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Annotation of embedaddon/strongswan/src/libcharon/plugins/ext_auth/ext_auth_plugin.c, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * Copyright (c) 2014 Vyronas Tsingaras (vtsingaras@it.auth.gr)
                      3:  * Copyright (C) 2014 Martin Willi
                      4:  * Copyright (C) 2014 revosec AG
                      5:  *
                      6:  * Permission is hereby granted, free of charge, to any person obtaining a copy
                      7:  * of this software and associated documentation files (the "Software"), to deal
                      8:  * in the Software without restriction, including without limitation the rights
                      9:  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
                     10:  * copies of the Software, and to permit persons to whom the Software is
                     11:  * furnished to do so, subject to the following conditions:
                     12:  *
                     13:  * The above copyright notice and this permission notice shall be included in
                     14:  * all copies or substantial portions of the Software.
                     15:  *
                     16:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
                     17:  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
                     18:  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
                     19:  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
                     20:  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
                     21:  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
                     22:  * THE SOFTWARE.
                     23:  */
                     24: 
                     25: #include "ext_auth_plugin.h"
                     26: #include "ext_auth_listener.h"
                     27: 
                     28: #include <daemon.h>
                     29: 
                     30: typedef struct private_ext_auth_plugin_t private_ext_auth_plugin_t;
                     31: 
                     32: /**
                     33:  * private data of ext_auth plugin
                     34:  */
                     35: struct private_ext_auth_plugin_t {
                     36: 
                     37:        /**
                     38:         * implements plugin interface
                     39:         */
                     40:        ext_auth_plugin_t public;
                     41: 
                     42:        /**
                     43:         * Listener verifying peers during authorization
                     44:         */
                     45:        ext_auth_listener_t *listener;
                     46: };
                     47: 
                     48: METHOD(plugin_t, get_name, char*,
                     49:        private_ext_auth_plugin_t *this)
                     50: {
                     51:        return "ext-auth";
                     52: }
                     53: 
                     54: /**
                     55:  * Create a listener instance, NULL on error
                     56:  */
                     57: static ext_auth_listener_t* create_listener()
                     58: {
                     59:        char *script;
                     60: 
                     61:        script = lib->settings->get_str(lib->settings,
                     62:                                        "%s.plugins.ext-auth.script", NULL, lib->ns);
                     63:        if (!script)
                     64:        {
                     65:                DBG1(DBG_CFG, "no script for ext-auth script defined, disabled");
                     66:                return NULL;
                     67:        }
                     68:        DBG1(DBG_CFG, "using ext-auth script '%s'", script);
                     69:        return ext_auth_listener_create(script);
                     70: }
                     71: 
                     72: /**
                     73:  * Register listener
                     74:  */
                     75: static bool plugin_cb(private_ext_auth_plugin_t *this,
                     76:                                          plugin_feature_t *feature, bool reg, void *cb_data)
                     77: {
                     78:        if (reg)
                     79:        {
                     80:                this->listener = create_listener();
                     81:                if (!this->listener)
                     82:                {
                     83:                        return FALSE;
                     84:                }
                     85:                charon->bus->add_listener(charon->bus, &this->listener->listener);
                     86:        }
                     87:        else
                     88:        {
                     89:                if (this->listener)
                     90:                {
                     91:                        charon->bus->remove_listener(charon->bus, &this->listener->listener);
                     92:                        this->listener->destroy(this->listener);
                     93:                }
                     94:        }
                     95:        return TRUE;
                     96: }
                     97: 
                     98: METHOD(plugin_t, get_features, int,
                     99:        private_ext_auth_plugin_t *this, plugin_feature_t *features[])
                    100: {
                    101:        static plugin_feature_t f[] = {
                    102:                PLUGIN_CALLBACK((plugin_feature_callback_t)plugin_cb, NULL),
                    103:                        PLUGIN_PROVIDE(CUSTOM, "ext_auth"),
                    104:        };
                    105:        *features = f;
                    106:        return countof(f);
                    107: }
                    108: 
                    109: 
                    110: METHOD(plugin_t, reload, bool,
                    111:        private_ext_auth_plugin_t *this)
                    112: {
                    113:        ext_auth_listener_t *listener;
                    114: 
                    115:        /* reload new listener overlapped */
                    116:        listener = create_listener();
                    117:        if (listener)
                    118:        {
                    119:                charon->bus->add_listener(charon->bus, &listener->listener);
                    120:        }
                    121:        if (this->listener)
                    122:        {
                    123:                charon->bus->remove_listener(charon->bus, &this->listener->listener);
                    124:                this->listener->destroy(this->listener);
                    125:        }
                    126:        this->listener = listener;
                    127: 
                    128:        return TRUE;
                    129: }
                    130: 
                    131: METHOD(plugin_t, destroy, void,
                    132:        private_ext_auth_plugin_t *this)
                    133: {
                    134:        free(this);
                    135: }
                    136: 
                    137: /**
                    138:  * Plugin constructor
                    139:  */
                    140: plugin_t *ext_auth_plugin_create()
                    141: {
                    142:        private_ext_auth_plugin_t *this;
                    143: 
                    144:        INIT(this,
                    145:                .public = {
                    146:                        .plugin = {
                    147:                                .get_name = _get_name,
                    148:                                .get_features = _get_features,
                    149:                                .reload = _reload,
                    150:                                .destroy = _destroy,
                    151:                        },
                    152:                },
                    153:        );
                    154: 
                    155:        return &this->public.plugin;
                    156: }