diff options
Diffstat (limited to 'src/lib/exchange_api_kyc_proof.c')
| -rw-r--r-- | src/lib/exchange_api_kyc_proof.c | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/src/lib/exchange_api_kyc_proof.c b/src/lib/exchange_api_kyc_proof.c new file mode 100644 index 000000000..e7cc9c4cf --- /dev/null +++ b/src/lib/exchange_api_kyc_proof.c @@ -0,0 +1,217 @@ +/* + 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 lib/exchange_api_kyc_proof.c + * @brief Implementation of the /kyc-proof request + * @author Christian Grothoff + */ +#include "platform.h" +#include <microhttpd.h> /* just for HTTP proof codes */ +#include <gnunet/gnunet_util_lib.h> +#include <gnunet/gnunet_curl_lib.h> +#include "taler_exchange_service.h" +#include "taler_json_lib.h" +#include "exchange_api_handle.h" +#include "taler_signatures.h" +#include "exchange_api_curl_defaults.h" + + +/** + * @brief A ``/kyc-proof`` handle + */ +struct TALER_EXCHANGE_KycProofHandle +{ + + /** + * The url for this request. + */ + char *url; + + /** + * Handle to our CURL request. + */ + CURL *eh; + + /** + * Handle for the request. + */ + struct GNUNET_CURL_Job *job; + + /** + * Function to call with the result. + */ + TALER_EXCHANGE_KycProofCallback cb; + + /** + * Closure for @e cb. + */ + void *cb_cls; + +}; + + +/** + * Function called when we're done processing the + * HTTP /kyc-proof request. + * + * @param cls the `struct TALER_EXCHANGE_KycProofHandle` + * @param response_code HTTP response code, 0 on error + * @param body response body + * @param body_size number of bytes in @a body + */ +static void +handle_kyc_proof_finished (void *cls, + long response_code, + const void *body, + size_t body_size) +{ + struct TALER_EXCHANGE_KycProofHandle *kph = cls; + struct TALER_EXCHANGE_KycProofResponse kpr = { + .http_status = (unsigned int) response_code + }; + + (void) body; + (void) body_size; + kph->job = NULL; + switch (response_code) + { + case 0: + break; + case MHD_HTTP_SEE_OTHER: + { + char *redirect_url; + + GNUNET_assert (CURLE_OK == + curl_easy_getinfo (kph->eh, + CURLINFO_REDIRECT_URL, + &redirect_url)); + kpr.details.found.redirect_url = redirect_url; + break; + } + case MHD_HTTP_BAD_REQUEST: + /* This should never happen, either us or the exchange is buggy + (or API version conflict); just pass JSON reply to the application */ + break; + case MHD_HTTP_UNAUTHORIZED: + break; + case MHD_HTTP_FORBIDDEN: + break; + case MHD_HTTP_NOT_FOUND: + break; + case MHD_HTTP_BAD_GATEWAY: + /* Server had an internal issue; we should retry, but this API + leaves this to the application */ + break; + case MHD_HTTP_GATEWAY_TIMEOUT: + /* Server had an internal issue; we should retry, but this API + leaves this to the application */ + break; + default: + /* unexpected response code */ + GNUNET_break_op (0); + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + "Unexpected response code %u for exchange kyc_proof\n", + (unsigned int) response_code); + break; + } + kph->cb (kph->cb_cls, + &kpr); + TALER_EXCHANGE_kyc_proof_cancel (kph); +} + + +struct TALER_EXCHANGE_KycProofHandle * +TALER_EXCHANGE_kyc_proof ( + struct GNUNET_CURL_Context *ctx, + const char *url, + const struct TALER_PaytoHashP *h_payto, + const char *logic, + const char *args, + TALER_EXCHANGE_KycProofCallback cb, + void *cb_cls) +{ + struct TALER_EXCHANGE_KycProofHandle *kph; + char *arg_str; + + if (NULL == args) + args = ""; + else + GNUNET_assert (args[0] == '&'); + { + char hstr[sizeof (struct TALER_PaytoHashP) * 2]; + char *end; + + end = GNUNET_STRINGS_data_to_string (h_payto, + sizeof (*h_payto), + hstr, + sizeof (hstr)); + *end = '\0'; + GNUNET_asprintf (&arg_str, + "kyc-proof/%s?state=%s%s", + logic, + hstr, + args); + } + kph = GNUNET_new (struct TALER_EXCHANGE_KycProofHandle); + kph->cb = cb; + kph->cb_cls = cb_cls; + kph->url = TALER_url_join (url, + arg_str, + NULL); + GNUNET_free (arg_str); + if (NULL == kph->url) + { + GNUNET_free (kph); + return NULL; + } + kph->eh = TALER_EXCHANGE_curl_easy_get_ (kph->url); + if (NULL == kph->eh) + { + GNUNET_break (0); + GNUNET_free (kph->url); + GNUNET_free (kph); + return NULL; + } + /* disable location following, we want to learn the + result of a 303 redirect! */ + GNUNET_assert (CURLE_OK == + curl_easy_setopt (kph->eh, + CURLOPT_FOLLOWLOCATION, + 0L)); + kph->job = GNUNET_CURL_job_add_raw (ctx, + kph->eh, + NULL, + &handle_kyc_proof_finished, + kph); + return kph; +} + + +void +TALER_EXCHANGE_kyc_proof_cancel (struct TALER_EXCHANGE_KycProofHandle *kph) +{ + if (NULL != kph->job) + { + GNUNET_CURL_job_cancel (kph->job); + kph->job = NULL; + } + GNUNET_free (kph->url); + GNUNET_free (kph); +} + + +/* end of exchange_api_kyc_proof.c */ |