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118 lines
3.6 KiB
C
118 lines
3.6 KiB
C
/* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; version 2 of the
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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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#include <my_global.h>
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#include <mysql/plugin_auth.h>
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#include <mysql/client_plugin.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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/********************* CLIENT SIDE ***************************************/
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/*
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client plugin used for testing the plugin API
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*/
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#include <mysql.h>
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/**
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The main function of the test plugin.
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Reads the prompt, check if the handshake is done and if the prompt is a
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password request and returns the password. Otherwise return error.
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@note
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1. this plugin shows how a client authentication plugin
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may read a MySQL protocol OK packet internally - which is important
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where a number of packets is not known in advance.
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2. the first byte of the prompt is special. it is not
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shown to the user, but signals whether it is the last question
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(prompt[0] & 1 == 1) or not last (prompt[0] & 1 == 0),
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and whether the input is a password (not echoed).
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3. the prompt is expected to be sent zero-terminated
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*/
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static int test_plugin_client(MYSQL_PLUGIN_VIO *vio, MYSQL *mysql)
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{
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unsigned char *pkt, cmd= 0;
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int pkt_len, res;
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char *reply;
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do
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{
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/* read the prompt */
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pkt_len= vio->read_packet(vio, &pkt);
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if (pkt_len < 0)
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return CR_ERROR;
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if (pkt == 0)
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{
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/*
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in mysql_change_user() the client sends the first packet, so
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the first vio->read_packet() does nothing (pkt == 0).
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We send the "password", assuming the client knows what its doing.
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(in other words, the dialog plugin should be only set as a default
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authentication plugin on the client if the first question
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asks for a password - which will be sent in cleat text, by the way)
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*/
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reply= mysql->passwd;
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}
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else
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{
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cmd= *pkt++;
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/* is it MySQL protocol (0=OK or 254=need old password) packet ? */
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if (cmd == 0 || cmd == 254)
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return CR_OK_HANDSHAKE_COMPLETE; /* yes. we're done */
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/*
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asking for a password with an empty prompt means mysql->password
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otherwise return an error
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*/
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if ((cmd == LAST_PASSWORD[0] || cmd == PASSWORD_QUESTION[0]) && *pkt == 0)
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reply= mysql->passwd;
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else
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return CR_ERROR;
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}
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if (!reply)
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return CR_ERROR;
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/* send the reply to the server */
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res= vio->write_packet(vio, (const unsigned char *) reply,
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(int)strlen(reply) + 1);
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if (res)
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return CR_ERROR;
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/* repeat unless it was the last question */
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} while (cmd != LAST_QUESTION[0] && cmd != PASSWORD_QUESTION[0]);
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/* the job of reading the ok/error packet is left to the server */
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return CR_OK;
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}
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mysql_declare_client_plugin(AUTHENTICATION)
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"qa_auth_client",
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"Horst Hunger",
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"Dialog Client Authentication Plugin",
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{0,1,0},
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"GPL",
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NULL,
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NULL,
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NULL,
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NULL,
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test_plugin_client,
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NULL
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mysql_end_client_plugin;
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