Line data Source code
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
6 : it under the terms of the GNU Lesser General Public License as
7 : published by the Free Software Foundation; either version 2.1,
8 : or (at your option) any later version.
9 :
10 : TALER is distributed in the hope that it will be useful,
11 : but WITHOUT ANY WARRANTY; without even the implied warranty of
12 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 : GNU Lesser General Public License for more details.
14 :
15 : You should have received a copy of the GNU Lesser General
16 : Public License along with TALER; see the file COPYING.LGPL.
17 : If not, see <http://www.gnu.org/licenses/>
18 : */
19 : /**
20 : * @file merchant_api_post_otp_devices.c
21 : * @brief Implementation of the POST /otp-devices request
22 : * of the merchant's HTTP API
23 : * @author Christian Grothoff
24 : */
25 : #include "platform.h"
26 : #include <curl/curl.h>
27 : #include <jansson.h>
28 : #include <microhttpd.h> /* just for HTTP status codes */
29 : #include <gnunet/gnunet_util_lib.h>
30 : #include "taler_merchant_service.h"
31 : #include "merchant_api_curl_defaults.h"
32 : #include "merchant_api_common.h"
33 : #include <taler/taler_json_lib.h>
34 : #include <taler/taler_curl_lib.h>
35 :
36 :
37 : /**
38 : * Handle for a POST /otp-devices/$ID operation.
39 : */
40 : struct TALER_MERCHANT_OtpDevicesPostHandle
41 : {
42 :
43 : /**
44 : * The url for this request.
45 : */
46 : char *url;
47 :
48 : /**
49 : * Handle for the request.
50 : */
51 : struct GNUNET_CURL_Job *job;
52 :
53 : /**
54 : * Function to call with the result.
55 : */
56 : TALER_MERCHANT_OtpDevicesPostCallback cb;
57 :
58 : /**
59 : * Closure for @a cb.
60 : */
61 : void *cb_cls;
62 :
63 : /**
64 : * Reference to the execution context.
65 : */
66 : struct GNUNET_CURL_Context *ctx;
67 :
68 : /**
69 : * Minor context that holds body and headers.
70 : */
71 : struct TALER_CURL_PostContext post_ctx;
72 : };
73 :
74 :
75 : /**
76 : * Function called when we're done processing the
77 : * HTTP POST /otp-devices request.
78 : *
79 : * @param cls the `struct TALER_MERCHANT_OtpDevicesPostHandle`
80 : * @param response_code HTTP response code, 0 on error
81 : * @param response response body, NULL if not in JSON
82 : */
83 : static void
84 4 : handle_post_otp_devices_finished (void *cls,
85 : long response_code,
86 : const void *response)
87 : {
88 4 : struct TALER_MERCHANT_OtpDevicesPostHandle *tph = cls;
89 4 : const json_t *json = response;
90 4 : struct TALER_MERCHANT_HttpResponse hr = {
91 4 : .http_status = (unsigned int) response_code,
92 : .reply = json
93 : };
94 :
95 4 : tph->job = NULL;
96 4 : GNUNET_log (GNUNET_ERROR_TYPE_INFO,
97 : "POST /otp-devices completed with response code %u\n",
98 : (unsigned int) response_code);
99 4 : switch (response_code)
100 : {
101 0 : case 0:
102 0 : hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
103 0 : break;
104 4 : case MHD_HTTP_NO_CONTENT:
105 4 : break;
106 0 : case MHD_HTTP_BAD_REQUEST:
107 0 : hr.ec = TALER_JSON_get_error_code (json);
108 0 : hr.hint = TALER_JSON_get_error_hint (json);
109 : /* This should never happen, either us
110 : * or the merchant is buggy (or API version conflict);
111 : * just pass JSON reply to the application */
112 0 : break;
113 0 : case MHD_HTTP_UNAUTHORIZED:
114 0 : hr.ec = TALER_JSON_get_error_code (json);
115 0 : hr.hint = TALER_JSON_get_error_hint (json);
116 : /* Nothing really to verify, merchant says we need to authenticate. */
117 0 : break;
118 0 : case MHD_HTTP_FORBIDDEN:
119 0 : hr.ec = TALER_JSON_get_error_code (json);
120 0 : hr.hint = TALER_JSON_get_error_hint (json);
121 : /* Nothing really to verify, merchant says we tried to abort the payment
122 : * after it was successful. We should pass the JSON reply to the
123 : * application */
124 0 : break;
125 0 : case MHD_HTTP_NOT_FOUND:
126 0 : hr.ec = TALER_JSON_get_error_code (json);
127 0 : hr.hint = TALER_JSON_get_error_hint (json);
128 : /* Nothing really to verify, this should never
129 : happen, we should pass the JSON reply to the
130 : application */
131 0 : break;
132 0 : case MHD_HTTP_CONFLICT:
133 0 : hr.ec = TALER_JSON_get_error_code (json);
134 0 : hr.hint = TALER_JSON_get_error_hint (json);
135 0 : break;
136 0 : case MHD_HTTP_INTERNAL_SERVER_ERROR:
137 0 : hr.ec = TALER_JSON_get_error_code (json);
138 0 : hr.hint = TALER_JSON_get_error_hint (json);
139 : /* Server had an internal issue; we should retry,
140 : but this API leaves this to the application */
141 0 : break;
142 0 : default:
143 0 : TALER_MERCHANT_parse_error_details_ (json,
144 : response_code,
145 : &hr);
146 : /* unexpected response code */
147 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
148 : "Unexpected response code %u/%d\n",
149 : (unsigned int) response_code,
150 : (int) hr.ec);
151 0 : GNUNET_break_op (0);
152 0 : break;
153 : }
154 4 : tph->cb (tph->cb_cls,
155 : &hr);
156 4 : TALER_MERCHANT_otp_devices_post_cancel (tph);
157 4 : }
158 :
159 :
160 : struct TALER_MERCHANT_OtpDevicesPostHandle *
161 4 : TALER_MERCHANT_otp_devices_post (
162 : struct GNUNET_CURL_Context *ctx,
163 : const char *backend_url,
164 : const char *otp_device_id,
165 : const char *otp_device_description,
166 : const char *otp_key,
167 : enum TALER_MerchantConfirmationAlgorithm otp_algorithm,
168 : uint64_t otp_ctr,
169 : TALER_MERCHANT_OtpDevicesPostCallback cb,
170 : void *cb_cls)
171 : {
172 : struct TALER_MERCHANT_OtpDevicesPostHandle *tph;
173 : json_t *req_obj;
174 :
175 4 : req_obj = GNUNET_JSON_PACK (
176 : GNUNET_JSON_pack_string ("otp_device_id",
177 : otp_device_id),
178 : GNUNET_JSON_pack_string ("otp_device_description",
179 : otp_device_description),
180 : GNUNET_JSON_pack_uint64 ("otp_algorithm",
181 : (uint32_t) otp_algorithm),
182 : GNUNET_JSON_pack_allow_null (
183 : GNUNET_JSON_pack_string ("otp_key",
184 : otp_key)),
185 : GNUNET_JSON_pack_uint64 ("otp_ctr",
186 : otp_ctr));
187 4 : tph = GNUNET_new (struct TALER_MERCHANT_OtpDevicesPostHandle);
188 4 : tph->ctx = ctx;
189 4 : tph->cb = cb;
190 4 : tph->cb_cls = cb_cls;
191 4 : tph->url = TALER_url_join (backend_url,
192 : "private/otp-devices",
193 : NULL);
194 4 : if (NULL == tph->url)
195 : {
196 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
197 : "Could not construct request URL.\n");
198 0 : json_decref (req_obj);
199 0 : GNUNET_free (tph);
200 0 : return NULL;
201 : }
202 : {
203 : CURL *eh;
204 :
205 4 : eh = TALER_MERCHANT_curl_easy_get_ (tph->url);
206 4 : GNUNET_assert (GNUNET_OK ==
207 : TALER_curl_easy_post (&tph->post_ctx,
208 : eh,
209 : req_obj));
210 4 : json_decref (req_obj);
211 8 : tph->job = GNUNET_CURL_job_add2 (ctx,
212 : eh,
213 4 : tph->post_ctx.headers,
214 : &handle_post_otp_devices_finished,
215 : tph);
216 4 : GNUNET_assert (NULL != tph->job);
217 : }
218 4 : return tph;
219 : }
220 :
221 :
222 : void
223 4 : TALER_MERCHANT_otp_devices_post_cancel (
224 : struct TALER_MERCHANT_OtpDevicesPostHandle *tph)
225 : {
226 4 : if (NULL != tph->job)
227 : {
228 0 : GNUNET_CURL_job_cancel (tph->job);
229 0 : tph->job = NULL;
230 : }
231 4 : TALER_curl_easy_post_finished (&tph->post_ctx);
232 4 : GNUNET_free (tph->url);
233 4 : GNUNET_free (tph);
234 4 : }
235 :
236 :
237 : /* end of merchant_api_post_otp_devices.c */
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