Fixed #12362 -- Corrected Python 2.4 incompatibility with hmac constructor in...

import hmac

from django.conf import settings

from django.utils.hashcompat import sha_constructor

from django.utils.hashcompat import sha_hmac

from django.contrib.messages import constants

from django.contrib.messages.storage.base import BaseStorage, Message

from django.utils import simplejson as json

        decoded = super(MessageDecoder, self).decode(s, **kwargs)

        return self.process_messages(decoded)

class CookieStorage(BaseStorage):

    """

    Stores messages in a cookie.

        SECRET_KEY, modified to make it unique for the present purpose.

        """

        key = 'django.contrib.messages' + settings.SECRET_KEY

        return hmac.new(key, value, sha_constructor).hexdigest()

        return hmac.new(key, value, sha_hmac).hexdigest()

    def _encode(self, messages, encode_empty=False):

        """

try:

    import hashlib

    md5_constructor = hashlib.md5

    md5_hmac = md5_constructor

    sha_constructor = hashlib.sha1

    sha_hmac = sha_constructor

except ImportError:

    import md5

    md5_constructor = md5.new

    md5_hmac = md5

    import sha

    sha_constructor = sha.new

    sha_hmac = sha