MySQL 5.7 Reference Manual
MySQL 5.7 Release Notes
MySQL includes two plugins that implement native authentication;
that is, authentication based on the password hashing methods in
use from before the introduction of pluggable authentication.
This section describes mysql_old_password,
which implements authentication against the
mysql.user system table using the older
(pre-4.1) native password hashing method. For information about
mysql_native_password, which implements
authentication using the native password hashing method, see
Section 6.1.1, “Native Pluggable Authentication”. For
information about these password hashing methods, see
Section 2.2.4, “Password Hashing in MySQL”.
Note
Passwords that use the pre-4.1 hashing method are less secure
than passwords that use the native password hashing method and
should be avoided. Pre-4.1 passwords are deprecated and
support for them (including the
mysql_old_password plugin) was removed in
MySQL 5.7.5. For account upgrade instructions, see
Section 6.1.3, “Migrating Away from Pre-4.1 Password Hashing and the mysql_old_password
Plugin”.
The following table shows the plugin names on the server and client sides.
Table 6.2 Plugin and Library Names for Old Native Password Authentication
| Plugin or File | Plugin or File Name |
|---|---|
| Server-side plugin | mysql_old_password |
| Client-side plugin | mysql_old_password |
| Library file | None (plugins are built in) |
The following sections provide installation and usage information specific to old native pluggable authentication:
For general information about pluggable authentication in MySQL, see Section 4.13, “Pluggable Authentication”.
The mysql_old_password plugin exists in
server and client forms:
The server-side plugin is built into the server, need not be loaded explicitly, and cannot be disabled by unloading it.
The client-side plugin is built into the
libmysqlclientclient library and is available to any program linked againstlibmysqlclient.
MySQL client programs can use the
--default-auth option to specify
the mysql_old_password plugin as a hint
about which client-side plugin the program can expect to use:
$> mysql --default-auth=mysql_old_password ...