From: Etienne Champetier Date: Mon, 10 Jul 2023 05:56:05 +0000 (+0200) Subject: dropbear: add ed25519 for failsafe key X-Git-Tag: v23.05.0-rc3~85 X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=ee910d1e67c5ebba3bc2c136c8c6b5358a8c17b5;p=openwrt%2Fstaging%2Fhauke.git dropbear: add ed25519 for failsafe key At least Fedora and RHEL 9 set RSAMinSize=2048, so when trying to use failsafe, we get 'Bad server host key: Invalid key length' To workaround the issue, we can use: ssh -o RSAMinSize=1024 ... Generating 2048 bits RSA is extremely slow, so add ed25519. We keep RSA 1024 to be as compatible as possible. Signed-off-by: Etienne Champetier (cherry picked from commit 6ac61dead99ff6b9df00c29b7a858772449718b2) --- diff --git a/package/network/services/dropbear/files/dropbear.failsafe b/package/network/services/dropbear/files/dropbear.failsafe index a98ede459a..97bd12d58a 100755 --- a/package/network/services/dropbear/files/dropbear.failsafe +++ b/package/network/services/dropbear/files/dropbear.failsafe @@ -1,8 +1,9 @@ #!/bin/sh failsafe_dropbear () { - dropbearkey -t rsa -s 1024 -f /tmp/dropbear_failsafe_host_key - dropbear -r /tmp/dropbear_failsafe_host_key <> /dev/null 2>&1 + dropbearkey -t rsa -s 1024 -f /tmp/dropbear_rsa_failsafe_host_key + dropbearkey -t ed25519 -f /tmp/dropbear_ed25519_failsafe_host_key + dropbear -r /tmp/dropbear_rsa_failsafe_host_key -r /tmp/dropbear_ed25519_failsafe_host_key <> /dev/null 2>&1 } boot_hook_add failsafe failsafe_dropbear