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Annotation of embedaddon/strongswan/src/libcharon/plugins/dnscert/dnscert_plugin.c, revision 1.1

1.1     ! misho       1: /*
        !             2:  * Copyright (C) 2013 Tobias Brunner
        !             3:  * Copyright (C) 2012 Reto Guadagnini
        !             4:  * HSR Hochschule fuer Technik Rapperswil
        !             5:  *
        !             6:  * This program is free software; you can redistribute it and/or modify it
        !             7:  * under the terms of the GNU General Public License as published by the
        !             8:  * Free Software Foundation; either version 2 of the License, or (at your
        !             9:  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
        !            10:  *
        !            11:  * This program is distributed in the hope that it will be useful, but
        !            12:  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
        !            13:  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
        !            14:  * for more details.
        !            15:  */
        !            16: /*
        !            17:  * Copyright (C) 2013 Ruslan Marchenko
        !            18:  *
        !            19:  * Permission is hereby granted, free of charge, to any person obtaining a copy
        !            20:  * of this software and associated documentation files (the "Software"), to deal
        !            21:  * in the Software without restriction, including without limitation the rights
        !            22:  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
        !            23:  * copies of the Software, and to permit persons to whom the Software is
        !            24:  * furnished to do so, subject to the following conditions:
        !            25:  *
        !            26:  * The above copyright notice and this permission notice shall be included in
        !            27:  * all copies or substantial portions of the Software.
        !            28:  *
        !            29:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
        !            30:  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
        !            31:  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
        !            32:  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
        !            33:  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
        !            34:  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
        !            35:  * THE SOFTWARE.
        !            36: */
        !            37: 
        !            38: #include "dnscert_plugin.h"
        !            39: 
        !            40: #include <daemon.h>
        !            41: #include "dnscert_cred.h"
        !            42: 
        !            43: typedef struct private_dnscert_plugin_t private_dnscert_plugin_t;
        !            44: 
        !            45: 
        !            46: /**
        !            47:  * private data of the dnscert plugin
        !            48:  */
        !            49: struct private_dnscert_plugin_t {
        !            50: 
        !            51:        /**
        !            52:         * implements plugin interface
        !            53:         */
        !            54:        dnscert_plugin_t public;
        !            55: 
        !            56:        /**
        !            57:         * credential set
        !            58:         */
        !            59:        dnscert_cred_t *cred;
        !            60: 
        !            61:        /**
        !            62:         * DNSCERT based authentication enabled
        !            63:         */
        !            64:        bool enabled;
        !            65: };
        !            66: 
        !            67: METHOD(plugin_t, get_name, char*,
        !            68:        private_dnscert_plugin_t *this)
        !            69: {
        !            70:        return "dnscert";
        !            71: }
        !            72: 
        !            73: METHOD(plugin_t, reload, bool,
        !            74:        private_dnscert_plugin_t *this)
        !            75: {
        !            76:        bool enabled = lib->settings->get_bool(lib->settings,
        !            77:                                                                "%s.plugins.dnscert.enable", FALSE, lib->ns);
        !            78: 
        !            79:        if (enabled != this->enabled)
        !            80:        {
        !            81:                if (enabled)
        !            82:                {
        !            83:                        lib->credmgr->add_set(lib->credmgr, &this->cred->set);
        !            84:                }
        !            85:                else
        !            86:                {
        !            87:                        lib->credmgr->remove_set(lib->credmgr, &this->cred->set);
        !            88:                }
        !            89:                this->enabled = enabled;
        !            90:        }
        !            91:        DBG1(DBG_CFG, "dnscert plugin is %sabled", this->enabled ? "en" : "dis");
        !            92:        return TRUE;
        !            93: }
        !            94: 
        !            95: /**
        !            96:  * Create resolver and register credential set
        !            97:  */
        !            98: static bool plugin_cb(private_dnscert_plugin_t *this,
        !            99:                                          plugin_feature_t *feature, bool reg, void *cb_data)
        !           100: {
        !           101:        if (reg)
        !           102:        {
        !           103:                resolver_t *res;
        !           104: 
        !           105:                res = lib->resolver->create(lib->resolver);
        !           106:                if (!res)
        !           107:                {
        !           108:                        DBG1(DBG_CFG, "failed to create a DNS resolver instance");
        !           109:                        return FALSE;
        !           110:                }
        !           111: 
        !           112:                this->cred = dnscert_cred_create(res);
        !           113:                reload(this);
        !           114:        }
        !           115:        else
        !           116:        {
        !           117:                if (this->enabled)
        !           118:                {
        !           119:                        lib->credmgr->remove_set(lib->credmgr, &this->cred->set);
        !           120:                }
        !           121:                this->cred->destroy(this->cred);
        !           122:        }
        !           123:        return TRUE;
        !           124: }
        !           125: 
        !           126: METHOD(plugin_t, get_features, int,
        !           127:        private_dnscert_plugin_t *this, plugin_feature_t *features[])
        !           128: {
        !           129:        static plugin_feature_t f[] = {
        !           130:                PLUGIN_CALLBACK((plugin_feature_callback_t)plugin_cb, NULL),
        !           131:                        PLUGIN_PROVIDE(CUSTOM, "dnscert"),
        !           132:                                PLUGIN_DEPENDS(RESOLVER),
        !           133:                                PLUGIN_DEPENDS(CERT_DECODE, CERT_ANY),
        !           134:                                PLUGIN_SDEPEND(CERT_DECODE, CERT_X509),
        !           135:                                PLUGIN_SDEPEND(CERT_DECODE, CERT_GPG),
        !           136:        };
        !           137:        *features = f;
        !           138:        return countof(f);
        !           139: }
        !           140: 
        !           141: METHOD(plugin_t, destroy, void,
        !           142:        private_dnscert_plugin_t *this)
        !           143: {
        !           144:        free(this);
        !           145: }
        !           146: 
        !           147: /*
        !           148:  * see header file
        !           149:  */
        !           150: plugin_t *dnscert_plugin_create()
        !           151: {
        !           152:        private_dnscert_plugin_t *this;
        !           153: 
        !           154:        INIT(this,
        !           155:                .public = {
        !           156:                        .plugin = {
        !           157:                                .get_name = _get_name,
        !           158:                                .get_features = _get_features,
        !           159:                                .reload = _reload,
        !           160:                                .destroy = _destroy,
        !           161:                        },
        !           162:                },
        !           163:        );
        !           164: 
        !           165:        return &this->public.plugin;
        !           166: }