Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2015-2021 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_management_revoke_signing_key.c
19 : * @brief functions to revoke an exchange online signing key
20 : * @author Christian Grothoff
21 : */
22 : #include "platform.h"
23 : #include "taler_json_lib.h"
24 : #include <gnunet/gnunet_curl_lib.h>
25 : #include "taler_exchange_service.h"
26 : #include "exchange_api_curl_defaults.h"
27 : #include "taler_signatures.h"
28 : #include "taler_curl_lib.h"
29 : #include "taler_json_lib.h"
30 :
31 :
32 : struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle
33 : {
34 :
35 : /**
36 : * The url for this request.
37 : */
38 : char *url;
39 :
40 : /**
41 : * Minor context that holds body and headers.
42 : */
43 : struct TALER_CURL_PostContext post_ctx;
44 :
45 : /**
46 : * Handle for the request.
47 : */
48 : struct GNUNET_CURL_Job *job;
49 :
50 : /**
51 : * Function to call with the result.
52 : */
53 : TALER_EXCHANGE_ManagementRevokeSigningKeyCallback cb;
54 :
55 : /**
56 : * Closure for @a cb.
57 : */
58 : void *cb_cls;
59 :
60 : /**
61 : * Reference to the execution context.
62 : */
63 : struct GNUNET_CURL_Context *ctx;
64 : };
65 :
66 :
67 : /**
68 : * Function called when we're done processing the
69 : * HTTP /management/signkeys/%s/revoke request.
70 : *
71 : * @param cls the `struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle *`
72 : * @param response_code HTTP response code, 0 on error
73 : * @param response response body, NULL if not in JSON
74 : */
75 : static void
76 0 : handle_revoke_signing_finished (void *cls,
77 : long response_code,
78 : const void *response)
79 : {
80 0 : struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle *rh = cls;
81 0 : const json_t *json = response;
82 0 : struct TALER_EXCHANGE_HttpResponse hr = {
83 0 : .http_status = (unsigned int) response_code,
84 : .reply = json
85 : };
86 :
87 0 : rh->job = NULL;
88 0 : switch (response_code)
89 : {
90 0 : case 0:
91 : /* no reply */
92 0 : hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
93 0 : hr.hint = "server offline?";
94 0 : break;
95 0 : case MHD_HTTP_NO_CONTENT:
96 0 : break;
97 0 : case MHD_HTTP_FORBIDDEN:
98 0 : hr.ec = TALER_JSON_get_error_code (json);
99 0 : hr.hint = TALER_JSON_get_error_hint (json);
100 0 : break;
101 0 : default:
102 : /* unexpected response code */
103 0 : GNUNET_break_op (0);
104 0 : hr.ec = TALER_JSON_get_error_code (json);
105 0 : hr.hint = TALER_JSON_get_error_hint (json);
106 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
107 : "Unexpected response code %u/%d for exchange management revoke signkey\n",
108 : (unsigned int) response_code,
109 : (int) hr.ec);
110 0 : break;
111 : }
112 0 : if (NULL != rh->cb)
113 : {
114 0 : rh->cb (rh->cb_cls,
115 : &hr);
116 0 : rh->cb = NULL;
117 : }
118 0 : TALER_EXCHANGE_management_revoke_signing_key_cancel (rh);
119 0 : }
120 :
121 :
122 : struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle *
123 0 : TALER_EXCHANGE_management_revoke_signing_key (
124 : struct GNUNET_CURL_Context *ctx,
125 : const char *url,
126 : const struct TALER_ExchangePublicKeyP *exchange_pub,
127 : const struct TALER_MasterSignatureP *master_sig,
128 : TALER_EXCHANGE_ManagementRevokeSigningKeyCallback cb,
129 : void *cb_cls)
130 : {
131 : struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle *rh;
132 : CURL *eh;
133 : json_t *body;
134 :
135 0 : rh = GNUNET_new (struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle);
136 0 : rh->cb = cb;
137 0 : rh->cb_cls = cb_cls;
138 0 : rh->ctx = ctx;
139 : {
140 : char epub_str[sizeof (*exchange_pub) * 2];
141 : char arg_str[sizeof (epub_str) + 64];
142 : char *end;
143 :
144 0 : end = GNUNET_STRINGS_data_to_string (exchange_pub,
145 : sizeof (*exchange_pub),
146 : epub_str,
147 : sizeof (epub_str));
148 0 : *end = '\0';
149 0 : GNUNET_snprintf (arg_str,
150 : sizeof (arg_str),
151 : "management/signkeys/%s/revoke",
152 : epub_str);
153 0 : rh->url = TALER_url_join (url,
154 : arg_str,
155 : NULL);
156 : }
157 0 : if (NULL == rh->url)
158 : {
159 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
160 : "Could not construct request URL.\n");
161 0 : GNUNET_free (rh);
162 0 : return NULL;
163 : }
164 0 : body = GNUNET_JSON_PACK (
165 : GNUNET_JSON_pack_data_auto ("master_sig",
166 : master_sig));
167 0 : eh = TALER_EXCHANGE_curl_easy_get_ (rh->url);
168 0 : if ( (NULL == eh) ||
169 : (GNUNET_OK !=
170 0 : TALER_curl_easy_post (&rh->post_ctx,
171 : eh,
172 : body)) )
173 : {
174 0 : GNUNET_break (0);
175 0 : if (NULL != eh)
176 0 : curl_easy_cleanup (eh);
177 0 : json_decref (body);
178 0 : GNUNET_free (rh->url);
179 0 : return NULL;
180 : }
181 0 : json_decref (body);
182 0 : GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
183 : "Requesting URL '%s'\n",
184 : rh->url);
185 0 : rh->job = GNUNET_CURL_job_add2 (ctx,
186 : eh,
187 0 : rh->post_ctx.headers,
188 : &handle_revoke_signing_finished,
189 : rh);
190 0 : if (NULL == rh->job)
191 : {
192 0 : TALER_EXCHANGE_management_revoke_signing_key_cancel (rh);
193 0 : return NULL;
194 : }
195 0 : return rh;
196 : }
197 :
198 :
199 : void
200 0 : TALER_EXCHANGE_management_revoke_signing_key_cancel (
201 : struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle *rh)
202 : {
203 0 : if (NULL != rh->job)
204 : {
205 0 : GNUNET_CURL_job_cancel (rh->job);
206 0 : rh->job = NULL;
207 : }
208 0 : TALER_curl_easy_post_finished (&rh->post_ctx);
209 0 : GNUNET_free (rh->url);
210 0 : GNUNET_free (rh);
211 0 : }
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