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7ac48069 | 1 | /* $Id$ |
73cf66ba | 2 | * |
7ac48069 | 3 | * Check access to queries |
73cf66ba | 4 | * |
7ac48069 | 5 | * Copyright (C) 1987-1998 by the Massachusetts Institute of Technology |
6 | * For copying and distribution information, please see the file | |
7 | * <mit-copyright.h>. | |
73cf66ba | 8 | */ |
9 | ||
73cf66ba | 10 | #include <mit-copyright.h> |
73cf66ba | 11 | #include "mr_server.h" |
7ac48069 | 12 | #include "qrtn.h" |
03c05291 | 13 | #include "query.h" |
7ac48069 | 14 | |
73cf66ba | 15 | #include <ctype.h> |
7ac48069 | 16 | #include <stdlib.h> |
17 | ||
73cf66ba | 18 | EXEC SQL INCLUDE sqlca; |
7ac48069 | 19 | |
20 | RCSID("$Header$"); | |
73cf66ba | 21 | |
22 | extern char *whoami; | |
03c05291 | 23 | extern int dbms_errno, mr_errcode; |
73cf66ba | 24 | |
03c05291 | 25 | EXEC SQL WHENEVER SQLERROR DO dbmserr(); |
73cf66ba | 26 | |
27 | ||
28 | /* Specialized Access Routines */ | |
29 | ||
30 | /* access_user - verify that client name equals specified login name | |
31 | * | |
32 | * - since field validation routines are called first, a users_id is | |
33 | * now in argv[0] instead of the login name. | |
34 | */ | |
35 | ||
5eaef520 | 36 | int access_user(struct query *q, char *argv[], client *cl) |
73cf66ba | 37 | { |
5eaef520 | 38 | if (cl->users_id != *(int *)argv[0]) |
39 | return MR_PERM; | |
40 | else | |
41 | return MR_SUCCESS; | |
73cf66ba | 42 | } |
43 | ||
44 | ||
45 | ||
46 | /* access_login - verify that client name equals specified login name | |
47 | * | |
48 | * argv[0...n] contain search info. q-> | |
49 | */ | |
50 | ||
5eaef520 | 51 | int access_login(struct query *q, char *argv[], client *cl) |
73cf66ba | 52 | { |
5eaef520 | 53 | EXEC SQL BEGIN DECLARE SECTION; |
54 | int id; | |
55 | EXEC SQL END DECLARE SECTION; | |
73cf66ba | 56 | |
5eaef520 | 57 | if (q->argc != 1) |
58 | return MR_ARGS; | |
03c05291 | 59 | |
5eaef520 | 60 | if (!strcmp(q->shortname, "gual")) |
61 | { | |
5906749e | 62 | EXEC SQL SELECT users_id INTO :id FROM users |
cc0ec904 | 63 | WHERE login = :argv[0] AND users_id != 0; |
5eaef520 | 64 | } |
65 | else if (!strcmp(q->shortname, "gubl")) | |
66 | { | |
03c05291 | 67 | EXEC SQL SELECT users_id INTO :id FROM users u |
cc0ec904 | 68 | WHERE u.login = :argv[0] AND u.users_id != 0; |
5eaef520 | 69 | } |
70 | else if (!strcmp(q->shortname, "guau")) | |
71 | { | |
5906749e | 72 | EXEC SQL SELECT users_id INTO :id FROM users |
73 | WHERE unix_uid = :argv[0] AND users_id != 0; | |
5eaef520 | 74 | } |
75 | else if (!strcmp(q->shortname, "gubu")) | |
76 | { | |
03c05291 | 77 | EXEC SQL SELECT users_id INTO :id FROM users u |
78 | WHERE u.unix_uid = :argv[0] AND u.users_id != 0; | |
73cf66ba | 79 | } |
80 | ||
5eaef520 | 81 | if (sqlca.sqlcode == SQL_NO_MATCH) |
82 | return MR_NO_MATCH; /* ought to be MR_USER, but this is what | |
83 | gual returns, so we have to be consistent */ | |
84 | else if (sqlca.sqlerrd[2] != 1 || id != cl->users_id) | |
85 | return MR_PERM; | |
86 | else | |
87 | return MR_SUCCESS; | |
73cf66ba | 88 | } |
89 | ||
90 | ||
91 | ||
92 | /* access_list - check access for most list operations | |
93 | * | |
94 | * Inputs: argv[0] - list_id | |
95 | * q - query name | |
96 | * argv[2] - member ID (only for queries "amtl" and "dmfl") | |
e688520a | 97 | * argv[7] - group ID (only for query "ulis") |
73cf66ba | 98 | * cl - client name |
99 | * | |
100 | * - check that client is a member of the access control list | |
101 | * - OR, if the query is add_member_to_list or delete_member_from_list | |
102 | * and the list is public, allow access if client = member | |
103 | */ | |
104 | ||
5eaef520 | 105 | int access_list(struct query *q, char *argv[], client *cl) |
73cf66ba | 106 | { |
5eaef520 | 107 | EXEC SQL BEGIN DECLARE SECTION; |
108 | int list_id, acl_id, flags, gid, users_id; | |
e688520a | 109 | char acl_type[LIST_ACL_TYPE_SIZE], name[LIST_NAME_SIZE], *newname; |
5eaef520 | 110 | EXEC SQL END DECLARE SECTION; |
111 | int status; | |
112 | ||
113 | list_id = *(int *)argv[0]; | |
17f090e1 | 114 | EXEC SQL SELECT acl_id, acl_type, gid, publicflg, name |
115 | INTO :acl_id, :acl_type, :gid, :flags, :name | |
5eaef520 | 116 | FROM list |
117 | WHERE list_id = :list_id; | |
118 | ||
119 | if (sqlca.sqlerrd[2] != 1) | |
120 | return MR_INTERNAL; | |
121 | ||
122 | /* if amtl or dmfl and list is public allow client to add or delete self */ | |
123 | if (((!strcmp("amtl", q->shortname) && flags) || | |
124 | (!strcmp("dmfl", q->shortname)))) | |
125 | { | |
126 | if (!strcmp("USER", argv[1]) && *(int *)argv[2] == cl->users_id) | |
127 | return MR_SUCCESS; | |
128 | if (!strcmp("KERBEROS", argv[1]) && *(int *)argv[2] == -cl->client_id) | |
129 | return MR_SUCCESS; | |
130 | } /* if update_list, don't allow them to change the GID or rename to | |
131 | a username other than their own */ | |
132 | else if (!strcmp("ulis", q->shortname)) | |
133 | { | |
134 | if (!strcmp(argv[7], UNIQUE_GID)) | |
135 | { | |
136 | if (gid != -1) | |
137 | return MR_PERM; | |
138 | } | |
139 | else | |
140 | { | |
141 | if (gid != atoi(argv[7])) | |
142 | return MR_PERM; | |
143 | } | |
d83ee5a2 | 144 | newname = argv[1]; |
145 | EXEC SQL SELECT users_id INTO :users_id FROM users | |
5eaef520 | 146 | WHERE login = :newname; |
17f090e1 | 147 | if ((sqlca.sqlcode != SQL_NO_MATCH) && strcmp(strtrim(name), newname) && |
148 | (users_id != cl->users_id)) | |
5eaef520 | 149 | return MR_PERM; |
73cf66ba | 150 | } |
151 | ||
5eaef520 | 152 | /* check for client in access control list */ |
153 | status = find_member(acl_type, acl_id, cl); | |
154 | if (!status) | |
155 | return MR_PERM; | |
73cf66ba | 156 | |
5eaef520 | 157 | return MR_SUCCESS; |
73cf66ba | 158 | } |
159 | ||
160 | ||
161 | /* access_visible_list - allow access to list only if it is not hidden, | |
162 | * or if the client is on the ACL | |
163 | * | |
164 | * Inputs: argv[0] - list_id | |
165 | * cl - client identifier | |
166 | */ | |
167 | ||
5eaef520 | 168 | int access_visible_list(struct query *q, char *argv[], client *cl) |
73cf66ba | 169 | { |
5eaef520 | 170 | EXEC SQL BEGIN DECLARE SECTION; |
171 | int list_id, acl_id, flags ; | |
e688520a | 172 | char acl_type[LIST_ACL_TYPE_SIZE]; |
5eaef520 | 173 | EXEC SQL END DECLARE SECTION; |
174 | int status; | |
175 | ||
176 | list_id = *(int *)argv[0]; | |
177 | EXEC SQL SELECT hidden, acl_id, acl_type | |
178 | INTO :flags, :acl_id, :acl_type | |
179 | FROM list | |
180 | WHERE list_id = :list_id; | |
181 | if (sqlca.sqlerrd[2] != 1) | |
182 | return MR_INTERNAL; | |
183 | if (!flags) | |
184 | return MR_SUCCESS; | |
185 | ||
186 | /* check for client in access control list */ | |
187 | status = find_member(acl_type, acl_id, cl); | |
188 | if (!status) | |
189 | return MR_PERM; | |
190 | ||
191 | return MR_SUCCESS; | |
73cf66ba | 192 | } |
193 | ||
194 | ||
195 | /* access_vis_list_by_name - allow access to list only if it is not hidden, | |
196 | * or if the client is on the ACL | |
197 | * | |
198 | * Inputs: argv[0] - list name | |
199 | * cl - client identifier | |
200 | */ | |
201 | ||
5eaef520 | 202 | int access_vis_list_by_name(struct query *q, char *argv[], client *cl) |
73cf66ba | 203 | { |
5eaef520 | 204 | EXEC SQL BEGIN DECLARE SECTION; |
205 | int acl_id, flags, rowcount; | |
e688520a | 206 | char acl_type[LIST_ACL_TYPE_SIZE], *listname; |
5eaef520 | 207 | EXEC SQL END DECLARE SECTION; |
208 | int status; | |
209 | ||
210 | listname = argv[0]; | |
211 | EXEC SQL SELECT hidden, acl_id, acl_type INTO :flags, :acl_id, :acl_type | |
212 | FROM list WHERE name = :listname; | |
213 | ||
214 | rowcount = sqlca.sqlerrd[2]; | |
215 | if (rowcount > 1) | |
216 | return MR_WILDCARD; | |
217 | if (rowcount == 0) | |
218 | return MR_NO_MATCH; | |
219 | if (!flags) | |
220 | return MR_SUCCESS; | |
221 | ||
222 | /* check for client in access control list */ | |
223 | status = find_member(acl_type, acl_id, cl); | |
224 | if (!status) | |
225 | return MR_PERM; | |
226 | ||
227 | return MR_SUCCESS; | |
73cf66ba | 228 | } |
229 | ||
230 | ||
231 | /* access_member - allow user to access member of type "USER" and name matches | |
f3c08a60 | 232 | * username, or to access member of type "KERBEROS" and the principal matches |
233 | * the user, or to access member of type "LIST" and list is one that user is | |
73cf66ba | 234 | * on the acl of, or the list is visible. |
235 | */ | |
236 | ||
5eaef520 | 237 | int access_member(struct query *q, char *argv[], client *cl) |
73cf66ba | 238 | { |
5eaef520 | 239 | if (!strcmp(argv[0], "LIST") || !strcmp(argv[0], "RLIST")) |
240 | return access_visible_list(q, &argv[1], cl); | |
73cf66ba | 241 | |
5eaef520 | 242 | if (!strcmp(argv[0], "USER") || !strcmp(argv[0], "RUSER")) |
243 | { | |
244 | if (cl->users_id == *(int *)argv[1]) | |
245 | return MR_SUCCESS; | |
73cf66ba | 246 | } |
247 | ||
5eaef520 | 248 | if (!strcmp(argv[0], "KERBEROS") || !strcmp(argv[0], "RKERBEROS")) |
249 | { | |
250 | if (cl->client_id == -*(int *)argv[1]) | |
251 | return MR_SUCCESS; | |
73cf66ba | 252 | } |
253 | ||
5eaef520 | 254 | return MR_PERM; |
73cf66ba | 255 | } |
256 | ||
257 | ||
258 | /* access_qgli - special access routine for Qualified_get_lists. Allows | |
259 | * access iff argv[0] == "TRUE" and argv[2] == "FALSE". | |
260 | */ | |
261 | ||
5eaef520 | 262 | int access_qgli(struct query *q, char *argv[], client *cl) |
73cf66ba | 263 | { |
5eaef520 | 264 | if (!strcmp(argv[0], "TRUE") && !strcmp(argv[2], "FALSE")) |
265 | return MR_SUCCESS; | |
266 | return MR_PERM; | |
73cf66ba | 267 | } |
268 | ||
269 | ||
270 | /* access_service - allow access if user is on ACL of service. Don't | |
271 | * allow access if a wildcard is used. | |
272 | */ | |
273 | ||
5eaef520 | 274 | int access_service(struct query *q, char *argv[], client *cl) |
73cf66ba | 275 | { |
5eaef520 | 276 | EXEC SQL BEGIN DECLARE SECTION; |
277 | int acl_id; | |
e688520a | 278 | char *name, acl_type[LIST_ACL_TYPE_SIZE]; |
5eaef520 | 279 | EXEC SQL END DECLARE SECTION; |
280 | int status; | |
281 | char *c; | |
282 | ||
283 | name = argv[0]; | |
284 | for (c = name; *c; c++) | |
285 | { | |
286 | if (islower(*c)) | |
287 | *c = toupper(*c); | |
288 | } | |
289 | EXEC SQL SELECT acl_id, acl_type INTO :acl_id, :acl_type FROM servers | |
290 | WHERE name = :name; | |
291 | if (sqlca.sqlerrd[2] > 1) | |
292 | return MR_PERM; | |
293 | ||
294 | /* check for client in access control list */ | |
295 | status = find_member(acl_type, acl_id, cl); | |
296 | if (!status) | |
297 | return MR_PERM; | |
298 | ||
299 | return MR_SUCCESS; | |
73cf66ba | 300 | } |
301 | ||
302 | ||
303 | /* access_filesys - verify that client is owner or on owners list of filesystem | |
304 | * named by argv[0] | |
305 | */ | |
306 | ||
5eaef520 | 307 | int access_filesys(struct query *q, char *argv[], client *cl) |
73cf66ba | 308 | { |
5eaef520 | 309 | EXEC SQL BEGIN DECLARE SECTION; |
310 | int users_id, list_id; | |
311 | char *name; | |
312 | EXEC SQL END DECLARE SECTION; | |
313 | int status; | |
314 | ||
315 | name = argv[0]; | |
316 | EXEC SQL SELECT owner, owners INTO :users_id, :list_id FROM filesys | |
317 | WHERE label = :name; | |
318 | ||
319 | if (sqlca.sqlerrd[2] != 1) | |
320 | return MR_PERM; | |
321 | if (users_id == cl->users_id) | |
322 | return MR_SUCCESS; | |
323 | status = find_member("LIST", list_id, cl); | |
324 | if (status) | |
325 | return MR_SUCCESS; | |
326 | else | |
327 | return MR_PERM; | |
73cf66ba | 328 | } |
329 | ||
1beb5e23 | 330 | |
331 | /* access_host - successful if owner of host, or subnet containing host | |
332 | */ | |
333 | ||
5eaef520 | 334 | int access_host(struct query *q, char *argv[], client *cl) |
1beb5e23 | 335 | { |
5eaef520 | 336 | EXEC SQL BEGIN DECLARE SECTION; |
337 | int mid, sid, id; | |
e688520a | 338 | char mtype[MACHINE_OWNER_TYPE_SIZE], stype[SUBNET_OWNER_TYPE_SIZE]; |
5eaef520 | 339 | EXEC SQL END DECLARE SECTION; |
340 | int status; | |
341 | ||
17f090e1 | 342 | if (q->type == RETRIEVE) |
343 | { | |
344 | if (strcmp(argv[0], "*") || strcmp(argv[1], "*") || | |
345 | strcmp(argv[2], "*") || strcmp(argv[3], "*")) | |
346 | return MR_SUCCESS; | |
347 | else | |
348 | return MR_PERM; | |
349 | } | |
9e252e6f | 350 | |
5eaef520 | 351 | if (q->type == APPEND) |
352 | { | |
17f090e1 | 353 | /* Non-query owner must set use to zero */ |
354 | if (atoi(argv[6]) != 0) | |
355 | return MR_PERM; | |
356 | ||
9e252e6f | 357 | /* ... and start the hostname with a letter */ |
358 | if (isdigit(argv[0][0])) | |
359 | return MR_BAD_CHAR; | |
360 | ||
5eaef520 | 361 | id = *(int *)argv[8]; |
362 | EXEC SQL SELECT s.owner_type, s.owner_id | |
363 | INTO :stype, :sid FROM subnet s | |
364 | WHERE s.snet_id = :id; | |
365 | mid = 0; | |
17f090e1 | 366 | |
367 | if (find_member(stype, sid, cl)) | |
5eaef520 | 368 | return MR_SUCCESS; |
369 | else | |
370 | return MR_PERM; | |
371 | } | |
17f090e1 | 372 | else /* q-type == UPDATE */ |
5eaef520 | 373 | { |
17f090e1 | 374 | EXEC SQL BEGIN DECLARE SECTION; |
375 | int status, acomment, use, ocomment, snid; | |
e688520a | 376 | char contact[MACHINE_CONTACT_SIZE], address[MACHINE_ADDRESS_SIZE]; |
9e252e6f | 377 | char name[MACHINE_NAME_SIZE]; |
17f090e1 | 378 | EXEC SQL END DECLARE SECTION; |
379 | ||
5eaef520 | 380 | id = *(int *)argv[0]; |
9e252e6f | 381 | EXEC SQL SELECT m.name, m.use, m.contact, m.status, m.address, |
382 | m.owner_type, m.owner_id, m.acomment, m.ocomment, m.snet_id, | |
383 | s.owner_type, s.owner_id INTO :name, :use, :contact, :status, | |
384 | :address, :mtype, :mid, :acomment, :ocomment, :snid, :stype, :sid | |
17f090e1 | 385 | FROM machine m, subnet s |
386 | WHERE m.mach_id = :id AND s.snet_id = m.snet_id; | |
387 | if (dbms_errno) | |
388 | return mr_errcode; | |
389 | ||
390 | /* non-query-owner cannot change use or ocomment */ | |
391 | if ((use != atoi(argv[7])) || (ocomment != *(int *)argv[14])) | |
392 | return MR_PERM; | |
393 | ||
9e252e6f | 394 | /* or rename to start with digit */ |
395 | if (isdigit(argv[1][0]) && strcmp(strtrim(name), argv[1])) | |
396 | return MR_BAD_CHAR; | |
397 | ||
17f090e1 | 398 | if (!find_member(stype, sid, cl)) |
399 | { | |
400 | if (find_member(mtype, mid, cl)) | |
401 | { | |
402 | /* host owner also cannot change contact, status, address, | |
403 | owner, or acomment */ | |
404 | if (strcmp(argv[6], strtrim(contact)) || | |
405 | (status != atoi(argv[8])) || | |
406 | strcmp(argv[10], strtrim(address)) || | |
407 | strcmp(argv[11], strtrim(mtype)) || | |
408 | (mid != *(int *)argv[12]) || (acomment != *(int *)argv[13])) | |
409 | return MR_PERM; | |
410 | } | |
411 | else | |
412 | return MR_PERM; | |
413 | } | |
414 | ||
415 | /* If moving to a new subnet, make sure user is on acl there */ | |
416 | id = *(int *)argv[9]; | |
417 | if (id != snid) | |
418 | { | |
419 | EXEC SQL SELECT owner_type, owner_id INTO :stype, :sid | |
420 | FROM subnet WHERE snet_id=:id; | |
421 | if (!find_member(stype, sid, cl)) | |
422 | return MR_PERM; | |
423 | } | |
5eaef520 | 424 | |
5eaef520 | 425 | return MR_SUCCESS; |
1beb5e23 | 426 | } |
1beb5e23 | 427 | } |
428 | ||
429 | ||
430 | /* access_ahal - check for adding a host alias. | |
431 | * successful if host has less then 2 aliases and (client is owner of | |
432 | * host or subnet). | |
433 | * If deleting an alias, any owner will do. | |
434 | */ | |
435 | ||
5eaef520 | 436 | int access_ahal(struct query *q, char *argv[], client *cl) |
1beb5e23 | 437 | { |
5eaef520 | 438 | EXEC SQL BEGIN DECLARE SECTION; |
439 | int cnt, id, mid, sid; | |
e688520a | 440 | char mtype[MACHINE_OWNER_TYPE_SIZE], stype[SUBNET_OWNER_TYPE_SIZE]; |
5eaef520 | 441 | EXEC SQL END DECLARE SECTION; |
442 | int status; | |
443 | ||
444 | if (q->type == RETRIEVE) | |
445 | return MR_SUCCESS; | |
446 | ||
447 | id = *(int *)argv[1]; | |
448 | ||
9e252e6f | 449 | if (q->type == APPEND && isdigit(argv[0][0])) |
450 | return MR_BAD_CHAR; | |
451 | ||
5eaef520 | 452 | EXEC SQL SELECT count(name) INTO :cnt from hostalias WHERE mach_id = :id; |
453 | if (dbms_errno) | |
454 | return mr_errcode; | |
455 | /* if the type is APPEND, this is ahal and we need to make sure there | |
456 | * will be no more than 2 aliases. If it's not, it must be dhal and | |
457 | * any owner will do. | |
458 | */ | |
459 | if (q->type == APPEND && cnt >= 2) | |
460 | return MR_PERM; | |
461 | EXEC SQL SELECT m.owner_type, m.owner_id, s.owner_type, s.owner_id | |
462 | INTO :mtype, :mid, :stype, :sid FROM machine m, subnet s | |
463 | WHERE m.mach_id = :id and s.snet_id = m.snet_id; | |
464 | status = find_member(mtype, mid, cl); | |
465 | if (status) | |
466 | return MR_SUCCESS; | |
467 | status = find_member(stype, sid, cl); | |
468 | if (status) | |
469 | return MR_SUCCESS; | |
470 | else | |
471 | return MR_PERM; | |
1beb5e23 | 472 | } |
7cf83f0f | 473 | |
474 | ||
7cf83f0f | 475 | /* access_snt - check for retrieving network structure |
476 | */ | |
477 | ||
5eaef520 | 478 | int access_snt(struct query *q, char *argv[], client *cl) |
7cf83f0f | 479 | { |
5eaef520 | 480 | if (q->type == RETRIEVE) |
481 | return MR_SUCCESS; | |
7cf83f0f | 482 | |
5eaef520 | 483 | return MR_PERM; |
7cf83f0f | 484 | } |
1a9a0a59 | 485 | |
486 | ||
487 | /* access_printer */ | |
488 | int access_printer(struct query *q, char *argv[], client *cl) | |
489 | { | |
490 | EXEC SQL BEGIN DECLARE SECTION; | |
491 | char type[PRINTSERVERS_OWNER_TYPE_SIZE]; | |
492 | int id, mach_id; | |
493 | EXEC SQL END DECLARE SECTION; | |
494 | int status; | |
495 | ||
496 | mach_id = *(int *)argv[PRN_RM]; | |
497 | EXEC SQL SELECT owner_type, owner_id INTO :type, :id | |
498 | FROM printservers WHERE mach_id = :mach_id; | |
499 | if (sqlca.sqlcode) | |
500 | return MR_PERM; | |
501 | ||
502 | status = find_member(type, id, cl); | |
503 | if (status) | |
504 | return MR_SUCCESS; | |
505 | else | |
506 | return MR_PERM; | |
507 | } |