def getKey(self, keyId):
"""Retrieves keys from dht.
Args:
keyId: String or spki.Hash
Returns:
List or None: List of parsed spki.PublicKeys or None if
they didn't parse or none were found.
"""
if isinstance(keyId, spki.Hash):
key = hashToB64(keyId) + '-key'
else:
key = keyId + '-key'
keys = yield self.dht.get(key)
if keys is None:
returnValue(None)
parsedKeys = []
for key in keys:
try:
k = spki.parse(key)
if isinstance(keyId, spki.Hash):
if k.getPrincipal() == keyId:
returnValue(k)
break
else:
parsedKeys.append(k)
except sexp.ParseError:
# ignore invalid data from dht
continue
if parsedKeys != []:
returnValue(parsedKeys)
else:
returnValue(None)
