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# -*- 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)