Description Andreas Sewe 2016-11-17 04:30:25 EST

Pardon me if this is the wrong product/component, but I have no idea who contributes org.eclipse.jsch.ui.

At the moment, Eclipse selects by default some really old (i.e., broken) cryptography on its General > Network Connections > SSH2 preference page.

For "MAC methods" it selects (in this order)

 [X] hmac-md5
 [X] hmac-sha1
 [X] hmac-sha2-256
 [X] hmac-sha1-96
 [X] hmac-md5-96

For "Key Exchange Methods" it selects (in this order)

 [X] diffie-hellman-group1-sha1
 [X] diffie-hellman-group14-sha1
 [X] diffie-hellman-group-exchange-sha1
 [X] diffie-hellman-group-exchange-sha256

I am by no means an expert on cryptography, but maybe we should just follow pre-existing guidelines. Bettercrypto.org's Applied Crypto Hardening [1] suggests (in Section 2.2.1) some selection/ordering of options (not all available in Jsch) for the OpenSSH "MACs" and "KexAlgorithms" we could follow:

 [X] hmac-sha2-256
 [ ] hmac-sha1
 [ ] hmac-sha1-96
 [ ] hmac-md5
 [ ] hmac-md5-96

and

 [X] diffie-hellman-group-exchange-sha256
 [X] diffie-hellman-group14-sha1
 [X] diffie-hellman-group-exchange-sha1
 [ ] diffie-hellman-group1-sha1

[1] <https://bettercrypto.org/static/applied-crypto-hardening.pdf>