def _generate_signature()

in cassandra_sigv4/auth.py [0:0]

• 12 lines of code
• 1 McCabe index (conditional complexity)

def _generate_signature(nonce, request_timestamp, credentials, region):
    credentials_scope_date = _format_datestamp(request_timestamp)
    signing_scope = _generate_scope(credentials_scope_date, region)
    canonical_request = _generate_canonical_request(credentials.access_key, signing_scope,
                                                    request_timestamp, nonce)

    string_to_sign = "{0}\n{1}\n{2}\n{3}".format(_AWS4_SIGNING_ALGORITHM,
                                                 _format_timestamp(request_timestamp),
                                                 signing_scope,
                                                 _sha_256_hash(canonical_request))

    signing_key = _generate_signing_key(credentials.secret_key, credentials_scope_date, region,
                                        _CANONICAL_SERVICE)

    return _sha_256_hmac(signing_key, string_to_sign, hex_result=True)