Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2023, 2024, 2025, 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_get-aml-OFFICER_PUB-attributes-H_NORMALIZED_PAYTO.c
19 : * @brief Implementation of the /aml/$OFFICER_PUB/attributes request
20 : * @author Christian Grothoff
21 : */
22 : #include "taler/platform.h"
23 : #include <microhttpd.h> /* just for HTTP status codes */
24 : #include <gnunet/gnunet_util_lib.h>
25 : #include <gnunet/gnunet_curl_lib.h>
26 : #include "taler/taler_exchange_service.h"
27 : #include "taler/taler_json_lib.h"
28 : #include "exchange_api_handle.h"
29 : #include "taler/taler_signatures.h"
30 : #include "exchange_api_curl_defaults.h"
31 : #include \
32 : "taler/taler-exchange/get-aml-OFFICER_PUB-attributes-H_NORMALIZED_PAYTO.h"
33 :
34 :
35 : /**
36 : * @brief A GET /aml/$OFFICER_PUB/attributes/$H_NORMALIZED_PAYTO Handle
37 : */
38 : struct TALER_EXCHANGE_GetAmlAttributesHandle
39 : {
40 :
41 : /**
42 : * Base URL of the exchange.
43 : */
44 : char *base_url;
45 :
46 : /**
47 : * The url for this request.
48 : */
49 : char *url;
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_GetAmlAttributesCallback cb;
60 :
61 : /**
62 : * Closure for @e cb.
63 : */
64 : TALER_EXCHANGE_GET_AML_ATTRIBUTES_RESULT_CLOSURE *cb_cls;
65 :
66 : /**
67 : * CURL context to use.
68 : */
69 : struct GNUNET_CURL_Context *ctx;
70 :
71 : /**
72 : * Public key of the AML officer (computed from officer_priv in _create).
73 : */
74 : struct TALER_AmlOfficerPublicKeyP officer_pub;
75 :
76 : /**
77 : * Private key of the AML officer (stored for signing in _start).
78 : */
79 : struct TALER_AmlOfficerPrivateKeyP officer_priv;
80 :
81 : /**
82 : * Hash of the normalized payto URI for the account.
83 : */
84 : struct TALER_NormalizedPaytoHashP h_payto;
85 :
86 : /**
87 : * Options set for this request.
88 : */
89 : struct
90 : {
91 : /**
92 : * Limit on the number of results (negative = before offset, positive = after).
93 : * Default: -20.
94 : */
95 : int64_t limit;
96 :
97 : /**
98 : * Row offset threshold. Default: UINT64_MAX.
99 : */
100 : uint64_t offset;
101 : } options;
102 :
103 : };
104 :
105 :
106 : /**
107 : * Parse AML attribute collection events from a JSON array.
108 : *
109 : * @param jdetails JSON array with AML attribute collection events
110 : * @param[out] detail_ar where to write the results
111 : * @return #GNUNET_OK on success
112 : */
113 : static enum GNUNET_GenericReturnValue
114 0 : parse_attributes_new (
115 : const json_t *jdetails,
116 : struct TALER_EXCHANGE_GetAmlAttributesCollectionEvent *detail_ar)
117 : {
118 : json_t *obj;
119 : size_t idx;
120 :
121 0 : json_array_foreach (jdetails, idx, obj)
122 : {
123 0 : struct TALER_EXCHANGE_GetAmlAttributesCollectionEvent *detail
124 0 : = &detail_ar[idx];
125 0 : bool by_aml_officer = false;
126 : struct GNUNET_JSON_Specification spec[] = {
127 0 : GNUNET_JSON_spec_uint64 ("rowid",
128 : &detail->rowid),
129 0 : GNUNET_JSON_spec_mark_optional (
130 : GNUNET_JSON_spec_bool ("by_aml_officer",
131 : &by_aml_officer),
132 : NULL),
133 0 : GNUNET_JSON_spec_mark_optional (
134 : GNUNET_JSON_spec_object_const ("attributes",
135 : &detail->attributes),
136 : NULL),
137 0 : GNUNET_JSON_spec_timestamp ("collection_time",
138 : &detail->collection_time),
139 0 : GNUNET_JSON_spec_end ()
140 : };
141 :
142 0 : detail->by_aml_officer = false;
143 0 : detail->attributes = NULL;
144 0 : if (GNUNET_OK !=
145 0 : GNUNET_JSON_parse (obj,
146 : spec,
147 : NULL,
148 : NULL))
149 : {
150 0 : GNUNET_break_op (0);
151 0 : return GNUNET_SYSERR;
152 : }
153 0 : detail->by_aml_officer = by_aml_officer;
154 : }
155 0 : return GNUNET_OK;
156 : }
157 :
158 :
159 : /**
160 : * Parse the provided data from the "200 OK" response.
161 : *
162 : * @param[in,out] aagh handle (callback may be zero'ed out)
163 : * @param json json reply with the data
164 : * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
165 : */
166 : static enum GNUNET_GenericReturnValue
167 0 : parse_get_aml_attributes_ok_new (
168 : struct TALER_EXCHANGE_GetAmlAttributesHandle *aagh,
169 : const json_t *json)
170 : {
171 0 : struct TALER_EXCHANGE_GetAmlAttributesResponse lr = {
172 : .hr.reply = json,
173 : .hr.http_status = MHD_HTTP_OK
174 : };
175 : const json_t *jdetails;
176 : struct GNUNET_JSON_Specification spec[] = {
177 0 : GNUNET_JSON_spec_array_const ("details",
178 : &jdetails),
179 0 : GNUNET_JSON_spec_end ()
180 : };
181 :
182 0 : if (GNUNET_OK !=
183 0 : GNUNET_JSON_parse (json,
184 : spec,
185 : NULL,
186 : NULL))
187 : {
188 0 : GNUNET_break_op (0);
189 0 : return GNUNET_SYSERR;
190 : }
191 0 : lr.details.ok.details_length = json_array_size (jdetails);
192 0 : {
193 0 : struct TALER_EXCHANGE_GetAmlAttributesCollectionEvent details[
194 0 : GNUNET_NZL (lr.details.ok.details_length)];
195 :
196 0 : memset (details,
197 : 0,
198 : sizeof (details));
199 0 : lr.details.ok.details = details;
200 0 : if (GNUNET_OK !=
201 0 : parse_attributes_new (jdetails,
202 : details))
203 : {
204 0 : GNUNET_break_op (0);
205 0 : return GNUNET_SYSERR;
206 : }
207 0 : aagh->cb (aagh->cb_cls,
208 : &lr);
209 0 : aagh->cb = NULL;
210 : }
211 0 : return GNUNET_OK;
212 : }
213 :
214 :
215 : /**
216 : * Function called when we're done processing the
217 : * HTTP GET /aml/$OFFICER_PUB/attributes/$H_NORMALIZED_PAYTO request (new API).
218 : *
219 : * @param cls the `struct TALER_EXCHANGE_GetAmlAttributesHandle`
220 : * @param response_code HTTP response code, 0 on error
221 : * @param response parsed JSON result, NULL on error
222 : */
223 : static void
224 0 : handle_get_aml_attributes_finished (void *cls,
225 : long response_code,
226 : const void *response)
227 : {
228 0 : struct TALER_EXCHANGE_GetAmlAttributesHandle *aagh = cls;
229 0 : const json_t *j = response;
230 0 : struct TALER_EXCHANGE_GetAmlAttributesResponse lr = {
231 : .hr.reply = j,
232 0 : .hr.http_status = (unsigned int) response_code
233 : };
234 :
235 0 : aagh->job = NULL;
236 0 : switch (response_code)
237 : {
238 0 : case 0:
239 0 : lr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
240 0 : break;
241 0 : case MHD_HTTP_OK:
242 0 : if (GNUNET_OK !=
243 0 : parse_get_aml_attributes_ok_new (aagh,
244 : j))
245 : {
246 0 : GNUNET_break_op (0);
247 0 : lr.hr.http_status = 0;
248 0 : lr.hr.ec = TALER_EC_GENERIC_REPLY_MALFORMED;
249 0 : break;
250 : }
251 0 : GNUNET_assert (NULL == aagh->cb);
252 0 : TALER_EXCHANGE_get_aml_attributes_cancel (aagh);
253 0 : return;
254 0 : case MHD_HTTP_NO_CONTENT:
255 0 : break;
256 0 : case MHD_HTTP_NOT_IMPLEMENTED:
257 0 : lr.hr.ec = TALER_JSON_get_error_code (j);
258 0 : lr.hr.hint = TALER_JSON_get_error_hint (j);
259 0 : break;
260 0 : case MHD_HTTP_BAD_REQUEST:
261 0 : lr.hr.ec = TALER_JSON_get_error_code (j);
262 0 : lr.hr.hint = TALER_JSON_get_error_hint (j);
263 : /* This should never happen, either us or the exchange is buggy
264 : (or API version conflict); just pass JSON reply to the application */
265 0 : break;
266 0 : case MHD_HTTP_FORBIDDEN:
267 0 : lr.hr.ec = TALER_JSON_get_error_code (j);
268 0 : lr.hr.hint = TALER_JSON_get_error_hint (j);
269 0 : break;
270 0 : case MHD_HTTP_NOT_FOUND:
271 0 : lr.hr.ec = TALER_JSON_get_error_code (j);
272 0 : lr.hr.hint = TALER_JSON_get_error_hint (j);
273 0 : break;
274 0 : case MHD_HTTP_INTERNAL_SERVER_ERROR:
275 0 : lr.hr.ec = TALER_JSON_get_error_code (j);
276 0 : lr.hr.hint = TALER_JSON_get_error_hint (j);
277 : /* Server had an internal issue; we should retry, but this API
278 : leaves this to the application */
279 0 : break;
280 0 : default:
281 : /* unexpected response code */
282 0 : GNUNET_break_op (0);
283 0 : lr.hr.ec = TALER_JSON_get_error_code (j);
284 0 : lr.hr.hint = TALER_JSON_get_error_hint (j);
285 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
286 : "Unexpected response code %u/%d for get AML attributes\n",
287 : (unsigned int) response_code,
288 : (int) lr.hr.ec);
289 0 : break;
290 : }
291 0 : if (NULL != aagh->cb)
292 0 : aagh->cb (aagh->cb_cls,
293 : &lr);
294 0 : TALER_EXCHANGE_get_aml_attributes_cancel (aagh);
295 : }
296 :
297 :
298 : struct TALER_EXCHANGE_GetAmlAttributesHandle *
299 0 : TALER_EXCHANGE_get_aml_attributes_create (
300 : struct GNUNET_CURL_Context *ctx,
301 : const char *url,
302 : const struct TALER_AmlOfficerPrivateKeyP *officer_priv,
303 : const struct TALER_NormalizedPaytoHashP *h_payto)
304 : {
305 : struct TALER_EXCHANGE_GetAmlAttributesHandle *aagh;
306 :
307 0 : aagh = GNUNET_new (struct TALER_EXCHANGE_GetAmlAttributesHandle);
308 0 : aagh->ctx = ctx;
309 0 : aagh->base_url = GNUNET_strdup (url);
310 0 : aagh->h_payto = *h_payto;
311 0 : aagh->officer_priv = *officer_priv;
312 0 : GNUNET_CRYPTO_eddsa_key_get_public (&officer_priv->eddsa_priv,
313 : &aagh->officer_pub.eddsa_pub);
314 0 : aagh->options.limit = -20;
315 0 : aagh->options.offset = UINT64_MAX;
316 0 : return aagh;
317 : }
318 :
319 :
320 : enum GNUNET_GenericReturnValue
321 0 : TALER_EXCHANGE_get_aml_attributes_set_options_ (
322 : struct TALER_EXCHANGE_GetAmlAttributesHandle *aagh,
323 : unsigned int num_options,
324 : const struct TALER_EXCHANGE_GetAmlAttributesOptionValue *options)
325 : {
326 0 : for (unsigned int i = 0; i < num_options; i++)
327 : {
328 0 : const struct TALER_EXCHANGE_GetAmlAttributesOptionValue *opt = &options[i];
329 :
330 0 : switch (opt->option)
331 : {
332 0 : case TALER_EXCHANGE_GET_AML_ATTRIBUTES_OPTION_END:
333 0 : return GNUNET_OK;
334 0 : case TALER_EXCHANGE_GET_AML_ATTRIBUTES_OPTION_LIMIT:
335 0 : aagh->options.limit = opt->details.limit;
336 0 : break;
337 0 : case TALER_EXCHANGE_GET_AML_ATTRIBUTES_OPTION_OFFSET:
338 0 : aagh->options.offset = opt->details.offset;
339 0 : break;
340 : }
341 : }
342 0 : return GNUNET_OK;
343 : }
344 :
345 :
346 : enum TALER_ErrorCode
347 0 : TALER_EXCHANGE_get_aml_attributes_start (
348 : struct TALER_EXCHANGE_GetAmlAttributesHandle *aagh,
349 : TALER_EXCHANGE_GetAmlAttributesCallback cb,
350 : TALER_EXCHANGE_GET_AML_ATTRIBUTES_RESULT_CLOSURE *cb_cls)
351 : {
352 : struct TALER_AmlOfficerSignatureP officer_sig;
353 : char arg_str[sizeof (aagh->officer_pub) * 2
354 : + sizeof (aagh->h_payto) * 2
355 : + 32];
356 : CURL *eh;
357 :
358 0 : if (NULL != aagh->job)
359 : {
360 0 : GNUNET_break (0);
361 0 : return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
362 : }
363 0 : aagh->cb = cb;
364 0 : aagh->cb_cls = cb_cls;
365 0 : TALER_officer_aml_query_sign (&aagh->officer_priv,
366 : &officer_sig);
367 : {
368 : char payto_s[sizeof (aagh->h_payto) * 2];
369 : char pub_str[sizeof (aagh->officer_pub) * 2];
370 : char *end;
371 :
372 0 : end = GNUNET_STRINGS_data_to_string (
373 0 : &aagh->h_payto,
374 : sizeof (aagh->h_payto),
375 : payto_s,
376 : sizeof (payto_s));
377 0 : *end = '\0';
378 0 : end = GNUNET_STRINGS_data_to_string (
379 0 : &aagh->officer_pub,
380 : sizeof (aagh->officer_pub),
381 : pub_str,
382 : sizeof (pub_str));
383 0 : *end = '\0';
384 0 : GNUNET_snprintf (arg_str,
385 : sizeof (arg_str),
386 : "aml/%s/attributes/%s",
387 : pub_str,
388 : payto_s);
389 : }
390 : {
391 : char limit_s[24];
392 : char offset_s[24];
393 :
394 0 : GNUNET_snprintf (limit_s,
395 : sizeof (limit_s),
396 : "%lld",
397 0 : (long long) aagh->options.limit);
398 0 : GNUNET_snprintf (offset_s,
399 : sizeof (offset_s),
400 : "%llu",
401 0 : (unsigned long long) aagh->options.offset);
402 0 : aagh->url = TALER_url_join (aagh->base_url,
403 : arg_str,
404 : "limit",
405 : limit_s,
406 : "offset",
407 : offset_s,
408 : NULL);
409 : }
410 0 : if (NULL == aagh->url)
411 0 : return TALER_EC_GENERIC_CONFIGURATION_INVALID;
412 0 : eh = TALER_EXCHANGE_curl_easy_get_ (aagh->url);
413 0 : if (NULL == eh)
414 : {
415 0 : GNUNET_free (aagh->url);
416 0 : aagh->url = NULL;
417 0 : return TALER_EC_GENERIC_CONFIGURATION_INVALID;
418 : }
419 : {
420 0 : struct curl_slist *job_headers = NULL;
421 : char *hdr;
422 : char sig_str[sizeof (officer_sig) * 2];
423 : char *end;
424 :
425 0 : end = GNUNET_STRINGS_data_to_string (
426 : &officer_sig,
427 : sizeof (officer_sig),
428 : sig_str,
429 : sizeof (sig_str));
430 0 : *end = '\0';
431 0 : GNUNET_asprintf (&hdr,
432 : "%s: %s",
433 : TALER_AML_OFFICER_SIGNATURE_HEADER,
434 : sig_str);
435 0 : job_headers = curl_slist_append (NULL,
436 : hdr);
437 0 : GNUNET_free (hdr);
438 0 : job_headers = curl_slist_append (job_headers,
439 : "Content-type: application/json");
440 0 : aagh->job = GNUNET_CURL_job_add2 (aagh->ctx,
441 : eh,
442 : job_headers,
443 : &handle_get_aml_attributes_finished,
444 : aagh);
445 0 : curl_slist_free_all (job_headers);
446 : }
447 0 : if (NULL == aagh->job)
448 : {
449 0 : GNUNET_free (aagh->url);
450 0 : aagh->url = NULL;
451 0 : return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
452 : }
453 0 : return TALER_EC_NONE;
454 : }
455 :
456 :
457 : void
458 0 : TALER_EXCHANGE_get_aml_attributes_cancel (
459 : struct TALER_EXCHANGE_GetAmlAttributesHandle *aagh)
460 : {
461 0 : if (NULL != aagh->job)
462 : {
463 0 : GNUNET_CURL_job_cancel (aagh->job);
464 0 : aagh->job = NULL;
465 : }
466 0 : GNUNET_free (aagh->url);
467 0 : GNUNET_free (aagh->base_url);
468 0 : GNUNET_free (aagh);
469 0 : }
470 :
471 :
472 : /* end of exchange_api_lookup_kyc_attributes.c */
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