https://bugzilla.mindrot.org/show_bug.cgi?id=3279
Bug ID: 3279
Summary: UpdateHostKeys triggers
"client_global_hostkeys_private_confirm: server gave
bad signature for RSA key 0" error message
Product: Portable OpenSSH
Version: 8.5p1
Hardware: Other
OS: Windows 10
Status: NEW
Severity: normal
Priority: P5
Component: ssh
Assignee: [email protected]
Reporter: [email protected]
Upstream issue: https://github.com/git-for-windows/git/issues/3108
$ ssh -V
OpenSSH_8.5p1, OpenSSL 1.1.1j 16 Feb 2021
Platform:
Windows 10
The following recipe requires a gitlab.com account with ssh key
attached.
```
$ ssh [email protected] -i ~/.ssh/XXX
client_global_hostkeys_private_confirm: server gave bad signature for
RSA key 0
PTY allocation request failed on channel 0
Welcome to GitLab, @XXX!
Connection to gitlab.com closed.
```
As found on the internet disabling UpdateHostKeys turns the error
message off:
```
$ ssh -o UpdateHostKeys=no [email protected] -i ~/.ssh/github_ed255519
PTY allocation request failed on channel 0
Welcome to GitLab, @t-b!
Connection to gitlab.com closed.
```
The ssh server:
```
debug1: Remote protocol version 2.0, remote software version
OpenSSH_7.9p1 Debian-10+deb10u2
debug1: compat_banner: match: OpenSSH_7.9p1 Debian-10+deb10u2 pat
OpenSSH* compat 0x04000000
````
Host Key of the server:
```
gitlab.com ssh-ed25519
AAAAC3NzaC1lZDI1NTE5AAAAIAfuCHKVTjquxvt6CM6tdG4SLp1Btn/nOeHHE5UOzRdf
```
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