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132 lines
4.4 KiB
C
132 lines
4.4 KiB
C
#ifndef MYSQL_PLUGIN_AUTH_COMMON_INCLUDED
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/* Copyright (C) 2010 Sergei Golubchik and Monty Program Ab
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Copyright (c) 2010, Oracle and/or its affiliates.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
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#ifdef _WIN32
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#include <windows.h>
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#endif
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/**
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@file
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This file defines constants and data structures that are the same for
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both client- and server-side authentication plugins.
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*/
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#define MYSQL_PLUGIN_AUTH_COMMON_INCLUDED
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/** the max allowed length for a user name */
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#define MYSQL_USERNAME_LENGTH 512
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/**
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return values of the plugin authenticate_user() method.
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*/
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/**
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Authentication failed, plugin internal error.
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An error occurred in the authentication plugin itself.
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These errors are reported in table performance_schema.host_cache,
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column COUNT_AUTH_PLUGIN_ERRORS.
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*/
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#define CR_AUTH_PLUGIN_ERROR 3
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/**
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Authentication failed, client server handshake.
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An error occurred during the client server handshake.
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These errors are reported in table performance_schema.host_cache,
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column COUNT_HANDSHAKE_ERRORS.
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*/
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#define CR_AUTH_HANDSHAKE 2
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/**
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Authentication failed, user credentials.
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For example, wrong passwords.
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These errors are reported in table performance_schema.host_cache,
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column COUNT_AUTHENTICATION_ERRORS.
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*/
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#define CR_AUTH_USER_CREDENTIALS 1
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/**
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Authentication failed. Additionally, all other CR_xxx values
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(libmysql error code) can be used too.
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The client plugin may set the error code and the error message directly
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in the MYSQL structure and return CR_ERROR. If a CR_xxx specific error
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code was returned, an error message in the MYSQL structure will be
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overwritten. If CR_ERROR is returned without setting the error in MYSQL,
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CR_UNKNOWN_ERROR will be user.
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*/
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#define CR_ERROR 0
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/**
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Authentication (client part) was successful. It does not mean that the
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authentication as a whole was successful, usually it only means
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that the client was able to send the user name and the password to the
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server. If CR_OK is returned, the libmysql reads the next packet expecting
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it to be one of OK, ERROR, or CHANGE_PLUGIN packets.
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*/
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#define CR_OK -1
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/**
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Authentication was successful.
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It means that the client has done its part successfully and also that
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a plugin has read the last packet (one of OK, ERROR, CHANGE_PLUGIN).
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In this case, libmysql will not read a packet from the server,
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but it will use the data at mysql->net.read_pos.
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A plugin may return this value if the number of roundtrips in the
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authentication protocol is not known in advance, and the client plugin
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needs to read one packet more to determine if the authentication is finished
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or not.
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*/
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#define CR_OK_HANDSHAKE_COMPLETE -2
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typedef struct st_plugin_vio_info
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{
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enum { MYSQL_VIO_INVALID, MYSQL_VIO_TCP, MYSQL_VIO_SOCKET,
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MYSQL_VIO_PIPE, MYSQL_VIO_MEMORY } protocol;
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int socket; /**< it's set, if the protocol is SOCKET or TCP */
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#ifdef _WIN32
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HANDLE handle; /**< it's set, if the protocol is PIPE or MEMORY */
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#endif
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} MYSQL_PLUGIN_VIO_INFO;
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/**
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Provides plugin access to communication channel
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*/
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typedef struct st_plugin_vio
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{
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/**
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Plugin provides a pointer reference and this function sets it to the
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contents of any incoming packet. Returns the packet length, or -1 if
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the plugin should terminate.
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*/
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int (*read_packet)(struct st_plugin_vio *vio,
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unsigned char **buf);
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/**
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Plugin provides a buffer with data and the length and this
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function sends it as a packet. Returns 0 on success, 1 on failure.
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*/
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int (*write_packet)(struct st_plugin_vio *vio,
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const unsigned char *packet,
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int packet_len);
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/**
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Fills in a st_plugin_vio_info structure, providing the information
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about the connection.
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*/
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void (*info)(struct st_plugin_vio *vio, struct st_plugin_vio_info *info);
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} MYSQL_PLUGIN_VIO;
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#endif
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