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/*
This file is part of TALER
Copyright (C) 2022 Taler Systems SA
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
TALER is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file exchangedb/pg_iterate_active_signkeys.c
* @brief Implementation of the iterate_active_signkeys function for Postgres
* @author Christian Grothoff
*/
#include "platform.h"
#include "taler_error_codes.h"
#include "taler_dbevents.h"
#include "taler_pq_lib.h"
#include "pg_iterate_active_signkeys.h"
#include "pg_helper.h"
/**
* Closure for #signkeys_cb_helper()
*/
struct SignkeysIteratorContext
{
/**
* Function to call with the results.
*/
TALER_EXCHANGEDB_ActiveSignkeysCallback cb;
/**
* Closure to pass to @e cb
*/
void *cb_cls;
};
/**
* Helper function for #TEH_PG_iterate_active_signkeys().
* Calls the callback with each signkey.
*
* @param cls a `struct SignkeysIteratorContext`
* @param result db results
* @param num_results number of results in @a result
*/
static void
signkeys_cb_helper (void *cls,
PGresult *result,
unsigned int num_results)
{
struct SignkeysIteratorContext *dic = cls;
for (unsigned int i = 0; i<num_results; i++)
{
struct TALER_EXCHANGEDB_SignkeyMetaData meta;
struct TALER_ExchangePublicKeyP exchange_pub;
struct TALER_MasterSignatureP master_sig;
struct GNUNET_PQ_ResultSpec rs[] = {
GNUNET_PQ_result_spec_auto_from_type ("master_sig",
&master_sig),
GNUNET_PQ_result_spec_auto_from_type ("exchange_pub",
&exchange_pub),
GNUNET_PQ_result_spec_timestamp ("valid_from",
&meta.start),
GNUNET_PQ_result_spec_timestamp ("expire_sign",
&meta.expire_sign),
GNUNET_PQ_result_spec_timestamp ("expire_legal",
&meta.expire_legal),
GNUNET_PQ_result_spec_end
};
if (GNUNET_OK !=
GNUNET_PQ_extract_result (result,
rs,
i))
{
GNUNET_break (0);
return;
}
dic->cb (dic->cb_cls,
&exchange_pub,
&meta,
&master_sig);
}
}
/**
* Function called to invoke @a cb on every non-revoked exchange signing key
* that has been signed by the master key. Revoked and (for signing!)
* expired keys are skipped. Runs in its own read-only transaction.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param cb function to call on each signing key
* @param cb_cls closure for @a cb
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
TEH_PG_iterate_active_signkeys (void *cls,
TALER_EXCHANGEDB_ActiveSignkeysCallback cb,
void *cb_cls)
{
struct PostgresClosure *pg = cls;
struct GNUNET_TIME_Absolute now = {0};
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_absolute_time (&now),
GNUNET_PQ_query_param_end
};
struct SignkeysIteratorContext dic = {
.cb = cb,
.cb_cls = cb_cls,
};
PREPARE (pg,
"select_signkeys",
"SELECT"
" master_sig"
",exchange_pub"
",valid_from"
",expire_sign"
",expire_legal"
" FROM exchange_sign_keys esk"
" WHERE"
" expire_sign > $1"
" AND NOT EXISTS "
" (SELECT esk_serial "
" FROM signkey_revocations skr"
" WHERE esk.esk_serial = skr.esk_serial);");
now = GNUNET_TIME_absolute_get ();
return GNUNET_PQ_eval_prepared_multi_select (pg->conn,
"select_signkeys",
params,
&signkeys_cb_helper,
&dic);
}
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