mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-08-21 21:43:22 +02:00
160 lines
4.0 KiB
C
160 lines
4.0 KiB
C
/* -------------------------------------------------------------------------
|
|
*
|
|
* contrib/sepgsql/proc.c
|
|
*
|
|
* Routines corresponding to procedure objects
|
|
*
|
|
* Copyright (c) 2010-2011, PostgreSQL Global Development Group
|
|
*
|
|
* -------------------------------------------------------------------------
|
|
*/
|
|
#include "postgres.h"
|
|
|
|
#include "access/genam.h"
|
|
#include "access/heapam.h"
|
|
#include "access/sysattr.h"
|
|
#include "catalog/dependency.h"
|
|
#include "catalog/indexing.h"
|
|
#include "catalog/pg_namespace.h"
|
|
#include "catalog/pg_proc.h"
|
|
#include "commands/seclabel.h"
|
|
#include "utils/fmgroids.h"
|
|
#include "utils/lsyscache.h"
|
|
#include "utils/tqual.h"
|
|
|
|
#include "sepgsql.h"
|
|
|
|
/*
|
|
* sepgsql_proc_post_create
|
|
*
|
|
* This routine assigns a default security label on a newly defined
|
|
* procedure.
|
|
*/
|
|
void
|
|
sepgsql_proc_post_create(Oid functionId)
|
|
{
|
|
Relation rel;
|
|
ScanKeyData skey;
|
|
SysScanDesc sscan;
|
|
HeapTuple tuple;
|
|
Oid namespaceId;
|
|
ObjectAddress object;
|
|
char *scontext;
|
|
char *tcontext;
|
|
char *ncontext;
|
|
|
|
/*
|
|
* Fetch namespace of the new procedure. Because pg_proc entry is not
|
|
* visible right now, we need to scan the catalog using SnapshotSelf.
|
|
*/
|
|
rel = heap_open(ProcedureRelationId, AccessShareLock);
|
|
|
|
ScanKeyInit(&skey,
|
|
ObjectIdAttributeNumber,
|
|
BTEqualStrategyNumber, F_OIDEQ,
|
|
ObjectIdGetDatum(functionId));
|
|
|
|
sscan = systable_beginscan(rel, ProcedureOidIndexId, true,
|
|
SnapshotSelf, 1, &skey);
|
|
|
|
tuple = systable_getnext(sscan);
|
|
if (!HeapTupleIsValid(tuple))
|
|
elog(ERROR, "catalog lookup failed for proc %u", functionId);
|
|
|
|
namespaceId = ((Form_pg_proc) GETSTRUCT(tuple))->pronamespace;
|
|
|
|
systable_endscan(sscan);
|
|
heap_close(rel, AccessShareLock);
|
|
|
|
/*
|
|
* Compute a default security label when we create a new procedure object
|
|
* under the specified namespace.
|
|
*/
|
|
scontext = sepgsql_get_client_label();
|
|
tcontext = sepgsql_get_label(NamespaceRelationId, namespaceId, 0);
|
|
ncontext = sepgsql_compute_create(scontext, tcontext,
|
|
SEPG_CLASS_DB_PROCEDURE);
|
|
|
|
/*
|
|
* Assign the default security label on a new procedure
|
|
*/
|
|
object.classId = ProcedureRelationId;
|
|
object.objectId = functionId;
|
|
object.objectSubId = 0;
|
|
SetSecurityLabel(&object, SEPGSQL_LABEL_TAG, ncontext);
|
|
|
|
pfree(tcontext);
|
|
pfree(ncontext);
|
|
}
|
|
|
|
/*
|
|
* sepgsql_proc_relabel
|
|
*
|
|
* It checks privileges to relabel the supplied function
|
|
* by the `seclabel'.
|
|
*/
|
|
void
|
|
sepgsql_proc_relabel(Oid functionId, const char *seclabel)
|
|
{
|
|
char *scontext = sepgsql_get_client_label();
|
|
char *tcontext;
|
|
char *audit_name;
|
|
|
|
audit_name = getObjectDescriptionOids(ProcedureRelationId, functionId);
|
|
|
|
/*
|
|
* check db_procedure:{setattr relabelfrom} permission
|
|
*/
|
|
tcontext = sepgsql_get_label(ProcedureRelationId, functionId, 0);
|
|
sepgsql_check_perms(scontext,
|
|
tcontext,
|
|
SEPG_CLASS_DB_PROCEDURE,
|
|
SEPG_DB_PROCEDURE__SETATTR |
|
|
SEPG_DB_PROCEDURE__RELABELFROM,
|
|
audit_name,
|
|
true);
|
|
pfree(tcontext);
|
|
|
|
/*
|
|
* check db_procedure:{relabelto} permission
|
|
*/
|
|
sepgsql_check_perms(scontext,
|
|
seclabel,
|
|
SEPG_CLASS_DB_PROCEDURE,
|
|
SEPG_DB_PROCEDURE__RELABELTO,
|
|
audit_name,
|
|
true);
|
|
pfree(audit_name);
|
|
}
|
|
|
|
/*
|
|
* sepgsql_proc_get_domtrans
|
|
*
|
|
* It computes security label of the client that shall be applied when
|
|
* the current client invokes the supplied function.
|
|
* This computed label is either same or different from the current one.
|
|
* If security policy informed the function is a trusted-procedure,
|
|
* we need to switch security label of the client during execution of
|
|
* the function.
|
|
*
|
|
* Also note that the translated label shall be allocated using palloc().
|
|
* So, need to switch memory context, if you want to hold the string in
|
|
* someone except for CurrentMemoryContext.
|
|
*/
|
|
char *
|
|
sepgsql_proc_get_domtrans(Oid functionId)
|
|
{
|
|
char *scontext = sepgsql_get_client_label();
|
|
char *tcontext;
|
|
char *ncontext;
|
|
|
|
tcontext = sepgsql_get_label(ProcedureRelationId, functionId, 0);
|
|
|
|
ncontext = sepgsql_compute_create(scontext,
|
|
tcontext,
|
|
SEPG_CLASS_PROCESS);
|
|
pfree(tcontext);
|
|
|
|
return ncontext;
|
|
}
|