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| author | Kevin Dagostino <kevin@tonkworks.com> | 2023-12-15 18:59:26 +0100 |
|---|---|---|
| committer | Arthur de Jong <arthur@arthurdejong.org> | 2024-02-25 17:31:24 +0100 |
| commit | 9c7c669ece1491e7fd697f2184ad9b7185be59b2 (patch) | |
| tree | 31bab155348b3ab6df070cb6fd828cf068a106d6 /stdnum/fr | |
| parent | 1e412ee066afaa0861b4885604aa6106a3c4c879 (diff) | |
Imporve French NIF validation (checksum)
The last 3 digits are a checksum. % 511
https://ec.europa.eu/taxation_customs/tin/specs/FS-TIN%20Algorithms-Public.docx
Closes https://github.com/arthurdejong/python-stdnum/pull/426
Diffstat (limited to 'stdnum/fr')
| -rw-r--r-- | stdnum/fr/nif.py | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/stdnum/fr/nif.py b/stdnum/fr/nif.py index 4d57e4e..d043674 100644 --- a/stdnum/fr/nif.py +++ b/stdnum/fr/nif.py @@ -30,8 +30,12 @@ More information: * https://ec.europa.eu/taxation_customs/tin/tinByCountry.html * https://fr.wikipedia.org/wiki/Numéro_d%27Immatriculation_Fiscale#France ->>> validate('0701987765432') -'0701987765432' +>>> validate('3023217600053') +'3023217600053' +>>> validate('3023217600054') +Traceback (most recent call last): + ... +InvalidChecksum: ... >>> validate('070198776543') Traceback (most recent call last): ... @@ -40,8 +44,8 @@ InvalidLength: ... Traceback (most recent call last): ... InvalidComponent: ... ->>> format('0701987765432') -'07 01 987 765 432' +>>> format('3023217600053') +'30 23 217 600 053' """ from stdnum.exceptions import * @@ -54,6 +58,11 @@ def compact(number): return clean(number, ' ').strip() +def calc_check_digits(number): + """Calculate the check digits for the number.""" + return '%03d' % (int(number[:10]) % 511) + + def validate(number): """Check if the number provided is a valid NIF.""" number = compact(number) @@ -63,6 +72,8 @@ def validate(number): raise InvalidComponent() if len(number) != 13: raise InvalidLength() + if calc_check_digits(number) != number[-3:]: + raise InvalidChecksum() return number |