merchant_api_get_otp_device.c (6096B)
1 /* 2 This file is part of TALER 3 Copyright (C) 2022 Taler Systems SA 4 5 TALER is free software; you can redistribute it and/or modify it under the 6 terms of the GNU Lesser General Public License as published by the Free Software 7 Foundation; either version 2.1, or (at your option) any later version. 8 9 TALER is distributed in the hope that it will be useful, but WITHOUT ANY 10 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR 11 A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. 12 13 You should have received a copy of the GNU Lesser General Public License along with 14 TALER; see the file COPYING.LGPL. If not, see 15 <http://www.gnu.org/licenses/> 16 */ 17 /** 18 * @file merchant_api_get_otp_device.c 19 * @brief Implementation of the GET /otp-devices/$ID request of the merchant's HTTP API 20 * @author Christian Grothoff 21 */ 22 #include "platform.h" 23 #include <curl/curl.h> 24 #include <jansson.h> 25 #include <microhttpd.h> /* just for HTTP status codes */ 26 #include <gnunet/gnunet_util_lib.h> 27 #include <gnunet/gnunet_curl_lib.h> 28 #include "taler_merchant_service.h" 29 #include "merchant_api_curl_defaults.h" 30 #include <taler/taler_json_lib.h> 31 #include <taler/taler_signatures.h> 32 33 34 /** 35 * Handle for a GET /otp-devices/$ID operation. 36 */ 37 struct TALER_MERCHANT_OtpDeviceGetHandle 38 { 39 /** 40 * The url for this request. 41 */ 42 char *url; 43 44 /** 45 * Handle for the request. 46 */ 47 struct GNUNET_CURL_Job *job; 48 49 /** 50 * Function to call with the result. 51 */ 52 TALER_MERCHANT_OtpDeviceGetCallback cb; 53 54 /** 55 * Closure for @a cb. 56 */ 57 void *cb_cls; 58 59 /** 60 * Reference to the execution context. 61 */ 62 struct GNUNET_CURL_Context *ctx; 63 64 }; 65 66 67 /** 68 * Function called when we're done processing the 69 * HTTP GET /otp-devices/$ID request. 70 * 71 * @param cls the `struct TALER_MERCHANT_OtpDeviceGetHandle` 72 * @param response_code HTTP response code, 0 on error 73 * @param response response body, NULL if not in JSON 74 */ 75 static void 76 handle_get_otp_device_finished (void *cls, 77 long response_code, 78 const void *response) 79 { 80 struct TALER_MERCHANT_OtpDeviceGetHandle *tgh = cls; 81 const json_t *json = response; 82 struct TALER_MERCHANT_OtpDeviceGetResponse tgr = { 83 .hr.http_status = (unsigned int) response_code, 84 .hr.reply = json 85 }; 86 87 tgh->job = NULL; 88 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, 89 "Got /otp-devices/$ID response with status code %u\n", 90 (unsigned int) response_code); 91 switch (response_code) 92 { 93 case MHD_HTTP_OK: 94 { 95 uint32_t alg32; 96 struct GNUNET_JSON_Specification spec[] = { 97 GNUNET_JSON_spec_string ("otp_device_description", 98 &tgr.details.ok.otp_device_description), 99 GNUNET_JSON_spec_uint32 ("otp_algorithm", 100 &alg32), 101 GNUNET_JSON_spec_mark_optional ( 102 GNUNET_JSON_spec_uint64 ("otp_ctr", 103 &tgr.details.ok.otp_ctr), 104 NULL), 105 GNUNET_JSON_spec_mark_optional ( 106 GNUNET_JSON_spec_uint64 ("otp_timestamp", 107 &tgr.details.ok.otp_timestamp_s), 108 NULL), 109 GNUNET_JSON_spec_mark_optional ( 110 GNUNET_JSON_spec_string ("otp_code", 111 &tgr.details.ok.otp_code), 112 NULL), 113 GNUNET_JSON_spec_end () 114 }; 115 116 if (GNUNET_OK == 117 GNUNET_JSON_parse (json, 118 spec, 119 NULL, NULL)) 120 { 121 tgr.details.ok.otp_alg = 122 (enum TALER_MerchantConfirmationAlgorithm) alg32; 123 tgh->cb (tgh->cb_cls, 124 &tgr); 125 TALER_MERCHANT_otp_device_get_cancel (tgh); 126 return; 127 } 128 tgr.hr.http_status = 0; 129 tgr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE; 130 break; 131 } 132 case MHD_HTTP_UNAUTHORIZED: 133 tgr.hr.ec = TALER_JSON_get_error_code (json); 134 tgr.hr.hint = TALER_JSON_get_error_hint (json); 135 /* Nothing really to verify, merchant says we need to authenticate. */ 136 break; 137 case MHD_HTTP_NOT_FOUND: 138 tgr.hr.ec = TALER_JSON_get_error_code (json); 139 tgr.hr.hint = TALER_JSON_get_error_hint (json); 140 break; 141 default: 142 /* unexpected response code */ 143 tgr.hr.ec = TALER_JSON_get_error_code (json); 144 tgr.hr.hint = TALER_JSON_get_error_hint (json); 145 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, 146 "Unexpected response code %u/%d\n", 147 (unsigned int) response_code, 148 (int) tgr.hr.ec); 149 break; 150 } 151 tgh->cb (tgh->cb_cls, 152 &tgr); 153 TALER_MERCHANT_otp_device_get_cancel (tgh); 154 } 155 156 157 struct TALER_MERCHANT_OtpDeviceGetHandle * 158 TALER_MERCHANT_otp_device_get ( 159 struct GNUNET_CURL_Context *ctx, 160 const char *backend_url, 161 const char *otp_device_id, 162 TALER_MERCHANT_OtpDeviceGetCallback cb, 163 void *cb_cls) 164 { 165 struct TALER_MERCHANT_OtpDeviceGetHandle *tgh; 166 CURL *eh; 167 168 tgh = GNUNET_new (struct TALER_MERCHANT_OtpDeviceGetHandle); 169 tgh->ctx = ctx; 170 tgh->cb = cb; 171 tgh->cb_cls = cb_cls; 172 { 173 char *path; 174 175 GNUNET_asprintf (&path, 176 "private/otp-devices/%s", 177 otp_device_id); 178 tgh->url = TALER_url_join (backend_url, 179 path, 180 NULL); 181 GNUNET_free (path); 182 } 183 if (NULL == tgh->url) 184 { 185 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, 186 "Could not construct request URL.\n"); 187 GNUNET_free (tgh); 188 return NULL; 189 } 190 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, 191 "Requesting URL '%s'\n", 192 tgh->url); 193 eh = TALER_MERCHANT_curl_easy_get_ (tgh->url); 194 tgh->job = GNUNET_CURL_job_add (ctx, 195 eh, 196 &handle_get_otp_device_finished, 197 tgh); 198 return tgh; 199 } 200 201 202 void 203 TALER_MERCHANT_otp_device_get_cancel ( 204 struct TALER_MERCHANT_OtpDeviceGetHandle *tgh) 205 { 206 if (NULL != tgh->job) 207 GNUNET_CURL_job_cancel (tgh->job); 208 GNUNET_free (tgh->url); 209 GNUNET_free (tgh); 210 }