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Dir : ~/lib/python3/dist-packages/twisted/web/_auth/

View File Name : digest.py

# -*- test-case-name: twisted.web.test.test_httpauth -*-
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.

"""
Implementation of RFC2617: HTTP Digest Authentication

@see: U{http://www.faqs.org/rfcs/rfc2617.html}
"""

from __future__ import division, absolute_import

from zope.interface import implementer
from twisted.cred import credentials
from twisted.web.iweb import ICredentialFactory

@implementer(ICredentialFactory)
class DigestCredentialFactory(object):
    """
    Wrapper for L{digest.DigestCredentialFactory} that implements the
    L{ICredentialFactory} interface.
    """

    scheme = b'digest'

    def __init__(self, algorithm, authenticationRealm):
        """
        Create the digest credential factory that this object wraps.
        """
        self.digest = credentials.DigestCredentialFactory(algorithm,
                                                          authenticationRealm)


    def getChallenge(self, request):
        """
        Generate the challenge for use in the WWW-Authenticate header

        @param request: The L{IRequest} to with access was denied and for the
            response to which this challenge is being generated.

        @return: The L{dict} that can be used to generate a WWW-Authenticate
            header.
        """
        return self.digest.getChallenge(request.getClientAddress().host)


    def decode(self, response, request):
        """
        Create a L{twisted.cred.credentials.DigestedCredentials} object
        from the given response and request.

        @see: L{ICredentialFactory.decode}
        """
        return self.digest.decode(response,
                                  request.method,
                                  request.getClientAddress().host)