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 connection to exchange this request handle will use
47 : */
48 : struct TALER_EXCHANGE_Handle *exchange;
49 :
50 : /**
51 : * The url for this request.
52 : */
53 : char *url;
54 :
55 : /**
56 : * Handle for the request.
57 : */
58 : struct GNUNET_CURL_Job *job;
59 :
60 : /**
61 : * Function to call with the result.
62 : */
63 : TALER_EXCHANGE_KycWalletCallback cb;
64 :
65 : /**
66 : * Closure for @e cb.
67 : */
68 : void *cb_cls;
69 :
70 : };
71 :
72 :
73 : /**
74 : * Function called when we're done processing the
75 : * HTTP /kyc-wallet request.
76 : *
77 : * @param cls the `struct TALER_EXCHANGE_KycWalletHandle`
78 : * @param response_code HTTP response code, 0 on error
79 : * @param response parsed JSON result, NULL on error
80 : */
81 : static void
82 0 : handle_kyc_wallet_finished (void *cls,
83 : long response_code,
84 : const void *response)
85 : {
86 0 : struct TALER_EXCHANGE_KycWalletHandle *kwh = cls;
87 0 : const json_t *j = response;
88 0 : struct TALER_EXCHANGE_WalletKycResponse ks = {
89 0 : .http_status = (unsigned int) response_code
90 : };
91 :
92 0 : kwh->job = NULL;
93 0 : switch (response_code)
94 : {
95 0 : case 0:
96 0 : ks.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
97 0 : break;
98 0 : case MHD_HTTP_NO_CONTENT:
99 0 : break;
100 0 : case MHD_HTTP_BAD_REQUEST:
101 0 : ks.ec = TALER_JSON_get_error_code (j);
102 : /* This should never happen, either us or the exchange is buggy
103 : (or API version conflict); just pass JSON reply to the application */
104 0 : break;
105 0 : case MHD_HTTP_FORBIDDEN:
106 0 : ks.ec = TALER_JSON_get_error_code (j);
107 0 : break;
108 0 : case MHD_HTTP_NOT_FOUND:
109 0 : ks.ec = TALER_JSON_get_error_code (j);
110 0 : break;
111 0 : case MHD_HTTP_UNAVAILABLE_FOR_LEGAL_REASONS:
112 : {
113 : struct GNUNET_JSON_Specification spec[] = {
114 0 : GNUNET_JSON_spec_fixed_auto (
115 : "h_payto",
116 : &ks.details.unavailable_for_legal_reasons.h_payto),
117 0 : GNUNET_JSON_spec_uint64 (
118 : "requirement_row",
119 : &ks.details.unavailable_for_legal_reasons.requirement_row),
120 0 : GNUNET_JSON_spec_end ()
121 : };
122 :
123 0 : if (GNUNET_OK !=
124 0 : GNUNET_JSON_parse (j,
125 : spec,
126 : NULL, NULL))
127 : {
128 0 : GNUNET_break_op (0);
129 0 : ks.http_status = 0;
130 0 : ks.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
131 0 : break;
132 : }
133 0 : break;
134 : }
135 0 : case MHD_HTTP_INTERNAL_SERVER_ERROR:
136 0 : ks.ec = TALER_JSON_get_error_code (j);
137 : /* Server had an internal issue; we should retry, but this API
138 : leaves this to the application */
139 0 : break;
140 0 : default:
141 : /* unexpected response code */
142 0 : GNUNET_break_op (0);
143 0 : ks.ec = TALER_JSON_get_error_code (j);
144 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
145 : "Unexpected response code %u/%d for exchange /kyc-wallet\n",
146 : (unsigned int) response_code,
147 : (int) ks.ec);
148 0 : break;
149 : }
150 0 : kwh->cb (kwh->cb_cls,
151 : &ks);
152 0 : TALER_EXCHANGE_kyc_wallet_cancel (kwh);
153 0 : }
154 :
155 :
156 : struct TALER_EXCHANGE_KycWalletHandle *
157 0 : TALER_EXCHANGE_kyc_wallet (struct TALER_EXCHANGE_Handle *exchange,
158 : const struct TALER_ReservePrivateKeyP *reserve_priv,
159 : const struct TALER_Amount *balance,
160 : TALER_EXCHANGE_KycWalletCallback cb,
161 : void *cb_cls)
162 : {
163 : struct TALER_EXCHANGE_KycWalletHandle *kwh;
164 : CURL *eh;
165 : json_t *req;
166 : struct GNUNET_CURL_Context *ctx;
167 : struct TALER_ReservePublicKeyP reserve_pub;
168 : struct TALER_ReserveSignatureP reserve_sig;
169 :
170 0 : GNUNET_CRYPTO_eddsa_key_get_public (&reserve_priv->eddsa_priv,
171 : &reserve_pub.eddsa_pub);
172 0 : TALER_wallet_account_setup_sign (reserve_priv,
173 : &reserve_sig);
174 0 : req = GNUNET_JSON_PACK (
175 : TALER_JSON_pack_amount ("balance",
176 : balance),
177 : GNUNET_JSON_pack_data_auto ("reserve_pub",
178 : &reserve_pub),
179 : GNUNET_JSON_pack_data_auto ("reserve_sig",
180 : &reserve_sig));
181 0 : GNUNET_assert (NULL != req);
182 0 : kwh = GNUNET_new (struct TALER_EXCHANGE_KycWalletHandle);
183 0 : kwh->exchange = exchange;
184 0 : kwh->cb = cb;
185 0 : kwh->cb_cls = cb_cls;
186 0 : kwh->url = TEAH_path_to_url (exchange,
187 : "/kyc-wallet");
188 0 : if (NULL == kwh->url)
189 : {
190 0 : json_decref (req);
191 0 : GNUNET_free (kwh);
192 0 : return NULL;
193 : }
194 0 : ctx = TEAH_handle_to_context (exchange);
195 0 : eh = TALER_EXCHANGE_curl_easy_get_ (kwh->url);
196 0 : if ( (NULL == eh) ||
197 : (GNUNET_OK !=
198 0 : TALER_curl_easy_post (&kwh->ctx,
199 : eh,
200 : req)) )
201 : {
202 0 : GNUNET_break (0);
203 0 : if (NULL != eh)
204 0 : curl_easy_cleanup (eh);
205 0 : json_decref (req);
206 0 : GNUNET_free (kwh->url);
207 0 : GNUNET_free (kwh);
208 0 : return NULL;
209 : }
210 0 : json_decref (req);
211 0 : kwh->job = GNUNET_CURL_job_add2 (ctx,
212 : eh,
213 0 : kwh->ctx.headers,
214 : &handle_kyc_wallet_finished,
215 : kwh);
216 0 : return kwh;
217 : }
218 :
219 :
220 : void
221 0 : TALER_EXCHANGE_kyc_wallet_cancel (struct TALER_EXCHANGE_KycWalletHandle *kwh)
222 : {
223 0 : if (NULL != kwh->job)
224 : {
225 0 : GNUNET_CURL_job_cancel (kwh->job);
226 0 : kwh->job = NULL;
227 : }
228 0 : GNUNET_free (kwh->url);
229 0 : TALER_curl_easy_post_finished (&kwh->ctx);
230 0 : GNUNET_free (kwh);
231 0 : }
232 :
233 :
234 : /* end of exchange_api_kyc_wallet.c */
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