in cassandra_sigv4/auth.py [0:0]
def _extract_nonce(challenge):
try:
nonce_start = challenge.index(_NONCE_KEY) + len(_NONCE_KEY)
nonce_end = nonce_start + _NONCE_LENGTH
except Exception as e:
raise ValueError("Couldn't extract nonce from challenge, {0}".format(e))
return challenge[nonce_start:nonce_end]