SSH/SFTP key exchange algorithms

I hardened my OpenSSH Server according to this guide: https://stribika.github.io/2015/01/0...ure-shell.html.
This involves enabling only the following ssh key exchange algorithms:

KexAlgorithms curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256

It seems that FlashFXP doesn't support any of these 2 algorithms:

SSH Error: failed to negotiate key exchange algorithm

Are there any plans to support at least diffie-hellman-group-exchange-sha256 ?


OpenSSH_6.6.1p1 Ubuntu-2ubuntu2 (SFTP v3) on Ubuntu 14.04

Hello,

Thank you for bringing this to my attention.

Currently curve25519-sha256@libssh.org is not supported but diffie-hellman-group-exchange-sha256 should of been, It appears that the algorithm was not enabled by default.

I've made some changes to support it as well as exposing the KEX algorithms via the Preferences and Site Manager dialogs.

Please give this test build a try
https://oss.azurewebsites.net/testr/5/ffxp5.0.0.3801-r2.zip
Unzip the flashfxp.exe file into your FlashFXP program folder replacing the existing flashfxp.exe

I can confirm, that the new build works with diffie-hellman-group-exchange-sha256
Thank you for your fast response and fix!