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 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/$ID request.
70 : *
71 : * @param cls the `struct TALER_MERCHANT_OtpDeviceGetHandle`
72 : * @param response_code HTTP response code, 0 on error
73 : * @param response response body, NULL if not in JSON
74 : */
75 : static void
76 0 : handle_get_otp_device_finished (void *cls,
77 : long response_code,
78 : const void *response)
79 : {
80 0 : struct TALER_MERCHANT_OtpDeviceGetHandle *tgh = cls;
81 0 : const json_t *json = response;
82 0 : struct TALER_MERCHANT_OtpDeviceGetResponse tgr = {
83 0 : .hr.http_status = (unsigned int) response_code,
84 : .hr.reply = json
85 : };
86 :
87 0 : tgh->job = NULL;
88 0 : GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
89 : "Got /otp-devices/$ID response with status code %u\n",
90 : (unsigned int) response_code);
91 0 : switch (response_code)
92 : {
93 0 : case MHD_HTTP_OK:
94 : {
95 : uint32_t alg32;
96 : struct GNUNET_JSON_Specification spec[] = {
97 0 : GNUNET_JSON_spec_string ("otp_device_description",
98 : &tgr.details.ok.otp_device_description),
99 0 : GNUNET_JSON_spec_uint32 ("otp_algorithm",
100 : &alg32),
101 0 : GNUNET_JSON_spec_mark_optional (
102 : GNUNET_JSON_spec_uint64 ("otp_ctr",
103 : &tgr.details.ok.otp_ctr),
104 : NULL),
105 0 : GNUNET_JSON_spec_mark_optional (
106 : GNUNET_JSON_spec_uint64 ("otp_timestamp",
107 : &tgr.details.ok.otp_timestamp_s),
108 : NULL),
109 0 : GNUNET_JSON_spec_mark_optional (
110 : GNUNET_JSON_spec_string ("otp_code",
111 : &tgr.details.ok.otp_code),
112 : NULL),
113 0 : GNUNET_JSON_spec_end ()
114 : };
115 :
116 0 : if (GNUNET_OK ==
117 0 : GNUNET_JSON_parse (json,
118 : spec,
119 : NULL, NULL))
120 : {
121 0 : tgr.details.ok.otp_alg =
122 : (enum TALER_MerchantConfirmationAlgorithm) alg32;
123 0 : tgh->cb (tgh->cb_cls,
124 : &tgr);
125 0 : TALER_MERCHANT_otp_device_get_cancel (tgh);
126 0 : return;
127 : }
128 0 : tgr.hr.http_status = 0;
129 0 : tgr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
130 0 : break;
131 : }
132 0 : case MHD_HTTP_UNAUTHORIZED:
133 0 : tgr.hr.ec = TALER_JSON_get_error_code (json);
134 0 : tgr.hr.hint = TALER_JSON_get_error_hint (json);
135 : /* Nothing really to verify, merchant says we need to authenticate. */
136 0 : break;
137 0 : case MHD_HTTP_NOT_FOUND:
138 0 : tgr.hr.ec = TALER_JSON_get_error_code (json);
139 0 : tgr.hr.hint = TALER_JSON_get_error_hint (json);
140 0 : break;
141 0 : default:
142 : /* unexpected response code */
143 0 : tgr.hr.ec = TALER_JSON_get_error_code (json);
144 0 : tgr.hr.hint = TALER_JSON_get_error_hint (json);
145 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
146 : "Unexpected response code %u/%d\n",
147 : (unsigned int) response_code,
148 : (int) tgr.hr.ec);
149 0 : break;
150 : }
151 0 : tgh->cb (tgh->cb_cls,
152 : &tgr);
153 0 : TALER_MERCHANT_otp_device_get_cancel (tgh);
154 : }
155 :
156 :
157 : struct TALER_MERCHANT_OtpDeviceGetHandle *
158 0 : 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 0 : tgh = GNUNET_new (struct TALER_MERCHANT_OtpDeviceGetHandle);
169 0 : tgh->ctx = ctx;
170 0 : tgh->cb = cb;
171 0 : tgh->cb_cls = cb_cls;
172 : {
173 : char *path;
174 :
175 0 : GNUNET_asprintf (&path,
176 : "private/otp-devices/%s",
177 : otp_device_id);
178 0 : tgh->url = TALER_url_join (backend_url,
179 : path,
180 : NULL);
181 0 : GNUNET_free (path);
182 : }
183 0 : if (NULL == tgh->url)
184 : {
185 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
186 : "Could not construct request URL.\n");
187 0 : GNUNET_free (tgh);
188 0 : return NULL;
189 : }
190 0 : GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
191 : "Requesting URL '%s'\n",
192 : tgh->url);
193 0 : eh = TALER_MERCHANT_curl_easy_get_ (tgh->url);
194 0 : tgh->job = GNUNET_CURL_job_add (ctx,
195 : eh,
196 : &handle_get_otp_device_finished,
197 : tgh);
198 0 : return tgh;
199 : }
200 :
201 :
202 : void
203 0 : TALER_MERCHANT_otp_device_get_cancel (
204 : struct TALER_MERCHANT_OtpDeviceGetHandle *tgh)
205 : {
206 0 : if (NULL != tgh->job)
207 0 : GNUNET_CURL_job_cancel (tgh->job);
208 0 : GNUNET_free (tgh->url);
209 0 : GNUNET_free (tgh);
210 0 : }
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