trigger-grant.test

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# Test case(s) in this file contain(s) GRANT/REVOKE statements, which are not
# supported in embedded server. So, this test should not be run on embedded
# server.

-- source include/not_embedded.inc

###########################################################################
#
# Tests for WL#2818:
#   - Check that triggers are executed under the authorization of the definer.
#   - Check DEFINER clause of CREATE TRIGGER statement;
#     - Check that SUPER privilege required to create a trigger with different
#       definer.
#     - Check that if the user specified as DEFINER does not exist, a warning
#       is emitted.
#     - Check that the definer of a trigger does not exist, the trigger will
#       not be activated.
#   - Check that SHOW TRIGGERS statement provides "Definer" column.
#   - Check that if trigger contains NEW/OLD variables, the definer must have
#     SELECT privilege on the subject table (aka BUG#15166/BUG#15196).
#
#  Let's also check that user name part of definer can contain '@' symbol (to
#  check that triggers are not affected by BUG#13310 "incorrect user parsing
#  by SP").
#
###########################################################################

#
# Prepare environment.
#

DELETE FROM mysql.user WHERE User LIKE 'mysqltest_%';
DELETE FROM mysql.db WHERE User LIKE 'mysqltest_%';
DELETE FROM mysql.tables_priv WHERE User LIKE 'mysqltest_%';
DELETE FROM mysql.columns_priv WHERE User LIKE 'mysqltest_%';
FLUSH PRIVILEGES;

--disable_warnings
DROP DATABASE IF EXISTS mysqltest_db1;
--enable_warnings

CREATE DATABASE mysqltest_db1;

CREATE USER mysqltest_dfn@localhost;
CREATE USER mysqltest_inv@localhost;

GRANT SUPER ON *.* TO mysqltest_dfn@localhost;
GRANT CREATE ON mysqltest_db1.* TO mysqltest_dfn@localhost;

#
# Check that triggers are executed under the authorization of the definer:
#   - create two tables under "definer";
#   - grant all privileges on the test db to "definer";
#   - grant all privileges on the first table to "invoker";
#   - grant only select privilege on the second table to "invoker";
#   - create a trigger, which inserts a row into the second table after
#     inserting into the first table.
#   - insert a row into the first table under "invoker". A row also should be
#     inserted into the second table.
#

--connect (wl2818_definer_con,localhost,mysqltest_dfn,,mysqltest_db1)
--connection wl2818_definer_con
--echo
--echo ---> connection: wl2818_definer_con

CREATE TABLE t1(num_value INT);
CREATE TABLE t2(user_str TEXT);

CREATE TRIGGER trg1 AFTER INSERT ON t1
  FOR EACH ROW
    INSERT INTO t2 VALUES(CURRENT_USER());

--connection default
--echo
--echo ---> connection: default

# Setup definer's privileges.

GRANT ALL PRIVILEGES ON mysqltest_db1.t1 TO mysqltest_dfn@localhost;
GRANT ALL PRIVILEGES ON mysqltest_db1.t2 TO mysqltest_dfn@localhost;

# Setup invoker's privileges.

GRANT ALL PRIVILEGES ON mysqltest_db1.t1
  TO 'mysqltest_inv'@localhost;
  
GRANT SELECT ON mysqltest_db1.t2
  TO 'mysqltest_inv'@localhost;

--connection wl2818_definer_con
--echo
--echo ---> connection: wl2818_definer_con

use mysqltest_db1;

INSERT INTO t1 VALUES(1);

SELECT * FROM t1;
SELECT * FROM t2;

--connect (wl2818_invoker_con,localhost,mysqltest_inv,,mysqltest_db1)
--connection wl2818_invoker_con
--echo
--echo ---> connection: wl2818_invoker_con

use mysqltest_db1;

INSERT INTO t1 VALUES(2);

SELECT * FROM t1;
SELECT * FROM t2;

#
# Check that if definer lost some privilege required to execute (activate) a
# trigger, the trigger will not be activated:
#  - create a trigger on insert into the first table, which will insert a row
#    into the second table;
#  - revoke INSERT privilege on the second table from the definer;
#  - insert a row into the first table;
#  - check that an error has been risen;
#  - check that no row has been inserted into the second table;
#

--connection default
--echo
--echo ---> connection: default

use mysqltest_db1;

REVOKE INSERT ON mysqltest_db1.t2 FROM mysqltest_dfn@localhost;

--connection wl2818_invoker_con
--echo
--echo ---> connection: wl2818_invoker_con

use mysqltest_db1;

--error ER_TABLEACCESS_DENIED_ERROR
INSERT INTO t1 VALUES(3);

SELECT * FROM t1;
SELECT * FROM t2;

#
# Check DEFINER clause of CREATE TRIGGER statement.
#
# NOTE: there is no dedicated TRIGGER privilege for CREATE TRIGGER statement.
# SUPER privilege is used instead. I.e., if one invokes CREATE TRIGGER, it should
# have SUPER privilege, so this test is meaningless right now.
#
#   - Check that SUPER privilege required to create a trigger with different
#     definer:
#     - try to create a trigger with DEFINER="definer@localhost" under
#       "invoker";
#     - analyze error code;
#   - Check that if the user specified as DEFINER does not exist, a warning is
#     emitted:
#     - create a trigger with DEFINER="non_existent_user@localhost" from
#       "definer";
#     - check that a warning emitted;
#   - Check that the definer of a trigger does not exist, the trigger will not
#     be activated:
#     - activate just created trigger;
#     - check error code;
#

--connection wl2818_definer_con
--echo
--echo ---> connection: wl2818_definer_con

use mysqltest_db1;

DROP TRIGGER trg1;

# Check that SUPER is required to specify different DEFINER.
# NOTE: meaningless at the moment

CREATE DEFINER='mysqltest_inv'@'localhost'
  TRIGGER trg1 BEFORE INSERT ON t1
  FOR EACH ROW
    SET @new_sum = 0;

# Create with non-existent user.

CREATE DEFINER='mysqltest_nonexs'@'localhost'
  TRIGGER trg2 AFTER INSERT ON t1
  FOR EACH ROW
    SET @new_sum = 0;

# Check that trg2 will not be activated.

--error ER_SPECIFIC_ACCESS_DENIED_ERROR
INSERT INTO t1 VALUES(6);

#
# Check that SHOW TRIGGERS statement provides "Definer" column.
#

SHOW TRIGGERS;

#
# Check that weird definer values do not break functionality. I.e. check the
# following definer values:
#   - '';
#   - '@';
#   - '@abc@def@@';
#   - '@hostname';
#   - '@abc@def@@@hostname';
#

DROP TRIGGER trg1;
DROP TRIGGER trg2;

CREATE TRIGGER trg1 BEFORE INSERT ON t1
  FOR EACH ROW
    SET @a = 1;

CREATE TRIGGER trg2 AFTER INSERT ON t1
  FOR EACH ROW
    SET @a = 2;

CREATE TRIGGER trg3 BEFORE UPDATE ON t1
  FOR EACH ROW
    SET @a = 3;

CREATE TRIGGER trg4 AFTER UPDATE ON t1
  FOR EACH ROW
    SET @a = 4;

CREATE TRIGGER trg5 BEFORE DELETE ON t1
  FOR EACH ROW
    SET @a = 5;

# Replace definers with the "weird" definers
perl;
use strict;
use warnings;
my $fname= "$ENV{'MYSQLTEST_VARDIR'}/master-data/mysqltest_db1/t1.TRG";
open(FILE, "<", $fname) or die;
my @content= grep($_ !~ /^definers=/, <FILE>);
close FILE;
open(FILE, ">", $fname) or die;
# Use binary file mode to avoid CR/LF's being added on windows
binmode FILE;
print FILE @content;
print FILE "definers='' '\@' '\@abc\@def\@\@' '\@hostname' '\@abcdef\@\@\@hostname'\n";
close FILE;
EOF

--echo

SELECT trigger_name, definer FROM INFORMATION_SCHEMA.TRIGGERS ORDER BY trigger_name;

--echo

SELECT * FROM INFORMATION_SCHEMA.TRIGGERS ORDER BY trigger_name;

#
# Cleanup
#

--connection default
--echo
--echo ---> connection: default

DROP USER mysqltest_dfn@localhost;
DROP USER mysqltest_inv@localhost;

DROP DATABASE mysqltest_db1;

###########################################################################
#
# BUG#15166: Wrong update [was: select/update] permissions required to execute
# triggers.
#
# BUG#15196: Wrong select permission required to execute triggers.
#
###########################################################################

#
# Prepare environment.
#

DELETE FROM mysql.user WHERE User LIKE 'mysqltest_%';
DELETE FROM mysql.db WHERE User LIKE 'mysqltest_%';
DELETE FROM mysql.tables_priv WHERE User LIKE 'mysqltest_%';
DELETE FROM mysql.columns_priv WHERE User LIKE 'mysqltest_%';
FLUSH PRIVILEGES;

--disable_warnings
DROP DATABASE IF EXISTS mysqltest_db1;
--enable_warnings

CREATE DATABASE mysqltest_db1;

use mysqltest_db1;

# Tables for tesing table-level privileges:
CREATE TABLE t1(col CHAR(20)); # table for "read-value" trigger
CREATE TABLE t2(col CHAR(20)); # table for "write-value" trigger

# Tables for tesing column-level privileges:
CREATE TABLE t3(col CHAR(20)); # table for "read-value" trigger
CREATE TABLE t4(col CHAR(20)); # table for "write-value" trigger

CREATE USER mysqltest_u1@localhost;
REVOKE ALL PRIVILEGES, GRANT OPTION FROM mysqltest_u1@localhost;
GRANT SUPER ON *.* TO mysqltest_u1@localhost;
GRANT SELECT ON mysqltest_db1.t1 TO mysqltest_u1@localhost; # to allow connect

SET @mysqltest_var = NULL;

--connect (bug15166_u1_con,localhost,mysqltest_u1,,mysqltest_db1)

# parsing (CREATE TRIGGER) time:
#   - check that nor SELECT either UPDATE is required to execute triggger w/o
#     NEW/OLD variables.

--connection default
--echo
--echo ---> connection: default

use mysqltest_db1;

REVOKE SELECT ON mysqltest_db1.t1 FROM mysqltest_u1@localhost;
GRANT DELETE ON mysqltest_db1.* TO mysqltest_u1@localhost;
SHOW GRANTS FOR mysqltest_u1@localhost;

--connection bug15166_u1_con
--echo
--echo ---> connection: bug15166_u1_con

use mysqltest_db1;

CREATE TRIGGER t1_trg_after_delete AFTER DELETE ON t1
  FOR EACH ROW
    SET @mysqltest_var = 'Hello, world!';

# parsing (CREATE TRIGGER) time:
#   - check that UPDATE is not enough to read the value;
#   - check that UPDATE is required to modify the value;

--connection default
--echo
--echo ---> connection: default

use mysqltest_db1;

GRANT UPDATE ON mysqltest_db1.t1 TO mysqltest_u1@localhost;
GRANT UPDATE ON mysqltest_db1.t2 TO mysqltest_u1@localhost;

GRANT UPDATE(col) ON mysqltest_db1.t3 TO mysqltest_u1@localhost;
GRANT UPDATE(col) ON mysqltest_db1.t4 TO mysqltest_u1@localhost;

--connection bug15166_u1_con
--echo
--echo ---> connection: bug15166_u1_con

use mysqltest_db1;

# - table-level privileges

# TODO: check privileges at CREATE TRIGGER time.
# --error ER_COLUMNACCESS_DENIED_ERROR
CREATE TRIGGER t1_trg_err_1 BEFORE INSERT ON t1
  FOR EACH ROW
    SET @mysqltest_var = NEW.col;
DROP TRIGGER t1_trg_err_1;

# TODO: check privileges at CREATE TRIGGER time.
# --error ER_COLUMNACCESS_DENIED_ERROR
CREATE TRIGGER t1_trg_err_2 BEFORE DELETE ON t1
  FOR EACH ROW
    SET @mysqltest_var = OLD.col;
DROP TRIGGER t1_trg_err_2;