42 lines
1.4 KiB
Python
42 lines
1.4 KiB
Python
import logging
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from django.core.exceptions import ImproperlyConfigured
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from django.utils.encoding import force_bytes
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from django.contrib.auth.hashers import BasePasswordHasher
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import kerberos
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from . import app_settings
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class KerberosHasher(BasePasswordHasher):
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'''A pseudo hasher which just validate that the given password
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match a given Kerberos identity'''
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algorithm = 'kerberos'
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def default_realm(self):
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'''Default realm for usernames without a realm'''
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return app_settings.DEFAULT_REALM
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def service_principal(self):
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if not app_settings.SERVICE_PRINCIPAL:
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raise ImproperlyConfigured('Kerberos pseudo password hasher needs '
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'the setting KERBEROS_SERVICE_PRINCIPAL to be '
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'set')
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return app_settings.SERVICE_PRINCIPAL
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def verify(self, password, encoded):
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algorithm, principal = encoded.split('$', 2)
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assert algorithm == self.algorithm
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principal = force_bytes(principal)
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password = force_bytes(password)
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try:
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return kerberos.checkPassword(principal, password,
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self.service_principal(), self.default_realm())
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except kerberos.KrbError, e:
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logging.getLogger(__name__).error('password validation'
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'for principal %r failed %s', principal, e)
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return False
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