Method authHostbased

lib/protocol/Protocol.js:750–835

(username, pubKey, hostname, userlocal, keyAlgo, cbSign)

    });
  }
  authHostbased(username, pubKey, hostname, userlocal, keyAlgo, cbSign) {
    // TODO: Make DRY by sharing similar code with authPK()
    if (this._server)
      throw new Error('Client-only method called in server mode');

    pubKey = parseKey(pubKey);
    if (pubKey instanceof Error)
      throw new Error('Invalid key');

    const keyType = pubKey.type;
    pubKey = pubKey.getPublicSSH();

    if (typeof keyAlgo === 'function') {
      cbSign = keyAlgo;
      keyAlgo = undefined;
    }
    if (!keyAlgo)
      keyAlgo = keyType;

    const userLen = Buffer.byteLength(username);
    const algoLen = Buffer.byteLength(keyAlgo);
    const pubKeyLen = pubKey.length;
    const sessionID = this._kex.sessionID;
    const sesLen = sessionID.length;
    const hostnameLen = Buffer.byteLength(hostname);
    const userlocalLen = Buffer.byteLength(userlocal);
    const data = Buffer.allocUnsafe(
      4 + sesLen + 1 + 4 + userLen + 4 + 14 + 4 + 9 + 4 + algoLen
        + 4 + pubKeyLen + 4 + hostnameLen + 4 + userlocalLen
    );
    let p = 0;

    writeUInt32BE(data, sesLen, p);
    data.set(sessionID, p += 4);

    data[p += sesLen] = MESSAGE.USERAUTH_REQUEST;

    writeUInt32BE(data, userLen, ++p);
    data.utf8Write(username, p += 4, userLen);

    writeUInt32BE(data, 14, p += userLen);
    data.utf8Write('ssh-connection', p += 4, 14);

    writeUInt32BE(data, 9, p += 14);
    data.utf8Write('hostbased', p += 4, 9);

    writeUInt32BE(data, algoLen, p += 9);
    data.utf8Write(keyAlgo, p += 4, algoLen);

    writeUInt32BE(data, pubKeyLen, p += algoLen);
    data.set(pubKey, p += 4);

    writeUInt32BE(data, hostnameLen, p += pubKeyLen);
    data.utf8Write(hostname, p += 4, hostnameLen);

    writeUInt32BE(data, userlocalLen, p += hostnameLen);
    data.utf8Write(userlocal, p += 4, userlocalLen);