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-management-denominations-H_DENOM_PUB-revoke.c
19 : * @brief functions to revoke an exchange denomination key
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 \
26 : "taler/exchange/post-management-denominations-H_DENOM_PUB-revoke.h"
27 : #include "exchange_api_curl_defaults.h"
28 : #include "taler/taler_curl_lib.h"
29 :
30 :
31 : /**
32 : * @brief Handle for a POST /management/denominations/$H_DENOM_PUB/revoke request.
33 : */
34 : struct TALER_EXCHANGE_PostManagementDenominationsRevokeHandle
35 : {
36 :
37 : /**
38 : * The base URL for this request.
39 : */
40 : char *base_url;
41 :
42 : /**
43 : * The full URL for this request, set during _start.
44 : */
45 : char *url;
46 :
47 : /**
48 : * Minor context that holds body and headers.
49 : */
50 : struct TALER_CURL_PostContext post_ctx;
51 :
52 : /**
53 : * Handle for the request.
54 : */
55 : struct GNUNET_CURL_Job *job;
56 :
57 : /**
58 : * Function to call with the result.
59 : */
60 : TALER_EXCHANGE_PostManagementDenominationsRevokeCallback cb;
61 :
62 : /**
63 : * Closure for @a cb.
64 : */
65 : TALER_EXCHANGE_POST_MANAGEMENT_DENOMINATIONS_REVOKE_RESULT_CLOSURE *cb_cls;
66 :
67 : /**
68 : * Reference to the execution context.
69 : */
70 : struct GNUNET_CURL_Context *ctx;
71 :
72 : /**
73 : * Hash of the denomination public key to revoke.
74 : */
75 : struct TALER_DenominationHashP h_denom_pub;
76 :
77 : /**
78 : * Signature affirming the revocation.
79 : */
80 : struct TALER_MasterSignatureP master_sig;
81 :
82 : };
83 :
84 :
85 : /**
86 : * Function called when we're done processing the
87 : * HTTP POST /management/denominations/$H_DENOM_PUB/revoke request.
88 : *
89 : * @param cls the `struct TALER_EXCHANGE_PostManagementDenominationsRevokeHandle`
90 : * @param response_code HTTP response code, 0 on error
91 : * @param response response body, NULL if not in JSON
92 : */
93 : static void
94 0 : handle_denominations_revoke_finished (void *cls,
95 : long response_code,
96 : const void *response)
97 : {
98 0 : struct TALER_EXCHANGE_PostManagementDenominationsRevokeHandle *pmdrh = cls;
99 0 : const json_t *json = response;
100 0 : struct TALER_EXCHANGE_PostManagementDenominationsRevokeResponse res = {
101 0 : .hr.http_status = (unsigned int) response_code,
102 : .hr.reply = json
103 : };
104 :
105 0 : pmdrh->job = NULL;
106 0 : switch (response_code)
107 : {
108 0 : case 0:
109 : /* no reply */
110 0 : res.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
111 0 : res.hr.hint = "server offline?";
112 0 : break;
113 0 : case MHD_HTTP_NO_CONTENT:
114 0 : break;
115 0 : case MHD_HTTP_FORBIDDEN:
116 0 : res.hr.ec = TALER_JSON_get_error_code (json);
117 0 : res.hr.hint = TALER_JSON_get_error_hint (json);
118 0 : break;
119 0 : default:
120 : /* unexpected response code */
121 0 : GNUNET_break_op (0);
122 0 : res.hr.ec = TALER_JSON_get_error_code (json);
123 0 : res.hr.hint = TALER_JSON_get_error_hint (json);
124 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
125 : "Unexpected response code %u/%d for exchange management revoke denomination\n",
126 : (unsigned int) response_code,
127 : (int) res.hr.ec);
128 0 : break;
129 : }
130 0 : if (NULL != pmdrh->cb)
131 : {
132 0 : pmdrh->cb (pmdrh->cb_cls,
133 : &res);
134 0 : pmdrh->cb = NULL;
135 : }
136 0 : TALER_EXCHANGE_post_management_denominations_revoke_cancel (pmdrh);
137 0 : }
138 :
139 :
140 : struct TALER_EXCHANGE_PostManagementDenominationsRevokeHandle *
141 0 : TALER_EXCHANGE_post_management_denominations_revoke_create (
142 : struct GNUNET_CURL_Context *ctx,
143 : const char *url,
144 : const struct TALER_DenominationHashP *h_denom_pub,
145 : const struct TALER_MasterSignatureP *master_sig)
146 : {
147 : struct TALER_EXCHANGE_PostManagementDenominationsRevokeHandle *pmdrh;
148 :
149 0 : pmdrh = GNUNET_new (
150 : struct TALER_EXCHANGE_PostManagementDenominationsRevokeHandle);
151 0 : pmdrh->ctx = ctx;
152 0 : pmdrh->base_url = GNUNET_strdup (url);
153 0 : pmdrh->h_denom_pub = *h_denom_pub;
154 0 : pmdrh->master_sig = *master_sig;
155 0 : return pmdrh;
156 : }
157 :
158 :
159 : enum TALER_ErrorCode
160 0 : TALER_EXCHANGE_post_management_denominations_revoke_start (
161 : struct TALER_EXCHANGE_PostManagementDenominationsRevokeHandle *pmdrh,
162 : TALER_EXCHANGE_PostManagementDenominationsRevokeCallback cb,
163 : TALER_EXCHANGE_POST_MANAGEMENT_DENOMINATIONS_REVOKE_RESULT_CLOSURE *cb_cls)
164 : {
165 : CURL *eh;
166 : json_t *body;
167 :
168 0 : pmdrh->cb = cb;
169 0 : pmdrh->cb_cls = cb_cls;
170 : {
171 : char epub_str[sizeof (pmdrh->h_denom_pub) * 2];
172 : char arg_str[sizeof (epub_str) + 64];
173 : char *end;
174 :
175 0 : end = GNUNET_STRINGS_data_to_string (&pmdrh->h_denom_pub,
176 : sizeof (pmdrh->h_denom_pub),
177 : epub_str,
178 : sizeof (epub_str));
179 0 : *end = '\0';
180 0 : GNUNET_snprintf (arg_str,
181 : sizeof (arg_str),
182 : "management/denominations/%s/revoke",
183 : epub_str);
184 0 : pmdrh->url = TALER_url_join (pmdrh->base_url,
185 : arg_str,
186 : NULL);
187 : }
188 0 : if (NULL == pmdrh->url)
189 : {
190 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
191 : "Could not construct request URL.\n");
192 0 : return TALER_EC_GENERIC_CONFIGURATION_INVALID;
193 : }
194 0 : body = GNUNET_JSON_PACK (
195 : GNUNET_JSON_pack_data_auto ("master_sig",
196 : &pmdrh->master_sig));
197 0 : eh = TALER_EXCHANGE_curl_easy_get_ (pmdrh->url);
198 0 : if ( (NULL == eh) ||
199 : (GNUNET_OK !=
200 0 : TALER_curl_easy_post (&pmdrh->post_ctx,
201 : eh,
202 : body)) )
203 : {
204 0 : GNUNET_break (0);
205 0 : if (NULL != eh)
206 0 : curl_easy_cleanup (eh);
207 0 : json_decref (body);
208 0 : GNUNET_free (pmdrh->url);
209 0 : pmdrh->url = NULL;
210 0 : return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
211 : }
212 0 : json_decref (body);
213 0 : GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
214 : "Requesting URL '%s'\n",
215 : pmdrh->url);
216 0 : pmdrh->job = GNUNET_CURL_job_add2 (pmdrh->ctx,
217 : eh,
218 0 : pmdrh->post_ctx.headers,
219 : &handle_denominations_revoke_finished,
220 : pmdrh);
221 0 : if (NULL == pmdrh->job)
222 : {
223 0 : GNUNET_break (0);
224 0 : TALER_curl_easy_post_finished (&pmdrh->post_ctx);
225 0 : GNUNET_free (pmdrh->url);
226 0 : pmdrh->url = NULL;
227 0 : return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
228 : }
229 0 : return TALER_EC_NONE;
230 : }
231 :
232 :
233 : void
234 0 : TALER_EXCHANGE_post_management_denominations_revoke_cancel (
235 : struct TALER_EXCHANGE_PostManagementDenominationsRevokeHandle *pmdrh)
236 : {
237 0 : if (NULL != pmdrh->job)
238 : {
239 0 : GNUNET_CURL_job_cancel (pmdrh->job);
240 0 : pmdrh->job = NULL;
241 : }
242 0 : TALER_curl_easy_post_finished (&pmdrh->post_ctx);
243 0 : GNUNET_free (pmdrh->url);
244 0 : GNUNET_free (pmdrh->base_url);
245 0 : GNUNET_free (pmdrh);
246 0 : }
247 :
248 :
249 : /* end of exchange_api_post-management-denominations-H_DENOM_PUB-revoke.c */
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