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/$OFFICER_PUB/attributes request
20 : * @author Christian Grothoff
21 : */
22 : #include <microhttpd.h> /* just for HTTP status codes */
23 : #include <gnunet/gnunet_util_lib.h>
24 : #include <gnunet/gnunet_curl_lib.h>
25 : #include "taler/taler_json_lib.h"
26 : #include "exchange_api_handle.h"
27 : #include "taler/taler_signatures.h"
28 : #include "exchange_api_curl_defaults.h"
29 : #include \
30 : "taler/exchange/get-aml-OFFICER_PUB-attributes-H_NORMALIZED_PAYTO.h"
31 :
32 :
33 : /**
34 : * @brief A GET /aml/$OFFICER_PUB/attributes/$H_NORMALIZED_PAYTO Handle
35 : */
36 : struct TALER_EXCHANGE_GetAmlAttributesHandle
37 : {
38 :
39 : /**
40 : * Base URL of the exchange.
41 : */
42 : char *base_url;
43 :
44 : /**
45 : * The url for this request.
46 : */
47 : char *url;
48 :
49 : /**
50 : * Handle for the request.
51 : */
52 : struct GNUNET_CURL_Job *job;
53 :
54 : /**
55 : * Function to call with the result.
56 : */
57 : TALER_EXCHANGE_GetAmlAttributesCallback cb;
58 :
59 : /**
60 : * Closure for @e cb.
61 : */
62 : TALER_EXCHANGE_GET_AML_ATTRIBUTES_RESULT_CLOSURE *cb_cls;
63 :
64 : /**
65 : * CURL context to use.
66 : */
67 : struct GNUNET_CURL_Context *ctx;
68 :
69 : /**
70 : * Public key of the AML officer (computed from officer_priv in _create).
71 : */
72 : struct TALER_AmlOfficerPublicKeyP officer_pub;
73 :
74 : /**
75 : * Private key of the AML officer (stored for signing in _start).
76 : */
77 : struct TALER_AmlOfficerPrivateKeyP officer_priv;
78 :
79 : /**
80 : * Hash of the normalized payto URI for the account.
81 : */
82 : struct TALER_NormalizedPaytoHashP h_payto;
83 :
84 : /**
85 : * Options set for this request.
86 : */
87 : struct
88 : {
89 : /**
90 : * Limit on the number of results (negative = before offset, positive = after).
91 : * Default: -20.
92 : */
93 : int64_t limit;
94 :
95 : /**
96 : * Row offset threshold. Default: UINT64_MAX.
97 : */
98 : uint64_t offset;
99 : } options;
100 :
101 : };
102 :
103 :
104 : /**
105 : * Parse AML attribute collection events from a JSON array.
106 : *
107 : * @param jdetails JSON array with AML attribute collection events
108 : * @param[out] detail_ar where to write the results
109 : * @return #GNUNET_OK on success
110 : */
111 : static enum GNUNET_GenericReturnValue
112 0 : parse_attributes (
113 : const json_t *jdetails,
114 : struct TALER_EXCHANGE_GetAmlAttributesCollectionEvent *detail_ar)
115 : {
116 : json_t *obj;
117 : size_t idx;
118 :
119 0 : json_array_foreach (jdetails, idx, obj)
120 : {
121 0 : struct TALER_EXCHANGE_GetAmlAttributesCollectionEvent *detail
122 0 : = &detail_ar[idx];
123 0 : bool by_aml_officer = false;
124 : struct GNUNET_JSON_Specification spec[] = {
125 0 : GNUNET_JSON_spec_uint64 ("rowid",
126 : &detail->rowid),
127 0 : GNUNET_JSON_spec_bool ("by_aml_officer",
128 : &by_aml_officer),
129 0 : GNUNET_JSON_spec_mark_optional (
130 : GNUNET_JSON_spec_object_const ("attributes",
131 : &detail->attributes),
132 : NULL),
133 0 : GNUNET_JSON_spec_timestamp ("collection_time",
134 : &detail->collection_time),
135 0 : GNUNET_JSON_spec_end ()
136 : };
137 :
138 0 : detail->by_aml_officer = false;
139 0 : detail->attributes = NULL;
140 0 : if (GNUNET_OK !=
141 0 : GNUNET_JSON_parse (obj,
142 : spec,
143 : NULL,
144 : NULL))
145 : {
146 0 : GNUNET_break_op (0);
147 0 : return GNUNET_SYSERR;
148 : }
149 0 : detail->by_aml_officer = by_aml_officer;
150 : }
151 0 : return GNUNET_OK;
152 : }
153 :
154 :
155 : /**
156 : * Parse the provided data from the "200 OK" response.
157 : *
158 : * @param[in,out] aagh handle (callback may be zero'ed out)
159 : * @param json json reply with the data
160 : * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
161 : */
162 : static enum GNUNET_GenericReturnValue
163 0 : parse_get_aml_attributes_ok (
164 : struct TALER_EXCHANGE_GetAmlAttributesHandle *aagh,
165 : const json_t *json)
166 : {
167 0 : struct TALER_EXCHANGE_GetAmlAttributesResponse lr = {
168 : .hr.reply = json,
169 : .hr.http_status = MHD_HTTP_OK
170 : };
171 : const json_t *jdetails;
172 : struct GNUNET_JSON_Specification spec[] = {
173 0 : GNUNET_JSON_spec_array_const ("details",
174 : &jdetails),
175 0 : GNUNET_JSON_spec_end ()
176 : };
177 :
178 0 : if (GNUNET_OK !=
179 0 : GNUNET_JSON_parse (json,
180 : spec,
181 : NULL,
182 : NULL))
183 : {
184 0 : GNUNET_break_op (0);
185 0 : return GNUNET_SYSERR;
186 : }
187 0 : lr.details.ok.details_length = json_array_size (jdetails);
188 0 : {
189 0 : struct TALER_EXCHANGE_GetAmlAttributesCollectionEvent details[
190 0 : GNUNET_NZL (lr.details.ok.details_length)];
191 :
192 0 : memset (details,
193 : 0,
194 : sizeof (details));
195 0 : lr.details.ok.details = details;
196 0 : if (GNUNET_OK !=
197 0 : parse_attributes (jdetails,
198 : details))
199 : {
200 0 : GNUNET_break_op (0);
201 0 : return GNUNET_SYSERR;
202 : }
203 0 : aagh->cb (aagh->cb_cls,
204 : &lr);
205 0 : aagh->cb = NULL;
206 : }
207 0 : return GNUNET_OK;
208 : }
209 :
210 :
211 : /**
212 : * Function called when we're done processing the
213 : * HTTP GET /aml/$OFFICER_PUB/attributes/$H_NORMALIZED_PAYTO request (new API).
214 : *
215 : * @param cls the `struct TALER_EXCHANGE_GetAmlAttributesHandle`
216 : * @param response_code HTTP response code, 0 on error
217 : * @param response parsed JSON result, NULL on error
218 : */
219 : static void
220 0 : handle_get_aml_attributes_finished (void *cls,
221 : long response_code,
222 : const void *response)
223 : {
224 0 : struct TALER_EXCHANGE_GetAmlAttributesHandle *aagh = cls;
225 0 : const json_t *j = response;
226 0 : struct TALER_EXCHANGE_GetAmlAttributesResponse lr = {
227 : .hr.reply = j,
228 0 : .hr.http_status = (unsigned int) response_code
229 : };
230 :
231 0 : aagh->job = NULL;
232 0 : switch (response_code)
233 : {
234 0 : case 0:
235 0 : lr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
236 0 : break;
237 0 : case MHD_HTTP_OK:
238 0 : if (GNUNET_OK !=
239 0 : parse_get_aml_attributes_ok (aagh,
240 : j))
241 : {
242 0 : GNUNET_break_op (0);
243 0 : lr.hr.http_status = 0;
244 0 : lr.hr.ec = TALER_EC_GENERIC_REPLY_MALFORMED;
245 0 : break;
246 : }
247 0 : GNUNET_assert (NULL == aagh->cb);
248 0 : TALER_EXCHANGE_get_aml_attributes_cancel (aagh);
249 0 : return;
250 0 : case MHD_HTTP_NO_CONTENT:
251 0 : break;
252 0 : case MHD_HTTP_NOT_IMPLEMENTED:
253 0 : lr.hr.ec = TALER_JSON_get_error_code (j);
254 0 : lr.hr.hint = TALER_JSON_get_error_hint (j);
255 0 : break;
256 0 : case MHD_HTTP_BAD_REQUEST:
257 0 : lr.hr.ec = TALER_JSON_get_error_code (j);
258 0 : lr.hr.hint = TALER_JSON_get_error_hint (j);
259 : /* This should never happen, either us or the exchange is buggy
260 : (or API version conflict); just pass JSON reply to the application */
261 0 : break;
262 0 : case MHD_HTTP_FORBIDDEN:
263 0 : lr.hr.ec = TALER_JSON_get_error_code (j);
264 0 : lr.hr.hint = TALER_JSON_get_error_hint (j);
265 0 : break;
266 0 : case MHD_HTTP_NOT_FOUND:
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_ACCEPTABLE:
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 = INT64_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 : if (opt->details.offset > INT64_MAX)
339 : {
340 0 : GNUNET_break (0);
341 0 : return GNUNET_NO;
342 : }
343 0 : aagh->options.offset = opt->details.offset;
344 0 : break;
345 : }
346 : }
347 0 : return GNUNET_OK;
348 : }
349 :
350 :
351 : enum TALER_ErrorCode
352 0 : TALER_EXCHANGE_get_aml_attributes_start (
353 : struct TALER_EXCHANGE_GetAmlAttributesHandle *aagh,
354 : TALER_EXCHANGE_GetAmlAttributesCallback cb,
355 : TALER_EXCHANGE_GET_AML_ATTRIBUTES_RESULT_CLOSURE *cb_cls)
356 : {
357 : struct TALER_AmlOfficerSignatureP officer_sig;
358 : char arg_str[sizeof (aagh->officer_pub) * 2
359 : + sizeof (aagh->h_payto) * 2
360 : + 32];
361 : CURL *eh;
362 :
363 0 : if (NULL != aagh->job)
364 : {
365 0 : GNUNET_break (0);
366 0 : return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
367 : }
368 0 : aagh->cb = cb;
369 0 : aagh->cb_cls = cb_cls;
370 0 : TALER_officer_aml_query_sign (&aagh->officer_priv,
371 : &officer_sig);
372 : {
373 : char payto_s[sizeof (aagh->h_payto) * 2];
374 : char pub_str[sizeof (aagh->officer_pub) * 2];
375 : char *end;
376 :
377 0 : end = GNUNET_STRINGS_data_to_string (
378 0 : &aagh->h_payto,
379 : sizeof (aagh->h_payto),
380 : payto_s,
381 : sizeof (payto_s));
382 0 : *end = '\0';
383 0 : end = GNUNET_STRINGS_data_to_string (
384 0 : &aagh->officer_pub,
385 : sizeof (aagh->officer_pub),
386 : pub_str,
387 : sizeof (pub_str));
388 0 : *end = '\0';
389 0 : GNUNET_snprintf (arg_str,
390 : sizeof (arg_str),
391 : "aml/%s/attributes/%s",
392 : pub_str,
393 : payto_s);
394 : }
395 : {
396 : char limit_s[24];
397 : char offset_s[24];
398 :
399 0 : GNUNET_snprintf (limit_s,
400 : sizeof (limit_s),
401 : "%lld",
402 0 : (long long) aagh->options.limit);
403 0 : GNUNET_snprintf (offset_s,
404 : sizeof (offset_s),
405 : "%llu",
406 0 : (unsigned long long) aagh->options.offset);
407 0 : aagh->url = TALER_url_join (aagh->base_url,
408 : arg_str,
409 : "limit",
410 : limit_s,
411 : "offset",
412 : offset_s,
413 : NULL);
414 : }
415 0 : if (NULL == aagh->url)
416 0 : return TALER_EC_GENERIC_CONFIGURATION_INVALID;
417 0 : eh = TALER_EXCHANGE_curl_easy_get_ (aagh->url);
418 0 : if (NULL == eh)
419 : {
420 0 : GNUNET_free (aagh->url);
421 0 : aagh->url = NULL;
422 0 : return TALER_EC_GENERIC_CONFIGURATION_INVALID;
423 : }
424 : {
425 0 : struct curl_slist *job_headers = NULL;
426 : char *hdr;
427 : char sig_str[sizeof (officer_sig) * 2];
428 : char *end;
429 :
430 0 : end = GNUNET_STRINGS_data_to_string (
431 : &officer_sig,
432 : sizeof (officer_sig),
433 : sig_str,
434 : sizeof (sig_str));
435 0 : *end = '\0';
436 0 : GNUNET_asprintf (&hdr,
437 : "%s: %s",
438 : TALER_AML_OFFICER_SIGNATURE_HEADER,
439 : sig_str);
440 0 : job_headers = curl_slist_append (NULL,
441 : hdr);
442 0 : GNUNET_free (hdr);
443 0 : aagh->job = GNUNET_CURL_job_add2 (aagh->ctx,
444 : eh,
445 : job_headers,
446 : &handle_get_aml_attributes_finished,
447 : aagh);
448 0 : curl_slist_free_all (job_headers);
449 : }
450 0 : if (NULL == aagh->job)
451 : {
452 0 : GNUNET_free (aagh->url);
453 0 : aagh->url = NULL;
454 0 : return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
455 : }
456 0 : return TALER_EC_NONE;
457 : }
458 :
459 :
460 : void
461 0 : TALER_EXCHANGE_get_aml_attributes_cancel (
462 : struct TALER_EXCHANGE_GetAmlAttributesHandle *aagh)
463 : {
464 0 : if (NULL != aagh->job)
465 : {
466 0 : GNUNET_CURL_job_cancel (aagh->job);
467 0 : aagh->job = NULL;
468 : }
469 0 : GNUNET_free (aagh->url);
470 0 : GNUNET_free (aagh->base_url);
471 0 : GNUNET_free (aagh);
472 0 : }
473 :
474 :
475 : /* end of exchange_api_lookup_kyc_attributes.c */
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