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Diffstat (limited to 'src/extensions/extension_age_restriction.c')
| -rw-r--r-- | src/extensions/extension_age_restriction.c | 403 |
1 files changed, 0 insertions, 403 deletions
diff --git a/src/extensions/extension_age_restriction.c b/src/extensions/extension_age_restriction.c deleted file mode 100644 index 7937f61ad..000000000 --- a/src/extensions/extension_age_restriction.c +++ /dev/null @@ -1,403 +0,0 @@ -/* - This file is part of TALER - Copyright (C) 2021-2022 Taler Systems SA - - TALER is free software; you can redistribute it and/or modify it under the - terms of the GNU 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 extension_age_restriction.c - * @brief Utility functions regarding age restriction - * @author Özgür Kesim - */ -#include "platform.h" -#include "taler_util.h" -#include "taler_extensions.h" -#include "stdint.h" - -/** - * Carries all the information we need for age restriction - */ -struct age_restriction_config -{ - struct TALER_AgeMask mask; - size_t num_groups; -}; - -/** - * Global config for this extension - */ -static struct age_restriction_config TE_age_restriction_config = {0}; - -enum GNUNET_GenericReturnValue -TALER_parse_age_group_string ( - const char *groups, - struct TALER_AgeMask *mask) -{ - - const char *pos = groups; - unsigned int prev = 0; - unsigned int val = 0; - char c; - - while (*pos) - { - c = *pos++; - if (':' == c) - { - if (prev >= val) - return GNUNET_SYSERR; - - mask->bits |= 1 << val; - prev = val; - val = 0; - continue; - } - - if ('0'>c || '9'<c) - return GNUNET_SYSERR; - - val = 10 * val + c - '0'; - - if (0>=val || 32<=val) - return GNUNET_SYSERR; - } - - if (32<=val || prev>=val) - return GNUNET_SYSERR; - - mask->bits |= (1 << val); - mask->bits |= 1; // mark zeroth group, too - - return GNUNET_OK; -} - - -char * -TALER_age_mask_to_string ( - const struct TALER_AgeMask *mask) -{ - uint32_t bits = mask->bits; - unsigned int n = 0; - char *buf = GNUNET_malloc (32 * 3); // max characters possible - char *pos = buf; - - if (NULL == buf) - { - return buf; - } - - while (bits != 0) - { - bits >>= 1; - n++; - if (0 == (bits & 1)) - { - continue; - } - - if (n > 9) - { - *(pos++) = '0' + n / 10; - } - *(pos++) = '0' + n % 10; - - if (0 != (bits >> 1)) - { - *(pos++) = ':'; - } - } - return buf; -} - - -/* ================================================== - * - * Age Restriction TALER_Extension implementation - * - * ================================================== - */ - -/** - * @brief implements the TALER_Extension.disable interface. - * - * @param ext Pointer to the current extension - */ -void -age_restriction_disable ( - struct TALER_Extension *ext) -{ - if (NULL == ext) - return; - - ext->config = NULL; - - if (NULL != ext->config_json) - { - json_decref (ext->config_json); - ext->config_json = NULL; - } - - TE_age_restriction_config.mask.bits = 0; - TE_age_restriction_config.num_groups = 0; -} - - -/** - * @brief implements the TALER_Extension.load_taler_config interface. - * - * @param ext Pointer to the current extension - * @param cfg Handle to the GNUNET configuration - * @return Error if extension for age restriction was set, but age groups were - * invalid, OK otherwise. - */ -static enum GNUNET_GenericReturnValue -age_restriction_load_taler_config ( - struct TALER_Extension *ext, - const struct GNUNET_CONFIGURATION_Handle *cfg) -{ - char *groups = NULL; - enum GNUNET_GenericReturnValue ret = GNUNET_SYSERR; - struct TALER_AgeMask mask = {0}; - - if ((GNUNET_YES != - GNUNET_CONFIGURATION_have_value (cfg, - TALER_EXTENSION_SECTION_AGE_RESTRICTION, - "ENABLED")) - || - (GNUNET_YES != - GNUNET_CONFIGURATION_get_value_yesno (cfg, - TALER_EXTENSION_SECTION_AGE_RESTRICTION, - "ENABLED"))) - { - /* Age restriction is not enabled */ - ext->config = NULL; - ext->config_json = NULL; - return GNUNET_OK; - } - - /* Age restriction is enabled, extract age groups */ - if ((GNUNET_YES == - GNUNET_CONFIGURATION_have_value (cfg, - TALER_EXTENSION_SECTION_AGE_RESTRICTION, - "AGE_GROUPS")) - && - (GNUNET_YES != - GNUNET_CONFIGURATION_get_value_string (cfg, - TALER_EXTENSION_SECTION_AGE_RESTRICTION, - "AGE_GROUPS", - &groups))) - return GNUNET_SYSERR; - - - mask.bits = TALER_EXTENSION_AGE_RESTRICTION_DEFAULT_AGE_MASK; - ret = GNUNET_OK; - - if (groups != NULL) - { - ret = TALER_parse_age_group_string (groups, &mask); - if (GNUNET_OK != ret) - mask.bits = TALER_EXTENSION_AGE_RESTRICTION_DEFAULT_AGE_MASK; - } - - if (GNUNET_OK == ret) - { - GNUNET_log (GNUNET_ERROR_TYPE_INFO, - "setting age mask to %x with #groups: %d\n", mask.bits, - __builtin_popcount (mask.bits) - 1); - TE_age_restriction_config.mask.bits = mask.bits; - TE_age_restriction_config.num_groups = __builtin_popcount (mask.bits) - 1; /* no underflow, first bit always set */ - ext->config = &TE_age_restriction_config; - - /* Note: we do now have TE_age_restriction_config set, however - * ext->config_json is NOT set, i.e. the extension is not yet active! For - * age restriction to become active, load_json_config must have been - * called. */ - } - - - GNUNET_free (groups); - return ret; -} - - -/** - * @brief implements the TALER_Extension.load_json_config interface. - * - * @param ext if NULL, only tests the configuration - * @param jconfig the configuration as json - */ -static enum GNUNET_GenericReturnValue -age_restriction_load_json_config ( - struct TALER_Extension *ext, - json_t *jconfig) -{ - struct TALER_AgeMask mask = {0}; - enum GNUNET_GenericReturnValue ret; - - ret = TALER_JSON_parse_age_groups (jconfig, &mask); - if (GNUNET_OK != ret) - return ret; - - /* only testing the parser */ - if (ext == NULL) - return GNUNET_OK; - - if (TALER_Extension_AgeRestriction != ext->type) - return GNUNET_SYSERR; - - TE_age_restriction_config.mask.bits = mask.bits; - TE_age_restriction_config.num_groups = 0; - - if (mask.bits > 0) - { - /* if the mask is not zero, the first bit MUST be set */ - if (0 == (mask.bits & 1)) - return GNUNET_SYSERR; - - TE_age_restriction_config.num_groups = __builtin_popcount (mask.bits) - 1; - } - - ext->config = &TE_age_restriction_config; - - if (NULL != ext->config_json) - json_decref (ext->config_json); - - ext->config_json = jconfig; - - GNUNET_log (GNUNET_ERROR_TYPE_WARNING, - "loaded new age restriction config with age groups: %s\n", - TALER_age_mask_to_string (&mask)); - - return GNUNET_OK; -} - - -/** - * @brief implements the TALER_Extension.load_json_config interface. - * - * @param ext if NULL, only tests the configuration - * @return configuration as json_t* object - */ -json_t * -age_restriction_config_to_json ( - const struct TALER_Extension *ext) -{ - char *mask_str; - json_t *conf; - - GNUNET_assert (NULL != ext); - GNUNET_assert (NULL != ext->config); - - if (NULL != ext->config_json) - { - return json_copy (ext->config_json); - } - - mask_str = TALER_age_mask_to_string (&TE_age_restriction_config.mask); - conf = GNUNET_JSON_PACK ( - GNUNET_JSON_pack_string ("age_groups", mask_str) - ); - - return GNUNET_JSON_PACK ( - GNUNET_JSON_pack_bool ("critical", ext->critical), - GNUNET_JSON_pack_string ("version", ext->version), - GNUNET_JSON_pack_object_steal ("config", conf) - ); -} - - -/** - * @brief implements the TALER_Extension.test_json_config interface. - * - * @param config configuration as json_t* to test - * @return #GNUNET_OK on success, #GNUNET_SYSERR otherwise. - */ -static enum GNUNET_GenericReturnValue -age_restriction_test_json_config ( - const json_t *config) -{ - struct TALER_AgeMask mask = {0}; - - return TALER_JSON_parse_age_groups (config, &mask); -} - - -/* The extension for age restriction */ -struct TALER_Extension TE_age_restriction = { - .next = NULL, - .type = TALER_Extension_AgeRestriction, - .name = "age_restriction", - .critical = false, - .version = "1", - .config = NULL, // disabled per default - .config_json = NULL, - .disable = &age_restriction_disable, - .test_json_config = &age_restriction_test_json_config, - .load_json_config = &age_restriction_load_json_config, - .config_to_json = &age_restriction_config_to_json, - .load_taler_config = &age_restriction_load_taler_config, -}; - -enum GNUNET_GenericReturnValue -TALER_extension_age_restriction_register () -{ - return TALER_extensions_add (&TE_age_restriction); -} - - -bool -TALER_extensions_age_restriction_is_configured () -{ - return (0 != TE_age_restriction_config.mask.bits); -} - - -struct TALER_AgeMask -TALER_extensions_age_restriction_ageMask () -{ - return TE_age_restriction_config.mask; -} - - -size_t -TALER_extensions_age_restriction_num_groups () -{ - return TE_age_restriction_config.num_groups; -} - - -enum GNUNET_GenericReturnValue -TALER_JSON_parse_age_groups (const json_t *root, - struct TALER_AgeMask *mask) -{ - enum GNUNET_GenericReturnValue ret; - const char *str; - struct GNUNET_JSON_Specification spec[] = { - GNUNET_JSON_spec_string ("age_groups", - &str), - GNUNET_JSON_spec_end () - }; - - ret = GNUNET_JSON_parse (root, - spec, - NULL, - NULL); - if (GNUNET_OK == ret) - TALER_parse_age_group_string (str, mask); - - GNUNET_JSON_parse_free (spec); - - return ret; -} - - -/* end of extension_age_restriction.c */ |