Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2020 Taler Systems SA
4 :
5 : TALER is free software; you can redistribute it and/or modify it under the
6 : terms of the GNU Affero 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 Affero General Public License for more details.
12 :
13 : You should have received a copy of the GNU Affero General Public License along with
14 : TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
15 : */
16 : /**
17 : * @file taler-exchange-httpd_management_wire_disable.c
18 : * @brief Handle request to disable wire account.
19 : * @author Christian Grothoff
20 : */
21 : #include "platform.h"
22 : #include <gnunet/gnunet_util_lib.h>
23 : #include <gnunet/gnunet_json_lib.h>
24 : #include <jansson.h>
25 : #include <microhttpd.h>
26 : #include <pthread.h>
27 : #include "taler_json_lib.h"
28 : #include "taler_mhd_lib.h"
29 : #include "taler-exchange-httpd_management.h"
30 : #include "taler-exchange-httpd_responses.h"
31 : #include "taler-exchange-httpd_wire.h"
32 :
33 :
34 : /**
35 : * Closure for the #del_wire transaction.
36 : */
37 : struct DelWireContext
38 : {
39 : /**
40 : * Master signature affirming the WIRE DEL operation
41 : * (includes timestamp).
42 : */
43 : struct TALER_MasterSignatureP master_sig;
44 :
45 : /**
46 : * Payto:// URI this is about.
47 : */
48 : const char *payto_uri;
49 :
50 : /**
51 : * Timestamp for checking against replay attacks.
52 : */
53 : struct GNUNET_TIME_Absolute validity_end;
54 :
55 : };
56 :
57 :
58 : /**
59 : * Function implementing database transaction to del an wire. Runs the
60 : * transaction logic; IF it returns a non-error code, the transaction logic
61 : * MUST NOT queue a MHD response. IF it returns an hard error, the
62 : * transaction logic MUST queue a MHD response and set @a mhd_ret. IF it
63 : * returns the soft error code, the function MAY be called again to retry and
64 : * MUST not queue a MHD response.
65 : *
66 : * @param cls closure with a `struct DelWireContext`
67 : * @param connection MHD request which triggered the transaction
68 : * @param[out] mhd_ret set to MHD response status for @a connection,
69 : * if transaction failed (!)
70 : * @return transaction status
71 : */
72 : static enum GNUNET_DB_QueryStatus
73 2 : del_wire (void *cls,
74 : struct MHD_Connection *connection,
75 : MHD_RESULT *mhd_ret)
76 : {
77 2 : struct DelWireContext *awc = cls;
78 : struct GNUNET_TIME_Absolute last_date;
79 : enum GNUNET_DB_QueryStatus qs;
80 :
81 2 : qs = TEH_plugin->lookup_wire_timestamp (TEH_plugin->cls,
82 : awc->payto_uri,
83 : &last_date);
84 2 : if (qs < 0)
85 : {
86 0 : if (GNUNET_DB_STATUS_SOFT_ERROR == qs)
87 0 : return qs;
88 0 : GNUNET_break (0);
89 0 : *mhd_ret = TALER_MHD_reply_with_error (connection,
90 : MHD_HTTP_INTERNAL_SERVER_ERROR,
91 : TALER_EC_GENERIC_DB_FETCH_FAILED,
92 : "lookup wire");
93 0 : return qs;
94 : }
95 2 : if (last_date.abs_value_us > awc->validity_end.abs_value_us)
96 : {
97 0 : *mhd_ret = TALER_MHD_reply_with_error (
98 : connection,
99 : MHD_HTTP_CONFLICT,
100 : TALER_EC_EXCHANGE_MANAGEMENT_WIRE_MORE_RECENT_PRESENT,
101 : NULL);
102 0 : return GNUNET_DB_STATUS_HARD_ERROR;
103 : }
104 2 : if (0 == qs)
105 : {
106 1 : *mhd_ret = TALER_MHD_reply_with_error (
107 : connection,
108 : MHD_HTTP_NOT_FOUND,
109 : TALER_EC_EXCHANGE_MANAGEMENT_WIRE_NOT_FOUND,
110 : NULL);
111 1 : return GNUNET_DB_STATUS_HARD_ERROR;
112 : }
113 1 : qs = TEH_plugin->update_wire (TEH_plugin->cls,
114 : awc->payto_uri,
115 : awc->validity_end,
116 : false);
117 1 : if (qs < 0)
118 : {
119 0 : GNUNET_break (0);
120 0 : if (GNUNET_DB_STATUS_SOFT_ERROR == qs)
121 0 : return qs;
122 0 : *mhd_ret = TALER_MHD_reply_with_error (connection,
123 : MHD_HTTP_INTERNAL_SERVER_ERROR,
124 : TALER_EC_GENERIC_DB_STORE_FAILED,
125 : "del wire");
126 0 : return qs;
127 : }
128 1 : return qs;
129 : }
130 :
131 :
132 : MHD_RESULT
133 3 : TEH_handler_management_post_wire_disable (
134 : struct MHD_Connection *connection,
135 : const json_t *root)
136 : {
137 : struct DelWireContext awc;
138 : struct GNUNET_JSON_Specification spec[] = {
139 3 : GNUNET_JSON_spec_fixed_auto ("master_sig_del",
140 : &awc.master_sig),
141 3 : GNUNET_JSON_spec_string ("payto_uri",
142 : &awc.payto_uri),
143 3 : TALER_JSON_spec_absolute_time ("validity_end",
144 : &awc.validity_end),
145 3 : GNUNET_JSON_spec_end ()
146 : };
147 :
148 : {
149 : enum GNUNET_GenericReturnValue res;
150 :
151 3 : res = TALER_MHD_parse_json_data (connection,
152 : root,
153 : spec);
154 3 : if (GNUNET_SYSERR == res)
155 0 : return MHD_NO; /* hard failure */
156 3 : if (GNUNET_NO == res)
157 0 : return MHD_YES; /* failure */
158 : }
159 3 : if (GNUNET_OK !=
160 3 : TALER_exchange_offline_wire_del_verify (
161 : awc.payto_uri,
162 : awc.validity_end,
163 : &TEH_master_public_key,
164 : &awc.master_sig))
165 : {
166 1 : GNUNET_break_op (0);
167 1 : return TALER_MHD_reply_with_error (
168 : connection,
169 : MHD_HTTP_FORBIDDEN,
170 : TALER_EC_EXCHANGE_MANAGEMENT_WIRE_DEL_SIGNATURE_INVALID,
171 : NULL);
172 : }
173 :
174 : {
175 : enum GNUNET_GenericReturnValue res;
176 : MHD_RESULT ret;
177 :
178 2 : res = TEH_DB_run_transaction (connection,
179 : "del wire",
180 : &ret,
181 : &del_wire,
182 : &awc);
183 2 : if (GNUNET_SYSERR == res)
184 1 : return ret;
185 : }
186 1 : TEH_wire_update_state ();
187 1 : return TALER_MHD_reply_static (
188 : connection,
189 : MHD_HTTP_NO_CONTENT,
190 : NULL,
191 : NULL,
192 : 0);
193 : }
194 :
195 :
196 : /* end of taler-exchange-httpd_management_wire_disable.c */
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