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