Updated tests: cases with bugs or which cannot be run
with the cursor-protocol were excluded with
"--disable_cursor_protocol"/"--enable_cursor_protocol"
Fix for v.10.5
Per b9f3f06857, mysql_system_tables_data.sql creates
a mysql_native_password with a salted hash of "invalid" so that `set password`
will detect a native password can be applied:.
SHOW CREATE USER; diligently uses this value in its output
generating the SQL:
MariaDB [(none)]> show create user;
+---------------------------------------------------------------------------------------------------+
| CREATE USER for dan@localhost |
+---------------------------------------------------------------------------------------------------+
| CREATE USER `dan`@`localhost` IDENTIFIED VIA mysql_native_password USING 'invalid' OR unix_socket |
+---------------------------------------------------------------------------------------------------+
Attempting to execute this before this patch results in:
MariaDB [(none)]> CREATE USER `dan2`@`localhost` IDENTIFIED VIA mysql_native_password USING 'invalid' OR unix_socket;
ERROR 1372 (HY000): Password hash should be a 41-digit hexadecimal number
As such, deep the implementation of mysql_native_password we make "invalid" valid (pun intended)
such that the above create user will succeed. We do this by storing
"*THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE" (credit: Oracle MySQL), that is of an INCORRECT
length for a scramble.
In native_password_authenticate we check the length of this cached value
and immediately fail if it is anything other than the scramble length.
native_password_get_salt is only called in the context of set_user_salt, so all setting of native
passwords to hashed content of 'invalid', quite literally create an invalid password.
So other forms of "invalid" are valid SQL in creating invalid passwords:
MariaDB [(none)]> set password = 'invalid';
Query OK, 0 rows affected (0.001 sec)
MariaDB [(none)]> alter user dan@localhost IDENTIFIED BY PASSWORD 'invalid';
Query OK, 0 rows affected (0.000 sec)
closes#1628
Reviewer: serg@mariadb.com
Support SET PASSWORD for authentication plugins.
Authentication plugin API is extended with two optional methods:
* hash_password() is used to compute a password hash (or digest)
from the plain-text password. This digest will be stored in mysql.user
table
* preprocess_hash() is used to convert this digest into some memory
representation that can be later used to authenticate a user.
Build-in plugins convert the hash from hexadecimal or base64 to binary,
to avoid doing it on every authentication attempt.
Note a change in behavior: when loading privileges (on startup or on
FLUSH PRIVILEGES) an account with an unknown plugin was loaded with a
warning (e.g. "Plugin 'foo' is not loaded"). But such an account could
not be used for authentication until the plugin is installed. Now an
account like that will not be loaded at all (with a warning, still).
Indeed, without plugin's preprocess_hash() method the server cannot know
how to load an account. Thus, if a new authentication plugin is
installed run-time, one might need FLUSH PRIVILEGES to activate all
existing accounts that were using this new plugin.
