diff options
Diffstat (limited to 'src/authorization/anastasis_authorization_plugin.c')
| -rw-r--r-- | src/authorization/anastasis_authorization_plugin.c | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/src/authorization/anastasis_authorization_plugin.c b/src/authorization/anastasis_authorization_plugin.c new file mode 100644 index 0000000..7874594 --- /dev/null +++ b/src/authorization/anastasis_authorization_plugin.c @@ -0,0 +1,239 @@ +/* + This file is part of TALER + Copyright (C) 2015, 2016, 2021 Taler Systems SA + + TALER is free software; you can redistribute it and/or modify it under the + terms of the GNU Lesser General Public License as published by the Free Software + Foundation; either version 3, or (at your option) any later version. + + TALER is distributed in the hope that it will be useful, but WITHOUT ANY + WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR + A PARTICULAR PURPOSE. See the GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along with + TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/> +*/ +/** + * @file anastasis_authorization_plugin.c + * @brief Logic to load database plugin + * @author Christian Grothoff + * @author Dominik Meister + */ +#include "platform.h" +#include "anastasis_authorization_plugin.h" +#include <ltdl.h> + + +/** + * Head of linked list for all loaded plugins + */ +static struct AuthPlugin *ap_head; + +/** + * Tail ofinked list for all loaded plugins + */ +static struct AuthPlugin *ap_tail; + + +/** + * Authentication plugin which is used to verify code based authentication + * like SMS, E-Mail. + */ +struct AuthPlugin +{ + /** + * Kept in a DLL. + */ + struct AuthPlugin *next; + + /** + * Kept in a DLL. + */ + struct AuthPlugin *prev; + + /** + * Actual plugin handle. + */ + struct ANASTASIS_AuthorizationPlugin *authorization; + + /** + * I.e. "sms", "phone". + */ + char *name; + + /** + * Name of the shared object providing the plugin logic. + */ + char *lib_name; + + /** + * Cost of using this plugin. + */ + struct TALER_Amount cost; +}; + + +struct ANASTASIS_AuthorizationPlugin * +ANASTASIS_authorization_plugin_load ( + const char *method, + const struct GNUNET_CONFIGURATION_Handle *AH_cfg, + struct TALER_Amount *cost) +{ + struct ANASTASIS_AuthorizationPlugin *authorization; + char *lib_name; + char *sec_name; + struct AuthPlugin *ap; + char *currency; + + for (ap = ap_head; NULL != ap; ap = ap->next) + if (0 == strcmp (method, + ap->name)) + { + *cost = ap->cost; + return ap->authorization; + } + if (GNUNET_OK != + TALER_config_get_currency (AH_cfg, + ¤cy)) + return NULL; + ap = GNUNET_new (struct AuthPlugin); + GNUNET_asprintf (&sec_name, + "authorization-%s", + method); + if (GNUNET_OK != + TALER_config_get_amount (AH_cfg, + sec_name, + "COST", + &ap->cost)) + { + GNUNET_log_config_missing (GNUNET_ERROR_TYPE_WARNING, + sec_name, + "COST"); + GNUNET_free (sec_name); + GNUNET_free (currency); + GNUNET_free (ap); + return NULL; + } + + if (0 != + strcasecmp (currency, + ap->cost.currency)) + { + GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_ERROR, + sec_name, + "COST", + "currency mismatch"); + GNUNET_free (currency); + GNUNET_free (sec_name); + GNUNET_free (ap); + return NULL; + } + GNUNET_free (currency); + GNUNET_free (sec_name); + GNUNET_asprintf (&lib_name, + "libanastasis_plugin_authorization_%s", + method); + authorization = GNUNET_PLUGIN_load (lib_name, + (void *) AH_cfg); + if (NULL == authorization) + { + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + "Authentication method `%s' not supported\n", + method); + GNUNET_free (lib_name); + GNUNET_free (ap); + return NULL; + } + ap->name = GNUNET_strdup (method); + ap->lib_name = lib_name; + ap->authorization = authorization; + GNUNET_CONTAINER_DLL_insert (ap_head, + ap_tail, + ap); + *cost = ap->cost; + return authorization; +} + + +void +ANASTASIS_authorization_plugin_shutdown (void) +{ + struct AuthPlugin *ap; + + while (NULL != (ap = ap_head)) + { + GNUNET_CONTAINER_DLL_remove (ap_head, + ap_tail, + ap); + GNUNET_PLUGIN_unload (ap->lib_name, + ap->authorization); + GNUNET_free (ap->lib_name); + GNUNET_free (ap->name); + GNUNET_free (ap); + } +} + + +/** + * Libtool search path before we started. + */ +static char *old_dlsearchpath; + + +/** + * Setup libtool paths. + */ +void __attribute__ ((constructor)) +anastasis_authorization_plugin_init (void) +{ + int err; + const char *opath; + char *path; + char *cpath; + + err = lt_dlinit (); + if (err > 0) + { + fprintf (stderr, + _ ("Initialization of plugin mechanism failed: %s!\n"), + lt_dlerror ()); + return; + } + opath = lt_dlgetsearchpath (); + if (NULL != opath) + old_dlsearchpath = GNUNET_strdup (opath); + path = GNUNET_OS_installation_get_path (GNUNET_OS_IPK_LIBDIR); + if (NULL != path) + { + if (NULL != opath) + { + GNUNET_asprintf (&cpath, "%s:%s", opath, path); + lt_dlsetsearchpath (cpath); + GNUNET_free (path); + GNUNET_free (cpath); + } + else + { + lt_dlsetsearchpath (path); + GNUNET_free (path); + } + } +} + + +/** + * Shutdown libtool. + */ +void __attribute__ ((destructor)) +anastasis_authorization_plugin_fini (void) +{ + lt_dlsetsearchpath (old_dlsearchpath); + if (NULL != old_dlsearchpath) + { + GNUNET_free (old_dlsearchpath); + } + lt_dlexit (); +} + + +/* end of anastasis_authorization_plugin.c */ |