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69 : * The public signing key that was revoked.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