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1 : /* 2 : This file is part of TALER 3 : Copyright (C) 2022 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 <http://www.gnu.org/licenses/> 15 : */ 16 : /** 17 : * @file exchangedb/pg_iterate_active_signkeys.c 18 : * @brief Implementation of the iterate_active_signkeys function for Postgres 19 : * @author Christian Grothoff 20 : */ 21 : #include "platform.h" 22 : #include "taler_error_codes.h" 23 : #include "taler_dbevents.h" 24 : #include "taler_pq_lib.h" 25 : #include "pg_iterate_active_signkeys.h" 26 : #include "pg_helper.h" 27 : 28 : 29 : /** 30 : * Closure for #signkeys_cb_helper() 31 : */ 32 : struct SignkeysIteratorContext 33 : { 34 : /** 35 : * Function to call with the results. 36 : */ 37 : TALER_EXCHANGEDB_ActiveSignkeysCallback cb; 38 : 39 : /** 40 : * Closure to pass to @e cb 41 : */ 42 : void *cb_cls; 43 : 44 : }; 45 : 46 : 47 : /** 48 : * Helper function for #TEH_PG_iterate_active_signkeys(). 49 : * Calls the callback with each signkey. 50 : * 51 : * @param cls a `struct SignkeysIteratorContext` 52 : * @param result db results 53 : * @param num_results number of results in @a result 54 : */ 55 : static void 56 89 : signkeys_cb_helper (void *cls, 57 : PGresult *result, 58 : unsigned int num_results) 59 : { 60 89 : struct SignkeysIteratorContext *dic = cls; 61 : 62 208 : for (unsigned int i = 0; i<num_results; i++) 63 : { 64 : struct TALER_EXCHANGEDB_SignkeyMetaData meta; 65 : struct TALER_ExchangePublicKeyP exchange_pub; 66 : struct TALER_MasterSignatureP master_sig; 67 119 : struct GNUNET_PQ_ResultSpec rs[] = { 68 119 : GNUNET_PQ_result_spec_auto_from_type ("master_sig", 69 : &master_sig), 70 119 : GNUNET_PQ_result_spec_auto_from_type ("exchange_pub", 71 : &exchange_pub), 72 119 : GNUNET_PQ_result_spec_timestamp ("valid_from", 73 : &meta.start), 74 119 : GNUNET_PQ_result_spec_timestamp ("expire_sign", 75 : &meta.expire_sign), 76 119 : GNUNET_PQ_result_spec_timestamp ("expire_legal", 77 : &meta.expire_legal), 78 : GNUNET_PQ_result_spec_end 79 : }; 80 : 81 119 : if (GNUNET_OK != 82 119 : GNUNET_PQ_extract_result (result, 83 : rs, 84 : i)) 85 : { 86 0 : GNUNET_break (0); 87 0 : return; 88 : } 89 119 : dic->cb (dic->cb_cls, 90 : &exchange_pub, 91 : &meta, 92 : &master_sig); 93 : } 94 : } 95 : 96 : 97 : /** 98 : * Function called to invoke @a cb on every non-revoked exchange signing key 99 : * that has been signed by the master key. Revoked and (for signing!) 100 : * expired keys are skipped. Runs in its own read-only transaction. 101 : * 102 : * @param cls the @e cls of this struct with the plugin-specific state 103 : * @param cb function to call on each signing key 104 : * @param cb_cls closure for @a cb 105 : * @return transaction status code 106 : */ 107 : enum GNUNET_DB_QueryStatus 108 89 : TEH_PG_iterate_active_signkeys (void *cls, 109 : TALER_EXCHANGEDB_ActiveSignkeysCallback cb, 110 : void *cb_cls) 111 : { 112 89 : struct PostgresClosure *pg = cls; 113 89 : struct GNUNET_TIME_Absolute now = {0}; 114 89 : struct GNUNET_PQ_QueryParam params[] = { 115 89 : GNUNET_PQ_query_param_absolute_time (&now), 116 : GNUNET_PQ_query_param_end 117 : }; 118 89 : struct SignkeysIteratorContext dic = { 119 : .cb = cb, 120 : .cb_cls = cb_cls, 121 : }; 122 : 123 89 : PREPARE (pg, 124 : "select_signkeys", 125 : "SELECT" 126 : " master_sig" 127 : ",exchange_pub" 128 : ",valid_from" 129 : ",expire_sign" 130 : ",expire_legal" 131 : " FROM exchange_sign_keys esk" 132 : " WHERE" 133 : " expire_sign > $1" 134 : " AND NOT EXISTS " 135 : " (SELECT esk_serial " 136 : " FROM signkey_revocations skr" 137 : " WHERE esk.esk_serial = skr.esk_serial);"); 138 89 : now = GNUNET_TIME_absolute_get (); 139 89 : return GNUNET_PQ_eval_prepared_multi_select (pg->conn, 140 : "select_signkeys", 141 : params, 142 : &signkeys_cb_helper, 143 : &dic); 144 : }