- def generate_rr(self, owner:str, zone: 'Zone') -> 'Any':
- return zone.RR(owner, 'TXT', '"{0}"'.format(self._text))
+ def generate_rr(self):
+ text = escape_TXT(self._text)
+ # split into chunks of max. 255 characters; be careful not to split right after a backslash
+ chunks = re.findall(r'.{0,254}[^\\]', text)
+ assert sum(len(c) for c in chunks) == len (text)
+ chunksep = '"\n' + ' '*20 + '"'
+ chunked = '( "' + chunksep.join(chunks) + '" )'
+ # generate the chunks
+ return RR('@', 'TXT', chunked)
+
+
+class DKIM(TXT): # helper class to treat DKIM more antively
+ class Version:
+ DKIM1 = "DKIM1"
+
+ class Algorithm:
+ RSA = "rsa"
+
+ def __init__(self, selector, version, alg, key):
+ self._selector = check_label(selector)
+ version = check_label(version)
+ alg = check_label(alg)
+ key = check_base64(key)
+ super().__init__("v={0}; k={1}; p={2}".format(version, alg, key))
+
+ def generate_rr(self):
+ return super().generate_rr().relativize('{}._domainkey'.format(self._selector))