1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
|
/*
This file is part of TALER
Copyright (C) 2022 Taler Systems SA
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU Lesser General Public License as published by the Free Software
Foundation; either version 2.1, 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with
TALER; see the file COPYING.LGPL. If not, see
<http://www.gnu.org/licenses/>
*/
/**
* @file merchant_api_get_otp_devices.c
* @brief Implementation of the GET /otp-devices request of the merchant's HTTP API
* @author Christian Grothoff
*/
#include "platform.h"
#include <curl/curl.h>
#include <jansson.h>
#include <microhttpd.h> /* just for HTTP status codes */
#include <gnunet/gnunet_util_lib.h>
#include <gnunet/gnunet_curl_lib.h>
#include "taler_merchant_service.h"
#include "merchant_api_curl_defaults.h"
#include <taler/taler_json_lib.h>
#include <taler/taler_signatures.h>
/**
* Maximum number of OTP devices we return.
*/
#define MAX_OTP 1024
/**
* Handle for a GET /otp-devices operation.
*/
struct TALER_MERCHANT_OtpDevicesGetHandle
{
/**
* The url for this request.
*/
char *url;
/**
* Handle for the request.
*/
struct GNUNET_CURL_Job *job;
/**
* Function to call with the result.
*/
TALER_MERCHANT_OtpDevicesGetCallback cb;
/**
* Closure for @a cb.
*/
void *cb_cls;
/**
* Reference to the execution context.
*/
struct GNUNET_CURL_Context *ctx;
};
/**
* Parse OTP device information from @a ia.
*
* @param ia JSON array (or NULL!) with otp_device data
* @param[in] tgr partially filled response
* @param tgh operation handle
* @return #GNUNET_OK on success
*/
static enum GNUNET_GenericReturnValue
parse_otp_devices (const json_t *ia,
struct TALER_MERCHANT_OtpDevicesGetResponse *tgr,
struct TALER_MERCHANT_OtpDevicesGetHandle *tgh)
{
unsigned int otp_len = (unsigned int) json_array_size (ia);
if ( (json_array_size (ia) != (size_t) otp_len) ||
(otp_len > MAX_OTP) )
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
{
struct TALER_MERCHANT_OtpDeviceEntry otp[GNUNET_NZL (otp_len)];
size_t index;
json_t *value;
json_array_foreach (ia, index, value) {
struct TALER_MERCHANT_OtpDeviceEntry *ie = &otp[index];
struct GNUNET_JSON_Specification spec[] = {
GNUNET_JSON_spec_string ("otp_device_id",
&ie->otp_device_id),
GNUNET_JSON_spec_string ("device_description",
&ie->device_description),
GNUNET_JSON_spec_end ()
};
if (GNUNET_OK !=
GNUNET_JSON_parse (value,
spec,
NULL, NULL))
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
}
tgr->details.ok.otp_devices_length = otp_len;
tgr->details.ok.otp_devices = otp;
tgh->cb (tgh->cb_cls,
tgr);
tgh->cb = NULL; /* just to be sure */
}
return GNUNET_OK;
}
/**
* Function called when we're done processing the
* HTTP /otp-devices request.
*
* @param cls the `struct TALER_MERCHANT_OtpDevicesGetHandle`
* @param response_code HTTP response code, 0 on error
* @param response response body, NULL if not in JSON
*/
static void
handle_get_otp_devices_finished (void *cls,
long response_code,
const void *response)
{
struct TALER_MERCHANT_OtpDevicesGetHandle *tgh = cls;
const json_t *json = response;
struct TALER_MERCHANT_OtpDevicesGetResponse tgr = {
.hr.http_status = (unsigned int) response_code,
.hr.reply = json
};
tgh->job = NULL;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Got /otp-devices response with status code %u\n",
(unsigned int) response_code);
switch (response_code)
{
case MHD_HTTP_OK:
{
const json_t *otp_devices;
struct GNUNET_JSON_Specification spec[] = {
GNUNET_JSON_spec_array_const ("otp_devices",
&otp_devices),
GNUNET_JSON_spec_end ()
};
if (GNUNET_OK !=
GNUNET_JSON_parse (json,
spec,
NULL, NULL))
{
tgr.hr.http_status = 0;
tgr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
break;
}
if (GNUNET_OK ==
parse_otp_devices (otp_devices,
&tgr,
tgh))
{
TALER_MERCHANT_otp_devices_get_cancel (tgh);
return;
}
tgr.hr.http_status = 0;
tgr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
break;
}
case MHD_HTTP_UNAUTHORIZED:
tgr.hr.ec = TALER_JSON_get_error_code (json);
tgr.hr.hint = TALER_JSON_get_error_hint (json);
/* Nothing really to verify, merchant says we need to authenticate. */
break;
default:
/* unexpected response code */
tgr.hr.ec = TALER_JSON_get_error_code (json);
tgr.hr.hint = TALER_JSON_get_error_hint (json);
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Unexpected response code %u/%d\n",
(unsigned int) response_code,
(int) tgr.hr.ec);
break;
}
tgh->cb (tgh->cb_cls,
&tgr);
TALER_MERCHANT_otp_devices_get_cancel (tgh);
}
struct TALER_MERCHANT_OtpDevicesGetHandle *
TALER_MERCHANT_otp_devices_get (
struct GNUNET_CURL_Context *ctx,
const char *backend_url,
TALER_MERCHANT_OtpDevicesGetCallback cb,
void *cb_cls)
{
struct TALER_MERCHANT_OtpDevicesGetHandle *tgh;
CURL *eh;
tgh = GNUNET_new (struct TALER_MERCHANT_OtpDevicesGetHandle);
tgh->ctx = ctx;
tgh->cb = cb;
tgh->cb_cls = cb_cls;
tgh->url = TALER_url_join (backend_url,
"private/otp-devices",
NULL);
if (NULL == tgh->url)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Could not construct request URL.\n");
GNUNET_free (tgh);
return NULL;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Requesting URL '%s'\n",
tgh->url);
eh = TALER_MERCHANT_curl_easy_get_ (tgh->url);
tgh->job = GNUNET_CURL_job_add (ctx,
eh,
&handle_get_otp_devices_finished,
tgh);
return tgh;
}
void
TALER_MERCHANT_otp_devices_get_cancel (
struct TALER_MERCHANT_OtpDevicesGetHandle *tgh)
{
if (NULL != tgh->job)
GNUNET_CURL_job_cancel (tgh->job);
GNUNET_free (tgh->url);
GNUNET_free (tgh);
}
|
