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Edit File: 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 zope.interface import implementer

from twisted.cred import credentials
from twisted.web.iweb import ICredentialFactory

@implementer(ICredentialFactory)
class DigestCredentialFactory:
    """
    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
        )