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Commit523176c

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sepgsql_setcon().
This is intended as infrastructure to allow sepgsql to cooperate withconnection pooling software, by allowing the effective security labelto be set for each new connection.KaiGai Kohei, reviewed by Yeb Havinga.
1 parenteb990a2 commit523176c

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8 files changed

+931
-23
lines changed

8 files changed

+931
-23
lines changed

‎contrib/sepgsql/expected/label.out‎

Lines changed: 346 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -26,7 +26,33 @@ CREATE FUNCTION f4 () RETURNS text
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AS 'SELECT sepgsql_getcon()'
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LANGUAGE sql;
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SECURITY LABEL ON FUNCTION f4()
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IS 'system_u:object_r:sepgsql_nosuch_trusted_proc_exec_t:s0';
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CREATE FUNCTION f5 (text) RETURNS bool
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AS 'SELECT sepgsql_setcon($1)'
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LANGUAGE sql;
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SECURITY LABEL ON FUNCTION f5(text)
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IS 'system_u:object_r:sepgsql_regtest_trusted_proc_exec_t:s0';
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CREATE TABLE auth_tbl(uname text, credential text, label text);
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INSERT INTO auth_tbl
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VALUES ('foo', 'acbd18db4cc2f85cedef654fccc4a4d8', 'sepgsql_regtest_foo_t:s0'),
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('var', 'b2145aac704ce76dbe1ac7adac535b23', 'sepgsql_regtest_var_t:s0'),
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('baz', 'b2145aac704ce76dbe1ac7adac535b23', 'sepgsql_regtest_baz_t:s0');
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SECURITY LABEL ON TABLE auth_tbl
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IS 'system_u:object_r:sepgsql_secret_table_t:s0';
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CREATE FUNCTION auth_func(text, text) RETURNS bool
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LANGUAGE sql
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AS 'SELECT sepgsql_setcon(regexp_replace(sepgsql_getcon(), ''_r:.*$'', ''_r:'' || label))
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FROM auth_tbl WHERE uname = $1 AND credential = $2';
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SECURITY LABEL ON FUNCTION auth_func(text,text)
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IS 'system_u:object_r:sepgsql_regtest_trusted_proc_exec_t:s0';
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CREATE TABLE foo_tbl(a int, b text);
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INSERT INTO foo_tbl VALUES (1, 'aaa'), (2,'bbb'), (3,'ccc'), (4,'ddd');
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SECURITY LABEL ON TABLE foo_tbl
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IS 'system_u:object_r:sepgsql_regtest_foo_table_t:s0';
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CREATE TABLE var_tbl(x int, y text);
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INSERT INTO var_tbl VALUES (2,'xxx'), (3,'yyy'), (4,'zzz'), (5,'xyz');
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SECURITY LABEL ON TABLE var_tbl
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IS 'system_u:object_r:sepgsql_regtest_var_table_t:s0';
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--
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-- Tests for default labeling behavior
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--
@@ -99,6 +125,325 @@ SELECT sepgsql_getcon();-- client's label must be restored
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unconfined_u:unconfined_r:sepgsql_regtest_user_t:s0
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(1 row)
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--
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-- Test for Dynamic Domain Transition
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--
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-- validation of transaction aware dynamic-transition
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SELECT sepgsql_getcon();-- confirm client privilege
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sepgsql_getcon
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--------------------------------------------------
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unconfined_u:unconfined_r:unconfined_t:s0:c0.c25
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(1 row)
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SELECT sepgsql_setcon('unconfined_u:unconfined_r:unconfined_t:s0:c0.c15');
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sepgsql_setcon
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----------------
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t
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(1 row)
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SELECT sepgsql_getcon();
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sepgsql_getcon
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--------------------------------------------------
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unconfined_u:unconfined_r:unconfined_t:s0:c0.c15
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(1 row)
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SELECT sepgsql_setcon(NULL);-- failed to reset
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ERROR: SELinux: security policy violation
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SELECT sepgsql_getcon();
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sepgsql_getcon
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--------------------------------------------------
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unconfined_u:unconfined_r:unconfined_t:s0:c0.c15
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(1 row)
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BEGIN;
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SELECT sepgsql_setcon('unconfined_u:unconfined_r:unconfined_t:s0:c0.c12');
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sepgsql_setcon
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----------------
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t
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(1 row)
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SELECT sepgsql_getcon();
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sepgsql_getcon
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--------------------------------------------------
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unconfined_u:unconfined_r:unconfined_t:s0:c0.c12
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(1 row)
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SAVEPOINT svpt_1;
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SELECT sepgsql_setcon('unconfined_u:unconfined_r:unconfined_t:s0:c0.c9');
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sepgsql_setcon
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----------------
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t
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(1 row)
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SELECT sepgsql_getcon();
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sepgsql_getcon
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-------------------------------------------------
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unconfined_u:unconfined_r:unconfined_t:s0:c0.c9
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(1 row)
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SAVEPOINT svpt_2;
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SELECT sepgsql_setcon('unconfined_u:unconfined_r:unconfined_t:s0:c0.c6');
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sepgsql_setcon
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----------------
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t
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(1 row)
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SELECT sepgsql_getcon();
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sepgsql_getcon
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-------------------------------------------------
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unconfined_u:unconfined_r:unconfined_t:s0:c0.c6
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(1 row)
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SAVEPOINT svpt_3;
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SELECT sepgsql_setcon('unconfined_u:unconfined_r:unconfined_t:s0:c0.c3');
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sepgsql_setcon
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----------------
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t
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(1 row)
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SELECT sepgsql_getcon();
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sepgsql_getcon
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-------------------------------------------------
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unconfined_u:unconfined_r:unconfined_t:s0:c0.c3
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(1 row)
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ROLLBACK TO SAVEPOINT svpt_2;
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SELECT sepgsql_getcon();-- should be 's0:c0.c9'
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sepgsql_getcon
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-------------------------------------------------
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unconfined_u:unconfined_r:unconfined_t:s0:c0.c9
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(1 row)
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ROLLBACK TO SAVEPOINT svpt_1;
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SELECT sepgsql_getcon();-- should be 's0:c0.c12'
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sepgsql_getcon
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--------------------------------------------------
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unconfined_u:unconfined_r:unconfined_t:s0:c0.c12
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(1 row)
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ABORT;
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SELECT sepgsql_getcon();-- should be 's0:c0.c15'
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sepgsql_getcon
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--------------------------------------------------
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unconfined_u:unconfined_r:unconfined_t:s0:c0.c15
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(1 row)
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BEGIN;
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SELECT sepgsql_setcon('unconfined_u:unconfined_r:unconfined_t:s0:c0.c8');
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sepgsql_setcon
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----------------
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t
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(1 row)
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SELECT sepgsql_getcon();
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sepgsql_getcon
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-------------------------------------------------
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unconfined_u:unconfined_r:unconfined_t:s0:c0.c8
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(1 row)
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SAVEPOINT svpt_1;
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SELECT sepgsql_setcon('unconfined_u:unconfined_r:unconfined_t:s0:c0.c4');
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sepgsql_setcon
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----------------
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t
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(1 row)
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SELECT sepgsql_getcon();
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sepgsql_getcon
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-------------------------------------------------
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unconfined_u:unconfined_r:unconfined_t:s0:c0.c4
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(1 row)
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ROLLBACK TO SAVEPOINT svpt_1;
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SELECT sepgsql_getcon();-- should be 's0:c0.c8'
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sepgsql_getcon
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-------------------------------------------------
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unconfined_u:unconfined_r:unconfined_t:s0:c0.c8
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(1 row)
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SELECT sepgsql_setcon('unconfined_u:unconfined_r:unconfined_t:s0:c0.c6');
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sepgsql_setcon
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----------------
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t
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(1 row)
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COMMIT;
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SELECT sepgsql_getcon();-- should be 's0:c0.c6'
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sepgsql_getcon
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-------------------------------------------------
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unconfined_u:unconfined_r:unconfined_t:s0:c0.c6
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(1 row)
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-- sepgsql_regtest_user_t is not available dynamic-transition,
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-- unless sepgsql_setcon() is called inside of trusted-procedure
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SELECT sepgsql_getcon();-- confirm client privilege
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sepgsql_getcon
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------------------------------------------------------------
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unconfined_u:unconfined_r:sepgsql_regtest_user_t:s0:c0.c15
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(1 row)
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-- sepgsql_regtest_user_t has no permission to switch current label
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SELECT sepgsql_setcon('unconfined_u:unconfined_r:sepgsql_regtest_user_t:s0');-- failed
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ERROR: SELinux: security policy violation
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SELECT sepgsql_getcon();
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sepgsql_getcon
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------------------------------------------------------------
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unconfined_u:unconfined_r:sepgsql_regtest_user_t:s0:c0.c15
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(1 row)
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-- trusted procedure allows to switch, but unavailable to override MCS rules
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SELECT f5('unconfined_u:unconfined_r:sepgsql_regtest_user_t:s0:c0.c7');-- OK
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f5
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----
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t
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(1 row)
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SELECT sepgsql_getcon();
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sepgsql_getcon
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-----------------------------------------------------------
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unconfined_u:unconfined_r:sepgsql_regtest_user_t:s0:c0.c7
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(1 row)
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SELECT f5('unconfined_u:unconfined_r:sepgsql_regtest_user_t:s0:c0.c31');-- Failed
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ERROR: SELinux: security policy violation
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CONTEXT: SQL function "f5" statement 1
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SELECT sepgsql_getcon();
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sepgsql_getcon
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-----------------------------------------------------------
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unconfined_u:unconfined_r:sepgsql_regtest_user_t:s0:c0.c7
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(1 row)
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SELECT f5(NULL);-- Failed
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ERROR: SELinux: security policy violation
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CONTEXT: SQL function "f5" statement 1
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SELECT sepgsql_getcon();
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sepgsql_getcon
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-----------------------------------------------------------
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unconfined_u:unconfined_r:sepgsql_regtest_user_t:s0:c0.c7
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(1 row)
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BEGIN;
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SELECT f5('unconfined_u:unconfined_r:sepgsql_regtest_user_t:s0:c0.c3');-- OK
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f5
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----
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t
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(1 row)
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SELECT sepgsql_getcon();
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sepgsql_getcon
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-----------------------------------------------------------
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unconfined_u:unconfined_r:sepgsql_regtest_user_t:s0:c0.c3
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(1 row)
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ABORT;
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SELECT sepgsql_getcon();
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sepgsql_getcon
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-----------------------------------------------------------
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unconfined_u:unconfined_r:sepgsql_regtest_user_t:s0:c0.c7
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(1 row)
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--
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-- Test for simulation of typical connection pooling server
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--
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SELECT sepgsql_getcon();-- confirm client privilege
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sepgsql_getcon
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-----------------------------------------------------
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unconfined_u:unconfined_r:sepgsql_regtest_pool_t:s0
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(1 row)
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-- we shouldn't allow to switch client label without trusted procedure
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SELECT sepgsql_setcon('unconfined_u:unconfined_r:sepgsql_regtest_foo_t:s0');
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ERROR: SELinux: security policy violation
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SELECT * FROM auth_tbl;-- failed, no permission to reference
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ERROR: SELinux: security policy violation
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-- switch to "foo"
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SELECT auth_func('foo', 'acbd18db4cc2f85cedef654fccc4a4d8');
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auth_func
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-----------
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t
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(1 row)
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SELECT sepgsql_getcon();
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sepgsql_getcon
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----------------------------------------------------
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unconfined_u:unconfined_r:sepgsql_regtest_foo_t:s0
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(1 row)
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SELECT * FROM foo_tbl;-- OK
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a | b
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---+-----
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1 | aaa
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2 | bbb
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3 | ccc
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4 | ddd
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(4 rows)
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SELECT * FROM var_tbl;-- failed
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ERROR: SELinux: security policy violation
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SELECT * FROM auth_tbl;-- failed
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ERROR: SELinux: security policy violation
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SELECT sepgsql_setcon(NULL);-- end of session
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sepgsql_setcon
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----------------
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t
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(1 row)
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SELECT sepgsql_getcon();
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sepgsql_getcon
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-----------------------------------------------------
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unconfined_u:unconfined_r:sepgsql_regtest_pool_t:s0
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(1 row)
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-- the pooler cannot touch these tables directry
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SELECT * FROM foo_tbl;-- failed
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ERROR: SELinux: security policy violation
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SELECT * FROM var_tbl;-- failed
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ERROR: SELinux: security policy violation
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-- switch to "var"
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SELECT auth_func('var', 'b2145aac704ce76dbe1ac7adac535b23');
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auth_func
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-----------
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t
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(1 row)
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SELECT sepgsql_getcon();
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sepgsql_getcon
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----------------------------------------------------
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unconfined_u:unconfined_r:sepgsql_regtest_var_t:s0
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(1 row)
414+
415+
SELECT * FROM foo_tbl; -- failed
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ERROR: SELinux: security policy violation
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SELECT * FROM var_tbl; -- OK
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x | y
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---+-----
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2 | xxx
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3 | yyy
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4 | zzz
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5 | xyz
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(4 rows)
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SELECT * FROM auth_tbl;-- failed
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ERROR: SELinux: security policy violation
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SELECT sepgsql_setcon(NULL); -- end of session
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sepgsql_setcon
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----------------
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t
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(1 row)
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-- misc checks
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SELECT auth_func('var', 'invalid credential');-- not works
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auth_func
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-----------
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(1 row)
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SELECT sepgsql_getcon();
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sepgsql_getcon
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-----------------------------------------------------
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unconfined_u:unconfined_r:sepgsql_regtest_pool_t:s0
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(1 row)
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--
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-- Clean up
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--
@@ -115,3 +460,4 @@ DROP FUNCTION IF EXISTS f1() CASCADE;
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DROP FUNCTION IF EXISTS f2() CASCADE;
116461
DROP FUNCTION IF EXISTS f3() CASCADE;
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DROP FUNCTION IF EXISTS f4() CASCADE;
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DROP FUNCTION IF EXISTS f5(text) CASCADE;

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