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 "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 "exchange_api_curl_defaults.h"
28 : #include "taler/taler_signatures.h"
29 : #include "taler/taler_curl_lib.h"
30 : #include "taler/taler_json_lib.h"
31 :
32 :
33 : struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle
34 : {
35 :
36 : /**
37 : * The url for this request.
38 : */
39 : char *url;
40 :
41 : /**
42 : * Minor context that holds body and headers.
43 : */
44 : struct TALER_CURL_PostContext post_ctx;
45 :
46 : /**
47 : * Handle for the request.
48 : */
49 : struct GNUNET_CURL_Job *job;
50 :
51 : /**
52 : * Function to call with the result.
53 : */
54 : TALER_EXCHANGE_ManagementRevokeSigningKeyCallback cb;
55 :
56 : /**
57 : * Closure for @a cb.
58 : */
59 : void *cb_cls;
60 :
61 : /**
62 : * Reference to the execution context.
63 : */
64 : struct GNUNET_CURL_Context *ctx;
65 : };
66 :
67 :
68 : /**
69 : * Function called when we're done processing the
70 : * HTTP /management/signkeys/%s/revoke request.
71 : *
72 : * @param cls the `struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle *`
73 : * @param response_code HTTP response code, 0 on error
74 : * @param response response body, NULL if not in JSON
75 : */
76 : static void
77 0 : handle_revoke_signing_finished (void *cls,
78 : long response_code,
79 : const void *response)
80 : {
81 0 : struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle *rh = cls;
82 0 : const json_t *json = response;
83 0 : struct TALER_EXCHANGE_ManagementRevokeSigningKeyResponse rsr = {
84 0 : .hr.http_status = (unsigned int) response_code,
85 : .hr.reply = json
86 : };
87 :
88 0 : rh->job = NULL;
89 0 : switch (response_code)
90 : {
91 0 : case 0:
92 : /* no reply */
93 0 : rsr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
94 0 : rsr.hr.hint = "server offline?";
95 0 : break;
96 0 : case MHD_HTTP_NO_CONTENT:
97 0 : break;
98 0 : case MHD_HTTP_FORBIDDEN:
99 0 : rsr.hr.ec = TALER_JSON_get_error_code (json);
100 0 : rsr.hr.hint = TALER_JSON_get_error_hint (json);
101 0 : break;
102 0 : default:
103 : /* unexpected response code */
104 0 : GNUNET_break_op (0);
105 0 : rsr.hr.ec = TALER_JSON_get_error_code (json);
106 0 : rsr.hr.hint = TALER_JSON_get_error_hint (json);
107 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
108 : "Unexpected response code %u/%d for exchange management revoke signkey\n",
109 : (unsigned int) response_code,
110 : (int) rsr.hr.ec);
111 0 : break;
112 : }
113 0 : if (NULL != rh->cb)
114 : {
115 0 : rh->cb (rh->cb_cls,
116 : &rsr);
117 0 : rh->cb = NULL;
118 : }
119 0 : TALER_EXCHANGE_management_revoke_signing_key_cancel (rh);
120 0 : }
121 :
122 :
123 : struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle *
124 0 : TALER_EXCHANGE_management_revoke_signing_key (
125 : struct GNUNET_CURL_Context *ctx,
126 : const char *url,
127 : const struct TALER_ExchangePublicKeyP *exchange_pub,
128 : const struct TALER_MasterSignatureP *master_sig,
129 : TALER_EXCHANGE_ManagementRevokeSigningKeyCallback cb,
130 : void *cb_cls)
131 : {
132 : struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle *rh;
133 : CURL *eh;
134 : json_t *body;
135 :
136 0 : rh = GNUNET_new (struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle);
137 0 : rh->cb = cb;
138 0 : rh->cb_cls = cb_cls;
139 0 : rh->ctx = ctx;
140 : {
141 : char epub_str[sizeof (*exchange_pub) * 2];
142 : char arg_str[sizeof (epub_str) + 64];
143 : char *end;
144 :
145 0 : end = GNUNET_STRINGS_data_to_string (exchange_pub,
146 : sizeof (*exchange_pub),
147 : epub_str,
148 : sizeof (epub_str));
149 0 : *end = '\0';
150 0 : GNUNET_snprintf (arg_str,
151 : sizeof (arg_str),
152 : "management/signkeys/%s/revoke",
153 : epub_str);
154 0 : rh->url = TALER_url_join (url,
155 : arg_str,
156 : NULL);
157 : }
158 0 : if (NULL == rh->url)
159 : {
160 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
161 : "Could not construct request URL.\n");
162 0 : GNUNET_free (rh);
163 0 : return NULL;
164 : }
165 0 : body = GNUNET_JSON_PACK (
166 : GNUNET_JSON_pack_data_auto ("master_sig",
167 : master_sig));
168 0 : eh = TALER_EXCHANGE_curl_easy_get_ (rh->url);
169 0 : if ( (NULL == eh) ||
170 : (GNUNET_OK !=
171 0 : TALER_curl_easy_post (&rh->post_ctx,
172 : eh,
173 : body)) )
174 : {
175 0 : GNUNET_break (0);
176 0 : if (NULL != eh)
177 0 : curl_easy_cleanup (eh);
178 0 : json_decref (body);
179 0 : GNUNET_free (rh->url);
180 0 : GNUNET_free (rh);
181 0 : return NULL;
182 : }
183 0 : json_decref (body);
184 0 : GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
185 : "Requesting URL '%s'\n",
186 : rh->url);
187 0 : rh->job = GNUNET_CURL_job_add2 (ctx,
188 : eh,
189 0 : rh->post_ctx.headers,
190 : &handle_revoke_signing_finished,
191 : rh);
192 0 : if (NULL == rh->job)
193 : {
194 0 : TALER_EXCHANGE_management_revoke_signing_key_cancel (rh);
195 0 : return NULL;
196 : }
197 0 : return rh;
198 : }
199 :
200 :
201 : void
202 0 : TALER_EXCHANGE_management_revoke_signing_key_cancel (
203 : struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle *rh)
204 : {
205 0 : if (NULL != rh->job)
206 : {
207 0 : GNUNET_CURL_job_cancel (rh->job);
208 0 : rh->job = NULL;
209 : }
210 0 : TALER_curl_easy_post_finished (&rh->post_ctx);
211 0 : GNUNET_free (rh->url);
212 0 : GNUNET_free (rh);
213 0 : }
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