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7c40996cc8
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.
80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
/* Copyright (c) 2010, 2011, 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 02110-1301 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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/********************* SERVER SIDE ****************************************/
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static int qa_auth_interface (MYSQL_PLUGIN_VIO *vio, MYSQL_SERVER_AUTH_INFO *info)
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{
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unsigned char *pkt;
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int pkt_len, err= CR_OK;
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/* send a password question */
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if (vio->write_packet(vio, (const unsigned char *) PASSWORD_QUESTION, 1))
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return CR_ERROR;
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/* read the answer */
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if ((pkt_len= vio->read_packet(vio, &pkt)) < 0)
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return CR_ERROR;
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info->password_used= PASSWORD_USED_YES;
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/* fail if the password is wrong */
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if (strcmp((const char *) pkt, info->auth_string))
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return CR_ERROR;
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/* Test of default_auth */
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if (strcmp(info->user_name, "qa_test_11_user")== 0)
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{
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strcpy(info->authenticated_as, "qa_test_11_dest");
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}
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else
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err= CR_ERROR;
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return err;
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}
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static struct st_mysql_auth qa_auth_test_handler=
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{
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MYSQL_AUTHENTICATION_INTERFACE_VERSION,
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"qa_auth_interface", /* requires test_plugin client's plugin */
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qa_auth_interface,
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NULL, NULL /* no PASSWORD() */
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};
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mysql_declare_plugin(test_plugin)
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{
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MYSQL_AUTHENTICATION_PLUGIN,
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&qa_auth_test_handler,
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"qa_auth_server",
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"Horst Hunger",
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"plugin API test plugin",
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PLUGIN_LICENSE_GPL,
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NULL,
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NULL,
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0x0100,
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NULL,
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NULL,
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NULL,
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0,
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}
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mysql_declare_plugin_end;
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