl_strategy_t&& acl_alg,
+                             const rgw::auth::RemoteApplier::AuthInfo info
+                            ) const override {
+    return aplptr_t(
+      new rgw::auth::RemoteApplier(cct, store, std::move(acl_alg), info,
+                                   cct->_conf->rgw_keystone_implicit_tenants));
+  }
+
+  aplptr_t create_apl_local(CephContext* const cct,
+                            const req_state* const s,
+                            const RGWUserInfo& user_info,
+                            const std::string& subuser) const override {
+      return aplptr_t(
+        new rgw::auth::LocalApplier(cct, user_info, subuser));
+  }
+};
+
+
+} /* namespace s3 */
+} /* namespace auth */
+} /* namespace rgw */
+
+
+#endif /* CEPH_RGW_REST_S3_H */