  
  
  def salted_hmac(key_salt, value, secret=None):
      """
      Return the HMAC-SHA1 of 'value', using a key generated from key_salt and a
      secret (which defaults to settings.SECRET_KEY).
  
      A different key_salt should be passed in for every application of HMAC.
      """
      if secret is None:
          secret = settings.SECRET_KEY
 
</s> remove def salted_hmac(key_salt, value, secret=None):
 </s> add class InvalidAlgorithm(ValueError):
    """Algorithm is not supported by hashlib."""
    pass


def salted_hmac(key_salt, value, secret=None, *, algorithm='sha1'): </s> remove 
 </s> add     try:
        hasher = getattr(hashlib, algorithm)
    except AttributeError as e:
        raise InvalidAlgorithm(
            '%r is not an algorithm accepted by the hashlib module.'
            % algorithm
        ) from e </s> remove     # passing the key_salt and our base key through a pseudo-random function and
    # SHA1 works nicely.
    key = hashlib.sha1(key_salt + secret).digest()
 </s> add     # passing the key_salt and our base key through a pseudo-random function.
    key = hasher(key_salt + secret).digest() </s> remove     return hmac.new(key, msg=force_bytes(value), digestmod=hashlib.sha1)
 </s> add     return hmac.new(key, msg=force_bytes(value), digestmod=hasher)
    Return the HMAC of 'value', using a key generated from key_salt and a
    secret (which defaults to settings.SECRET_KEY). Default algorithm is SHA1,
    but any algorithm name supported by hashlib.new() can be passed.
  
  
  def salted_hmac(key_salt, value, secret=None):
      """
    Return the HMAC of 'value', using a key generated from key_salt and a
    secret (which defaults to settings.SECRET_KEY). Default algorithm is SHA1,
    but any algorithm name supported by hashlib.new() can be passed.
    Return the HMAC of 'value', using a key generated from key_salt and a
    secret (which defaults to settings.SECRET_KEY). Default algorithm is SHA1,
    but any algorithm name supported by hashlib.new() can be passed.
  
      A different key_salt should be passed in for every application of HMAC.
      """
      if secret is None:
          secret = settings.SECRET_KEY
keep keep keep keep replace replace keep keep keep keep keep
 Refs #27468 -- Added algorithm parameter to django.utils.crypto.salted_hmac(). 
django/utils/crypto.py