50 lines
1.7 KiB
C
50 lines
1.7 KiB
C
/*
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This file is part of TALER
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Copyright (C) 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 exchangedb/pg_compute_shard.c
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* @brief Implementation of the compute_shard function for Postgres
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* @author Christian Grothoff
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*/
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#include "platform.h"
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#include "taler_error_codes.h"
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#include "taler_dbevents.h"
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#include "taler_pq_lib.h"
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#include "pg_compute_shard.h"
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#include "pg_helper.h"
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uint64_t
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TEH_PG_compute_shard (const struct TALER_MerchantPublicKeyP *merchant_pub)
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{
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uint32_t res;
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GNUNET_assert (GNUNET_YES ==
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GNUNET_CRYPTO_kdf (&res,
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sizeof (res),
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merchant_pub,
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sizeof (*merchant_pub),
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"VOID",
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4,
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NULL, 0));
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/* interpret hash result as NBO for platform independence,
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convert to HBO and map to [0..2^31-1] range */
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res = ntohl (res);
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if (res > INT32_MAX)
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res += INT32_MIN;
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GNUNET_assert (res <= INT32_MAX);
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return (uint64_t) res;
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}
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