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Annotation of embedaddon/strongswan/src/libcharon/plugins/xauth_pam/xauth_pam_plugin.c, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * Copyright (C) 2012 Martin Willi
                      3:  * Copyright (C) 2012 revosec AG
                      4:  *
                      5:  * This program is free software; you can redistribute it and/or modify it
                      6:  * under the terms of the GNU General Public License as published by the
                      7:  * Free Software Foundation; either version 2 of the License, or (at your
                      8:  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
                      9:  *
                     10:  * This program is distributed in the hope that it will be useful, but
                     11:  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
                     12:  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
                     13:  * for more details.
                     14:  */
                     15: 
                     16: #include "xauth_pam_plugin.h"
                     17: #include "xauth_pam.h"
                     18: #include "xauth_pam_listener.h"
                     19: 
                     20: #include <daemon.h>
                     21: 
                     22: #ifndef CAP_AUDIT_WRITE
                     23: #define CAP_AUDIT_WRITE 29
                     24: #endif
                     25: 
                     26: typedef struct private_xauth_pam_plugin_t private_xauth_pam_plugin_t;
                     27: 
                     28: /**
                     29:  * private data of xauth_pam plugin
                     30:  */
                     31: struct private_xauth_pam_plugin_t {
                     32: 
                     33:        /**
                     34:         * implements plugin interface
                     35:         */
                     36:        xauth_pam_plugin_t public;
                     37: 
                     38:        /**
                     39:         * Listener
                     40:         */
                     41:        xauth_pam_listener_t *listener;
                     42: 
                     43:        /**
                     44:         * Do PAM session management?
                     45:         */
                     46:        bool session;
                     47: };
                     48: 
                     49: /**
                     50:  * Register XAuth method and listener
                     51:  */
                     52: static bool register_listener(private_xauth_pam_plugin_t *this,
                     53:                                                          plugin_feature_t *feature, bool reg, void *data)
                     54: {
                     55:        if (reg)
                     56:        {
                     57:                charon->bus->add_listener(charon->bus, &this->listener->listener);
                     58:        }
                     59:        else
                     60:        {
                     61:                charon->bus->remove_listener(charon->bus, &this->listener->listener);
                     62:        }
                     63:        return TRUE;
                     64: }
                     65: 
                     66: METHOD(plugin_t, get_name, char*,
                     67:        private_xauth_pam_plugin_t *this)
                     68: {
                     69:        return "xauth-pam";
                     70: }
                     71: 
                     72: METHOD(plugin_t, get_features, int,
                     73:        private_xauth_pam_plugin_t *this, plugin_feature_t *features[])
                     74: {
                     75:        static plugin_feature_t f[] = {
                     76:                PLUGIN_CALLBACK(xauth_method_register, xauth_pam_create_server),
                     77:                        PLUGIN_PROVIDE(XAUTH_SERVER, "pam"),
                     78:                PLUGIN_CALLBACK((plugin_feature_callback_t)register_listener, NULL),
                     79:                        PLUGIN_PROVIDE(CUSTOM, "pam-session"),
                     80:        };
                     81:        *features = f;
                     82:        if (!this->session)
                     83:        {
                     84:                return 2;
                     85:        }
                     86:        return countof(f);
                     87: }
                     88: 
                     89: METHOD(plugin_t, destroy, void,
                     90:        private_xauth_pam_plugin_t *this)
                     91: {
                     92:        this->listener->destroy(this->listener);
                     93:        free(this);
                     94: }
                     95: 
                     96: /*
                     97:  * see header file
                     98:  */
                     99: plugin_t *xauth_pam_plugin_create()
                    100: {
                    101:        private_xauth_pam_plugin_t *this;
                    102: 
                    103:        /* required for PAM authentication */
                    104:        if (!lib->caps->keep(lib->caps, CAP_AUDIT_WRITE))
                    105:        {
                    106:                DBG1(DBG_DMN, "xauth-pam plugin requires CAP_AUDIT_WRITE capability");
                    107:                return NULL;
                    108:        }
                    109: 
                    110:        INIT(this,
                    111:                .public = {
                    112:                        .plugin = {
                    113:                                .get_name = _get_name,
                    114:                                .get_features = _get_features,
                    115:                                .destroy = _destroy,
                    116:                        },
                    117:                },
                    118:                .session = lib->settings->get_str(lib->settings,
                    119:                                                "%s.plugins.xauth-pam.session", FALSE, lib->ns),
                    120:                .listener = xauth_pam_listener_create(),
                    121:        );
                    122: 
                    123:        return &this->public.plugin;
                    124: }