sqlmapproject/sqlmap · error · OperationalError

invalid MonetDB challenge

Error message

invalid MonetDB challenge

What it means

Error "invalid MonetDB challenge" thrown in sqlmapproject/sqlmap.

Source

Thrown at extra/dbwire/monetdb.py:66

def _putblock(sock, text):
    data = text.encode("utf-8")
    off = 0
    while True:
        chunk = data[off:off + _MAX_BLOCK]
        off += _MAX_BLOCK
        last = off >= len(data)
        try:
            sock.sendall(struct.pack("<H", (len(chunk) << 1) | (1 if last else 0)) + chunk)
        except (socket.error, OSError) as ex:
            raise connection_lost(ex)
        if last:
            break

def _challenge_response(challenge, user, password, database):
    parts = challenge.split(":")
    if len(parts) < 7 or parts[-1] != "":
        raise OperationalError("invalid MonetDB challenge")
    salt, server_type, protocol, hashes = parts[0], parts[1], parts[2], parts[3]
    if protocol != "9":
        raise NotSupportedError("only MAPI protocol v9 is supported")
    if server_type == "merovingian":  # proxy stage: authenticate as merovingian, real creds go to the mserver
        user, password = "merovingian", ""
    pwalgo = parts[5]
    try:
        password = hashlib.new(pwalgo, password.encode("utf-8")).hexdigest()
    except ValueError:
        raise NotSupportedError("unsupported MonetDB password algorithm: %s" % pwalgo)
    pwhash = None
    for algo in hashes.split(","):
        try:
            h = hashlib.new(algo)
        except ValueError:
            continue
        h.update(password.encode("utf-8"))
        h.update(salt.encode("utf-8"))

View on GitHub (pinned to 0a35b20e39)

When it happens

Trigger: Thrown at extra/dbwire/monetdb.py:66 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of sqlmapproject/sqlmap@0a35b20e39 (2026-08-26). Data as JSON: /api/errors/59265831c735fe26. Report an issue: GitHub.