/*------------------------------------------------------------------------- * * aclchk.c * Routines to check access control permissions. * * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * * IDENTIFICATION * $PostgreSQL: pgsql/src/backend/catalog/aclchk.c,v 1.169 2010/08/05 14:44:58 rhaas Exp $ * * NOTES * See acl.h. * *------------------------------------------------------------------------- */ #include "postgres.h" #include "access/genam.h" #include "access/heapam.h" #include "access/sysattr.h" #include "access/xact.h" #include "catalog/catalog.h" #include "catalog/dependency.h" #include "catalog/indexing.h" #include "catalog/pg_authid.h" #include "catalog/pg_conversion.h" #include "catalog/pg_database.h" #include "catalog/pg_default_acl.h" #include "catalog/pg_foreign_data_wrapper.h" #include "catalog/pg_foreign_server.h" #include "catalog/pg_language.h" #include "catalog/pg_largeobject.h" #include "catalog/pg_largeobject_metadata.h" #include "catalog/pg_namespace.h" #include "catalog/pg_opclass.h" #include "catalog/pg_operator.h" #include "catalog/pg_opfamily.h" #include "catalog/pg_proc.h" #include "catalog/pg_tablespace.h" #include "catalog/pg_type.h" #include "catalog/pg_ts_config.h" #include "catalog/pg_ts_dict.h" #include "commands/dbcommands.h" #include "commands/proclang.h" #include "commands/tablespace.h" #include "foreign/foreign.h" #include "miscadmin.h" #include "parser/parse_func.h" #include "utils/acl.h" #include "utils/builtins.h" #include "utils/fmgroids.h" #include "utils/lsyscache.h" #include "utils/rel.h" #include "utils/syscache.h" #include "utils/tqual.h" /* * The information about one Grant/Revoke statement, in internal format: object * and grantees names have been turned into Oids, the privilege list is an * AclMode bitmask. If 'privileges' is ACL_NO_RIGHTS (the 0 value) and * all_privs is true, 'privileges' will be internally set to the right kind of * ACL_ALL_RIGHTS_*, depending on the object type (NB - this will modify the * InternalGrant struct!) * * Note: 'all_privs' and 'privileges' represent object-level privileges only. * There might also be column-level privilege specifications, which are * represented in col_privs (this is a list of untransformed AccessPriv nodes). * Column privileges are only valid for objtype ACL_OBJECT_RELATION. */ typedef struct { bool is_grant; GrantObjectType objtype; List *objects; bool all_privs; AclMode privileges; List *col_privs; List *grantees; bool grant_option; DropBehavior behavior; } InternalGrant; /* * Internal format used by ALTER DEFAULT PRIVILEGES. */ typedef struct { Oid roleid; /* owning role */ Oid nspid; /* namespace, or InvalidOid if none */ /* remaining fields are same as in InternalGrant: */ bool is_grant; GrantObjectType objtype; bool all_privs; AclMode privileges; List *grantees; bool grant_option; DropBehavior behavior; } InternalDefaultACL; static void ExecGrantStmt_oids(InternalGrant *istmt); static void ExecGrant_Relation(InternalGrant *grantStmt); static void ExecGrant_Database(InternalGrant *grantStmt); static void ExecGrant_Fdw(InternalGrant *grantStmt); static void ExecGrant_ForeignServer(InternalGrant *grantStmt); static void ExecGrant_Function(InternalGrant *grantStmt); static void ExecGrant_Language(InternalGrant *grantStmt); static void ExecGrant_Largeobject(InternalGrant *grantStmt); static void ExecGrant_Namespace(InternalGrant *grantStmt); static void ExecGrant_Tablespace(InternalGrant *grantStmt); static void SetDefaultACLsInSchemas(InternalDefaultACL *iacls, List *nspnames); static void SetDefaultACL(InternalDefaultACL *iacls); static List *objectNamesToOids(GrantObjectType objtype, List *objnames); static List *objectsInSchemaToOids(GrantObjectType objtype, List *nspnames); static List *getRelationsInNamespace(Oid namespaceId, char relkind); static void expand_col_privileges(List *colnames, Oid table_oid, AclMode this_privileges, AclMode *col_privileges, int num_col_privileges); static void expand_all_col_privileges(Oid table_oid, Form_pg_class classForm, AclMode this_privileges, AclMode *col_privileges, int num_col_privileges); static AclMode string_to_privilege(const char *privname); static const char *privilege_to_string(AclMode privilege); static AclMode restrict_and_check_grant(bool is_grant, AclMode avail_goptions, bool all_privs, AclMode privileges, Oid objectId, Oid grantorId, AclObjectKind objkind, const char *objname, AttrNumber att_number, const char *colname); static AclMode pg_aclmask(AclObjectKind objkind, Oid table_oid, AttrNumber attnum, Oid roleid, AclMode mask, AclMaskHow how); #ifdef ACLDEBUG static void dumpacl(Acl *acl) { int i; AclItem *aip; elog(DEBUG2, "acl size = %d, # acls = %d", ACL_SIZE(acl), ACL_NUM(acl)); aip = ACL_DAT(acl); for (i = 0; i < ACL_NUM(acl); ++i) elog(DEBUG2, " acl[%d]: %s", i, DatumGetCString(DirectFunctionCall1(aclitemout, PointerGetDatum(aip + i)))); } #endif /* ACLDEBUG */ /* * If is_grant is true, adds the given privileges for the list of * grantees to the existing old_acl. If is_grant is false, the * privileges for the given grantees are removed from old_acl. * * NB: the original old_acl is pfree'd. */ static Acl * merge_acl_with_grant(Acl *old_acl, bool is_grant, bool grant_option, DropBehavior behavior, List *grantees, AclMode privileges, Oid grantorId, Oid ownerId) { unsigned modechg; ListCell *j; Acl *new_acl; modechg = is_grant ? ACL_MODECHG_ADD : ACL_MODECHG_DEL; #ifdef ACLDEBUG dumpacl(old_acl); #endif new_acl = old_acl; foreach(j, grantees) { AclItem aclitem; Acl *newer_acl; aclitem. ai_grantee = lfirst_oid(j); /* * Grant options can only be granted to individual roles, not PUBLIC. * The reason is that if a user would re-grant a privilege that he * held through PUBLIC, and later the user is removed, the situation * is impossible to clean up. */ if (is_grant && grant_option && aclitem.ai_grantee == ACL_ID_PUBLIC) ereport(ERROR, (errcode(ERRCODE_INVALID_GRANT_OPERATION), errmsg("grant options can only be granted to roles"))); aclitem. ai_grantor = grantorId; /* * The asymmetry in the conditions here comes from the spec. In * GRANT, the grant_option flag signals WITH GRANT OPTION, which means * to grant both the basic privilege and its grant option. But in * REVOKE, plain revoke revokes both the basic privilege and its grant * option, while REVOKE GRANT OPTION revokes only the option. */ ACLITEM_SET_PRIVS_GOPTIONS(aclitem, (is_grant || !grant_option) ? privileges : ACL_NO_RIGHTS, (!is_grant || grant_option) ? privileges : ACL_NO_RIGHTS); newer_acl = aclupdate(new_acl, &aclitem, modechg, ownerId, behavior); /* avoid memory leak when there are many grantees */ pfree(new_acl); new_acl = newer_acl; #ifdef ACLDEBUG dumpacl(new_acl); #endif } return new_acl; } /* * Restrict the privileges to what we can actually grant, and emit * the standards-mandated warning and error messages. */ static AclMode restrict_and_check_grant(bool is_grant, AclMode avail_goptions, bool all_privs, AclMode privileges, Oid objectId, Oid grantorId, AclObjectKind objkind, const char *objname, AttrNumber att_number, const char *colname) { AclMode this_privileges; AclMode whole_mask; switch (objkind) { case ACL_KIND_COLUMN: whole_mask = ACL_ALL_RIGHTS_COLUMN; break; case ACL_KIND_CLASS: whole_mask = ACL_ALL_RIGHTS_RELATION; break; case ACL_KIND_SEQUENCE: whole_mask = ACL_ALL_RIGHTS_SEQUENCE; break; case ACL_KIND_DATABASE: whole_mask = ACL_ALL_RIGHTS_DATABASE; break; case ACL_KIND_PROC: whole_mask = ACL_ALL_RIGHTS_FUNCTION; break; case ACL_KIND_LANGUAGE: whole_mask = ACL_ALL_RIGHTS_LANGUAGE; break; case ACL_KIND_LARGEOBJECT: whole_mask = ACL_ALL_RIGHTS_LARGEOBJECT; break; case ACL_KIND_NAMESPACE: whole_mask = ACL_ALL_RIGHTS_NAMESPACE; break; case ACL_KIND_TABLESPACE: whole_mask = ACL_ALL_RIGHTS_TABLESPACE; break; case ACL_KIND_FDW: whole_mask = ACL_ALL_RIGHTS_FDW; break; case ACL_KIND_FOREIGN_SERVER: whole_mask = ACL_ALL_RIGHTS_FOREIGN_SERVER; break; default: elog(ERROR, "unrecognized object kind: %d", objkind); /* not reached, but keep compiler quiet */ return ACL_NO_RIGHTS; } /* * If we found no grant options, consider whether to issue a hard error. * Per spec, having any privilege at all on the object will get you by * here. */ if (avail_goptions == ACL_NO_RIGHTS) { if (pg_aclmask(objkind, objectId, att_number, grantorId, whole_mask | ACL_GRANT_OPTION_FOR(whole_mask), ACLMASK_ANY) == ACL_NO_RIGHTS) { if (objkind == ACL_KIND_COLUMN && colname) aclcheck_error_col(ACLCHECK_NO_PRIV, objkind, objname, colname); else aclcheck_error(ACLCHECK_NO_PRIV, objkind, objname); } } /* * Restrict the operation to what we can actually grant or revoke, and * issue a warning if appropriate. (For REVOKE this isn't quite what the * spec says to do: the spec seems to want a warning only if no privilege * bits actually change in the ACL. In practice that behavior seems much * too noisy, as well as inconsistent with the GRANT case.) */ this_privileges = privileges & ACL_OPTION_TO_PRIVS(avail_goptions); if (is_grant) { if (this_privileges == 0) { if (objkind == ACL_KIND_COLUMN && colname) ereport(WARNING, (errcode(ERRCODE_WARNING_PRIVILEGE_NOT_GRANTED), errmsg("no privileges were granted for column \"%s\" of relation \"%s\"", colname, objname))); else ereport(WARNING, (errcode(ERRCODE_WARNING_PRIVILEGE_NOT_GRANTED), errmsg("no privileges were granted for \"%s\"", objname))); } else if (!all_privs && this_privileges != privileges) { if (objkind == ACL_KIND_COLUMN && colname) ereport(WARNING, (errcode(ERRCODE_WARNING_PRIVILEGE_NOT_GRANTED), errmsg("not all privileges were granted for column \"%s\" of relation \"%s\"", colname, objname))); else ereport(WARNING, (errcode(ERRCODE_WARNING_PRIVILEGE_NOT_GRANTED), errmsg("not all privileges were granted for \"%s\"", objname))); } } else { if (this_privileges == 0) { if (objkind == ACL_KIND_COLUMN && colname) ereport(WARNING, (errcode(ERRCODE_WARNING_PRIVILEGE_NOT_REVOKED), errmsg("no privileges could be revoked for column \"%s\" of relation \"%s\"", colname, objname))); else ereport(WARNING, (errcode(ERRCODE_WARNING_PRIVILEGE_NOT_REVOKED), errmsg("no privileges could be revoked for \"%s\"", objname))); } else if (!all_privs && this_privileges != privileges) { if (objkind == ACL_KIND_COLUMN && colname) ereport(WARNING, (errcode(ERRCODE_WARNING_PRIVILEGE_NOT_REVOKED), errmsg("not all privileges could be revoked for column \"%s\" of relation \"%s\"", colname, objname))); else ereport(WARNING, (errcode(ERRCODE_WARNING_PRIVILEGE_NOT_REVOKED), errmsg("not all privileges could be revoked for \"%s\"", objname))); } } return this_privileges; } /* * Called to execute the utility commands GRANT and REVOKE */ void ExecuteGrantStmt(GrantStmt *stmt) { InternalGrant istmt; ListCell *cell; const char *errormsg; AclMode all_privileges; /* * Turn the regular GrantStmt into the InternalGrant form. */ istmt.is_grant = stmt->is_grant; istmt.objtype = stmt->objtype; /* Collect the OIDs of the target objects */ switch (stmt->targtype) { case ACL_TARGET_OBJECT: istmt.objects = objectNamesToOids(stmt->objtype, stmt->objects); break; case ACL_TARGET_ALL_IN_SCHEMA: istmt.objects = objectsInSchemaToOids(stmt->objtype, stmt->objects); break; /* ACL_TARGET_DEFAULTS should not be seen here */ default: elog(ERROR, "unrecognized GrantStmt.targtype: %d", (int) stmt->targtype); } /* all_privs to be filled below */ /* privileges to be filled below */ istmt.col_privs = NIL; /* may get filled below */ istmt.grantees = NIL; /* filled below */ istmt.grant_option = stmt->grant_option; istmt.behavior = stmt->behavior; /* * Convert the PrivGrantee list into an Oid list. Note that at this point * we insert an ACL_ID_PUBLIC into the list if an empty role name is * detected (which is what the grammar uses if PUBLIC is found), so * downstream there shouldn't be any additional work needed to support * this case. */ foreach(cell, stmt->grantees) { PrivGrantee *grantee = (PrivGrantee *) lfirst(cell); if (grantee->rolname == NULL) istmt.grantees = lappend_oid(istmt.grantees, ACL_ID_PUBLIC); else istmt.grantees = lappend_oid(istmt.grantees, get_role_oid(grantee->rolname, false)); } /* * Convert stmt->privileges, a list of AccessPriv nodes, into an AclMode * bitmask. Note: objtype can't be ACL_OBJECT_COLUMN. */ switch (stmt->objtype) { /* * Because this might be a sequence, we test both relation and * sequence bits, and later do a more limited test when we know * the object type. */ case ACL_OBJECT_RELATION: all_privileges = ACL_ALL_RIGHTS_RELATION | ACL_ALL_RIGHTS_SEQUENCE; errormsg = gettext_noop("invalid privilege type %s for relation"); break; case ACL_OBJECT_SEQUENCE: all_privileges = ACL_ALL_RIGHTS_SEQUENCE; errormsg = gettext_noop("invalid privilege type %s for sequence"); break; case ACL_OBJECT_DATABASE: all_privileges = ACL_ALL_RIGHTS_DATABASE; errormsg = gettext_noop("invalid privilege type %s for database"); break; case ACL_OBJECT_FUNCTION: all_privileges = ACL_ALL_RIGHTS_FUNCTION; errormsg = gettext_noop("invalid privilege type %s for function"); break; case ACL_OBJECT_LANGUAGE: all_privileges = ACL_ALL_RIGHTS_LANGUAGE; errormsg = gettext_noop("invalid privilege type %s for language"); break; case ACL_OBJECT_LARGEOBJECT: all_privileges = ACL_ALL_RIGHTS_LARGEOBJECT; errormsg = gettext_noop("invalid privilege type %s for large object"); break; case ACL_OBJECT_NAMESPACE: all_privileges = ACL_ALL_RIGHTS_NAMESPACE; errormsg = gettext_noop("invalid privilege type %s for schema"); break; case ACL_OBJECT_TABLESPACE: all_privileges = ACL_ALL_RIGHTS_TABLESPACE; errormsg = gettext_noop("invalid privilege type %s for tablespace"); break; case ACL_OBJECT_FDW: all_privileges = ACL_ALL_RIGHTS_FDW; errormsg = gettext_noop("invalid privilege type %s for foreign-data wrapper"); break; case ACL_OBJECT_FOREIGN_SERVER: all_privileges = ACL_ALL_RIGHTS_FOREIGN_SERVER; errormsg = gettext_noop("invalid privilege type %s for foreign server"); break; default: elog(ERROR, "unrecognized GrantStmt.objtype: %d", (int) stmt->objtype); /* keep compiler quiet */ all_privileges = ACL_NO_RIGHTS; errormsg = NULL; } if (stmt->privileges == NIL) { istmt.all_privs = true; /* * will be turned into ACL_ALL_RIGHTS_* by the internal routines * depending on the object type */ istmt.privileges = ACL_NO_RIGHTS; } else { istmt.all_privs = false; istmt.privileges = ACL_NO_RIGHTS; foreach(cell, stmt->privileges) { AccessPriv *privnode = (AccessPriv *) lfirst(cell); AclMode priv; /* * If it's a column-level specification, we just set it aside in * col_privs for the moment; but insist it's for a relation. */ if (privnode->cols) { if (stmt->objtype != ACL_OBJECT_RELATION) ereport(ERROR, (errcode(ERRCODE_INVALID_GRANT_OPERATION), errmsg("column privileges are only valid for relations"))); istmt.col_privs = lappend(istmt.col_privs, privnode); continue; } if (privnode->priv_name == NULL) /* parser mistake? */ elog(ERROR, "AccessPriv node must specify privilege or columns"); priv = string_to_privilege(privnode->priv_name); if (priv & ~((AclMode) all_privileges)) ereport(ERROR, (errcode(ERRCODE_INVALID_GRANT_OPERATION), errmsg(errormsg, privilege_to_string(priv)))); istmt.privileges |= priv; } } ExecGrantStmt_oids(&istmt); } /* * ExecGrantStmt_oids * * Internal entry point for granting and revoking privileges. */ static void ExecGrantStmt_oids(InternalGrant *istmt) { switch (istmt->objtype) { case ACL_OBJECT_RELATION: case ACL_OBJECT_SEQUENCE: ExecGrant_Relation(istmt); break; case ACL_OBJECT_DATABASE: ExecGrant_Database(istmt); break; case ACL_OBJECT_FDW: ExecGrant_Fdw(istmt); break; case ACL_OBJECT_FOREIGN_SERVER: ExecGrant_ForeignServer(istmt); break; case ACL_OBJECT_FUNCTION: ExecGrant_Function(istmt); break; case ACL_OBJECT_LANGUAGE: ExecGrant_Language(istmt); break; case ACL_OBJECT_LARGEOBJECT: ExecGrant_Largeobject(istmt); break; case ACL_OBJECT_NAMESPACE: ExecGrant_Namespace(istmt); break; case ACL_OBJECT_TABLESPACE: ExecGrant_Tablespace(istmt); break; default: elog(ERROR, "unrecognized GrantStmt.objtype: %d", (int) istmt->objtype); } } /* * objectNamesToOids * * Turn a list of object names of a given type into an Oid list. */ static List * objectNamesToOids(GrantObjectType objtype, List *objnames) { List *objects = NIL; ListCell *cell; Assert(objnames != NIL); switch (objtype) { case ACL_OBJECT_RELATION: case ACL_OBJECT_SEQUENCE: foreach(cell, objnames) { RangeVar *relvar = (RangeVar *) lfirst(cell); Oid relOid; relOid = RangeVarGetRelid(relvar, false); objects = lappend_oid(objects, relOid); } break; case ACL_OBJECT_DATABASE: foreach(cell, objnames) { char *dbname = strVal(lfirst(cell)); Oid dbid; dbid = get_database_oid(dbname, false); objects = lappend_oid(objects, dbid); } break; case ACL_OBJECT_FUNCTION: foreach(cell, objnames) { FuncWithArgs *func = (FuncWithArgs *) lfirst(cell); Oid funcid; funcid = LookupFuncNameTypeNames(func->funcname, func->funcargs, false); objects = lappend_oid(objects, funcid); } break; case ACL_OBJECT_LANGUAGE: foreach(cell, objnames) { char *langname = strVal(lfirst(cell)); Oid oid; oid = get_language_oid(langname, false); objects = lappend_oid(objects, oid); } break; case ACL_OBJECT_LARGEOBJECT: foreach(cell, objnames) { Oid lobjOid = oidparse(lfirst(cell)); if (!LargeObjectExists(lobjOid)) ereport(ERROR, (errcode(ERRCODE_UNDEFINED_OBJECT), errmsg("large object %u does not exist", lobjOid))); objects = lappend_oid(objects, lobjOid); } break; case ACL_OBJECT_NAMESPACE: foreach(cell, objnames) { char *nspname = strVal(lfirst(cell)); Oid oid; oid = get_namespace_oid(nspname, false); objects = lappend_oid(objects, oid); } break; case ACL_OBJECT_TABLESPACE: foreach(cell, objnames) { char *spcname = strVal(lfirst(cell)); Oid spcoid; spcoid = get_tablespace_oid(spcname, false); objects = lappend_oid(objects, spcoid); } break; case ACL_OBJECT_FDW: foreach(cell, objnames) { char *fdwname = strVal(lfirst(cell)); Oid fdwid = GetForeignDataWrapperOidByName(fdwname, false); objects = lappend_oid(objects, fdwid); } break; case ACL_OBJECT_FOREIGN_SERVER: foreach(cell, objnames) { char *srvname = strVal(lfirst(cell)); Oid srvid = GetForeignServerOidByName(srvname, false); objects = lappend_oid(objects, srvid); } break; default: elog(ERROR, "unrecognized GrantStmt.objtype: %d", (int) objtype); } return objects; } /* * objectsInSchemaToOids * * Find all objects of a given type in specified schemas, and make a list * of their Oids. We check USAGE privilege on the schemas, but there is * no privilege checking on the individual objects here. */ static List * objectsInSchemaToOids(GrantObjectType objtype, List *nspnames) { List *objects = NIL; ListCell *cell; foreach(cell, nspnames) { char *nspname = strVal(lfirst(cell)); Oid namespaceId; List *objs; namespaceId = LookupExplicitNamespace(nspname); switch (objtype) { case ACL_OBJECT_RELATION: /* Process both regular tables and views */ objs = getRelationsInNamespace(namespaceId, RELKIND_RELATION); objects = list_concat(objects, objs); objs = getRelationsInNamespace(namespaceId, RELKIND_VIEW); objects = list_concat(objects, objs); break; case ACL_OBJECT_SEQUENCE: objs = getRelationsInNamespace(namespaceId, RELKIND_SEQUENCE); objects = list_concat(objects, objs); break; case ACL_OBJECT_FUNCTION: { ScanKeyData key[1]; Relation rel; HeapScanDesc scan; HeapTuple tuple; ScanKeyInit(&key[0], Anum_pg_proc_pronamespace, BTEqualStrategyNumber, F_OIDEQ, ObjectIdGetDatum(namespaceId)); rel = heap_open(ProcedureRelationId, AccessShareLock); scan = heap_beginscan(rel, SnapshotNow, 1, key); while ((tuple = heap_getnext(scan, ForwardScanDirection)) != NULL) { objects = lappend_oid(objects, HeapTupleGetOid(tuple)); } heap_endscan(scan); heap_close(rel, AccessShareLock); } break; default: /* should not happen */ elog(ERROR, "unrecognized GrantStmt.objtype: %d", (int) objtype); } } return objects; } /* * getRelationsInNamespace * * Return Oid list of relations in given namespace filtered by relation kind */ static List * getRelationsInNamespace(Oid namespaceId, char relkind) { List *relations = NIL; ScanKeyData key[2]; Relation rel; HeapScanDesc scan; HeapTuple tuple; ScanKeyInit(&key[0], Anum_pg_class_relnamespace, BTEqualStrategyNumber, F_OIDEQ, ObjectIdGetDatum(namespaceId)); ScanKeyInit(&key[1], Anum_pg_class_relkind, BTEqualStrategyNumber, F_CHAREQ, CharGetDatum(relkind)); rel = heap_open(RelationRelationId, AccessShareLock); scan = heap_beginscan(rel, SnapshotNow, 2, key); while ((tuple = heap_getnext(scan, ForwardScanDirection)) != NULL) { relations = lappend_oid(relations, HeapTupleGetOid(tuple)); } heap_endscan(scan); heap_close(rel, AccessShareLock); return relations; } /* * ALTER DEFAULT PRIVILEGES statement */ void ExecAlterDefaultPrivilegesStmt(AlterDefaultPrivilegesStmt *stmt) { GrantStmt *action = stmt->action; InternalDefaultACL iacls; ListCell *cell; List *rolenames = NIL; List *nspnames = NIL; DefElem *drolenames = NULL; DefElem *dnspnames = NULL; AclMode all_privileges; const char *errormsg; /* Deconstruct the "options" part of the statement */ foreach(cell, stmt->options) { DefElem *defel = (DefElem *) lfirst(cell); if (strcmp(defel->defname, "schemas") == 0) { if (dnspnames) ereport(ERROR, (errcode(ERRCODE_SYNTAX_ERROR), errmsg("conflicting or redundant options"))); dnspnames = defel; } else if (strcmp(defel->defname, "roles") == 0) { if (drolenames) ereport(ERROR, (errcode(ERRCODE_SYNTAX_ERROR), errmsg("conflicting or redundant options"))); drolenames = defel; } else elog(ERROR, "option \"%s\" not recognized", defel->defname); } if (dnspnames) nspnames = (List *) dnspnames->arg; if (drolenames) rolenames = (List *) drolenames->arg; /* Prepare the InternalDefaultACL representation of the statement */ /* roleid to be filled below */ /* nspid to be filled in SetDefaultACLsInSchemas */ iacls.is_grant = action->is_grant; iacls.objtype = action->objtype; /* all_privs to be filled below */ /* privileges to be filled below */ iacls.grantees = NIL; /* filled below */ iacls.grant_option = action->grant_option; iacls.behavior = action->behavior; /* * Convert the PrivGrantee list into an Oid list. Note that at this point * we insert an ACL_ID_PUBLIC into the list if an empty role name is * detected (which is what the grammar uses if PUBLIC is found), so * downstream there shouldn't be any additional work needed to support * this case. */ foreach(cell, action->grantees) { PrivGrantee *grantee = (PrivGrantee *) lfirst(cell); if (grantee->rolname == NULL) iacls.grantees = lappend_oid(iacls.grantees, ACL_ID_PUBLIC); else iacls.grantees = lappend_oid(iacls.grantees, get_role_oid(grantee->rolname, false)); } /* * Convert action->privileges, a list of privilege strings, into an * AclMode bitmask. */ switch (action->objtype) { case ACL_OBJECT_RELATION: all_privileges = ACL_ALL_RIGHTS_RELATION; errormsg = gettext_noop("invalid privilege type %s for relation"); break; case ACL_OBJECT_SEQUENCE: all_privileges = ACL_ALL_RIGHTS_SEQUENCE; errormsg = gettext_noop("invalid privilege type %s for sequence"); break; case ACL_OBJECT_FUNCTION: all_privileges = ACL_ALL_RIGHTS_FUNCTION; errormsg = gettext_noop("invalid privilege type %s for function"); break; default: elog(ERROR, "unrecognized GrantStmt.objtype: %d", (int) action->objtype); /* keep compiler quiet */ all_privileges = ACL_NO_RIGHTS; errormsg = NULL; } if (action->privileges == NIL) { iacls.all_privs = true; /* * will be turned into ACL_ALL_RIGHTS_* by the internal routines * depending on the object type */ iacls.privileges = ACL_NO_RIGHTS; } else { iacls.all_privs = false; iacls.privileges = ACL_NO_RIGHTS; foreach(cell, action->privileges) { AccessPriv *privnode = (AccessPriv *) lfirst(cell); AclMode priv; if (privnode->cols) ereport(ERROR, (errcode(ERRCODE_INVALID_GRANT_OPERATION), errmsg("default privileges cannot be set for columns"))); if (privnode->priv_name == NULL) /* parser mistake? */ elog(ERROR, "AccessPriv node must specify privilege"); priv = string_to_privilege(privnode->priv_name); if (priv & ~((AclMode) all_privileges)) ereport(ERROR, (errcode(ERRCODE_INVALID_GRANT_OPERATION), errmsg(errormsg, privilege_to_string(priv)))); iacls.privileges |= priv; } } if (rolenames == NIL) { /* Set permissions for myself */ iacls.roleid = GetUserId(); SetDefaultACLsInSchemas(&iacls, nspnames); } else { /* Look up the role OIDs and do permissions checks */ ListCell *rolecell; foreach(rolecell, rolenames) { char *rolename = strVal(lfirst(rolecell)); iacls.roleid = get_role_oid(rolename, false); /* * We insist that calling user be a member of each target role. If * he has that, he could become that role anyway via SET ROLE, so * FOR ROLE is just a syntactic convenience and doesn't give any * special privileges. */ check_is_member_of_role(GetUserId(), iacls.roleid); SetDefaultACLsInSchemas(&iacls, nspnames); } } } /* * Process ALTER DEFAULT PRIVILEGES for a list of target schemas * * All fields of *iacls except nspid were filled already */ static void SetDefaultACLsInSchemas(InternalDefaultACL *iacls, List *nspnames) { if (nspnames == NIL) { /* Set database-wide permissions if no schema was specified */ iacls->nspid = InvalidOid; SetDefaultACL(iacls); } else { /* Look up the schema OIDs and do permissions checks */ ListCell *nspcell; foreach(nspcell, nspnames) { char *nspname = strVal(lfirst(nspcell)); AclResult aclresult; /* * Note that we must do the permissions check against the target * role not the calling user. We require CREATE privileges, * since without CREATE you won't be able to do anything using the * default privs anyway. */ iacls->nspid = get_namespace_oid(nspname, false); aclresult = pg_namespace_aclcheck(iacls->nspid, iacls->roleid, ACL_CREATE); if (aclresult != ACLCHECK_OK) aclcheck_error(aclresult, ACL_KIND_NAMESPACE, nspname); SetDefaultACL(iacls); } } } /* * Create or update a pg_default_acl entry */ static void SetDefaultACL(InternalDefaultACL *iacls) { AclMode this_privileges = iacls->privileges; char objtype; Relation rel; HeapTuple tuple; bool isNew; Acl *def_acl; Acl *old_acl; Acl *new_acl; HeapTuple newtuple; Datum values[Natts_pg_default_acl]; bool nulls[Natts_pg_default_acl]; bool replaces[Natts_pg_default_acl]; int noldmembers; int nnewmembers; Oid *oldmembers; Oid *newmembers; rel = heap_open(DefaultAclRelationId, RowExclusiveLock); /* * The default for a global entry is the hard-wired default ACL for the * particular object type. The default for non-global entries is an empty * ACL. This must be so because global entries replace the hard-wired * defaults, while others are added on. */ if (!OidIsValid(iacls->nspid)) def_acl = acldefault(iacls->objtype, iacls->roleid); else def_acl = make_empty_acl(); /* * Convert ACL object type to pg_default_acl object type and handle * all_privs option */ switch (iacls->objtype) { case ACL_OBJECT_RELATION: objtype = DEFACLOBJ_RELATION; if (iacls->all_privs && this_privileges == ACL_NO_RIGHTS) this_privileges = ACL_ALL_RIGHTS_RELATION; break; case ACL_OBJECT_SEQUENCE: objtype = DEFACLOBJ_SEQUENCE; if (iacls->all_privs && this_privileges == ACL_NO_RIGHTS) this_privileges = ACL_ALL_RIGHTS_SEQUENCE; break; case ACL_OBJECT_FUNCTION: objtype = DEFACLOBJ_FUNCTION; if (iacls->all_privs && this_privileges == ACL_NO_RIGHTS) this_privileges = ACL_ALL_RIGHTS_FUNCTION; break; default: elog(ERROR, "unrecognized objtype: %d", (int) iacls->objtype); objtype = 0; /* keep compiler quiet */ break; } /* Search for existing row for this object type in catalog */ tuple = SearchSysCache3(DEFACLROLENSPOBJ, ObjectIdGetDatum(iacls->roleid), ObjectIdGetDatum(iacls->nspid), CharGetDatum(objtype)); if (HeapTupleIsValid(tuple)) { Datum aclDatum; bool isNull; aclDatum = SysCacheGetAttr(DEFACLROLENSPOBJ, tuple, Anum_pg_default_acl_defaclacl, &isNull); if (!isNull) old_acl = DatumGetAclPCopy(aclDatum); else old_acl = NULL; /* this case shouldn't happen, probably */ isNew = false; } else { old_acl = NULL; isNew = true; } if (old_acl != NULL) { /* * We need the members of both old and new ACLs so we can correct the * shared dependency information. Collect data before * merge_acl_with_grant throws away old_acl. */ noldmembers = aclmembers(old_acl, &oldmembers); } else { /* If no or null entry, start with the default ACL value */ old_acl = aclcopy(def_acl); /* There are no old member roles according to the catalogs */ noldmembers = 0; oldmembers = NULL; } /* * Generate new ACL. Grantor of rights is always the same as the target * role. */ new_acl = merge_acl_with_grant(old_acl, iacls->is_grant, iacls->grant_option, iacls->behavior, iacls->grantees, this_privileges, iacls->roleid, iacls->roleid); /* * If the result is the same as the default value, we do not need an * explicit pg_default_acl entry, and should in fact remove the entry if * it exists. Must sort both arrays to compare properly. */ aclitemsort(new_acl); aclitemsort(def_acl); if (aclequal(new_acl, def_acl)) { /* delete old entry, if indeed there is one */ if (!isNew) { ObjectAddress myself; /* * The dependency machinery will take care of removing all * associated dependency entries. We use DROP_RESTRICT since * there shouldn't be anything depending on this entry. */ myself.classId = DefaultAclRelationId; myself.objectId = HeapTupleGetOid(tuple); myself.objectSubId = 0; performDeletion(&myself, DROP_RESTRICT); } } else { /* Prepare to insert or update pg_default_acl entry */ MemSet(values, 0, sizeof(values)); MemSet(nulls, false, sizeof(nulls)); MemSet(replaces, false, sizeof(replaces)); if (isNew) { /* insert new entry */ values[Anum_pg_default_acl_defaclrole - 1] = ObjectIdGetDatum(iacls->roleid); values[Anum_pg_default_acl_defaclnamespace - 1] = ObjectIdGetDatum(iacls->nspid); values[Anum_pg_default_acl_defaclobjtype - 1] = CharGetDatum(objtype); values[Anum_pg_default_acl_defaclacl - 1] = PointerGetDatum(new_acl); newtuple = heap_form_tuple(RelationGetDescr(rel), values, nulls); simple_heap_insert(rel, newtuple); } else { /* update existing entry */ values[Anum_pg_default_acl_defaclacl - 1] = PointerGetDatum(new_acl); replaces[Anum_pg_default_acl_defaclacl - 1] = true; newtuple = heap_modify_tuple(tuple, RelationGetDescr(rel), values, nulls, replaces); simple_heap_update(rel, &newtuple->t_self, newtuple); } /* keep the catalog indexes up to date */ CatalogUpdateIndexes(rel, newtuple); /* these dependencies don't change in an update */ if (isNew) { /* dependency on role */ recordDependencyOnOwner(DefaultAclRelationId, HeapTupleGetOid(newtuple), iacls->roleid); /* dependency on namespace */ if (OidIsValid(iacls->nspid)) { ObjectAddress myself, referenced; myself.classId = DefaultAclRelationId; myself.objectId = HeapTupleGetOid(newtuple); myself.objectSubId = 0; referenced.classId = NamespaceRelationId; referenced.objectId = iacls->nspid; referenced.objectSubId = 0; recordDependencyOn(&myself, &referenced, DEPENDENCY_AUTO); } } /* * Update the shared dependency ACL info */ nnewmembers = aclmembers(new_acl, &newmembers); updateAclDependencies(DefaultAclRelationId, HeapTupleGetOid(newtuple), 0, iacls->roleid, noldmembers, oldmembers, nnewmembers, newmembers); } if (HeapTupleIsValid(tuple)) ReleaseSysCache(tuple); heap_close(rel, RowExclusiveLock); } /* * RemoveRoleFromObjectACL * * Used by shdepDropOwned to remove mentions of a role in ACLs */ void RemoveRoleFromObjectACL(Oid roleid, Oid classid, Oid objid) { if (classid == DefaultAclRelationId) { InternalDefaultACL iacls; Form_pg_default_acl pg_default_acl_tuple; Relation rel; ScanKeyData skey[1]; SysScanDesc scan; HeapTuple tuple; /* first fetch info needed by SetDefaultACL */ rel = heap_open(DefaultAclRelationId, AccessShareLock); ScanKeyInit(&skey[0], ObjectIdAttributeNumber, BTEqualStrategyNumber, F_OIDEQ, ObjectIdGetDatum(objid)); scan = systable_beginscan(rel, DefaultAclOidIndexId, true, SnapshotNow, 1, skey); tuple = systable_getnext(scan); if (!HeapTupleIsValid(tuple)) elog(ERROR, "could not find tuple for default ACL %u", objid); pg_default_acl_tuple = (Form_pg_default_acl) GETSTRUCT(tuple); iacls.roleid = pg_default_acl_tuple->defaclrole; iacls.nspid = pg_default_acl_tuple->defaclnamespace; switch (pg_default_acl_tuple->defaclobjtype) { case DEFACLOBJ_RELATION: iacls.objtype = ACL_OBJECT_RELATION; break; case ACL_OBJECT_SEQUENCE: iacls.objtype = ACL_OBJECT_SEQUENCE; break; case DEFACLOBJ_FUNCTION: iacls.objtype = ACL_OBJECT_FUNCTION; break; default: /* Shouldn't get here */ elog(ERROR, "unexpected default ACL type %d", pg_default_acl_tuple->defaclobjtype); break; } systable_endscan(scan); heap_close(rel, AccessShareLock); iacls.is_grant = false; iacls.all_privs = true; iacls.privileges = ACL_NO_RIGHTS; iacls.grantees = list_make1_oid(roleid); iacls.grant_option = false; iacls.behavior = DROP_CASCADE; /* Do it */ SetDefaultACL(&iacls); } else { InternalGrant istmt; switch (classid) { case RelationRelationId: /* it's OK to use RELATION for a sequence */ istmt.objtype = ACL_OBJECT_RELATION; break; case DatabaseRelationId: istmt.objtype = ACL_OBJECT_DATABASE; break; case ProcedureRelationId: istmt.objtype = ACL_OBJECT_FUNCTION; break; case LanguageRelationId: istmt.objtype = ACL_OBJECT_LANGUAGE; break; case LargeObjectRelationId: istmt.objtype = ACL_OBJECT_LARGEOBJECT; break; case NamespaceRelationId: istmt.objtype = ACL_OBJECT_NAMESPACE; break; case TableSpaceRelationId: istmt.objtype = ACL_OBJECT_TABLESPACE; break; default: elog(ERROR, "unexpected object class %u", classid); break; } istmt.is_grant = false; istmt.objects = list_make1_oid(objid); istmt.all_privs = true; istmt.privileges = ACL_NO_RIGHTS; istmt.col_privs = NIL; istmt.grantees = list_make1_oid(roleid); istmt.grant_option = false; istmt.behavior = DROP_CASCADE; ExecGrantStmt_oids(&istmt); } } /* * Remove a pg_default_acl entry */ void RemoveDefaultACLById(Oid defaclOid) { Relation rel; ScanKeyData skey[1]; SysScanDesc scan; HeapTuple tuple; rel = heap_open(DefaultAclRelationId, RowExclusiveLock); ScanKeyInit(&skey[0], ObjectIdAttributeNumber, BTEqualStrategyNumber, F_OIDEQ, ObjectIdGetDatum(defaclOid)); scan = systable_beginscan(rel, DefaultAclOidIndexId, true, SnapshotNow, 1, skey); tuple = systable_getnext(scan); if (!HeapTupleIsValid(tuple)) elog(ERROR, "could not find tuple for default ACL %u", defaclOid); simple_heap_delete(rel, &tuple->t_self); systable_endscan(scan); heap_close(rel, RowExclusiveLock); } /* * expand_col_privileges * * OR the specified privilege(s) into per-column array entries for each * specified attribute. The per-column array is indexed starting at * FirstLowInvalidHeapAttributeNumber, up to relation's last attribute. */ static void expand_col_privileges(List *colnames, Oid table_oid, AclMode this_privileges, AclMode *col_privileges, int num_col_privileges) { ListCell *cell; foreach(cell, colnames) { char *colname = strVal(lfirst(cell)); AttrNumber attnum; attnum = get_attnum(table_oid, colname); if (attnum == InvalidAttrNumber) ereport(ERROR, (errcode(ERRCODE_UNDEFINED_COLUMN), errmsg("column \"%s\" of relation \"%s\" does not exist", colname, get_rel_name(table_oid)))); attnum -= FirstLowInvalidHeapAttributeNumber; if (attnum <= 0 || attnum >= num_col_privileges) elog(ERROR, "column number out of range"); /* safety check */ col_privileges[attnum] |= this_privileges; } } /* * expand_all_col_privileges * * OR the specified privilege(s) into per-column array entries for each valid * attribute of a relation. The per-column array is indexed starting at * FirstLowInvalidHeapAttributeNumber, up to relation's last attribute. */ static void expand_all_col_privileges(Oid table_oid, Form_pg_class classForm, AclMode this_privileges, AclMode *col_privileges, int num_col_privileges) { AttrNumber curr_att; Assert(classForm->relnatts - FirstLowInvalidHeapAttributeNumber < num_col_privileges); for (curr_att = FirstLowInvalidHeapAttributeNumber + 1; curr_att <= classForm->relnatts; curr_att++) { HeapTuple attTuple; bool isdropped; if (curr_att == InvalidAttrNumber) continue; /* Skip OID column if it doesn't exist */ if (curr_att == ObjectIdAttributeNumber && !classForm->relhasoids) continue; /* Views don't have any system columns at all */ if (classForm->relkind == RELKIND_VIEW && curr_att < 0) continue; attTuple = SearchSysCache2(ATTNUM, ObjectIdGetDatum(table_oid), Int16GetDatum(curr_att)); if (!HeapTupleIsValid(attTuple)) elog(ERROR, "cache lookup failed for attribute %d of relation %u", curr_att, table_oid); isdropped = ((Form_pg_attribute) GETSTRUCT(attTuple))->attisdropped; ReleaseSysCache(attTuple); /* ignore dropped columns */ if (isdropped) continue; col_privileges[curr_att - FirstLowInvalidHeapAttributeNumber] |= this_privileges; } } /* * This processes attributes, but expects to be called from * ExecGrant_Relation, not directly from ExecGrantStmt. */ static void ExecGrant_Attribute(InternalGrant *istmt, Oid relOid, const char *relname, AttrNumber attnum, Oid ownerId, AclMode col_privileges, Relation attRelation, const Acl *old_rel_acl) { HeapTuple attr_tuple; Form_pg_attribute pg_attribute_tuple; Acl *old_acl; Acl *new_acl; Acl *merged_acl; Datum aclDatum; bool isNull; Oid grantorId; AclMode avail_goptions; bool need_update; HeapTuple newtuple; Datum values[Natts_pg_attribute]; bool nulls[Natts_pg_attribute]; bool replaces[Natts_pg_attribute]; int noldmembers; int nnewmembers; Oid *oldmembers; Oid *newmembers; attr_tuple = SearchSysCache2(ATTNUM, ObjectIdGetDatum(relOid), Int16GetDatum(attnum)); if (!HeapTupleIsValid(attr_tuple)) elog(ERROR, "cache lookup failed for attribute %d of relation %u", attnum, relOid); pg_attribute_tuple = (Form_pg_attribute) GETSTRUCT(attr_tuple); /* * Get working copy of existing ACL. If there's no ACL, substitute the * proper default. */ aclDatum = SysCacheGetAttr(ATTNUM, attr_tuple, Anum_pg_attribute_attacl, &isNull); if (isNull) { old_acl = acldefault(ACL_OBJECT_COLUMN, ownerId); /* There are no old member roles according to the catalogs */ noldmembers = 0; oldmembers = NULL; } else { old_acl = DatumGetAclPCopy(aclDatum); /* Get the roles mentioned in the existing ACL */ noldmembers = aclmembers(old_acl, &oldmembers); } /* * In select_best_grantor we should consider existing table-level ACL bits * as well as the per-column ACL. Build a new ACL that is their * concatenation. (This is a bit cheap and dirty compared to merging them * properly with no duplications, but it's all we need here.) */ merged_acl = aclconcat(old_rel_acl, old_acl); /* Determine ID to do the grant as, and available grant options */ select_best_grantor(GetUserId(), col_privileges, merged_acl, ownerId, &grantorId, &avail_goptions); pfree(merged_acl); /* * Restrict the privileges to what we can actually grant, and emit the * standards-mandated warning and error messages. Note: we don't track * whether the user actually used the ALL PRIVILEGES(columns) syntax for * each column; we just approximate it by whether all the possible * privileges are specified now. Since the all_privs flag only determines * whether a warning is issued, this seems close enough. */ col_privileges = restrict_and_check_grant(istmt->is_grant, avail_goptions, (col_privileges == ACL_ALL_RIGHTS_COLUMN), col_privileges, relOid, grantorId, ACL_KIND_COLUMN, relname, attnum, NameStr(pg_attribute_tuple->attname)); /* * Generate new ACL. */ new_acl = merge_acl_with_grant(old_acl, istmt->is_grant, istmt->grant_option, istmt->behavior, istmt->grantees, col_privileges, grantorId, ownerId); /* * We need the members of both old and new ACLs so we can correct the * shared dependency information. */ nnewmembers = aclmembers(new_acl, &newmembers); /* finished building new ACL value, now insert it */ MemSet(values, 0, sizeof(values)); MemSet(nulls, false, sizeof(nulls)); MemSet(replaces, false, sizeof(replaces)); /* * If the updated ACL is empty, we can set attacl to null, and maybe even * avoid an update of the pg_attribute row. This is worth testing because * we'll come through here multiple times for any relation-level REVOKE, * even if there were never any column GRANTs. Note we are assuming that * the "default" ACL state for columns is empty. */ if (ACL_NUM(new_acl) > 0) { values[Anum_pg_attribute_attacl - 1] = PointerGetDatum(new_acl); need_update = true; } else { nulls[Anum_pg_attribute_attacl - 1] = true; need_update = !isNull; } replaces[Anum_pg_attribute_attacl - 1] = true; if (need_update) { newtuple = heap_modify_tuple(attr_tuple, RelationGetDescr(attRelation), values, nulls, replaces); simple_heap_update(attRelation, &newtuple->t_self, newtuple); /* keep the catalog indexes up to date */ CatalogUpdateIndexes(attRelation, newtuple); /* Update the shared dependency ACL info */ updateAclDependencies(RelationRelationId, relOid, attnum, ownerId, noldmembers, oldmembers, nnewmembers, newmembers); } pfree(new_acl); ReleaseSysCache(attr_tuple); } /* * This processes both sequences and non-sequences. */ static void ExecGrant_Relation(InternalGrant *istmt) { Relation relation; Relation attRelation; ListCell *cell; relation = heap_open(RelationRelationId, RowExclusiveLock); attRelation = heap_open(AttributeRelationId, RowExclusiveLock); foreach(cell, istmt->objects) { Oid relOid = lfirst_oid(cell); Datum aclDatum; Form_pg_class pg_class_tuple; bool isNull; AclMode this_privileges; AclMode *col_privileges; int num_col_privileges; bool have_col_privileges; Acl *old_acl; Acl *old_rel_acl; int noldmembers; Oid *oldmembers; Oid ownerId; HeapTuple tuple; ListCell *cell_colprivs; tuple = SearchSysCache1(RELOID, ObjectIdGetDatum(relOid)); if (!HeapTupleIsValid(tuple)) elog(ERROR, "cache lookup failed for relation %u", relOid); pg_class_tuple = (Form_pg_class) GETSTRUCT(tuple); /* Not sensible to grant on an index */ if (pg_class_tuple->relkind == RELKIND_INDEX) ereport(ERROR, (errcode(ERRCODE_WRONG_OBJECT_TYPE), errmsg("\"%s\" is an index", NameStr(pg_class_tuple->relname)))); /* Composite types aren't tables either */ if (pg_class_tuple->relkind == RELKIND_COMPOSITE_TYPE) ereport(ERROR, (errcode(ERRCODE_WRONG_OBJECT_TYPE), errmsg("\"%s\" is a composite type", NameStr(pg_class_tuple->relname)))); /* Used GRANT SEQUENCE on a non-sequence? */ if (istmt->objtype == ACL_OBJECT_SEQUENCE && pg_class_tuple->relkind != RELKIND_SEQUENCE) ereport(ERROR, (errcode(ERRCODE_WRONG_OBJECT_TYPE), errmsg("\"%s\" is not a sequence", NameStr(pg_class_tuple->relname)))); /* Adjust the default permissions based on whether it is a sequence */ if (istmt->all_privs && istmt->privileges == ACL_NO_RIGHTS) { if (pg_class_tuple->relkind == RELKIND_SEQUENCE) this_privileges = ACL_ALL_RIGHTS_SEQUENCE; else this_privileges = ACL_ALL_RIGHTS_RELATION; } else this_privileges = istmt->privileges; /* * The GRANT TABLE syntax can be used for sequences and non-sequences, * so we have to look at the relkind to determine the supported * permissions. The OR of table and sequence permissions were already * checked. */ if (istmt->objtype == ACL_OBJECT_RELATION) { if (pg_class_tuple->relkind == RELKIND_SEQUENCE) { /* * For backward compatibility, just throw a warning for * invalid sequence permissions when using the non-sequence * GRANT syntax. */ if (this_privileges & ~((AclMode) ACL_ALL_RIGHTS_SEQUENCE)) { /* * Mention the object name because the user needs to know * which operations succeeded. This is required because * WARNING allows the command to continue. */ ereport(WARNING, (errcode(ERRCODE_INVALID_GRANT_OPERATION), errmsg("sequence \"%s\" only supports USAGE, SELECT, and UPDATE privileges", NameStr(pg_class_tuple->relname)))); this_privileges &= (AclMode) ACL_ALL_RIGHTS_SEQUENCE; } } else { if (this_privileges & ~((AclMode) ACL_ALL_RIGHTS_RELATION)) { /* * USAGE is the only permission supported by sequences but * not by non-sequences. Don't mention the object name * because we didn't in the combined TABLE | SEQUENCE * check. */ ereport(ERROR, (errcode(ERRCODE_INVALID_GRANT_OPERATION), errmsg("invalid privilege type USAGE for table"))); } } } /* * Set up array in which we'll accumulate any column privilege bits * that need modification. The array is indexed such that entry [0] * corresponds to FirstLowInvalidHeapAttributeNumber. */ num_col_privileges = pg_class_tuple->relnatts - FirstLowInvalidHeapAttributeNumber + 1; col_privileges = (AclMode *) palloc0(num_col_privileges * sizeof(AclMode)); have_col_privileges = false; /* * If we are revoking relation privileges that are also column * privileges, we must implicitly revoke them from each column too, * per SQL spec. (We don't need to implicitly add column privileges * during GRANT because the permissions-checking code always checks * both relation and per-column privileges.) */ if (!istmt->is_grant && (this_privileges & ACL_ALL_RIGHTS_COLUMN) != 0) { expand_all_col_privileges(relOid, pg_class_tuple, this_privileges & ACL_ALL_RIGHTS_COLUMN, col_privileges, num_col_privileges); have_col_privileges = true; } /* * Get owner ID and working copy of existing ACL. If there's no ACL, * substitute the proper default. */ ownerId = pg_class_tuple->relowner; aclDatum = SysCacheGetAttr(RELOID, tuple, Anum_pg_class_relacl, &isNull); if (isNull) { old_acl = acldefault(pg_class_tuple->relkind == RELKIND_SEQUENCE ? ACL_OBJECT_SEQUENCE : ACL_OBJECT_RELATION, ownerId); /* There are no old member roles according to the catalogs */ noldmembers = 0; oldmembers = NULL; } else { old_acl = DatumGetAclPCopy(aclDatum); /* Get the roles mentioned in the existing ACL */ noldmembers = aclmembers(old_acl, &oldmembers); } /* Need an extra copy of original rel ACL for column handling */ old_rel_acl = aclcopy(old_acl); /* * Handle relation-level privileges, if any were specified */ if (this_privileges != ACL_NO_RIGHTS) { AclMode avail_goptions; Acl *new_acl; Oid grantorId; HeapTuple newtuple; Datum values[Natts_pg_class]; bool nulls[Natts_pg_class]; bool replaces[Natts_pg_class]; int nnewmembers; Oid *newmembers; /* Determine ID to do the grant as, and available grant options */ select_best_grantor(GetUserId(), this_privileges, old_acl, ownerId, &grantorId, &avail_goptions); /* * Restrict the privileges to what we can actually grant, and emit * the standards-mandated warning and error messages. */ this_privileges = restrict_and_check_grant(istmt->is_grant, avail_goptions, istmt->all_privs, this_privileges, relOid, grantorId, pg_class_tuple->relkind == RELKIND_SEQUENCE ? ACL_KIND_SEQUENCE : ACL_KIND_CLASS, NameStr(pg_class_tuple->relname), 0, NULL); /* * Generate new ACL. */ new_acl = merge_acl_with_grant(old_acl, istmt->is_grant, istmt->grant_option, istmt->behavior, istmt->grantees, this_privileges, grantorId, ownerId); /* * We need the members of both old and new ACLs so we can correct * the shared dependency information. */ nnewmembers = aclmembers(new_acl, &newmembers); /* finished building new ACL value, now insert it */ MemSet(values, 0, sizeof(values)); MemSet(nulls, false, sizeof(nulls)); MemSet(replaces, false, sizeof(replaces)); replaces[Anum_pg_class_relacl - 1] = true; values[Anum_pg_class_relacl - 1] = PointerGetDatum(new_acl); newtuple = heap_modify_tuple(tuple, RelationGetDescr(relation), values, nulls, replaces); simple_heap_update(relation, &newtuple->t_self, newtuple); /* keep the catalog indexes up to date */ CatalogUpdateIndexes(relation, newtuple); /* Update the shared dependency ACL info */ updateAclDependencies(RelationRelationId, relOid, 0, ownerId, noldmembers, oldmembers, nnewmembers, newmembers); pfree(new_acl); } /* * Handle column-level privileges, if any were specified or implied. * We first expand the user-specified column privileges into the * array, and then iterate over all nonempty array entries. */ foreach(cell_colprivs, istmt->col_privs) { AccessPriv *col_privs = (AccessPriv *) lfirst(cell_colprivs); if (col_privs->priv_name == NULL) this_privileges = ACL_ALL_RIGHTS_COLUMN; else this_privileges = string_to_privilege(col_privs->priv_name); if (this_privileges & ~((AclMode) ACL_ALL_RIGHTS_COLUMN)) ereport(ERROR, (errcode(ERRCODE_INVALID_GRANT_OPERATION), errmsg("invalid privilege type %s for column", privilege_to_string(this_privileges)))); if (pg_class_tuple->relkind == RELKIND_SEQUENCE && this_privileges & ~((AclMode) ACL_SELECT)) { /* * The only column privilege allowed on sequences is SELECT. * This is a warning not error because we do it that way for * relation-level privileges. */ ereport(WARNING, (errcode(ERRCODE_INVALID_GRANT_OPERATION), errmsg("sequence \"%s\" only supports SELECT column privileges", NameStr(pg_class_tuple->relname)))); this_privileges &= (AclMode) ACL_SELECT; } expand_col_privileges(col_privs->cols, relOid, this_privileges, col_privileges, num_col_privileges); have_col_privileges = true; } if (have_col_privileges) { AttrNumber i; for (i = 0; i < num_col_privileges; i++) { if (col_privileges[i] == ACL_NO_RIGHTS) continue; ExecGrant_Attribute(istmt, relOid, NameStr(pg_class_tuple->relname), i + FirstLowInvalidHeapAttributeNumber, ownerId, col_privileges[i], attRelation, old_rel_acl); } } pfree(old_rel_acl); pfree(col_privileges); ReleaseSysCache(tuple); /* prevent error when processing duplicate objects */ CommandCounterIncrement(); } heap_close(attRelation, RowExclusiveLock); heap_close(relation, RowExclusiveLock); } static void ExecGrant_Database(InternalGrant *istmt) { Relation relation; ListCell *cell; if (istmt->all_privs && istmt->privileges == ACL_NO_RIGHTS) istmt->privileges = ACL_ALL_RIGHTS_DATABASE; relation = heap_open(DatabaseRelationId, RowExclusiveLock); foreach(cell, istmt->objects) { Oid datId = lfirst_oid(cell); Form_pg_database pg_database_tuple; Datum aclDatum; bool isNull; AclMode avail_goptions; AclMode this_privileges; Acl *old_acl; Acl *new_acl; Oid grantorId; Oid ownerId; HeapTuple newtuple; Datum values[Natts_pg_database]; bool nulls[Natts_pg_database]; bool replaces[Natts_pg_database]; int noldmembers; int nnewmembers; Oid *oldmembers; Oid *newmembers; HeapTuple tuple; tuple = SearchSysCache1(DATABASEOID, ObjectIdGetDatum(datId)); if (!HeapTupleIsValid(tuple)) elog(ERROR, "cache lookup failed for database %u", datId); pg_database_tuple = (Form_pg_database) GETSTRUCT(tuple); /* * Get owner ID and working copy of existing ACL. If there's no ACL, * substitute the proper default. */ ownerId = pg_database_tuple->datdba; aclDatum = heap_getattr(tuple, Anum_pg_database_datacl, RelationGetDescr(relation), &isNull); if (isNull) { old_acl = acldefault(ACL_OBJECT_DATABASE, ownerId); /* There are no old member roles according to the catalogs */ noldmembers = 0; oldmembers = NULL; } else { old_acl = DatumGetAclPCopy(aclDatum); /* Get the roles mentioned in the existing ACL */ noldmembers = aclmembers(old_acl, &oldmembers); } /* Determine ID to do the grant as, and available grant options */ select_best_grantor(GetUserId(), istmt->privileges, old_acl, ownerId, &grantorId, &avail_goptions); /* * Restrict the privileges to what we can actually grant, and emit the * standards-mandated warning and error messages. */ this_privileges = restrict_and_check_grant(istmt->is_grant, avail_goptions, istmt->all_privs, istmt->privileges, datId, grantorId, ACL_KIND_DATABASE, NameStr(pg_database_tuple->datname), 0, NULL); /* * Generate new ACL. */ new_acl = merge_acl_with_grant(old_acl, istmt->is_grant, istmt->grant_option, istmt->behavior, istmt->grantees, this_privileges, grantorId, ownerId); /* * We need the members of both old and new ACLs so we can correct the * shared dependency information. */ nnewmembers = aclmembers(new_acl, &newmembers); /* finished building new ACL value, now insert it */ MemSet(values, 0, sizeof(values)); MemSet(nulls, false, sizeof(nulls)); MemSet(replaces, false, sizeof(replaces)); replaces[Anum_pg_database_datacl - 1] = true; values[Anum_pg_database_datacl - 1] = PointerGetDatum(new_acl); newtuple = heap_modify_tuple(tuple, RelationGetDescr(relation), values, nulls, replaces); simple_heap_update(relation, &newtuple->t_self, newtuple); /* keep the catalog indexes up to date */ CatalogUpdateIndexes(relation, newtuple); /* Update the shared dependency ACL info */ updateAclDependencies(DatabaseRelationId, HeapTupleGetOid(tuple), 0, ownerId, noldmembers, oldmembers, nnewmembers, newmembers); ReleaseSysCache(tuple); pfree(new_acl); /* prevent error when processing duplicate objects */ CommandCounterIncrement(); } heap_close(relation, RowExclusiveLock); } static void ExecGrant_Fdw(InternalGrant *istmt) { Relation relation; ListCell *cell; if (istmt->all_privs && istmt->privileges == ACL_NO_RIGHTS) istmt->privileges = ACL_ALL_RIGHTS_FDW; relation = heap_open(ForeignDataWrapperRelationId, RowExclusiveLock); foreach(cell, istmt->objects) { Oid fdwid = lfirst_oid(cell); Form_pg_foreign_data_wrapper pg_fdw_tuple; Datum aclDatum; bool isNull; AclMode avail_goptions; AclMode this_privileges; Acl *old_acl; Acl *new_acl; Oid grantorId; Oid ownerId; HeapTuple tuple; HeapTuple newtuple; Datum values[Natts_pg_foreign_data_wrapper]; bool nulls[Natts_pg_foreign_data_wrapper]; bool replaces[Natts_pg_foreign_data_wrapper]; int noldmembers; int nnewmembers; Oid *oldmembers; Oid *newmembers; tuple = SearchSysCache1(FOREIGNDATAWRAPPEROID, ObjectIdGetDatum(fdwid)); if (!HeapTupleIsValid(tuple)) elog(ERROR, "cache lookup failed for foreign-data wrapper %u", fdwid); pg_fdw_tuple = (Form_pg_foreign_data_wrapper) GETSTRUCT(tuple); /* * Get owner ID and working copy of existing ACL. If there's no ACL, * substitute the proper default. */ ownerId = pg_fdw_tuple->fdwowner; aclDatum = SysCacheGetAttr(FOREIGNDATAWRAPPEROID, tuple, Anum_pg_foreign_data_wrapper_fdwacl, &isNull); if (isNull) { old_acl = acldefault(ACL_OBJECT_FDW, ownerId); /* There are no old member roles according to the catalogs */ noldmembers = 0; oldmembers = NULL; } else { old_acl = DatumGetAclPCopy(aclDatum); /* Get the roles mentioned in the existing ACL */ noldmembers = aclmembers(old_acl, &oldmembers); } /* Determine ID to do the grant as, and available grant options */ select_best_grantor(GetUserId(), istmt->privileges, old_acl, ownerId, &grantorId, &avail_goptions); /* * Restrict the privileges to what we can actually grant, and emit the * standards-mandated warning and error messages. */ this_privileges = restrict_and_check_grant(istmt->is_grant, avail_goptions, istmt->all_privs, istmt->privileges, fdwid, grantorId, ACL_KIND_FDW, NameStr(pg_fdw_tuple->fdwname), 0, NULL); /* * Generate new ACL. */ new_acl = merge_acl_with_grant(old_acl, istmt->is_grant, istmt->grant_option, istmt->behavior, istmt->grantees, this_privileges, grantorId, ownerId); /* * We need the members of both old and new ACLs so we can correct the * shared dependency information. */ nnewmembers = aclmembers(new_acl, &newmembers); /* finished building new ACL value, now insert it */ MemSet(values, 0, sizeof(values)); MemSet(nulls, false, sizeof(nulls)); MemSet(replaces, false, sizeof(replaces)); replaces[Anum_pg_foreign_data_wrapper_fdwacl - 1] = true; values[Anum_pg_foreign_data_wrapper_fdwacl - 1] = PointerGetDatum(new_acl); newtuple = heap_modify_tuple(tuple, RelationGetDescr(relation), values, nulls, replaces); simple_heap_update(relation, &newtuple->t_self, newtuple); /* keep the catalog indexes up to date */ CatalogUpdateIndexes(relation, newtuple); /* Update the shared dependency ACL info */ updateAclDependencies(ForeignDataWrapperRelationId, HeapTupleGetOid(tuple), 0, ownerId, noldmembers, oldmembers, nnewmembers, newmembers); ReleaseSysCache(tuple); pfree(new_acl); /* prevent error when processing duplicate objects */ CommandCounterIncrement(); } heap_close(relation, RowExclusiveLock); } static void ExecGrant_ForeignServer(InternalGrant *istmt) { Relation relation; ListCell *cell; if (istmt->all_privs && istmt->privileges == ACL_NO_RIGHTS) istmt->privileges = ACL_ALL_RIGHTS_FOREIGN_SERVER; relation = heap_open(ForeignServerRelationId, RowExclusiveLock); foreach(cell, istmt->objects) { Oid srvid = lfirst_oid(cell); Form_pg_foreign_server pg_server_tuple; Datum aclDatum; bool isNull; AclMode avail_goptions; AclMode this_privileges; Acl *old_acl; Acl *new_acl; Oid grantorId; Oid ownerId; HeapTuple tuple; HeapTuple newtuple; Datum values[Natts_pg_foreign_server]; bool nulls[Natts_pg_foreign_server]; bool replaces[Natts_pg_foreign_server]; int noldmembers; int nnewmembers; Oid *oldmembers; Oid *newmembers; tuple = SearchSysCache1(FOREIGNSERVEROID, ObjectIdGetDatum(srvid)); if (!HeapTupleIsValid(tuple)) elog(ERROR, "cache lookup failed for foreign server %u", srvid); pg_server_tuple = (Form_pg_foreign_server) GETSTRUCT(tuple); /* * Get owner ID and working copy of existing ACL. If there's no ACL, * substitute the proper default. */ ownerId = pg_server_tuple->srvowner; aclDatum = SysCacheGetAttr(FOREIGNSERVEROID, tuple, Anum_pg_foreign_server_srvacl, &isNull); if (isNull) { old_acl = acldefault(ACL_OBJECT_FOREIGN_SERVER, ownerId); /* There are no old member roles according to the catalogs */ noldmembers = 0; oldmembers = NULL; } else { old_acl = DatumGetAclPCopy(aclDatum); /* Get the roles mentioned in the existing ACL */ noldmembers = aclmembers(old_acl, &oldmembers); } /* Determine ID to do the grant as, and available grant options */ select_best_grantor(GetUserId(), istmt->privileges, old_acl, ownerId, &grantorId, &avail_goptions); /* * Restrict the privileges to what we can actually grant, and emit the * standards-mandated warning and error messages. */ this_privileges = restrict_and_check_grant(istmt->is_grant, avail_goptions, istmt->all_privs, istmt->privileges, srvid, grantorId, ACL_KIND_FOREIGN_SERVER, NameStr(pg_server_tuple->srvname), 0, NULL); /* * Generate new ACL. */ new_acl = merge_acl_with_grant(old_acl, istmt->is_grant, istmt->grant_option, istmt->behavior, istmt->grantees, this_privileges, grantorId, ownerId); /* * We need the members of both old and new ACLs so we can correct the * shared dependency information. */ nnewmembers = aclmembers(new_acl, &newmembers); /* finished building new ACL value, now insert it */ MemSet(values, 0, sizeof(values)); MemSet(nulls, false, sizeof(nulls)); MemSet(replaces, false, sizeof(replaces)); replaces[Anum_pg_foreign_server_srvacl - 1] = true; values[Anum_pg_foreign_server_srvacl - 1] = PointerGetDatum(new_acl); newtuple = heap_modify_tuple(tuple, RelationGetDescr(relation), values, nulls, replaces); simple_heap_update(relation, &newtuple->t_self, newtuple); /* keep the catalog indexes up to date */ CatalogUpdateIndexes(relation, newtuple); /* Update the shared dependency ACL info */ updateAclDependencies(ForeignServerRelationId, HeapTupleGetOid(tuple), 0, ownerId, noldmembers, oldmembers, nnewmembers, newmembers); ReleaseSysCache(tuple); pfree(new_acl); /* prevent error when processing duplicate objects */ CommandCounterIncrement(); } heap_close(relation, RowExclusiveLock); } static void ExecGrant_Function(InternalGrant *istmt) { Relation relation; ListCell *cell; if (istmt->all_privs && istmt->privileges == ACL_NO_RIGHTS) istmt->privileges = ACL_ALL_RIGHTS_FUNCTION; relation = heap_open(ProcedureRelationId, RowExclusiveLock); foreach(cell, istmt->objects) { Oid funcId = lfirst_oid(cell); Form_pg_proc pg_proc_tuple; Datum aclDatum; bool isNull; AclMode avail_goptions; AclMode this_privileges; Acl *old_acl; Acl *new_acl; Oid grantorId; Oid ownerId; HeapTuple tuple; HeapTuple newtuple; Datum values[Natts_pg_proc]; bool nulls[Natts_pg_proc]; bool replaces[Natts_pg_proc]; int noldmembers; int nnewmembers; Oid *oldmembers; Oid *newmembers; tuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(funcId)); if (!HeapTupleIsValid(tuple)) elog(ERROR, "cache lookup failed for function %u", funcId); pg_proc_tuple = (Form_pg_proc) GETSTRUCT(tuple); /* * Get owner ID and working copy of existing ACL. If there's no ACL, * substitute the proper default. */ ownerId = pg_proc_tuple->proowner; aclDatum = SysCacheGetAttr(PROCOID, tuple, Anum_pg_proc_proacl, &isNull); if (isNull) { old_acl = acldefault(ACL_OBJECT_FUNCTION, ownerId); /* There are no old member roles according to the catalogs */ noldmembers = 0; oldmembers = NULL; } else { old_acl = DatumGetAclPCopy(aclDatum); /* Get the roles mentioned in the existing ACL */ noldmembers = aclmembers(old_acl, &oldmembers); } /* Determine ID to do the grant as, and available grant options */ select_best_grantor(GetUserId(), istmt->privileges, old_acl, ownerId, &grantorId, &avail_goptions); /* * Restrict the privileges to what we can actually grant, and emit the * standards-mandated warning and error messages. */ this_privileges = restrict_and_check_grant(istmt->is_grant, avail_goptions, istmt->all_privs, istmt->privileges, funcId, grantorId, ACL_KIND_PROC, NameStr(pg_proc_tuple->proname), 0, NULL); /* * Generate new ACL. */ new_acl = merge_acl_with_grant(old_acl, istmt->is_grant, istmt->grant_option, istmt->behavior, istmt->grantees, this_privileges, grantorId, ownerId); /* * We need the members of both old and new ACLs so we can correct the * shared dependency information. */ nnewmembers = aclmembers(new_acl, &newmembers); /* finished building new ACL value, now insert it */ MemSet(values, 0, sizeof(values)); MemSet(nulls, false, sizeof(nulls)); MemSet(replaces, false, sizeof(replaces)); replaces[Anum_pg_proc_proacl - 1] = true; values[Anum_pg_proc_proacl - 1] = PointerGetDatum(new_acl); newtuple = heap_modify_tuple(tuple, RelationGetDescr(relation), values, nulls, replaces); simple_heap_update(relation, &newtuple->t_self, newtuple); /* keep the catalog indexes up to date */ CatalogUpdateIndexes(relation, newtuple); /* Update the shared dependency ACL info */ updateAclDependencies(ProcedureRelationId, funcId, 0, ownerId, noldmembers, oldmembers, nnewmembers, newmembers); ReleaseSysCache(tuple); pfree(new_acl); /* prevent error when processing duplicate objects */ CommandCounterIncrement(); } heap_close(relation, RowExclusiveLock); } static void ExecGrant_Language(InternalGrant *istmt) { Relation relation; ListCell *cell; if (istmt->all_privs && istmt->privileges == ACL_NO_RIGHTS) istmt->privileges = ACL_ALL_RIGHTS_LANGUAGE; relation = heap_open(LanguageRelationId, RowExclusiveLock); foreach(cell, istmt->objects) { Oid langId = lfirst_oid(cell); Form_pg_language pg_language_tuple; Datum aclDatum; bool isNull; AclMode avail_goptions; AclMode this_privileges; Acl *old_acl; Acl *new_acl; Oid grantorId; Oid ownerId; HeapTuple tuple; HeapTuple newtuple; Datum values[Natts_pg_language]; bool nulls[Natts_pg_language]; bool replaces[Natts_pg_language]; int noldmembers; int nnewmembers; Oid *oldmembers; Oid *newmembers; tuple = SearchSysCache1(LANGOID, ObjectIdGetDatum(langId)); if (!HeapTupleIsValid(tuple)) elog(ERROR, "cache lookup failed for language %u", langId); pg_language_tuple = (Form_pg_language) GETSTRUCT(tuple); if (!pg_language_tuple->lanpltrusted) ereport(ERROR, (errcode(ERRCODE_WRONG_OBJECT_TYPE), errmsg("language \"%s\" is not trusted", NameStr(pg_language_tuple->lanname)), errhint("Only superusers can use untrusted languages."))); /* * Get owner ID and working copy of existing ACL. If there's no ACL, * substitute the proper default. */ ownerId = pg_language_tuple->lanowner; aclDatum = SysCacheGetAttr(LANGNAME, tuple, Anum_pg_language_lanacl, &isNull); if (isNull) { old_acl = acldefault(ACL_OBJECT_LANGUAGE, ownerId); /* There are no old member roles according to the catalogs */ noldmembers = 0; oldmembers = NULL; } else { old_acl = DatumGetAclPCopy(aclDatum); /* Get the roles mentioned in the existing ACL */ noldmembers = aclmembers(old_acl, &oldmembers); } /* Determine ID to do the grant as, and available grant options */ select_best_grantor(GetUserId(), istmt->privileges, old_acl, ownerId, &grantorId, &avail_goptions); /* * Restrict the privileges to what we can actually grant, and emit the * standards-mandated warning and error messages. */ this_privileges = restrict_and_check_grant(istmt->is_grant, avail_goptions, istmt->all_privs, istmt->privileges, langId, grantorId, ACL_KIND_LANGUAGE, NameStr(pg_language_tuple->lanname), 0, NULL); /* * Generate new ACL. */ new_acl = merge_acl_with_grant(old_acl, istmt->is_grant, istmt->grant_option, istmt->behavior, istmt->grantees, this_privileges, grantorId, ownerId); /* * We need the members of both old and new ACLs so we can correct the * shared dependency information. */ nnewmembers = aclmembers(new_acl, &newmembers); /* finished building new ACL value, now insert it */ MemSet(values, 0, sizeof(values)); MemSet(nulls, false, sizeof(nulls)); MemSet(replaces, false, sizeof(replaces)); replaces[Anum_pg_language_lanacl - 1] = true; values[Anum_pg_language_lanacl - 1] = PointerGetDatum(new_acl); newtuple = heap_modify_tuple(tuple, RelationGetDescr(relation), values, nulls, replaces); simple_heap_update(relation, &newtuple->t_self, newtuple); /* keep the catalog indexes up to date */ CatalogUpdateIndexes(relation, newtuple); /* Update the shared dependency ACL info */ updateAclDependencies(LanguageRelationId, HeapTupleGetOid(tuple), 0, ownerId, noldmembers, oldmembers, nnewmembers, newmembers); ReleaseSysCache(tuple); pfree(new_acl); /* prevent error when processing duplicate objects */ CommandCounterIncrement(); } heap_close(relation, RowExclusiveLock); } static void ExecGrant_Largeobject(InternalGrant *istmt) { Relation relation; ListCell *cell; if (istmt->all_privs && istmt->privileges == ACL_NO_RIGHTS) istmt->privileges = ACL_ALL_RIGHTS_LARGEOBJECT; relation = heap_open(LargeObjectMetadataRelationId, RowExclusiveLock); foreach(cell, istmt->objects) { Oid loid = lfirst_oid(cell); Form_pg_largeobject_metadata form_lo_meta; char loname[NAMEDATALEN]; Datum aclDatum; bool isNull; AclMode avail_goptions; AclMode this_privileges; Acl *old_acl; Acl *new_acl; Oid grantorId; Oid ownerId; HeapTuple newtuple; Datum values[Natts_pg_largeobject_metadata]; bool nulls[Natts_pg_largeobject_metadata]; bool replaces[Natts_pg_largeobject_metadata]; int noldmembers; int nnewmembers; Oid *oldmembers; Oid *newmembers; ScanKeyData entry[1]; SysScanDesc scan; HeapTuple tuple; /* There's no syscache for pg_largeobject_metadata */ ScanKeyInit(&entry[0], ObjectIdAttributeNumber, BTEqualStrategyNumber, F_OIDEQ, ObjectIdGetDatum(loid)); scan = systable_beginscan(relation, LargeObjectMetadataOidIndexId, true, SnapshotNow, 1, entry); tuple = systable_getnext(scan); if (!HeapTupleIsValid(tuple)) elog(ERROR, "cache lookup failed for large object %u", loid); form_lo_meta = (Form_pg_largeobject_metadata) GETSTRUCT(tuple); /* * Get owner ID and working copy of existing ACL. If there's no ACL, * substitute the proper default. */ ownerId = form_lo_meta->lomowner; aclDatum = heap_getattr(tuple, Anum_pg_largeobject_metadata_lomacl, RelationGetDescr(relation), &isNull); if (isNull) { old_acl = acldefault(ACL_OBJECT_LARGEOBJECT, ownerId); /* There are no old member roles according to the catalogs */ noldmembers = 0; oldmembers = NULL; } else { old_acl = DatumGetAclPCopy(aclDatum); /* Get the roles mentioned in the existing ACL */ noldmembers = aclmembers(old_acl, &oldmembers); } /* Determine ID to do the grant as, and available grant options */ select_best_grantor(GetUserId(), istmt->privileges, old_acl, ownerId, &grantorId, &avail_goptions); /* * Restrict the privileges to what we can actually grant, and emit the * standards-mandated warning and error messages. */ snprintf(loname, sizeof(loname), "large object %u", loid); this_privileges = restrict_and_check_grant(istmt->is_grant, avail_goptions, istmt->all_privs, istmt->privileges, loid, grantorId, ACL_KIND_LARGEOBJECT, loname, 0, NULL); /* * Generate new ACL. */ new_acl = merge_acl_with_grant(old_acl, istmt->is_grant, istmt->grant_option, istmt->behavior, istmt->grantees, this_privileges, grantorId, ownerId); /* * We need the members of both old and new ACLs so we can correct the * shared dependency information. */ nnewmembers = aclmembers(new_acl, &newmembers); /* finished building new ACL value, now insert it */ MemSet(values, 0, sizeof(values)); MemSet(nulls, false, sizeof(nulls)); MemSet(replaces, false, sizeof(replaces)); replaces[Anum_pg_largeobject_metadata_lomacl - 1] = true; values[Anum_pg_largeobject_metadata_lomacl - 1] = PointerGetDatum(new_acl); newtuple = heap_modify_tuple(tuple, RelationGetDescr(relation), values, nulls, replaces); simple_heap_update(relation, &newtuple->t_self, newtuple); /* keep the catalog indexes up to date */ CatalogUpdateIndexes(relation, newtuple); /* Update the shared dependency ACL info */ updateAclDependencies(LargeObjectRelationId, HeapTupleGetOid(tuple), 0, ownerId, noldmembers, oldmembers, nnewmembers, newmembers); systable_endscan(scan); pfree(new_acl); /* prevent error when processing duplicate objects */ CommandCounterIncrement(); } heap_close(relation, RowExclusiveLock); } static void ExecGrant_Namespace(InternalGrant *istmt) { Relation relation; ListCell *cell; if (istmt->all_privs && istmt->privileges == ACL_NO_RIGHTS) istmt->privileges = ACL_ALL_RIGHTS_NAMESPACE; relation = heap_open(NamespaceRelationId, RowExclusiveLock); foreach(cell, istmt->objects) { Oid nspid = lfirst_oid(cell); Form_pg_namespace pg_namespace_tuple; Datum aclDatum; bool isNull; AclMode avail_goptions; AclMode this_privileges; Acl *old_acl; Acl *new_acl; Oid grantorId; Oid ownerId; HeapTuple tuple; HeapTuple newtuple; Datum values[Natts_pg_namespace]; bool nulls[Natts_pg_namespace]; bool replaces[Natts_pg_namespace]; int noldmembers; int nnewmembers; Oid *oldmembers; Oid *newmembers; tuple = SearchSysCache1(NAMESPACEOID, ObjectIdGetDatum(nspid)); if (!HeapTupleIsValid(tuple)) elog(ERROR, "cache lookup failed for namespace %u", nspid); pg_namespace_tuple = (Form_pg_namespace) GETSTRUCT(tuple); /* * Get owner ID and working copy of existing ACL. If there's no ACL, * substitute the proper default. */ ownerId = pg_namespace_tuple->nspowner; aclDatum = SysCacheGetAttr(NAMESPACENAME, tuple, Anum_pg_namespace_nspacl, &isNull); if (isNull) { old_acl = acldefault(ACL_OBJECT_NAMESPACE, ownerId); /* There are no old member roles according to the catalogs */ noldmembers = 0; oldmembers = NULL; } else { old_acl = DatumGetAclPCopy(aclDatum); /* Get the roles mentioned in the existing ACL */ noldmembers = aclmembers(old_acl, &oldmembers); } /* Determine ID to do the grant as, and available grant options */ select_best_grantor(GetUserId(), istmt->privileges, old_acl, ownerId, &grantorId, &avail_goptions); /* * Restrict the privileges to what we can actually grant, and emit the * standards-mandated warning and error messages. */ this_privileges = restrict_and_check_grant(istmt->is_grant, avail_goptions, istmt->all_privs, istmt->privileges, nspid, grantorId, ACL_KIND_NAMESPACE, NameStr(pg_namespace_tuple->nspname), 0, NULL); /* * Generate new ACL. */ new_acl = merge_acl_with_grant(old_acl, istmt->is_grant, istmt->grant_option, istmt->behavior, istmt->grantees, this_privileges, grantorId, ownerId); /* * We need the members of both old and new ACLs so we can correct the * shared dependency information. */ nnewmembers = aclmembers(new_acl, &newmembers); /* finished building new ACL value, now insert it */ MemSet(values, 0, sizeof(values)); MemSet(nulls, false, sizeof(nulls)); MemSet(replaces, false, sizeof(replaces)); replaces[Anum_pg_namespace_nspacl - 1] = true; values[Anum_pg_namespace_nspacl - 1] = PointerGetDatum(new_acl); newtuple = heap_modify_tuple(tuple, RelationGetDescr(relation), values, nulls, replaces); simple_heap_update(relation, &newtuple->t_self, newtuple); /* keep the catalog indexes up to date */ CatalogUpdateIndexes(relation, newtuple); /* Update the shared dependency ACL info */ updateAclDependencies(NamespaceRelationId, HeapTupleGetOid(tuple), 0, ownerId, noldmembers, oldmembers, nnewmembers, newmembers); ReleaseSysCache(tuple); pfree(new_acl); /* prevent error when processing duplicate objects */ CommandCounterIncrement(); } heap_close(relation, RowExclusiveLock); } static void ExecGrant_Tablespace(InternalGrant *istmt) { Relation relation; ListCell *cell; if (istmt->all_privs && istmt->privileges == ACL_NO_RIGHTS) istmt->privileges = ACL_ALL_RIGHTS_TABLESPACE; relation = heap_open(TableSpaceRelationId, RowExclusiveLock); foreach(cell, istmt->objects) { Oid tblId = lfirst_oid(cell); Form_pg_tablespace pg_tablespace_tuple; Datum aclDatum; bool isNull; AclMode avail_goptions; AclMode this_privileges; Acl *old_acl; Acl *new_acl; Oid grantorId; Oid ownerId; HeapTuple newtuple; Datum values[Natts_pg_tablespace]; bool nulls[Natts_pg_tablespace]; bool replaces[Natts_pg_tablespace]; int noldmembers; int nnewmembers; Oid *oldmembers; Oid *newmembers; HeapTuple tuple; /* Search syscache for pg_tablespace */ tuple = SearchSysCache1(TABLESPACEOID, ObjectIdGetDatum(tblId)); if (!HeapTupleIsValid(tuple)) elog(ERROR, "cache lookup failed for tablespace %u", tblId); pg_tablespace_tuple = (Form_pg_tablespace) GETSTRUCT(tuple); /* * Get owner ID and working copy of existing ACL. If there's no ACL, * substitute the proper default. */ ownerId = pg_tablespace_tuple->spcowner; aclDatum = heap_getattr(tuple, Anum_pg_tablespace_spcacl, RelationGetDescr(relation), &isNull); if (isNull) { old_acl = acldefault(ACL_OBJECT_TABLESPACE, ownerId); /* There are no old member roles according to the catalogs */ noldmembers = 0; oldmembers = NULL; } else { old_acl = DatumGetAclPCopy(aclDatum); /* Get the roles mentioned in the existing ACL */ noldmembers = aclmembers(old_acl, &oldmembers); } /* Determine ID to do the grant as, and available grant options */ select_best_grantor(GetUserId(), istmt->privileges, old_acl, ownerId, &grantorId, &avail_goptions); /* * Restrict the privileges to what we can actually grant, and emit the * standards-mandated warning and error messages. */ this_privileges = restrict_and_check_grant(istmt->is_grant, avail_goptions, istmt->all_privs, istmt->privileges, tblId, grantorId, ACL_KIND_TABLESPACE, NameStr(pg_tablespace_tuple->spcname), 0, NULL); /* * Generate new ACL. */ new_acl = merge_acl_with_grant(old_acl, istmt->is_grant, istmt->grant_option, istmt->behavior, istmt->grantees, this_privileges, grantorId, ownerId); /* * We need the members of both old and new ACLs so we can correct the * shared dependency information. */ nnewmembers = aclmembers(new_acl, &newmembers); /* finished building new ACL value, now insert it */ MemSet(values, 0, sizeof(values)); MemSet(nulls, false, sizeof(nulls)); MemSet(replaces, false, sizeof(replaces)); replaces[Anum_pg_tablespace_spcacl - 1] = true; values[Anum_pg_tablespace_spcacl - 1] = PointerGetDatum(new_acl); newtuple = heap_modify_tuple(tuple, RelationGetDescr(relation), values, nulls, replaces); simple_heap_update(relation, &newtuple->t_self, newtuple); /* keep the catalog indexes up to date */ CatalogUpdateIndexes(relation, newtuple); /* Update the shared dependency ACL info */ updateAclDependencies(TableSpaceRelationId, tblId, 0, ownerId, noldmembers, oldmembers, nnewmembers, newmembers); ReleaseSysCache(tuple); pfree(new_acl); /* prevent error when processing duplicate objects */ CommandCounterIncrement(); } heap_close(relation, RowExclusiveLock); } static AclMode string_to_privilege(const char *privname) { if (strcmp(privname, "insert") == 0) return ACL_INSERT; if (strcmp(privname, "select") == 0) return ACL_SELECT; if (strcmp(privname, "update") == 0) return ACL_UPDATE; if (strcmp(privname, "delete") == 0) return ACL_DELETE; if (strcmp(privname, "truncate") == 0) return ACL_TRUNCATE; if (strcmp(privname, "references") == 0) return ACL_REFERENCES; if (strcmp(privname, "trigger") == 0) return ACL_TRIGGER; if (strcmp(privname, "execute") == 0) return ACL_EXECUTE; if (strcmp(privname, "usage") == 0) return ACL_USAGE; if (strcmp(privname, "create") == 0) return ACL_CREATE; if (strcmp(privname, "temporary") == 0) return ACL_CREATE_TEMP; if (strcmp(privname, "temp") == 0) return ACL_CREATE_TEMP; if (strcmp(privname, "connect") == 0) return ACL_CONNECT; if (strcmp(privname, "rule") == 0) return 0; /* ignore old RULE privileges */ ereport(ERROR, (errcode(ERRCODE_SYNTAX_ERROR), errmsg("unrecognized privilege type \"%s\"", privname))); return 0; /* appease compiler */ } static const char * privilege_to_string(AclMode privilege) { switch (privilege) { case ACL_INSERT: return "INSERT"; case ACL_SELECT: return "SELECT"; case ACL_UPDATE: return "UPDATE"; case ACL_DELETE: return "DELETE"; case ACL_TRUNCATE: return "TRUNCATE"; case ACL_REFERENCES: return "REFERENCES"; case ACL_TRIGGER: return "TRIGGER"; case ACL_EXECUTE: return "EXECUTE"; case ACL_USAGE: return "USAGE"; case ACL_CREATE: return "CREATE"; case ACL_CREATE_TEMP: return "TEMP"; case ACL_CONNECT: return "CONNECT"; default: elog(ERROR, "unrecognized privilege: %d", (int) privilege); } return NULL; /* appease compiler */ } /* * Standardized reporting of aclcheck permissions failures. * * Note: we do not double-quote the %s's below, because many callers * supply strings that might be already quoted. */ static const char *const no_priv_msg[MAX_ACL_KIND] = { /* ACL_KIND_COLUMN */ gettext_noop("permission denied for column %s"), /* ACL_KIND_CLASS */ gettext_noop("permission denied for relation %s"), /* ACL_KIND_SEQUENCE */ gettext_noop("permission denied for sequence %s"), /* ACL_KIND_DATABASE */ gettext_noop("permission denied for database %s"), /* ACL_KIND_PROC */ gettext_noop("permission denied for function %s"), /* ACL_KIND_OPER */ gettext_noop("permission denied for operator %s"), /* ACL_KIND_TYPE */ gettext_noop("permission denied for type %s"), /* ACL_KIND_LANGUAGE */ gettext_noop("permission denied for language %s"), /* ACL_KIND_LARGEOBJECT */ gettext_noop("permission denied for large object %s"), /* ACL_KIND_NAMESPACE */ gettext_noop("permission denied for schema %s"), /* ACL_KIND_OPCLASS */ gettext_noop("permission denied for operator class %s"), /* ACL_KIND_OPFAMILY */ gettext_noop("permission denied for operator family %s"), /* ACL_KIND_CONVERSION */ gettext_noop("permission denied for conversion %s"), /* ACL_KIND_TABLESPACE */ gettext_noop("permission denied for tablespace %s"), /* ACL_KIND_TSDICTIONARY */ gettext_noop("permission denied for text search dictionary %s"), /* ACL_KIND_TSCONFIGURATION */ gettext_noop("permission denied for text search configuration %s"), /* ACL_KIND_FDW */ gettext_noop("permission denied for foreign-data wrapper %s"), /* ACL_KIND_FOREIGN_SERVER */ gettext_noop("permission denied for foreign server %s") }; static const char *const not_owner_msg[MAX_ACL_KIND] = { /* ACL_KIND_COLUMN */ gettext_noop("must be owner of relation %s"), /* ACL_KIND_CLASS */ gettext_noop("must be owner of relation %s"), /* ACL_KIND_SEQUENCE */ gettext_noop("must be owner of sequence %s"), /* ACL_KIND_DATABASE */ gettext_noop("must be owner of database %s"), /* ACL_KIND_PROC */ gettext_noop("must be owner of function %s"), /* ACL_KIND_OPER */ gettext_noop("must be owner of operator %s"), /* ACL_KIND_TYPE */ gettext_noop("must be owner of type %s"), /* ACL_KIND_LANGUAGE */ gettext_noop("must be owner of language %s"), /* ACL_KIND_LARGEOBJECT */ gettext_noop("must be owner of large object %s"), /* ACL_KIND_NAMESPACE */ gettext_noop("must be owner of schema %s"), /* ACL_KIND_OPCLASS */ gettext_noop("must be owner of operator class %s"), /* ACL_KIND_OPFAMILY */ gettext_noop("must be owner of operator family %s"), /* ACL_KIND_CONVERSION */ gettext_noop("must be owner of conversion %s"), /* ACL_KIND_TABLESPACE */ gettext_noop("must be owner of tablespace %s"), /* ACL_KIND_TSDICTIONARY */ gettext_noop("must be owner of text search dictionary %s"), /* ACL_KIND_TSCONFIGURATION */ gettext_noop("must be owner of text search configuration %s"), /* ACL_KIND_FDW */ gettext_noop("must be owner of foreign-data wrapper %s"), /* ACL_KIND_FOREIGN_SERVER */ gettext_noop("must be owner of foreign server %s") }; void aclcheck_error(AclResult aclerr, AclObjectKind objectkind, const char *objectname) { switch (aclerr) { case ACLCHECK_OK: /* no error, so return to caller */ break; case ACLCHECK_NO_PRIV: ereport(ERROR, (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE), errmsg(no_priv_msg[objectkind], objectname))); break; case ACLCHECK_NOT_OWNER: ereport(ERROR, (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE), errmsg(not_owner_msg[objectkind], objectname))); break; default: elog(ERROR, "unrecognized AclResult: %d", (int) aclerr); break; } } void aclcheck_error_col(AclResult aclerr, AclObjectKind objectkind, const char *objectname, const char *colname) { switch (aclerr) { case ACLCHECK_OK: /* no error, so return to caller */ break; case ACLCHECK_NO_PRIV: ereport(ERROR, (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE), errmsg("permission denied for column \"%s\" of relation \"%s\"", colname, objectname))); break; case ACLCHECK_NOT_OWNER: /* relation msg is OK since columns don't have separate owners */ ereport(ERROR, (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE), errmsg(not_owner_msg[objectkind], objectname))); break; default: elog(ERROR, "unrecognized AclResult: %d", (int) aclerr); break; } } /* Check if given user has rolcatupdate privilege according to pg_authid */ static bool has_rolcatupdate(Oid roleid) { bool rolcatupdate; HeapTuple tuple; tuple = SearchSysCache1(AUTHOID, ObjectIdGetDatum(roleid)); if (!HeapTupleIsValid(tuple)) ereport(ERROR, (errcode(ERRCODE_UNDEFINED_OBJECT), errmsg("role with OID %u does not exist", roleid))); rolcatupdate = ((Form_pg_authid) GETSTRUCT(tuple))->rolcatupdate; ReleaseSysCache(tuple); return rolcatupdate; } /* * Relay for the various pg_*_mask routines depending on object kind */ static AclMode pg_aclmask(AclObjectKind objkind, Oid table_oid, AttrNumber attnum, Oid roleid, AclMode mask, AclMaskHow how) { switch (objkind) { case ACL_KIND_COLUMN: return pg_class_aclmask(table_oid, roleid, mask, how) | pg_attribute_aclmask(table_oid, attnum, roleid, mask, how); case ACL_KIND_CLASS: case ACL_KIND_SEQUENCE: return pg_class_aclmask(table_oid, roleid, mask, how); case ACL_KIND_DATABASE: return pg_database_aclmask(table_oid, roleid, mask, how); case ACL_KIND_PROC: return pg_proc_aclmask(table_oid, roleid, mask, how); case ACL_KIND_LANGUAGE: return pg_language_aclmask(table_oid, roleid, mask, how); case ACL_KIND_LARGEOBJECT: return pg_largeobject_aclmask_snapshot(table_oid, roleid, mask, how, SnapshotNow); case ACL_KIND_NAMESPACE: return pg_namespace_aclmask(table_oid, roleid, mask, how); case ACL_KIND_TABLESPACE: return pg_tablespace_aclmask(table_oid, roleid, mask, how); case ACL_KIND_FDW: return pg_foreign_data_wrapper_aclmask(table_oid, roleid, mask, how); case ACL_KIND_FOREIGN_SERVER: return pg_foreign_server_aclmask(table_oid, roleid, mask, how); default: elog(ERROR, "unrecognized objkind: %d", (int) objkind); /* not reached, but keep compiler quiet */ return ACL_NO_RIGHTS; } } /* **************************************************************** * Exported routines for examining a user's privileges for various objects * * See aclmask() for a description of the common API for these functions. * * Note: we give lookup failure the full ereport treatment because the * has_xxx_privilege() family of functions allow users to pass any random * OID to these functions. * **************************************************************** */ /* * Exported routine for examining a user's privileges for a column * * Note: this considers only privileges granted specifically on the column. * It is caller's responsibility to take relation-level privileges into account * as appropriate. (For the same reason, we have no special case for * superuser-ness here.) */ AclMode pg_attribute_aclmask(Oid table_oid, AttrNumber attnum, Oid roleid, AclMode mask, AclMaskHow how) { AclMode result; HeapTuple classTuple; HeapTuple attTuple; Form_pg_class classForm; Form_pg_attribute attributeForm; Datum aclDatum; bool isNull; Acl *acl; Oid ownerId; /* * First, get the column's ACL from its pg_attribute entry */ attTuple = SearchSysCache2(ATTNUM, ObjectIdGetDatum(table_oid), Int16GetDatum(attnum)); if (!HeapTupleIsValid(attTuple)) ereport(ERROR, (errcode(ERRCODE_UNDEFINED_COLUMN), errmsg("attribute %d of relation with OID %u does not exist", attnum, table_oid))); attributeForm = (Form_pg_attribute) GETSTRUCT(attTuple); /* Throw error on dropped columns, too */ if (attributeForm->attisdropped) ereport(ERROR, (errcode(ERRCODE_UNDEFINED_COLUMN), errmsg("attribute %d of relation with OID %u does not exist", attnum, table_oid))); aclDatum = SysCacheGetAttr(ATTNUM, attTuple, Anum_pg_attribute_attacl, &isNull); /* * Here we hard-wire knowledge that the default ACL for a column grants no * privileges, so that we can fall out quickly in the very common case * where attacl is null. */ if (isNull) { ReleaseSysCache(attTuple); return 0; } /* * Must get the relation's ownerId from pg_class. Since we already found * a pg_attribute entry, the only likely reason for this to fail is that a * concurrent DROP of the relation committed since then (which could only * happen if we don't have lock on the relation). We prefer to report "no * privileges" rather than failing in such a case, so as to avoid unwanted * failures in has_column_privilege() tests. */ classTuple = SearchSysCache1(RELOID, ObjectIdGetDatum(table_oid)); if (!HeapTupleIsValid(classTuple)) { ReleaseSysCache(attTuple); return 0; } classForm = (Form_pg_class) GETSTRUCT(classTuple); ownerId = classForm->relowner; ReleaseSysCache(classTuple); /* detoast column's ACL if necessary */ acl = DatumGetAclP(aclDatum); result = aclmask(acl, roleid, ownerId, mask, how); /* if we have a detoasted copy, free it */ if (acl && (Pointer) acl != DatumGetPointer(aclDatum)) pfree(acl); ReleaseSysCache(attTuple); return result; } /* * Exported routine for examining a user's privileges for a table */ AclMode pg_class_aclmask(Oid table_oid, Oid roleid, AclMode mask, AclMaskHow how) { AclMode result; HeapTuple tuple; Form_pg_class classForm; Datum aclDatum; bool isNull; Acl *acl; Oid ownerId; /* * Must get the relation's tuple from pg_class */ tuple = SearchSysCache1(RELOID, ObjectIdGetDatum(table_oid)); if (!HeapTupleIsValid(tuple)) ereport(ERROR, (errcode(ERRCODE_UNDEFINED_TABLE), errmsg("relation with OID %u does not exist", table_oid))); classForm = (Form_pg_class) GETSTRUCT(tuple); /* * Deny anyone permission to update a system catalog unless * pg_authid.rolcatupdate is set. (This is to let superusers protect * themselves from themselves.) Also allow it if allowSystemTableMods. * * As of 7.4 we have some updatable system views; those shouldn't be * protected in this way. Assume the view rules can take care of * themselves. ACL_USAGE is if we ever have system sequences. */ if ((mask & (ACL_INSERT | ACL_UPDATE | ACL_DELETE | ACL_TRUNCATE | ACL_USAGE)) && IsSystemClass(classForm) && classForm->relkind != RELKIND_VIEW && !has_rolcatupdate(roleid) && !allowSystemTableMods) { #ifdef ACLDEBUG elog(DEBUG2, "permission denied for system catalog update"); #endif mask &= ~(ACL_INSERT | ACL_UPDATE | ACL_DELETE | ACL_TRUNCATE | ACL_USAGE); } /* * Otherwise, superusers bypass all permission-checking. */ if (superuser_arg(roleid)) { #ifdef ACLDEBUG elog(DEBUG2, "OID %u is superuser, home free", roleid); #endif ReleaseSysCache(tuple); return mask; } /* * Normal case: get the relation's ACL from pg_class */ ownerId = classForm->relowner; aclDatum = SysCacheGetAttr(RELOID, tuple, Anum_pg_class_relacl, &isNull); if (isNull) { /* No ACL, so build default ACL */ acl = acldefault(classForm->relkind == RELKIND_SEQUENCE ? ACL_OBJECT_SEQUENCE : ACL_OBJECT_RELATION, ownerId); aclDatum = (Datum) 0; } else { /* detoast rel's ACL if necessary */ acl = DatumGetAclP(aclDatum); } result = aclmask(acl, roleid, ownerId, mask, how); /* if we have a detoasted copy, free it */ if (acl && (Pointer) acl != DatumGetPointer(aclDatum)) pfree(acl); ReleaseSysCache(tuple); return result; } /* * Exported routine for examining a user's privileges for a database */ AclMode pg_database_aclmask(Oid db_oid, Oid roleid, AclMode mask, AclMaskHow how) { AclMode result; HeapTuple tuple; Datum aclDatum; bool isNull; Acl *acl; Oid ownerId; /* Superusers bypass all permission checking. */ if (superuser_arg(roleid)) return mask; /* * Get the database's ACL from pg_database */ tuple = SearchSysCache1(DATABASEOID, ObjectIdGetDatum(db_oid)); if (!HeapTupleIsValid(tuple)) ereport(ERROR, (errcode(ERRCODE_UNDEFINED_DATABASE), errmsg("database with OID %u does not exist", db_oid))); ownerId = ((Form_pg_database) GETSTRUCT(tuple))->datdba; aclDatum = SysCacheGetAttr(DATABASEOID, tuple, Anum_pg_database_datacl, &isNull); if (isNull) { /* No ACL, so build default ACL */ acl = acldefault(ACL_OBJECT_DATABASE, ownerId); aclDatum = (Datum) 0; } else { /* detoast ACL if necessary */ acl = DatumGetAclP(aclDatum); } result = aclmask(acl, roleid, ownerId, mask, how); /* if we have a detoasted copy, free it */ if (acl && (Pointer) acl != DatumGetPointer(aclDatum)) pfree(acl); ReleaseSysCache(tuple); return result; } /* * Exported routine for examining a user's privileges for a function */ AclMode pg_proc_aclmask(Oid proc_oid, Oid roleid, AclMode mask, AclMaskHow how) { AclMode result; HeapTuple tuple; Datum aclDatum; bool isNull; Acl *acl; Oid ownerId; /* Superusers bypass all permission checking. */ if (superuser_arg(roleid)) return mask; /* * Get the function's ACL from pg_proc */ tuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(proc_oid)); if (!HeapTupleIsValid(tuple)) ereport(ERROR, (errcode(ERRCODE_UNDEFINED_FUNCTION), errmsg("function with OID %u does not exist", proc_oid))); ownerId = ((Form_pg_proc) GETSTRUCT(tuple))->proowner; aclDatum = SysCacheGetAttr(PROCOID, tuple, Anum_pg_proc_proacl, &isNull); if (isNull) { /* No ACL, so build default ACL */ acl = acldefault(ACL_OBJECT_FUNCTION, ownerId); aclDatum = (Datum) 0; } else { /* detoast ACL if necessary */ acl = DatumGetAclP(aclDatum); } result = aclmask(acl, roleid, ownerId, mask, how); /* if we have a detoasted copy, free it */ if (acl && (Pointer) acl != DatumGetPointer(aclDatum)) pfree(acl); ReleaseSysCache(tuple); return result; } /* * Exported routine for examining a user's privileges for a language */ AclMode pg_language_aclmask(Oid lang_oid, Oid roleid, AclMode mask, AclMaskHow how) { AclMode result; HeapTuple tuple; Datum aclDatum; bool isNull; Acl *acl; Oid ownerId; /* Superusers bypass all permission checking. */ if (superuser_arg(roleid)) return mask; /* * Get the language's ACL from pg_language */ tuple = SearchSysCache1(LANGOID, ObjectIdGetDatum(lang_oid)); if (!HeapTupleIsValid(tuple)) ereport(ERROR, (errcode(ERRCODE_UNDEFINED_OBJECT), errmsg("language with OID %u does not exist", lang_oid))); ownerId = ((Form_pg_language) GETSTRUCT(tuple))->lanowner; aclDatum = SysCacheGetAttr(LANGOID, tuple, Anum_pg_language_lanacl, &isNull); if (isNull) { /* No ACL, so build default ACL */ acl = acldefault(ACL_OBJECT_LANGUAGE, ownerId); aclDatum = (Datum) 0; } else { /* detoast ACL if necessary */ acl = DatumGetAclP(aclDatum); } result = aclmask(acl, roleid, ownerId, mask, how); /* if we have a detoasted copy, free it */ if (acl && (Pointer) acl != DatumGetPointer(aclDatum)) pfree(acl); ReleaseSysCache(tuple); return result; } /* * Exported routine for examining a user's privileges for a largeobject * * When a large object is opened for reading, it is opened relative to the * caller's snapshot, but when it is opened for writing, it is always relative * to SnapshotNow, as documented in doc/src/sgml/lobj.sgml. This function * takes a snapshot argument so that the permissions check can be made relative * to the same snapshot that will be used to read the underlying data. */ AclMode pg_largeobject_aclmask_snapshot(Oid lobj_oid, Oid roleid, AclMode mask, AclMaskHow how, Snapshot snapshot) { AclMode result; Relation pg_lo_meta; ScanKeyData entry[1]; SysScanDesc scan; HeapTuple tuple; Datum aclDatum; bool isNull; Acl *acl; Oid ownerId; /* Superusers bypass all permission checking. */ if (superuser_arg(roleid)) return mask; /* * Get the largeobject's ACL from pg_language_metadata */ pg_lo_meta = heap_open(LargeObjectMetadataRelationId, AccessShareLock); ScanKeyInit(&entry[0], ObjectIdAttributeNumber, BTEqualStrategyNumber, F_OIDEQ, ObjectIdGetDatum(lobj_oid)); scan = systable_beginscan(pg_lo_meta, LargeObjectMetadataOidIndexId, true, snapshot, 1, entry); tuple = systable_getnext(scan); if (!HeapTupleIsValid(tuple)) ereport(ERROR, (errcode(ERRCODE_UNDEFINED_OBJECT), errmsg("large object %u does not exist", lobj_oid))); ownerId = ((Form_pg_largeobject_metadata) GETSTRUCT(tuple))->lomowner; aclDatum = heap_getattr(tuple, Anum_pg_largeobject_metadata_lomacl, RelationGetDescr(pg_lo_meta), &isNull); if (isNull) { /* No ACL, so build default ACL */ acl = acldefault(ACL_OBJECT_LARGEOBJECT, ownerId); aclDatum = (Datum) 0; } else { /* detoast ACL if necessary */ acl = DatumGetAclP(aclDatum); } result = aclmask(acl, roleid, ownerId, mask, how); /* if we have a detoasted copy, free it */ if (acl && (Pointer) acl != DatumGetPointer(aclDatum)) pfree(acl); systable_endscan(scan); heap_close(pg_lo_meta, AccessShareLock); return result; } /* * Exported routine for examining a user's privileges for a namespace */ AclMode pg_namespace_aclmask(Oid nsp_oid, Oid roleid, AclMode mask, AclMaskHow how) { AclMode result; HeapTuple tuple; Datum aclDatum; bool isNull; Acl *acl; Oid ownerId; /* Superusers bypass all permission checking. */ if (superuser_arg(roleid)) return mask; /* * If we have been assigned this namespace as a temp namespace, check to * make sure we have CREATE TEMP permission on the database, and if so act * as though we have all standard (but not GRANT OPTION) permissions on * the namespace. If we don't have CREATE TEMP, act as though we have * only USAGE (and not CREATE) rights. * * This may seem redundant given the check in InitTempTableNamespace, but * it really isn't since current user ID may have changed since then. The * upshot of this behavior is that a SECURITY DEFINER function can create * temp tables that can then be accessed (if permission is granted) by * code in the same session that doesn't have permissions to create temp * tables. * * XXX Would it be safe to ereport a special error message as * InitTempTableNamespace does? Returning zero here means we'll get a * generic "permission denied for schema pg_temp_N" message, which is not * remarkably user-friendly. */ if (isTempNamespace(nsp_oid)) { if (pg_database_aclcheck(MyDatabaseId, roleid, ACL_CREATE_TEMP) == ACLCHECK_OK) return mask & ACL_ALL_RIGHTS_NAMESPACE; else return mask & ACL_USAGE; } /* * Get the schema's ACL from pg_namespace */ tuple = SearchSysCache1(NAMESPACEOID, ObjectIdGetDatum(nsp_oid)); if (!HeapTupleIsValid(tuple)) ereport(ERROR, (errcode(ERRCODE_UNDEFINED_SCHEMA), errmsg("schema with OID %u does not exist", nsp_oid))); ownerId = ((Form_pg_namespace) GETSTRUCT(tuple))->nspowner; aclDatum = SysCacheGetAttr(NAMESPACEOID, tuple, Anum_pg_namespace_nspacl, &isNull); if (isNull) { /* No ACL, so build default ACL */ acl = acldefault(ACL_OBJECT_NAMESPACE, ownerId); aclDatum = (Datum) 0; } else { /* detoast ACL if necessary */ acl = DatumGetAclP(aclDatum); } result = aclmask(acl, roleid, ownerId, mask, how); /* if we have a detoasted copy, free it */ if (acl && (Pointer) acl != DatumGetPointer(aclDatum)) pfree(acl); ReleaseSysCache(tuple); return result; } /* * Exported routine for examining a user's privileges for a tablespace */ AclMode pg_tablespace_aclmask(Oid spc_oid, Oid roleid, AclMode mask, AclMaskHow how) { AclMode result; HeapTuple tuple; Datum aclDatum; bool isNull; Acl *acl; Oid ownerId; /* Superusers bypass all permission checking. */ if (superuser_arg(roleid)) return mask; /* * Get the tablespace's ACL from pg_tablespace */ tuple = SearchSysCache1(TABLESPACEOID, ObjectIdGetDatum(spc_oid)); if (!HeapTupleIsValid(tuple)) ereport(ERROR, (errcode(ERRCODE_UNDEFINED_OBJECT), errmsg("tablespace with OID %u does not exist", spc_oid))); ownerId = ((Form_pg_tablespace) GETSTRUCT(tuple))->spcowner; aclDatum = SysCacheGetAttr(TABLESPACEOID, tuple, Anum_pg_tablespace_spcacl, &isNull); if (isNull) { /* No ACL, so build default ACL */ acl = acldefault(ACL_OBJECT_TABLESPACE, ownerId); aclDatum = (Datum) 0; } else { /* detoast ACL if necessary */ acl = DatumGetAclP(aclDatum); } result = aclmask(acl, roleid, ownerId, mask, how); /* if we have a detoasted copy, free it */ if (acl && (Pointer) acl != DatumGetPointer(aclDatum)) pfree(acl); ReleaseSysCache(tuple); return result; } /* * Exported routine for examining a user's privileges for a foreign * data wrapper */ AclMode pg_foreign_data_wrapper_aclmask(Oid fdw_oid, Oid roleid, AclMode mask, AclMaskHow how) { AclMode result; HeapTuple tuple; Datum aclDatum; bool isNull; Acl *acl; Oid ownerId; Form_pg_foreign_data_wrapper fdwForm; /* Bypass permission checks for superusers */ if (superuser_arg(roleid)) return mask; /* * Must get the FDW's tuple from pg_foreign_data_wrapper */ tuple = SearchSysCache1(FOREIGNDATAWRAPPEROID, ObjectIdGetDatum(fdw_oid)); if (!HeapTupleIsValid(tuple)) ereport(ERROR, (errmsg("foreign-data wrapper with OID %u does not exist", fdw_oid))); fdwForm = (Form_pg_foreign_data_wrapper) GETSTRUCT(tuple); /* * Normal case: get the FDW's ACL from pg_foreign_data_wrapper */ ownerId = fdwForm->fdwowner; aclDatum = SysCacheGetAttr(FOREIGNDATAWRAPPEROID, tuple, Anum_pg_foreign_data_wrapper_fdwacl, &isNull); if (isNull) { /* No ACL, so build default ACL */ acl = acldefault(ACL_OBJECT_FDW, ownerId); aclDatum = (Datum) 0; } else { /* detoast rel's ACL if necessary */ acl = DatumGetAclP(aclDatum); } result = aclmask(acl, roleid, ownerId, mask, how); /* if we have a detoasted copy, free it */ if (acl && (Pointer) acl != DatumGetPointer(aclDatum)) pfree(acl); ReleaseSysCache(tuple); return result; } /* * Exported routine for examining a user's privileges for a foreign * server. */ AclMode pg_foreign_server_aclmask(Oid srv_oid, Oid roleid, AclMode mask, AclMaskHow how) { AclMode result; HeapTuple tuple; Datum aclDatum; bool isNull; Acl *acl; Oid ownerId; Form_pg_foreign_server srvForm; /* Bypass permission checks for superusers */ if (superuser_arg(roleid)) return mask; /* * Must get the FDW's tuple from pg_foreign_data_wrapper */ tuple = SearchSysCache1(FOREIGNSERVEROID, ObjectIdGetDatum(srv_oid)); if (!HeapTupleIsValid(tuple)) ereport(ERROR, (errmsg("foreign server with OID %u does not exist", srv_oid))); srvForm = (Form_pg_foreign_server) GETSTRUCT(tuple); /* * Normal case: get the foreign server's ACL from pg_foreign_server */ ownerId = srvForm->srvowner; aclDatum = SysCacheGetAttr(FOREIGNSERVEROID, tuple, Anum_pg_foreign_server_srvacl, &isNull); if (isNull) { /* No ACL, so build default ACL */ acl = acldefault(ACL_OBJECT_FOREIGN_SERVER, ownerId); aclDatum = (Datum) 0; } else { /* detoast rel's ACL if necessary */ acl = DatumGetAclP(aclDatum); } result = aclmask(acl, roleid, ownerId, mask, how); /* if we have a detoasted copy, free it */ if (acl && (Pointer) acl != DatumGetPointer(aclDatum)) pfree(acl); ReleaseSysCache(tuple); return result; } /* * Exported routine for checking a user's access privileges to a column * * Returns ACLCHECK_OK if the user has any of the privileges identified by * 'mode'; otherwise returns a suitable error code (in practice, always * ACLCHECK_NO_PRIV). * * As with pg_attribute_aclmask, only privileges granted directly on the * column are considered here. */ AclResult pg_attribute_aclcheck(Oid table_oid, AttrNumber attnum, Oid roleid, AclMode mode) { if (pg_attribute_aclmask(table_oid, attnum, roleid, mode, ACLMASK_ANY) != 0) return ACLCHECK_OK; else return ACLCHECK_NO_PRIV; } /* * Exported routine for checking a user's access privileges to any/all columns * * If 'how' is ACLMASK_ANY, then returns ACLCHECK_OK if user has any of the * privileges identified by 'mode' on any non-dropped column in the relation; * otherwise returns a suitable error code (in practice, always * ACLCHECK_NO_PRIV). * * If 'how' is ACLMASK_ALL, then returns ACLCHECK_OK if user has any of the * privileges identified by 'mode' on each non-dropped column in the relation * (and there must be at least one such column); otherwise returns a suitable * error code (in practice, always ACLCHECK_NO_PRIV). * * As with pg_attribute_aclmask, only privileges granted directly on the * column(s) are considered here. * * Note: system columns are not considered here; there are cases where that * might be appropriate but there are also cases where it wouldn't. */ AclResult pg_attribute_aclcheck_all(Oid table_oid, Oid roleid, AclMode mode, AclMaskHow how) { AclResult result; HeapTuple classTuple; Form_pg_class classForm; AttrNumber nattrs; AttrNumber curr_att; /* * Must fetch pg_class row to check number of attributes. As in * pg_attribute_aclmask, we prefer to return "no privileges" instead of * throwing an error if we get any unexpected lookup errors. */ classTuple = SearchSysCache1(RELOID, ObjectIdGetDatum(table_oid)); if (!HeapTupleIsValid(classTuple)) return ACLCHECK_NO_PRIV; classForm = (Form_pg_class) GETSTRUCT(classTuple); nattrs = classForm->relnatts; ReleaseSysCache(classTuple); /* * Initialize result in case there are no non-dropped columns. We want to * report failure in such cases for either value of 'how'. */ result = ACLCHECK_NO_PRIV; for (curr_att = 1; curr_att <= nattrs; curr_att++) { HeapTuple attTuple; AclMode attmask; attTuple = SearchSysCache2(ATTNUM, ObjectIdGetDatum(table_oid), Int16GetDatum(curr_att)); if (!HeapTupleIsValid(attTuple)) continue; /* ignore dropped columns */ if (((Form_pg_attribute) GETSTRUCT(attTuple))->attisdropped) { ReleaseSysCache(attTuple); continue; } /* * Here we hard-wire knowledge that the default ACL for a column * grants no privileges, so that we can fall out quickly in the very * common case where attacl is null. */ if (heap_attisnull(attTuple, Anum_pg_attribute_attacl)) attmask = 0; else attmask = pg_attribute_aclmask(table_oid, curr_att, roleid, mode, ACLMASK_ANY); ReleaseSysCache(attTuple); if (attmask != 0) { result = ACLCHECK_OK; if (how == ACLMASK_ANY) break; /* succeed on any success */ } else { result = ACLCHECK_NO_PRIV; if (how == ACLMASK_ALL) break; /* fail on any failure */ } } return result; } /* * Exported routine for checking a user's access privileges to a table * * Returns ACLCHECK_OK if the user has any of the privileges identified by * 'mode'; otherwise returns a suitable error code (in practice, always * ACLCHECK_NO_PRIV). */ AclResult pg_class_aclcheck(Oid table_oid, Oid roleid, AclMode mode) { if (pg_class_aclmask(table_oid, roleid, mode, ACLMASK_ANY) != 0) return ACLCHECK_OK; else return ACLCHECK_NO_PRIV; } /* * Exported routine for checking a user's access privileges to a database */ AclResult pg_database_aclcheck(Oid db_oid, Oid roleid, AclMode mode) { if (pg_database_aclmask(db_oid, roleid, mode, ACLMASK_ANY) != 0) return ACLCHECK_OK; else return ACLCHECK_NO_PRIV; } /* * Exported routine for checking a user's access privileges to a function */ AclResult pg_proc_aclcheck(Oid proc_oid, Oid roleid, AclMode mode) { if (pg_proc_aclmask(proc_oid, roleid, mode, ACLMASK_ANY) != 0) return ACLCHECK_OK; else return ACLCHECK_NO_PRIV; } /* * Exported routine for checking a user's access privileges to a language */ AclResult pg_language_aclcheck(Oid lang_oid, Oid roleid, AclMode mode) { if (pg_language_aclmask(lang_oid, roleid, mode, ACLMASK_ANY) != 0) return ACLCHECK_OK; else return ACLCHECK_NO_PRIV; } /* * Exported routine for checking a user's access privileges to a largeobject */ AclResult pg_largeobject_aclcheck_snapshot(Oid lobj_oid, Oid roleid, AclMode mode, Snapshot snapshot) { if (pg_largeobject_aclmask_snapshot(lobj_oid, roleid, mode, ACLMASK_ANY, snapshot) != 0) return ACLCHECK_OK; else return ACLCHECK_NO_PRIV; } /* * Exported routine for checking a user's access privileges to a namespace */ AclResult pg_namespace_aclcheck(Oid nsp_oid, Oid roleid, AclMode mode) { if (pg_namespace_aclmask(nsp_oid, roleid, mode, ACLMASK_ANY) != 0) return ACLCHECK_OK; else return ACLCHECK_NO_PRIV; } /* * Exported routine for checking a user's access privileges to a tablespace */ AclResult pg_tablespace_aclcheck(Oid spc_oid, Oid roleid, AclMode mode) { if (pg_tablespace_aclmask(spc_oid, roleid, mode, ACLMASK_ANY) != 0) return ACLCHECK_OK; else return ACLCHECK_NO_PRIV; } /* * Exported routine for checking a user's access privileges to a foreign * data wrapper */ AclResult pg_foreign_data_wrapper_aclcheck(Oid fdw_oid, Oid roleid, AclMode mode) { if (pg_foreign_data_wrapper_aclmask(fdw_oid, roleid, mode, ACLMASK_ANY) != 0) return ACLCHECK_OK; else return ACLCHECK_NO_PRIV; } /* * Exported routine for checking a user's access privileges to a foreign * server */ AclResult pg_foreign_server_aclcheck(Oid srv_oid, Oid roleid, AclMode mode) { if (pg_foreign_server_aclmask(srv_oid, roleid, mode, ACLMASK_ANY) != 0) return ACLCHECK_OK; else return ACLCHECK_NO_PRIV; } /* * Ownership check for a relation (specified by OID). */ bool pg_class_ownercheck(Oid class_oid, Oid roleid) { HeapTuple tuple; Oid ownerId; /* Superusers bypass all permission checking. */ if (superuser_arg(roleid)) return true; tuple = SearchSysCache1(RELOID, ObjectIdGetDatum(class_oid)); if (!HeapTupleIsValid(tuple)) ereport(ERROR, (errcode(ERRCODE_UNDEFINED_TABLE), errmsg("relation with OID %u does not exist", class_oid))); ownerId = ((Form_pg_class) GETSTRUCT(tuple))->relowner; ReleaseSysCache(tuple); return has_privs_of_role(roleid, ownerId); } /* * Ownership check for a type (specified by OID). */ bool pg_type_ownercheck(Oid type_oid, Oid roleid) { HeapTuple tuple; Oid ownerId; /* Superusers bypass all permission checking. */ if (superuser_arg(roleid)) return true; tuple = SearchSysCache1(TYPEOID, ObjectIdGetDatum(type_oid)); if (!HeapTupleIsValid(tuple)) ereport(ERROR, (errcode(ERRCODE_UNDEFINED_OBJECT), errmsg("type with OID %u does not exist", type_oid))); ownerId = ((Form_pg_type) GETSTRUCT(tuple))->typowner; ReleaseSysCache(tuple); return has_privs_of_role(roleid, ownerId); } /* * Ownership check for an operator (specified by OID). */ bool pg_oper_ownercheck(Oid oper_oid, Oid roleid) { HeapTuple tuple; Oid ownerId; /* Superusers bypass all permission checking. */ if (superuser_arg(roleid)) return true; tuple = SearchSysCache1(OPEROID, ObjectIdGetDatum(oper_oid)); if (!HeapTupleIsValid(tuple)) ereport(ERROR, (errcode(ERRCODE_UNDEFINED_FUNCTION), errmsg("operator with OID %u does not exist", oper_oid))); ownerId = ((Form_pg_operator) GETSTRUCT(tuple))->oprowner; ReleaseSysCache(tuple); return has_privs_of_role(roleid, ownerId); } /* * Ownership check for a function (specified by OID). */ bool pg_proc_ownercheck(Oid proc_oid, Oid roleid) { HeapTuple tuple; Oid ownerId; /* Superusers bypass all permission checking. */ if (superuser_arg(roleid)) return true; tuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(proc_oid)); if (!HeapTupleIsValid(tuple)) ereport(ERROR, (errcode(ERRCODE_UNDEFINED_FUNCTION), errmsg("function with OID %u does not exist", proc_oid))); ownerId = ((Form_pg_proc) GETSTRUCT(tuple))->proowner; ReleaseSysCache(tuple); return has_privs_of_role(roleid, ownerId); } /* * Ownership check for a procedural language (specified by OID) */ bool pg_language_ownercheck(Oid lan_oid, Oid roleid) { HeapTuple tuple; Oid ownerId; /* Superusers bypass all permission checking. */ if (superuser_arg(roleid)) return true; tuple = SearchSysCache1(LANGOID, ObjectIdGetDatum(lan_oid)); if (!HeapTupleIsValid(tuple)) ereport(ERROR, (errcode(ERRCODE_UNDEFINED_FUNCTION), errmsg("language with OID %u does not exist", lan_oid))); ownerId = ((Form_pg_language) GETSTRUCT(tuple))->lanowner; ReleaseSysCache(tuple); return has_privs_of_role(roleid, ownerId); } /* * Ownership check for a largeobject (specified by OID) * * This is only used for operations like ALTER LARGE OBJECT that are always * relative to SnapshotNow. */ bool pg_largeobject_ownercheck(Oid lobj_oid, Oid roleid) { Relation pg_lo_meta; ScanKeyData entry[1]; SysScanDesc scan; HeapTuple tuple; Oid ownerId; /* Superusers bypass all permission checking. */ if (superuser_arg(roleid)) return true; /* There's no syscache for pg_largeobject_metadata */ pg_lo_meta = heap_open(LargeObjectMetadataRelationId, AccessShareLock); ScanKeyInit(&entry[0], ObjectIdAttributeNumber, BTEqualStrategyNumber, F_OIDEQ, ObjectIdGetDatum(lobj_oid)); scan = systable_beginscan(pg_lo_meta, LargeObjectMetadataOidIndexId, true, SnapshotNow, 1, entry); tuple = systable_getnext(scan); if (!HeapTupleIsValid(tuple)) ereport(ERROR, (errcode(ERRCODE_UNDEFINED_OBJECT), errmsg("large object %u does not exist", lobj_oid))); ownerId = ((Form_pg_largeobject_metadata) GETSTRUCT(tuple))->lomowner; systable_endscan(scan); heap_close(pg_lo_meta, AccessShareLock); return has_privs_of_role(roleid, ownerId); } /* * Ownership check for a namespace (specified by OID). */ bool pg_namespace_ownercheck(Oid nsp_oid, Oid roleid) { HeapTuple tuple; Oid ownerId; /* Superusers bypass all permission checking. */ if (superuser_arg(roleid)) return true; tuple = SearchSysCache1(NAMESPACEOID, ObjectIdGetDatum(nsp_oid)); if (!HeapTupleIsValid(tuple)) ereport(ERROR, (errcode(ERRCODE_UNDEFINED_SCHEMA), errmsg("schema with OID %u does not exist", nsp_oid))); ownerId = ((Form_pg_namespace) GETSTRUCT(tuple))->nspowner; ReleaseSysCache(tuple); return has_privs_of_role(roleid, ownerId); } /* * Ownership check for a tablespace (specified by OID). */ bool pg_tablespace_ownercheck(Oid spc_oid, Oid roleid) { HeapTuple spctuple; Oid spcowner; /* Superusers bypass all permission checking. */ if (superuser_arg(roleid)) return true; /* Search syscache for pg_tablespace */ spctuple = SearchSysCache1(TABLESPACEOID, ObjectIdGetDatum(spc_oid)); if (!HeapTupleIsValid(spctuple)) ereport(ERROR, (errcode(ERRCODE_UNDEFINED_OBJECT), errmsg("tablespace with OID %u does not exist", spc_oid))); spcowner = ((Form_pg_tablespace) GETSTRUCT(spctuple))->spcowner; ReleaseSysCache(spctuple); return has_privs_of_role(roleid, spcowner); } /* * Ownership check for an operator class (specified by OID). */ bool pg_opclass_ownercheck(Oid opc_oid, Oid roleid) { HeapTuple tuple; Oid ownerId; /* Superusers bypass all permission checking. */ if (superuser_arg(roleid)) return true; tuple = SearchSysCache1(CLAOID, ObjectIdGetDatum(opc_oid)); if (!HeapTupleIsValid(tuple)) ereport(ERROR, (errcode(ERRCODE_UNDEFINED_OBJECT), errmsg("operator class with OID %u does not exist", opc_oid))); ownerId = ((Form_pg_opclass) GETSTRUCT(tuple))->opcowner; ReleaseSysCache(tuple); return has_privs_of_role(roleid, ownerId); } /* * Ownership check for an operator family (specified by OID). */ bool pg_opfamily_ownercheck(Oid opf_oid, Oid roleid) { HeapTuple tuple; Oid ownerId; /* Superusers bypass all permission checking. */ if (superuser_arg(roleid)) return true; tuple = SearchSysCache1(OPFAMILYOID, ObjectIdGetDatum(opf_oid)); if (!HeapTupleIsValid(tuple)) ereport(ERROR, (errcode(ERRCODE_UNDEFINED_OBJECT), errmsg("operator family with OID %u does not exist", opf_oid))); ownerId = ((Form_pg_opfamily) GETSTRUCT(tuple))->opfowner; ReleaseSysCache(tuple); return has_privs_of_role(roleid, ownerId); } /* * Ownership check for a text search dictionary (specified by OID). */ bool pg_ts_dict_ownercheck(Oid dict_oid, Oid roleid) { HeapTuple tuple; Oid ownerId; /* Superusers bypass all permission checking. */ if (superuser_arg(roleid)) return true; tuple = SearchSysCache1(TSDICTOID, ObjectIdGetDatum(dict_oid)); if (!HeapTupleIsValid(tuple)) ereport(ERROR, (errcode(ERRCODE_UNDEFINED_OBJECT), errmsg("text search dictionary with OID %u does not exist", dict_oid))); ownerId = ((Form_pg_ts_dict) GETSTRUCT(tuple))->dictowner; ReleaseSysCache(tuple); return has_privs_of_role(roleid, ownerId); } /* * Ownership check for a text search configuration (specified by OID). */ bool pg_ts_config_ownercheck(Oid cfg_oid, Oid roleid) { HeapTuple tuple; Oid ownerId; /* Superusers bypass all permission checking. */ if (superuser_arg(roleid)) return true; tuple = SearchSysCache1(TSCONFIGOID, ObjectIdGetDatum(cfg_oid)); if (!HeapTupleIsValid(tuple)) ereport(ERROR, (errcode(ERRCODE_UNDEFINED_OBJECT), errmsg("text search configuration with OID %u does not exist", cfg_oid))); ownerId = ((Form_pg_ts_config) GETSTRUCT(tuple))->cfgowner; ReleaseSysCache(tuple); return has_privs_of_role(roleid, ownerId); } /* * Ownership check for a foreign server (specified by OID). */ bool pg_foreign_server_ownercheck(Oid srv_oid, Oid roleid) { HeapTuple tuple; Oid ownerId; /* Superusers bypass all permission checking. */ if (superuser_arg(roleid)) return true; tuple = SearchSysCache1(FOREIGNSERVEROID, ObjectIdGetDatum(srv_oid)); if (!HeapTupleIsValid(tuple)) ereport(ERROR, (errcode(ERRCODE_UNDEFINED_OBJECT), errmsg("foreign server with OID %u does not exist", srv_oid))); ownerId = ((Form_pg_foreign_server) GETSTRUCT(tuple))->srvowner; ReleaseSysCache(tuple); return has_privs_of_role(roleid, ownerId); } /* * Ownership check for a database (specified by OID). */ bool pg_database_ownercheck(Oid db_oid, Oid roleid) { HeapTuple tuple; Oid dba; /* Superusers bypass all permission checking. */ if (superuser_arg(roleid)) return true; tuple = SearchSysCache1(DATABASEOID, ObjectIdGetDatum(db_oid)); if (!HeapTupleIsValid(tuple)) ereport(ERROR, (errcode(ERRCODE_UNDEFINED_DATABASE), errmsg("database with OID %u does not exist", db_oid))); dba = ((Form_pg_database) GETSTRUCT(tuple))->datdba; ReleaseSysCache(tuple); return has_privs_of_role(roleid, dba); } /* * Ownership check for a conversion (specified by OID). */ bool pg_conversion_ownercheck(Oid conv_oid, Oid roleid) { HeapTuple tuple; Oid ownerId; /* Superusers bypass all permission checking. */ if (superuser_arg(roleid)) return true; tuple = SearchSysCache1(CONVOID, ObjectIdGetDatum(conv_oid)); if (!HeapTupleIsValid(tuple)) ereport(ERROR, (errcode(ERRCODE_UNDEFINED_OBJECT), errmsg("conversion with OID %u does not exist", conv_oid))); ownerId = ((Form_pg_conversion) GETSTRUCT(tuple))->conowner; ReleaseSysCache(tuple); return has_privs_of_role(roleid, ownerId); } /* * Fetch pg_default_acl entry for given role, namespace and object type * (object type must be given in pg_default_acl's encoding). * Returns NULL if no such entry. */ static Acl * get_default_acl_internal(Oid roleId, Oid nsp_oid, char objtype) { Acl *result = NULL; HeapTuple tuple; tuple = SearchSysCache3(DEFACLROLENSPOBJ, ObjectIdGetDatum(roleId), ObjectIdGetDatum(nsp_oid), CharGetDatum(objtype)); if (HeapTupleIsValid(tuple)) { Datum aclDatum; bool isNull; aclDatum = SysCacheGetAttr(DEFACLROLENSPOBJ, tuple, Anum_pg_default_acl_defaclacl, &isNull); if (!isNull) result = DatumGetAclPCopy(aclDatum); ReleaseSysCache(tuple); } return result; } /* * Get default permissions for newly created object within given schema * * Returns NULL if built-in system defaults should be used */ Acl * get_user_default_acl(GrantObjectType objtype, Oid ownerId, Oid nsp_oid) { Acl *result; Acl *glob_acl; Acl *schema_acl; Acl *def_acl; char defaclobjtype; /* * Use NULL during bootstrap, since pg_default_acl probably isn't there * yet. */ if (IsBootstrapProcessingMode()) return NULL; /* Check if object type is supported in pg_default_acl */ switch (objtype) { case ACL_OBJECT_RELATION: defaclobjtype = DEFACLOBJ_RELATION; break; case ACL_OBJECT_SEQUENCE: defaclobjtype = DEFACLOBJ_SEQUENCE; break; case ACL_OBJECT_FUNCTION: defaclobjtype = DEFACLOBJ_FUNCTION; break; default: return NULL; } /* Look up the relevant pg_default_acl entries */ glob_acl = get_default_acl_internal(ownerId, InvalidOid, defaclobjtype); schema_acl = get_default_acl_internal(ownerId, nsp_oid, defaclobjtype); /* Quick out if neither entry exists */ if (glob_acl == NULL && schema_acl == NULL) return NULL; /* We need to know the hard-wired default value, too */ def_acl = acldefault(objtype, ownerId); /* If there's no global entry, substitute the hard-wired default */ if (glob_acl == NULL) glob_acl = def_acl; /* Merge in any per-schema privileges */ result = aclmerge(glob_acl, schema_acl, ownerId); /* * For efficiency, we want to return NULL if the result equals default. * This requires sorting both arrays to get an accurate comparison. */ aclitemsort(result); aclitemsort(def_acl); if (aclequal(result, def_acl)) result = NULL; return result; }