diff options
Diffstat (limited to 'src/lib/exchange_api_auditor_add_denomination.c')
| -rw-r--r-- | src/lib/exchange_api_auditor_add_denomination.c | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/src/lib/exchange_api_auditor_add_denomination.c b/src/lib/exchange_api_auditor_add_denomination.c new file mode 100644 index 000000000..89de0d7f1 --- /dev/null +++ b/src/lib/exchange_api_auditor_add_denomination.c @@ -0,0 +1,238 @@ +/* + This file is part of TALER + Copyright (C) 2015-2021 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 lib/exchange_api_auditor_add_denomination.c + * @brief functions for the auditor to add its signature for denomination at the exchange + * @author Christian Grothoff + */ +#include "platform.h" +#include "taler_json_lib.h" +#include <gnunet/gnunet_curl_lib.h> +#include "taler_exchange_service.h" +#include "auditor_api_curl_defaults.h" +#include "taler_signatures.h" +#include "taler_curl_lib.h" +#include "taler_json_lib.h" + + +struct TALER_EXCHANGE_AuditorAddDenominationHandle +{ + + /** + * The url for this request. + */ + char *url; + + /** + * Minor context that holds body and headers. + */ + struct TALER_CURL_PostContext post_ctx; + + /** + * Handle for the request. + */ + struct GNUNET_CURL_Job *job; + + /** + * Function to call with the result. + */ + TALER_EXCHANGE_AuditorAddDenominationCallback cb; + + /** + * Closure for @a cb. + */ + void *cb_cls; + + /** + * Reference to the execution context. + */ + struct GNUNET_CURL_Context *ctx; +}; + + +/** + * Function called when we're done processing the + * HTTP POST /auditor/$AUDITOR_PUB/$H_DENOM_PUB request. + * + * @param cls the `struct TALER_EXCHANGE_AuditorAddDenominationHandle *` + * @param response_code HTTP response code, 0 on error + * @param response response body, NULL if not in JSON + */ +static void +handle_auditor_add_denomination_finished (void *cls, + long response_code, + const void *response) +{ + struct TALER_EXCHANGE_AuditorAddDenominationHandle *ah = cls; + const json_t *json = response; + struct TALER_EXCHANGE_AuditorAddDenominationResponse adr = { + .hr.http_status = (unsigned int) response_code, + .hr.reply = json + }; + + ah->job = NULL; + switch (response_code) + { + case MHD_HTTP_NO_CONTENT: + break; + case MHD_HTTP_FORBIDDEN: + adr.hr.ec = TALER_JSON_get_error_code (json); + adr.hr.hint = TALER_JSON_get_error_hint (json); + break; + case MHD_HTTP_NOT_FOUND: + adr.hr.ec = TALER_JSON_get_error_code (json); + adr.hr.hint = TALER_JSON_get_error_hint (json); + break; + case MHD_HTTP_GONE: + adr.hr.ec = TALER_JSON_get_error_code (json); + adr.hr.hint = TALER_JSON_get_error_hint (json); + break; + case MHD_HTTP_PRECONDITION_FAILED: + adr.hr.ec = TALER_JSON_get_error_code (json); + adr.hr.hint = TALER_JSON_get_error_hint (json); + break; + default: + /* unexpected response code */ + if (NULL != json) + { + adr.hr.ec = TALER_JSON_get_error_code (json); + adr.hr.hint = TALER_JSON_get_error_hint (json); + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + "Unexpected response code %u/%d for exchange auditor-add-denomination at URL `%s'\n", + (unsigned int) response_code, + (int) adr.hr.ec, + ah->url); + } + else + { + adr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE; + adr.hr.hint = NULL; + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + "Unexpected HTTP response code %u (no JSON returned) at URL `%s'\n", + (unsigned int) response_code, + ah->url); + } + break; + } + if (NULL != ah->cb) + { + ah->cb (ah->cb_cls, + &adr); + ah->cb = NULL; + } + TALER_EXCHANGE_add_auditor_denomination_cancel (ah); +} + + +struct TALER_EXCHANGE_AuditorAddDenominationHandle * +TALER_EXCHANGE_add_auditor_denomination ( + struct GNUNET_CURL_Context *ctx, + const char *url, + const struct TALER_DenominationHashP *h_denom_pub, + const struct TALER_AuditorPublicKeyP *auditor_pub, + const struct TALER_AuditorSignatureP *auditor_sig, + TALER_EXCHANGE_AuditorAddDenominationCallback cb, + void *cb_cls) +{ + struct TALER_EXCHANGE_AuditorAddDenominationHandle *ah; + CURL *eh; + json_t *body; + + ah = GNUNET_new (struct TALER_EXCHANGE_AuditorAddDenominationHandle); + ah->cb = cb; + ah->cb_cls = cb_cls; + ah->ctx = ctx; + { + char apub_str[sizeof (*auditor_pub) * 2]; + char denom_str[sizeof (*h_denom_pub) * 2]; + char arg_str[sizeof (apub_str) + sizeof (denom_str) + 32]; + char *end; + + end = GNUNET_STRINGS_data_to_string (auditor_pub, + sizeof (*auditor_pub), + apub_str, + sizeof (apub_str)); + *end = '\0'; + end = GNUNET_STRINGS_data_to_string (h_denom_pub, + sizeof (*h_denom_pub), + denom_str, + sizeof (denom_str)); + *end = '\0'; + GNUNET_snprintf (arg_str, + sizeof (arg_str), + "auditors/%s/%s", + apub_str, + denom_str); + ah->url = TALER_url_join (url, + arg_str, + NULL); + } + if (NULL == ah->url) + { + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + "Could not construct request URL.\n"); + GNUNET_free (ah); + return NULL; + } + body = GNUNET_JSON_PACK ( + GNUNET_JSON_pack_data_auto ("auditor_sig", + auditor_sig)); + eh = TALER_AUDITOR_curl_easy_get_ (ah->url); + if ( (NULL == eh) || + (GNUNET_OK != + TALER_curl_easy_post (&ah->post_ctx, + eh, + body)) ) + { + GNUNET_break (0); + if (NULL != eh) + curl_easy_cleanup (eh); + json_decref (body); + GNUNET_free (ah->url); + return NULL; + } + json_decref (body); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "Requesting URL '%s'\n", + ah->url); + ah->job = GNUNET_CURL_job_add2 (ctx, + eh, + ah->post_ctx.headers, + &handle_auditor_add_denomination_finished, + ah); + if (NULL == ah->job) + { + TALER_EXCHANGE_add_auditor_denomination_cancel (ah); + return NULL; + } + return ah; +} + + +void +TALER_EXCHANGE_add_auditor_denomination_cancel ( + struct TALER_EXCHANGE_AuditorAddDenominationHandle *ah) +{ + if (NULL != ah->job) + { + GNUNET_CURL_job_cancel (ah->job); + ah->job = NULL; + } + TALER_curl_easy_post_finished (&ah->post_ctx); + GNUNET_free (ah->url); + GNUNET_free (ah); +} |