diff options
Diffstat (limited to 'src/mint/taler-mint-httpd_validation.c')
| -rw-r--r-- | src/mint/taler-mint-httpd_validation.c | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/src/mint/taler-mint-httpd_validation.c b/src/mint/taler-mint-httpd_validation.c new file mode 100644 index 000000000..461e88759 --- /dev/null +++ b/src/mint/taler-mint-httpd_validation.c @@ -0,0 +1,231 @@ +/* + This file is part of TALER + Copyright (C) 2016 GNUnet e.V. + + TALER is free software; you can redistribute it and/or modify it under the + terms of the GNU Affero 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 Affero General Public License for more details. + + You should have received a copy of the GNU Affero General Public License along with + TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/> +*/ + +/** + * @file taler-mint-httpd_validation.c + * @brief helpers for calling the wire plugins to validate addresses + * @author Christian Grothoff + */ +#include "platform.h" +#include <gnunet/gnunet_util_lib.h> +#include "taler-mint-httpd_validation.h" +#include "taler_wire_plugin.h" + + +/** + * Information we keep for each plugin. + */ +struct Plugin +{ + + /** + * We keep plugins in a DLL. + */ + struct Plugin *next; + + /** + * We keep plugins in a DLL. + */ + struct Plugin *prev; + + /** + * Type of the wireformat. + */ + char *type; + + /** + * Pointer to the plugin. + */ + struct TALER_WIRE_Plugin *plugin; + +}; + +/** + * Head of DLL of wire plugins. + */ +static struct Plugin *wire_head; + +/** + * Tail of DLL of wire plugins. + */ +static struct Plugin *wire_tail; + + +/** + * Initialize validation subsystem. + * + * @param cfg configuration to use + * @return #GNUNET_OK on success + */ +int +TMH_VALIDATION_init (const struct GNUNET_CONFIGURATION_Handle *cfg) +{ + struct Plugin *p; + char *wireformats; + char *lib_name; + const char *token; + + /* Find out list of supported wire formats */ + if (GNUNET_OK != + GNUNET_CONFIGURATION_get_value_string (cfg, + "mint", + "wireformat", + &wireformats)) + { + GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR, + "mint", + "wireformat"); + return GNUNET_SYSERR; + } + for (token = strtok (wireformats, + " "); + NULL != token; + token = strtok (NULL, + " ")) + { + (void) GNUNET_asprintf (&lib_name, + "libtaler_plugin_wire_%s", + lib_name); + p = GNUNET_new (struct Plugin); + p->type = GNUNET_strdup (token); + p->plugin = GNUNET_PLUGIN_load (lib_name, + (void *) cfg); + if (NULL == p->plugin) + { + GNUNET_free (p); + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + "Failed to load plugin %s\n", + lib_name); + GNUNET_free (lib_name); + TMH_VALIDATION_done (); + return GNUNET_SYSERR; + } + p->plugin->library_name = lib_name; + GNUNET_CONTAINER_DLL_insert (wire_head, + wire_tail, + p); + } + GNUNET_free (wireformats); + return GNUNET_OK; +} + + +/** + * Shutdown validation subsystem. + */ +void +TMH_VALIDATION_done () +{ + struct Plugin *p; + char *lib_name; + + while (NULL != (p = wire_head)) + { + GNUNET_CONTAINER_DLL_remove (wire_head, + wire_tail, + p); + lib_name = p->plugin->library_name; + GNUNET_assert (NULL == GNUNET_PLUGIN_unload (lib_name, + p->plugin)); + GNUNET_free (lib_name); + GNUNET_free (p->type); + GNUNET_free (p); + } +} + + +/** + * Check if the given wire format JSON object is correctly formatted as + * a wire address. + * + * @param wire the JSON wire format object + * @return #GNUNET_YES if correctly formatted; #GNUNET_NO if not + */ +int +TMH_json_validate_wireformat (const json_t *wire) +{ + const char *stype; + json_error_t error; + struct Plugin *p; + + if (0 != json_unpack_ex ((json_t *) wire, + &error, 0, + "{s:s}", + "type", &stype)) + { + GNUNET_break (0); + return GNUNET_SYSERR; + } + for (p=wire_head; NULL != p; p = p->next) + if (0 == strcasecmp (p->type, + stype)) + return p->plugin->wire_validate (wire); + return GNUNET_NO; +} + + +/** + * Check if we support the given wire method. + * + * @param type type of wire method to check + * @return #GNUNET_YES if the method is supported + */ +int +TMH_VALIDATION_test_method (const char *type) +{ + struct Plugin *p; + + for (p=wire_head;NULL != p;p = p->next) + if (0 == strcasecmp (type, + p->type)) + return GNUNET_YES; + return GNUNET_NO; +} + + +/** + * Obtain supported validation methods as a JSON array, + * and as a hash. + * + * @param[out] h set to the hash of the JSON methods + * @return JSON array with the supported validation methods + */ +json_t * +TMH_VALIDATION_get_methods (struct GNUNET_HashCode *h) +{ + json_t *methods; + struct GNUNET_HashContext *hc; + const char *wf; + struct Plugin *p; + + methods = json_array (); + hc = GNUNET_CRYPTO_hash_context_start (); + for (p=wire_head;NULL != p;p = p->next) + { + wf = p->type; + json_array_append_new (methods, + json_string (wf)); + GNUNET_CRYPTO_hash_context_read (hc, + wf, + strlen (wf) + 1); + } + GNUNET_CRYPTO_hash_context_finish (hc, + h); + return methods; +} + + +/* end of taler-mint-httpd_validation.c */ |