1/*-------------------------------------------------------------------------
2 *
3 * acl.c
4 * Basic access control list data structures manipulation routines.
5 *
6 * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
7 * Portions Copyright (c) 1994, Regents of the University of California
8 *
9 *
10 * IDENTIFICATION
11 * src/backend/utils/adt/acl.c
12 *
13 *-------------------------------------------------------------------------
14 */
15#include "postgres.h"
16
17#include <ctype.h>
18
19#include "access/htup_details.h"
20#include "catalog/catalog.h"
21#include "catalog/namespace.h"
22#include "catalog/pg_authid.h"
23#include "catalog/pg_auth_members.h"
24#include "catalog/pg_type.h"
25#include "catalog/pg_class.h"
26#include "commands/dbcommands.h"
27#include "commands/proclang.h"
28#include "commands/tablespace.h"
29#include "foreign/foreign.h"
30#include "funcapi.h"
31#include "miscadmin.h"
32#include "utils/acl.h"
33#include "utils/builtins.h"
34#include "utils/catcache.h"
35#include "utils/hashutils.h"
36#include "utils/inval.h"
37#include "utils/lsyscache.h"
38#include "utils/memutils.h"
39#include "utils/syscache.h"
40#include "utils/varlena.h"
41
42
43typedef struct
44{
45 const char *name;
46 AclMode value;
47} priv_map;
48
49/*
50 * We frequently need to test whether a given role is a member of some other
51 * role. In most of these tests the "given role" is the same, namely the
52 * active current user. So we can optimize it by keeping a cached list of
53 * all the roles the "given role" is a member of, directly or indirectly.
54 * The cache is flushed whenever we detect a change in pg_auth_members.
55 *
56 * There are actually two caches, one computed under "has_privs" rules
57 * (do not recurse where rolinherit isn't true) and one computed under
58 * "is_member" rules (recurse regardless of rolinherit).
59 *
60 * Possibly this mechanism should be generalized to allow caching membership
61 * info for multiple roles?
62 *
63 * The has_privs cache is:
64 * cached_privs_role is the role OID the cache is for.
65 * cached_privs_roles is an OID list of roles that cached_privs_role
66 * has the privileges of (always including itself).
67 * The cache is valid if cached_privs_role is not InvalidOid.
68 *
69 * The is_member cache is similarly:
70 * cached_member_role is the role OID the cache is for.
71 * cached_membership_roles is an OID list of roles that cached_member_role
72 * is a member of (always including itself).
73 * The cache is valid if cached_member_role is not InvalidOid.
74 */
75static Oid cached_privs_role = InvalidOid;
76static List *cached_privs_roles = NIL;
77static Oid cached_member_role = InvalidOid;
78static List *cached_membership_roles = NIL;
79
80
81static const char *getid(const char *s, char *n);
82static void putid(char *p, const char *s);
83static Acl *allocacl(int n);
84static void check_acl(const Acl *acl);
85static const char *aclparse(const char *s, AclItem *aip);
86static bool aclitem_match(const AclItem *a1, const AclItem *a2);
87static int aclitemComparator(const void *arg1, const void *arg2);
88static void check_circularity(const Acl *old_acl, const AclItem *mod_aip,
89 Oid ownerId);
90static Acl *recursive_revoke(Acl *acl, Oid grantee, AclMode revoke_privs,
91 Oid ownerId, DropBehavior behavior);
92
93static AclMode convert_priv_string(text *priv_type_text);
94static AclMode convert_any_priv_string(text *priv_type_text,
95 const priv_map *privileges);
96
97static Oid convert_table_name(text *tablename);
98static AclMode convert_table_priv_string(text *priv_type_text);
99static AclMode convert_sequence_priv_string(text *priv_type_text);
100static AttrNumber convert_column_name(Oid tableoid, text *column);
101static AclMode convert_column_priv_string(text *priv_type_text);
102static Oid convert_database_name(text *databasename);
103static AclMode convert_database_priv_string(text *priv_type_text);
104static Oid convert_foreign_data_wrapper_name(text *fdwname);
105static AclMode convert_foreign_data_wrapper_priv_string(text *priv_type_text);
106static Oid convert_function_name(text *functionname);
107static AclMode convert_function_priv_string(text *priv_type_text);
108static Oid convert_language_name(text *languagename);
109static AclMode convert_language_priv_string(text *priv_type_text);
110static Oid convert_schema_name(text *schemaname);
111static AclMode convert_schema_priv_string(text *priv_type_text);
112static Oid convert_server_name(text *servername);
113static AclMode convert_server_priv_string(text *priv_type_text);
114static Oid convert_tablespace_name(text *tablespacename);
115static AclMode convert_tablespace_priv_string(text *priv_type_text);
116static Oid convert_type_name(text *typename);
117static AclMode convert_type_priv_string(text *priv_type_text);
118static AclMode convert_role_priv_string(text *priv_type_text);
119static AclResult pg_role_aclcheck(Oid role_oid, Oid roleid, AclMode mode);
120
121static void RoleMembershipCacheCallback(Datum arg, int cacheid, uint32 hashvalue);
122
123
124/*
125 * getid
126 * Consumes the first alphanumeric string (identifier) found in string
127 * 's', ignoring any leading white space. If it finds a double quote
128 * it returns the word inside the quotes.
129 *
130 * RETURNS:
131 * the string position in 's' that points to the next non-space character
132 * in 's', after any quotes. Also:
133 * - loads the identifier into 'n'. (If no identifier is found, 'n'
134 * contains an empty string.) 'n' must be NAMEDATALEN bytes.
135 */
136static const char *
137getid(const char *s, char *n)
138{
139 int len = 0;
140 bool in_quotes = false;
141
142 Assert(s && n);
143
144 while (isspace((unsigned char) *s))
145 s++;
146 /* This code had better match what putid() does, below */
147 for (;
148 *s != '\0' &&
149 (isalnum((unsigned char) *s) ||
150 *s == '_' ||
151 *s == '"' ||
152 in_quotes);
153 s++)
154 {
155 if (*s == '"')
156 {
157 /* safe to look at next char (could be '\0' though) */
158 if (*(s + 1) != '"')
159 {
160 in_quotes = !in_quotes;
161 continue;
162 }
163 /* it's an escaped double quote; skip the escaping char */
164 s++;
165 }
166
167 /* Add the character to the string */
168 if (len >= NAMEDATALEN - 1)
169 ereport(ERROR,
170 (errcode(ERRCODE_NAME_TOO_LONG),
171 errmsg("identifier too long"),
172 errdetail("Identifier must be less than %d characters.",
173 NAMEDATALEN)));
174
175 n[len++] = *s;
176 }
177 n[len] = '\0';
178 while (isspace((unsigned char) *s))
179 s++;
180 return s;
181}
182
183/*
184 * Write a role name at *p, adding double quotes if needed.
185 * There must be at least (2*NAMEDATALEN)+2 bytes available at *p.
186 * This needs to be kept in sync with copyAclUserName in pg_dump/dumputils.c
187 */
188static void
189putid(char *p, const char *s)
190{
191 const char *src;
192 bool safe = true;
193
194 for (src = s; *src; src++)
195 {
196 /* This test had better match what getid() does, above */
197 if (!isalnum((unsigned char) *src) && *src != '_')
198 {
199 safe = false;
200 break;
201 }
202 }
203 if (!safe)
204 *p++ = '"';
205 for (src = s; *src; src++)
206 {
207 /* A double quote character in a username is encoded as "" */
208 if (*src == '"')
209 *p++ = '"';
210 *p++ = *src;
211 }
212 if (!safe)
213 *p++ = '"';
214 *p = '\0';
215}
216
217/*
218 * aclparse
219 * Consumes and parses an ACL specification of the form:
220 * [group|user] [A-Za-z0-9]*=[rwaR]*
221 * from string 's', ignoring any leading white space or white space
222 * between the optional id type keyword (group|user) and the actual
223 * ACL specification.
224 *
225 * The group|user decoration is unnecessary in the roles world,
226 * but we still accept it for backward compatibility.
227 *
228 * This routine is called by the parser as well as aclitemin(), hence
229 * the added generality.
230 *
231 * RETURNS:
232 * the string position in 's' immediately following the ACL
233 * specification. Also:
234 * - loads the structure pointed to by 'aip' with the appropriate
235 * UID/GID, id type identifier and mode type values.
236 */
237static const char *
238aclparse(const char *s, AclItem *aip)
239{
240 AclMode privs,
241 goption,
242 read;
243 char name[NAMEDATALEN];
244 char name2[NAMEDATALEN];
245
246 Assert(s && aip);
247
248#ifdef ACLDEBUG
249 elog(LOG, "aclparse: input = \"%s\"", s);
250#endif
251 s = getid(s, name);
252 if (*s != '=')
253 {
254 /* we just read a keyword, not a name */
255 if (strcmp(name, "group") != 0 && strcmp(name, "user") != 0)
256 ereport(ERROR,
257 (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
258 errmsg("unrecognized key word: \"%s\"", name),
259 errhint("ACL key word must be \"group\" or \"user\".")));
260 s = getid(s, name); /* move s to the name beyond the keyword */
261 if (name[0] == '\0')
262 ereport(ERROR,
263 (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
264 errmsg("missing name"),
265 errhint("A name must follow the \"group\" or \"user\" key word.")));
266 }
267
268 if (*s != '=')
269 ereport(ERROR,
270 (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
271 errmsg("missing \"=\" sign")));
272
273 privs = goption = ACL_NO_RIGHTS;
274
275 for (++s, read = 0; isalpha((unsigned char) *s) || *s == '*'; s++)
276 {
277 switch (*s)
278 {
279 case '*':
280 goption |= read;
281 break;
282 case ACL_INSERT_CHR:
283 read = ACL_INSERT;
284 break;
285 case ACL_SELECT_CHR:
286 read = ACL_SELECT;
287 break;
288 case ACL_UPDATE_CHR:
289 read = ACL_UPDATE;
290 break;
291 case ACL_DELETE_CHR:
292 read = ACL_DELETE;
293 break;
294 case ACL_TRUNCATE_CHR:
295 read = ACL_TRUNCATE;
296 break;
297 case ACL_REFERENCES_CHR:
298 read = ACL_REFERENCES;
299 break;
300 case ACL_TRIGGER_CHR:
301 read = ACL_TRIGGER;
302 break;
303 case ACL_EXECUTE_CHR:
304 read = ACL_EXECUTE;
305 break;
306 case ACL_USAGE_CHR:
307 read = ACL_USAGE;
308 break;
309 case ACL_CREATE_CHR:
310 read = ACL_CREATE;
311 break;
312 case ACL_CREATE_TEMP_CHR:
313 read = ACL_CREATE_TEMP;
314 break;
315 case ACL_CONNECT_CHR:
316 read = ACL_CONNECT;
317 break;
318 case 'R': /* ignore old RULE privileges */
319 read = 0;
320 break;
321 default:
322 ereport(ERROR,
323 (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
324 errmsg("invalid mode character: must be one of \"%s\"",
325 ACL_ALL_RIGHTS_STR)));
326 }
327
328 privs |= read;
329 }
330
331 if (name[0] == '\0')
332 aip->ai_grantee = ACL_ID_PUBLIC;
333 else
334 aip->ai_grantee = get_role_oid(name, false);
335
336 /*
337 * XXX Allow a degree of backward compatibility by defaulting the grantor
338 * to the superuser.
339 */
340 if (*s == '/')
341 {
342 s = getid(s + 1, name2);
343 if (name2[0] == '\0')
344 ereport(ERROR,
345 (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
346 errmsg("a name must follow the \"/\" sign")));
347 aip->ai_grantor = get_role_oid(name2, false);
348 }
349 else
350 {
351 aip->ai_grantor = BOOTSTRAP_SUPERUSERID;
352 ereport(WARNING,
353 (errcode(ERRCODE_INVALID_GRANTOR),
354 errmsg("defaulting grantor to user ID %u",
355 BOOTSTRAP_SUPERUSERID)));
356 }
357
358 ACLITEM_SET_PRIVS_GOPTIONS(*aip, privs, goption);
359
360#ifdef ACLDEBUG
361 elog(LOG, "aclparse: correctly read [%u %x %x]",
362 aip->ai_grantee, privs, goption);
363#endif
364
365 return s;
366}
367
368/*
369 * allocacl
370 * Allocates storage for a new Acl with 'n' entries.
371 *
372 * RETURNS:
373 * the new Acl
374 */
375static Acl *
376allocacl(int n)
377{
378 Acl *new_acl;
379 Size size;
380
381 if (n < 0)
382 elog(ERROR, "invalid size: %d", n);
383 size = ACL_N_SIZE(n);
384 new_acl = (Acl *) palloc0(size);
385 SET_VARSIZE(new_acl, size);
386 new_acl->ndim = 1;
387 new_acl->dataoffset = 0; /* we never put in any nulls */
388 new_acl->elemtype = ACLITEMOID;
389 ARR_LBOUND(new_acl)[0] = 1;
390 ARR_DIMS(new_acl)[0] = n;
391 return new_acl;
392}
393
394/*
395 * Create a zero-entry ACL
396 */
397Acl *
398make_empty_acl(void)
399{
400 return allocacl(0);
401}
402
403/*
404 * Copy an ACL
405 */
406Acl *
407aclcopy(const Acl *orig_acl)
408{
409 Acl *result_acl;
410
411 result_acl = allocacl(ACL_NUM(orig_acl));
412
413 memcpy(ACL_DAT(result_acl),
414 ACL_DAT(orig_acl),
415 ACL_NUM(orig_acl) * sizeof(AclItem));
416
417 return result_acl;
418}
419
420/*
421 * Concatenate two ACLs
422 *
423 * This is a bit cheesy, since we may produce an ACL with redundant entries.
424 * Be careful what the result is used for!
425 */
426Acl *
427aclconcat(const Acl *left_acl, const Acl *right_acl)
428{
429 Acl *result_acl;
430
431 result_acl = allocacl(ACL_NUM(left_acl) + ACL_NUM(right_acl));
432
433 memcpy(ACL_DAT(result_acl),
434 ACL_DAT(left_acl),
435 ACL_NUM(left_acl) * sizeof(AclItem));
436
437 memcpy(ACL_DAT(result_acl) + ACL_NUM(left_acl),
438 ACL_DAT(right_acl),
439 ACL_NUM(right_acl) * sizeof(AclItem));
440
441 return result_acl;
442}
443
444/*
445 * Merge two ACLs
446 *
447 * This produces a properly merged ACL with no redundant entries.
448 * Returns NULL on NULL input.
449 */
450Acl *
451aclmerge(const Acl *left_acl, const Acl *right_acl, Oid ownerId)
452{
453 Acl *result_acl;
454 AclItem *aip;
455 int i,
456 num;
457
458 /* Check for cases where one or both are empty/null */
459 if (left_acl == NULL || ACL_NUM(left_acl) == 0)
460 {
461 if (right_acl == NULL || ACL_NUM(right_acl) == 0)
462 return NULL;
463 else
464 return aclcopy(right_acl);
465 }
466 else
467 {
468 if (right_acl == NULL || ACL_NUM(right_acl) == 0)
469 return aclcopy(left_acl);
470 }
471
472 /* Merge them the hard way, one item at a time */
473 result_acl = aclcopy(left_acl);
474
475 aip = ACL_DAT(right_acl);
476 num = ACL_NUM(right_acl);
477
478 for (i = 0; i < num; i++, aip++)
479 {
480 Acl *tmp_acl;
481
482 tmp_acl = aclupdate(result_acl, aip, ACL_MODECHG_ADD,
483 ownerId, DROP_RESTRICT);
484 pfree(result_acl);
485 result_acl = tmp_acl;
486 }
487
488 return result_acl;
489}
490
491/*
492 * Sort the items in an ACL (into an arbitrary but consistent order)
493 */
494void
495aclitemsort(Acl *acl)
496{
497 if (acl != NULL && ACL_NUM(acl) > 1)
498 qsort(ACL_DAT(acl), ACL_NUM(acl), sizeof(AclItem), aclitemComparator);
499}
500
501/*
502 * Check if two ACLs are exactly equal
503 *
504 * This will not detect equality if the two arrays contain the same items
505 * in different orders. To handle that case, sort both inputs first,
506 * using aclitemsort().
507 */
508bool
509aclequal(const Acl *left_acl, const Acl *right_acl)
510{
511 /* Check for cases where one or both are empty/null */
512 if (left_acl == NULL || ACL_NUM(left_acl) == 0)
513 {
514 if (right_acl == NULL || ACL_NUM(right_acl) == 0)
515 return true;
516 else
517 return false;
518 }
519 else
520 {
521 if (right_acl == NULL || ACL_NUM(right_acl) == 0)
522 return false;
523 }
524
525 if (ACL_NUM(left_acl) != ACL_NUM(right_acl))
526 return false;
527
528 if (memcmp(ACL_DAT(left_acl),
529 ACL_DAT(right_acl),
530 ACL_NUM(left_acl) * sizeof(AclItem)) == 0)
531 return true;
532
533 return false;
534}
535
536/*
537 * Verify that an ACL array is acceptable (one-dimensional and has no nulls)
538 */
539static void
540check_acl(const Acl *acl)
541{
542 if (ARR_ELEMTYPE(acl) != ACLITEMOID)
543 ereport(ERROR,
544 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
545 errmsg("ACL array contains wrong data type")));
546 if (ARR_NDIM(acl) != 1)
547 ereport(ERROR,
548 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
549 errmsg("ACL arrays must be one-dimensional")));
550 if (ARR_HASNULL(acl))
551 ereport(ERROR,
552 (errcode(ERRCODE_NULL_VALUE_NOT_ALLOWED),
553 errmsg("ACL arrays must not contain null values")));
554}
555
556/*
557 * aclitemin
558 * Allocates storage for, and fills in, a new AclItem given a string
559 * 's' that contains an ACL specification. See aclparse for details.
560 *
561 * RETURNS:
562 * the new AclItem
563 */
564Datum
565aclitemin(PG_FUNCTION_ARGS)
566{
567 const char *s = PG_GETARG_CSTRING(0);
568 AclItem *aip;
569
570 aip = (AclItem *) palloc(sizeof(AclItem));
571 s = aclparse(s, aip);
572 while (isspace((unsigned char) *s))
573 ++s;
574 if (*s)
575 ereport(ERROR,
576 (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
577 errmsg("extra garbage at the end of the ACL specification")));
578
579 PG_RETURN_ACLITEM_P(aip);
580}
581
582/*
583 * aclitemout
584 * Allocates storage for, and fills in, a new null-delimited string
585 * containing a formatted ACL specification. See aclparse for details.
586 *
587 * RETURNS:
588 * the new string
589 */
590Datum
591aclitemout(PG_FUNCTION_ARGS)
592{
593 AclItem *aip = PG_GETARG_ACLITEM_P(0);
594 char *p;
595 char *out;
596 HeapTuple htup;
597 unsigned i;
598
599 out = palloc(strlen("=/") +
600 2 * N_ACL_RIGHTS +
601 2 * (2 * NAMEDATALEN + 2) +
602 1);
603
604 p = out;
605 *p = '\0';
606
607 if (aip->ai_grantee != ACL_ID_PUBLIC)
608 {
609 htup = SearchSysCache1(AUTHOID, ObjectIdGetDatum(aip->ai_grantee));
610 if (HeapTupleIsValid(htup))
611 {
612 putid(p, NameStr(((Form_pg_authid) GETSTRUCT(htup))->rolname));
613 ReleaseSysCache(htup);
614 }
615 else
616 {
617 /* Generate numeric OID if we don't find an entry */
618 sprintf(p, "%u", aip->ai_grantee);
619 }
620 }
621 while (*p)
622 ++p;
623
624 *p++ = '=';
625
626 for (i = 0; i < N_ACL_RIGHTS; ++i)
627 {
628 if (ACLITEM_GET_PRIVS(*aip) & (1 << i))
629 *p++ = ACL_ALL_RIGHTS_STR[i];
630 if (ACLITEM_GET_GOPTIONS(*aip) & (1 << i))
631 *p++ = '*';
632 }
633
634 *p++ = '/';
635 *p = '\0';
636
637 htup = SearchSysCache1(AUTHOID, ObjectIdGetDatum(aip->ai_grantor));
638 if (HeapTupleIsValid(htup))
639 {
640 putid(p, NameStr(((Form_pg_authid) GETSTRUCT(htup))->rolname));
641 ReleaseSysCache(htup);
642 }
643 else
644 {
645 /* Generate numeric OID if we don't find an entry */
646 sprintf(p, "%u", aip->ai_grantor);
647 }
648
649 PG_RETURN_CSTRING(out);
650}
651
652/*
653 * aclitem_match
654 * Two AclItems are considered to match iff they have the same
655 * grantee and grantor; the privileges are ignored.
656 */
657static bool
658aclitem_match(const AclItem *a1, const AclItem *a2)
659{
660 return a1->ai_grantee == a2->ai_grantee &&
661 a1->ai_grantor == a2->ai_grantor;
662}
663
664/*
665 * aclitemComparator
666 * qsort comparison function for AclItems
667 */
668static int
669aclitemComparator(const void *arg1, const void *arg2)
670{
671 const AclItem *a1 = (const AclItem *) arg1;
672 const AclItem *a2 = (const AclItem *) arg2;
673
674 if (a1->ai_grantee > a2->ai_grantee)
675 return 1;
676 if (a1->ai_grantee < a2->ai_grantee)
677 return -1;
678 if (a1->ai_grantor > a2->ai_grantor)
679 return 1;
680 if (a1->ai_grantor < a2->ai_grantor)
681 return -1;
682 if (a1->ai_privs > a2->ai_privs)
683 return 1;
684 if (a1->ai_privs < a2->ai_privs)
685 return -1;
686 return 0;
687}
688
689/*
690 * aclitem equality operator
691 */
692Datum
693aclitem_eq(PG_FUNCTION_ARGS)
694{
695 AclItem *a1 = PG_GETARG_ACLITEM_P(0);
696 AclItem *a2 = PG_GETARG_ACLITEM_P(1);
697 bool result;
698
699 result = a1->ai_privs == a2->ai_privs &&
700 a1->ai_grantee == a2->ai_grantee &&
701 a1->ai_grantor == a2->ai_grantor;
702 PG_RETURN_BOOL(result);
703}
704
705/*
706 * aclitem hash function
707 *
708 * We make aclitems hashable not so much because anyone is likely to hash
709 * them, as because we want array equality to work on aclitem arrays, and
710 * with the typcache mechanism we must have a hash or btree opclass.
711 */
712Datum
713hash_aclitem(PG_FUNCTION_ARGS)
714{
715 AclItem *a = PG_GETARG_ACLITEM_P(0);
716
717 /* not very bright, but avoids any issue of padding in struct */
718 PG_RETURN_UINT32((uint32) (a->ai_privs + a->ai_grantee + a->ai_grantor));
719}
720
721/*
722 * 64-bit hash function for aclitem.
723 *
724 * Similar to hash_aclitem, but accepts a seed and returns a uint64 value.
725 */
726Datum
727hash_aclitem_extended(PG_FUNCTION_ARGS)
728{
729 AclItem *a = PG_GETARG_ACLITEM_P(0);
730 uint64 seed = PG_GETARG_INT64(1);
731 uint32 sum = (uint32) (a->ai_privs + a->ai_grantee + a->ai_grantor);
732
733 return (seed == 0) ? UInt64GetDatum(sum) : hash_uint32_extended(sum, seed);
734}
735
736/*
737 * acldefault() --- create an ACL describing default access permissions
738 *
739 * Change this routine if you want to alter the default access policy for
740 * newly-created objects (or any object with a NULL acl entry). When
741 * you make a change here, don't forget to update the GRANT man page,
742 * which explains all the default permissions.
743 *
744 * Note that these are the hard-wired "defaults" that are used in the
745 * absence of any pg_default_acl entry.
746 */
747Acl *
748acldefault(ObjectType objtype, Oid ownerId)
749{
750 AclMode world_default;
751 AclMode owner_default;
752 int nacl;
753 Acl *acl;
754 AclItem *aip;
755
756 switch (objtype)
757 {
758 case OBJECT_COLUMN:
759 /* by default, columns have no extra privileges */
760 world_default = ACL_NO_RIGHTS;
761 owner_default = ACL_NO_RIGHTS;
762 break;
763 case OBJECT_TABLE:
764 world_default = ACL_NO_RIGHTS;
765 owner_default = ACL_ALL_RIGHTS_RELATION;
766 break;
767 case OBJECT_SEQUENCE:
768 world_default = ACL_NO_RIGHTS;
769 owner_default = ACL_ALL_RIGHTS_SEQUENCE;
770 break;
771 case OBJECT_DATABASE:
772 /* for backwards compatibility, grant some rights by default */
773 world_default = ACL_CREATE_TEMP | ACL_CONNECT;
774 owner_default = ACL_ALL_RIGHTS_DATABASE;
775 break;
776 case OBJECT_FUNCTION:
777 /* Grant EXECUTE by default, for now */
778 world_default = ACL_EXECUTE;
779 owner_default = ACL_ALL_RIGHTS_FUNCTION;
780 break;
781 case OBJECT_LANGUAGE:
782 /* Grant USAGE by default, for now */
783 world_default = ACL_USAGE;
784 owner_default = ACL_ALL_RIGHTS_LANGUAGE;
785 break;
786 case OBJECT_LARGEOBJECT:
787 world_default = ACL_NO_RIGHTS;
788 owner_default = ACL_ALL_RIGHTS_LARGEOBJECT;
789 break;
790 case OBJECT_SCHEMA:
791 world_default = ACL_NO_RIGHTS;
792 owner_default = ACL_ALL_RIGHTS_SCHEMA;
793 break;
794 case OBJECT_TABLESPACE:
795 world_default = ACL_NO_RIGHTS;
796 owner_default = ACL_ALL_RIGHTS_TABLESPACE;
797 break;
798 case OBJECT_FDW:
799 world_default = ACL_NO_RIGHTS;
800 owner_default = ACL_ALL_RIGHTS_FDW;
801 break;
802 case OBJECT_FOREIGN_SERVER:
803 world_default = ACL_NO_RIGHTS;
804 owner_default = ACL_ALL_RIGHTS_FOREIGN_SERVER;
805 break;
806 case OBJECT_DOMAIN:
807 case OBJECT_TYPE:
808 world_default = ACL_USAGE;
809 owner_default = ACL_ALL_RIGHTS_TYPE;
810 break;
811 default:
812 elog(ERROR, "unrecognized objtype: %d", (int) objtype);
813 world_default = ACL_NO_RIGHTS; /* keep compiler quiet */
814 owner_default = ACL_NO_RIGHTS;
815 break;
816 }
817
818 nacl = 0;
819 if (world_default != ACL_NO_RIGHTS)
820 nacl++;
821 if (owner_default != ACL_NO_RIGHTS)
822 nacl++;
823
824 acl = allocacl(nacl);
825 aip = ACL_DAT(acl);
826
827 if (world_default != ACL_NO_RIGHTS)
828 {
829 aip->ai_grantee = ACL_ID_PUBLIC;
830 aip->ai_grantor = ownerId;
831 ACLITEM_SET_PRIVS_GOPTIONS(*aip, world_default, ACL_NO_RIGHTS);
832 aip++;
833 }
834
835 /*
836 * Note that the owner's entry shows all ordinary privileges but no grant
837 * options. This is because his grant options come "from the system" and
838 * not from his own efforts. (The SQL spec says that the owner's rights
839 * come from a "_SYSTEM" authid.) However, we do consider that the
840 * owner's ordinary privileges are self-granted; this lets him revoke
841 * them. We implement the owner's grant options without any explicit
842 * "_SYSTEM"-like ACL entry, by internally special-casing the owner
843 * wherever we are testing grant options.
844 */
845 if (owner_default != ACL_NO_RIGHTS)
846 {
847 aip->ai_grantee = ownerId;
848 aip->ai_grantor = ownerId;
849 ACLITEM_SET_PRIVS_GOPTIONS(*aip, owner_default, ACL_NO_RIGHTS);
850 }
851
852 return acl;
853}
854
855
856/*
857 * SQL-accessible version of acldefault(). Hackish mapping from "char" type to
858 * OBJECT_* values.
859 */
860Datum
861acldefault_sql(PG_FUNCTION_ARGS)
862{
863 char objtypec = PG_GETARG_CHAR(0);
864 Oid owner = PG_GETARG_OID(1);
865 ObjectType objtype = 0;
866
867 switch (objtypec)
868 {
869 case 'c':
870 objtype = OBJECT_COLUMN;
871 break;
872 case 'r':
873 objtype = OBJECT_TABLE;
874 break;
875 case 's':
876 objtype = OBJECT_SEQUENCE;
877 break;
878 case 'd':
879 objtype = OBJECT_DATABASE;
880 break;
881 case 'f':
882 objtype = OBJECT_FUNCTION;
883 break;
884 case 'l':
885 objtype = OBJECT_LANGUAGE;
886 break;
887 case 'L':
888 objtype = OBJECT_LARGEOBJECT;
889 break;
890 case 'n':
891 objtype = OBJECT_SCHEMA;
892 break;
893 case 't':
894 objtype = OBJECT_TABLESPACE;
895 break;
896 case 'F':
897 objtype = OBJECT_FDW;
898 break;
899 case 'S':
900 objtype = OBJECT_FOREIGN_SERVER;
901 break;
902 case 'T':
903 objtype = OBJECT_TYPE;
904 break;
905 default:
906 elog(ERROR, "unrecognized objtype abbreviation: %c", objtypec);
907 }
908
909 PG_RETURN_ACL_P(acldefault(objtype, owner));
910}
911
912
913/*
914 * Update an ACL array to add or remove specified privileges.
915 *
916 * old_acl: the input ACL array
917 * mod_aip: defines the privileges to be added, removed, or substituted
918 * modechg: ACL_MODECHG_ADD, ACL_MODECHG_DEL, or ACL_MODECHG_EQL
919 * ownerId: Oid of object owner
920 * behavior: RESTRICT or CASCADE behavior for recursive removal
921 *
922 * ownerid and behavior are only relevant when the update operation specifies
923 * deletion of grant options.
924 *
925 * The result is a modified copy; the input object is not changed.
926 *
927 * NB: caller is responsible for having detoasted the input ACL, if needed.
928 */
929Acl *
930aclupdate(const Acl *old_acl, const AclItem *mod_aip,
931 int modechg, Oid ownerId, DropBehavior behavior)
932{
933 Acl *new_acl = NULL;
934 AclItem *old_aip,
935 *new_aip = NULL;
936 AclMode old_rights,
937 old_goptions,
938 new_rights,
939 new_goptions;
940 int dst,
941 num;
942
943 /* Caller probably already checked old_acl, but be safe */
944 check_acl(old_acl);
945
946 /* If granting grant options, check for circularity */
947 if (modechg != ACL_MODECHG_DEL &&
948 ACLITEM_GET_GOPTIONS(*mod_aip) != ACL_NO_RIGHTS)
949 check_circularity(old_acl, mod_aip, ownerId);
950
951 num = ACL_NUM(old_acl);
952 old_aip = ACL_DAT(old_acl);
953
954 /*
955 * Search the ACL for an existing entry for this grantee and grantor. If
956 * one exists, just modify the entry in-place (well, in the same position,
957 * since we actually return a copy); otherwise, insert the new entry at
958 * the end.
959 */
960
961 for (dst = 0; dst < num; ++dst)
962 {
963 if (aclitem_match(mod_aip, old_aip + dst))
964 {
965 /* found a match, so modify existing item */
966 new_acl = allocacl(num);
967 new_aip = ACL_DAT(new_acl);
968 memcpy(new_acl, old_acl, ACL_SIZE(old_acl));
969 break;
970 }
971 }
972
973 if (dst == num)
974 {
975 /* need to append a new item */
976 new_acl = allocacl(num + 1);
977 new_aip = ACL_DAT(new_acl);
978 memcpy(new_aip, old_aip, num * sizeof(AclItem));
979
980 /* initialize the new entry with no permissions */
981 new_aip[dst].ai_grantee = mod_aip->ai_grantee;
982 new_aip[dst].ai_grantor = mod_aip->ai_grantor;
983 ACLITEM_SET_PRIVS_GOPTIONS(new_aip[dst],
984 ACL_NO_RIGHTS, ACL_NO_RIGHTS);
985 num++; /* set num to the size of new_acl */
986 }
987
988 old_rights = ACLITEM_GET_RIGHTS(new_aip[dst]);
989 old_goptions = ACLITEM_GET_GOPTIONS(new_aip[dst]);
990
991 /* apply the specified permissions change */
992 switch (modechg)
993 {
994 case ACL_MODECHG_ADD:
995 ACLITEM_SET_RIGHTS(new_aip[dst],
996 old_rights | ACLITEM_GET_RIGHTS(*mod_aip));
997 break;
998 case ACL_MODECHG_DEL:
999 ACLITEM_SET_RIGHTS(new_aip[dst],
1000 old_rights & ~ACLITEM_GET_RIGHTS(*mod_aip));
1001 break;
1002 case ACL_MODECHG_EQL:
1003 ACLITEM_SET_RIGHTS(new_aip[dst],
1004 ACLITEM_GET_RIGHTS(*mod_aip));
1005 break;
1006 }
1007
1008 new_rights = ACLITEM_GET_RIGHTS(new_aip[dst]);
1009 new_goptions = ACLITEM_GET_GOPTIONS(new_aip[dst]);
1010
1011 /*
1012 * If the adjusted entry has no permissions, delete it from the list.
1013 */
1014 if (new_rights == ACL_NO_RIGHTS)
1015 {
1016 memmove(new_aip + dst,
1017 new_aip + dst + 1,
1018 (num - dst - 1) * sizeof(AclItem));
1019 /* Adjust array size to be 'num - 1' items */
1020 ARR_DIMS(new_acl)[0] = num - 1;
1021 SET_VARSIZE(new_acl, ACL_N_SIZE(num - 1));
1022 }
1023
1024 /*
1025 * Remove abandoned privileges (cascading revoke). Currently we can only
1026 * handle this when the grantee is not PUBLIC.
1027 */
1028 if ((old_goptions & ~new_goptions) != 0)
1029 {
1030 Assert(mod_aip->ai_grantee != ACL_ID_PUBLIC);
1031 new_acl = recursive_revoke(new_acl, mod_aip->ai_grantee,
1032 (old_goptions & ~new_goptions),
1033 ownerId, behavior);
1034 }
1035
1036 return new_acl;
1037}
1038
1039/*
1040 * Update an ACL array to reflect a change of owner to the parent object
1041 *
1042 * old_acl: the input ACL array (must not be NULL)
1043 * oldOwnerId: Oid of the old object owner
1044 * newOwnerId: Oid of the new object owner
1045 *
1046 * The result is a modified copy; the input object is not changed.
1047 *
1048 * NB: caller is responsible for having detoasted the input ACL, if needed.
1049 */
1050Acl *
1051aclnewowner(const Acl *old_acl, Oid oldOwnerId, Oid newOwnerId)
1052{
1053 Acl *new_acl;
1054 AclItem *new_aip;
1055 AclItem *old_aip;
1056 AclItem *dst_aip;
1057 AclItem *src_aip;
1058 AclItem *targ_aip;
1059 bool newpresent = false;
1060 int dst,
1061 src,
1062 targ,
1063 num;
1064
1065 check_acl(old_acl);
1066
1067 /*
1068 * Make a copy of the given ACL, substituting new owner ID for old
1069 * wherever it appears as either grantor or grantee. Also note if the new
1070 * owner ID is already present.
1071 */
1072 num = ACL_NUM(old_acl);
1073 old_aip = ACL_DAT(old_acl);
1074 new_acl = allocacl(num);
1075 new_aip = ACL_DAT(new_acl);
1076 memcpy(new_aip, old_aip, num * sizeof(AclItem));
1077 for (dst = 0, dst_aip = new_aip; dst < num; dst++, dst_aip++)
1078 {
1079 if (dst_aip->ai_grantor == oldOwnerId)
1080 dst_aip->ai_grantor = newOwnerId;
1081 else if (dst_aip->ai_grantor == newOwnerId)
1082 newpresent = true;
1083 if (dst_aip->ai_grantee == oldOwnerId)
1084 dst_aip->ai_grantee = newOwnerId;
1085 else if (dst_aip->ai_grantee == newOwnerId)
1086 newpresent = true;
1087 }
1088
1089 /*
1090 * If the old ACL contained any references to the new owner, then we may
1091 * now have generated an ACL containing duplicate entries. Find them and
1092 * merge them so that there are not duplicates. (This is relatively
1093 * expensive since we use a stupid O(N^2) algorithm, but it's unlikely to
1094 * be the normal case.)
1095 *
1096 * To simplify deletion of duplicate entries, we temporarily leave them in
1097 * the array but set their privilege masks to zero; when we reach such an
1098 * entry it's just skipped. (Thus, a side effect of this code will be to
1099 * remove privilege-free entries, should there be any in the input.) dst
1100 * is the next output slot, targ is the currently considered input slot
1101 * (always >= dst), and src scans entries to the right of targ looking for
1102 * duplicates. Once an entry has been emitted to dst it is known
1103 * duplicate-free and need not be considered anymore.
1104 */
1105 if (newpresent)
1106 {
1107 dst = 0;
1108 for (targ = 0, targ_aip = new_aip; targ < num; targ++, targ_aip++)
1109 {
1110 /* ignore if deleted in an earlier pass */
1111 if (ACLITEM_GET_RIGHTS(*targ_aip) == ACL_NO_RIGHTS)
1112 continue;
1113 /* find and merge any duplicates */
1114 for (src = targ + 1, src_aip = targ_aip + 1; src < num;
1115 src++, src_aip++)
1116 {
1117 if (ACLITEM_GET_RIGHTS(*src_aip) == ACL_NO_RIGHTS)
1118 continue;
1119 if (aclitem_match(targ_aip, src_aip))
1120 {
1121 ACLITEM_SET_RIGHTS(*targ_aip,
1122 ACLITEM_GET_RIGHTS(*targ_aip) |
1123 ACLITEM_GET_RIGHTS(*src_aip));
1124 /* mark the duplicate deleted */
1125 ACLITEM_SET_RIGHTS(*src_aip, ACL_NO_RIGHTS);
1126 }
1127 }
1128 /* and emit to output */
1129 new_aip[dst] = *targ_aip;
1130 dst++;
1131 }
1132 /* Adjust array size to be 'dst' items */
1133 ARR_DIMS(new_acl)[0] = dst;
1134 SET_VARSIZE(new_acl, ACL_N_SIZE(dst));
1135 }
1136
1137 return new_acl;
1138}
1139
1140
1141/*
1142 * When granting grant options, we must disallow attempts to set up circular
1143 * chains of grant options. Suppose A (the object owner) grants B some
1144 * privileges with grant option, and B re-grants them to C. If C could
1145 * grant the privileges to B as well, then A would be unable to effectively
1146 * revoke the privileges from B, since recursive_revoke would consider that
1147 * B still has 'em from C.
1148 *
1149 * We check for this by recursively deleting all grant options belonging to
1150 * the target grantee, and then seeing if the would-be grantor still has the
1151 * grant option or not.
1152 */
1153static void
1154check_circularity(const Acl *old_acl, const AclItem *mod_aip,
1155 Oid ownerId)
1156{
1157 Acl *acl;
1158 AclItem *aip;
1159 int i,
1160 num;
1161 AclMode own_privs;
1162
1163 check_acl(old_acl);
1164
1165 /*
1166 * For now, grant options can only be granted to roles, not PUBLIC.
1167 * Otherwise we'd have to work a bit harder here.
1168 */
1169 Assert(mod_aip->ai_grantee != ACL_ID_PUBLIC);
1170
1171 /* The owner always has grant options, no need to check */
1172 if (mod_aip->ai_grantor == ownerId)
1173 return;
1174
1175 /* Make a working copy */
1176 acl = allocacl(ACL_NUM(old_acl));
1177 memcpy(acl, old_acl, ACL_SIZE(old_acl));
1178
1179 /* Zap all grant options of target grantee, plus what depends on 'em */
1180cc_restart:
1181 num = ACL_NUM(acl);
1182 aip = ACL_DAT(acl);
1183 for (i = 0; i < num; i++)
1184 {
1185 if (aip[i].ai_grantee == mod_aip->ai_grantee &&
1186 ACLITEM_GET_GOPTIONS(aip[i]) != ACL_NO_RIGHTS)
1187 {
1188 Acl *new_acl;
1189
1190 /* We'll actually zap ordinary privs too, but no matter */
1191 new_acl = aclupdate(acl, &aip[i], ACL_MODECHG_DEL,
1192 ownerId, DROP_CASCADE);
1193
1194 pfree(acl);
1195 acl = new_acl;
1196
1197 goto cc_restart;
1198 }
1199 }
1200
1201 /* Now we can compute grantor's independently-derived privileges */
1202 own_privs = aclmask(acl,
1203 mod_aip->ai_grantor,
1204 ownerId,
1205 ACL_GRANT_OPTION_FOR(ACLITEM_GET_GOPTIONS(*mod_aip)),
1206 ACLMASK_ALL);
1207 own_privs = ACL_OPTION_TO_PRIVS(own_privs);
1208
1209 if ((ACLITEM_GET_GOPTIONS(*mod_aip) & ~own_privs) != 0)
1210 ereport(ERROR,
1211 (errcode(ERRCODE_INVALID_GRANT_OPERATION),
1212 errmsg("grant options cannot be granted back to your own grantor")));
1213
1214 pfree(acl);
1215}
1216
1217
1218/*
1219 * Ensure that no privilege is "abandoned". A privilege is abandoned
1220 * if the user that granted the privilege loses the grant option. (So
1221 * the chain through which it was granted is broken.) Either the
1222 * abandoned privileges are revoked as well, or an error message is
1223 * printed, depending on the drop behavior option.
1224 *
1225 * acl: the input ACL list
1226 * grantee: the user from whom some grant options have been revoked
1227 * revoke_privs: the grant options being revoked
1228 * ownerId: Oid of object owner
1229 * behavior: RESTRICT or CASCADE behavior for recursive removal
1230 *
1231 * The input Acl object is pfree'd if replaced.
1232 */
1233static Acl *
1234recursive_revoke(Acl *acl,
1235 Oid grantee,
1236 AclMode revoke_privs,
1237 Oid ownerId,
1238 DropBehavior behavior)
1239{
1240 AclMode still_has;
1241 AclItem *aip;
1242 int i,
1243 num;
1244
1245 check_acl(acl);
1246
1247 /* The owner can never truly lose grant options, so short-circuit */
1248 if (grantee == ownerId)
1249 return acl;
1250
1251 /* The grantee might still have some grant options via another grantor */
1252 still_has = aclmask(acl, grantee, ownerId,
1253 ACL_GRANT_OPTION_FOR(revoke_privs),
1254 ACLMASK_ALL);
1255 revoke_privs &= ~ACL_OPTION_TO_PRIVS(still_has);
1256 if (revoke_privs == ACL_NO_RIGHTS)
1257 return acl;
1258
1259restart:
1260 num = ACL_NUM(acl);
1261 aip = ACL_DAT(acl);
1262 for (i = 0; i < num; i++)
1263 {
1264 if (aip[i].ai_grantor == grantee
1265 && (ACLITEM_GET_PRIVS(aip[i]) & revoke_privs) != 0)
1266 {
1267 AclItem mod_acl;
1268 Acl *new_acl;
1269
1270 if (behavior == DROP_RESTRICT)
1271 ereport(ERROR,
1272 (errcode(ERRCODE_DEPENDENT_OBJECTS_STILL_EXIST),
1273 errmsg("dependent privileges exist"),
1274 errhint("Use CASCADE to revoke them too.")));
1275
1276 mod_acl.ai_grantor = grantee;
1277 mod_acl.ai_grantee = aip[i].ai_grantee;
1278 ACLITEM_SET_PRIVS_GOPTIONS(mod_acl,
1279 revoke_privs,
1280 revoke_privs);
1281
1282 new_acl = aclupdate(acl, &mod_acl, ACL_MODECHG_DEL,
1283 ownerId, behavior);
1284
1285 pfree(acl);
1286 acl = new_acl;
1287
1288 goto restart;
1289 }
1290 }
1291
1292 return acl;
1293}
1294
1295
1296/*
1297 * aclmask --- compute bitmask of all privileges held by roleid.
1298 *
1299 * When 'how' = ACLMASK_ALL, this simply returns the privilege bits
1300 * held by the given roleid according to the given ACL list, ANDed
1301 * with 'mask'. (The point of passing 'mask' is to let the routine
1302 * exit early if all privileges of interest have been found.)
1303 *
1304 * When 'how' = ACLMASK_ANY, returns as soon as any bit in the mask
1305 * is known true. (This lets us exit soonest in cases where the
1306 * caller is only going to test for zero or nonzero result.)
1307 *
1308 * Usage patterns:
1309 *
1310 * To see if any of a set of privileges are held:
1311 * if (aclmask(acl, roleid, ownerId, privs, ACLMASK_ANY) != 0)
1312 *
1313 * To see if all of a set of privileges are held:
1314 * if (aclmask(acl, roleid, ownerId, privs, ACLMASK_ALL) == privs)
1315 *
1316 * To determine exactly which of a set of privileges are held:
1317 * heldprivs = aclmask(acl, roleid, ownerId, privs, ACLMASK_ALL);
1318 */
1319AclMode
1320aclmask(const Acl *acl, Oid roleid, Oid ownerId,
1321 AclMode mask, AclMaskHow how)
1322{
1323 AclMode result;
1324 AclMode remaining;
1325 AclItem *aidat;
1326 int i,
1327 num;
1328
1329 /*
1330 * Null ACL should not happen, since caller should have inserted
1331 * appropriate default
1332 */
1333 if (acl == NULL)
1334 elog(ERROR, "null ACL");
1335
1336 check_acl(acl);
1337
1338 /* Quick exit for mask == 0 */
1339 if (mask == 0)
1340 return 0;
1341
1342 result = 0;
1343
1344 /* Owner always implicitly has all grant options */
1345 if ((mask & ACLITEM_ALL_GOPTION_BITS) &&
1346 has_privs_of_role(roleid, ownerId))
1347 {
1348 result = mask & ACLITEM_ALL_GOPTION_BITS;
1349 if ((how == ACLMASK_ALL) ? (result == mask) : (result != 0))
1350 return result;
1351 }
1352
1353 num = ACL_NUM(acl);
1354 aidat = ACL_DAT(acl);
1355
1356 /*
1357 * Check privileges granted directly to roleid or to public
1358 */
1359 for (i = 0; i < num; i++)
1360 {
1361 AclItem *aidata = &aidat[i];
1362
1363 if (aidata->ai_grantee == ACL_ID_PUBLIC ||
1364 aidata->ai_grantee == roleid)
1365 {
1366 result |= aidata->ai_privs & mask;
1367 if ((how == ACLMASK_ALL) ? (result == mask) : (result != 0))
1368 return result;
1369 }
1370 }
1371
1372 /*
1373 * Check privileges granted indirectly via role memberships. We do this in
1374 * a separate pass to minimize expensive indirect membership tests. In
1375 * particular, it's worth testing whether a given ACL entry grants any
1376 * privileges still of interest before we perform the has_privs_of_role
1377 * test.
1378 */
1379 remaining = mask & ~result;
1380 for (i = 0; i < num; i++)
1381 {
1382 AclItem *aidata = &aidat[i];
1383
1384 if (aidata->ai_grantee == ACL_ID_PUBLIC ||
1385 aidata->ai_grantee == roleid)
1386 continue; /* already checked it */
1387
1388 if ((aidata->ai_privs & remaining) &&
1389 has_privs_of_role(roleid, aidata->ai_grantee))
1390 {
1391 result |= aidata->ai_privs & mask;
1392 if ((how == ACLMASK_ALL) ? (result == mask) : (result != 0))
1393 return result;
1394 remaining = mask & ~result;
1395 }
1396 }
1397
1398 return result;
1399}
1400
1401
1402/*
1403 * aclmask_direct --- compute bitmask of all privileges held by roleid.
1404 *
1405 * This is exactly like aclmask() except that we consider only privileges
1406 * held *directly* by roleid, not those inherited via role membership.
1407 */
1408static AclMode
1409aclmask_direct(const Acl *acl, Oid roleid, Oid ownerId,
1410 AclMode mask, AclMaskHow how)
1411{
1412 AclMode result;
1413 AclItem *aidat;
1414 int i,
1415 num;
1416
1417 /*
1418 * Null ACL should not happen, since caller should have inserted
1419 * appropriate default
1420 */
1421 if (acl == NULL)
1422 elog(ERROR, "null ACL");
1423
1424 check_acl(acl);
1425
1426 /* Quick exit for mask == 0 */
1427 if (mask == 0)
1428 return 0;
1429
1430 result = 0;
1431
1432 /* Owner always implicitly has all grant options */
1433 if ((mask & ACLITEM_ALL_GOPTION_BITS) &&
1434 roleid == ownerId)
1435 {
1436 result = mask & ACLITEM_ALL_GOPTION_BITS;
1437 if ((how == ACLMASK_ALL) ? (result == mask) : (result != 0))
1438 return result;
1439 }
1440
1441 num = ACL_NUM(acl);
1442 aidat = ACL_DAT(acl);
1443
1444 /*
1445 * Check privileges granted directly to roleid (and not to public)
1446 */
1447 for (i = 0; i < num; i++)
1448 {
1449 AclItem *aidata = &aidat[i];
1450
1451 if (aidata->ai_grantee == roleid)
1452 {
1453 result |= aidata->ai_privs & mask;
1454 if ((how == ACLMASK_ALL) ? (result == mask) : (result != 0))
1455 return result;
1456 }
1457 }
1458
1459 return result;
1460}
1461
1462
1463/*
1464 * aclmembers
1465 * Find out all the roleids mentioned in an Acl.
1466 * Note that we do not distinguish grantors from grantees.
1467 *
1468 * *roleids is set to point to a palloc'd array containing distinct OIDs
1469 * in sorted order. The length of the array is the function result.
1470 */
1471int
1472aclmembers(const Acl *acl, Oid **roleids)
1473{
1474 Oid *list;
1475 const AclItem *acldat;
1476 int i,
1477 j,
1478 k;
1479
1480 if (acl == NULL || ACL_NUM(acl) == 0)
1481 {
1482 *roleids = NULL;
1483 return 0;
1484 }
1485
1486 check_acl(acl);
1487
1488 /* Allocate the worst-case space requirement */
1489 list = palloc(ACL_NUM(acl) * 2 * sizeof(Oid));
1490 acldat = ACL_DAT(acl);
1491
1492 /*
1493 * Walk the ACL collecting mentioned RoleIds.
1494 */
1495 j = 0;
1496 for (i = 0; i < ACL_NUM(acl); i++)
1497 {
1498 const AclItem *ai = &acldat[i];
1499
1500 if (ai->ai_grantee != ACL_ID_PUBLIC)
1501 list[j++] = ai->ai_grantee;
1502 /* grantor is currently never PUBLIC, but let's check anyway */
1503 if (ai->ai_grantor != ACL_ID_PUBLIC)
1504 list[j++] = ai->ai_grantor;
1505 }
1506
1507 /* Sort the array */
1508 qsort(list, j, sizeof(Oid), oid_cmp);
1509
1510 /* Remove duplicates from the array */
1511 k = 0;
1512 for (i = 1; i < j; i++)
1513 {
1514 if (list[k] != list[i])
1515 list[++k] = list[i];
1516 }
1517
1518 /*
1519 * We could repalloc the array down to minimum size, but it's hardly worth
1520 * it since it's only transient memory.
1521 */
1522 *roleids = list;
1523
1524 return k + 1;
1525}
1526
1527
1528/*
1529 * aclinsert (exported function)
1530 */
1531Datum
1532aclinsert(PG_FUNCTION_ARGS)
1533{
1534 ereport(ERROR,
1535 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1536 errmsg("aclinsert is no longer supported")));
1537
1538 PG_RETURN_NULL(); /* keep compiler quiet */
1539}
1540
1541Datum
1542aclremove(PG_FUNCTION_ARGS)
1543{
1544 ereport(ERROR,
1545 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1546 errmsg("aclremove is no longer supported")));
1547
1548 PG_RETURN_NULL(); /* keep compiler quiet */
1549}
1550
1551Datum
1552aclcontains(PG_FUNCTION_ARGS)
1553{
1554 Acl *acl = PG_GETARG_ACL_P(0);
1555 AclItem *aip = PG_GETARG_ACLITEM_P(1);
1556 AclItem *aidat;
1557 int i,
1558 num;
1559
1560 check_acl(acl);
1561 num = ACL_NUM(acl);
1562 aidat = ACL_DAT(acl);
1563 for (i = 0; i < num; ++i)
1564 {
1565 if (aip->ai_grantee == aidat[i].ai_grantee &&
1566 aip->ai_grantor == aidat[i].ai_grantor &&
1567 (ACLITEM_GET_RIGHTS(*aip) & ACLITEM_GET_RIGHTS(aidat[i])) == ACLITEM_GET_RIGHTS(*aip))
1568 PG_RETURN_BOOL(true);
1569 }
1570 PG_RETURN_BOOL(false);
1571}
1572
1573Datum
1574makeaclitem(PG_FUNCTION_ARGS)
1575{
1576 Oid grantee = PG_GETARG_OID(0);
1577 Oid grantor = PG_GETARG_OID(1);
1578 text *privtext = PG_GETARG_TEXT_PP(2);
1579 bool goption = PG_GETARG_BOOL(3);
1580 AclItem *result;
1581 AclMode priv;
1582
1583 priv = convert_priv_string(privtext);
1584
1585 result = (AclItem *) palloc(sizeof(AclItem));
1586
1587 result->ai_grantee = grantee;
1588 result->ai_grantor = grantor;
1589
1590 ACLITEM_SET_PRIVS_GOPTIONS(*result, priv,
1591 (goption ? priv : ACL_NO_RIGHTS));
1592
1593 PG_RETURN_ACLITEM_P(result);
1594}
1595
1596static AclMode
1597convert_priv_string(text *priv_type_text)
1598{
1599 char *priv_type = text_to_cstring(priv_type_text);
1600
1601 if (pg_strcasecmp(priv_type, "SELECT") == 0)
1602 return ACL_SELECT;
1603 if (pg_strcasecmp(priv_type, "INSERT") == 0)
1604 return ACL_INSERT;
1605 if (pg_strcasecmp(priv_type, "UPDATE") == 0)
1606 return ACL_UPDATE;
1607 if (pg_strcasecmp(priv_type, "DELETE") == 0)
1608 return ACL_DELETE;
1609 if (pg_strcasecmp(priv_type, "TRUNCATE") == 0)
1610 return ACL_TRUNCATE;
1611 if (pg_strcasecmp(priv_type, "REFERENCES") == 0)
1612 return ACL_REFERENCES;
1613 if (pg_strcasecmp(priv_type, "TRIGGER") == 0)
1614 return ACL_TRIGGER;
1615 if (pg_strcasecmp(priv_type, "EXECUTE") == 0)
1616 return ACL_EXECUTE;
1617 if (pg_strcasecmp(priv_type, "USAGE") == 0)
1618 return ACL_USAGE;
1619 if (pg_strcasecmp(priv_type, "CREATE") == 0)
1620 return ACL_CREATE;
1621 if (pg_strcasecmp(priv_type, "TEMP") == 0)
1622 return ACL_CREATE_TEMP;
1623 if (pg_strcasecmp(priv_type, "TEMPORARY") == 0)
1624 return ACL_CREATE_TEMP;
1625 if (pg_strcasecmp(priv_type, "CONNECT") == 0)
1626 return ACL_CONNECT;
1627 if (pg_strcasecmp(priv_type, "RULE") == 0)
1628 return 0; /* ignore old RULE privileges */
1629
1630 ereport(ERROR,
1631 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1632 errmsg("unrecognized privilege type: \"%s\"", priv_type)));
1633 return ACL_NO_RIGHTS; /* keep compiler quiet */
1634}
1635
1636
1637/*
1638 * convert_any_priv_string: recognize privilege strings for has_foo_privilege
1639 *
1640 * We accept a comma-separated list of case-insensitive privilege names,
1641 * producing a bitmask of the OR'd privilege bits. We are liberal about
1642 * whitespace between items, not so much about whitespace within items.
1643 * The allowed privilege names are given as an array of priv_map structs,
1644 * terminated by one with a NULL name pointer.
1645 */
1646static AclMode
1647convert_any_priv_string(text *priv_type_text,
1648 const priv_map *privileges)
1649{
1650 AclMode result = 0;
1651 char *priv_type = text_to_cstring(priv_type_text);
1652 char *chunk;
1653 char *next_chunk;
1654
1655 /* We rely on priv_type being a private, modifiable string */
1656 for (chunk = priv_type; chunk; chunk = next_chunk)
1657 {
1658 int chunk_len;
1659 const priv_map *this_priv;
1660
1661 /* Split string at commas */
1662 next_chunk = strchr(chunk, ',');
1663 if (next_chunk)
1664 *next_chunk++ = '\0';
1665
1666 /* Drop leading/trailing whitespace in this chunk */
1667 while (*chunk && isspace((unsigned char) *chunk))
1668 chunk++;
1669 chunk_len = strlen(chunk);
1670 while (chunk_len > 0 && isspace((unsigned char) chunk[chunk_len - 1]))
1671 chunk_len--;
1672 chunk[chunk_len] = '\0';
1673
1674 /* Match to the privileges list */
1675 for (this_priv = privileges; this_priv->name; this_priv++)
1676 {
1677 if (pg_strcasecmp(this_priv->name, chunk) == 0)
1678 {
1679 result |= this_priv->value;
1680 break;
1681 }
1682 }
1683 if (!this_priv->name)
1684 ereport(ERROR,
1685 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1686 errmsg("unrecognized privilege type: \"%s\"", chunk)));
1687 }
1688
1689 pfree(priv_type);
1690 return result;
1691}
1692
1693
1694static const char *
1695convert_aclright_to_string(int aclright)
1696{
1697 switch (aclright)
1698 {
1699 case ACL_INSERT:
1700 return "INSERT";
1701 case ACL_SELECT:
1702 return "SELECT";
1703 case ACL_UPDATE:
1704 return "UPDATE";
1705 case ACL_DELETE:
1706 return "DELETE";
1707 case ACL_TRUNCATE:
1708 return "TRUNCATE";
1709 case ACL_REFERENCES:
1710 return "REFERENCES";
1711 case ACL_TRIGGER:
1712 return "TRIGGER";
1713 case ACL_EXECUTE:
1714 return "EXECUTE";
1715 case ACL_USAGE:
1716 return "USAGE";
1717 case ACL_CREATE:
1718 return "CREATE";
1719 case ACL_CREATE_TEMP:
1720 return "TEMPORARY";
1721 case ACL_CONNECT:
1722 return "CONNECT";
1723 default:
1724 elog(ERROR, "unrecognized aclright: %d", aclright);
1725 return NULL;
1726 }
1727}
1728
1729
1730/*----------
1731 * Convert an aclitem[] to a table.
1732 *
1733 * Example:
1734 *
1735 * aclexplode('{=r/joe,foo=a*w/joe}'::aclitem[])
1736 *
1737 * returns the table
1738 *
1739 * {{ OID(joe), 0::OID, 'SELECT', false },
1740 * { OID(joe), OID(foo), 'INSERT', true },
1741 * { OID(joe), OID(foo), 'UPDATE', false }}
1742 *----------
1743 */
1744Datum
1745aclexplode(PG_FUNCTION_ARGS)
1746{
1747 Acl *acl = PG_GETARG_ACL_P(0);
1748 FuncCallContext *funcctx;
1749 int *idx;
1750 AclItem *aidat;
1751
1752 if (SRF_IS_FIRSTCALL())
1753 {
1754 TupleDesc tupdesc;
1755 MemoryContext oldcontext;
1756
1757 check_acl(acl);
1758
1759 funcctx = SRF_FIRSTCALL_INIT();
1760 oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
1761
1762 /*
1763 * build tupdesc for result tuples (matches out parameters in pg_proc
1764 * entry)
1765 */
1766 tupdesc = CreateTemplateTupleDesc(4);
1767 TupleDescInitEntry(tupdesc, (AttrNumber) 1, "grantor",
1768 OIDOID, -1, 0);
1769 TupleDescInitEntry(tupdesc, (AttrNumber) 2, "grantee",
1770 OIDOID, -1, 0);
1771 TupleDescInitEntry(tupdesc, (AttrNumber) 3, "privilege_type",
1772 TEXTOID, -1, 0);
1773 TupleDescInitEntry(tupdesc, (AttrNumber) 4, "is_grantable",
1774 BOOLOID, -1, 0);
1775
1776 funcctx->tuple_desc = BlessTupleDesc(tupdesc);
1777
1778 /* allocate memory for user context */
1779 idx = (int *) palloc(sizeof(int[2]));
1780 idx[0] = 0; /* ACL array item index */
1781 idx[1] = -1; /* privilege type counter */
1782 funcctx->user_fctx = (void *) idx;
1783
1784 MemoryContextSwitchTo(oldcontext);
1785 }
1786
1787 funcctx = SRF_PERCALL_SETUP();
1788 idx = (int *) funcctx->user_fctx;
1789 aidat = ACL_DAT(acl);
1790
1791 /* need test here in case acl has no items */
1792 while (idx[0] < ACL_NUM(acl))
1793 {
1794 AclItem *aidata;
1795 AclMode priv_bit;
1796
1797 idx[1]++;
1798 if (idx[1] == N_ACL_RIGHTS)
1799 {
1800 idx[1] = 0;
1801 idx[0]++;
1802 if (idx[0] >= ACL_NUM(acl)) /* done */
1803 break;
1804 }
1805 aidata = &aidat[idx[0]];
1806 priv_bit = 1 << idx[1];
1807
1808 if (ACLITEM_GET_PRIVS(*aidata) & priv_bit)
1809 {
1810 Datum result;
1811 Datum values[4];
1812 bool nulls[4];
1813 HeapTuple tuple;
1814
1815 values[0] = ObjectIdGetDatum(aidata->ai_grantor);
1816 values[1] = ObjectIdGetDatum(aidata->ai_grantee);
1817 values[2] = CStringGetTextDatum(convert_aclright_to_string(priv_bit));
1818 values[3] = BoolGetDatum((ACLITEM_GET_GOPTIONS(*aidata) & priv_bit) != 0);
1819
1820 MemSet(nulls, 0, sizeof(nulls));
1821
1822 tuple = heap_form_tuple(funcctx->tuple_desc, values, nulls);
1823 result = HeapTupleGetDatum(tuple);
1824
1825 SRF_RETURN_NEXT(funcctx, result);
1826 }
1827 }
1828
1829 SRF_RETURN_DONE(funcctx);
1830}
1831
1832
1833/*
1834 * has_table_privilege variants
1835 * These are all named "has_table_privilege" at the SQL level.
1836 * They take various combinations of relation name, relation OID,
1837 * user name, user OID, or implicit user = current_user.
1838 *
1839 * The result is a boolean value: true if user has the indicated
1840 * privilege, false if not. The variants that take a relation OID
1841 * return NULL if the OID doesn't exist (rather than failing, as
1842 * they did before Postgres 8.4).
1843 */
1844
1845/*
1846 * has_table_privilege_name_name
1847 * Check user privileges on a table given
1848 * name username, text tablename, and text priv name.
1849 */
1850Datum
1851has_table_privilege_name_name(PG_FUNCTION_ARGS)
1852{
1853 Name rolename = PG_GETARG_NAME(0);
1854 text *tablename = PG_GETARG_TEXT_PP(1);
1855 text *priv_type_text = PG_GETARG_TEXT_PP(2);
1856 Oid roleid;
1857 Oid tableoid;
1858 AclMode mode;
1859 AclResult aclresult;
1860
1861 roleid = get_role_oid_or_public(NameStr(*rolename));
1862 tableoid = convert_table_name(tablename);
1863 mode = convert_table_priv_string(priv_type_text);
1864
1865 aclresult = pg_class_aclcheck(tableoid, roleid, mode);
1866
1867 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
1868}
1869
1870/*
1871 * has_table_privilege_name
1872 * Check user privileges on a table given
1873 * text tablename and text priv name.
1874 * current_user is assumed
1875 */
1876Datum
1877has_table_privilege_name(PG_FUNCTION_ARGS)
1878{
1879 text *tablename = PG_GETARG_TEXT_PP(0);
1880 text *priv_type_text = PG_GETARG_TEXT_PP(1);
1881 Oid roleid;
1882 Oid tableoid;
1883 AclMode mode;
1884 AclResult aclresult;
1885
1886 roleid = GetUserId();
1887 tableoid = convert_table_name(tablename);
1888 mode = convert_table_priv_string(priv_type_text);
1889
1890 aclresult = pg_class_aclcheck(tableoid, roleid, mode);
1891
1892 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
1893}
1894
1895/*
1896 * has_table_privilege_name_id
1897 * Check user privileges on a table given
1898 * name usename, table oid, and text priv name.
1899 */
1900Datum
1901has_table_privilege_name_id(PG_FUNCTION_ARGS)
1902{
1903 Name username = PG_GETARG_NAME(0);
1904 Oid tableoid = PG_GETARG_OID(1);
1905 text *priv_type_text = PG_GETARG_TEXT_PP(2);
1906 Oid roleid;
1907 AclMode mode;
1908 AclResult aclresult;
1909
1910 roleid = get_role_oid_or_public(NameStr(*username));
1911 mode = convert_table_priv_string(priv_type_text);
1912
1913 if (!SearchSysCacheExists1(RELOID, ObjectIdGetDatum(tableoid)))
1914 PG_RETURN_NULL();
1915
1916 aclresult = pg_class_aclcheck(tableoid, roleid, mode);
1917
1918 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
1919}
1920
1921/*
1922 * has_table_privilege_id
1923 * Check user privileges on a table given
1924 * table oid, and text priv name.
1925 * current_user is assumed
1926 */
1927Datum
1928has_table_privilege_id(PG_FUNCTION_ARGS)
1929{
1930 Oid tableoid = PG_GETARG_OID(0);
1931 text *priv_type_text = PG_GETARG_TEXT_PP(1);
1932 Oid roleid;
1933 AclMode mode;
1934 AclResult aclresult;
1935
1936 roleid = GetUserId();
1937 mode = convert_table_priv_string(priv_type_text);
1938
1939 if (!SearchSysCacheExists1(RELOID, ObjectIdGetDatum(tableoid)))
1940 PG_RETURN_NULL();
1941
1942 aclresult = pg_class_aclcheck(tableoid, roleid, mode);
1943
1944 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
1945}
1946
1947/*
1948 * has_table_privilege_id_name
1949 * Check user privileges on a table given
1950 * roleid, text tablename, and text priv name.
1951 */
1952Datum
1953has_table_privilege_id_name(PG_FUNCTION_ARGS)
1954{
1955 Oid roleid = PG_GETARG_OID(0);
1956 text *tablename = PG_GETARG_TEXT_PP(1);
1957 text *priv_type_text = PG_GETARG_TEXT_PP(2);
1958 Oid tableoid;
1959 AclMode mode;
1960 AclResult aclresult;
1961
1962 tableoid = convert_table_name(tablename);
1963 mode = convert_table_priv_string(priv_type_text);
1964
1965 aclresult = pg_class_aclcheck(tableoid, roleid, mode);
1966
1967 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
1968}
1969
1970/*
1971 * has_table_privilege_id_id
1972 * Check user privileges on a table given
1973 * roleid, table oid, and text priv name.
1974 */
1975Datum
1976has_table_privilege_id_id(PG_FUNCTION_ARGS)
1977{
1978 Oid roleid = PG_GETARG_OID(0);
1979 Oid tableoid = PG_GETARG_OID(1);
1980 text *priv_type_text = PG_GETARG_TEXT_PP(2);
1981 AclMode mode;
1982 AclResult aclresult;
1983
1984 mode = convert_table_priv_string(priv_type_text);
1985
1986 if (!SearchSysCacheExists1(RELOID, ObjectIdGetDatum(tableoid)))
1987 PG_RETURN_NULL();
1988
1989 aclresult = pg_class_aclcheck(tableoid, roleid, mode);
1990
1991 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
1992}
1993
1994/*
1995 * Support routines for has_table_privilege family.
1996 */
1997
1998/*
1999 * Given a table name expressed as a string, look it up and return Oid
2000 */
2001static Oid
2002convert_table_name(text *tablename)
2003{
2004 RangeVar *relrv;
2005
2006 relrv = makeRangeVarFromNameList(textToQualifiedNameList(tablename));
2007
2008 /* We might not even have permissions on this relation; don't lock it. */
2009 return RangeVarGetRelid(relrv, NoLock, false);
2010}
2011
2012/*
2013 * convert_table_priv_string
2014 * Convert text string to AclMode value.
2015 */
2016static AclMode
2017convert_table_priv_string(text *priv_type_text)
2018{
2019 static const priv_map table_priv_map[] = {
2020 {"SELECT", ACL_SELECT},
2021 {"SELECT WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_SELECT)},
2022 {"INSERT", ACL_INSERT},
2023 {"INSERT WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_INSERT)},
2024 {"UPDATE", ACL_UPDATE},
2025 {"UPDATE WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_UPDATE)},
2026 {"DELETE", ACL_DELETE},
2027 {"DELETE WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_DELETE)},
2028 {"TRUNCATE", ACL_TRUNCATE},
2029 {"TRUNCATE WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_TRUNCATE)},
2030 {"REFERENCES", ACL_REFERENCES},
2031 {"REFERENCES WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_REFERENCES)},
2032 {"TRIGGER", ACL_TRIGGER},
2033 {"TRIGGER WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_TRIGGER)},
2034 {"RULE", 0}, /* ignore old RULE privileges */
2035 {"RULE WITH GRANT OPTION", 0},
2036 {NULL, 0}
2037 };
2038
2039 return convert_any_priv_string(priv_type_text, table_priv_map);
2040}
2041
2042/*
2043 * has_sequence_privilege variants
2044 * These are all named "has_sequence_privilege" at the SQL level.
2045 * They take various combinations of relation name, relation OID,
2046 * user name, user OID, or implicit user = current_user.
2047 *
2048 * The result is a boolean value: true if user has the indicated
2049 * privilege, false if not. The variants that take a relation OID
2050 * return NULL if the OID doesn't exist.
2051 */
2052
2053/*
2054 * has_sequence_privilege_name_name
2055 * Check user privileges on a sequence given
2056 * name username, text sequencename, and text priv name.
2057 */
2058Datum
2059has_sequence_privilege_name_name(PG_FUNCTION_ARGS)
2060{
2061 Name rolename = PG_GETARG_NAME(0);
2062 text *sequencename = PG_GETARG_TEXT_PP(1);
2063 text *priv_type_text = PG_GETARG_TEXT_PP(2);
2064 Oid roleid;
2065 Oid sequenceoid;
2066 AclMode mode;
2067 AclResult aclresult;
2068
2069 roleid = get_role_oid_or_public(NameStr(*rolename));
2070 mode = convert_sequence_priv_string(priv_type_text);
2071 sequenceoid = convert_table_name(sequencename);
2072 if (get_rel_relkind(sequenceoid) != RELKIND_SEQUENCE)
2073 ereport(ERROR,
2074 (errcode(ERRCODE_WRONG_OBJECT_TYPE),
2075 errmsg("\"%s\" is not a sequence",
2076 text_to_cstring(sequencename))));
2077
2078 aclresult = pg_class_aclcheck(sequenceoid, roleid, mode);
2079
2080 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
2081}
2082
2083/*
2084 * has_sequence_privilege_name
2085 * Check user privileges on a sequence given
2086 * text sequencename and text priv name.
2087 * current_user is assumed
2088 */
2089Datum
2090has_sequence_privilege_name(PG_FUNCTION_ARGS)
2091{
2092 text *sequencename = PG_GETARG_TEXT_PP(0);
2093 text *priv_type_text = PG_GETARG_TEXT_PP(1);
2094 Oid roleid;
2095 Oid sequenceoid;
2096 AclMode mode;
2097 AclResult aclresult;
2098
2099 roleid = GetUserId();
2100 mode = convert_sequence_priv_string(priv_type_text);
2101 sequenceoid = convert_table_name(sequencename);
2102 if (get_rel_relkind(sequenceoid) != RELKIND_SEQUENCE)
2103 ereport(ERROR,
2104 (errcode(ERRCODE_WRONG_OBJECT_TYPE),
2105 errmsg("\"%s\" is not a sequence",
2106 text_to_cstring(sequencename))));
2107
2108 aclresult = pg_class_aclcheck(sequenceoid, roleid, mode);
2109
2110 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
2111}
2112
2113/*
2114 * has_sequence_privilege_name_id
2115 * Check user privileges on a sequence given
2116 * name usename, sequence oid, and text priv name.
2117 */
2118Datum
2119has_sequence_privilege_name_id(PG_FUNCTION_ARGS)
2120{
2121 Name username = PG_GETARG_NAME(0);
2122 Oid sequenceoid = PG_GETARG_OID(1);
2123 text *priv_type_text = PG_GETARG_TEXT_PP(2);
2124 Oid roleid;
2125 AclMode mode;
2126 AclResult aclresult;
2127 char relkind;
2128
2129 roleid = get_role_oid_or_public(NameStr(*username));
2130 mode = convert_sequence_priv_string(priv_type_text);
2131 relkind = get_rel_relkind(sequenceoid);
2132 if (relkind == '\0')
2133 PG_RETURN_NULL();
2134 else if (relkind != RELKIND_SEQUENCE)
2135 ereport(ERROR,
2136 (errcode(ERRCODE_WRONG_OBJECT_TYPE),
2137 errmsg("\"%s\" is not a sequence",
2138 get_rel_name(sequenceoid))));
2139
2140 aclresult = pg_class_aclcheck(sequenceoid, roleid, mode);
2141
2142 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
2143}
2144
2145/*
2146 * has_sequence_privilege_id
2147 * Check user privileges on a sequence given
2148 * sequence oid, and text priv name.
2149 * current_user is assumed
2150 */
2151Datum
2152has_sequence_privilege_id(PG_FUNCTION_ARGS)
2153{
2154 Oid sequenceoid = PG_GETARG_OID(0);
2155 text *priv_type_text = PG_GETARG_TEXT_PP(1);
2156 Oid roleid;
2157 AclMode mode;
2158 AclResult aclresult;
2159 char relkind;
2160
2161 roleid = GetUserId();
2162 mode = convert_sequence_priv_string(priv_type_text);
2163 relkind = get_rel_relkind(sequenceoid);
2164 if (relkind == '\0')
2165 PG_RETURN_NULL();
2166 else if (relkind != RELKIND_SEQUENCE)
2167 ereport(ERROR,
2168 (errcode(ERRCODE_WRONG_OBJECT_TYPE),
2169 errmsg("\"%s\" is not a sequence",
2170 get_rel_name(sequenceoid))));
2171
2172 aclresult = pg_class_aclcheck(sequenceoid, roleid, mode);
2173
2174 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
2175}
2176
2177/*
2178 * has_sequence_privilege_id_name
2179 * Check user privileges on a sequence given
2180 * roleid, text sequencename, and text priv name.
2181 */
2182Datum
2183has_sequence_privilege_id_name(PG_FUNCTION_ARGS)
2184{
2185 Oid roleid = PG_GETARG_OID(0);
2186 text *sequencename = PG_GETARG_TEXT_PP(1);
2187 text *priv_type_text = PG_GETARG_TEXT_PP(2);
2188 Oid sequenceoid;
2189 AclMode mode;
2190 AclResult aclresult;
2191
2192 mode = convert_sequence_priv_string(priv_type_text);
2193 sequenceoid = convert_table_name(sequencename);
2194 if (get_rel_relkind(sequenceoid) != RELKIND_SEQUENCE)
2195 ereport(ERROR,
2196 (errcode(ERRCODE_WRONG_OBJECT_TYPE),
2197 errmsg("\"%s\" is not a sequence",
2198 text_to_cstring(sequencename))));
2199
2200 aclresult = pg_class_aclcheck(sequenceoid, roleid, mode);
2201
2202 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
2203}
2204
2205/*
2206 * has_sequence_privilege_id_id
2207 * Check user privileges on a sequence given
2208 * roleid, sequence oid, and text priv name.
2209 */
2210Datum
2211has_sequence_privilege_id_id(PG_FUNCTION_ARGS)
2212{
2213 Oid roleid = PG_GETARG_OID(0);
2214 Oid sequenceoid = PG_GETARG_OID(1);
2215 text *priv_type_text = PG_GETARG_TEXT_PP(2);
2216 AclMode mode;
2217 AclResult aclresult;
2218 char relkind;
2219
2220 mode = convert_sequence_priv_string(priv_type_text);
2221 relkind = get_rel_relkind(sequenceoid);
2222 if (relkind == '\0')
2223 PG_RETURN_NULL();
2224 else if (relkind != RELKIND_SEQUENCE)
2225 ereport(ERROR,
2226 (errcode(ERRCODE_WRONG_OBJECT_TYPE),
2227 errmsg("\"%s\" is not a sequence",
2228 get_rel_name(sequenceoid))));
2229
2230 aclresult = pg_class_aclcheck(sequenceoid, roleid, mode);
2231
2232 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
2233}
2234
2235/*
2236 * convert_sequence_priv_string
2237 * Convert text string to AclMode value.
2238 */
2239static AclMode
2240convert_sequence_priv_string(text *priv_type_text)
2241{
2242 static const priv_map sequence_priv_map[] = {
2243 {"USAGE", ACL_USAGE},
2244 {"USAGE WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_USAGE)},
2245 {"SELECT", ACL_SELECT},
2246 {"SELECT WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_SELECT)},
2247 {"UPDATE", ACL_UPDATE},
2248 {"UPDATE WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_UPDATE)},
2249 {NULL, 0}
2250 };
2251
2252 return convert_any_priv_string(priv_type_text, sequence_priv_map);
2253}
2254
2255
2256/*
2257 * has_any_column_privilege variants
2258 * These are all named "has_any_column_privilege" at the SQL level.
2259 * They take various combinations of relation name, relation OID,
2260 * user name, user OID, or implicit user = current_user.
2261 *
2262 * The result is a boolean value: true if user has the indicated
2263 * privilege for any column of the table, false if not. The variants
2264 * that take a relation OID return NULL if the OID doesn't exist.
2265 */
2266
2267/*
2268 * has_any_column_privilege_name_name
2269 * Check user privileges on any column of a table given
2270 * name username, text tablename, and text priv name.
2271 */
2272Datum
2273has_any_column_privilege_name_name(PG_FUNCTION_ARGS)
2274{
2275 Name rolename = PG_GETARG_NAME(0);
2276 text *tablename = PG_GETARG_TEXT_PP(1);
2277 text *priv_type_text = PG_GETARG_TEXT_PP(2);
2278 Oid roleid;
2279 Oid tableoid;
2280 AclMode mode;
2281 AclResult aclresult;
2282
2283 roleid = get_role_oid_or_public(NameStr(*rolename));
2284 tableoid = convert_table_name(tablename);
2285 mode = convert_column_priv_string(priv_type_text);
2286
2287 /* First check at table level, then examine each column if needed */
2288 aclresult = pg_class_aclcheck(tableoid, roleid, mode);
2289 if (aclresult != ACLCHECK_OK)
2290 aclresult = pg_attribute_aclcheck_all(tableoid, roleid, mode,
2291 ACLMASK_ANY);
2292
2293 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
2294}
2295
2296/*
2297 * has_any_column_privilege_name
2298 * Check user privileges on any column of a table given
2299 * text tablename and text priv name.
2300 * current_user is assumed
2301 */
2302Datum
2303has_any_column_privilege_name(PG_FUNCTION_ARGS)
2304{
2305 text *tablename = PG_GETARG_TEXT_PP(0);
2306 text *priv_type_text = PG_GETARG_TEXT_PP(1);
2307 Oid roleid;
2308 Oid tableoid;
2309 AclMode mode;
2310 AclResult aclresult;
2311
2312 roleid = GetUserId();
2313 tableoid = convert_table_name(tablename);
2314 mode = convert_column_priv_string(priv_type_text);
2315
2316 /* First check at table level, then examine each column if needed */
2317 aclresult = pg_class_aclcheck(tableoid, roleid, mode);
2318 if (aclresult != ACLCHECK_OK)
2319 aclresult = pg_attribute_aclcheck_all(tableoid, roleid, mode,
2320 ACLMASK_ANY);
2321
2322 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
2323}
2324
2325/*
2326 * has_any_column_privilege_name_id
2327 * Check user privileges on any column of a table given
2328 * name usename, table oid, and text priv name.
2329 */
2330Datum
2331has_any_column_privilege_name_id(PG_FUNCTION_ARGS)
2332{
2333 Name username = PG_GETARG_NAME(0);
2334 Oid tableoid = PG_GETARG_OID(1);
2335 text *priv_type_text = PG_GETARG_TEXT_PP(2);
2336 Oid roleid;
2337 AclMode mode;
2338 AclResult aclresult;
2339
2340 roleid = get_role_oid_or_public(NameStr(*username));
2341 mode = convert_column_priv_string(priv_type_text);
2342
2343 if (!SearchSysCacheExists1(RELOID, ObjectIdGetDatum(tableoid)))
2344 PG_RETURN_NULL();
2345
2346 /* First check at table level, then examine each column if needed */
2347 aclresult = pg_class_aclcheck(tableoid, roleid, mode);
2348 if (aclresult != ACLCHECK_OK)
2349 aclresult = pg_attribute_aclcheck_all(tableoid, roleid, mode,
2350 ACLMASK_ANY);
2351
2352 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
2353}
2354
2355/*
2356 * has_any_column_privilege_id
2357 * Check user privileges on any column of a table given
2358 * table oid, and text priv name.
2359 * current_user is assumed
2360 */
2361Datum
2362has_any_column_privilege_id(PG_FUNCTION_ARGS)
2363{
2364 Oid tableoid = PG_GETARG_OID(0);
2365 text *priv_type_text = PG_GETARG_TEXT_PP(1);
2366 Oid roleid;
2367 AclMode mode;
2368 AclResult aclresult;
2369
2370 roleid = GetUserId();
2371 mode = convert_column_priv_string(priv_type_text);
2372
2373 if (!SearchSysCacheExists1(RELOID, ObjectIdGetDatum(tableoid)))
2374 PG_RETURN_NULL();
2375
2376 /* First check at table level, then examine each column if needed */
2377 aclresult = pg_class_aclcheck(tableoid, roleid, mode);
2378 if (aclresult != ACLCHECK_OK)
2379 aclresult = pg_attribute_aclcheck_all(tableoid, roleid, mode,
2380 ACLMASK_ANY);
2381
2382 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
2383}
2384
2385/*
2386 * has_any_column_privilege_id_name
2387 * Check user privileges on any column of a table given
2388 * roleid, text tablename, and text priv name.
2389 */
2390Datum
2391has_any_column_privilege_id_name(PG_FUNCTION_ARGS)
2392{
2393 Oid roleid = PG_GETARG_OID(0);
2394 text *tablename = PG_GETARG_TEXT_PP(1);
2395 text *priv_type_text = PG_GETARG_TEXT_PP(2);
2396 Oid tableoid;
2397 AclMode mode;
2398 AclResult aclresult;
2399
2400 tableoid = convert_table_name(tablename);
2401 mode = convert_column_priv_string(priv_type_text);
2402
2403 /* First check at table level, then examine each column if needed */
2404 aclresult = pg_class_aclcheck(tableoid, roleid, mode);
2405 if (aclresult != ACLCHECK_OK)
2406 aclresult = pg_attribute_aclcheck_all(tableoid, roleid, mode,
2407 ACLMASK_ANY);
2408
2409 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
2410}
2411
2412/*
2413 * has_any_column_privilege_id_id
2414 * Check user privileges on any column of a table given
2415 * roleid, table oid, and text priv name.
2416 */
2417Datum
2418has_any_column_privilege_id_id(PG_FUNCTION_ARGS)
2419{
2420 Oid roleid = PG_GETARG_OID(0);
2421 Oid tableoid = PG_GETARG_OID(1);
2422 text *priv_type_text = PG_GETARG_TEXT_PP(2);
2423 AclMode mode;
2424 AclResult aclresult;
2425
2426 mode = convert_column_priv_string(priv_type_text);
2427
2428 if (!SearchSysCacheExists1(RELOID, ObjectIdGetDatum(tableoid)))
2429 PG_RETURN_NULL();
2430
2431 /* First check at table level, then examine each column if needed */
2432 aclresult = pg_class_aclcheck(tableoid, roleid, mode);
2433 if (aclresult != ACLCHECK_OK)
2434 aclresult = pg_attribute_aclcheck_all(tableoid, roleid, mode,
2435 ACLMASK_ANY);
2436
2437 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
2438}
2439
2440
2441/*
2442 * has_column_privilege variants
2443 * These are all named "has_column_privilege" at the SQL level.
2444 * They take various combinations of relation name, relation OID,
2445 * column name, column attnum, user name, user OID, or
2446 * implicit user = current_user.
2447 *
2448 * The result is a boolean value: true if user has the indicated
2449 * privilege, false if not. The variants that take a relation OID
2450 * return NULL (rather than throwing an error) if that relation OID
2451 * doesn't exist. Likewise, the variants that take an integer attnum
2452 * return NULL (rather than throwing an error) if there is no such
2453 * pg_attribute entry. All variants return NULL if an attisdropped
2454 * column is selected. These rules are meant to avoid unnecessary
2455 * failures in queries that scan pg_attribute.
2456 */
2457
2458/*
2459 * column_privilege_check: check column privileges, but don't throw an error
2460 * for dropped column or table
2461 *
2462 * Returns 1 if have the privilege, 0 if not, -1 if dropped column/table.
2463 */
2464static int
2465column_privilege_check(Oid tableoid, AttrNumber attnum,
2466 Oid roleid, AclMode mode)
2467{
2468 AclResult aclresult;
2469 HeapTuple attTuple;
2470 Form_pg_attribute attributeForm;
2471
2472 /*
2473 * If convert_column_name failed, we can just return -1 immediately.
2474 */
2475 if (attnum == InvalidAttrNumber)
2476 return -1;
2477
2478 /*
2479 * First check if we have the privilege at the table level. We check
2480 * existence of the pg_class row before risking calling pg_class_aclcheck.
2481 * Note: it might seem there's a race condition against concurrent DROP,
2482 * but really it's safe because there will be no syscache flush between
2483 * here and there. So if we see the row in the syscache, so will
2484 * pg_class_aclcheck.
2485 */
2486 if (!SearchSysCacheExists1(RELOID, ObjectIdGetDatum(tableoid)))
2487 return -1;
2488
2489 aclresult = pg_class_aclcheck(tableoid, roleid, mode);
2490
2491 if (aclresult == ACLCHECK_OK)
2492 return true;
2493
2494 /*
2495 * No table privilege, so try per-column privileges. Again, we have to
2496 * check for dropped attribute first, and we rely on the syscache not to
2497 * notice a concurrent drop before pg_attribute_aclcheck fetches the row.
2498 */
2499 attTuple = SearchSysCache2(ATTNUM,
2500 ObjectIdGetDatum(tableoid),
2501 Int16GetDatum(attnum));
2502 if (!HeapTupleIsValid(attTuple))
2503 return -1;
2504 attributeForm = (Form_pg_attribute) GETSTRUCT(attTuple);
2505 if (attributeForm->attisdropped)
2506 {
2507 ReleaseSysCache(attTuple);
2508 return -1;
2509 }
2510 ReleaseSysCache(attTuple);
2511
2512 aclresult = pg_attribute_aclcheck(tableoid, attnum, roleid, mode);
2513
2514 return (aclresult == ACLCHECK_OK);
2515}
2516
2517/*
2518 * has_column_privilege_name_name_name
2519 * Check user privileges on a column given
2520 * name username, text tablename, text colname, and text priv name.
2521 */
2522Datum
2523has_column_privilege_name_name_name(PG_FUNCTION_ARGS)
2524{
2525 Name rolename = PG_GETARG_NAME(0);
2526 text *tablename = PG_GETARG_TEXT_PP(1);
2527 text *column = PG_GETARG_TEXT_PP(2);
2528 text *priv_type_text = PG_GETARG_TEXT_PP(3);
2529 Oid roleid;
2530 Oid tableoid;
2531 AttrNumber colattnum;
2532 AclMode mode;
2533 int privresult;
2534
2535 roleid = get_role_oid_or_public(NameStr(*rolename));
2536 tableoid = convert_table_name(tablename);
2537 colattnum = convert_column_name(tableoid, column);
2538 mode = convert_column_priv_string(priv_type_text);
2539
2540 privresult = column_privilege_check(tableoid, colattnum, roleid, mode);
2541 if (privresult < 0)
2542 PG_RETURN_NULL();
2543 PG_RETURN_BOOL(privresult);
2544}
2545
2546/*
2547 * has_column_privilege_name_name_attnum
2548 * Check user privileges on a column given
2549 * name username, text tablename, int attnum, and text priv name.
2550 */
2551Datum
2552has_column_privilege_name_name_attnum(PG_FUNCTION_ARGS)
2553{
2554 Name rolename = PG_GETARG_NAME(0);
2555 text *tablename = PG_GETARG_TEXT_PP(1);
2556 AttrNumber colattnum = PG_GETARG_INT16(2);
2557 text *priv_type_text = PG_GETARG_TEXT_PP(3);
2558 Oid roleid;
2559 Oid tableoid;
2560 AclMode mode;
2561 int privresult;
2562
2563 roleid = get_role_oid_or_public(NameStr(*rolename));
2564 tableoid = convert_table_name(tablename);
2565 mode = convert_column_priv_string(priv_type_text);
2566
2567 privresult = column_privilege_check(tableoid, colattnum, roleid, mode);
2568 if (privresult < 0)
2569 PG_RETURN_NULL();
2570 PG_RETURN_BOOL(privresult);
2571}
2572
2573/*
2574 * has_column_privilege_name_id_name
2575 * Check user privileges on a column given
2576 * name username, table oid, text colname, and text priv name.
2577 */
2578Datum
2579has_column_privilege_name_id_name(PG_FUNCTION_ARGS)
2580{
2581 Name username = PG_GETARG_NAME(0);
2582 Oid tableoid = PG_GETARG_OID(1);
2583 text *column = PG_GETARG_TEXT_PP(2);
2584 text *priv_type_text = PG_GETARG_TEXT_PP(3);
2585 Oid roleid;
2586 AttrNumber colattnum;
2587 AclMode mode;
2588 int privresult;
2589
2590 roleid = get_role_oid_or_public(NameStr(*username));
2591 colattnum = convert_column_name(tableoid, column);
2592 mode = convert_column_priv_string(priv_type_text);
2593
2594 privresult = column_privilege_check(tableoid, colattnum, roleid, mode);
2595 if (privresult < 0)
2596 PG_RETURN_NULL();
2597 PG_RETURN_BOOL(privresult);
2598}
2599
2600/*
2601 * has_column_privilege_name_id_attnum
2602 * Check user privileges on a column given
2603 * name username, table oid, int attnum, and text priv name.
2604 */
2605Datum
2606has_column_privilege_name_id_attnum(PG_FUNCTION_ARGS)
2607{
2608 Name username = PG_GETARG_NAME(0);
2609 Oid tableoid = PG_GETARG_OID(1);
2610 AttrNumber colattnum = PG_GETARG_INT16(2);
2611 text *priv_type_text = PG_GETARG_TEXT_PP(3);
2612 Oid roleid;
2613 AclMode mode;
2614 int privresult;
2615
2616 roleid = get_role_oid_or_public(NameStr(*username));
2617 mode = convert_column_priv_string(priv_type_text);
2618
2619 privresult = column_privilege_check(tableoid, colattnum, roleid, mode);
2620 if (privresult < 0)
2621 PG_RETURN_NULL();
2622 PG_RETURN_BOOL(privresult);
2623}
2624
2625/*
2626 * has_column_privilege_id_name_name
2627 * Check user privileges on a column given
2628 * oid roleid, text tablename, text colname, and text priv name.
2629 */
2630Datum
2631has_column_privilege_id_name_name(PG_FUNCTION_ARGS)
2632{
2633 Oid roleid = PG_GETARG_OID(0);
2634 text *tablename = PG_GETARG_TEXT_PP(1);
2635 text *column = PG_GETARG_TEXT_PP(2);
2636 text *priv_type_text = PG_GETARG_TEXT_PP(3);
2637 Oid tableoid;
2638 AttrNumber colattnum;
2639 AclMode mode;
2640 int privresult;
2641
2642 tableoid = convert_table_name(tablename);
2643 colattnum = convert_column_name(tableoid, column);
2644 mode = convert_column_priv_string(priv_type_text);
2645
2646 privresult = column_privilege_check(tableoid, colattnum, roleid, mode);
2647 if (privresult < 0)
2648 PG_RETURN_NULL();
2649 PG_RETURN_BOOL(privresult);
2650}
2651
2652/*
2653 * has_column_privilege_id_name_attnum
2654 * Check user privileges on a column given
2655 * oid roleid, text tablename, int attnum, and text priv name.
2656 */
2657Datum
2658has_column_privilege_id_name_attnum(PG_FUNCTION_ARGS)
2659{
2660 Oid roleid = PG_GETARG_OID(0);
2661 text *tablename = PG_GETARG_TEXT_PP(1);
2662 AttrNumber colattnum = PG_GETARG_INT16(2);
2663 text *priv_type_text = PG_GETARG_TEXT_PP(3);
2664 Oid tableoid;
2665 AclMode mode;
2666 int privresult;
2667
2668 tableoid = convert_table_name(tablename);
2669 mode = convert_column_priv_string(priv_type_text);
2670
2671 privresult = column_privilege_check(tableoid, colattnum, roleid, mode);
2672 if (privresult < 0)
2673 PG_RETURN_NULL();
2674 PG_RETURN_BOOL(privresult);
2675}
2676
2677/*
2678 * has_column_privilege_id_id_name
2679 * Check user privileges on a column given
2680 * oid roleid, table oid, text colname, and text priv name.
2681 */
2682Datum
2683has_column_privilege_id_id_name(PG_FUNCTION_ARGS)
2684{
2685 Oid roleid = PG_GETARG_OID(0);
2686 Oid tableoid = PG_GETARG_OID(1);
2687 text *column = PG_GETARG_TEXT_PP(2);
2688 text *priv_type_text = PG_GETARG_TEXT_PP(3);
2689 AttrNumber colattnum;
2690 AclMode mode;
2691 int privresult;
2692
2693 colattnum = convert_column_name(tableoid, column);
2694 mode = convert_column_priv_string(priv_type_text);
2695
2696 privresult = column_privilege_check(tableoid, colattnum, roleid, mode);
2697 if (privresult < 0)
2698 PG_RETURN_NULL();
2699 PG_RETURN_BOOL(privresult);
2700}
2701
2702/*
2703 * has_column_privilege_id_id_attnum
2704 * Check user privileges on a column given
2705 * oid roleid, table oid, int attnum, and text priv name.
2706 */
2707Datum
2708has_column_privilege_id_id_attnum(PG_FUNCTION_ARGS)
2709{
2710 Oid roleid = PG_GETARG_OID(0);
2711 Oid tableoid = PG_GETARG_OID(1);
2712 AttrNumber colattnum = PG_GETARG_INT16(2);
2713 text *priv_type_text = PG_GETARG_TEXT_PP(3);
2714 AclMode mode;
2715 int privresult;
2716
2717 mode = convert_column_priv_string(priv_type_text);
2718
2719 privresult = column_privilege_check(tableoid, colattnum, roleid, mode);
2720 if (privresult < 0)
2721 PG_RETURN_NULL();
2722 PG_RETURN_BOOL(privresult);
2723}
2724
2725/*
2726 * has_column_privilege_name_name
2727 * Check user privileges on a column given
2728 * text tablename, text colname, and text priv name.
2729 * current_user is assumed
2730 */
2731Datum
2732has_column_privilege_name_name(PG_FUNCTION_ARGS)
2733{
2734 text *tablename = PG_GETARG_TEXT_PP(0);
2735 text *column = PG_GETARG_TEXT_PP(1);
2736 text *priv_type_text = PG_GETARG_TEXT_PP(2);
2737 Oid roleid;
2738 Oid tableoid;
2739 AttrNumber colattnum;
2740 AclMode mode;
2741 int privresult;
2742
2743 roleid = GetUserId();
2744 tableoid = convert_table_name(tablename);
2745 colattnum = convert_column_name(tableoid, column);
2746 mode = convert_column_priv_string(priv_type_text);
2747
2748 privresult = column_privilege_check(tableoid, colattnum, roleid, mode);
2749 if (privresult < 0)
2750 PG_RETURN_NULL();
2751 PG_RETURN_BOOL(privresult);
2752}
2753
2754/*
2755 * has_column_privilege_name_attnum
2756 * Check user privileges on a column given
2757 * text tablename, int attnum, and text priv name.
2758 * current_user is assumed
2759 */
2760Datum
2761has_column_privilege_name_attnum(PG_FUNCTION_ARGS)
2762{
2763 text *tablename = PG_GETARG_TEXT_PP(0);
2764 AttrNumber colattnum = PG_GETARG_INT16(1);
2765 text *priv_type_text = PG_GETARG_TEXT_PP(2);
2766 Oid roleid;
2767 Oid tableoid;
2768 AclMode mode;
2769 int privresult;
2770
2771 roleid = GetUserId();
2772 tableoid = convert_table_name(tablename);
2773 mode = convert_column_priv_string(priv_type_text);
2774
2775 privresult = column_privilege_check(tableoid, colattnum, roleid, mode);
2776 if (privresult < 0)
2777 PG_RETURN_NULL();
2778 PG_RETURN_BOOL(privresult);
2779}
2780
2781/*
2782 * has_column_privilege_id_name
2783 * Check user privileges on a column given
2784 * table oid, text colname, and text priv name.
2785 * current_user is assumed
2786 */
2787Datum
2788has_column_privilege_id_name(PG_FUNCTION_ARGS)
2789{
2790 Oid tableoid = PG_GETARG_OID(0);
2791 text *column = PG_GETARG_TEXT_PP(1);
2792 text *priv_type_text = PG_GETARG_TEXT_PP(2);
2793 Oid roleid;
2794 AttrNumber colattnum;
2795 AclMode mode;
2796 int privresult;
2797
2798 roleid = GetUserId();
2799 colattnum = convert_column_name(tableoid, column);
2800 mode = convert_column_priv_string(priv_type_text);
2801
2802 privresult = column_privilege_check(tableoid, colattnum, roleid, mode);
2803 if (privresult < 0)
2804 PG_RETURN_NULL();
2805 PG_RETURN_BOOL(privresult);
2806}
2807
2808/*
2809 * has_column_privilege_id_attnum
2810 * Check user privileges on a column given
2811 * table oid, int attnum, and text priv name.
2812 * current_user is assumed
2813 */
2814Datum
2815has_column_privilege_id_attnum(PG_FUNCTION_ARGS)
2816{
2817 Oid tableoid = PG_GETARG_OID(0);
2818 AttrNumber colattnum = PG_GETARG_INT16(1);
2819 text *priv_type_text = PG_GETARG_TEXT_PP(2);
2820 Oid roleid;
2821 AclMode mode;
2822 int privresult;
2823
2824 roleid = GetUserId();
2825 mode = convert_column_priv_string(priv_type_text);
2826
2827 privresult = column_privilege_check(tableoid, colattnum, roleid, mode);
2828 if (privresult < 0)
2829 PG_RETURN_NULL();
2830 PG_RETURN_BOOL(privresult);
2831}
2832
2833/*
2834 * Support routines for has_column_privilege family.
2835 */
2836
2837/*
2838 * Given a table OID and a column name expressed as a string, look it up
2839 * and return the column number. Returns InvalidAttrNumber in cases
2840 * where caller should return NULL instead of failing.
2841 */
2842static AttrNumber
2843convert_column_name(Oid tableoid, text *column)
2844{
2845 char *colname;
2846 HeapTuple attTuple;
2847 AttrNumber attnum;
2848
2849 colname = text_to_cstring(column);
2850
2851 /*
2852 * We don't use get_attnum() here because it will report that dropped
2853 * columns don't exist. We need to treat dropped columns differently from
2854 * nonexistent columns.
2855 */
2856 attTuple = SearchSysCache2(ATTNAME,
2857 ObjectIdGetDatum(tableoid),
2858 CStringGetDatum(colname));
2859 if (HeapTupleIsValid(attTuple))
2860 {
2861 Form_pg_attribute attributeForm;
2862
2863 attributeForm = (Form_pg_attribute) GETSTRUCT(attTuple);
2864 /* We want to return NULL for dropped columns */
2865 if (attributeForm->attisdropped)
2866 attnum = InvalidAttrNumber;
2867 else
2868 attnum = attributeForm->attnum;
2869 ReleaseSysCache(attTuple);
2870 }
2871 else
2872 {
2873 char *tablename = get_rel_name(tableoid);
2874
2875 /*
2876 * If the table OID is bogus, or it's just been dropped, we'll get
2877 * NULL back. In such cases we want has_column_privilege to return
2878 * NULL too, so just return InvalidAttrNumber.
2879 */
2880 if (tablename != NULL)
2881 {
2882 /* tableoid exists, colname does not, so throw error */
2883 ereport(ERROR,
2884 (errcode(ERRCODE_UNDEFINED_COLUMN),
2885 errmsg("column \"%s\" of relation \"%s\" does not exist",
2886 colname, tablename)));
2887 }
2888 /* tableoid doesn't exist, so act like attisdropped case */
2889 attnum = InvalidAttrNumber;
2890 }
2891
2892 pfree(colname);
2893 return attnum;
2894}
2895
2896/*
2897 * convert_column_priv_string
2898 * Convert text string to AclMode value.
2899 */
2900static AclMode
2901convert_column_priv_string(text *priv_type_text)
2902{
2903 static const priv_map column_priv_map[] = {
2904 {"SELECT", ACL_SELECT},
2905 {"SELECT WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_SELECT)},
2906 {"INSERT", ACL_INSERT},
2907 {"INSERT WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_INSERT)},
2908 {"UPDATE", ACL_UPDATE},
2909 {"UPDATE WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_UPDATE)},
2910 {"REFERENCES", ACL_REFERENCES},
2911 {"REFERENCES WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_REFERENCES)},
2912 {NULL, 0}
2913 };
2914
2915 return convert_any_priv_string(priv_type_text, column_priv_map);
2916}
2917
2918
2919/*
2920 * has_database_privilege variants
2921 * These are all named "has_database_privilege" at the SQL level.
2922 * They take various combinations of database name, database OID,
2923 * user name, user OID, or implicit user = current_user.
2924 *
2925 * The result is a boolean value: true if user has the indicated
2926 * privilege, false if not, or NULL if object doesn't exist.
2927 */
2928
2929/*
2930 * has_database_privilege_name_name
2931 * Check user privileges on a database given
2932 * name username, text databasename, and text priv name.
2933 */
2934Datum
2935has_database_privilege_name_name(PG_FUNCTION_ARGS)
2936{
2937 Name username = PG_GETARG_NAME(0);
2938 text *databasename = PG_GETARG_TEXT_PP(1);
2939 text *priv_type_text = PG_GETARG_TEXT_PP(2);
2940 Oid roleid;
2941 Oid databaseoid;
2942 AclMode mode;
2943 AclResult aclresult;
2944
2945 roleid = get_role_oid_or_public(NameStr(*username));
2946 databaseoid = convert_database_name(databasename);
2947 mode = convert_database_priv_string(priv_type_text);
2948
2949 aclresult = pg_database_aclcheck(databaseoid, roleid, mode);
2950
2951 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
2952}
2953
2954/*
2955 * has_database_privilege_name
2956 * Check user privileges on a database given
2957 * text databasename and text priv name.
2958 * current_user is assumed
2959 */
2960Datum
2961has_database_privilege_name(PG_FUNCTION_ARGS)
2962{
2963 text *databasename = PG_GETARG_TEXT_PP(0);
2964 text *priv_type_text = PG_GETARG_TEXT_PP(1);
2965 Oid roleid;
2966 Oid databaseoid;
2967 AclMode mode;
2968 AclResult aclresult;
2969
2970 roleid = GetUserId();
2971 databaseoid = convert_database_name(databasename);
2972 mode = convert_database_priv_string(priv_type_text);
2973
2974 aclresult = pg_database_aclcheck(databaseoid, roleid, mode);
2975
2976 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
2977}
2978
2979/*
2980 * has_database_privilege_name_id
2981 * Check user privileges on a database given
2982 * name usename, database oid, and text priv name.
2983 */
2984Datum
2985has_database_privilege_name_id(PG_FUNCTION_ARGS)
2986{
2987 Name username = PG_GETARG_NAME(0);
2988 Oid databaseoid = PG_GETARG_OID(1);
2989 text *priv_type_text = PG_GETARG_TEXT_PP(2);
2990 Oid roleid;
2991 AclMode mode;
2992 AclResult aclresult;
2993
2994 roleid = get_role_oid_or_public(NameStr(*username));
2995 mode = convert_database_priv_string(priv_type_text);
2996
2997 if (!SearchSysCacheExists1(DATABASEOID, ObjectIdGetDatum(databaseoid)))
2998 PG_RETURN_NULL();
2999
3000 aclresult = pg_database_aclcheck(databaseoid, roleid, mode);
3001
3002 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3003}
3004
3005/*
3006 * has_database_privilege_id
3007 * Check user privileges on a database given
3008 * database oid, and text priv name.
3009 * current_user is assumed
3010 */
3011Datum
3012has_database_privilege_id(PG_FUNCTION_ARGS)
3013{
3014 Oid databaseoid = PG_GETARG_OID(0);
3015 text *priv_type_text = PG_GETARG_TEXT_PP(1);
3016 Oid roleid;
3017 AclMode mode;
3018 AclResult aclresult;
3019
3020 roleid = GetUserId();
3021 mode = convert_database_priv_string(priv_type_text);
3022
3023 if (!SearchSysCacheExists1(DATABASEOID, ObjectIdGetDatum(databaseoid)))
3024 PG_RETURN_NULL();
3025
3026 aclresult = pg_database_aclcheck(databaseoid, roleid, mode);
3027
3028 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3029}
3030
3031/*
3032 * has_database_privilege_id_name
3033 * Check user privileges on a database given
3034 * roleid, text databasename, and text priv name.
3035 */
3036Datum
3037has_database_privilege_id_name(PG_FUNCTION_ARGS)
3038{
3039 Oid roleid = PG_GETARG_OID(0);
3040 text *databasename = PG_GETARG_TEXT_PP(1);
3041 text *priv_type_text = PG_GETARG_TEXT_PP(2);
3042 Oid databaseoid;
3043 AclMode mode;
3044 AclResult aclresult;
3045
3046 databaseoid = convert_database_name(databasename);
3047 mode = convert_database_priv_string(priv_type_text);
3048
3049 aclresult = pg_database_aclcheck(databaseoid, roleid, mode);
3050
3051 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3052}
3053
3054/*
3055 * has_database_privilege_id_id
3056 * Check user privileges on a database given
3057 * roleid, database oid, and text priv name.
3058 */
3059Datum
3060has_database_privilege_id_id(PG_FUNCTION_ARGS)
3061{
3062 Oid roleid = PG_GETARG_OID(0);
3063 Oid databaseoid = PG_GETARG_OID(1);
3064 text *priv_type_text = PG_GETARG_TEXT_PP(2);
3065 AclMode mode;
3066 AclResult aclresult;
3067
3068 mode = convert_database_priv_string(priv_type_text);
3069
3070 if (!SearchSysCacheExists1(DATABASEOID, ObjectIdGetDatum(databaseoid)))
3071 PG_RETURN_NULL();
3072
3073 aclresult = pg_database_aclcheck(databaseoid, roleid, mode);
3074
3075 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3076}
3077
3078/*
3079 * Support routines for has_database_privilege family.
3080 */
3081
3082/*
3083 * Given a database name expressed as a string, look it up and return Oid
3084 */
3085static Oid
3086convert_database_name(text *databasename)
3087{
3088 char *dbname = text_to_cstring(databasename);
3089
3090 return get_database_oid(dbname, false);
3091}
3092
3093/*
3094 * convert_database_priv_string
3095 * Convert text string to AclMode value.
3096 */
3097static AclMode
3098convert_database_priv_string(text *priv_type_text)
3099{
3100 static const priv_map database_priv_map[] = {
3101 {"CREATE", ACL_CREATE},
3102 {"CREATE WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_CREATE)},
3103 {"TEMPORARY", ACL_CREATE_TEMP},
3104 {"TEMPORARY WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_CREATE_TEMP)},
3105 {"TEMP", ACL_CREATE_TEMP},
3106 {"TEMP WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_CREATE_TEMP)},
3107 {"CONNECT", ACL_CONNECT},
3108 {"CONNECT WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_CONNECT)},
3109 {NULL, 0}
3110 };
3111
3112 return convert_any_priv_string(priv_type_text, database_priv_map);
3113
3114}
3115
3116
3117/*
3118 * has_foreign_data_wrapper_privilege variants
3119 * These are all named "has_foreign_data_wrapper_privilege" at the SQL level.
3120 * They take various combinations of foreign-data wrapper name,
3121 * fdw OID, user name, user OID, or implicit user = current_user.
3122 *
3123 * The result is a boolean value: true if user has the indicated
3124 * privilege, false if not.
3125 */
3126
3127/*
3128 * has_foreign_data_wrapper_privilege_name_name
3129 * Check user privileges on a foreign-data wrapper given
3130 * name username, text fdwname, and text priv name.
3131 */
3132Datum
3133has_foreign_data_wrapper_privilege_name_name(PG_FUNCTION_ARGS)
3134{
3135 Name username = PG_GETARG_NAME(0);
3136 text *fdwname = PG_GETARG_TEXT_PP(1);
3137 text *priv_type_text = PG_GETARG_TEXT_PP(2);
3138 Oid roleid;
3139 Oid fdwid;
3140 AclMode mode;
3141 AclResult aclresult;
3142
3143 roleid = get_role_oid_or_public(NameStr(*username));
3144 fdwid = convert_foreign_data_wrapper_name(fdwname);
3145 mode = convert_foreign_data_wrapper_priv_string(priv_type_text);
3146
3147 aclresult = pg_foreign_data_wrapper_aclcheck(fdwid, roleid, mode);
3148
3149 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3150}
3151
3152/*
3153 * has_foreign_data_wrapper_privilege_name
3154 * Check user privileges on a foreign-data wrapper given
3155 * text fdwname and text priv name.
3156 * current_user is assumed
3157 */
3158Datum
3159has_foreign_data_wrapper_privilege_name(PG_FUNCTION_ARGS)
3160{
3161 text *fdwname = PG_GETARG_TEXT_PP(0);
3162 text *priv_type_text = PG_GETARG_TEXT_PP(1);
3163 Oid roleid;
3164 Oid fdwid;
3165 AclMode mode;
3166 AclResult aclresult;
3167
3168 roleid = GetUserId();
3169 fdwid = convert_foreign_data_wrapper_name(fdwname);
3170 mode = convert_foreign_data_wrapper_priv_string(priv_type_text);
3171
3172 aclresult = pg_foreign_data_wrapper_aclcheck(fdwid, roleid, mode);
3173
3174 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3175}
3176
3177/*
3178 * has_foreign_data_wrapper_privilege_name_id
3179 * Check user privileges on a foreign-data wrapper given
3180 * name usename, foreign-data wrapper oid, and text priv name.
3181 */
3182Datum
3183has_foreign_data_wrapper_privilege_name_id(PG_FUNCTION_ARGS)
3184{
3185 Name username = PG_GETARG_NAME(0);
3186 Oid fdwid = PG_GETARG_OID(1);
3187 text *priv_type_text = PG_GETARG_TEXT_PP(2);
3188 Oid roleid;
3189 AclMode mode;
3190 AclResult aclresult;
3191
3192 roleid = get_role_oid_or_public(NameStr(*username));
3193 mode = convert_foreign_data_wrapper_priv_string(priv_type_text);
3194
3195 if (!SearchSysCacheExists1(FOREIGNDATAWRAPPEROID, ObjectIdGetDatum(fdwid)))
3196 PG_RETURN_NULL();
3197
3198 aclresult = pg_foreign_data_wrapper_aclcheck(fdwid, roleid, mode);
3199
3200 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3201}
3202
3203/*
3204 * has_foreign_data_wrapper_privilege_id
3205 * Check user privileges on a foreign-data wrapper given
3206 * foreign-data wrapper oid, and text priv name.
3207 * current_user is assumed
3208 */
3209Datum
3210has_foreign_data_wrapper_privilege_id(PG_FUNCTION_ARGS)
3211{
3212 Oid fdwid = PG_GETARG_OID(0);
3213 text *priv_type_text = PG_GETARG_TEXT_PP(1);
3214 Oid roleid;
3215 AclMode mode;
3216 AclResult aclresult;
3217
3218 roleid = GetUserId();
3219 mode = convert_foreign_data_wrapper_priv_string(priv_type_text);
3220
3221 if (!SearchSysCacheExists1(FOREIGNDATAWRAPPEROID, ObjectIdGetDatum(fdwid)))
3222 PG_RETURN_NULL();
3223
3224 aclresult = pg_foreign_data_wrapper_aclcheck(fdwid, roleid, mode);
3225
3226 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3227}
3228
3229/*
3230 * has_foreign_data_wrapper_privilege_id_name
3231 * Check user privileges on a foreign-data wrapper given
3232 * roleid, text fdwname, and text priv name.
3233 */
3234Datum
3235has_foreign_data_wrapper_privilege_id_name(PG_FUNCTION_ARGS)
3236{
3237 Oid roleid = PG_GETARG_OID(0);
3238 text *fdwname = PG_GETARG_TEXT_PP(1);
3239 text *priv_type_text = PG_GETARG_TEXT_PP(2);
3240 Oid fdwid;
3241 AclMode mode;
3242 AclResult aclresult;
3243
3244 fdwid = convert_foreign_data_wrapper_name(fdwname);
3245 mode = convert_foreign_data_wrapper_priv_string(priv_type_text);
3246
3247 aclresult = pg_foreign_data_wrapper_aclcheck(fdwid, roleid, mode);
3248
3249 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3250}
3251
3252/*
3253 * has_foreign_data_wrapper_privilege_id_id
3254 * Check user privileges on a foreign-data wrapper given
3255 * roleid, fdw oid, and text priv name.
3256 */
3257Datum
3258has_foreign_data_wrapper_privilege_id_id(PG_FUNCTION_ARGS)
3259{
3260 Oid roleid = PG_GETARG_OID(0);
3261 Oid fdwid = PG_GETARG_OID(1);
3262 text *priv_type_text = PG_GETARG_TEXT_PP(2);
3263 AclMode mode;
3264 AclResult aclresult;
3265
3266 mode = convert_foreign_data_wrapper_priv_string(priv_type_text);
3267
3268 if (!SearchSysCacheExists1(FOREIGNDATAWRAPPEROID, ObjectIdGetDatum(fdwid)))
3269 PG_RETURN_NULL();
3270
3271 aclresult = pg_foreign_data_wrapper_aclcheck(fdwid, roleid, mode);
3272
3273 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3274}
3275
3276/*
3277 * Support routines for has_foreign_data_wrapper_privilege family.
3278 */
3279
3280/*
3281 * Given a FDW name expressed as a string, look it up and return Oid
3282 */
3283static Oid
3284convert_foreign_data_wrapper_name(text *fdwname)
3285{
3286 char *fdwstr = text_to_cstring(fdwname);
3287
3288 return get_foreign_data_wrapper_oid(fdwstr, false);
3289}
3290
3291/*
3292 * convert_foreign_data_wrapper_priv_string
3293 * Convert text string to AclMode value.
3294 */
3295static AclMode
3296convert_foreign_data_wrapper_priv_string(text *priv_type_text)
3297{
3298 static const priv_map foreign_data_wrapper_priv_map[] = {
3299 {"USAGE", ACL_USAGE},
3300 {"USAGE WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_USAGE)},
3301 {NULL, 0}
3302 };
3303
3304 return convert_any_priv_string(priv_type_text, foreign_data_wrapper_priv_map);
3305}
3306
3307
3308/*
3309 * has_function_privilege variants
3310 * These are all named "has_function_privilege" at the SQL level.
3311 * They take various combinations of function name, function OID,
3312 * user name, user OID, or implicit user = current_user.
3313 *
3314 * The result is a boolean value: true if user has the indicated
3315 * privilege, false if not, or NULL if object doesn't exist.
3316 */
3317
3318/*
3319 * has_function_privilege_name_name
3320 * Check user privileges on a function given
3321 * name username, text functionname, and text priv name.
3322 */
3323Datum
3324has_function_privilege_name_name(PG_FUNCTION_ARGS)
3325{
3326 Name username = PG_GETARG_NAME(0);
3327 text *functionname = PG_GETARG_TEXT_PP(1);
3328 text *priv_type_text = PG_GETARG_TEXT_PP(2);
3329 Oid roleid;
3330 Oid functionoid;
3331 AclMode mode;
3332 AclResult aclresult;
3333
3334 roleid = get_role_oid_or_public(NameStr(*username));
3335 functionoid = convert_function_name(functionname);
3336 mode = convert_function_priv_string(priv_type_text);
3337
3338 aclresult = pg_proc_aclcheck(functionoid, roleid, mode);
3339
3340 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3341}
3342
3343/*
3344 * has_function_privilege_name
3345 * Check user privileges on a function given
3346 * text functionname and text priv name.
3347 * current_user is assumed
3348 */
3349Datum
3350has_function_privilege_name(PG_FUNCTION_ARGS)
3351{
3352 text *functionname = PG_GETARG_TEXT_PP(0);
3353 text *priv_type_text = PG_GETARG_TEXT_PP(1);
3354 Oid roleid;
3355 Oid functionoid;
3356 AclMode mode;
3357 AclResult aclresult;
3358
3359 roleid = GetUserId();
3360 functionoid = convert_function_name(functionname);
3361 mode = convert_function_priv_string(priv_type_text);
3362
3363 aclresult = pg_proc_aclcheck(functionoid, roleid, mode);
3364
3365 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3366}
3367
3368/*
3369 * has_function_privilege_name_id
3370 * Check user privileges on a function given
3371 * name usename, function oid, and text priv name.
3372 */
3373Datum
3374has_function_privilege_name_id(PG_FUNCTION_ARGS)
3375{
3376 Name username = PG_GETARG_NAME(0);
3377 Oid functionoid = PG_GETARG_OID(1);
3378 text *priv_type_text = PG_GETARG_TEXT_PP(2);
3379 Oid roleid;
3380 AclMode mode;
3381 AclResult aclresult;
3382
3383 roleid = get_role_oid_or_public(NameStr(*username));
3384 mode = convert_function_priv_string(priv_type_text);
3385
3386 if (!SearchSysCacheExists1(PROCOID, ObjectIdGetDatum(functionoid)))
3387 PG_RETURN_NULL();
3388
3389 aclresult = pg_proc_aclcheck(functionoid, roleid, mode);
3390
3391 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3392}
3393
3394/*
3395 * has_function_privilege_id
3396 * Check user privileges on a function given
3397 * function oid, and text priv name.
3398 * current_user is assumed
3399 */
3400Datum
3401has_function_privilege_id(PG_FUNCTION_ARGS)
3402{
3403 Oid functionoid = PG_GETARG_OID(0);
3404 text *priv_type_text = PG_GETARG_TEXT_PP(1);
3405 Oid roleid;
3406 AclMode mode;
3407 AclResult aclresult;
3408
3409 roleid = GetUserId();
3410 mode = convert_function_priv_string(priv_type_text);
3411
3412 if (!SearchSysCacheExists1(PROCOID, ObjectIdGetDatum(functionoid)))
3413 PG_RETURN_NULL();
3414
3415 aclresult = pg_proc_aclcheck(functionoid, roleid, mode);
3416
3417 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3418}
3419
3420/*
3421 * has_function_privilege_id_name
3422 * Check user privileges on a function given
3423 * roleid, text functionname, and text priv name.
3424 */
3425Datum
3426has_function_privilege_id_name(PG_FUNCTION_ARGS)
3427{
3428 Oid roleid = PG_GETARG_OID(0);
3429 text *functionname = PG_GETARG_TEXT_PP(1);
3430 text *priv_type_text = PG_GETARG_TEXT_PP(2);
3431 Oid functionoid;
3432 AclMode mode;
3433 AclResult aclresult;
3434
3435 functionoid = convert_function_name(functionname);
3436 mode = convert_function_priv_string(priv_type_text);
3437
3438 aclresult = pg_proc_aclcheck(functionoid, roleid, mode);
3439
3440 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3441}
3442
3443/*
3444 * has_function_privilege_id_id
3445 * Check user privileges on a function given
3446 * roleid, function oid, and text priv name.
3447 */
3448Datum
3449has_function_privilege_id_id(PG_FUNCTION_ARGS)
3450{
3451 Oid roleid = PG_GETARG_OID(0);
3452 Oid functionoid = PG_GETARG_OID(1);
3453 text *priv_type_text = PG_GETARG_TEXT_PP(2);
3454 AclMode mode;
3455 AclResult aclresult;
3456
3457 mode = convert_function_priv_string(priv_type_text);
3458
3459 if (!SearchSysCacheExists1(PROCOID, ObjectIdGetDatum(functionoid)))
3460 PG_RETURN_NULL();
3461
3462 aclresult = pg_proc_aclcheck(functionoid, roleid, mode);
3463
3464 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3465}
3466
3467/*
3468 * Support routines for has_function_privilege family.
3469 */
3470
3471/*
3472 * Given a function name expressed as a string, look it up and return Oid
3473 */
3474static Oid
3475convert_function_name(text *functionname)
3476{
3477 char *funcname = text_to_cstring(functionname);
3478 Oid oid;
3479
3480 oid = DatumGetObjectId(DirectFunctionCall1(regprocedurein,
3481 CStringGetDatum(funcname)));
3482
3483 if (!OidIsValid(oid))
3484 ereport(ERROR,
3485 (errcode(ERRCODE_UNDEFINED_FUNCTION),
3486 errmsg("function \"%s\" does not exist", funcname)));
3487
3488 return oid;
3489}
3490
3491/*
3492 * convert_function_priv_string
3493 * Convert text string to AclMode value.
3494 */
3495static AclMode
3496convert_function_priv_string(text *priv_type_text)
3497{
3498 static const priv_map function_priv_map[] = {
3499 {"EXECUTE", ACL_EXECUTE},
3500 {"EXECUTE WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_EXECUTE)},
3501 {NULL, 0}
3502 };
3503
3504 return convert_any_priv_string(priv_type_text, function_priv_map);
3505}
3506
3507
3508/*
3509 * has_language_privilege variants
3510 * These are all named "has_language_privilege" at the SQL level.
3511 * They take various combinations of language name, language OID,
3512 * user name, user OID, or implicit user = current_user.
3513 *
3514 * The result is a boolean value: true if user has the indicated
3515 * privilege, false if not, or NULL if object doesn't exist.
3516 */
3517
3518/*
3519 * has_language_privilege_name_name
3520 * Check user privileges on a language given
3521 * name username, text languagename, and text priv name.
3522 */
3523Datum
3524has_language_privilege_name_name(PG_FUNCTION_ARGS)
3525{
3526 Name username = PG_GETARG_NAME(0);
3527 text *languagename = PG_GETARG_TEXT_PP(1);
3528 text *priv_type_text = PG_GETARG_TEXT_PP(2);
3529 Oid roleid;
3530 Oid languageoid;
3531 AclMode mode;
3532 AclResult aclresult;
3533
3534 roleid = get_role_oid_or_public(NameStr(*username));
3535 languageoid = convert_language_name(languagename);
3536 mode = convert_language_priv_string(priv_type_text);
3537
3538 aclresult = pg_language_aclcheck(languageoid, roleid, mode);
3539
3540 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3541}
3542
3543/*
3544 * has_language_privilege_name
3545 * Check user privileges on a language given
3546 * text languagename and text priv name.
3547 * current_user is assumed
3548 */
3549Datum
3550has_language_privilege_name(PG_FUNCTION_ARGS)
3551{
3552 text *languagename = PG_GETARG_TEXT_PP(0);
3553 text *priv_type_text = PG_GETARG_TEXT_PP(1);
3554 Oid roleid;
3555 Oid languageoid;
3556 AclMode mode;
3557 AclResult aclresult;
3558
3559 roleid = GetUserId();
3560 languageoid = convert_language_name(languagename);
3561 mode = convert_language_priv_string(priv_type_text);
3562
3563 aclresult = pg_language_aclcheck(languageoid, roleid, mode);
3564
3565 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3566}
3567
3568/*
3569 * has_language_privilege_name_id
3570 * Check user privileges on a language given
3571 * name usename, language oid, and text priv name.
3572 */
3573Datum
3574has_language_privilege_name_id(PG_FUNCTION_ARGS)
3575{
3576 Name username = PG_GETARG_NAME(0);
3577 Oid languageoid = PG_GETARG_OID(1);
3578 text *priv_type_text = PG_GETARG_TEXT_PP(2);
3579 Oid roleid;
3580 AclMode mode;
3581 AclResult aclresult;
3582
3583 roleid = get_role_oid_or_public(NameStr(*username));
3584 mode = convert_language_priv_string(priv_type_text);
3585
3586 if (!SearchSysCacheExists1(LANGOID, ObjectIdGetDatum(languageoid)))
3587 PG_RETURN_NULL();
3588
3589 aclresult = pg_language_aclcheck(languageoid, roleid, mode);
3590
3591 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3592}
3593
3594/*
3595 * has_language_privilege_id
3596 * Check user privileges on a language given
3597 * language oid, and text priv name.
3598 * current_user is assumed
3599 */
3600Datum
3601has_language_privilege_id(PG_FUNCTION_ARGS)
3602{
3603 Oid languageoid = PG_GETARG_OID(0);
3604 text *priv_type_text = PG_GETARG_TEXT_PP(1);
3605 Oid roleid;
3606 AclMode mode;
3607 AclResult aclresult;
3608
3609 roleid = GetUserId();
3610 mode = convert_language_priv_string(priv_type_text);
3611
3612 if (!SearchSysCacheExists1(LANGOID, ObjectIdGetDatum(languageoid)))
3613 PG_RETURN_NULL();
3614
3615 aclresult = pg_language_aclcheck(languageoid, roleid, mode);
3616
3617 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3618}
3619
3620/*
3621 * has_language_privilege_id_name
3622 * Check user privileges on a language given
3623 * roleid, text languagename, and text priv name.
3624 */
3625Datum
3626has_language_privilege_id_name(PG_FUNCTION_ARGS)
3627{
3628 Oid roleid = PG_GETARG_OID(0);
3629 text *languagename = PG_GETARG_TEXT_PP(1);
3630 text *priv_type_text = PG_GETARG_TEXT_PP(2);
3631 Oid languageoid;
3632 AclMode mode;
3633 AclResult aclresult;
3634
3635 languageoid = convert_language_name(languagename);
3636 mode = convert_language_priv_string(priv_type_text);
3637
3638 aclresult = pg_language_aclcheck(languageoid, roleid, mode);
3639
3640 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3641}
3642
3643/*
3644 * has_language_privilege_id_id
3645 * Check user privileges on a language given
3646 * roleid, language oid, and text priv name.
3647 */
3648Datum
3649has_language_privilege_id_id(PG_FUNCTION_ARGS)
3650{
3651 Oid roleid = PG_GETARG_OID(0);
3652 Oid languageoid = PG_GETARG_OID(1);
3653 text *priv_type_text = PG_GETARG_TEXT_PP(2);
3654 AclMode mode;
3655 AclResult aclresult;
3656
3657 mode = convert_language_priv_string(priv_type_text);
3658
3659 if (!SearchSysCacheExists1(LANGOID, ObjectIdGetDatum(languageoid)))
3660 PG_RETURN_NULL();
3661
3662 aclresult = pg_language_aclcheck(languageoid, roleid, mode);
3663
3664 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3665}
3666
3667/*
3668 * Support routines for has_language_privilege family.
3669 */
3670
3671/*
3672 * Given a language name expressed as a string, look it up and return Oid
3673 */
3674static Oid
3675convert_language_name(text *languagename)
3676{
3677 char *langname = text_to_cstring(languagename);
3678
3679 return get_language_oid(langname, false);
3680}
3681
3682/*
3683 * convert_language_priv_string
3684 * Convert text string to AclMode value.
3685 */
3686static AclMode
3687convert_language_priv_string(text *priv_type_text)
3688{
3689 static const priv_map language_priv_map[] = {
3690 {"USAGE", ACL_USAGE},
3691 {"USAGE WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_USAGE)},
3692 {NULL, 0}
3693 };
3694
3695 return convert_any_priv_string(priv_type_text, language_priv_map);
3696}
3697
3698
3699/*
3700 * has_schema_privilege variants
3701 * These are all named "has_schema_privilege" at the SQL level.
3702 * They take various combinations of schema name, schema OID,
3703 * user name, user OID, or implicit user = current_user.
3704 *
3705 * The result is a boolean value: true if user has the indicated
3706 * privilege, false if not, or NULL if object doesn't exist.
3707 */
3708
3709/*
3710 * has_schema_privilege_name_name
3711 * Check user privileges on a schema given
3712 * name username, text schemaname, and text priv name.
3713 */
3714Datum
3715has_schema_privilege_name_name(PG_FUNCTION_ARGS)
3716{
3717 Name username = PG_GETARG_NAME(0);
3718 text *schemaname = PG_GETARG_TEXT_PP(1);
3719 text *priv_type_text = PG_GETARG_TEXT_PP(2);
3720 Oid roleid;
3721 Oid schemaoid;
3722 AclMode mode;
3723 AclResult aclresult;
3724
3725 roleid = get_role_oid_or_public(NameStr(*username));
3726 schemaoid = convert_schema_name(schemaname);
3727 mode = convert_schema_priv_string(priv_type_text);
3728
3729 aclresult = pg_namespace_aclcheck(schemaoid, roleid, mode);
3730
3731 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3732}
3733
3734/*
3735 * has_schema_privilege_name
3736 * Check user privileges on a schema given
3737 * text schemaname and text priv name.
3738 * current_user is assumed
3739 */
3740Datum
3741has_schema_privilege_name(PG_FUNCTION_ARGS)
3742{
3743 text *schemaname = PG_GETARG_TEXT_PP(0);
3744 text *priv_type_text = PG_GETARG_TEXT_PP(1);
3745 Oid roleid;
3746 Oid schemaoid;
3747 AclMode mode;
3748 AclResult aclresult;
3749
3750 roleid = GetUserId();
3751 schemaoid = convert_schema_name(schemaname);
3752 mode = convert_schema_priv_string(priv_type_text);
3753
3754 aclresult = pg_namespace_aclcheck(schemaoid, roleid, mode);
3755
3756 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3757}
3758
3759/*
3760 * has_schema_privilege_name_id
3761 * Check user privileges on a schema given
3762 * name usename, schema oid, and text priv name.
3763 */
3764Datum
3765has_schema_privilege_name_id(PG_FUNCTION_ARGS)
3766{
3767 Name username = PG_GETARG_NAME(0);
3768 Oid schemaoid = PG_GETARG_OID(1);
3769 text *priv_type_text = PG_GETARG_TEXT_PP(2);
3770 Oid roleid;
3771 AclMode mode;
3772 AclResult aclresult;
3773
3774 roleid = get_role_oid_or_public(NameStr(*username));
3775 mode = convert_schema_priv_string(priv_type_text);
3776
3777 if (!SearchSysCacheExists1(NAMESPACEOID, ObjectIdGetDatum(schemaoid)))
3778 PG_RETURN_NULL();
3779
3780 aclresult = pg_namespace_aclcheck(schemaoid, roleid, mode);
3781
3782 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3783}
3784
3785/*
3786 * has_schema_privilege_id
3787 * Check user privileges on a schema given
3788 * schema oid, and text priv name.
3789 * current_user is assumed
3790 */
3791Datum
3792has_schema_privilege_id(PG_FUNCTION_ARGS)
3793{
3794 Oid schemaoid = PG_GETARG_OID(0);
3795 text *priv_type_text = PG_GETARG_TEXT_PP(1);
3796 Oid roleid;
3797 AclMode mode;
3798 AclResult aclresult;
3799
3800 roleid = GetUserId();
3801 mode = convert_schema_priv_string(priv_type_text);
3802
3803 if (!SearchSysCacheExists1(NAMESPACEOID, ObjectIdGetDatum(schemaoid)))
3804 PG_RETURN_NULL();
3805
3806 aclresult = pg_namespace_aclcheck(schemaoid, roleid, mode);
3807
3808 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3809}
3810
3811/*
3812 * has_schema_privilege_id_name
3813 * Check user privileges on a schema given
3814 * roleid, text schemaname, and text priv name.
3815 */
3816Datum
3817has_schema_privilege_id_name(PG_FUNCTION_ARGS)
3818{
3819 Oid roleid = PG_GETARG_OID(0);
3820 text *schemaname = PG_GETARG_TEXT_PP(1);
3821 text *priv_type_text = PG_GETARG_TEXT_PP(2);
3822 Oid schemaoid;
3823 AclMode mode;
3824 AclResult aclresult;
3825
3826 schemaoid = convert_schema_name(schemaname);
3827 mode = convert_schema_priv_string(priv_type_text);
3828
3829 aclresult = pg_namespace_aclcheck(schemaoid, roleid, mode);
3830
3831 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3832}
3833
3834/*
3835 * has_schema_privilege_id_id
3836 * Check user privileges on a schema given
3837 * roleid, schema oid, and text priv name.
3838 */
3839Datum
3840has_schema_privilege_id_id(PG_FUNCTION_ARGS)
3841{
3842 Oid roleid = PG_GETARG_OID(0);
3843 Oid schemaoid = PG_GETARG_OID(1);
3844 text *priv_type_text = PG_GETARG_TEXT_PP(2);
3845 AclMode mode;
3846 AclResult aclresult;
3847
3848 mode = convert_schema_priv_string(priv_type_text);
3849
3850 if (!SearchSysCacheExists1(NAMESPACEOID, ObjectIdGetDatum(schemaoid)))
3851 PG_RETURN_NULL();
3852
3853 aclresult = pg_namespace_aclcheck(schemaoid, roleid, mode);
3854
3855 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3856}
3857
3858/*
3859 * Support routines for has_schema_privilege family.
3860 */
3861
3862/*
3863 * Given a schema name expressed as a string, look it up and return Oid
3864 */
3865static Oid
3866convert_schema_name(text *schemaname)
3867{
3868 char *nspname = text_to_cstring(schemaname);
3869
3870 return get_namespace_oid(nspname, false);
3871}
3872
3873/*
3874 * convert_schema_priv_string
3875 * Convert text string to AclMode value.
3876 */
3877static AclMode
3878convert_schema_priv_string(text *priv_type_text)
3879{
3880 static const priv_map schema_priv_map[] = {
3881 {"CREATE", ACL_CREATE},
3882 {"CREATE WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_CREATE)},
3883 {"USAGE", ACL_USAGE},
3884 {"USAGE WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_USAGE)},
3885 {NULL, 0}
3886 };
3887
3888 return convert_any_priv_string(priv_type_text, schema_priv_map);
3889}
3890
3891
3892/*
3893 * has_server_privilege variants
3894 * These are all named "has_server_privilege" at the SQL level.
3895 * They take various combinations of foreign server name,
3896 * server OID, user name, user OID, or implicit user = current_user.
3897 *
3898 * The result is a boolean value: true if user has the indicated
3899 * privilege, false if not.
3900 */
3901
3902/*
3903 * has_server_privilege_name_name
3904 * Check user privileges on a foreign server given
3905 * name username, text servername, and text priv name.
3906 */
3907Datum
3908has_server_privilege_name_name(PG_FUNCTION_ARGS)
3909{
3910 Name username = PG_GETARG_NAME(0);
3911 text *servername = PG_GETARG_TEXT_PP(1);
3912 text *priv_type_text = PG_GETARG_TEXT_PP(2);
3913 Oid roleid;
3914 Oid serverid;
3915 AclMode mode;
3916 AclResult aclresult;
3917
3918 roleid = get_role_oid_or_public(NameStr(*username));
3919 serverid = convert_server_name(servername);
3920 mode = convert_server_priv_string(priv_type_text);
3921
3922 aclresult = pg_foreign_server_aclcheck(serverid, roleid, mode);
3923
3924 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3925}
3926
3927/*
3928 * has_server_privilege_name
3929 * Check user privileges on a foreign server given
3930 * text servername and text priv name.
3931 * current_user is assumed
3932 */
3933Datum
3934has_server_privilege_name(PG_FUNCTION_ARGS)
3935{
3936 text *servername = PG_GETARG_TEXT_PP(0);
3937 text *priv_type_text = PG_GETARG_TEXT_PP(1);
3938 Oid roleid;
3939 Oid serverid;
3940 AclMode mode;
3941 AclResult aclresult;
3942
3943 roleid = GetUserId();
3944 serverid = convert_server_name(servername);
3945 mode = convert_server_priv_string(priv_type_text);
3946
3947 aclresult = pg_foreign_server_aclcheck(serverid, roleid, mode);
3948
3949 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3950}
3951
3952/*
3953 * has_server_privilege_name_id
3954 * Check user privileges on a foreign server given
3955 * name usename, foreign server oid, and text priv name.
3956 */
3957Datum
3958has_server_privilege_name_id(PG_FUNCTION_ARGS)
3959{
3960 Name username = PG_GETARG_NAME(0);
3961 Oid serverid = PG_GETARG_OID(1);
3962 text *priv_type_text = PG_GETARG_TEXT_PP(2);
3963 Oid roleid;
3964 AclMode mode;
3965 AclResult aclresult;
3966
3967 roleid = get_role_oid_or_public(NameStr(*username));
3968 mode = convert_server_priv_string(priv_type_text);
3969
3970 if (!SearchSysCacheExists1(FOREIGNSERVEROID, ObjectIdGetDatum(serverid)))
3971 PG_RETURN_NULL();
3972
3973 aclresult = pg_foreign_server_aclcheck(serverid, roleid, mode);
3974
3975 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
3976}
3977
3978/*
3979 * has_server_privilege_id
3980 * Check user privileges on a foreign server given
3981 * server oid, and text priv name.
3982 * current_user is assumed
3983 */
3984Datum
3985has_server_privilege_id(PG_FUNCTION_ARGS)
3986{
3987 Oid serverid = PG_GETARG_OID(0);
3988 text *priv_type_text = PG_GETARG_TEXT_PP(1);
3989 Oid roleid;
3990 AclMode mode;
3991 AclResult aclresult;
3992
3993 roleid = GetUserId();
3994 mode = convert_server_priv_string(priv_type_text);
3995
3996 if (!SearchSysCacheExists1(FOREIGNSERVEROID, ObjectIdGetDatum(serverid)))
3997 PG_RETURN_NULL();
3998
3999 aclresult = pg_foreign_server_aclcheck(serverid, roleid, mode);
4000
4001 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
4002}
4003
4004/*
4005 * has_server_privilege_id_name
4006 * Check user privileges on a foreign server given
4007 * roleid, text servername, and text priv name.
4008 */
4009Datum
4010has_server_privilege_id_name(PG_FUNCTION_ARGS)
4011{
4012 Oid roleid = PG_GETARG_OID(0);
4013 text *servername = PG_GETARG_TEXT_PP(1);
4014 text *priv_type_text = PG_GETARG_TEXT_PP(2);
4015 Oid serverid;
4016 AclMode mode;
4017 AclResult aclresult;
4018
4019 serverid = convert_server_name(servername);
4020 mode = convert_server_priv_string(priv_type_text);
4021
4022 aclresult = pg_foreign_server_aclcheck(serverid, roleid, mode);
4023
4024 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
4025}
4026
4027/*
4028 * has_server_privilege_id_id
4029 * Check user privileges on a foreign server given
4030 * roleid, server oid, and text priv name.
4031 */
4032Datum
4033has_server_privilege_id_id(PG_FUNCTION_ARGS)
4034{
4035 Oid roleid = PG_GETARG_OID(0);
4036 Oid serverid = PG_GETARG_OID(1);
4037 text *priv_type_text = PG_GETARG_TEXT_PP(2);
4038 AclMode mode;
4039 AclResult aclresult;
4040
4041 mode = convert_server_priv_string(priv_type_text);
4042
4043 if (!SearchSysCacheExists1(FOREIGNSERVEROID, ObjectIdGetDatum(serverid)))
4044 PG_RETURN_NULL();
4045
4046 aclresult = pg_foreign_server_aclcheck(serverid, roleid, mode);
4047
4048 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
4049}
4050
4051/*
4052 * Support routines for has_server_privilege family.
4053 */
4054
4055/*
4056 * Given a server name expressed as a string, look it up and return Oid
4057 */
4058static Oid
4059convert_server_name(text *servername)
4060{
4061 char *serverstr = text_to_cstring(servername);
4062
4063 return get_foreign_server_oid(serverstr, false);
4064}
4065
4066/*
4067 * convert_server_priv_string
4068 * Convert text string to AclMode value.
4069 */
4070static AclMode
4071convert_server_priv_string(text *priv_type_text)
4072{
4073 static const priv_map server_priv_map[] = {
4074 {"USAGE", ACL_USAGE},
4075 {"USAGE WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_USAGE)},
4076 {NULL, 0}
4077 };
4078
4079 return convert_any_priv_string(priv_type_text, server_priv_map);
4080}
4081
4082
4083/*
4084 * has_tablespace_privilege variants
4085 * These are all named "has_tablespace_privilege" at the SQL level.
4086 * They take various combinations of tablespace name, tablespace OID,
4087 * user name, user OID, or implicit user = current_user.
4088 *
4089 * The result is a boolean value: true if user has the indicated
4090 * privilege, false if not.
4091 */
4092
4093/*
4094 * has_tablespace_privilege_name_name
4095 * Check user privileges on a tablespace given
4096 * name username, text tablespacename, and text priv name.
4097 */
4098Datum
4099has_tablespace_privilege_name_name(PG_FUNCTION_ARGS)
4100{
4101 Name username = PG_GETARG_NAME(0);
4102 text *tablespacename = PG_GETARG_TEXT_PP(1);
4103 text *priv_type_text = PG_GETARG_TEXT_PP(2);
4104 Oid roleid;
4105 Oid tablespaceoid;
4106 AclMode mode;
4107 AclResult aclresult;
4108
4109 roleid = get_role_oid_or_public(NameStr(*username));
4110 tablespaceoid = convert_tablespace_name(tablespacename);
4111 mode = convert_tablespace_priv_string(priv_type_text);
4112
4113 aclresult = pg_tablespace_aclcheck(tablespaceoid, roleid, mode);
4114
4115 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
4116}
4117
4118/*
4119 * has_tablespace_privilege_name
4120 * Check user privileges on a tablespace given
4121 * text tablespacename and text priv name.
4122 * current_user is assumed
4123 */
4124Datum
4125has_tablespace_privilege_name(PG_FUNCTION_ARGS)
4126{
4127 text *tablespacename = PG_GETARG_TEXT_PP(0);
4128 text *priv_type_text = PG_GETARG_TEXT_PP(1);
4129 Oid roleid;
4130 Oid tablespaceoid;
4131 AclMode mode;
4132 AclResult aclresult;
4133
4134 roleid = GetUserId();
4135 tablespaceoid = convert_tablespace_name(tablespacename);
4136 mode = convert_tablespace_priv_string(priv_type_text);
4137
4138 aclresult = pg_tablespace_aclcheck(tablespaceoid, roleid, mode);
4139
4140 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
4141}
4142
4143/*
4144 * has_tablespace_privilege_name_id
4145 * Check user privileges on a tablespace given
4146 * name usename, tablespace oid, and text priv name.
4147 */
4148Datum
4149has_tablespace_privilege_name_id(PG_FUNCTION_ARGS)
4150{
4151 Name username = PG_GETARG_NAME(0);
4152 Oid tablespaceoid = PG_GETARG_OID(1);
4153 text *priv_type_text = PG_GETARG_TEXT_PP(2);
4154 Oid roleid;
4155 AclMode mode;
4156 AclResult aclresult;
4157
4158 roleid = get_role_oid_or_public(NameStr(*username));
4159 mode = convert_tablespace_priv_string(priv_type_text);
4160
4161 if (!SearchSysCacheExists1(TABLESPACEOID, ObjectIdGetDatum(tablespaceoid)))
4162 PG_RETURN_NULL();
4163
4164 aclresult = pg_tablespace_aclcheck(tablespaceoid, roleid, mode);
4165
4166 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
4167}
4168
4169/*
4170 * has_tablespace_privilege_id
4171 * Check user privileges on a tablespace given
4172 * tablespace oid, and text priv name.
4173 * current_user is assumed
4174 */
4175Datum
4176has_tablespace_privilege_id(PG_FUNCTION_ARGS)
4177{
4178 Oid tablespaceoid = PG_GETARG_OID(0);
4179 text *priv_type_text = PG_GETARG_TEXT_PP(1);
4180 Oid roleid;
4181 AclMode mode;
4182 AclResult aclresult;
4183
4184 roleid = GetUserId();
4185 mode = convert_tablespace_priv_string(priv_type_text);
4186
4187 if (!SearchSysCacheExists1(TABLESPACEOID, ObjectIdGetDatum(tablespaceoid)))
4188 PG_RETURN_NULL();
4189
4190 aclresult = pg_tablespace_aclcheck(tablespaceoid, roleid, mode);
4191
4192 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
4193}
4194
4195/*
4196 * has_tablespace_privilege_id_name
4197 * Check user privileges on a tablespace given
4198 * roleid, text tablespacename, and text priv name.
4199 */
4200Datum
4201has_tablespace_privilege_id_name(PG_FUNCTION_ARGS)
4202{
4203 Oid roleid = PG_GETARG_OID(0);
4204 text *tablespacename = PG_GETARG_TEXT_PP(1);
4205 text *priv_type_text = PG_GETARG_TEXT_PP(2);
4206 Oid tablespaceoid;
4207 AclMode mode;
4208 AclResult aclresult;
4209
4210 tablespaceoid = convert_tablespace_name(tablespacename);
4211 mode = convert_tablespace_priv_string(priv_type_text);
4212
4213 aclresult = pg_tablespace_aclcheck(tablespaceoid, roleid, mode);
4214
4215 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
4216}
4217
4218/*
4219 * has_tablespace_privilege_id_id
4220 * Check user privileges on a tablespace given
4221 * roleid, tablespace oid, and text priv name.
4222 */
4223Datum
4224has_tablespace_privilege_id_id(PG_FUNCTION_ARGS)
4225{
4226 Oid roleid = PG_GETARG_OID(0);
4227 Oid tablespaceoid = PG_GETARG_OID(1);
4228 text *priv_type_text = PG_GETARG_TEXT_PP(2);
4229 AclMode mode;
4230 AclResult aclresult;
4231
4232 mode = convert_tablespace_priv_string(priv_type_text);
4233
4234 if (!SearchSysCacheExists1(TABLESPACEOID, ObjectIdGetDatum(tablespaceoid)))
4235 PG_RETURN_NULL();
4236
4237 aclresult = pg_tablespace_aclcheck(tablespaceoid, roleid, mode);
4238
4239 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
4240}
4241
4242/*
4243 * Support routines for has_tablespace_privilege family.
4244 */
4245
4246/*
4247 * Given a tablespace name expressed as a string, look it up and return Oid
4248 */
4249static Oid
4250convert_tablespace_name(text *tablespacename)
4251{
4252 char *spcname = text_to_cstring(tablespacename);
4253
4254 return get_tablespace_oid(spcname, false);
4255}
4256
4257/*
4258 * convert_tablespace_priv_string
4259 * Convert text string to AclMode value.
4260 */
4261static AclMode
4262convert_tablespace_priv_string(text *priv_type_text)
4263{
4264 static const priv_map tablespace_priv_map[] = {
4265 {"CREATE", ACL_CREATE},
4266 {"CREATE WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_CREATE)},
4267 {NULL, 0}
4268 };
4269
4270 return convert_any_priv_string(priv_type_text, tablespace_priv_map);
4271}
4272
4273/*
4274 * has_type_privilege variants
4275 * These are all named "has_type_privilege" at the SQL level.
4276 * They take various combinations of type name, type OID,
4277 * user name, user OID, or implicit user = current_user.
4278 *
4279 * The result is a boolean value: true if user has the indicated
4280 * privilege, false if not, or NULL if object doesn't exist.
4281 */
4282
4283/*
4284 * has_type_privilege_name_name
4285 * Check user privileges on a type given
4286 * name username, text typename, and text priv name.
4287 */
4288Datum
4289has_type_privilege_name_name(PG_FUNCTION_ARGS)
4290{
4291 Name username = PG_GETARG_NAME(0);
4292 text *typename = PG_GETARG_TEXT_PP(1);
4293 text *priv_type_text = PG_GETARG_TEXT_PP(2);
4294 Oid roleid;
4295 Oid typeoid;
4296 AclMode mode;
4297 AclResult aclresult;
4298
4299 roleid = get_role_oid_or_public(NameStr(*username));
4300 typeoid = convert_type_name(typename);
4301 mode = convert_type_priv_string(priv_type_text);
4302
4303 aclresult = pg_type_aclcheck(typeoid, roleid, mode);
4304
4305 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
4306}
4307
4308/*
4309 * has_type_privilege_name
4310 * Check user privileges on a type given
4311 * text typename and text priv name.
4312 * current_user is assumed
4313 */
4314Datum
4315has_type_privilege_name(PG_FUNCTION_ARGS)
4316{
4317 text *typename = PG_GETARG_TEXT_PP(0);
4318 text *priv_type_text = PG_GETARG_TEXT_PP(1);
4319 Oid roleid;
4320 Oid typeoid;
4321 AclMode mode;
4322 AclResult aclresult;
4323
4324 roleid = GetUserId();
4325 typeoid = convert_type_name(typename);
4326 mode = convert_type_priv_string(priv_type_text);
4327
4328 aclresult = pg_type_aclcheck(typeoid, roleid, mode);
4329
4330 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
4331}
4332
4333/*
4334 * has_type_privilege_name_id
4335 * Check user privileges on a type given
4336 * name usename, type oid, and text priv name.
4337 */
4338Datum
4339has_type_privilege_name_id(PG_FUNCTION_ARGS)
4340{
4341 Name username = PG_GETARG_NAME(0);
4342 Oid typeoid = PG_GETARG_OID(1);
4343 text *priv_type_text = PG_GETARG_TEXT_PP(2);
4344 Oid roleid;
4345 AclMode mode;
4346 AclResult aclresult;
4347
4348 roleid = get_role_oid_or_public(NameStr(*username));
4349 mode = convert_type_priv_string(priv_type_text);
4350
4351 if (!SearchSysCacheExists1(TYPEOID, ObjectIdGetDatum(typeoid)))
4352 PG_RETURN_NULL();
4353
4354 aclresult = pg_type_aclcheck(typeoid, roleid, mode);
4355
4356 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
4357}
4358
4359/*
4360 * has_type_privilege_id
4361 * Check user privileges on a type given
4362 * type oid, and text priv name.
4363 * current_user is assumed
4364 */
4365Datum
4366has_type_privilege_id(PG_FUNCTION_ARGS)
4367{
4368 Oid typeoid = PG_GETARG_OID(0);
4369 text *priv_type_text = PG_GETARG_TEXT_PP(1);
4370 Oid roleid;
4371 AclMode mode;
4372 AclResult aclresult;
4373
4374 roleid = GetUserId();
4375 mode = convert_type_priv_string(priv_type_text);
4376
4377 if (!SearchSysCacheExists1(TYPEOID, ObjectIdGetDatum(typeoid)))
4378 PG_RETURN_NULL();
4379
4380 aclresult = pg_type_aclcheck(typeoid, roleid, mode);
4381
4382 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
4383}
4384
4385/*
4386 * has_type_privilege_id_name
4387 * Check user privileges on a type given
4388 * roleid, text typename, and text priv name.
4389 */
4390Datum
4391has_type_privilege_id_name(PG_FUNCTION_ARGS)
4392{
4393 Oid roleid = PG_GETARG_OID(0);
4394 text *typename = PG_GETARG_TEXT_PP(1);
4395 text *priv_type_text = PG_GETARG_TEXT_PP(2);
4396 Oid typeoid;
4397 AclMode mode;
4398 AclResult aclresult;
4399
4400 typeoid = convert_type_name(typename);
4401 mode = convert_type_priv_string(priv_type_text);
4402
4403 aclresult = pg_type_aclcheck(typeoid, roleid, mode);
4404
4405 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
4406}
4407
4408/*
4409 * has_type_privilege_id_id
4410 * Check user privileges on a type given
4411 * roleid, type oid, and text priv name.
4412 */
4413Datum
4414has_type_privilege_id_id(PG_FUNCTION_ARGS)
4415{
4416 Oid roleid = PG_GETARG_OID(0);
4417 Oid typeoid = PG_GETARG_OID(1);
4418 text *priv_type_text = PG_GETARG_TEXT_PP(2);
4419 AclMode mode;
4420 AclResult aclresult;
4421
4422 mode = convert_type_priv_string(priv_type_text);
4423
4424 if (!SearchSysCacheExists1(TYPEOID, ObjectIdGetDatum(typeoid)))
4425 PG_RETURN_NULL();
4426
4427 aclresult = pg_type_aclcheck(typeoid, roleid, mode);
4428
4429 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
4430}
4431
4432/*
4433 * Support routines for has_type_privilege family.
4434 */
4435
4436/*
4437 * Given a type name expressed as a string, look it up and return Oid
4438 */
4439static Oid
4440convert_type_name(text *typename)
4441{
4442 char *typname = text_to_cstring(typename);
4443 Oid oid;
4444
4445 oid = DatumGetObjectId(DirectFunctionCall1(regtypein,
4446 CStringGetDatum(typname)));
4447
4448 if (!OidIsValid(oid))
4449 ereport(ERROR,
4450 (errcode(ERRCODE_UNDEFINED_OBJECT),
4451 errmsg("type \"%s\" does not exist", typname)));
4452
4453 return oid;
4454}
4455
4456/*
4457 * convert_type_priv_string
4458 * Convert text string to AclMode value.
4459 */
4460static AclMode
4461convert_type_priv_string(text *priv_type_text)
4462{
4463 static const priv_map type_priv_map[] = {
4464 {"USAGE", ACL_USAGE},
4465 {"USAGE WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_USAGE)},
4466 {NULL, 0}
4467 };
4468
4469 return convert_any_priv_string(priv_type_text, type_priv_map);
4470}
4471
4472
4473/*
4474 * pg_has_role variants
4475 * These are all named "pg_has_role" at the SQL level.
4476 * They take various combinations of role name, role OID,
4477 * user name, user OID, or implicit user = current_user.
4478 *
4479 * The result is a boolean value: true if user has the indicated
4480 * privilege, false if not.
4481 */
4482
4483/*
4484 * pg_has_role_name_name
4485 * Check user privileges on a role given
4486 * name username, name rolename, and text priv name.
4487 */
4488Datum
4489pg_has_role_name_name(PG_FUNCTION_ARGS)
4490{
4491 Name username = PG_GETARG_NAME(0);
4492 Name rolename = PG_GETARG_NAME(1);
4493 text *priv_type_text = PG_GETARG_TEXT_PP(2);
4494 Oid roleid;
4495 Oid roleoid;
4496 AclMode mode;
4497 AclResult aclresult;
4498
4499 roleid = get_role_oid(NameStr(*username), false);
4500 roleoid = get_role_oid(NameStr(*rolename), false);
4501 mode = convert_role_priv_string(priv_type_text);
4502
4503 aclresult = pg_role_aclcheck(roleoid, roleid, mode);
4504
4505 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
4506}
4507
4508/*
4509 * pg_has_role_name
4510 * Check user privileges on a role given
4511 * name rolename and text priv name.
4512 * current_user is assumed
4513 */
4514Datum
4515pg_has_role_name(PG_FUNCTION_ARGS)
4516{
4517 Name rolename = PG_GETARG_NAME(0);
4518 text *priv_type_text = PG_GETARG_TEXT_PP(1);
4519 Oid roleid;
4520 Oid roleoid;
4521 AclMode mode;
4522 AclResult aclresult;
4523
4524 roleid = GetUserId();
4525 roleoid = get_role_oid(NameStr(*rolename), false);
4526 mode = convert_role_priv_string(priv_type_text);
4527
4528 aclresult = pg_role_aclcheck(roleoid, roleid, mode);
4529
4530 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
4531}
4532
4533/*
4534 * pg_has_role_name_id
4535 * Check user privileges on a role given
4536 * name usename, role oid, and text priv name.
4537 */
4538Datum
4539pg_has_role_name_id(PG_FUNCTION_ARGS)
4540{
4541 Name username = PG_GETARG_NAME(0);
4542 Oid roleoid = PG_GETARG_OID(1);
4543 text *priv_type_text = PG_GETARG_TEXT_PP(2);
4544 Oid roleid;
4545 AclMode mode;
4546 AclResult aclresult;
4547
4548 roleid = get_role_oid(NameStr(*username), false);
4549 mode = convert_role_priv_string(priv_type_text);
4550
4551 aclresult = pg_role_aclcheck(roleoid, roleid, mode);
4552
4553 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
4554}
4555
4556/*
4557 * pg_has_role_id
4558 * Check user privileges on a role given
4559 * role oid, and text priv name.
4560 * current_user is assumed
4561 */
4562Datum
4563pg_has_role_id(PG_FUNCTION_ARGS)
4564{
4565 Oid roleoid = PG_GETARG_OID(0);
4566 text *priv_type_text = PG_GETARG_TEXT_PP(1);
4567 Oid roleid;
4568 AclMode mode;
4569 AclResult aclresult;
4570
4571 roleid = GetUserId();
4572 mode = convert_role_priv_string(priv_type_text);
4573
4574 aclresult = pg_role_aclcheck(roleoid, roleid, mode);
4575
4576 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
4577}
4578
4579/*
4580 * pg_has_role_id_name
4581 * Check user privileges on a role given
4582 * roleid, name rolename, and text priv name.
4583 */
4584Datum
4585pg_has_role_id_name(PG_FUNCTION_ARGS)
4586{
4587 Oid roleid = PG_GETARG_OID(0);
4588 Name rolename = PG_GETARG_NAME(1);
4589 text *priv_type_text = PG_GETARG_TEXT_PP(2);
4590 Oid roleoid;
4591 AclMode mode;
4592 AclResult aclresult;
4593
4594 roleoid = get_role_oid(NameStr(*rolename), false);
4595 mode = convert_role_priv_string(priv_type_text);
4596
4597 aclresult = pg_role_aclcheck(roleoid, roleid, mode);
4598
4599 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
4600}
4601
4602/*
4603 * pg_has_role_id_id
4604 * Check user privileges on a role given
4605 * roleid, role oid, and text priv name.
4606 */
4607Datum
4608pg_has_role_id_id(PG_FUNCTION_ARGS)
4609{
4610 Oid roleid = PG_GETARG_OID(0);
4611 Oid roleoid = PG_GETARG_OID(1);
4612 text *priv_type_text = PG_GETARG_TEXT_PP(2);
4613 AclMode mode;
4614 AclResult aclresult;
4615
4616 mode = convert_role_priv_string(priv_type_text);
4617
4618 aclresult = pg_role_aclcheck(roleoid, roleid, mode);
4619
4620 PG_RETURN_BOOL(aclresult == ACLCHECK_OK);
4621}
4622
4623/*
4624 * Support routines for pg_has_role family.
4625 */
4626
4627/*
4628 * convert_role_priv_string
4629 * Convert text string to AclMode value.
4630 *
4631 * We use USAGE to denote whether the privileges of the role are accessible
4632 * (has_privs), MEMBER to denote is_member, and MEMBER WITH GRANT OPTION
4633 * (or ADMIN OPTION) to denote is_admin. There is no ACL bit corresponding
4634 * to MEMBER so we cheat and use ACL_CREATE for that. This convention
4635 * is shared only with pg_role_aclcheck, below.
4636 */
4637static AclMode
4638convert_role_priv_string(text *priv_type_text)
4639{
4640 static const priv_map role_priv_map[] = {
4641 {"USAGE", ACL_USAGE},
4642 {"MEMBER", ACL_CREATE},
4643 {"USAGE WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_CREATE)},
4644 {"USAGE WITH ADMIN OPTION", ACL_GRANT_OPTION_FOR(ACL_CREATE)},
4645 {"MEMBER WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_CREATE)},
4646 {"MEMBER WITH ADMIN OPTION", ACL_GRANT_OPTION_FOR(ACL_CREATE)},
4647 {NULL, 0}
4648 };
4649
4650 return convert_any_priv_string(priv_type_text, role_priv_map);
4651}
4652
4653/*
4654 * pg_role_aclcheck
4655 * Quick-and-dirty support for pg_has_role
4656 */
4657static AclResult
4658pg_role_aclcheck(Oid role_oid, Oid roleid, AclMode mode)
4659{
4660 if (mode & ACL_GRANT_OPTION_FOR(ACL_CREATE))
4661 {
4662 /*
4663 * XXX For roleid == role_oid, is_admin_of_role() also examines the
4664 * session and call stack. That suits two-argument pg_has_role(), but
4665 * it gives the three-argument version a lamentable whimsy.
4666 */
4667 if (is_admin_of_role(roleid, role_oid))
4668 return ACLCHECK_OK;
4669 }
4670 if (mode & ACL_CREATE)
4671 {
4672 if (is_member_of_role(roleid, role_oid))
4673 return ACLCHECK_OK;
4674 }
4675 if (mode & ACL_USAGE)
4676 {
4677 if (has_privs_of_role(roleid, role_oid))
4678 return ACLCHECK_OK;
4679 }
4680 return ACLCHECK_NO_PRIV;
4681}
4682
4683
4684/*
4685 * initialization function (called by InitPostgres)
4686 */
4687void
4688initialize_acl(void)
4689{
4690 if (!IsBootstrapProcessingMode())
4691 {
4692 /*
4693 * In normal mode, set a callback on any syscache invalidation of
4694 * pg_auth_members rows
4695 */
4696 CacheRegisterSyscacheCallback(AUTHMEMROLEMEM,
4697 RoleMembershipCacheCallback,
4698 (Datum) 0);
4699 }
4700}
4701
4702/*
4703 * RoleMembershipCacheCallback
4704 * Syscache inval callback function
4705 */
4706static void
4707RoleMembershipCacheCallback(Datum arg, int cacheid, uint32 hashvalue)
4708{
4709 /* Force membership caches to be recomputed on next use */
4710 cached_privs_role = InvalidOid;
4711 cached_member_role = InvalidOid;
4712}
4713
4714
4715/* Check if specified role has rolinherit set */
4716static bool
4717has_rolinherit(Oid roleid)
4718{
4719 bool result = false;
4720 HeapTuple utup;
4721
4722 utup = SearchSysCache1(AUTHOID, ObjectIdGetDatum(roleid));
4723 if (HeapTupleIsValid(utup))
4724 {
4725 result = ((Form_pg_authid) GETSTRUCT(utup))->rolinherit;
4726 ReleaseSysCache(utup);
4727 }
4728 return result;
4729}
4730
4731
4732/*
4733 * Get a list of roles that the specified roleid has the privileges of
4734 *
4735 * This is defined not to recurse through roles that don't have rolinherit
4736 * set; for such roles, membership implies the ability to do SET ROLE, but
4737 * the privileges are not available until you've done so.
4738 *
4739 * Since indirect membership testing is relatively expensive, we cache
4740 * a list of memberships. Hence, the result is only guaranteed good until
4741 * the next call of roles_has_privs_of()!
4742 *
4743 * For the benefit of select_best_grantor, the result is defined to be
4744 * in breadth-first order, ie, closer relationships earlier.
4745 */
4746static List *
4747roles_has_privs_of(Oid roleid)
4748{
4749 List *roles_list;
4750 ListCell *l;
4751 List *new_cached_privs_roles;
4752 MemoryContext oldctx;
4753
4754 /* If cache is already valid, just return the list */
4755 if (OidIsValid(cached_privs_role) && cached_privs_role == roleid)
4756 return cached_privs_roles;
4757
4758 /*
4759 * Find all the roles that roleid is a member of, including multi-level
4760 * recursion. The role itself will always be the first element of the
4761 * resulting list.
4762 *
4763 * Each element of the list is scanned to see if it adds any indirect
4764 * memberships. We can use a single list as both the record of
4765 * already-found memberships and the agenda of roles yet to be scanned.
4766 * This is a bit tricky but works because the foreach() macro doesn't
4767 * fetch the next list element until the bottom of the loop.
4768 */
4769 roles_list = list_make1_oid(roleid);
4770
4771 foreach(l, roles_list)
4772 {
4773 Oid memberid = lfirst_oid(l);
4774 CatCList *memlist;
4775 int i;
4776
4777 /* Ignore non-inheriting roles */
4778 if (!has_rolinherit(memberid))
4779 continue;
4780
4781 /* Find roles that memberid is directly a member of */
4782 memlist = SearchSysCacheList1(AUTHMEMMEMROLE,
4783 ObjectIdGetDatum(memberid));
4784 for (i = 0; i < memlist->n_members; i++)
4785 {
4786 HeapTuple tup = &memlist->members[i]->tuple;
4787 Oid otherid = ((Form_pg_auth_members) GETSTRUCT(tup))->roleid;
4788
4789 /*
4790 * Even though there shouldn't be any loops in the membership
4791 * graph, we must test for having already seen this role. It is
4792 * legal for instance to have both A->B and A->C->B.
4793 */
4794 roles_list = list_append_unique_oid(roles_list, otherid);
4795 }
4796 ReleaseSysCacheList(memlist);
4797 }
4798
4799 /*
4800 * Copy the completed list into TopMemoryContext so it will persist.
4801 */
4802 oldctx = MemoryContextSwitchTo(TopMemoryContext);
4803 new_cached_privs_roles = list_copy(roles_list);
4804 MemoryContextSwitchTo(oldctx);
4805 list_free(roles_list);
4806
4807 /*
4808 * Now safe to assign to state variable
4809 */
4810 cached_privs_role = InvalidOid; /* just paranoia */
4811 list_free(cached_privs_roles);
4812 cached_privs_roles = new_cached_privs_roles;
4813 cached_privs_role = roleid;
4814
4815 /* And now we can return the answer */
4816 return cached_privs_roles;
4817}
4818
4819
4820/*
4821 * Get a list of roles that the specified roleid is a member of
4822 *
4823 * This is defined to recurse through roles regardless of rolinherit.
4824 *
4825 * Since indirect membership testing is relatively expensive, we cache
4826 * a list of memberships. Hence, the result is only guaranteed good until
4827 * the next call of roles_is_member_of()!
4828 */
4829static List *
4830roles_is_member_of(Oid roleid)
4831{
4832 List *roles_list;
4833 ListCell *l;
4834 List *new_cached_membership_roles;
4835 MemoryContext oldctx;
4836
4837 /* If cache is already valid, just return the list */
4838 if (OidIsValid(cached_member_role) && cached_member_role == roleid)
4839 return cached_membership_roles;
4840
4841 /*
4842 * Find all the roles that roleid is a member of, including multi-level
4843 * recursion. The role itself will always be the first element of the
4844 * resulting list.
4845 *
4846 * Each element of the list is scanned to see if it adds any indirect
4847 * memberships. We can use a single list as both the record of
4848 * already-found memberships and the agenda of roles yet to be scanned.
4849 * This is a bit tricky but works because the foreach() macro doesn't
4850 * fetch the next list element until the bottom of the loop.
4851 */
4852 roles_list = list_make1_oid(roleid);
4853
4854 foreach(l, roles_list)
4855 {
4856 Oid memberid = lfirst_oid(l);
4857 CatCList *memlist;
4858 int i;
4859
4860 /* Find roles that memberid is directly a member of */
4861 memlist = SearchSysCacheList1(AUTHMEMMEMROLE,
4862 ObjectIdGetDatum(memberid));
4863 for (i = 0; i < memlist->n_members; i++)
4864 {
4865 HeapTuple tup = &memlist->members[i]->tuple;
4866 Oid otherid = ((Form_pg_auth_members) GETSTRUCT(tup))->roleid;
4867
4868 /*
4869 * Even though there shouldn't be any loops in the membership
4870 * graph, we must test for having already seen this role. It is
4871 * legal for instance to have both A->B and A->C->B.
4872 */
4873 roles_list = list_append_unique_oid(roles_list, otherid);
4874 }
4875 ReleaseSysCacheList(memlist);
4876 }
4877
4878 /*
4879 * Copy the completed list into TopMemoryContext so it will persist.
4880 */
4881 oldctx = MemoryContextSwitchTo(TopMemoryContext);
4882 new_cached_membership_roles = list_copy(roles_list);
4883 MemoryContextSwitchTo(oldctx);
4884 list_free(roles_list);
4885
4886 /*
4887 * Now safe to assign to state variable
4888 */
4889 cached_member_role = InvalidOid; /* just paranoia */
4890 list_free(cached_membership_roles);
4891 cached_membership_roles = new_cached_membership_roles;
4892 cached_member_role = roleid;
4893
4894 /* And now we can return the answer */
4895 return cached_membership_roles;
4896}
4897
4898
4899/*
4900 * Does member have the privileges of role (directly or indirectly)?
4901 *
4902 * This is defined not to recurse through roles that don't have rolinherit
4903 * set; for such roles, membership implies the ability to do SET ROLE, but
4904 * the privileges are not available until you've done so.
4905 */
4906bool
4907has_privs_of_role(Oid member, Oid role)
4908{
4909 /* Fast path for simple case */
4910 if (member == role)
4911 return true;
4912
4913 /* Superusers have every privilege, so are part of every role */
4914 if (superuser_arg(member))
4915 return true;
4916
4917 /*
4918 * Find all the roles that member has the privileges of, including
4919 * multi-level recursion, then see if target role is any one of them.
4920 */
4921 return list_member_oid(roles_has_privs_of(member), role);
4922}
4923
4924
4925/*
4926 * Is member a member of role (directly or indirectly)?
4927 *
4928 * This is defined to recurse through roles regardless of rolinherit.
4929 */
4930bool
4931is_member_of_role(Oid member, Oid role)
4932{
4933 /* Fast path for simple case */
4934 if (member == role)
4935 return true;
4936
4937 /* Superusers have every privilege, so are part of every role */
4938 if (superuser_arg(member))
4939 return true;
4940
4941 /*
4942 * Find all the roles that member is a member of, including multi-level
4943 * recursion, then see if target role is any one of them.
4944 */
4945 return list_member_oid(roles_is_member_of(member), role);
4946}
4947
4948/*
4949 * check_is_member_of_role
4950 * is_member_of_role with a standard permission-violation error if not
4951 */
4952void
4953check_is_member_of_role(Oid member, Oid role)
4954{
4955 if (!is_member_of_role(member, role))
4956 ereport(ERROR,
4957 (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
4958 errmsg("must be member of role \"%s\"",
4959 GetUserNameFromId(role, false))));
4960}
4961
4962/*
4963 * Is member a member of role, not considering superuserness?
4964 *
4965 * This is identical to is_member_of_role except we ignore superuser
4966 * status.
4967 */
4968bool
4969is_member_of_role_nosuper(Oid member, Oid role)
4970{
4971 /* Fast path for simple case */
4972 if (member == role)
4973 return true;
4974
4975 /*
4976 * Find all the roles that member is a member of, including multi-level
4977 * recursion, then see if target role is any one of them.
4978 */
4979 return list_member_oid(roles_is_member_of(member), role);
4980}
4981
4982
4983/*
4984 * Is member an admin of role? That is, is member the role itself (subject to
4985 * restrictions below), a member (directly or indirectly) WITH ADMIN OPTION,
4986 * or a superuser?
4987 */
4988bool
4989is_admin_of_role(Oid member, Oid role)
4990{
4991 bool result = false;
4992 List *roles_list;
4993 ListCell *l;
4994
4995 if (superuser_arg(member))
4996 return true;
4997
4998 if (member == role)
4999
5000 /*
5001 * A role can admin itself when it matches the session user and we're
5002 * outside any security-restricted operation, SECURITY DEFINER or
5003 * similar context. SQL-standard roles cannot self-admin. However,
5004 * SQL-standard users are distinct from roles, and they are not
5005 * grantable like roles: PostgreSQL's role-user duality extends the
5006 * standard. Checking for a session user match has the effect of
5007 * letting a role self-admin only when it's conspicuously behaving
5008 * like a user. Note that allowing self-admin under a mere SET ROLE
5009 * would make WITH ADMIN OPTION largely irrelevant; any member could
5010 * SET ROLE to issue the otherwise-forbidden command.
5011 *
5012 * Withholding self-admin in a security-restricted operation prevents
5013 * object owners from harnessing the session user identity during
5014 * administrative maintenance. Suppose Alice owns a database, has
5015 * issued "GRANT alice TO bob", and runs a daily ANALYZE. Bob creates
5016 * an alice-owned SECURITY DEFINER function that issues "REVOKE alice
5017 * FROM carol". If he creates an expression index calling that
5018 * function, Alice will attempt the REVOKE during each ANALYZE.
5019 * Checking InSecurityRestrictedOperation() thwarts that attack.
5020 *
5021 * Withholding self-admin in SECURITY DEFINER functions makes their
5022 * behavior independent of the calling user. There's no security or
5023 * SQL-standard-conformance need for that restriction, though.
5024 *
5025 * A role cannot have actual WITH ADMIN OPTION on itself, because that
5026 * would imply a membership loop. Therefore, we're done either way.
5027 */
5028 return member == GetSessionUserId() &&
5029 !InLocalUserIdChange() && !InSecurityRestrictedOperation();
5030
5031 /*
5032 * Find all the roles that member is a member of, including multi-level
5033 * recursion. We build a list in the same way that is_member_of_role does
5034 * to track visited and unvisited roles.
5035 */
5036 roles_list = list_make1_oid(member);
5037
5038 foreach(l, roles_list)
5039 {
5040 Oid memberid = lfirst_oid(l);
5041 CatCList *memlist;
5042 int i;
5043
5044 /* Find roles that memberid is directly a member of */
5045 memlist = SearchSysCacheList1(AUTHMEMMEMROLE,
5046 ObjectIdGetDatum(memberid));
5047 for (i = 0; i < memlist->n_members; i++)
5048 {
5049 HeapTuple tup = &memlist->members[i]->tuple;
5050 Oid otherid = ((Form_pg_auth_members) GETSTRUCT(tup))->roleid;
5051
5052 if (otherid == role &&
5053 ((Form_pg_auth_members) GETSTRUCT(tup))->admin_option)
5054 {
5055 /* Found what we came for, so can stop searching */
5056 result = true;
5057 break;
5058 }
5059
5060 roles_list = list_append_unique_oid(roles_list, otherid);
5061 }
5062 ReleaseSysCacheList(memlist);
5063 if (result)
5064 break;
5065 }
5066
5067 list_free(roles_list);
5068
5069 return result;
5070}
5071
5072
5073/* does what it says ... */
5074static int
5075count_one_bits(AclMode mask)
5076{
5077 int nbits = 0;
5078
5079 /* this code relies on AclMode being an unsigned type */
5080 while (mask)
5081 {
5082 if (mask & 1)
5083 nbits++;
5084 mask >>= 1;
5085 }
5086 return nbits;
5087}
5088
5089
5090/*
5091 * Select the effective grantor ID for a GRANT or REVOKE operation.
5092 *
5093 * The grantor must always be either the object owner or some role that has
5094 * been explicitly granted grant options. This ensures that all granted
5095 * privileges appear to flow from the object owner, and there are never
5096 * multiple "original sources" of a privilege. Therefore, if the would-be
5097 * grantor is a member of a role that has the needed grant options, we have
5098 * to do the grant as that role instead.
5099 *
5100 * It is possible that the would-be grantor is a member of several roles
5101 * that have different subsets of the desired grant options, but no one
5102 * role has 'em all. In this case we pick a role with the largest number
5103 * of desired options. Ties are broken in favor of closer ancestors.
5104 *
5105 * roleId: the role attempting to do the GRANT/REVOKE
5106 * privileges: the privileges to be granted/revoked
5107 * acl: the ACL of the object in question
5108 * ownerId: the role owning the object in question
5109 * *grantorId: receives the OID of the role to do the grant as
5110 * *grantOptions: receives the grant options actually held by grantorId
5111 *
5112 * If no grant options exist, we set grantorId to roleId, grantOptions to 0.
5113 */
5114void
5115select_best_grantor(Oid roleId, AclMode privileges,
5116 const Acl *acl, Oid ownerId,
5117 Oid *grantorId, AclMode *grantOptions)
5118{
5119 AclMode needed_goptions = ACL_GRANT_OPTION_FOR(privileges);
5120 List *roles_list;
5121 int nrights;
5122 ListCell *l;
5123
5124 /*
5125 * The object owner is always treated as having all grant options, so if
5126 * roleId is the owner it's easy. Also, if roleId is a superuser it's
5127 * easy: superusers are implicitly members of every role, so they act as
5128 * the object owner.
5129 */
5130 if (roleId == ownerId || superuser_arg(roleId))
5131 {
5132 *grantorId = ownerId;
5133 *grantOptions = needed_goptions;
5134 return;
5135 }
5136
5137 /*
5138 * Otherwise we have to do a careful search to see if roleId has the
5139 * privileges of any suitable role. Note: we can hang onto the result of
5140 * roles_has_privs_of() throughout this loop, because aclmask_direct()
5141 * doesn't query any role memberships.
5142 */
5143 roles_list = roles_has_privs_of(roleId);
5144
5145 /* initialize candidate result as default */
5146 *grantorId = roleId;
5147 *grantOptions = ACL_NO_RIGHTS;
5148 nrights = 0;
5149
5150 foreach(l, roles_list)
5151 {
5152 Oid otherrole = lfirst_oid(l);
5153 AclMode otherprivs;
5154
5155 otherprivs = aclmask_direct(acl, otherrole, ownerId,
5156 needed_goptions, ACLMASK_ALL);
5157 if (otherprivs == needed_goptions)
5158 {
5159 /* Found a suitable grantor */
5160 *grantorId = otherrole;
5161 *grantOptions = otherprivs;
5162 return;
5163 }
5164
5165 /*
5166 * If it has just some of the needed privileges, remember best
5167 * candidate.
5168 */
5169 if (otherprivs != ACL_NO_RIGHTS)
5170 {
5171 int nnewrights = count_one_bits(otherprivs);
5172
5173 if (nnewrights > nrights)
5174 {
5175 *grantorId = otherrole;
5176 *grantOptions = otherprivs;
5177 nrights = nnewrights;
5178 }
5179 }
5180 }
5181}
5182
5183/*
5184 * get_role_oid - Given a role name, look up the role's OID.
5185 *
5186 * If missing_ok is false, throw an error if role name not found. If
5187 * true, just return InvalidOid.
5188 */
5189Oid
5190get_role_oid(const char *rolname, bool missing_ok)
5191{
5192 Oid oid;
5193
5194 oid = GetSysCacheOid1(AUTHNAME, Anum_pg_authid_oid,
5195 CStringGetDatum(rolname));
5196 if (!OidIsValid(oid) && !missing_ok)
5197 ereport(ERROR,
5198 (errcode(ERRCODE_UNDEFINED_OBJECT),
5199 errmsg("role \"%s\" does not exist", rolname)));
5200 return oid;
5201}
5202
5203/*
5204 * get_role_oid_or_public - As above, but return ACL_ID_PUBLIC if the
5205 * role name is "public".
5206 */
5207Oid
5208get_role_oid_or_public(const char *rolname)
5209{
5210 if (strcmp(rolname, "public") == 0)
5211 return ACL_ID_PUBLIC;
5212
5213 return get_role_oid(rolname, false);
5214}
5215
5216/*
5217 * Given a RoleSpec node, return the OID it corresponds to. If missing_ok is
5218 * true, return InvalidOid if the role does not exist.
5219 *
5220 * PUBLIC is always disallowed here. Routines wanting to handle the PUBLIC
5221 * case must check the case separately.
5222 */
5223Oid
5224get_rolespec_oid(const RoleSpec *role, bool missing_ok)
5225{
5226 Oid oid;
5227
5228 switch (role->roletype)
5229 {
5230 case ROLESPEC_CSTRING:
5231 Assert(role->rolename);
5232 oid = get_role_oid(role->rolename, missing_ok);
5233 break;
5234
5235 case ROLESPEC_CURRENT_USER:
5236 oid = GetUserId();
5237 break;
5238
5239 case ROLESPEC_SESSION_USER:
5240 oid = GetSessionUserId();
5241 break;
5242
5243 case ROLESPEC_PUBLIC:
5244 ereport(ERROR,
5245 (errcode(ERRCODE_UNDEFINED_OBJECT),
5246 errmsg("role \"%s\" does not exist", "public")));
5247 oid = InvalidOid; /* make compiler happy */
5248 break;
5249
5250 default:
5251 elog(ERROR, "unexpected role type %d", role->roletype);
5252 }
5253
5254 return oid;
5255}
5256
5257/*
5258 * Given a RoleSpec node, return the pg_authid HeapTuple it corresponds to.
5259 * Caller must ReleaseSysCache when done with the result tuple.
5260 */
5261HeapTuple
5262get_rolespec_tuple(const RoleSpec *role)
5263{
5264 HeapTuple tuple;
5265
5266 switch (role->roletype)
5267 {
5268 case ROLESPEC_CSTRING:
5269 Assert(role->rolename);
5270 tuple = SearchSysCache1(AUTHNAME, CStringGetDatum(role->rolename));
5271 if (!HeapTupleIsValid(tuple))
5272 ereport(ERROR,
5273 (errcode(ERRCODE_UNDEFINED_OBJECT),
5274 errmsg("role \"%s\" does not exist", role->rolename)));
5275 break;
5276
5277 case ROLESPEC_CURRENT_USER:
5278 tuple = SearchSysCache1(AUTHOID, GetUserId());
5279 if (!HeapTupleIsValid(tuple))
5280 elog(ERROR, "cache lookup failed for role %u", GetUserId());
5281 break;
5282
5283 case ROLESPEC_SESSION_USER:
5284 tuple = SearchSysCache1(AUTHOID, GetSessionUserId());
5285 if (!HeapTupleIsValid(tuple))
5286 elog(ERROR, "cache lookup failed for role %u", GetSessionUserId());
5287 break;
5288
5289 case ROLESPEC_PUBLIC:
5290 ereport(ERROR,
5291 (errcode(ERRCODE_UNDEFINED_OBJECT),
5292 errmsg("role \"%s\" does not exist", "public")));
5293 tuple = NULL; /* make compiler happy */
5294 break;
5295
5296 default:
5297 elog(ERROR, "unexpected role type %d", role->roletype);
5298 }
5299
5300 return tuple;
5301}
5302
5303/*
5304 * Given a RoleSpec, returns a palloc'ed copy of the corresponding role's name.
5305 */
5306char *
5307get_rolespec_name(const RoleSpec *role)
5308{
5309 HeapTuple tp;
5310 Form_pg_authid authForm;
5311 char *rolename;
5312
5313 tp = get_rolespec_tuple(role);
5314 authForm = (Form_pg_authid) GETSTRUCT(tp);
5315 rolename = pstrdup(NameStr(authForm->rolname));
5316 ReleaseSysCache(tp);
5317
5318 return rolename;
5319}
5320
5321/*
5322 * Given a RoleSpec, throw an error if the name is reserved, using detail_msg,
5323 * if provided.
5324 *
5325 * If node is NULL, no error is thrown. If detail_msg is NULL then no detail
5326 * message is provided.
5327 */
5328void
5329check_rolespec_name(const RoleSpec *role, const char *detail_msg)
5330{
5331 if (!role)
5332 return;
5333
5334 if (role->roletype != ROLESPEC_CSTRING)
5335 return;
5336
5337 if (IsReservedName(role->rolename))
5338 {
5339 if (detail_msg)
5340 ereport(ERROR,
5341 (errcode(ERRCODE_RESERVED_NAME),
5342 errmsg("role name \"%s\" is reserved",
5343 role->rolename),
5344 errdetail("%s", detail_msg)));
5345 else
5346 ereport(ERROR,
5347 (errcode(ERRCODE_RESERVED_NAME),
5348 errmsg("role name \"%s\" is reserved",
5349 role->rolename)));
5350 }
5351}
5352