Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2015-2026 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-auditors-AUDITOR_PUB-H_DENOM_PUB.c
19 : * @brief functions for the auditor to add its signature for denomination at the exchange
20 : * @author Christian Grothoff
21 : */
22 : #include "taler/taler_json_lib.h"
23 : #include <gnunet/gnunet_curl_lib.h>
24 : #include <microhttpd.h>
25 : #include "taler/exchange/post-auditors-AUDITOR_PUB-H_DENOM_PUB.h"
26 : #include "auditor_api_curl_defaults.h"
27 : #include "taler/taler_curl_lib.h"
28 :
29 :
30 : struct TALER_EXCHANGE_PostAuditorsHandle
31 : {
32 :
33 : /**
34 : * The base URL for this request.
35 : */
36 : char *base_url;
37 :
38 : /**
39 : * The full URL for this request, set during _start.
40 : */
41 : char *url;
42 :
43 : /**
44 : * Minor context that holds body and headers.
45 : */
46 : struct TALER_CURL_PostContext post_ctx;
47 :
48 : /**
49 : * Handle for the request.
50 : */
51 : struct GNUNET_CURL_Job *job;
52 :
53 : /**
54 : * Function to call with the result.
55 : */
56 : TALER_EXCHANGE_PostAuditorsCallback cb;
57 :
58 : /**
59 : * Closure for @a cb.
60 : */
61 : TALER_EXCHANGE_POST_AUDITORS_RESULT_CLOSURE *cb_cls;
62 :
63 : /**
64 : * Reference to the execution context.
65 : */
66 : struct GNUNET_CURL_Context *ctx;
67 :
68 : /**
69 : * Hash of the denomination public key.
70 : */
71 : struct TALER_DenominationHashP h_denom_pub;
72 :
73 : /**
74 : * The auditor's public key.
75 : */
76 : struct TALER_AuditorPublicKeyP auditor_pub;
77 :
78 : /**
79 : * The auditor's signature.
80 : */
81 : struct TALER_AuditorSignatureP auditor_sig;
82 :
83 : };
84 :
85 :
86 : /**
87 : * Function called when we're done processing the
88 : * HTTP POST /auditor/$AUDITOR_PUB/$H_DENOM_PUB request.
89 : *
90 : * @param cls the `struct TALER_EXCHANGE_PostAuditorsHandle *`
91 : * @param response_code HTTP response code, 0 on error
92 : * @param response response body, NULL if not in JSON
93 : */
94 : static void
95 240 : handle_auditor_add_denomination_finished (void *cls,
96 : long response_code,
97 : const void *response)
98 : {
99 240 : struct TALER_EXCHANGE_PostAuditorsHandle *ah = cls;
100 240 : const json_t *json = response;
101 240 : struct TALER_EXCHANGE_PostAuditorsResponse adr = {
102 240 : .hr.http_status = (unsigned int) response_code,
103 : .hr.reply = json
104 : };
105 :
106 240 : ah->job = NULL;
107 240 : switch (response_code)
108 : {
109 240 : case MHD_HTTP_NO_CONTENT:
110 240 : break;
111 0 : case MHD_HTTP_FORBIDDEN:
112 0 : adr.hr.ec = TALER_JSON_get_error_code (json);
113 0 : adr.hr.hint = TALER_JSON_get_error_hint (json);
114 0 : break;
115 0 : case MHD_HTTP_NOT_FOUND:
116 0 : adr.hr.ec = TALER_JSON_get_error_code (json);
117 0 : adr.hr.hint = TALER_JSON_get_error_hint (json);
118 0 : break;
119 0 : case MHD_HTTP_GONE:
120 0 : adr.hr.ec = TALER_JSON_get_error_code (json);
121 0 : adr.hr.hint = TALER_JSON_get_error_hint (json);
122 0 : break;
123 0 : case MHD_HTTP_PRECONDITION_FAILED:
124 0 : adr.hr.ec = TALER_JSON_get_error_code (json);
125 0 : adr.hr.hint = TALER_JSON_get_error_hint (json);
126 0 : break;
127 0 : default:
128 : /* unexpected response code */
129 0 : if (NULL != json)
130 : {
131 0 : adr.hr.ec = TALER_JSON_get_error_code (json);
132 0 : adr.hr.hint = TALER_JSON_get_error_hint (json);
133 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
134 : "Unexpected response code %u/%d for exchange auditor-add-denomination at URL `%s'\n",
135 : (unsigned int) response_code,
136 : (int) adr.hr.ec,
137 : ah->url);
138 : }
139 : else
140 : {
141 0 : adr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
142 0 : adr.hr.hint = NULL;
143 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
144 : "Unexpected HTTP response code %u (no JSON returned) at URL `%s'\n",
145 : (unsigned int) response_code,
146 : ah->url);
147 : }
148 0 : break;
149 : }
150 240 : if (NULL != ah->cb)
151 : {
152 240 : ah->cb (ah->cb_cls,
153 : &adr);
154 240 : ah->cb = NULL;
155 : }
156 240 : TALER_EXCHANGE_post_auditors_cancel (ah);
157 240 : }
158 :
159 :
160 : struct TALER_EXCHANGE_PostAuditorsHandle *
161 240 : TALER_EXCHANGE_post_auditors_create (
162 : struct GNUNET_CURL_Context *ctx,
163 : const char *url,
164 : const struct TALER_DenominationHashP *h_denom_pub,
165 : const struct TALER_AuditorPublicKeyP *auditor_pub,
166 : const struct TALER_AuditorSignatureP *auditor_sig)
167 : {
168 : struct TALER_EXCHANGE_PostAuditorsHandle *ah;
169 :
170 240 : ah = GNUNET_new (struct TALER_EXCHANGE_PostAuditorsHandle);
171 240 : ah->ctx = ctx;
172 240 : ah->base_url = GNUNET_strdup (url);
173 240 : ah->h_denom_pub = *h_denom_pub;
174 240 : ah->auditor_pub = *auditor_pub;
175 240 : ah->auditor_sig = *auditor_sig;
176 240 : return ah;
177 : }
178 :
179 :
180 : enum TALER_ErrorCode
181 240 : TALER_EXCHANGE_post_auditors_start (
182 : struct TALER_EXCHANGE_PostAuditorsHandle *ah,
183 : TALER_EXCHANGE_PostAuditorsCallback cb,
184 : TALER_EXCHANGE_POST_AUDITORS_RESULT_CLOSURE *cb_cls)
185 : {
186 : CURL *eh;
187 : json_t *body;
188 :
189 240 : ah->cb = cb;
190 240 : ah->cb_cls = cb_cls;
191 : {
192 : char apub_str[sizeof (ah->auditor_pub) * 2];
193 : char denom_str[sizeof (ah->h_denom_pub) * 2];
194 : char arg_str[sizeof (apub_str) + sizeof (denom_str) + 32];
195 : char *end;
196 :
197 240 : end = GNUNET_STRINGS_data_to_string (&ah->auditor_pub,
198 : sizeof (ah->auditor_pub),
199 : apub_str,
200 : sizeof (apub_str));
201 240 : *end = '\0';
202 240 : end = GNUNET_STRINGS_data_to_string (&ah->h_denom_pub,
203 : sizeof (ah->h_denom_pub),
204 : denom_str,
205 : sizeof (denom_str));
206 240 : *end = '\0';
207 240 : GNUNET_snprintf (arg_str,
208 : sizeof (arg_str),
209 : "auditors/%s/%s",
210 : apub_str,
211 : denom_str);
212 240 : ah->url = TALER_url_join (ah->base_url,
213 : arg_str,
214 : NULL);
215 : }
216 240 : if (NULL == ah->url)
217 : {
218 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
219 : "Could not construct request URL.\n");
220 0 : return TALER_EC_GENERIC_CONFIGURATION_INVALID;
221 : }
222 240 : body = GNUNET_JSON_PACK (
223 : GNUNET_JSON_pack_data_auto ("auditor_sig",
224 : &ah->auditor_sig));
225 240 : eh = TALER_AUDITOR_curl_easy_get_ (ah->url);
226 480 : if ( (NULL == eh) ||
227 : (GNUNET_OK !=
228 240 : TALER_curl_easy_post (&ah->post_ctx,
229 : eh,
230 : body)) )
231 : {
232 0 : GNUNET_break (0);
233 0 : if (NULL != eh)
234 0 : curl_easy_cleanup (eh);
235 0 : json_decref (body);
236 0 : return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
237 : }
238 240 : json_decref (body);
239 240 : GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
240 : "Requesting URL '%s'\n",
241 : ah->url);
242 480 : ah->job = GNUNET_CURL_job_add2 (ah->ctx,
243 : eh,
244 240 : ah->post_ctx.headers,
245 : &handle_auditor_add_denomination_finished,
246 : ah);
247 240 : if (NULL == ah->job)
248 0 : return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
249 240 : return TALER_EC_NONE;
250 : }
251 :
252 :
253 : void
254 240 : TALER_EXCHANGE_post_auditors_cancel (
255 : struct TALER_EXCHANGE_PostAuditorsHandle *ah)
256 : {
257 240 : if (NULL != ah->job)
258 : {
259 0 : GNUNET_CURL_job_cancel (ah->job);
260 0 : ah->job = NULL;
261 : }
262 240 : TALER_curl_easy_post_finished (&ah->post_ctx);
263 240 : GNUNET_free (ah->url);
264 240 : GNUNET_free (ah->base_url);
265 240 : GNUNET_free (ah);
266 240 : }
267 :
268 :
269 : /* end of exchange_api_post-auditors-AUDITOR_PUB-H_DENOM_PUB.c */
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