Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2021 Taler Systems SA
4 :
5 : TALER is free software; you can redistribute it and/or modify it under the
6 : terms of the GNU General Public License as published by the Free Software
7 : Foundation; either version 3, 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 General Public License for more details.
12 :
13 : You should have received a copy of the GNU General Public License along with
14 : TALER; see the file COPYING. If not, see
15 : <http://www.gnu.org/licenses/>
16 : */
17 : /**
18 : * @file lib/exchange_api_kyc_wallet.c
19 : * @brief Implementation of the /kyc-wallet request
20 : * @author Christian Grothoff
21 : */
22 : #include "platform.h"
23 : #include <microhttpd.h> /* just for HTTP wallet codes */
24 : #include <gnunet/gnunet_util_lib.h>
25 : #include <gnunet/gnunet_curl_lib.h>
26 : #include "taler_exchange_service.h"
27 : #include "taler_json_lib.h"
28 : #include "exchange_api_handle.h"
29 : #include "taler_signatures.h"
30 : #include "exchange_api_curl_defaults.h"
31 :
32 :
33 : /**
34 : * @brief A ``/kyc-wallet`` handle
35 : */
36 : struct TALER_EXCHANGE_KycWalletHandle
37 : {
38 :
39 : /**
40 : * Context for #TEH_curl_easy_post(). Keeps the data that must
41 : * persist for Curl to make the upload.
42 : */
43 : struct TALER_CURL_PostContext ctx;
44 :
45 : /**
46 : * The url for this request.
47 : */
48 : char *url;
49 :
50 : /**
51 : * Handle for the request.
52 : */
53 : struct GNUNET_CURL_Job *job;
54 :
55 : /**
56 : * Function to call with the result.
57 : */
58 : TALER_EXCHANGE_KycWalletCallback cb;
59 :
60 : /**
61 : * Closure for @e cb.
62 : */
63 : void *cb_cls;
64 :
65 : };
66 :
67 :
68 : /**
69 : * Function called when we're done processing the
70 : * HTTP /kyc-wallet request.
71 : *
72 : * @param cls the `struct TALER_EXCHANGE_KycWalletHandle`
73 : * @param response_code HTTP response code, 0 on error
74 : * @param response parsed JSON result, NULL on error
75 : */
76 : static void
77 7 : handle_kyc_wallet_finished (void *cls,
78 : long response_code,
79 : const void *response)
80 : {
81 7 : struct TALER_EXCHANGE_KycWalletHandle *kwh = cls;
82 7 : const json_t *j = response;
83 7 : struct TALER_EXCHANGE_WalletKycResponse ks = {
84 : .hr.reply = j,
85 7 : .hr.http_status = (unsigned int) response_code
86 : };
87 :
88 7 : kwh->job = NULL;
89 7 : switch (response_code)
90 : {
91 0 : case 0:
92 0 : ks.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
93 0 : break;
94 2 : case MHD_HTTP_OK:
95 : {
96 : struct GNUNET_JSON_Specification spec[] = {
97 2 : GNUNET_JSON_spec_mark_optional (
98 : TALER_JSON_spec_amount_any (
99 : "next_threshold",
100 : &ks.details.ok.next_threshold),
101 : NULL),
102 2 : GNUNET_JSON_spec_timestamp (
103 : "expiration_time",
104 : &ks.details.ok.expiration_time),
105 2 : GNUNET_JSON_spec_end ()
106 : };
107 :
108 2 : if (GNUNET_OK !=
109 2 : GNUNET_JSON_parse (j,
110 : spec,
111 : NULL, NULL))
112 : {
113 0 : GNUNET_break_op (0);
114 0 : ks.hr.http_status = 0;
115 0 : ks.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
116 0 : break;
117 : }
118 2 : break;
119 : }
120 0 : case MHD_HTTP_NO_CONTENT:
121 0 : break;
122 0 : case MHD_HTTP_BAD_REQUEST:
123 0 : ks.hr.ec = TALER_JSON_get_error_code (j);
124 : /* This should never happen, either us or the exchange is buggy
125 : (or API version conflict); just pass JSON reply to the application */
126 0 : break;
127 0 : case MHD_HTTP_FORBIDDEN:
128 0 : ks.hr.ec = TALER_JSON_get_error_code (j);
129 0 : break;
130 0 : case MHD_HTTP_NOT_FOUND:
131 0 : ks.hr.ec = TALER_JSON_get_error_code (j);
132 0 : break;
133 5 : case MHD_HTTP_UNAVAILABLE_FOR_LEGAL_REASONS:
134 : {
135 : struct GNUNET_JSON_Specification spec[] = {
136 5 : GNUNET_JSON_spec_fixed_auto (
137 : "h_payto",
138 : &ks.details.unavailable_for_legal_reasons.h_payto),
139 5 : GNUNET_JSON_spec_uint64 (
140 : "requirement_row",
141 : &ks.details.unavailable_for_legal_reasons.requirement_row),
142 5 : GNUNET_JSON_spec_end ()
143 : };
144 :
145 5 : if (GNUNET_OK !=
146 5 : GNUNET_JSON_parse (j,
147 : spec,
148 : NULL, NULL))
149 : {
150 0 : GNUNET_break_op (0);
151 0 : ks.hr.http_status = 0;
152 0 : ks.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
153 0 : break;
154 : }
155 5 : break;
156 : }
157 0 : case MHD_HTTP_INTERNAL_SERVER_ERROR:
158 0 : ks.hr.ec = TALER_JSON_get_error_code (j);
159 : /* Server had an internal issue; we should retry, but this API
160 : leaves this to the application */
161 0 : break;
162 0 : default:
163 : /* unexpected response code */
164 0 : GNUNET_break_op (0);
165 0 : ks.hr.ec = TALER_JSON_get_error_code (j);
166 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
167 : "Unexpected response code %u/%d for exchange /kyc-wallet\n",
168 : (unsigned int) response_code,
169 : (int) ks.hr.ec);
170 0 : break;
171 : }
172 7 : kwh->cb (kwh->cb_cls,
173 : &ks);
174 7 : TALER_EXCHANGE_kyc_wallet_cancel (kwh);
175 7 : }
176 :
177 :
178 : struct TALER_EXCHANGE_KycWalletHandle *
179 7 : TALER_EXCHANGE_kyc_wallet (
180 : struct GNUNET_CURL_Context *ctx,
181 : const char *url,
182 : const struct TALER_ReservePrivateKeyP *reserve_priv,
183 : const struct TALER_Amount *balance,
184 : TALER_EXCHANGE_KycWalletCallback cb,
185 : void *cb_cls)
186 : {
187 : struct TALER_EXCHANGE_KycWalletHandle *kwh;
188 : CURL *eh;
189 : json_t *req;
190 : struct TALER_ReservePublicKeyP reserve_pub;
191 : struct TALER_ReserveSignatureP reserve_sig;
192 :
193 7 : GNUNET_CRYPTO_eddsa_key_get_public (&reserve_priv->eddsa_priv,
194 : &reserve_pub.eddsa_pub);
195 7 : TALER_wallet_account_setup_sign (reserve_priv,
196 : balance,
197 : &reserve_sig);
198 7 : req = GNUNET_JSON_PACK (
199 : TALER_JSON_pack_amount ("balance",
200 : balance),
201 : GNUNET_JSON_pack_data_auto ("reserve_pub",
202 : &reserve_pub),
203 : GNUNET_JSON_pack_data_auto ("reserve_sig",
204 : &reserve_sig));
205 7 : GNUNET_assert (NULL != req);
206 7 : kwh = GNUNET_new (struct TALER_EXCHANGE_KycWalletHandle);
207 7 : kwh->cb = cb;
208 7 : kwh->cb_cls = cb_cls;
209 7 : kwh->url = TALER_url_join (url,
210 : "kyc-wallet",
211 : NULL);
212 7 : if (NULL == kwh->url)
213 : {
214 0 : json_decref (req);
215 0 : GNUNET_free (kwh);
216 0 : return NULL;
217 : }
218 7 : eh = TALER_EXCHANGE_curl_easy_get_ (kwh->url);
219 14 : if ( (NULL == eh) ||
220 : (GNUNET_OK !=
221 7 : TALER_curl_easy_post (&kwh->ctx,
222 : eh,
223 : req)) )
224 : {
225 0 : GNUNET_break (0);
226 0 : if (NULL != eh)
227 0 : curl_easy_cleanup (eh);
228 0 : json_decref (req);
229 0 : GNUNET_free (kwh->url);
230 0 : GNUNET_free (kwh);
231 0 : return NULL;
232 : }
233 7 : json_decref (req);
234 14 : kwh->job = GNUNET_CURL_job_add2 (ctx,
235 : eh,
236 7 : kwh->ctx.headers,
237 : &handle_kyc_wallet_finished,
238 : kwh);
239 7 : return kwh;
240 : }
241 :
242 :
243 : void
244 7 : TALER_EXCHANGE_kyc_wallet_cancel (struct TALER_EXCHANGE_KycWalletHandle *kwh)
245 : {
246 7 : if (NULL != kwh->job)
247 : {
248 0 : GNUNET_CURL_job_cancel (kwh->job);
249 0 : kwh->job = NULL;
250 : }
251 7 : GNUNET_free (kwh->url);
252 7 : TALER_curl_easy_post_finished (&kwh->ctx);
253 7 : GNUNET_free (kwh);
254 7 : }
255 :
256 :
257 : /* end of exchange_api_kyc_wallet.c */
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