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Teach sepgsql about database labels.

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This is still a bit of a hack, but it's better than the old way, for sure.

KaiGai Kohei, with one change by me to make it compile
This commit is contained in:
Robert Haas
2011-09-23 17:09:34 -04:00
parent a5e94ea52b
commit 291873c155
6 changed files with 128 additions and 13 deletions
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88
contrib/sepgsql/database.c Normal file
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/* -------------------------------------------------------------------------
*
* contrib/sepgsql/database.c
*
* Routines corresponding to database objects
*
* Copyright (c) 2010-2011, PostgreSQL Global Development Group
*
* -------------------------------------------------------------------------
*/
#include "postgres.h"
#include "catalog/dependency.h"
#include "catalog/pg_database.h"
#include "commands/seclabel.h"
#include "sepgsql.h"
void
sepgsql_database_post_create(Oid databaseId)
{
char *scontext = sepgsql_get_client_label();
char *tcontext;
char *ncontext;
ObjectAddress object;
/*
* Compute a default security label of the newly created database
* based on a pair of security label of client and source database.
*
* XXX - Right now, this logic uses "template1" as its source, because
* here is no way to know the Oid of source database.
*/
object.classId = DatabaseRelationId;
object.objectId = TemplateDbOid;
object.objectSubId = 0;
tcontext = GetSecurityLabel(&object, SEPGSQL_LABEL_TAG);
ncontext = sepgsql_compute_create(scontext, tcontext,
SEPG_CLASS_DB_DATABASE);
/*
* Assign the default security label on the new database
*/
object.classId = DatabaseRelationId;
object.objectId = databaseId;
object.objectSubId = 0;
SetSecurityLabel(&object, SEPGSQL_LABEL_TAG, ncontext);
pfree(ncontext);
pfree(tcontext);
}
/*
* sepgsql_database_relabel
*
* It checks privileges to relabel the supplied database with the `seclabel'
*/
void
sepgsql_database_relabel(Oid databaseId, const char *seclabel)
{
ObjectAddress object;
char *audit_name;
object.classId = DatabaseRelationId;
object.objectId = databaseId;
object.objectSubId = 0;
audit_name = getObjectDescription(&object);
/*
* check db_database:{setattr relabelfrom} permission
*/
sepgsql_avc_check_perms(&object,
SEPG_CLASS_DB_DATABASE,
SEPG_DB_DATABASE__SETATTR |
SEPG_DB_DATABASE__RELABELFROM,
audit_name,
true);
/*
* check db_database:{relabelto} permission
*/
sepgsql_avc_check_perms_label(seclabel,
SEPG_CLASS_DB_DATABASE,
SEPG_DB_DATABASE__RELABELTO,
audit_name,
true);
pfree(audit_name);
}