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1 | package PVE::API2::AccessControl; | |
2 | ||
3 | use strict; | |
4 | use warnings; | |
5 | ||
6 | use PVE::Exception qw(raise raise_perm_exc); | |
7 | use PVE::SafeSyslog; | |
8 | use PVE::RPCEnvironment; | |
9 | use PVE::Cluster qw(cfs_read_file); | |
10 | use PVE::RESTHandler; | |
11 | use PVE::AccessControl; | |
12 | use PVE::JSONSchema qw(get_standard_option); | |
13 | use PVE::API2::Domains; | |
14 | use PVE::API2::User; | |
15 | use PVE::API2::Group; | |
16 | use PVE::API2::Role; | |
17 | use PVE::API2::ACL; | |
18 | ||
19 | use base qw(PVE::RESTHandler); | |
20 | ||
21 | __PACKAGE__->register_method ({ | |
22 | subclass => "PVE::API2::User", | |
23 | path => 'users', | |
24 | }); | |
25 | ||
26 | __PACKAGE__->register_method ({ | |
27 | subclass => "PVE::API2::Group", | |
28 | path => 'groups', | |
29 | }); | |
30 | ||
31 | __PACKAGE__->register_method ({ | |
32 | subclass => "PVE::API2::Role", | |
33 | path => 'roles', | |
34 | }); | |
35 | ||
36 | __PACKAGE__->register_method ({ | |
37 | subclass => "PVE::API2::ACL", | |
38 | path => 'acl', | |
39 | }); | |
40 | ||
41 | __PACKAGE__->register_method ({ | |
42 | subclass => "PVE::API2::Domains", | |
43 | path => 'domains', | |
44 | }); | |
45 | ||
46 | __PACKAGE__->register_method ({ | |
47 | name => 'index', | |
48 | path => '', | |
49 | method => 'GET', | |
50 | description => "Directory index.", | |
51 | permissions => { | |
52 | user => 'all', | |
53 | }, | |
54 | parameters => { | |
55 | additionalProperties => 0, | |
56 | properties => {}, | |
57 | }, | |
58 | returns => { | |
59 | type => 'array', | |
60 | items => { | |
61 | type => "object", | |
62 | properties => { | |
63 | subdir => { type => 'string' }, | |
64 | }, | |
65 | }, | |
66 | links => [ { rel => 'child', href => "{subdir}" } ], | |
67 | }, | |
68 | code => sub { | |
69 | my ($param) = @_; | |
70 | ||
71 | my $res = []; | |
72 | ||
73 | my $ma = __PACKAGE__->method_attributes(); | |
74 | ||
75 | foreach my $info (@$ma) { | |
76 | next if !$info->{subclass}; | |
77 | ||
78 | my $subpath = $info->{match_re}->[0]; | |
79 | ||
80 | push @$res, { subdir => $subpath }; | |
81 | } | |
82 | ||
83 | push @$res, { subdir => 'ticket' }; | |
84 | push @$res, { subdir => 'password' }; | |
85 | ||
86 | return $res; | |
87 | }}); | |
88 | ||
89 | ||
90 | my $verify_auth = sub { | |
91 | my ($rpcenv, $username, $pw_or_ticket, $path, $privs) = @_; | |
92 | ||
93 | my $normpath = PVE::AccessControl::normalize_path($path); | |
94 | ||
95 | my $ticketuser; | |
96 | if (($ticketuser = PVE::AccessControl::verify_ticket($pw_or_ticket, 1)) && | |
97 | ($ticketuser eq $username)) { | |
98 | # valid ticket | |
99 | } elsif (PVE::AccessControl::verify_vnc_ticket($pw_or_ticket, $username, $normpath, 1)) { | |
100 | # valid vnc ticket | |
101 | } else { | |
102 | $username = PVE::AccessControl::authenticate_user($username, $pw_or_ticket); | |
103 | } | |
104 | ||
105 | my $privlist = [ PVE::Tools::split_list($privs) ]; | |
106 | if (!($normpath && scalar(@$privlist) && $rpcenv->check($username, $normpath, $privlist))) { | |
107 | die "no permission ($path, $privs)\n"; | |
108 | } | |
109 | ||
110 | return { username => $username }; | |
111 | }; | |
112 | ||
113 | my $create_ticket = sub { | |
114 | my ($rpcenv, $username, $pw_or_ticket) = @_; | |
115 | ||
116 | my $ticketuser; | |
117 | if (($ticketuser = PVE::AccessControl::verify_ticket($pw_or_ticket, 1)) && | |
118 | ($ticketuser eq 'root@pam' || $ticketuser eq $username)) { | |
119 | # valid ticket. Note: root@pam can create tickets for other users | |
120 | } else { | |
121 | $username = PVE::AccessControl::authenticate_user($username, $pw_or_ticket); | |
122 | } | |
123 | ||
124 | my $ticket = PVE::AccessControl::assemble_ticket($username); | |
125 | my $csrftoken = PVE::AccessControl::assemble_csrf_prevention_token($username); | |
126 | ||
127 | return { | |
128 | ticket => $ticket, | |
129 | username => $username, | |
130 | CSRFPreventionToken => $csrftoken, | |
131 | }; | |
132 | }; | |
133 | ||
134 | my $compute_api_permission = sub { | |
135 | my ($rpcenv, $authuser) = @_; | |
136 | ||
137 | my $usercfg = $rpcenv->{user_cfg}; | |
138 | ||
139 | my $nodelist = PVE::Cluster::get_nodelist(); | |
140 | my $vmlist = PVE::Cluster::get_vmlist() || {}; | |
141 | my $idlist = $vmlist->{ids} || {}; | |
142 | ||
143 | my $cfg = PVE::Storage::config(); | |
144 | my @sids = PVE::Storage::storage_ids ($cfg); | |
145 | ||
146 | my $res = { | |
147 | vms => {}, | |
148 | storage => {}, | |
149 | access => {}, | |
150 | nodes => {}, | |
151 | dc => {}, | |
152 | }; | |
153 | ||
154 | my $extract_vm_caps = sub { | |
155 | my ($path) = @_; | |
156 | ||
157 | my $perm = $rpcenv->permissions($authuser, $path); | |
158 | foreach my $priv (keys %$perm) { | |
159 | next if !($priv eq 'Permissions.Modify' || $priv =~ m/^VM\./); | |
160 | $res->{vms}->{$priv} = 1; | |
161 | } | |
162 | }; | |
163 | ||
164 | foreach my $pool (keys %{$usercfg->{pools}}) { | |
165 | &$extract_vm_caps("/pool/$pool"); | |
166 | } | |
167 | ||
168 | foreach my $vmid (keys %$idlist, '__phantom__') { | |
169 | &$extract_vm_caps("/vms/$vmid"); | |
170 | } | |
171 | ||
172 | foreach my $storeid (@sids, '__phantom__') { | |
173 | my $perm = $rpcenv->permissions($authuser, "/storage/$storeid"); | |
174 | foreach my $priv (keys %$perm) { | |
175 | next if !($priv eq 'Permissions.Modify' || $priv =~ m/^Datastore\./); | |
176 | $res->{storage}->{$priv} = 1; | |
177 | } | |
178 | } | |
179 | ||
180 | foreach my $path (('/access/groups')) { | |
181 | my $perm = $rpcenv->permissions($authuser, $path); | |
182 | foreach my $priv (keys %$perm) { | |
183 | next if $priv !~ m/^(User|Group)\./; | |
184 | $res->{access}->{$priv} = 1; | |
185 | } | |
186 | } | |
187 | ||
188 | foreach my $group (keys %{$usercfg->{users}->{$authuser}->{groups}}, '__phantom__') { | |
189 | my $perm = $rpcenv->permissions($authuser, "/access/groups/$group"); | |
190 | if ($perm->{'User.Modify'}) { | |
191 | $res->{access}->{'User.Modify'} = 1; | |
192 | } | |
193 | } | |
194 | ||
195 | foreach my $node (@$nodelist) { | |
196 | my $perm = $rpcenv->permissions($authuser, "/nodes/$node"); | |
197 | foreach my $priv (keys %$perm) { | |
198 | next if $priv !~ m/^Sys\./; | |
199 | $res->{nodes}->{$priv} = 1; | |
200 | } | |
201 | } | |
202 | ||
203 | my $perm = $rpcenv->permissions($authuser, "/"); | |
204 | $res->{dc}->{'Sys.Audit'} = 1 if $perm->{'Sys.Audit'}; | |
205 | ||
206 | return $res; | |
207 | }; | |
208 | ||
209 | __PACKAGE__->register_method ({ | |
210 | name => 'create_ticket', | |
211 | path => 'ticket', | |
212 | method => 'POST', | |
213 | permissions => { | |
214 | description => "You need to pass valid credientials.", | |
215 | user => 'world' | |
216 | }, | |
217 | protected => 1, # else we can't access shadow files | |
218 | description => "Create or verify authentication ticket.", | |
219 | parameters => { | |
220 | additionalProperties => 0, | |
221 | properties => { | |
222 | username => { | |
223 | description => "User name", | |
224 | type => 'string', | |
225 | maxLength => 64, | |
226 | }, | |
227 | realm => get_standard_option('realm', { | |
228 | description => "You can optionally pass the realm using this parameter. Normally the realm is simply added to the username <username>\@<relam>.", | |
229 | optional => 1}), | |
230 | password => { | |
231 | description => "The secret password. This can also be a valid ticket.", | |
232 | type => 'string', | |
233 | }, | |
234 | path => { | |
235 | description => "Verify ticket, and check if user have access 'privs' on 'path'", | |
236 | type => 'string', | |
237 | requires => 'privs', | |
238 | optional => 1, | |
239 | maxLength => 64, | |
240 | }, | |
241 | privs => { | |
242 | description => "Verify ticket, and check if user have access 'privs' on 'path'", | |
243 | type => 'string' , format => 'pve-priv-list', | |
244 | requires => 'path', | |
245 | optional => 1, | |
246 | maxLength => 64, | |
247 | }, | |
248 | } | |
249 | }, | |
250 | returns => { | |
251 | type => "object", | |
252 | properties => { | |
253 | username => { type => 'string' }, | |
254 | ticket => { type => 'string', optional => 1}, | |
255 | CSRFPreventionToken => { type => 'string', optional => 1 }, | |
256 | } | |
257 | }, | |
258 | code => sub { | |
259 | my ($param) = @_; | |
260 | ||
261 | my $username = $param->{username}; | |
262 | $username .= "\@$param->{realm}" if $param->{realm}; | |
263 | ||
264 | my $rpcenv = PVE::RPCEnvironment::get(); | |
265 | ||
266 | my $res; | |
267 | eval { | |
268 | # test if user exists and is enabled | |
269 | $rpcenv->check_user_enabled($username); | |
270 | ||
271 | if ($param->{path} && $param->{privs}) { | |
272 | $res = &$verify_auth($rpcenv, $username, $param->{password}, | |
273 | $param->{path}, $param->{privs}); | |
274 | } else { | |
275 | $res = &$create_ticket($rpcenv, $username, $param->{password}); | |
276 | } | |
277 | }; | |
278 | if (my $err = $@) { | |
279 | my $clientip = $rpcenv->get_client_ip() || ''; | |
280 | syslog('err', "authentication failure; rhost=$clientip user=$username msg=$err"); | |
281 | # do not return any info to prevent user enumeration attacks | |
282 | die PVE::Exception->new("authentication failure\n", code => 401); | |
283 | } | |
284 | ||
285 | $res->{cap} = &$compute_api_permission($rpcenv, $username); | |
286 | ||
287 | PVE::Cluster::log_msg('info', 'root@pam', "successful auth for user '$username'"); | |
288 | ||
289 | return $res; | |
290 | }}); | |
291 | ||
292 | __PACKAGE__->register_method ({ | |
293 | name => 'change_passsword', | |
294 | path => 'password', | |
295 | method => 'PUT', | |
296 | permissions => { | |
297 | description => "Each user is allowed to change his own password. A user can change the password of another user if he has 'Realm.AllocateUser' (on the realm of user <userid>) and 'User.Modify' permission on /access/groups/<group> on a group where user <userid> is member of.", | |
298 | check => [ 'or', | |
299 | ['userid-param', 'self'], | |
300 | [ 'and', | |
301 | [ 'userid-param', 'Realm.AllocateUser'], | |
302 | [ 'userid-group', ['User.Modify']] | |
303 | ] | |
304 | ], | |
305 | }, | |
306 | protected => 1, # else we can't access shadow files | |
307 | description => "Change user password.", | |
308 | parameters => { | |
309 | additionalProperties => 0, | |
310 | properties => { | |
311 | userid => get_standard_option('userid'), | |
312 | password => { | |
313 | description => "The new password.", | |
314 | type => 'string', | |
315 | minLength => 5, | |
316 | maxLength => 64, | |
317 | }, | |
318 | } | |
319 | }, | |
320 | returns => { type => "null" }, | |
321 | code => sub { | |
322 | my ($param) = @_; | |
323 | ||
324 | my $rpcenv = PVE::RPCEnvironment::get(); | |
325 | my $authuser = $rpcenv->get_user(); | |
326 | ||
327 | my ($userid, $ruid, $realm) = PVE::AccessControl::verify_username($param->{userid}); | |
328 | ||
329 | $rpcenv->check_user_exist($userid); | |
330 | ||
331 | if ($authuser eq 'root@pam') { | |
332 | # OK - root can change anything | |
333 | } else { | |
334 | if ($authuser eq $userid) { | |
335 | $rpcenv->check_user_enabled($userid); | |
336 | # OK - each user can change its own password | |
337 | } else { | |
338 | # only root may change root password | |
339 | raise_perm_exc() if $userid eq 'root@pam'; | |
340 | # do not allow to change system user passwords | |
341 | raise_perm_exc() if $realm eq 'pam'; | |
342 | } | |
343 | } | |
344 | ||
345 | PVE::AccessControl::domain_set_password($realm, $ruid, $param->{password}); | |
346 | ||
347 | PVE::Cluster::log_msg('info', 'root@pam', "changed password for user '$userid'"); | |
348 | ||
349 | return undef; | |
350 | }}); | |
351 | ||
352 | 1; |