Error: ssh: handshake failed: knownhosts: key mismatch

[jarbus]

I can pull/push my repo from github fine, but I can't push bugs. When I do, I get the following error:

➜ git bug push
Error: ssh: handshake failed: knownhosts: key mismatch

I'm using v0.8.0 on arch linux. I've got all my ssh keys in my knownhosts file.

[jarbus]

Apologies if this is just a bug with my ssh config, but I'm imagining there is an assumption of how ssh should be configured for gitbug that I'm missing.

[MichaelMure]

It could be a go-git issue. Git-bug use go-git for every git manipulation, including push/pull. From what I've seen, it can get confused sometimes by some configurations.

[kseistrup]

I'm using v0.8.0 on arch linux

I'm also on Arch Linux and experienced the same issue. I solved it like this:

$ for keytype in rsa ecdsa ed25519; do
    ssh-keyscan -t "$keytype" github.com >> ~/.ssh/known_hosts
  done
$ 

[MichaelMure]

Mentioned in go-git/go-git#619, go-git may have a fix for this but it's not in a tagged version yet.

[jarbus]

I'm also on Arch Linux and experienced the same issue. I solved it like this:

$ for keytype in rsa ecdsa ed25519; do
    ssh-keyscan -t "$keytype" github.com >> ~/.ssh/known_hosts
  done
$ 

Just made an ecdsa key to try this, I get the following error:

Error: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain

But the error goes back to the initial key mismatch error if I remove the ecdsa entry

[kseistrup]

Hm… 🤔

I didn't create an ecdsa key, I just fetched the three keytypes from remote with the ssh-keyscan thing, but there must be some other differences in our setup since it doesn't work at your end.

[maciej-trebacz]

I'm also on Arch Linux and experienced the same issue. I solved it like this:

$ for keytype in rsa ecdsa ed25519; do
    ssh-keyscan -t "$keytype" github.com >> ~/.ssh/known_hosts
  done
$ 

Thanks, this solved the issue for me!

[jarbus]

Still not working for me, even building from source with the latest version of go-git :(

[jarbus]

Update: Got it to work by ssh-add'ing my rsa key

[halloumee]

Update: Got it to work by ssh-add'ing my rsa key

Doesn't work for me both ssh-add and the for loop above :( I'm using Gitlab.

ssh-keygen -l -v -f ~/.ssh/id_rsa.pub
3072 SHA256:AxuOIT7oMjUmrtt4x90l2K6qJHRSf2FyjjL8rvvfRPA user@host (RSA)
+---[RSA 3072]----+
|                 |
|                 |
|  ....o=         |
| oo..+*++        |
|oo*=.oo=SE       |
|++oo+ o +..      |
|+o.. o o +       |
|o*. + . =        |
|+oo==+oo .       |
+----[SHA256]-----+

More:

cat ~/.ssh/config
Host *
  IdentityFile ~/.ssh/id_rsa
  KexAlgorithms +diffie-hellman-group14-sha1

cat ~/.ssh/known_hosts | grep gitlab.com
gitlab.com ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCsj2.....xxxxxxASUEMaieWVNTRCtJ4S8H+9

git bug bridge push works, btw.

[prologic]

I'm getting a kind of similar but different error:

prologic@Jamess-iMac
Sat Dec 24 16:19:04
~/Projects/legit
 (main) 0
$ git bug push
Error: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain

Apparently it doesn't know how to auth? 🤔 Normally I use a running ssh-agent

[ttiurani]

I hit this issue with 0.8.0 (on OSX from brew) and solved it by removing the brew version and compiling the latest master from source. After that git bug push worked.