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author | Christian Grothoff <christian@grothoff.org> | 2021-09-30 15:00:58 +0200 |
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committer | Christian Grothoff <grothoff@gnunet.org> | 2021-10-01 18:37:59 +0200 |
commit | c291d70a2e05409738ae30db468438fffc4e63e2 (patch) | |
tree | 151ebd07e633674cf6aeb4bbd40e2bcf99d55e49 | |
parent | a905a3703ccca00498c02f4fce124ffa9fe06242 (diff) | |
download | anastasis-c291d70a2e05409738ae30db468438fffc4e63e2.tar.gz anastasis-c291d70a2e05409738ae30db468438fffc4e63e2.tar.bz2 anastasis-c291d70a2e05409738ae30db468438fffc4e63e2.zip |
draft DNI validation logic
-rw-r--r-- | src/reducer/validation_ES_DNI.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/src/reducer/validation_ES_DNI.c b/src/reducer/validation_ES_DNI.c new file mode 100644 index 0000000..06bf143 --- /dev/null +++ b/src/reducer/validation_ES_DNI.c @@ -0,0 +1,75 @@ +/* + This file is part of Anastasis + Copyright (C) 2021 Anastasis SARL + + Anastasis is free software; you can redistribute it and/or modify it under the + terms of the GNU Lesser 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 Affero General Public License for more details. + + You should have received a copy of the GNU Affero General Public License along with + Anastasis; see the file COPYING.GPL. If not, see <http://www.gnu.org/licenses/> +*/ +/** + * @file reducer/validation_ES_DNI.c + * @brief validation logic for Spanish Documento Nacional de Identidad numbers, and Número de Identificación de Extranjeros + * @author Christian Grothoff + */ +#include <string.h> +#include <stdbool.h> + + +/** + * Function to validate a Spanish DNI number. + * + * See https://www.ordenacionjuego.es/en/calculo-digito-control + * + * @param dni_number number to validate (input) + * @return true if validation passed, else false + */ +bool +ES_DNI_check (const char *dni_number) +{ + const char map[] = "TRWAGMYFPDXBNJZSQVHLCKE"; + unsigned int num; + char chksum; + unsigned int fact; + char dummy; + + if (strlen (dni_number) < 8) + return false; + switch (dni_number[0]) + { + case 'X': + fact = 0; + dni_number++; + break; + case 'Y': + fact = 10000000; + dni_number++; + break; + case 'Z': + fact = 20000000; + dni_number++; + break; + default: + fact = 0; + /* domestic */ + } + + if (2 != sscanf (dni_number, + "%7u%c%c" + & num, + &chksum, + &dummy)) + return false; + num += fact; + if (map[num % 23] != chksum) + return false; + if (map[num % 23] != chksum) + return false; + return true; +} |