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Various sepgsql corrections.

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KaiGai Kohei
This commit is contained in:
Robert Haas 2011-02-02 23:39:43 -05:00
parent 426227850b
commit c7689ee733
12 changed files with 127 additions and 49 deletions
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37
contrib/sepgsql/dml.c
View File

@ -14,6 +14,7 @@
#include "access/tupdesc.h"
#include "catalog/catalog.h"
#include "catalog/heap.h"
#include "catalog/dependency.h"
#include "catalog/pg_attribute.h"
#include "catalog/pg_class.h"
#include "catalog/pg_inherits_fn.h"
@ -151,6 +152,7 @@ check_relation_privileges(Oid relOid,
char relkind = get_rel_relkind(relOid);
char *scontext = sepgsql_get_client_label();
char *tcontext;
char *audit_name;
Bitmapset *columns;
int index;
bool result = true;
@ -183,6 +185,7 @@ check_relation_privileges(Oid relOid,
* Check permissions on the relation
*/
tcontext = sepgsql_get_label(RelationRelationId, relOid, 0);
audit_name = getObjectDescriptionOids(RelationRelationId, relOid);
switch (relkind)
{
case RELKIND_RELATION:
@ -190,10 +193,8 @@ check_relation_privileges(Oid relOid,
tcontext,
SEPG_CLASS_DB_TABLE,
required,
get_rel_name(relOid),
audit_name,
abort);
if (!result)
return false;
break;
case RELKIND_SEQUENCE:
@ -204,23 +205,31 @@ check_relation_privileges(Oid relOid,
tcontext,
SEPG_CLASS_DB_SEQUENCE,
SEPG_DB_SEQUENCE__GET_VALUE,
get_rel_name(relOid),
audit_name,
abort);
return result;
break;
case RELKIND_VIEW:
result = sepgsql_check_perms(scontext,
tcontext,
SEPG_CLASS_DB_VIEW,
SEPG_DB_VIEW__EXPAND,
get_rel_name(relOid),
audit_name,
abort);
return result;
break;
default:
/* nothing to be checked */
return true;
break;
}
pfree(tcontext);
pfree(audit_name);
/*
* Only columns owned by relations shall be checked
*/
if (relkind != RELKIND_RELATION)
return true;
/*
* Check permissions on the columns
@ -233,7 +242,7 @@ check_relation_privileges(Oid relOid,
{
AttrNumber attnum;
uint32 column_perms = 0;
char audit_name[NAMEDATALEN * 2 + 10];
ObjectAddress object;
if (bms_is_member(index, selected))
column_perms |= SEPG_DB_COLUMN__SELECT;
@ -250,8 +259,11 @@ check_relation_privileges(Oid relOid,
/* obtain column's permission */
attnum = index + FirstLowInvalidHeapAttributeNumber;
tcontext = sepgsql_get_label(RelationRelationId, relOid, attnum);
snprintf(audit_name, sizeof(audit_name), "%s.%s",
get_rel_name(relOid), get_attname(relOid, attnum));
object.classId = RelationRelationId;
object.objectId = relOid;
object.objectSubId = attnum;
audit_name = getObjectDescription(&object);
result = sepgsql_check_perms(scontext,
tcontext,
@ -259,6 +271,9 @@ check_relation_privileges(Oid relOid,
column_perms,
audit_name,
abort);
pfree(tcontext);
pfree(audit_name);
if (!result)
return result;
}

6
contrib/sepgsql/expected/dml.out
View File

@ -42,15 +42,15 @@ SELECT objtype, objname, label FROM pg_seclabels
table | t3 | system_u:object_r:sepgsql_fixed_table_t:s0
table | t4 | system_u:object_r:sepgsql_secret_table_t:s0
table | t5 | system_u:object_r:sepgsql_table_t:s0
column | t5.g | system_u:object_r:sepgsql_secret_table_t:s0
column | t5.f | system_u:object_r:sepgsql_ro_table_t:s0
column | t5.e | system_u:object_r:sepgsql_table_t:s0
column | t5.f | system_u:object_r:sepgsql_ro_table_t:s0
column | t5.g | system_u:object_r:sepgsql_secret_table_t:s0
(8 rows)
-- Hardwired Rules
UPDATE pg_attribute SET attisdropped = true
WHERE attrelid = 't5'::regclass AND attname = 'f'; -- failed
ERROR: selinux: hardwired security policy violation
ERROR: SELinux: hardwired security policy violation
--
-- Simple DML statements
--

4
contrib/sepgsql/expected/label.out
View File

@ -56,8 +56,8 @@ SELECT sepgsql_getcon(); -- confirm client privilege
SECURITY LABEL ON TABLE t1
IS 'system_u:object_r:sepgsql_ro_table_t:s0'; -- ok
SECURITY LABEL ON TABLE t2
IS 'invalid seuciryt context'; -- be failed
ERROR: invalid security label: "invalid seuciryt context"
IS 'invalid security context'; -- be failed
ERROR: SELinux: invalid security label: "invalid security context"
SECURITY LABEL ON COLUMN t2
IS 'system_u:object_r:sepgsql_ro_table_t:s0'; -- be failed
ERROR: improper relation name (too many dotted names):

2
contrib/sepgsql/expected/misc.out
View File

@ -2,4 +2,4 @@
-- Regression Test for Misc Permission Checks
--
LOAD '$libdir/sepgsql'; -- failed
ERROR: SELinux: LOAD is not allowed anyway.
ERROR: SELinux: LOAD is not permitted

4
contrib/sepgsql/hooks.c
View File

@ -91,7 +91,7 @@ sepgsql_client_auth(Port *port, int status)
if (getpeercon_raw(port->sock, &context) < 0)
ereport(FATAL,
(errcode(ERRCODE_INTERNAL_ERROR),
errmsg("SELinux: unable to get peer label")));
errmsg("SELinux: unable to get peer label: %m")));
sepgsql_set_client_label(context);
@ -414,7 +414,7 @@ _PG_init(void)
if (getcon_raw(&context) < 0)
ereport(ERROR,
(errcode(ERRCODE_INTERNAL_ERROR),
errmsg("SELinux: failed to get server security label")));
errmsg("SELinux: failed to get server security label: %m")));
sepgsql_set_client_label(context);
/* Security label provider hook */

89
contrib/sepgsql/label.c
View File

@ -81,7 +81,7 @@ sepgsql_get_label(Oid classId, Oid objectId, int32 subId)
if (security_get_initial_context_raw("unlabeled", &unlabeled) < 0)
ereport(ERROR,
(errcode(ERRCODE_INTERNAL_ERROR),
errmsg("SELinux: failed to get initial security label")));
errmsg("SELinux: failed to get initial security label: %m")));
PG_TRY();
{
label = pstrdup(unlabeled);
@ -184,7 +184,7 @@ sepgsql_mcstrans_in(PG_FUNCTION_ARGS)
&raw_label) < 0)
ereport(ERROR,
(errcode(ERRCODE_INTERNAL_ERROR),
errmsg("SELinux: could not translate security label")));
errmsg("SELinux: could not translate security label: %m")));
PG_TRY();
{
@ -224,7 +224,7 @@ sepgsql_mcstrans_out(PG_FUNCTION_ARGS)
&qual_label) < 0)
ereport(ERROR,
(errcode(ERRCODE_INTERNAL_ERROR),
errmsg("SELinux: could not translate security label")));
errmsg("SELinux: could not translate security label: %m")));
PG_TRY();
{
@ -241,6 +241,51 @@ sepgsql_mcstrans_out(PG_FUNCTION_ARGS)
PG_RETURN_TEXT_P(cstring_to_text(result));
}
/*
* quote_object_names
*
* It tries to quote the supplied identifiers
*/
static char *
quote_object_name(const char *src1, const char *src2,
const char *src3, const char *src4)
{
StringInfoData result;
const char *temp;
initStringInfo(&result);
if (src1)
{
temp = quote_identifier(src1);
appendStringInfo(&result, "%s", temp);
if (src1 != temp)
pfree((void *)temp);
}
if (src2)
{
temp = quote_identifier(src2);
appendStringInfo(&result, ".%s", temp);
if (src2 != temp)
pfree((void *)temp);
}
if (src3)
{
temp = quote_identifier(src3);
appendStringInfo(&result, ".%s", temp);
if (src3 != temp)
pfree((void *)temp);
}
if (src4)
{
temp = quote_identifier(src4);
appendStringInfo(&result, ".%s", temp);
if (src4 != temp)
pfree((void *)temp);
}
return result.data;
}
/*
* exec_object_restorecon
*
@ -273,7 +318,7 @@ exec_object_restorecon(struct selabel_handle *sehnd, Oid catalogId)
Form_pg_class relForm;
Form_pg_attribute attForm;
Form_pg_proc proForm;
char objname[NAMEDATALEN * 4 + 10];
char *objname;
int objtype = 1234;
ObjectAddress object;
security_context_t context;
@ -288,8 +333,10 @@ exec_object_restorecon(struct selabel_handle *sehnd, Oid catalogId)
nspForm = (Form_pg_namespace) GETSTRUCT(tuple);
objtype = SELABEL_DB_SCHEMA;
snprintf(objname, sizeof(objname), "%s.%s",
database_name, NameStr(nspForm->nspname));
objname = quote_object_name(database_name,
NameStr(nspForm->nspname),
NULL, NULL);
object.classId = NamespaceRelationId;
object.objectId = HeapTupleGetOid(tuple);
@ -309,9 +356,10 @@ exec_object_restorecon(struct selabel_handle *sehnd, Oid catalogId)
continue; /* no need to assign security label */
namespace_name = get_namespace_name(relForm->relnamespace);
snprintf(objname, sizeof(objname), "%s.%s.%s",
database_name, namespace_name,
NameStr(relForm->relname));
objname = quote_object_name(database_name,
namespace_name,
NameStr(relForm->relname),
NULL);
pfree(namespace_name);
object.classId = RelationRelationId;
@ -330,11 +378,12 @@ exec_object_restorecon(struct selabel_handle *sehnd, Oid catalogId)
namespace_id = get_rel_namespace(attForm->attrelid);
namespace_name = get_namespace_name(namespace_id);
relation_name = get_rel_name(attForm->attrelid);
snprintf(objname, sizeof(objname), "%s.%s.%s.%s",
database_name, namespace_name,
relation_name, NameStr(attForm->attname));
pfree(relation_name);
objname = quote_object_name(database_name,
namespace_name,
relation_name,
NameStr(attForm->attname));
pfree(namespace_name);
pfree(relation_name);
object.classId = RelationRelationId;
object.objectId = attForm->attrelid;
@ -347,9 +396,10 @@ exec_object_restorecon(struct selabel_handle *sehnd, Oid catalogId)
objtype = SELABEL_DB_PROCEDURE;
namespace_name = get_namespace_name(proForm->pronamespace);
snprintf(objname, sizeof(objname), "%s.%s.%s",
database_name, namespace_name,
NameStr(proForm->proname));
objname = quote_object_name(database_name,
namespace_name,
NameStr(proForm->proname),
NULL);
pfree(namespace_name);
object.classId = ProcedureRelationId;
@ -359,6 +409,7 @@ exec_object_restorecon(struct selabel_handle *sehnd, Oid catalogId)
default:
elog(ERROR, "unexpected catalog id: %u", catalogId);
objname = NULL; /* for compiler quiet */
break;
}
@ -389,7 +440,9 @@ exec_object_restorecon(struct selabel_handle *sehnd, Oid catalogId)
else
ereport(ERROR,
(errcode(ERRCODE_INTERNAL_ERROR),
errmsg("SELinux: could not determine initial security label for %s (type=%d)", objname, objtype)));
errmsg("SELinux: could not determine initial security label for %s (type=%d): %m", objname, objtype)));
pfree(objname);
}
systable_endscan(sscan);
@ -449,7 +502,7 @@ sepgsql_restorecon(PG_FUNCTION_ARGS)
if (!sehnd)
ereport(ERROR,
(errcode(ERRCODE_INTERNAL_ERROR),
errmsg("SELinux: failed to initialize labeling handle")));
errmsg("SELinux: failed to initialize labeling handle: %m")));
PG_TRY();
{
/*

0
contrib/sepgsql/launcher Normal file → Executable file
View File

3
contrib/sepgsql/proc.c
View File

@ -13,6 +13,7 @@
#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"
@ -99,7 +100,7 @@ sepgsql_proc_relabel(Oid functionId, const char *seclabel)
char *tcontext;
char *audit_name;
audit_name = get_func_name(functionId);
audit_name = getObjectDescriptionOids(ProcedureRelationId, functionId);
/*
* check db_procedure:{setattr relabelfrom} permission

20
contrib/sepgsql/relation.c
View File

@ -14,6 +14,7 @@
#include "access/heapam.h"
#include "access/sysattr.h"
#include "catalog/indexing.h"
#include "catalog/dependency.h"
#include "catalog/pg_attribute.h"
#include "catalog/pg_class.h"
#include "catalog/pg_namespace.h"
@ -79,15 +80,18 @@ sepgsql_attribute_relabel(Oid relOid, AttrNumber attnum,
{
char *scontext = sepgsql_get_client_label();
char *tcontext;
char audit_name[NAMEDATALEN * 2 + 10];
char *audit_name;
ObjectAddress object;
if (get_rel_relkind(relOid) != RELKIND_RELATION)
ereport(ERROR,
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
errmsg("cannot set security label on non-regular columns")));
snprintf(audit_name, sizeof(audit_name), "%s.%s",
get_rel_name(relOid), get_attname(relOid, attnum));
object.classId = RelationRelationId;
object.objectId = relOid;
object.objectSubId = attnum;
audit_name = getObjectDescription(&object);
/*
* check db_column:{setattr relabelfrom} permission
@ -100,7 +104,6 @@ sepgsql_attribute_relabel(Oid relOid, AttrNumber attnum,
SEPG_DB_COLUMN__RELABELFROM,
audit_name,
true);
pfree(tcontext);
/*
* check db_column:{relabelto} permission
@ -111,6 +114,9 @@ sepgsql_attribute_relabel(Oid relOid, AttrNumber attnum,
SEPG_DB_PROCEDURE__RELABELTO,
audit_name,
true);
pfree(tcontext);
pfree(audit_name);
}
/*
@ -239,7 +245,7 @@ sepgsql_relation_relabel(Oid relOid, const char *seclabel)
errmsg("cannot set security labels on relations except "
"for tables, sequences or views")));
audit_name = get_rel_name(relOid);
audit_name = getObjectDescriptionOids(RelationRelationId, relOid);
/*
* check db_xxx:{setattr relabelfrom} permission
@ -253,7 +259,6 @@ sepgsql_relation_relabel(Oid relOid, const char *seclabel)
SEPG_DB_TABLE__RELABELFROM,
audit_name,
true);
pfree(tcontext);
/*
* check db_xxx:{relabelto} permission
@ -264,4 +269,7 @@ sepgsql_relation_relabel(Oid relOid, const char *seclabel)
SEPG_DB_TABLE__RELABELTO,
audit_name,
true);
pfree(tcontext);
pfree(audit_name);
}

3
contrib/sepgsql/schema.c
View File

@ -10,6 +10,7 @@
*/
#include "postgres.h"
#include "catalog/dependency.h"
#include "catalog/pg_namespace.h"
#include "commands/seclabel.h"
#include "utils/lsyscache.h"
@ -68,7 +69,7 @@ sepgsql_schema_relabel(Oid namespaceId, const char *seclabel)
char *tcontext;
char *audit_name;
audit_name = get_namespace_name(namespaceId);
audit_name = getObjectDescriptionOids(NamespaceRelationId, namespaceId);
/*
* check db_schema:{setattr relabelfrom} permission

6
contrib/sepgsql/selinux.c
View File

@ -396,7 +396,7 @@ sepgsql_audit_log(bool denied,
appendStringInfo(&buf, " scontext=%s tcontext=%s tclass=%s",
scontext, tcontext, class_name);
if (audit_name)
appendStringInfo(&buf, " name=%s", audit_name);
appendStringInfo(&buf, " name=\"%s\"", audit_name);
ereport(LOG, (errmsg("SELinux: %s", buf.data)));
}
@ -459,7 +459,7 @@ sepgsql_compute_avd(const char *scontext,
ereport(ERROR,
(errcode(ERRCODE_INTERNAL_ERROR),
errmsg("SELinux could not compute av_decision: "
"scontext=%s tcontext=%s tclass=%s",
"scontext=%s tcontext=%s tclass=%s: %m",
scontext, tcontext, tclass_name)));
/*
@ -545,7 +545,7 @@ sepgsql_compute_create(const char *scontext,
ereport(ERROR,
(errcode(ERRCODE_INTERNAL_ERROR),
errmsg("SELinux could not compute a new context: "
"scontext=%s tcontext=%s tclass=%s",
"scontext=%s tcontext=%s tclass=%s: %m",
scontext, tcontext, tclass_name)));
/*

2
contrib/sepgsql/sql/label.sql
View File

@ -46,7 +46,7 @@ SELECT objtype, objname, label FROM pg_seclabels
SECURITY LABEL ON TABLE t1
IS 'system_u:object_r:sepgsql_ro_table_t:s0'; -- ok
SECURITY LABEL ON TABLE t2
IS 'invalid seuciryt context'; -- be failed
IS 'invalid security context'; -- be failed
SECURITY LABEL ON COLUMN t2
IS 'system_u:object_r:sepgsql_ro_table_t:s0'; -- be failed
SECURITY LABEL ON COLUMN t2.b