979 lines
25 KiB
C
979 lines
25 KiB
C
/*
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This file is part of TALER
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Copyright (C) 2014-2022 Taler Systems SA
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TALER is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3, or (at your option) any later version.
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TALER is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
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*/
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/**
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* @file pq/pq_result_helper.c
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* @brief functions to initialize parameter arrays
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* @author Christian Grothoff
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*/
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#include "platform.h"
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#include <gnunet/gnunet_util_lib.h>
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#include "taler_pq_lib.h"
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/**
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* Extract a currency amount from a query result according to the
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* given specification.
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*
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* @param result the result to extract the amount from
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* @param row which row of the result to extract the amount from (needed as results can have multiple rows)
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* @param currency currency to use for @a r_amount_nbo
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* @param val_name name of the column with the amount's "value", must include the substring "_val".
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* @param frac_name name of the column with the amount's "fractional" value, must include the substring "_frac".
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* @param[out] r_amount_nbo where to store the amount, in network byte order
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* @return
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* #GNUNET_YES if all results could be extracted
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* #GNUNET_NO if at least one result was NULL
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* #GNUNET_SYSERR if a result was invalid (non-existing field)
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*/
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static enum GNUNET_GenericReturnValue
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extract_amount_nbo_helper (PGresult *result,
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int row,
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const char *currency,
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const char *val_name,
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const char *frac_name,
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struct TALER_AmountNBO *r_amount_nbo)
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{
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int val_num;
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int frac_num;
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int len;
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/* These checks are simply to check that clients obey by our naming
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conventions, and not for any functional reason */
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GNUNET_assert (NULL !=
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strstr (val_name,
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"_val"));
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GNUNET_assert (NULL !=
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strstr (frac_name,
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"_frac"));
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/* Set return value to invalid in case we don't finish */
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memset (r_amount_nbo,
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0,
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sizeof (struct TALER_AmountNBO));
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val_num = PQfnumber (result,
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val_name);
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frac_num = PQfnumber (result,
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frac_name);
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if (val_num < 0)
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{
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GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
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"Field `%s' does not exist in result\n",
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val_name);
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return GNUNET_SYSERR;
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}
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if (frac_num < 0)
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{
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GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
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"Field `%s' does not exist in result\n",
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frac_name);
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return GNUNET_SYSERR;
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}
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if ( (PQgetisnull (result,
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row,
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val_num)) ||
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(PQgetisnull (result,
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row,
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frac_num)) )
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{
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return GNUNET_NO;
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}
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/* Note that Postgres stores value in NBO internally,
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so no conversion needed in this case */
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r_amount_nbo->value = *(uint64_t *) PQgetvalue (result,
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row,
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val_num);
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r_amount_nbo->fraction = *(uint32_t *) PQgetvalue (result,
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row,
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frac_num);
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if (GNUNET_ntohll (r_amount_nbo->value) >= TALER_AMOUNT_MAX_VALUE)
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{
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GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
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"Field `%s' exceeds legal range\n",
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val_name);
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return GNUNET_SYSERR;
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}
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if (ntohl (r_amount_nbo->fraction) >= TALER_AMOUNT_FRAC_BASE)
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{
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GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
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"Field `%s' exceeds legal range\n",
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frac_name);
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return GNUNET_SYSERR;
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}
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len = GNUNET_MIN (TALER_CURRENCY_LEN - 1,
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strlen (currency));
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memcpy (r_amount_nbo->currency,
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currency,
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len);
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return GNUNET_OK;
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}
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/**
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* Extract data from a Postgres database @a result at row @a row.
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*
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* @param cls closure, a `const char *` giving the currency
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* @param result where to extract data from
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* @param row row to extract data from
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* @param fname name (or prefix) of the fields to extract from
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* @param[in,out] dst_size where to store size of result, may be NULL
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* @param[out] dst where to store the result
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* @return
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* #GNUNET_YES if all results could be extracted
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* #GNUNET_NO if at least one result was NULL
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* #GNUNET_SYSERR if a result was invalid (non-existing field)
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*/
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static enum GNUNET_GenericReturnValue
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extract_amount_nbo (void *cls,
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PGresult *result,
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int row,
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const char *fname,
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size_t *dst_size,
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void *dst)
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{
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const char *currency = cls;
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char *val_name;
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char *frac_name;
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enum GNUNET_GenericReturnValue ret;
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if (sizeof (struct TALER_AmountNBO) != *dst_size)
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{
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GNUNET_break (0);
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return GNUNET_SYSERR;
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}
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GNUNET_asprintf (&val_name,
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"%s_val",
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fname);
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GNUNET_asprintf (&frac_name,
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"%s_frac",
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fname);
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ret = extract_amount_nbo_helper (result,
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row,
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currency,
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val_name,
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frac_name,
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dst);
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GNUNET_free (val_name);
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GNUNET_free (frac_name);
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return ret;
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}
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struct GNUNET_PQ_ResultSpec
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TALER_PQ_result_spec_amount_nbo (const char *name,
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const char *currency,
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struct TALER_AmountNBO *amount)
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{
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struct GNUNET_PQ_ResultSpec res = {
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.conv = &extract_amount_nbo,
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.cls = (void *) currency,
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.dst = (void *) amount,
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.dst_size = sizeof (*amount),
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.fname = name
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};
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return res;
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}
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/**
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* Extract data from a Postgres database @a result at row @a row.
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*
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* @param cls closure, a `const char *` giving the currency
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* @param result where to extract data from
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* @param row row to extract data from
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* @param fname name (or prefix) of the fields to extract from
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* @param[in,out] dst_size where to store size of result, may be NULL
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* @param[out] dst where to store the result
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* @return
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* #GNUNET_YES if all results could be extracted
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* #GNUNET_NO if at least one result was NULL
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* #GNUNET_SYSERR if a result was invalid (non-existing field)
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*/
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static enum GNUNET_GenericReturnValue
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extract_amount (void *cls,
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PGresult *result,
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int row,
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const char *fname,
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size_t *dst_size,
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void *dst)
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{
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const char *currency = cls;
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struct TALER_Amount *r_amount = dst;
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char *val_name;
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char *frac_name;
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struct TALER_AmountNBO amount_nbo;
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enum GNUNET_GenericReturnValue ret;
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if (sizeof (struct TALER_AmountNBO) != *dst_size)
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{
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GNUNET_break (0);
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return GNUNET_SYSERR;
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}
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GNUNET_asprintf (&val_name,
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"%s_val",
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fname);
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GNUNET_asprintf (&frac_name,
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"%s_frac",
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fname);
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ret = extract_amount_nbo_helper (result,
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row,
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currency,
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val_name,
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frac_name,
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&amount_nbo);
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if (GNUNET_OK == ret)
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TALER_amount_ntoh (r_amount,
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&amount_nbo);
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else
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memset (r_amount,
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0,
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sizeof (struct TALER_Amount));
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GNUNET_free (val_name);
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GNUNET_free (frac_name);
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return ret;
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}
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struct GNUNET_PQ_ResultSpec
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TALER_PQ_result_spec_amount (const char *name,
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const char *currency,
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struct TALER_Amount *amount)
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{
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struct GNUNET_PQ_ResultSpec res = {
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.conv = &extract_amount,
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.cls = (void *) currency,
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.dst = (void *) amount,
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.dst_size = sizeof (*amount),
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.fname = name
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};
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return res;
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}
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/**
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* Extract data from a Postgres database @a result at row @a row.
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*
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* @param cls closure
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* @param result where to extract data from
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* @param row row to extract data from
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* @param fname name (or prefix) of the fields to extract from
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* @param[in,out] dst_size where to store size of result, may be NULL
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* @param[out] dst where to store the result
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* @return
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* #GNUNET_YES if all results could be extracted
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* #GNUNET_NO if at least one result was NULL
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* #GNUNET_SYSERR if a result was invalid (non-existing field)
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*/
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static enum GNUNET_GenericReturnValue
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extract_json (void *cls,
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PGresult *result,
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int row,
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const char *fname,
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size_t *dst_size,
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void *dst)
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{
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json_t **j_dst = dst;
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const char *res;
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int fnum;
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json_error_t json_error;
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size_t slen;
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(void) cls;
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(void) dst_size;
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fnum = PQfnumber (result,
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fname);
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if (fnum < 0)
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{
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GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
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"Field `%s' does not exist in result\n",
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fname);
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return GNUNET_SYSERR;
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}
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if (PQgetisnull (result,
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row,
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fnum))
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return GNUNET_NO;
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slen = PQgetlength (result,
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row,
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fnum);
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res = (const char *) PQgetvalue (result,
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row,
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fnum);
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*j_dst = json_loadb (res,
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slen,
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JSON_REJECT_DUPLICATES,
|
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&json_error);
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if (NULL == *j_dst)
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{
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GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
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"Failed to parse JSON result for field `%s': %s (%s)\n",
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fname,
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json_error.text,
|
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json_error.source);
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return GNUNET_SYSERR;
|
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}
|
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return GNUNET_OK;
|
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}
|
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|
|
|
|
/**
|
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* Function called to clean up memory allocated
|
|
* by a #GNUNET_PQ_ResultConverter.
|
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*
|
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* @param cls closure
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* @param rd result data to clean up
|
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*/
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static void
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clean_json (void *cls,
|
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void *rd)
|
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{
|
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json_t **dst = rd;
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|
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(void) cls;
|
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if (NULL != *dst)
|
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{
|
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json_decref (*dst);
|
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*dst = NULL;
|
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}
|
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}
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struct GNUNET_PQ_ResultSpec
|
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TALER_PQ_result_spec_json (const char *name,
|
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json_t **jp)
|
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{
|
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struct GNUNET_PQ_ResultSpec res = {
|
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.conv = &extract_json,
|
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.cleaner = &clean_json,
|
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.dst = (void *) jp,
|
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.fname = name
|
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};
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|
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return res;
|
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}
|
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|
|
|
|
/**
|
|
* Extract data from a Postgres database @a result at row @a row.
|
|
*
|
|
* @param cls closure
|
|
* @param result where to extract data from
|
|
* @param row the row to extract data from
|
|
* @param fname name (or prefix) of the fields to extract from
|
|
* @param[in,out] dst_size where to store size of result, may be NULL
|
|
* @param[out] dst where to store the result
|
|
* @return
|
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* #GNUNET_YES if all results could be extracted
|
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* #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
|
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*/
|
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static enum GNUNET_GenericReturnValue
|
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extract_denom_pub (void *cls,
|
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PGresult *result,
|
|
int row,
|
|
const char *fname,
|
|
size_t *dst_size,
|
|
void *dst)
|
|
{
|
|
struct TALER_DenominationPublicKey *pk = dst;
|
|
size_t len;
|
|
const char *res;
|
|
int fnum;
|
|
uint32_t be[2];
|
|
|
|
(void) cls;
|
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(void) dst_size;
|
|
fnum = PQfnumber (result,
|
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fname);
|
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if (fnum < 0)
|
|
{
|
|
GNUNET_break (0);
|
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return GNUNET_SYSERR;
|
|
}
|
|
if (PQgetisnull (result,
|
|
row,
|
|
fnum))
|
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return GNUNET_NO;
|
|
|
|
/* if a field is null, continue but
|
|
* remember that we now return a different result */
|
|
len = PQgetlength (result,
|
|
row,
|
|
fnum);
|
|
res = PQgetvalue (result,
|
|
row,
|
|
fnum);
|
|
if (len < sizeof (be))
|
|
{
|
|
GNUNET_break (0);
|
|
return GNUNET_SYSERR;
|
|
}
|
|
memcpy (be,
|
|
res,
|
|
sizeof (be));
|
|
res += sizeof (be);
|
|
len -= sizeof (be);
|
|
pk->cipher = ntohl (be[0]);
|
|
pk->age_mask.bits = ntohl (be[1]);
|
|
switch (pk->cipher)
|
|
{
|
|
case TALER_DENOMINATION_RSA:
|
|
pk->details.rsa_public_key
|
|
= GNUNET_CRYPTO_rsa_public_key_decode (res,
|
|
len);
|
|
if (NULL == pk->details.rsa_public_key)
|
|
{
|
|
GNUNET_break (0);
|
|
return GNUNET_SYSERR;
|
|
}
|
|
return GNUNET_OK;
|
|
case TALER_DENOMINATION_CS:
|
|
if (sizeof (pk->details.cs_public_key) != len)
|
|
{
|
|
GNUNET_break (0);
|
|
return GNUNET_SYSERR;
|
|
}
|
|
memcpy (&pk->details.cs_public_key,
|
|
res,
|
|
len);
|
|
return GNUNET_OK;
|
|
default:
|
|
GNUNET_break (0);
|
|
}
|
|
return GNUNET_SYSERR;
|
|
}
|
|
|
|
|
|
/**
|
|
* Function called to clean up memory allocated
|
|
* by a #GNUNET_PQ_ResultConverter.
|
|
*
|
|
* @param cls closure
|
|
* @param rd result data to clean up
|
|
*/
|
|
static void
|
|
clean_denom_pub (void *cls,
|
|
void *rd)
|
|
{
|
|
struct TALER_DenominationPublicKey *denom_pub = rd;
|
|
|
|
(void) cls;
|
|
TALER_denom_pub_free (denom_pub);
|
|
}
|
|
|
|
|
|
struct GNUNET_PQ_ResultSpec
|
|
TALER_PQ_result_spec_denom_pub (const char *name,
|
|
struct TALER_DenominationPublicKey *denom_pub)
|
|
{
|
|
struct GNUNET_PQ_ResultSpec res = {
|
|
.conv = &extract_denom_pub,
|
|
.cleaner = &clean_denom_pub,
|
|
.dst = (void *) denom_pub,
|
|
.fname = name
|
|
};
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
/**
|
|
* Extract data from a Postgres database @a result at row @a row.
|
|
*
|
|
* @param cls closure
|
|
* @param result where to extract data from
|
|
* @param row the row to extract data from
|
|
* @param fname name (or prefix) of the fields to extract from
|
|
* @param[in,out] dst_size where to store size of result, may be NULL
|
|
* @param[out] dst where to store the result
|
|
* @return
|
|
* #GNUNET_YES if all results could be extracted
|
|
* #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
|
|
*/
|
|
static enum GNUNET_GenericReturnValue
|
|
extract_denom_sig (void *cls,
|
|
PGresult *result,
|
|
int row,
|
|
const char *fname,
|
|
size_t *dst_size,
|
|
void *dst)
|
|
{
|
|
struct TALER_DenominationSignature *sig = dst;
|
|
size_t len;
|
|
const char *res;
|
|
int fnum;
|
|
uint32_t be[2];
|
|
|
|
(void) cls;
|
|
(void) dst_size;
|
|
fnum = PQfnumber (result,
|
|
fname);
|
|
if (fnum < 0)
|
|
{
|
|
GNUNET_break (0);
|
|
return GNUNET_SYSERR;
|
|
}
|
|
if (PQgetisnull (result,
|
|
row,
|
|
fnum))
|
|
return GNUNET_NO;
|
|
|
|
/* if a field is null, continue but
|
|
* remember that we now return a different result */
|
|
len = PQgetlength (result,
|
|
row,
|
|
fnum);
|
|
res = PQgetvalue (result,
|
|
row,
|
|
fnum);
|
|
if (len < sizeof (be))
|
|
{
|
|
GNUNET_break (0);
|
|
return GNUNET_SYSERR;
|
|
}
|
|
memcpy (&be,
|
|
res,
|
|
sizeof (be));
|
|
if (0x00 != ntohl (be[1]))
|
|
{
|
|
GNUNET_break (0);
|
|
return GNUNET_SYSERR;
|
|
}
|
|
res += sizeof (be);
|
|
len -= sizeof (be);
|
|
sig->cipher = ntohl (be[0]);
|
|
switch (sig->cipher)
|
|
{
|
|
case TALER_DENOMINATION_RSA:
|
|
sig->details.rsa_signature
|
|
= GNUNET_CRYPTO_rsa_signature_decode (res,
|
|
len);
|
|
if (NULL == sig->details.rsa_signature)
|
|
{
|
|
GNUNET_break (0);
|
|
return GNUNET_SYSERR;
|
|
}
|
|
return GNUNET_OK;
|
|
case TALER_DENOMINATION_CS:
|
|
if (sizeof (sig->details.cs_signature) != len)
|
|
{
|
|
GNUNET_break (0);
|
|
return GNUNET_SYSERR;
|
|
}
|
|
memcpy (&sig->details.cs_signature,
|
|
res,
|
|
len);
|
|
return GNUNET_OK;
|
|
default:
|
|
GNUNET_break (0);
|
|
}
|
|
return GNUNET_SYSERR;
|
|
}
|
|
|
|
|
|
/**
|
|
* Function called to clean up memory allocated
|
|
* by a #GNUNET_PQ_ResultConverter.
|
|
*
|
|
* @param cls closure
|
|
* @param rd result data to clean up
|
|
*/
|
|
static void
|
|
clean_denom_sig (void *cls,
|
|
void *rd)
|
|
{
|
|
struct TALER_DenominationSignature *denom_sig = rd;
|
|
|
|
(void) cls;
|
|
TALER_denom_sig_free (denom_sig);
|
|
}
|
|
|
|
|
|
struct GNUNET_PQ_ResultSpec
|
|
TALER_PQ_result_spec_denom_sig (const char *name,
|
|
struct TALER_DenominationSignature *denom_sig)
|
|
{
|
|
struct GNUNET_PQ_ResultSpec res = {
|
|
.conv = &extract_denom_sig,
|
|
.cleaner = &clean_denom_sig,
|
|
.dst = (void *) denom_sig,
|
|
.fname = name
|
|
};
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
/**
|
|
* Extract data from a Postgres database @a result at row @a row.
|
|
*
|
|
* @param cls closure
|
|
* @param result where to extract data from
|
|
* @param row the row to extract data from
|
|
* @param fname name (or prefix) of the fields to extract from
|
|
* @param[in,out] dst_size where to store size of result, may be NULL
|
|
* @param[out] dst where to store the result
|
|
* @return
|
|
* #GNUNET_YES if all results could be extracted
|
|
* #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
|
|
*/
|
|
static enum GNUNET_GenericReturnValue
|
|
extract_blinded_denom_sig (void *cls,
|
|
PGresult *result,
|
|
int row,
|
|
const char *fname,
|
|
size_t *dst_size,
|
|
void *dst)
|
|
{
|
|
struct TALER_BlindedDenominationSignature *sig = dst;
|
|
size_t len;
|
|
const char *res;
|
|
int fnum;
|
|
uint32_t be[2];
|
|
|
|
(void) cls;
|
|
(void) dst_size;
|
|
fnum = PQfnumber (result,
|
|
fname);
|
|
if (fnum < 0)
|
|
{
|
|
GNUNET_break (0);
|
|
return GNUNET_SYSERR;
|
|
}
|
|
if (PQgetisnull (result,
|
|
row,
|
|
fnum))
|
|
return GNUNET_NO;
|
|
|
|
/* if a field is null, continue but
|
|
* remember that we now return a different result */
|
|
len = PQgetlength (result,
|
|
row,
|
|
fnum);
|
|
res = PQgetvalue (result,
|
|
row,
|
|
fnum);
|
|
if (len < sizeof (be))
|
|
{
|
|
GNUNET_break (0);
|
|
return GNUNET_SYSERR;
|
|
}
|
|
memcpy (&be,
|
|
res,
|
|
sizeof (be));
|
|
if (0x01 != ntohl (be[1])) /* magic marker: blinded */
|
|
{
|
|
GNUNET_break (0);
|
|
return GNUNET_SYSERR;
|
|
}
|
|
res += sizeof (be);
|
|
len -= sizeof (be);
|
|
sig->cipher = ntohl (be[0]);
|
|
switch (sig->cipher)
|
|
{
|
|
case TALER_DENOMINATION_RSA:
|
|
sig->details.blinded_rsa_signature
|
|
= GNUNET_CRYPTO_rsa_signature_decode (res,
|
|
len);
|
|
if (NULL == sig->details.blinded_rsa_signature)
|
|
{
|
|
GNUNET_break (0);
|
|
return GNUNET_SYSERR;
|
|
}
|
|
return GNUNET_OK;
|
|
case TALER_DENOMINATION_CS:
|
|
if (sizeof (sig->details.blinded_cs_answer) != len)
|
|
{
|
|
GNUNET_break (0);
|
|
return GNUNET_SYSERR;
|
|
}
|
|
memcpy (&sig->details.blinded_cs_answer,
|
|
res,
|
|
len);
|
|
return GNUNET_OK;
|
|
default:
|
|
GNUNET_break (0);
|
|
}
|
|
return GNUNET_SYSERR;
|
|
}
|
|
|
|
|
|
/**
|
|
* Function called to clean up memory allocated
|
|
* by a #GNUNET_PQ_ResultConverter.
|
|
*
|
|
* @param cls closure
|
|
* @param rd result data to clean up
|
|
*/
|
|
static void
|
|
clean_blinded_denom_sig (void *cls,
|
|
void *rd)
|
|
{
|
|
struct TALER_BlindedDenominationSignature *denom_sig = rd;
|
|
|
|
(void) cls;
|
|
TALER_blinded_denom_sig_free (denom_sig);
|
|
}
|
|
|
|
|
|
struct GNUNET_PQ_ResultSpec
|
|
TALER_PQ_result_spec_blinded_denom_sig (
|
|
const char *name,
|
|
struct TALER_BlindedDenominationSignature *denom_sig)
|
|
{
|
|
struct GNUNET_PQ_ResultSpec res = {
|
|
.conv = &extract_blinded_denom_sig,
|
|
.cleaner = &clean_blinded_denom_sig,
|
|
.dst = (void *) denom_sig,
|
|
.fname = name
|
|
};
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
/**
|
|
* Extract data from a Postgres database @a result at row @a row.
|
|
*
|
|
* @param cls closure
|
|
* @param result where to extract data from
|
|
* @param row the row to extract data from
|
|
* @param fname name (or prefix) of the fields to extract from
|
|
* @param[in,out] dst_size where to store size of result, may be NULL
|
|
* @param[out] dst where to store the result
|
|
* @return
|
|
* #GNUNET_YES if all results could be extracted
|
|
* #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
|
|
*/
|
|
static enum GNUNET_GenericReturnValue
|
|
extract_blinded_planchet (void *cls,
|
|
PGresult *result,
|
|
int row,
|
|
const char *fname,
|
|
size_t *dst_size,
|
|
void *dst)
|
|
{
|
|
struct TALER_BlindedPlanchet *bp = dst;
|
|
size_t len;
|
|
const char *res;
|
|
int fnum;
|
|
uint32_t be[2];
|
|
|
|
(void) cls;
|
|
(void) dst_size;
|
|
fnum = PQfnumber (result,
|
|
fname);
|
|
if (fnum < 0)
|
|
{
|
|
GNUNET_break (0);
|
|
return GNUNET_SYSERR;
|
|
}
|
|
if (PQgetisnull (result,
|
|
row,
|
|
fnum))
|
|
return GNUNET_NO;
|
|
|
|
/* if a field is null, continue but
|
|
* remember that we now return a different result */
|
|
len = PQgetlength (result,
|
|
row,
|
|
fnum);
|
|
res = PQgetvalue (result,
|
|
row,
|
|
fnum);
|
|
if (len < sizeof (be))
|
|
{
|
|
GNUNET_break (0);
|
|
return GNUNET_SYSERR;
|
|
}
|
|
memcpy (&be,
|
|
res,
|
|
sizeof (be));
|
|
if (0x0100 != ntohl (be[1])) /* magic marker: blinded */
|
|
{
|
|
GNUNET_break (0);
|
|
return GNUNET_SYSERR;
|
|
}
|
|
res += sizeof (be);
|
|
len -= sizeof (be);
|
|
bp->cipher = ntohl (be[0]);
|
|
switch (bp->cipher)
|
|
{
|
|
case TALER_DENOMINATION_RSA:
|
|
bp->details.rsa_blinded_planchet.blinded_msg_size
|
|
= len;
|
|
bp->details.rsa_blinded_planchet.blinded_msg
|
|
= GNUNET_memdup (res,
|
|
len);
|
|
return GNUNET_OK;
|
|
case TALER_DENOMINATION_CS:
|
|
if (sizeof (bp->details.cs_blinded_planchet) != len)
|
|
{
|
|
GNUNET_break (0);
|
|
return GNUNET_SYSERR;
|
|
}
|
|
memcpy (&bp->details.cs_blinded_planchet,
|
|
res,
|
|
len);
|
|
return GNUNET_OK;
|
|
default:
|
|
GNUNET_break (0);
|
|
}
|
|
return GNUNET_SYSERR;
|
|
}
|
|
|
|
|
|
/**
|
|
* Function called to clean up memory allocated
|
|
* by a #GNUNET_PQ_ResultConverter.
|
|
*
|
|
* @param cls closure
|
|
* @param rd result data to clean up
|
|
*/
|
|
static void
|
|
clean_blinded_planchet (void *cls,
|
|
void *rd)
|
|
{
|
|
struct TALER_BlindedPlanchet *bp = rd;
|
|
|
|
(void) cls;
|
|
TALER_blinded_planchet_free (bp);
|
|
}
|
|
|
|
|
|
struct GNUNET_PQ_ResultSpec
|
|
TALER_PQ_result_spec_blinded_planchet (
|
|
const char *name,
|
|
struct TALER_BlindedPlanchet *bp)
|
|
{
|
|
struct GNUNET_PQ_ResultSpec res = {
|
|
.conv = &extract_blinded_planchet,
|
|
.cleaner = &clean_blinded_planchet,
|
|
.dst = (void *) bp,
|
|
.fname = name
|
|
};
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
/**
|
|
* Extract data from a Postgres database @a result at row @a row.
|
|
*
|
|
* @param cls closure
|
|
* @param result where to extract data from
|
|
* @param row row to extract data from
|
|
* @param fname name (or prefix) of the fields to extract from
|
|
* @param[in,out] dst_size where to store size of result, may be NULL
|
|
* @param[out] dst where to store the result
|
|
* @return
|
|
* #GNUNET_YES if all results could be extracted
|
|
* #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
|
|
*/
|
|
static enum GNUNET_GenericReturnValue
|
|
extract_exchange_withdraw_values (void *cls,
|
|
PGresult *result,
|
|
int row,
|
|
const char *fname,
|
|
size_t *dst_size,
|
|
void *dst)
|
|
{
|
|
struct TALER_ExchangeWithdrawValues *alg_values = dst;
|
|
size_t len;
|
|
const char *res;
|
|
int fnum;
|
|
uint32_t be[2];
|
|
|
|
(void) cls;
|
|
(void) dst_size;
|
|
fnum = PQfnumber (result,
|
|
fname);
|
|
if (fnum < 0)
|
|
{
|
|
GNUNET_break (0);
|
|
return GNUNET_SYSERR;
|
|
}
|
|
if (PQgetisnull (result,
|
|
row,
|
|
fnum))
|
|
return GNUNET_NO;
|
|
|
|
/* if a field is null, continue but
|
|
* remember that we now return a different result */
|
|
len = PQgetlength (result,
|
|
row,
|
|
fnum);
|
|
res = PQgetvalue (result,
|
|
row,
|
|
fnum);
|
|
if (len < sizeof (be))
|
|
{
|
|
GNUNET_break (0);
|
|
return GNUNET_SYSERR;
|
|
}
|
|
memcpy (&be,
|
|
res,
|
|
sizeof (be));
|
|
if (0x010000 != ntohl (be[1])) /* magic marker: EWV */
|
|
{
|
|
GNUNET_break (0);
|
|
return GNUNET_SYSERR;
|
|
}
|
|
res += sizeof (be);
|
|
len -= sizeof (be);
|
|
alg_values->cipher = ntohl (be[0]);
|
|
switch (alg_values->cipher)
|
|
{
|
|
case TALER_DENOMINATION_RSA:
|
|
if (0 != len)
|
|
{
|
|
GNUNET_break (0);
|
|
return GNUNET_SYSERR;
|
|
}
|
|
return GNUNET_OK;
|
|
case TALER_DENOMINATION_CS:
|
|
if (sizeof (struct TALER_DenominationCSPublicRPairP) != len)
|
|
{
|
|
GNUNET_break (0);
|
|
return GNUNET_SYSERR;
|
|
}
|
|
memcpy (&alg_values->details.cs_values,
|
|
res,
|
|
len);
|
|
return GNUNET_OK;
|
|
default:
|
|
GNUNET_break (0);
|
|
}
|
|
return GNUNET_SYSERR;
|
|
}
|
|
|
|
|
|
struct GNUNET_PQ_ResultSpec
|
|
TALER_PQ_result_spec_exchange_withdraw_values (
|
|
const char *name,
|
|
struct TALER_ExchangeWithdrawValues *ewv)
|
|
{
|
|
struct GNUNET_PQ_ResultSpec res = {
|
|
.conv = &extract_exchange_withdraw_values,
|
|
.dst = (void *) ewv,
|
|
.fname = name
|
|
};
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
/* end of pq_result_helper.c */
|