Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2024-2026 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_post-kyc-start-ID.c
19 : * @brief functions to start a KYC process
20 : * @author Christian Grothoff
21 : */
22 : #include "taler/platform.h"
23 : #include "taler/taler_json_lib.h"
24 : #include <microhttpd.h>
25 : #include <gnunet/gnunet_curl_lib.h>
26 : #include "taler/taler_exchange_service.h"
27 : #include "taler/taler-exchange/post-kyc-start-ID.h"
28 : #include "exchange_api_curl_defaults.h"
29 : #include "taler/taler_signatures.h"
30 : #include "taler/taler_curl_lib.h"
31 :
32 :
33 : struct TALER_EXCHANGE_PostKycStartHandle
34 : {
35 :
36 : /**
37 : * The base URL for this request.
38 : */
39 : char *base_url;
40 :
41 : /**
42 : * The full URL for this request.
43 : */
44 : char *url;
45 :
46 : /**
47 : * Minor context that holds body and headers.
48 : */
49 : struct TALER_CURL_PostContext post_ctx;
50 :
51 : /**
52 : * Handle for the request.
53 : */
54 : struct GNUNET_CURL_Job *job;
55 :
56 : /**
57 : * Function to call with the result.
58 : */
59 : TALER_EXCHANGE_PostKycStartCallback cb;
60 :
61 : /**
62 : * Closure for @e cb.
63 : */
64 : TALER_EXCHANGE_POST_KYC_START_RESULT_CLOSURE *cb_cls;
65 :
66 : /**
67 : * Reference to the execution context.
68 : */
69 : struct GNUNET_CURL_Context *ctx;
70 :
71 : /**
72 : * Identifier for the KYC process to start.
73 : */
74 : char *id;
75 :
76 : };
77 :
78 :
79 : /**
80 : * Function called when we're done processing the
81 : * HTTP POST /kyc-start/$ID request.
82 : *
83 : * @param cls the `struct TALER_EXCHANGE_PostKycStartHandle *`
84 : * @param response_code HTTP response code, 0 on error
85 : * @param response response body, NULL if not in JSON
86 : */
87 : static void
88 10 : handle_kyc_start_finished (void *cls,
89 : long response_code,
90 : const void *response)
91 : {
92 10 : struct TALER_EXCHANGE_PostKycStartHandle *pksh = cls;
93 10 : const json_t *json = response;
94 10 : struct TALER_EXCHANGE_PostKycStartResponse adr = {
95 10 : .hr.http_status = (unsigned int) response_code,
96 : .hr.reply = json
97 : };
98 :
99 10 : pksh->job = NULL;
100 10 : switch (response_code)
101 : {
102 0 : case 0:
103 : /* no reply */
104 0 : adr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
105 0 : adr.hr.hint = "server offline?";
106 0 : break;
107 10 : case MHD_HTTP_OK:
108 : {
109 : struct GNUNET_JSON_Specification spec[] = {
110 10 : GNUNET_JSON_spec_string (
111 : "redirect_url",
112 : &adr.details.ok.redirect_url),
113 10 : GNUNET_JSON_spec_end ()
114 : };
115 :
116 10 : if (GNUNET_OK !=
117 10 : GNUNET_JSON_parse (json,
118 : spec,
119 : NULL, NULL))
120 : {
121 0 : GNUNET_break_op (0);
122 0 : adr.hr.http_status = 0;
123 0 : adr.hr.ec = TALER_EC_GENERIC_REPLY_MALFORMED;
124 0 : break;
125 : }
126 : }
127 10 : break;
128 0 : case MHD_HTTP_NOT_FOUND:
129 0 : break;
130 0 : default:
131 : /* unexpected response code */
132 0 : GNUNET_break_op (0);
133 0 : adr.hr.ec = TALER_JSON_get_error_code (json);
134 0 : adr.hr.hint = TALER_JSON_get_error_hint (json);
135 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
136 : "Unexpected response code %u/%d for exchange POST kyc-start\n",
137 : (unsigned int) response_code,
138 : (int) adr.hr.ec);
139 0 : break;
140 : }
141 10 : if (NULL != pksh->cb)
142 : {
143 10 : pksh->cb (pksh->cb_cls,
144 : &adr);
145 10 : pksh->cb = NULL;
146 : }
147 10 : TALER_EXCHANGE_post_kyc_start_cancel (pksh);
148 10 : }
149 :
150 :
151 : struct TALER_EXCHANGE_PostKycStartHandle *
152 10 : TALER_EXCHANGE_post_kyc_start_create (
153 : struct GNUNET_CURL_Context *ctx,
154 : const char *url,
155 : const char *id)
156 : {
157 : struct TALER_EXCHANGE_PostKycStartHandle *pksh;
158 :
159 10 : pksh = GNUNET_new (struct TALER_EXCHANGE_PostKycStartHandle);
160 10 : pksh->ctx = ctx;
161 10 : pksh->base_url = GNUNET_strdup (url);
162 10 : pksh->id = GNUNET_strdup (id);
163 10 : return pksh;
164 : }
165 :
166 :
167 : enum TALER_ErrorCode
168 10 : TALER_EXCHANGE_post_kyc_start_start (
169 : struct TALER_EXCHANGE_PostKycStartHandle *pksh,
170 : TALER_EXCHANGE_PostKycStartCallback cb,
171 : TALER_EXCHANGE_POST_KYC_START_RESULT_CLOSURE *cb_cls)
172 : {
173 : CURL *eh;
174 : json_t *body;
175 : char *path;
176 :
177 10 : pksh->cb = cb;
178 10 : pksh->cb_cls = cb_cls;
179 10 : GNUNET_asprintf (&path,
180 : "kyc-start/%s",
181 : pksh->id);
182 10 : pksh->url = TALER_url_join (pksh->base_url,
183 : path,
184 : NULL);
185 10 : GNUNET_free (path);
186 10 : if (NULL == pksh->url)
187 : {
188 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
189 : "Could not construct request URL.\n");
190 0 : return TALER_EC_GENERIC_CONFIGURATION_INVALID;
191 : }
192 10 : body = json_object (); /* as per spec: empty! */
193 10 : GNUNET_assert (NULL != body);
194 10 : eh = TALER_EXCHANGE_curl_easy_get_ (pksh->url);
195 20 : if ( (NULL == eh) ||
196 : (GNUNET_OK !=
197 10 : TALER_curl_easy_post (&pksh->post_ctx,
198 : eh,
199 : body)) )
200 : {
201 0 : GNUNET_break (0);
202 0 : if (NULL != eh)
203 0 : curl_easy_cleanup (eh);
204 0 : json_decref (body);
205 0 : GNUNET_free (pksh->url);
206 0 : pksh->url = NULL;
207 0 : return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
208 : }
209 10 : json_decref (body);
210 10 : GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
211 : "Requesting URL '%s'\n",
212 : pksh->url);
213 20 : pksh->job = GNUNET_CURL_job_add2 (pksh->ctx,
214 : eh,
215 10 : pksh->post_ctx.headers,
216 : &handle_kyc_start_finished,
217 : pksh);
218 10 : if (NULL == pksh->job)
219 : {
220 0 : TALER_curl_easy_post_finished (&pksh->post_ctx);
221 0 : GNUNET_free (pksh->url);
222 0 : pksh->url = NULL;
223 0 : return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
224 : }
225 10 : return TALER_EC_NONE;
226 : }
227 :
228 :
229 : void
230 10 : TALER_EXCHANGE_post_kyc_start_cancel (
231 : struct TALER_EXCHANGE_PostKycStartHandle *pksh)
232 : {
233 10 : if (NULL != pksh->job)
234 : {
235 0 : GNUNET_CURL_job_cancel (pksh->job);
236 0 : pksh->job = NULL;
237 : }
238 10 : TALER_curl_easy_post_finished (&pksh->post_ctx);
239 10 : GNUNET_free (pksh->url);
240 10 : GNUNET_free (pksh->base_url);
241 10 : GNUNET_free (pksh->id);
242 10 : GNUNET_free (pksh);
243 10 : }
244 :
245 :
246 : /* end of exchange_api_post-kyc-start-ID.c */
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