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Diffstat (limited to 'src/reducer/validation_NL_BSN.c')
-rw-r--r-- | src/reducer/validation_NL_BSN.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/src/reducer/validation_NL_BSN.c b/src/reducer/validation_NL_BSN.c new file mode 100644 index 0000000..f92bb38 --- /dev/null +++ b/src/reducer/validation_NL_BSN.c @@ -0,0 +1,57 @@ +/* + This file is part of Anastasis + Copyright (C) 2020, 2021 Anastasis SARL + + Anastasis 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. + + Anastasis 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 + Anastasis; see the file COPYING.GPL. If not, see <http://www.gnu.org/licenses/> +*/ +/** + * @file reducer/validation_NL_BSN.c + * @brief Validation for Dutch Buergerservicenummern + * @author Christian Grothoff + */ +#include <string.h> +#include <stdbool.h> + + +/** + * Function to validate a Dutch Social Security number. + * + * See https://nl.wikipedia.org/wiki/Burgerservicenummer + * + * @param bsn_number social security number to validate (input) + * @return true if validation passed, else false + */ +bool +NL_BSN_check (const char *bsn_number) +{ + static const int factors[] = { + 9, 8, 7, 6, 5, 4, 3, 2, -1 + }; + unsigned int sum = 0; + + if (strlen (bsn_number) != 9) + return false; + for (unsigned int i = 0; i<8; i++) + { + unsigned char c = (unsigned char) bsn_number[i]; + + if ( ('0' > c) || ('9' < c) ) + return false; + sum += (c - '0') * factors[i]; + } + { + unsigned char c = (unsigned char) bsn_number[8]; + unsigned int v = (c - '0'); + + return (sum % 11 == v); + } +} |