________________________________ From: Jan Høydahl <jan....@cominvent.com> Sent: Thursday, September 27, 2018 5:12 AM To: user@zookeeper.apache.org Subject: Digest auth with classic TCP transport
Hi We use ZK 3.4.13, and unfortunately cannot use Netty transport and SSL. We plan to use digest authentication and Zookeeper ACL protection. Question is, since we cannot use SSL, is there some other way to make sure the user credentials are not sniffed over the network and thus let an attacker impersonate our application and cange the content in Zookeeper? Does the Zookeeper client do some smart moves to protect/hash the password over the network? I suppose the binary transport is easy to decipher for those who try. MG>if you're prevented from implementing SSL why not use TLSv1.3? MG>with TLSv1.3 you can implement encryption/decryption with crypto private/public keys and x509 certs https://en.wikipedia.org/wiki/Transport_Layer_Security Transport Layer Security - Wikipedia<https://en.wikipedia.org/wiki/Transport_Layer_Security> Transport Layer Security (TLS) – and its predecessor, Secure Sockets Layer (SSL), which is now deprecated by the Internet Engineering Task Force (IETF) – are cryptographic protocols that provide communications security over a computer network. Several versions of the protocols find widespread use in applications such as web browsing, email, instant messaging, and voice over IP (VoIP). en.wikipedia.org MG>path of least resistance is to contact verisign and ask them to generate keys, certs and allow them to act as CA MG>Caveat: tls1.3 implementation is slow and is supported by Mozilla v60...and some versions of chrome MG>as far as ciphers to prevent MIMA do not implement TLS_DH_anon and TLS_ECDH_anon key agreement methods MG>do not authenticate the server MG>you will want public key size to be min 2048bit to conform to chrome secure transmission requirements MG>securing message is done thru MD5 or SHA but you will need to incorporate selected algo into MG>supported cipher-suite(s) https://en.wikipedia.org/wiki/Cipher_suite Cipher suite - Wikipedia<https://en.wikipedia.org/wiki/Cipher_suite> A cipher suite is a set of algorithms that help secure a network connection that uses Transport Layer Security (TLS) or Secure Socket Layer (SSL). The set of algorithms that cipher suites usually contain include: a key exchange algorithm, a bulk encryption algorithm, and a message authentication code (MAC) algorithm.. The key exchange algorithm is used to exchange a key between two devices. en.wikipedia.org HTH Martin -- Jan Høydahl Cominvent AS - www.cominvent.com<http://www.cominvent.com>
