1 /*
2 // Copyright (c) 2018 Intel Corporation
3 //
4 // Licensed under the Apache License, Version 2.0 (the "License");
5 // you may not use this file except in compliance with the License.
6 // You may obtain a copy of the License at
7 //
8 //      http://www.apache.org/licenses/LICENSE-2.0
9 //
10 // Unless required by applicable law or agreed to in writing, software
11 // distributed under the License is distributed on an "AS IS" BASIS,
12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 // See the License for the specific language governing permissions and
14 // limitations under the License.
15 */
16 #include "user_mgmt.hpp"
17 
18 #include "apphandler.hpp"
19 #include "channel_layer.hpp"
20 #include "channel_mgmt.hpp"
21 
22 #include <security/pam_appl.h>
23 #include <sys/stat.h>
24 #include <unistd.h>
25 
26 #include <boost/interprocess/sync/named_recursive_mutex.hpp>
27 #include <boost/interprocess/sync/scoped_lock.hpp>
28 #include <cerrno>
29 #include <fstream>
30 #include <ipmid/types.hpp>
31 #include <nlohmann/json.hpp>
32 #include <phosphor-logging/elog-errors.hpp>
33 #include <phosphor-logging/log.hpp>
34 #include <regex>
35 #include <sdbusplus/bus/match.hpp>
36 #include <sdbusplus/server/object.hpp>
37 #include <variant>
38 #include <xyz/openbmc_project/Common/error.hpp>
39 #include <xyz/openbmc_project/User/Common/error.hpp>
40 
41 namespace ipmi
42 {
43 
44 // TODO: Move D-Bus & Object Manager related stuff, to common files
45 // D-Bus property related
46 static constexpr const char* dBusPropertiesInterface =
47     "org.freedesktop.DBus.Properties";
48 static constexpr const char* getAllPropertiesMethod = "GetAll";
49 static constexpr const char* propertiesChangedSignal = "PropertiesChanged";
50 static constexpr const char* setPropertiesMethod = "Set";
51 
52 // Object Manager related
53 static constexpr const char* dBusObjManager =
54     "org.freedesktop.DBus.ObjectManager";
55 static constexpr const char* getManagedObjectsMethod = "GetManagedObjects";
56 // Object Manager signals
57 static constexpr const char* intfAddedSignal = "InterfacesAdded";
58 static constexpr const char* intfRemovedSignal = "InterfacesRemoved";
59 
60 // Object Mapper related
61 static constexpr const char* objMapperService =
62     "xyz.openbmc_project.ObjectMapper";
63 static constexpr const char* objMapperPath =
64     "/xyz/openbmc_project/object_mapper";
65 static constexpr const char* objMapperInterface =
66     "xyz.openbmc_project.ObjectMapper";
67 static constexpr const char* getSubTreeMethod = "GetSubTree";
68 static constexpr const char* getObjectMethod = "GetObject";
69 
70 static constexpr const char* ipmiUserMutex = "ipmi_usr_mutex";
71 static constexpr const char* ipmiMutexCleanupLockFile =
72     "/var/lib/ipmi/ipmi_usr_mutex_cleanup";
73 static constexpr const char* ipmiUserSignalLockFile =
74     "/var/lib/ipmi/ipmi_usr_signal_mutex";
75 static constexpr const char* ipmiUserDataFile = "/var/lib/ipmi/ipmi_user.json";
76 static constexpr const char* ipmiGrpName = "ipmi";
77 static constexpr size_t privNoAccess = 0xF;
78 static constexpr size_t privMask = 0xF;
79 
80 // User manager related
81 static constexpr const char* userMgrObjBasePath = "/xyz/openbmc_project/user";
82 static constexpr const char* userObjBasePath = "/xyz/openbmc_project/user";
83 static constexpr const char* userMgrInterface =
84     "xyz.openbmc_project.User.Manager";
85 static constexpr const char* usersInterface =
86     "xyz.openbmc_project.User.Attributes";
87 static constexpr const char* deleteUserInterface =
88     "xyz.openbmc_project.Object.Delete";
89 
90 static constexpr const char* createUserMethod = "CreateUser";
91 static constexpr const char* deleteUserMethod = "Delete";
92 static constexpr const char* renameUserMethod = "RenameUser";
93 // User manager signal memebers
94 static constexpr const char* userRenamedSignal = "UserRenamed";
95 // Mgr interface properties
96 static constexpr const char* allPrivProperty = "AllPrivileges";
97 static constexpr const char* allGrpProperty = "AllGroups";
98 // User interface properties
99 static constexpr const char* userPrivProperty = "UserPrivilege";
100 static constexpr const char* userGrpProperty = "UserGroups";
101 static constexpr const char* userEnabledProperty = "UserEnabled";
102 
103 static std::array<std::string, (PRIVILEGE_OEM + 1)> ipmiPrivIndex = {
104     "priv-reserved", // PRIVILEGE_RESERVED - 0
105     "priv-callback", // PRIVILEGE_CALLBACK - 1
106     "priv-user",     // PRIVILEGE_USER - 2
107     "priv-operator", // PRIVILEGE_OPERATOR - 3
108     "priv-admin",    // PRIVILEGE_ADMIN - 4
109     "priv-custom"    // PRIVILEGE_OEM - 5
110 };
111 
112 using namespace phosphor::logging;
113 using Json = nlohmann::json;
114 
115 using PrivAndGroupType = std::variant<std::string, std::vector<std::string>>;
116 
117 using NoResource =
118     sdbusplus::xyz::openbmc_project::User::Common::Error::NoResource;
119 
120 using InternalFailure =
121     sdbusplus::xyz::openbmc_project::Common::Error::InternalFailure;
122 
123 std::unique_ptr<sdbusplus::bus::match_t> userUpdatedSignal
124     __attribute__((init_priority(101)));
125 std::unique_ptr<sdbusplus::bus::match_t> userMgrRenamedSignal
126     __attribute__((init_priority(101)));
127 std::unique_ptr<sdbusplus::bus::match_t> userPropertiesSignal
128     __attribute__((init_priority(101)));
129 
130 // TODO:  Below code can be removed once it is moved to common layer libmiscutil
131 std::string getUserService(sdbusplus::bus::bus& bus, const std::string& intf,
132                            const std::string& path)
133 {
134     auto mapperCall = bus.new_method_call(objMapperService, objMapperPath,
135                                           objMapperInterface, getObjectMethod);
136 
137     mapperCall.append(path);
138     mapperCall.append(std::vector<std::string>({intf}));
139 
140     auto mapperResponseMsg = bus.call(mapperCall);
141 
142     std::map<std::string, std::vector<std::string>> mapperResponse;
143     mapperResponseMsg.read(mapperResponse);
144 
145     if (mapperResponse.begin() == mapperResponse.end())
146     {
147         throw sdbusplus::exception::SdBusError(
148             -EIO, "ERROR in reading the mapper response");
149     }
150 
151     return mapperResponse.begin()->first;
152 }
153 
154 void setDbusProperty(sdbusplus::bus::bus& bus, const std::string& service,
155                      const std::string& objPath, const std::string& interface,
156                      const std::string& property,
157                      const DbusUserPropVariant& value)
158 {
159     try
160     {
161         auto method =
162             bus.new_method_call(service.c_str(), objPath.c_str(),
163                                 dBusPropertiesInterface, setPropertiesMethod);
164         method.append(interface, property, value);
165         bus.call(method);
166     }
167     catch (const sdbusplus::exception::exception& e)
168     {
169         log<level::ERR>("Failed to set property",
170                         entry("PROPERTY=%s", property.c_str()),
171                         entry("PATH=%s", objPath.c_str()),
172                         entry("INTERFACE=%s", interface.c_str()));
173         throw;
174     }
175 }
176 
177 static std::string getUserServiceName()
178 {
179     static sdbusplus::bus::bus bus(ipmid_get_sd_bus_connection());
180     static std::string userMgmtService;
181     if (userMgmtService.empty())
182     {
183         try
184         {
185             userMgmtService =
186                 ipmi::getUserService(bus, userMgrInterface, userMgrObjBasePath);
187         }
188         catch (const sdbusplus::exception::exception& e)
189         {
190             userMgmtService.clear();
191         }
192     }
193     return userMgmtService;
194 }
195 
196 UserAccess& getUserAccessObject()
197 {
198     static UserAccess userAccess;
199     return userAccess;
200 }
201 
202 int getUserNameFromPath(const std::string& path, std::string& userName)
203 {
204     sdbusplus::message::object_path objPath(path);
205     userName.assign(objPath.filename());
206     return 0;
207 }
208 
209 void userUpdateHelper(UserAccess& usrAccess, const UserUpdateEvent& userEvent,
210                       const std::string& userName, const std::string& priv,
211                       const bool& enabled, const std::string& newUserName)
212 {
213     UsersTbl* userData = usrAccess.getUsersTblPtr();
214     if (userEvent == UserUpdateEvent::userCreated)
215     {
216         if (usrAccess.addUserEntry(userName, priv, enabled) == false)
217         {
218             return;
219         }
220     }
221     else
222     {
223         // user index 0 is reserved, starts with 1
224         size_t usrIndex = 1;
225         for (; usrIndex <= ipmiMaxUsers; ++usrIndex)
226         {
227             std::string curName(
228                 reinterpret_cast<char*>(userData->user[usrIndex].userName), 0,
229                 ipmiMaxUserName);
230             if (userName == curName)
231             {
232                 break; // found the entry
233             }
234         }
235         if (usrIndex > ipmiMaxUsers)
236         {
237             log<level::DEBUG>("User not found for signal",
238                               entry("USER_NAME=%s", userName.c_str()),
239                               entry("USER_EVENT=%d", userEvent));
240             return;
241         }
242         switch (userEvent)
243         {
244             case UserUpdateEvent::userDeleted:
245             {
246                 usrAccess.deleteUserIndex(usrIndex);
247                 break;
248             }
249             case UserUpdateEvent::userPrivUpdated:
250             {
251                 uint8_t userPriv =
252                     static_cast<uint8_t>(
253                         UserAccess::convertToIPMIPrivilege(priv)) &
254                     privMask;
255                 // Update all channels privileges, only if it is not equivalent
256                 // to getUsrMgmtSyncIndex()
257                 if (userData->user[usrIndex]
258                         .userPrivAccess[UserAccess::getUsrMgmtSyncIndex()]
259                         .privilege != userPriv)
260                 {
261                     for (size_t chIndex = 0; chIndex < ipmiMaxChannels;
262                          ++chIndex)
263                     {
264                         userData->user[usrIndex]
265                             .userPrivAccess[chIndex]
266                             .privilege = userPriv;
267                     }
268                 }
269                 break;
270             }
271             case UserUpdateEvent::userRenamed:
272             {
273                 std::fill(
274                     static_cast<uint8_t*>(userData->user[usrIndex].userName),
275                     static_cast<uint8_t*>(userData->user[usrIndex].userName) +
276                         sizeof(userData->user[usrIndex].userName),
277                     0);
278                 std::strncpy(
279                     reinterpret_cast<char*>(userData->user[usrIndex].userName),
280                     newUserName.c_str(), ipmiMaxUserName);
281                 ipmiRenameUserEntryPassword(userName, newUserName);
282                 break;
283             }
284             case UserUpdateEvent::userStateUpdated:
285             {
286                 userData->user[usrIndex].userEnabled = enabled;
287                 break;
288             }
289             default:
290             {
291                 log<level::ERR>("Unhandled user event",
292                                 entry("USER_EVENT=%d", userEvent));
293                 return;
294             }
295         }
296     }
297     usrAccess.writeUserData();
298     log<level::DEBUG>("User event handled successfully",
299                       entry("USER_NAME=%s", userName.c_str()),
300                       entry("USER_EVENT=%d", userEvent));
301 
302     return;
303 }
304 
305 void userUpdatedSignalHandler(UserAccess& usrAccess,
306                               sdbusplus::message::message& msg)
307 {
308     static sdbusplus::bus::bus bus(ipmid_get_sd_bus_connection());
309     std::string signal = msg.get_member();
310     std::string userName, priv, newUserName;
311     std::vector<std::string> groups;
312     bool enabled = false;
313     UserUpdateEvent userEvent = UserUpdateEvent::reservedEvent;
314     if (signal == intfAddedSignal)
315     {
316         DbusUserObjPath objPath;
317         DbusUserObjValue objValue;
318         msg.read(objPath, objValue);
319         getUserNameFromPath(objPath.str, userName);
320         if (usrAccess.getUserObjProperties(objValue, groups, priv, enabled) !=
321             0)
322         {
323             return;
324         }
325         if (std::find(groups.begin(), groups.end(), ipmiGrpName) ==
326             groups.end())
327         {
328             return;
329         }
330         userEvent = UserUpdateEvent::userCreated;
331     }
332     else if (signal == intfRemovedSignal)
333     {
334         DbusUserObjPath objPath;
335         std::vector<std::string> interfaces;
336         msg.read(objPath, interfaces);
337         getUserNameFromPath(objPath.str, userName);
338         userEvent = UserUpdateEvent::userDeleted;
339     }
340     else if (signal == userRenamedSignal)
341     {
342         msg.read(userName, newUserName);
343         userEvent = UserUpdateEvent::userRenamed;
344     }
345     else if (signal == propertiesChangedSignal)
346     {
347         getUserNameFromPath(msg.get_path(), userName);
348     }
349     else
350     {
351         log<level::ERR>("Unknown user update signal",
352                         entry("SIGNAL=%s", signal.c_str()));
353         return;
354     }
355 
356     if (signal.empty() || userName.empty() ||
357         (signal == userRenamedSignal && newUserName.empty()))
358     {
359         log<level::ERR>("Invalid inputs received");
360         return;
361     }
362 
363     boost::interprocess::scoped_lock<boost::interprocess::named_recursive_mutex>
364         userLock{*(usrAccess.userMutex)};
365     usrAccess.checkAndReloadUserData();
366 
367     if (signal == propertiesChangedSignal)
368     {
369         std::string intfName;
370         DbusUserObjProperties chProperties;
371         msg.read(intfName, chProperties); // skip reading 3rd argument.
372         for (const auto& prop : chProperties)
373         {
374             userEvent = UserUpdateEvent::reservedEvent;
375             std::string member = prop.first;
376             if (member == userPrivProperty)
377             {
378                 priv = std::get<std::string>(prop.second);
379                 userEvent = UserUpdateEvent::userPrivUpdated;
380             }
381             else if (member == userGrpProperty)
382             {
383                 groups = std::get<std::vector<std::string>>(prop.second);
384                 userEvent = UserUpdateEvent::userGrpUpdated;
385             }
386             else if (member == userEnabledProperty)
387             {
388                 enabled = std::get<bool>(prop.second);
389                 userEvent = UserUpdateEvent::userStateUpdated;
390             }
391             // Process based on event type.
392             if (userEvent == UserUpdateEvent::userGrpUpdated)
393             {
394                 if (std::find(groups.begin(), groups.end(), ipmiGrpName) ==
395                     groups.end())
396                 {
397                     // remove user from ipmi user list.
398                     userUpdateHelper(usrAccess, UserUpdateEvent::userDeleted,
399                                      userName, priv, enabled, newUserName);
400                 }
401                 else
402                 {
403                     DbusUserObjProperties properties;
404                     try
405                     {
406                         auto method = bus.new_method_call(
407                             getUserServiceName().c_str(), msg.get_path(),
408                             dBusPropertiesInterface, getAllPropertiesMethod);
409                         method.append(usersInterface);
410                         auto reply = bus.call(method);
411                         reply.read(properties);
412                     }
413                     catch (const sdbusplus::exception::exception& e)
414                     {
415                         log<level::DEBUG>(
416                             "Failed to excute method",
417                             entry("METHOD=%s", getAllPropertiesMethod),
418                             entry("PATH=%s", msg.get_path()));
419                         return;
420                     }
421                     usrAccess.getUserProperties(properties, groups, priv,
422                                                 enabled);
423                     // add user to ipmi user list.
424                     userUpdateHelper(usrAccess, UserUpdateEvent::userCreated,
425                                      userName, priv, enabled, newUserName);
426                 }
427             }
428             else if (userEvent != UserUpdateEvent::reservedEvent)
429             {
430                 userUpdateHelper(usrAccess, userEvent, userName, priv, enabled,
431                                  newUserName);
432             }
433         }
434     }
435     else if (userEvent != UserUpdateEvent::reservedEvent)
436     {
437         userUpdateHelper(usrAccess, userEvent, userName, priv, enabled,
438                          newUserName);
439     }
440     return;
441 }
442 
443 UserAccess::~UserAccess()
444 {
445     if (signalHndlrObject)
446     {
447         userUpdatedSignal.reset();
448         userMgrRenamedSignal.reset();
449         userPropertiesSignal.reset();
450         sigHndlrLock.unlock();
451     }
452 }
453 
454 UserAccess::UserAccess() : bus(ipmid_get_sd_bus_connection())
455 {
456     std::ofstream mutexCleanUpFile;
457     mutexCleanUpFile.open(ipmiMutexCleanupLockFile,
458                           std::ofstream::out | std::ofstream::app);
459     if (!mutexCleanUpFile.good())
460     {
461         log<level::DEBUG>("Unable to open mutex cleanup file");
462         return;
463     }
464     mutexCleanUpFile.close();
465     mutexCleanupLock = boost::interprocess::file_lock(ipmiMutexCleanupLockFile);
466     if (mutexCleanupLock.try_lock())
467     {
468         boost::interprocess::named_recursive_mutex::remove(ipmiUserMutex);
469     }
470     mutexCleanupLock.lock_sharable();
471     userMutex = std::make_unique<boost::interprocess::named_recursive_mutex>(
472         boost::interprocess::open_or_create, ipmiUserMutex);
473 
474     cacheUserDataFile();
475     getSystemPrivAndGroups();
476 }
477 
478 UserInfo* UserAccess::getUserInfo(const uint8_t userId)
479 {
480     checkAndReloadUserData();
481     return &usersTbl.user[userId];
482 }
483 
484 void UserAccess::setUserInfo(const uint8_t userId, UserInfo* userInfo)
485 {
486     checkAndReloadUserData();
487     std::copy(reinterpret_cast<uint8_t*>(userInfo),
488               reinterpret_cast<uint8_t*>(userInfo) + sizeof(*userInfo),
489               reinterpret_cast<uint8_t*>(&usersTbl.user[userId]));
490     writeUserData();
491 }
492 
493 bool UserAccess::isValidChannel(const uint8_t chNum)
494 {
495     return (chNum < ipmiMaxChannels);
496 }
497 
498 bool UserAccess::isValidUserId(const uint8_t userId)
499 {
500     return ((userId <= ipmiMaxUsers) && (userId != reservedUserId));
501 }
502 
503 bool UserAccess::isValidPrivilege(const uint8_t priv)
504 {
505     // Callback privilege is deprecated in OpenBMC
506     return (isValidPrivLimit(priv) || priv == privNoAccess);
507 }
508 
509 uint8_t UserAccess::getUsrMgmtSyncIndex()
510 {
511     // Identify the IPMI channel used to assign system user privilege levels
512     // in phosphor-user-manager. The default value is IPMI Channel 1. To
513     // assign a different channel add:
514     //      "is_management_nic" : true
515     // into the channel_config.json file describing the assignment of the IPMI
516     // channels. It is only necessary to add the string above to ONE record in
517     // the channel_config.json file. All other records will be automatically
518     // assigned a "false" value.
519     return getChannelConfigObject().getManagementNICID();
520 }
521 
522 CommandPrivilege UserAccess::convertToIPMIPrivilege(const std::string& value)
523 {
524     auto iter = std::find(ipmiPrivIndex.begin(), ipmiPrivIndex.end(), value);
525     if (iter == ipmiPrivIndex.end())
526     {
527         if (value == "")
528         {
529             return static_cast<CommandPrivilege>(privNoAccess);
530         }
531         log<level::ERR>("Error in converting to IPMI privilege",
532                         entry("PRIV=%s", value.c_str()));
533         throw std::out_of_range("Out of range - convertToIPMIPrivilege");
534     }
535     else
536     {
537         return static_cast<CommandPrivilege>(
538             std::distance(ipmiPrivIndex.begin(), iter));
539     }
540 }
541 
542 std::string UserAccess::convertToSystemPrivilege(const CommandPrivilege& value)
543 {
544     if (value == static_cast<CommandPrivilege>(privNoAccess))
545     {
546         return "";
547     }
548     try
549     {
550         return ipmiPrivIndex.at(value);
551     }
552     catch (const std::out_of_range& e)
553     {
554         log<level::ERR>("Error in converting to system privilege",
555                         entry("PRIV=%d", static_cast<uint8_t>(value)));
556         throw std::out_of_range("Out of range - convertToSystemPrivilege");
557     }
558 }
559 
560 bool UserAccess::isValidUserName(const std::string& userName)
561 {
562     if (userName.empty())
563     {
564         log<level::ERR>("userName is empty");
565         return false;
566     }
567     if (!std::regex_match(userName.c_str(),
568                           std::regex("[a-zA-z_][a-zA-Z_0-9]*")))
569     {
570         log<level::ERR>("Unsupported characters in user name");
571         return false;
572     }
573     if (userName == "root")
574     {
575         log<level::ERR>("Invalid user name - root");
576         return false;
577     }
578     std::map<DbusUserObjPath, DbusUserObjValue> properties;
579     try
580     {
581         auto method = bus.new_method_call(getUserServiceName().c_str(),
582                                           userMgrObjBasePath, dBusObjManager,
583                                           getManagedObjectsMethod);
584         auto reply = bus.call(method);
585         reply.read(properties);
586     }
587     catch (const sdbusplus::exception::exception& e)
588     {
589         log<level::ERR>("Failed to excute method",
590                         entry("METHOD=%s", getSubTreeMethod),
591                         entry("PATH=%s", userMgrObjBasePath));
592         return false;
593     }
594 
595     sdbusplus::message::object_path tempUserPath(userObjBasePath);
596     tempUserPath /= userName;
597     std::string usersPath(tempUserPath);
598 
599     if (properties.find(usersPath) != properties.end())
600     {
601         log<level::DEBUG>("User name already exists",
602                           entry("USER_NAME=%s", userName.c_str()));
603         return false;
604     }
605 
606     return true;
607 }
608 
609 /** @brief Information exchanged by pam module and application.
610  *
611  *  @param[in] numMsg - length of the array of pointers,msg.
612  *
613  *  @param[in] msg -  pointer  to an array of pointers to pam_message structure
614  *
615  *  @param[out] resp - struct pam response array
616  *
617  *  @param[in] appdataPtr - member of pam_conv structure
618  *
619  *  @return the response in pam response structure.
620  */
621 
622 static int pamFunctionConversation(int numMsg, const struct pam_message** msg,
623                                    struct pam_response** resp, void* appdataPtr)
624 {
625     if (appdataPtr == nullptr)
626     {
627         return PAM_CONV_ERR;
628     }
629 
630     if (numMsg <= 0 || numMsg >= PAM_MAX_NUM_MSG)
631     {
632         return PAM_CONV_ERR;
633     }
634 
635     for (int i = 0; i < numMsg; ++i)
636     {
637         /* Ignore all PAM messages except prompting for hidden input */
638         if (msg[i]->msg_style != PAM_PROMPT_ECHO_OFF)
639         {
640             continue;
641         }
642 
643         /* Assume PAM is only prompting for the password as hidden input */
644         /* Allocate memory only when PAM_PROMPT_ECHO_OFF is encounterred */
645 
646         char* appPass = reinterpret_cast<char*>(appdataPtr);
647         size_t appPassSize = std::strlen(appPass);
648 
649         if (appPassSize >= PAM_MAX_RESP_SIZE)
650         {
651             return PAM_CONV_ERR;
652         }
653 
654         char* pass = reinterpret_cast<char*>(malloc(appPassSize + 1));
655         if (pass == nullptr)
656         {
657             return PAM_BUF_ERR;
658         }
659 
660         void* ptr =
661             calloc(static_cast<size_t>(numMsg), sizeof(struct pam_response));
662         if (ptr == nullptr)
663         {
664             free(pass);
665             return PAM_BUF_ERR;
666         }
667 
668         std::strncpy(pass, appPass, appPassSize + 1);
669 
670         *resp = reinterpret_cast<pam_response*>(ptr);
671         resp[i]->resp = pass;
672 
673         return PAM_SUCCESS;
674     }
675 
676     return PAM_CONV_ERR;
677 }
678 
679 /** @brief Updating the PAM password
680  *
681  *  @param[in] username - username in string
682  *
683  *  @param[in] password  - new password in string
684  *
685  *  @return status
686  */
687 
688 int pamUpdatePasswd(const char* username, const char* password)
689 {
690     const struct pam_conv localConversation = {pamFunctionConversation,
691                                                const_cast<char*>(password)};
692     pam_handle_t* localAuthHandle = NULL; // this gets set by pam_start
693 
694     int retval =
695         pam_start("passwd", username, &localConversation, &localAuthHandle);
696 
697     if (retval != PAM_SUCCESS)
698     {
699         return retval;
700     }
701 
702     retval = pam_chauthtok(localAuthHandle, PAM_SILENT);
703     if (retval != PAM_SUCCESS)
704     {
705         pam_end(localAuthHandle, retval);
706         return retval;
707     }
708 
709     return pam_end(localAuthHandle, PAM_SUCCESS);
710 }
711 
712 bool pamUserCheckAuthenticate(std::string_view username,
713                               std::string_view password)
714 {
715     const struct pam_conv localConversation = {
716         pamFunctionConversation, const_cast<char*>(password.data())};
717 
718     pam_handle_t* localAuthHandle = NULL; // this gets set by pam_start
719 
720     if (pam_start("dropbear", username.data(), &localConversation,
721                   &localAuthHandle) != PAM_SUCCESS)
722     {
723         log<level::ERR>("User Authentication Failure");
724         return false;
725     }
726 
727     int retval = pam_authenticate(localAuthHandle,
728                                   PAM_SILENT | PAM_DISALLOW_NULL_AUTHTOK);
729 
730     if (retval != PAM_SUCCESS)
731     {
732         log<level::DEBUG>("pam_authenticate returned failure",
733                           entry("ERROR=%d", retval));
734 
735         pam_end(localAuthHandle, retval);
736         return false;
737     }
738 
739     if (pam_acct_mgmt(localAuthHandle, PAM_DISALLOW_NULL_AUTHTOK) !=
740         PAM_SUCCESS)
741     {
742         pam_end(localAuthHandle, PAM_SUCCESS);
743         return false;
744     }
745 
746     if (pam_end(localAuthHandle, PAM_SUCCESS) != PAM_SUCCESS)
747     {
748         return false;
749     }
750     return true;
751 }
752 
753 Cc UserAccess::setSpecialUserPassword(const std::string& userName,
754                                       const SecureString& userPassword)
755 {
756     if (pamUpdatePasswd(userName.c_str(), userPassword.c_str()) != PAM_SUCCESS)
757     {
758         log<level::DEBUG>("Failed to update password");
759         return ccUnspecifiedError;
760     }
761     return ccSuccess;
762 }
763 
764 Cc UserAccess::setUserPassword(const uint8_t userId, const char* userPassword)
765 {
766     std::string userName;
767     if (ipmiUserGetUserName(userId, userName) != ccSuccess)
768     {
769         log<level::DEBUG>("User Name not found",
770                           entry("USER-ID=%d", (uint8_t)userId));
771         return ccParmOutOfRange;
772     }
773 
774     ipmi::SecureString passwd;
775     passwd.assign(reinterpret_cast<const char*>(userPassword), 0,
776                   maxIpmi20PasswordSize);
777     int retval = pamUpdatePasswd(userName.c_str(), passwd.c_str());
778 
779     switch (retval)
780     {
781         case PAM_SUCCESS:
782         {
783             return ccSuccess;
784         }
785         case PAM_AUTHTOK_ERR:
786         {
787             log<level::DEBUG>("Bad authentication token");
788             return ccInvalidFieldRequest;
789         }
790         default:
791         {
792             log<level::DEBUG>("Failed to update password",
793                               entry("USER-ID=%d", (uint8_t)userId));
794             return ccUnspecifiedError;
795         }
796     }
797 }
798 
799 Cc UserAccess::setUserEnabledState(const uint8_t userId,
800                                    const bool& enabledState)
801 {
802     if (!isValidUserId(userId))
803     {
804         return ccParmOutOfRange;
805     }
806     boost::interprocess::scoped_lock<boost::interprocess::named_recursive_mutex>
807         userLock{*userMutex};
808     UserInfo* userInfo = getUserInfo(userId);
809     std::string userName;
810     userName.assign(reinterpret_cast<char*>(userInfo->userName), 0,
811                     ipmiMaxUserName);
812     if (userName.empty())
813     {
814         log<level::DEBUG>("User name not set / invalid");
815         return ccUnspecifiedError;
816     }
817     if (userInfo->userEnabled != enabledState)
818     {
819         sdbusplus::message::object_path tempUserPath(userObjBasePath);
820         tempUserPath /= userName;
821         std::string userPath(tempUserPath);
822         setDbusProperty(bus, getUserServiceName(), userPath, usersInterface,
823                         userEnabledProperty, enabledState);
824         userInfo->userEnabled = enabledState;
825         try
826         {
827             writeUserData();
828         }
829         catch (const std::exception& e)
830         {
831             log<level::DEBUG>("Write user data failed");
832             return ccUnspecifiedError;
833         }
834     }
835     return ccSuccess;
836 }
837 
838 Cc UserAccess::setUserPayloadAccess(const uint8_t chNum,
839                                     const uint8_t operation,
840                                     const uint8_t userId,
841                                     const PayloadAccess& payloadAccess)
842 {
843     constexpr uint8_t enable = 0x0;
844     constexpr uint8_t disable = 0x1;
845 
846     if (!isValidChannel(chNum))
847     {
848         return ccInvalidFieldRequest;
849     }
850     if (!isValidUserId(userId))
851     {
852         return ccParmOutOfRange;
853     }
854     if (operation != enable && operation != disable)
855     {
856         return ccInvalidFieldRequest;
857     }
858     // Check operation & payloadAccess if required.
859     boost::interprocess::scoped_lock<boost::interprocess::named_recursive_mutex>
860         userLock{*userMutex};
861     UserInfo* userInfo = getUserInfo(userId);
862 
863     if (operation == enable)
864     {
865         userInfo->payloadAccess[chNum].stdPayloadEnables1 |=
866             payloadAccess.stdPayloadEnables1;
867 
868         userInfo->payloadAccess[chNum].oemPayloadEnables1 |=
869             payloadAccess.oemPayloadEnables1;
870     }
871     else
872     {
873         userInfo->payloadAccess[chNum].stdPayloadEnables1 &=
874             ~(payloadAccess.stdPayloadEnables1);
875 
876         userInfo->payloadAccess[chNum].oemPayloadEnables1 &=
877             ~(payloadAccess.oemPayloadEnables1);
878     }
879 
880     try
881     {
882         writeUserData();
883     }
884     catch (const std::exception& e)
885     {
886         log<level::ERR>("Write user data failed");
887         return ccUnspecifiedError;
888     }
889     return ccSuccess;
890 }
891 
892 Cc UserAccess::setUserPrivilegeAccess(const uint8_t userId, const uint8_t chNum,
893                                       const UserPrivAccess& privAccess,
894                                       const bool& otherPrivUpdates)
895 {
896     if (!isValidChannel(chNum))
897     {
898         return ccInvalidFieldRequest;
899     }
900     if (!isValidUserId(userId))
901     {
902         return ccParmOutOfRange;
903     }
904     boost::interprocess::scoped_lock<boost::interprocess::named_recursive_mutex>
905         userLock{*userMutex};
906     UserInfo* userInfo = getUserInfo(userId);
907     std::string userName;
908     userName.assign(reinterpret_cast<char*>(userInfo->userName), 0,
909                     ipmiMaxUserName);
910     if (userName.empty())
911     {
912         log<level::DEBUG>("User name not set / invalid");
913         return ccUnspecifiedError;
914     }
915     std::string priv = convertToSystemPrivilege(
916         static_cast<CommandPrivilege>(privAccess.privilege));
917     uint8_t syncIndex = getUsrMgmtSyncIndex();
918     if (chNum == syncIndex &&
919         privAccess.privilege != userInfo->userPrivAccess[syncIndex].privilege)
920     {
921         sdbusplus::message::object_path tempUserPath(userObjBasePath);
922         tempUserPath /= userName;
923         std::string userPath(tempUserPath);
924         setDbusProperty(bus, getUserServiceName(), userPath, usersInterface,
925                         userPrivProperty, priv);
926     }
927     userInfo->userPrivAccess[chNum].privilege = privAccess.privilege;
928 
929     if (otherPrivUpdates)
930     {
931         userInfo->userPrivAccess[chNum].ipmiEnabled = privAccess.ipmiEnabled;
932         userInfo->userPrivAccess[chNum].linkAuthEnabled =
933             privAccess.linkAuthEnabled;
934         userInfo->userPrivAccess[chNum].accessCallback =
935             privAccess.accessCallback;
936     }
937     try
938     {
939         writeUserData();
940     }
941     catch (const std::exception& e)
942     {
943         log<level::DEBUG>("Write user data failed");
944         return ccUnspecifiedError;
945     }
946     return ccSuccess;
947 }
948 
949 uint8_t UserAccess::getUserId(const std::string& userName)
950 {
951     boost::interprocess::scoped_lock<boost::interprocess::named_recursive_mutex>
952         userLock{*userMutex};
953     checkAndReloadUserData();
954     // user index 0 is reserved, starts with 1
955     size_t usrIndex = 1;
956     for (; usrIndex <= ipmiMaxUsers; ++usrIndex)
957     {
958         std::string curName(
959             reinterpret_cast<char*>(usersTbl.user[usrIndex].userName), 0,
960             ipmiMaxUserName);
961         if (userName == curName)
962         {
963             break; // found the entry
964         }
965     }
966     if (usrIndex > ipmiMaxUsers)
967     {
968         log<level::DEBUG>("User not found",
969                           entry("USER_NAME=%s", userName.c_str()));
970         return invalidUserId;
971     }
972 
973     return usrIndex;
974 }
975 
976 Cc UserAccess::getUserName(const uint8_t userId, std::string& userName)
977 {
978     if (!isValidUserId(userId))
979     {
980         return ccParmOutOfRange;
981     }
982     UserInfo* userInfo = getUserInfo(userId);
983     userName.assign(reinterpret_cast<char*>(userInfo->userName), 0,
984                     ipmiMaxUserName);
985     return ccSuccess;
986 }
987 
988 bool UserAccess::isIpmiInAvailableGroupList()
989 {
990     if (std::find(availableGroups.begin(), availableGroups.end(),
991                   ipmiGrpName) != availableGroups.end())
992     {
993         return true;
994     }
995     if (availableGroups.empty())
996     {
997         // available groups shouldn't be empty, re-query
998         getSystemPrivAndGroups();
999         if (std::find(availableGroups.begin(), availableGroups.end(),
1000                       ipmiGrpName) != availableGroups.end())
1001         {
1002             return true;
1003         }
1004     }
1005     return false;
1006 }
1007 
1008 Cc UserAccess::setUserName(const uint8_t userId, const std::string& userName)
1009 {
1010     if (!isValidUserId(userId))
1011     {
1012         return ccParmOutOfRange;
1013     }
1014 
1015     boost::interprocess::scoped_lock<boost::interprocess::named_recursive_mutex>
1016         userLock{*userMutex};
1017     std::string oldUser;
1018     getUserName(userId, oldUser);
1019 
1020     if (oldUser == userName)
1021     {
1022         // requesting to set the same user name, return success.
1023         return ccSuccess;
1024     }
1025 
1026     bool validUser = isValidUserName(userName);
1027     UserInfo* userInfo = getUserInfo(userId);
1028     if (userName.empty() && !oldUser.empty())
1029     {
1030         // Delete existing user
1031         sdbusplus::message::object_path tempUserPath(userObjBasePath);
1032         tempUserPath /= oldUser;
1033         std::string userPath(tempUserPath);
1034         try
1035         {
1036             auto method = bus.new_method_call(
1037                 getUserServiceName().c_str(), userPath.c_str(),
1038                 deleteUserInterface, deleteUserMethod);
1039             auto reply = bus.call(method);
1040         }
1041         catch (const sdbusplus::exception::exception& e)
1042         {
1043             log<level::DEBUG>("Failed to excute method",
1044                               entry("METHOD=%s", deleteUserMethod),
1045                               entry("PATH=%s", userPath.c_str()));
1046             return ccUnspecifiedError;
1047         }
1048         deleteUserIndex(userId);
1049     }
1050     else if (oldUser.empty() && !userName.empty() && validUser)
1051     {
1052         try
1053         {
1054             if (!isIpmiInAvailableGroupList())
1055             {
1056                 return ccUnspecifiedError;
1057             }
1058             // Create new user
1059             auto method = bus.new_method_call(
1060                 getUserServiceName().c_str(), userMgrObjBasePath,
1061                 userMgrInterface, createUserMethod);
1062             method.append(userName.c_str(), availableGroups, "", false);
1063             auto reply = bus.call(method);
1064         }
1065         catch (const sdbusplus::exception::exception& e)
1066         {
1067             log<level::DEBUG>("Failed to excute method",
1068                               entry("METHOD=%s", createUserMethod),
1069                               entry("PATH=%s", userMgrObjBasePath));
1070             return ccUnspecifiedError;
1071         }
1072 
1073         std::memset(userInfo->userName, 0, sizeof(userInfo->userName));
1074         std::memcpy(userInfo->userName,
1075                     static_cast<const void*>(userName.data()), userName.size());
1076         userInfo->userInSystem = true;
1077     }
1078     else if (oldUser != userName && validUser)
1079     {
1080         try
1081         {
1082             // User rename
1083             auto method = bus.new_method_call(
1084                 getUserServiceName().c_str(), userMgrObjBasePath,
1085                 userMgrInterface, renameUserMethod);
1086             method.append(oldUser.c_str(), userName.c_str());
1087             auto reply = bus.call(method);
1088         }
1089         catch (const sdbusplus::exception::exception& e)
1090         {
1091             log<level::DEBUG>("Failed to excute method",
1092                               entry("METHOD=%s", renameUserMethod),
1093                               entry("PATH=%s", userMgrObjBasePath));
1094             return ccUnspecifiedError;
1095         }
1096         std::fill(static_cast<uint8_t*>(userInfo->userName),
1097                   static_cast<uint8_t*>(userInfo->userName) +
1098                       sizeof(userInfo->userName),
1099                   0);
1100 
1101         std::memset(userInfo->userName, 0, sizeof(userInfo->userName));
1102         std::memcpy(userInfo->userName,
1103                     static_cast<const void*>(userName.data()), userName.size());
1104 
1105         ipmiRenameUserEntryPassword(oldUser, userName);
1106         userInfo->userInSystem = true;
1107     }
1108     else if (!validUser)
1109     {
1110         return ccInvalidFieldRequest;
1111     }
1112     try
1113     {
1114         writeUserData();
1115     }
1116     catch (const std::exception& e)
1117     {
1118         log<level::DEBUG>("Write user data failed");
1119         return ccUnspecifiedError;
1120     }
1121     return ccSuccess;
1122 }
1123 
1124 static constexpr const char* jsonUserName = "user_name";
1125 static constexpr const char* jsonPriv = "privilege";
1126 static constexpr const char* jsonIpmiEnabled = "ipmi_enabled";
1127 static constexpr const char* jsonLinkAuthEnabled = "link_auth_enabled";
1128 static constexpr const char* jsonAccCallbk = "access_callback";
1129 static constexpr const char* jsonUserEnabled = "user_enabled";
1130 static constexpr const char* jsonUserInSys = "user_in_system";
1131 static constexpr const char* jsonFixedUser = "fixed_user_name";
1132 static constexpr const char* payloadEnabledStr = "payload_enabled";
1133 static constexpr const char* stdPayloadStr = "std_payload";
1134 static constexpr const char* oemPayloadStr = "OEM_payload";
1135 
1136 /** @brief to construct a JSON object from the given payload access details.
1137  *
1138  *  @param[in] stdPayload - stdPayloadEnables1 in a 2D-array. (input)
1139  *  @param[in] oemPayload - oemPayloadEnables1 in a 2D-array. (input)
1140  *
1141  *  @details Sample output JSON object format :
1142  *  "payload_enabled":{
1143  *  "OEM_payload0":[false,...<repeat 'ipmiMaxChannels - 1' times>],
1144  *  "OEM_payload1":[false,...<repeat 'ipmiMaxChannels - 1' times>],
1145  *  "OEM_payload2":[false,...<repeat 'ipmiMaxChannels - 1' times>],
1146  *  "OEM_payload3":[false,...<repeat 'ipmiMaxChannels - 1' times>],
1147  *  "OEM_payload4":[false,...<repeat 'ipmiMaxChannels - 1' times>],
1148  *  "OEM_payload5":[false,...<repeat 'ipmiMaxChannels - 1' times>],
1149  *  "OEM_payload6":[false,...<repeat 'ipmiMaxChannels - 1' times>],
1150  *  "OEM_payload7":[false,...<repeat 'ipmiMaxChannels - 1' times>],
1151  *  "std_payload0":[false,...<repeat 'ipmiMaxChannels - 1' times>],
1152  *  "std_payload1":[false,...<repeat 'ipmiMaxChannels - 1' times>],
1153  *  "std_payload2":[false,...<repeat 'ipmiMaxChannels - 1' times>],
1154  *  "std_payload3":[false,...<repeat 'ipmiMaxChannels - 1' times>],
1155  *  "std_payload4":[false,...<repeat 'ipmiMaxChannels - 1' times>],
1156  *  "std_payload5":[false,...<repeat 'ipmiMaxChannels - 1' times>],
1157  *  "std_payload6":[false,...<repeat 'ipmiMaxChannels - 1' times>],
1158  *  "std_payload7":[false,...<repeat 'ipmiMaxChannels - 1' times>],
1159  *  }
1160  */
1161 static const Json constructJsonPayloadEnables(
1162     const std::array<std::array<bool, ipmiMaxChannels>, payloadsPerByte>&
1163         stdPayload,
1164     const std::array<std::array<bool, ipmiMaxChannels>, payloadsPerByte>&
1165         oemPayload)
1166 {
1167     Json jsonPayloadEnabled;
1168 
1169     for (auto payloadNum = 0; payloadNum < payloadsPerByte; payloadNum++)
1170     {
1171         std::ostringstream stdPayloadStream;
1172         std::ostringstream oemPayloadStream;
1173 
1174         stdPayloadStream << stdPayloadStr << payloadNum;
1175         oemPayloadStream << oemPayloadStr << payloadNum;
1176 
1177         jsonPayloadEnabled.push_back(Json::object_t::value_type(
1178             stdPayloadStream.str(), stdPayload[payloadNum]));
1179 
1180         jsonPayloadEnabled.push_back(Json::object_t::value_type(
1181             oemPayloadStream.str(), oemPayload[payloadNum]));
1182     }
1183     return jsonPayloadEnabled;
1184 }
1185 
1186 void UserAccess::readPayloadAccessFromUserInfo(
1187     const UserInfo& userInfo,
1188     std::array<std::array<bool, ipmiMaxChannels>, payloadsPerByte>& stdPayload,
1189     std::array<std::array<bool, ipmiMaxChannels>, payloadsPerByte>& oemPayload)
1190 {
1191     for (auto payloadNum = 0; payloadNum < payloadsPerByte; payloadNum++)
1192     {
1193         for (auto chIndex = 0; chIndex < ipmiMaxChannels; chIndex++)
1194         {
1195             stdPayload[payloadNum][chIndex] =
1196                 userInfo.payloadAccess[chIndex].stdPayloadEnables1[payloadNum];
1197 
1198             oemPayload[payloadNum][chIndex] =
1199                 userInfo.payloadAccess[chIndex].oemPayloadEnables1[payloadNum];
1200         }
1201     }
1202 }
1203 
1204 void UserAccess::updatePayloadAccessInUserInfo(
1205     const std::array<std::array<bool, ipmiMaxChannels>, payloadsPerByte>&
1206         stdPayload,
1207     const std::array<std::array<bool, ipmiMaxChannels>, payloadsPerByte>&
1208         oemPayload,
1209     UserInfo& userInfo)
1210 {
1211     for (size_t chIndex = 0; chIndex < ipmiMaxChannels; ++chIndex)
1212     {
1213         // Ensure that reserved/unsupported payloads are marked to zero.
1214         userInfo.payloadAccess[chIndex].stdPayloadEnables1.reset();
1215         userInfo.payloadAccess[chIndex].oemPayloadEnables1.reset();
1216         userInfo.payloadAccess[chIndex].stdPayloadEnables2Reserved.reset();
1217         userInfo.payloadAccess[chIndex].oemPayloadEnables2Reserved.reset();
1218         // Update SOL status as it is the only supported payload currently.
1219         userInfo.payloadAccess[chIndex]
1220             .stdPayloadEnables1[static_cast<uint8_t>(ipmi::PayloadType::SOL)] =
1221             stdPayload[static_cast<uint8_t>(ipmi::PayloadType::SOL)][chIndex];
1222     }
1223 }
1224 
1225 void UserAccess::readUserData()
1226 {
1227     boost::interprocess::scoped_lock<boost::interprocess::named_recursive_mutex>
1228         userLock{*userMutex};
1229 
1230     std::ifstream iUsrData(ipmiUserDataFile, std::ios::in | std::ios::binary);
1231     if (!iUsrData.good())
1232     {
1233         log<level::ERR>("Error in reading IPMI user data file");
1234         throw std::ios_base::failure("Error opening IPMI user data file");
1235     }
1236 
1237     Json jsonUsersTbl = Json::array();
1238     jsonUsersTbl = Json::parse(iUsrData, nullptr, false);
1239 
1240     if (jsonUsersTbl.size() != ipmiMaxUsers)
1241     {
1242         log<level::ERR>(
1243             "Error in reading IPMI user data file - User count issues");
1244         throw std::runtime_error(
1245             "Corrupted IPMI user data file - invalid user count");
1246     }
1247 
1248     // user index 0 is reserved, starts with 1
1249     for (size_t usrIndex = 1; usrIndex <= ipmiMaxUsers; ++usrIndex)
1250     {
1251         Json userInfo = jsonUsersTbl[usrIndex - 1]; // json array starts with 0.
1252         if (userInfo.is_null())
1253         {
1254             log<level::ERR>("Error in reading IPMI user data file - "
1255                             "user info corrupted");
1256             throw std::runtime_error(
1257                 "Corrupted IPMI user data file - invalid user info");
1258         }
1259         std::string userName = userInfo[jsonUserName].get<std::string>();
1260         std::strncpy(reinterpret_cast<char*>(usersTbl.user[usrIndex].userName),
1261                      userName.c_str(), ipmiMaxUserName);
1262 
1263         std::vector<std::string> privilege =
1264             userInfo[jsonPriv].get<std::vector<std::string>>();
1265         std::vector<bool> ipmiEnabled =
1266             userInfo[jsonIpmiEnabled].get<std::vector<bool>>();
1267         std::vector<bool> linkAuthEnabled =
1268             userInfo[jsonLinkAuthEnabled].get<std::vector<bool>>();
1269         std::vector<bool> accessCallback =
1270             userInfo[jsonAccCallbk].get<std::vector<bool>>();
1271 
1272         // Payload Enables Processing.
1273         std::array<std::array<bool, ipmiMaxChannels>, payloadsPerByte>
1274             stdPayload = {};
1275         std::array<std::array<bool, ipmiMaxChannels>, payloadsPerByte>
1276             oemPayload = {};
1277         try
1278         {
1279             const auto jsonPayloadEnabled = userInfo.at(payloadEnabledStr);
1280             for (auto payloadNum = 0; payloadNum < payloadsPerByte;
1281                  payloadNum++)
1282             {
1283                 std::ostringstream stdPayloadStream;
1284                 std::ostringstream oemPayloadStream;
1285 
1286                 stdPayloadStream << stdPayloadStr << payloadNum;
1287                 oemPayloadStream << oemPayloadStr << payloadNum;
1288 
1289                 stdPayload[payloadNum] =
1290                     jsonPayloadEnabled[stdPayloadStream.str()]
1291                         .get<std::array<bool, ipmiMaxChannels>>();
1292                 oemPayload[payloadNum] =
1293                     jsonPayloadEnabled[oemPayloadStream.str()]
1294                         .get<std::array<bool, ipmiMaxChannels>>();
1295 
1296                 if (stdPayload[payloadNum].size() != ipmiMaxChannels ||
1297                     oemPayload[payloadNum].size() != ipmiMaxChannels)
1298                 {
1299                     log<level::ERR>("Error in reading IPMI user data file - "
1300                                     "payload properties corrupted");
1301                     throw std::runtime_error(
1302                         "Corrupted IPMI user data file - payload properties");
1303                 }
1304             }
1305         }
1306         catch (const Json::out_of_range& e)
1307         {
1308             // Key not found in 'userInfo'; possibly an old JSON file. Use
1309             // default values for all payloads, and SOL payload default is true.
1310             stdPayload[static_cast<uint8_t>(ipmi::PayloadType::SOL)].fill(true);
1311         }
1312 
1313         if (privilege.size() != ipmiMaxChannels ||
1314             ipmiEnabled.size() != ipmiMaxChannels ||
1315             linkAuthEnabled.size() != ipmiMaxChannels ||
1316             accessCallback.size() != ipmiMaxChannels)
1317         {
1318             log<level::ERR>("Error in reading IPMI user data file - "
1319                             "properties corrupted");
1320             throw std::runtime_error(
1321                 "Corrupted IPMI user data file - properties");
1322         }
1323         for (size_t chIndex = 0; chIndex < ipmiMaxChannels; ++chIndex)
1324         {
1325             usersTbl.user[usrIndex].userPrivAccess[chIndex].privilege =
1326                 static_cast<uint8_t>(
1327                     convertToIPMIPrivilege(privilege[chIndex]));
1328             usersTbl.user[usrIndex].userPrivAccess[chIndex].ipmiEnabled =
1329                 ipmiEnabled[chIndex];
1330             usersTbl.user[usrIndex].userPrivAccess[chIndex].linkAuthEnabled =
1331                 linkAuthEnabled[chIndex];
1332             usersTbl.user[usrIndex].userPrivAccess[chIndex].accessCallback =
1333                 accessCallback[chIndex];
1334         }
1335         updatePayloadAccessInUserInfo(stdPayload, oemPayload,
1336                                       usersTbl.user[usrIndex]);
1337         usersTbl.user[usrIndex].userEnabled =
1338             userInfo[jsonUserEnabled].get<bool>();
1339         usersTbl.user[usrIndex].userInSystem =
1340             userInfo[jsonUserInSys].get<bool>();
1341         usersTbl.user[usrIndex].fixedUserName =
1342             userInfo[jsonFixedUser].get<bool>();
1343     }
1344 
1345     log<level::DEBUG>("User data read from IPMI data file");
1346     iUsrData.close();
1347     // Update the timestamp
1348     fileLastUpdatedTime = getUpdatedFileTime();
1349     return;
1350 }
1351 
1352 void UserAccess::writeUserData()
1353 {
1354     boost::interprocess::scoped_lock<boost::interprocess::named_recursive_mutex>
1355         userLock{*userMutex};
1356 
1357     Json jsonUsersTbl = Json::array();
1358     // user index 0 is reserved, starts with 1
1359     for (size_t usrIndex = 1; usrIndex <= ipmiMaxUsers; ++usrIndex)
1360     {
1361         Json jsonUserInfo;
1362         jsonUserInfo[jsonUserName] = std::string(
1363             reinterpret_cast<char*>(usersTbl.user[usrIndex].userName), 0,
1364             ipmiMaxUserName);
1365         std::vector<std::string> privilege(ipmiMaxChannels);
1366         std::vector<bool> ipmiEnabled(ipmiMaxChannels);
1367         std::vector<bool> linkAuthEnabled(ipmiMaxChannels);
1368         std::vector<bool> accessCallback(ipmiMaxChannels);
1369 
1370         std::array<std::array<bool, ipmiMaxChannels>, payloadsPerByte>
1371             stdPayload;
1372         std::array<std::array<bool, ipmiMaxChannels>, payloadsPerByte>
1373             oemPayload;
1374 
1375         for (size_t chIndex = 0; chIndex < ipmiMaxChannels; chIndex++)
1376         {
1377             privilege[chIndex] =
1378                 convertToSystemPrivilege(static_cast<CommandPrivilege>(
1379                     usersTbl.user[usrIndex].userPrivAccess[chIndex].privilege));
1380             ipmiEnabled[chIndex] =
1381                 usersTbl.user[usrIndex].userPrivAccess[chIndex].ipmiEnabled;
1382             linkAuthEnabled[chIndex] =
1383                 usersTbl.user[usrIndex].userPrivAccess[chIndex].linkAuthEnabled;
1384             accessCallback[chIndex] =
1385                 usersTbl.user[usrIndex].userPrivAccess[chIndex].accessCallback;
1386         }
1387         jsonUserInfo[jsonPriv] = privilege;
1388         jsonUserInfo[jsonIpmiEnabled] = ipmiEnabled;
1389         jsonUserInfo[jsonLinkAuthEnabled] = linkAuthEnabled;
1390         jsonUserInfo[jsonAccCallbk] = accessCallback;
1391         jsonUserInfo[jsonUserEnabled] = usersTbl.user[usrIndex].userEnabled;
1392         jsonUserInfo[jsonUserInSys] = usersTbl.user[usrIndex].userInSystem;
1393         jsonUserInfo[jsonFixedUser] = usersTbl.user[usrIndex].fixedUserName;
1394 
1395         readPayloadAccessFromUserInfo(usersTbl.user[usrIndex], stdPayload,
1396                                       oemPayload);
1397         Json jsonPayloadEnabledInfo =
1398             constructJsonPayloadEnables(stdPayload, oemPayload);
1399         jsonUserInfo[payloadEnabledStr] = jsonPayloadEnabledInfo;
1400 
1401         jsonUsersTbl.push_back(jsonUserInfo);
1402     }
1403 
1404     static std::string tmpFile{std::string(ipmiUserDataFile) + "_tmp"};
1405     int fd = open(tmpFile.c_str(), O_CREAT | O_WRONLY | O_TRUNC | O_SYNC,
1406                   S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
1407     if (fd < 0)
1408     {
1409         log<level::ERR>("Error in creating temporary IPMI user data file");
1410         throw std::ios_base::failure(
1411             "Error in creating temporary IPMI user data file");
1412     }
1413     const auto& writeStr = jsonUsersTbl.dump();
1414     if (write(fd, writeStr.c_str(), writeStr.size()) !=
1415         static_cast<ssize_t>(writeStr.size()))
1416     {
1417         close(fd);
1418         log<level::ERR>("Error in writing temporary IPMI user data file");
1419         throw std::ios_base::failure(
1420             "Error in writing temporary IPMI user data file");
1421     }
1422     close(fd);
1423 
1424     if (std::rename(tmpFile.c_str(), ipmiUserDataFile) != 0)
1425     {
1426         log<level::ERR>("Error in renaming temporary IPMI user data file");
1427         throw std::runtime_error("Error in renaming IPMI user data file");
1428     }
1429     // Update the timestamp
1430     fileLastUpdatedTime = getUpdatedFileTime();
1431     return;
1432 }
1433 
1434 bool UserAccess::addUserEntry(const std::string& userName,
1435                               const std::string& sysPriv, const bool& enabled)
1436 {
1437     UsersTbl* userData = getUsersTblPtr();
1438     size_t freeIndex = 0xFF;
1439     // user index 0 is reserved, starts with 1
1440     for (size_t usrIndex = 1; usrIndex <= ipmiMaxUsers; ++usrIndex)
1441     {
1442         std::string curName(
1443             reinterpret_cast<char*>(userData->user[usrIndex].userName), 0,
1444             ipmiMaxUserName);
1445         if (userName == curName)
1446         {
1447             log<level::DEBUG>("User name exists",
1448                               entry("USER_NAME=%s", userName.c_str()));
1449             return false; // user name exists.
1450         }
1451 
1452         if ((!userData->user[usrIndex].userInSystem) &&
1453             (userData->user[usrIndex].userName[0] == '\0') &&
1454             (freeIndex == 0xFF))
1455         {
1456             freeIndex = usrIndex;
1457         }
1458     }
1459     if (freeIndex == 0xFF)
1460     {
1461         log<level::ERR>("No empty slots found");
1462         return false;
1463     }
1464     std::strncpy(reinterpret_cast<char*>(userData->user[freeIndex].userName),
1465                  userName.c_str(), ipmiMaxUserName);
1466     uint8_t priv =
1467         static_cast<uint8_t>(UserAccess::convertToIPMIPrivilege(sysPriv)) &
1468         privMask;
1469     for (size_t chIndex = 0; chIndex < ipmiMaxChannels; ++chIndex)
1470     {
1471         userData->user[freeIndex].userPrivAccess[chIndex].privilege = priv;
1472         userData->user[freeIndex].userPrivAccess[chIndex].ipmiEnabled = true;
1473         userData->user[freeIndex].userPrivAccess[chIndex].linkAuthEnabled =
1474             true;
1475         userData->user[freeIndex].userPrivAccess[chIndex].accessCallback = true;
1476     }
1477     userData->user[freeIndex].userInSystem = true;
1478     userData->user[freeIndex].userEnabled = enabled;
1479 
1480     return true;
1481 }
1482 
1483 void UserAccess::deleteUserIndex(const size_t& usrIdx)
1484 {
1485     UsersTbl* userData = getUsersTblPtr();
1486 
1487     std::string userName(
1488         reinterpret_cast<char*>(userData->user[usrIdx].userName), 0,
1489         ipmiMaxUserName);
1490     ipmiClearUserEntryPassword(userName);
1491     std::fill(static_cast<uint8_t*>(userData->user[usrIdx].userName),
1492               static_cast<uint8_t*>(userData->user[usrIdx].userName) +
1493                   sizeof(userData->user[usrIdx].userName),
1494               0);
1495     for (size_t chIndex = 0; chIndex < ipmiMaxChannels; ++chIndex)
1496     {
1497         userData->user[usrIdx].userPrivAccess[chIndex].privilege = privNoAccess;
1498         userData->user[usrIdx].userPrivAccess[chIndex].ipmiEnabled = false;
1499         userData->user[usrIdx].userPrivAccess[chIndex].linkAuthEnabled = false;
1500         userData->user[usrIdx].userPrivAccess[chIndex].accessCallback = false;
1501     }
1502     userData->user[usrIdx].userInSystem = false;
1503     userData->user[usrIdx].userEnabled = false;
1504     return;
1505 }
1506 
1507 void UserAccess::checkAndReloadUserData()
1508 {
1509     std::timespec updateTime = getUpdatedFileTime();
1510     if ((updateTime.tv_sec != fileLastUpdatedTime.tv_sec ||
1511          updateTime.tv_nsec != fileLastUpdatedTime.tv_nsec) ||
1512         (updateTime.tv_sec == 0 && updateTime.tv_nsec == 0))
1513     {
1514         std::fill(reinterpret_cast<uint8_t*>(&usersTbl),
1515                   reinterpret_cast<uint8_t*>(&usersTbl) + sizeof(usersTbl), 0);
1516         readUserData();
1517     }
1518     return;
1519 }
1520 
1521 UsersTbl* UserAccess::getUsersTblPtr()
1522 {
1523     // reload data before using it.
1524     checkAndReloadUserData();
1525     return &usersTbl;
1526 }
1527 
1528 void UserAccess::getSystemPrivAndGroups()
1529 {
1530     std::map<std::string, PrivAndGroupType> properties;
1531     try
1532     {
1533         auto method = bus.new_method_call(
1534             getUserServiceName().c_str(), userMgrObjBasePath,
1535             dBusPropertiesInterface, getAllPropertiesMethod);
1536         method.append(userMgrInterface);
1537 
1538         auto reply = bus.call(method);
1539         reply.read(properties);
1540     }
1541     catch (const sdbusplus::exception::exception& e)
1542     {
1543         log<level::DEBUG>("Failed to excute method",
1544                           entry("METHOD=%s", getAllPropertiesMethod),
1545                           entry("PATH=%s", userMgrObjBasePath));
1546         return;
1547     }
1548     for (const auto& t : properties)
1549     {
1550         auto key = t.first;
1551         if (key == allPrivProperty)
1552         {
1553             availablePrivileges = std::get<std::vector<std::string>>(t.second);
1554         }
1555         else if (key == allGrpProperty)
1556         {
1557             availableGroups = std::get<std::vector<std::string>>(t.second);
1558         }
1559     }
1560     // TODO: Implement Supported Privilege & Groups verification logic
1561     return;
1562 }
1563 
1564 std::timespec UserAccess::getUpdatedFileTime()
1565 {
1566     struct stat fileStat;
1567     if (stat(ipmiUserDataFile, &fileStat) != 0)
1568     {
1569         log<level::DEBUG>("Error in getting last updated time stamp");
1570         return std::timespec{0, 0};
1571     }
1572     return fileStat.st_mtim;
1573 }
1574 
1575 void UserAccess::getUserProperties(const DbusUserObjProperties& properties,
1576                                    std::vector<std::string>& usrGrps,
1577                                    std::string& usrPriv, bool& usrEnabled)
1578 {
1579     for (const auto& t : properties)
1580     {
1581         std::string key = t.first;
1582         if (key == userPrivProperty)
1583         {
1584             usrPriv = std::get<std::string>(t.second);
1585         }
1586         else if (key == userGrpProperty)
1587         {
1588             usrGrps = std::get<std::vector<std::string>>(t.second);
1589         }
1590         else if (key == userEnabledProperty)
1591         {
1592             usrEnabled = std::get<bool>(t.second);
1593         }
1594     }
1595     return;
1596 }
1597 
1598 int UserAccess::getUserObjProperties(const DbusUserObjValue& userObjs,
1599                                      std::vector<std::string>& usrGrps,
1600                                      std::string& usrPriv, bool& usrEnabled)
1601 {
1602     auto usrObj = userObjs.find(usersInterface);
1603     if (usrObj != userObjs.end())
1604     {
1605         getUserProperties(usrObj->second, usrGrps, usrPriv, usrEnabled);
1606         return 0;
1607     }
1608     return -EIO;
1609 }
1610 
1611 void UserAccess::cacheUserDataFile()
1612 {
1613     boost::interprocess::scoped_lock<boost::interprocess::named_recursive_mutex>
1614         userLock{*userMutex};
1615     try
1616     {
1617         readUserData();
1618     }
1619     catch (const std::ios_base::failure& e)
1620     { // File is empty, create it for the first time
1621         std::fill(reinterpret_cast<uint8_t*>(&usersTbl),
1622                   reinterpret_cast<uint8_t*>(&usersTbl) + sizeof(usersTbl), 0);
1623         // user index 0 is reserved, starts with 1
1624         for (size_t userIndex = 1; userIndex <= ipmiMaxUsers; ++userIndex)
1625         {
1626             for (size_t chIndex = 0; chIndex < ipmiMaxChannels; ++chIndex)
1627             {
1628                 usersTbl.user[userIndex].userPrivAccess[chIndex].privilege =
1629                     privNoAccess;
1630                 usersTbl.user[userIndex]
1631                     .payloadAccess[chIndex]
1632                     .stdPayloadEnables1[static_cast<uint8_t>(
1633                         ipmi::PayloadType::SOL)] = true;
1634             }
1635         }
1636         writeUserData();
1637     }
1638     // Create lock file if it does not exist
1639     int fd = open(ipmiUserSignalLockFile, O_CREAT | O_TRUNC | O_SYNC,
1640                   S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
1641     if (fd < 0)
1642     {
1643         log<level::ERR>("Error in creating IPMI user signal lock file");
1644         throw std::ios_base::failure(
1645             "Error in creating temporary IPMI user signal lock file");
1646     }
1647     close(fd);
1648 
1649     sigHndlrLock = boost::interprocess::file_lock(ipmiUserSignalLockFile);
1650     // Register it for single object and single process either netipimd /
1651     // host-ipmid
1652     if (userUpdatedSignal == nullptr && sigHndlrLock.try_lock())
1653     {
1654         log<level::DEBUG>("Registering signal handler");
1655         userUpdatedSignal = std::make_unique<sdbusplus::bus::match_t>(
1656             bus,
1657             sdbusplus::bus::match::rules::type::signal() +
1658                 sdbusplus::bus::match::rules::interface(dBusObjManager) +
1659                 sdbusplus::bus::match::rules::path(userMgrObjBasePath),
1660             [&](sdbusplus::message::message& msg) {
1661                 userUpdatedSignalHandler(*this, msg);
1662             });
1663         userMgrRenamedSignal = std::make_unique<sdbusplus::bus::match_t>(
1664             bus,
1665             sdbusplus::bus::match::rules::type::signal() +
1666                 sdbusplus::bus::match::rules::interface(userMgrInterface) +
1667                 sdbusplus::bus::match::rules::path(userMgrObjBasePath),
1668             [&](sdbusplus::message::message& msg) {
1669                 userUpdatedSignalHandler(*this, msg);
1670             });
1671         userPropertiesSignal = std::make_unique<sdbusplus::bus::match_t>(
1672             bus,
1673             sdbusplus::bus::match::rules::type::signal() +
1674                 sdbusplus::bus::match::rules::path_namespace(userObjBasePath) +
1675                 sdbusplus::bus::match::rules::interface(
1676                     dBusPropertiesInterface) +
1677                 sdbusplus::bus::match::rules::member(propertiesChangedSignal) +
1678                 sdbusplus::bus::match::rules::argN(0, usersInterface),
1679             [&](sdbusplus::message::message& msg) {
1680                 userUpdatedSignalHandler(*this, msg);
1681             });
1682         signalHndlrObject = true;
1683     }
1684     std::map<DbusUserObjPath, DbusUserObjValue> managedObjs;
1685     try
1686     {
1687         auto method = bus.new_method_call(getUserServiceName().c_str(),
1688                                           userMgrObjBasePath, dBusObjManager,
1689                                           getManagedObjectsMethod);
1690         auto reply = bus.call(method);
1691         reply.read(managedObjs);
1692     }
1693     catch (const sdbusplus::exception::exception& e)
1694     {
1695         log<level::DEBUG>("Failed to excute method",
1696                           entry("METHOD=%s", getSubTreeMethod),
1697                           entry("PATH=%s", userMgrObjBasePath));
1698         return;
1699     }
1700     bool updateRequired = false;
1701     UsersTbl* userData = &usersTbl;
1702     // user index 0 is reserved, starts with 1
1703     for (size_t usrIdx = 1; usrIdx <= ipmiMaxUsers; ++usrIdx)
1704     {
1705         if ((userData->user[usrIdx].userInSystem) &&
1706             (userData->user[usrIdx].userName[0] != '\0'))
1707         {
1708             std::vector<std::string> usrGrps;
1709             std::string usrPriv;
1710 
1711             std::string userName(
1712                 reinterpret_cast<char*>(userData->user[usrIdx].userName), 0,
1713                 ipmiMaxUserName);
1714             sdbusplus::message::object_path tempUserPath(userObjBasePath);
1715             tempUserPath /= userName;
1716             std::string usersPath(tempUserPath);
1717 
1718             auto usrObj = managedObjs.find(usersPath);
1719             if (usrObj != managedObjs.end())
1720             {
1721                 bool usrEnabled = false;
1722 
1723                 // User exist. Lets check and update other fileds
1724                 getUserObjProperties(usrObj->second, usrGrps, usrPriv,
1725                                      usrEnabled);
1726                 if (std::find(usrGrps.begin(), usrGrps.end(), ipmiGrpName) ==
1727                     usrGrps.end())
1728                 {
1729                     updateRequired = true;
1730                     // Group "ipmi" is removed so lets remove user in IPMI
1731                     deleteUserIndex(usrIdx);
1732                 }
1733                 else
1734                 {
1735                     // Group "ipmi" is present so lets update other properties
1736                     // in IPMI
1737                     uint8_t priv =
1738                         UserAccess::convertToIPMIPrivilege(usrPriv) & privMask;
1739                     // Update all channels priv, only if it is not equivalent to
1740                     // getUsrMgmtSyncIndex()
1741                     if (userData->user[usrIdx]
1742                             .userPrivAccess[getUsrMgmtSyncIndex()]
1743                             .privilege != priv)
1744                     {
1745                         updateRequired = true;
1746                         for (size_t chIndex = 0; chIndex < ipmiMaxChannels;
1747                              ++chIndex)
1748                         {
1749                             userData->user[usrIdx]
1750                                 .userPrivAccess[chIndex]
1751                                 .privilege = priv;
1752                         }
1753                     }
1754                     if (userData->user[usrIdx].userEnabled != usrEnabled)
1755                     {
1756                         updateRequired = true;
1757                         userData->user[usrIdx].userEnabled = usrEnabled;
1758                     }
1759                 }
1760 
1761                 // We are done with this obj. lets delete from MAP
1762                 managedObjs.erase(usrObj);
1763             }
1764             else
1765             {
1766                 updateRequired = true;
1767                 deleteUserIndex(usrIdx);
1768             }
1769         }
1770     }
1771 
1772     // Walk through remnaining managedObj users list
1773     // Add them to ipmi data base
1774     for (const auto& usrObj : managedObjs)
1775     {
1776         std::vector<std::string> usrGrps;
1777         std::string usrPriv, userName;
1778         bool usrEnabled = false;
1779         std::string usrObjPath = std::string(usrObj.first);
1780         if (getUserNameFromPath(usrObj.first.str, userName) != 0)
1781         {
1782             log<level::ERR>("Error in user object path");
1783             continue;
1784         }
1785         getUserObjProperties(usrObj.second, usrGrps, usrPriv, usrEnabled);
1786         // Add 'ipmi' group users
1787         if (std::find(usrGrps.begin(), usrGrps.end(), ipmiGrpName) !=
1788             usrGrps.end())
1789         {
1790             updateRequired = true;
1791             // CREATE NEW USER
1792             if (true != addUserEntry(userName, usrPriv, usrEnabled))
1793             {
1794                 break;
1795             }
1796         }
1797     }
1798 
1799     if (updateRequired)
1800     {
1801         // All userData slots update done. Lets write the data
1802         writeUserData();
1803     }
1804 
1805     return;
1806 }
1807 } // namespace ipmi
1808