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authorization.go
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authorization.go
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// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.
package app
import (
"database/sql"
"errors"
"net/http"
"strings"
"github.com/mattermost/mattermost/server/public/model"
"github.com/mattermost/mattermost/server/public/shared/mlog"
"github.com/mattermost/mattermost/server/public/shared/request"
)
func (a *App) SessionHasPermissionTo(session model.Session, permission *model.Permission) bool {
if session.IsUnrestricted() {
return true
}
return a.RolesGrantPermission(session.GetUserRoles(), permission.Id)
}
func (a *App) SessionHasPermissionToAny(session model.Session, permissions []*model.Permission) bool {
for _, perm := range permissions {
if a.SessionHasPermissionTo(session, perm) {
return true
}
}
return false
}
func (a *App) SessionHasPermissionToTeam(session model.Session, teamID string, permission *model.Permission) bool {
if teamID == "" {
return false
}
if session.IsUnrestricted() {
return true
}
teamMember := session.GetTeamByTeamId(teamID)
if teamMember != nil {
if a.RolesGrantPermission(teamMember.GetRoles(), permission.Id) {
return true
}
}
return a.RolesGrantPermission(session.GetUserRoles(), permission.Id)
}
// SessionHasPermissionToTeams returns true only if user has access to all teams.
func (a *App) SessionHasPermissionToTeams(c request.CTX, session model.Session, teamIDs []string, permission *model.Permission) bool {
if len(teamIDs) == 0 {
return true
}
for _, teamID := range teamIDs {
if teamID == "" {
return false
}
}
// Check session permission, if it allows access, no need to check teams.
if a.SessionHasPermissionTo(session, permission) {
return true
}
for _, teamID := range teamIDs {
tm := session.GetTeamByTeamId(teamID)
if tm != nil {
// If a team member has permission, then no need to check further.
if a.RolesGrantPermission(tm.GetRoles(), permission.Id) {
continue
}
}
return false
}
return true
}
func (a *App) SessionHasPermissionToChannel(c request.CTX, session model.Session, channelID string, permission *model.Permission) bool {
if channelID == "" {
return false
}
ids, err := a.Srv().Store().Channel().GetAllChannelMembersForUser(c, session.UserId, true, true)
var channelRoles []string
if err == nil {
if roles, ok := ids[channelID]; ok {
channelRoles = strings.Fields(roles)
if a.RolesGrantPermission(channelRoles, permission.Id) {
return true
}
}
}
channel, appErr := a.GetChannel(c, channelID)
if appErr != nil && appErr.StatusCode == http.StatusNotFound {
return false
}
if session.IsUnrestricted() {
return true
}
if appErr == nil && channel.TeamId != "" {
return a.SessionHasPermissionToTeam(session, channel.TeamId, permission)
}
return a.SessionHasPermissionTo(session, permission)
}
// SessionHasPermissionToChannels returns true only if user has access to all channels.
func (a *App) SessionHasPermissionToChannels(c request.CTX, session model.Session, channelIDs []string, permission *model.Permission) bool {
if len(channelIDs) == 0 {
return true
}
for _, channelID := range channelIDs {
if channelID == "" {
return false
}
}
// if System Roles (ie. Admin, TeamAdmin) allow permissions
// if so, no reason to check team
if a.SessionHasPermissionTo(session, permission) {
// make sure all channels exist, otherwise return false.
for _, channelID := range channelIDs {
_, appErr := a.GetChannel(c, channelID)
if appErr != nil && appErr.StatusCode == http.StatusNotFound {
return false
}
}
return true
}
ids, err := a.Srv().Store().Channel().GetAllChannelMembersForUser(c, session.UserId, true, true)
var channelRoles []string
for _, channelID := range channelIDs {
if err == nil {
// If a channel member has permission, then no need to check further.
if roles, ok := ids[channelID]; ok {
channelRoles = strings.Fields(roles)
if a.RolesGrantPermission(channelRoles, permission.Id) {
continue
}
}
}
return false
}
return true
}
func (a *App) SessionHasPermissionToGroup(session model.Session, groupID string, permission *model.Permission) bool {
groupMember, err := a.Srv().Store().Group().GetMember(groupID, session.UserId)
// don't reject immediately on ErrNoRows error because there's further authz logic below for non-groupmembers
if err != nil && !errors.Is(err, sql.ErrNoRows) {
return false
}
// each member of a group is implicitly considered to have the 'custom_group_user' role in that group, so if the user is a member of the
// group and custom_group_user on their system has the requested permission then return true
if groupMember != nil && a.RolesGrantPermission([]string{model.CustomGroupUserRoleId}, permission.Id) {
return true
}
// Not implemented: group-override schemes.
// ...otherwise check their system roles to see if they have the requested permission system-wide
return a.SessionHasPermissionTo(session, permission)
}
func (a *App) SessionHasPermissionToChannelByPost(session model.Session, postID string, permission *model.Permission) bool {
if postID == "" {
return false
}
if channelMember, err := a.Srv().Store().Channel().GetMemberForPost(postID, session.UserId, *a.Config().TeamSettings.ExperimentalViewArchivedChannels); err == nil {
if a.RolesGrantPermission(channelMember.GetRoles(), permission.Id) {
return true
}
}
if channel, err := a.Srv().Store().Channel().GetForPost(postID); err == nil {
if channel.TeamId != "" {
return a.SessionHasPermissionToTeam(session, channel.TeamId, permission)
}
}
return a.SessionHasPermissionTo(session, permission)
}
func (a *App) SessionHasPermissionToCategory(c request.CTX, session model.Session, userID, teamID, categoryId string) bool {
if a.SessionHasPermissionTo(session, model.PermissionEditOtherUsers) {
return true
}
category, err := a.GetSidebarCategory(c, categoryId)
return err == nil && category != nil && category.UserId == session.UserId && category.UserId == userID && category.TeamId == teamID
}
func (a *App) SessionHasPermissionToUser(session model.Session, userID string) bool {
if userID == "" {
return false
}
if session.IsUnrestricted() {
return true
}
if session.UserId == userID {
return true
}
if a.SessionHasPermissionTo(session, model.PermissionEditOtherUsers) {
return true
}
return false
}
func (a *App) SessionHasPermissionToUserOrBot(rctx request.CTX, session model.Session, userID string) bool {
if session.IsUnrestricted() {
return true
}
err := a.SessionHasPermissionToManageBot(rctx, session, userID)
if err == nil {
return true
}
if err.Id == "store.sql_bot.get.missing.app_error" && err.Where == "SqlBotStore.Get" {
if a.SessionHasPermissionToUser(session, userID) {
return true
}
}
return false
}
func (a *App) HasPermissionTo(askingUserId string, permission *model.Permission) bool {
user, err := a.GetUser(askingUserId)
if err != nil {
return false
}
roles := user.GetRoles()
return a.RolesGrantPermission(roles, permission.Id)
}
func (a *App) HasPermissionToTeam(c request.CTX, askingUserId string, teamID string, permission *model.Permission) bool {
if teamID == "" || askingUserId == "" {
return false
}
teamMember, _ := a.GetTeamMember(c, teamID, askingUserId)
if teamMember != nil && teamMember.DeleteAt == 0 {
if a.RolesGrantPermission(teamMember.GetRoles(), permission.Id) {
return true
}
}
return a.HasPermissionTo(askingUserId, permission)
}
func (a *App) HasPermissionToChannel(c request.CTX, askingUserId string, channelID string, permission *model.Permission) bool {
if channelID == "" || askingUserId == "" {
return false
}
// We call GetAllChannelMembersForUser instead of just getting
// a single member from the DB, because it's cache backed
// and this is a very frequent call.
ids, err := a.Srv().Store().Channel().GetAllChannelMembersForUser(c, askingUserId, true, true)
var channelRoles []string
if err == nil {
if roles, ok := ids[channelID]; ok {
channelRoles = strings.Fields(roles)
if a.RolesGrantPermission(channelRoles, permission.Id) {
return true
}
}
}
channel, appErr := a.GetChannel(c, channelID)
if appErr == nil {
return a.HasPermissionToTeam(c, askingUserId, channel.TeamId, permission)
}
return a.HasPermissionTo(askingUserId, permission)
}
func (a *App) HasPermissionToChannelByPost(c request.CTX, askingUserId string, postID string, permission *model.Permission) bool {
if channelMember, err := a.Srv().Store().Channel().GetMemberForPost(postID, askingUserId, *a.Config().TeamSettings.ExperimentalViewArchivedChannels); err == nil {
if a.RolesGrantPermission(channelMember.GetRoles(), permission.Id) {
return true
}
}
if channel, err := a.Srv().Store().Channel().GetForPost(postID); err == nil {
return a.HasPermissionToTeam(c, askingUserId, channel.TeamId, permission)
}
return a.HasPermissionTo(askingUserId, permission)
}
func (a *App) HasPermissionToUser(askingUserId string, userID string) bool {
if askingUserId == userID {
return true
}
if a.HasPermissionTo(askingUserId, model.PermissionEditOtherUsers) {
return true
}
return false
}
func (a *App) RolesGrantPermission(roleNames []string, permissionId string) bool {
roles, err := a.GetRolesByNames(roleNames)
if err != nil {
// This should only happen if something is very broken. We can't realistically
// recover the situation, so deny permission and log an error.
mlog.Error("Failed to get roles from database with role names: "+strings.Join(roleNames, ",")+" ", mlog.Err(err))
return false
}
for _, role := range roles {
if role.DeleteAt != 0 {
continue
}
permissions := role.Permissions
for _, permission := range permissions {
if permission == permissionId {
return true
}
}
}
return false
}
// SessionHasPermissionToManageBot returns nil if the session has access to manage the given bot.
// This function deviates from other authorization checks in returning an error instead of just
// a boolean, allowing the permission failure to be exposed with more granularity.
func (a *App) SessionHasPermissionToManageBot(rctx request.CTX, session model.Session, botUserId string) *model.AppError {
existingBot, err := a.GetBot(rctx, botUserId, true)
if err != nil {
return err
}
if session.IsUnrestricted() {
return nil
}
if existingBot.OwnerId == session.UserId {
if !a.SessionHasPermissionTo(session, model.PermissionManageBots) {
if !a.SessionHasPermissionTo(session, model.PermissionReadBots) {
// If the user doesn't have permission to read bots, pretend as if
// the bot doesn't exist at all.
return model.MakeBotNotFoundError("permissions", botUserId)
}
return model.MakePermissionError(&session, []*model.Permission{model.PermissionManageBots})
}
} else {
if !a.SessionHasPermissionTo(session, model.PermissionManageOthersBots) {
if !a.SessionHasPermissionTo(session, model.PermissionReadOthersBots) {
// If the user doesn't have permission to read others' bots,
// pretend as if the bot doesn't exist at all.
return model.MakeBotNotFoundError("permissions", botUserId)
}
return model.MakePermissionError(&session, []*model.Permission{model.PermissionManageOthersBots})
}
}
return nil
}
func (a *App) SessionHasPermissionToReadChannel(c request.CTX, session model.Session, channel *model.Channel) bool {
if session.IsUnrestricted() {
return true
}
return a.HasPermissionToReadChannel(c, session.UserId, channel)
}
func (a *App) HasPermissionToReadChannel(c request.CTX, userID string, channel *model.Channel) bool {
if !*a.Config().TeamSettings.ExperimentalViewArchivedChannels && channel.DeleteAt != 0 {
return false
}
if a.HasPermissionToChannel(c, userID, channel.Id, model.PermissionReadChannelContent) {
return true
}
if channel.Type == model.ChannelTypeOpen && !*a.Config().ComplianceSettings.Enable {
return a.HasPermissionToTeam(c, userID, channel.TeamId, model.PermissionReadPublicChannel)
}
return false
}
func (a *App) HasPermissionToChannelMemberCount(c request.CTX, userID string, channel *model.Channel) bool {
if !*a.Config().TeamSettings.ExperimentalViewArchivedChannels && channel.DeleteAt != 0 {
return false
}
if a.HasPermissionToChannel(c, userID, channel.Id, model.PermissionReadChannelContent) {
return true
}
if channel.Type == model.ChannelTypeOpen {
return a.HasPermissionToTeam(c, userID, channel.TeamId, model.PermissionListTeamChannels)
}
return false
}