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Diffstat (limited to 'src/exchangedb/pg_compute_shard.c')
-rw-r--r-- | src/exchangedb/pg_compute_shard.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/src/exchangedb/pg_compute_shard.c b/src/exchangedb/pg_compute_shard.c new file mode 100644 index 000000000..1dea591f1 --- /dev/null +++ b/src/exchangedb/pg_compute_shard.c @@ -0,0 +1,49 @@ +/* + 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_compute_shard.c + * @brief Implementation of the compute_shard 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_compute_shard.h" +#include "pg_helper.h" + + +uint64_t +TEH_PG_compute_shard (const struct TALER_MerchantPublicKeyP *merchant_pub) +{ + uint32_t res; + + GNUNET_assert (GNUNET_YES == + GNUNET_CRYPTO_kdf (&res, + sizeof (res), + merchant_pub, + sizeof (*merchant_pub), + "VOID", + 4, + NULL, 0)); + /* interpret hash result as NBO for platform independence, + convert to HBO and map to [0..2^31-1] range */ + res = ntohl (res); + if (res > INT32_MAX) + res += INT32_MIN; + GNUNET_assert (res <= INT32_MAX); + return (uint64_t) res; +} |