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Subject: Re: Cygwin 3.4.9 - how to install ssh-keygen
To: "Dale Lobb (Sys Admin)" <Dale DOT Lobb AT bryanhealth DOT org>,
        "cygwin AT cygwin DOT com"
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Date: Sat, 25 Nov 2023 17:12:33 +0100
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From: Matthias--- via Cygwin <cygwin AT cygwin DOT com>
Reply-To: "Matthias AT gmx DOT li" <matthias DOT meyer AT gmx DOT li>
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> > -----Original Message-----
> > From: Cygwin <cygwin-bounces+dale.lobb=bryanhealth DOT org AT cygwin DOT com>
> > On Behalf Of Matthias--- via Cygwin
> > Sent: Friday, November 24, 2023 5:32 AM
> > To: cygwin AT cygwin DOT com
> > Subject: EXTERNAL SENDER: Re: Cygwin 3.4.9 - how to install ssh-keygen
> >
> > Am Montag, dem 20.11.2023 um 17:54 +0100 schrieb mailto:Matthias AT gmx DOT li:
> > > Dear all,
> > >
> > > I've installed cygwin 3.4.9-1 in my virtualbox running on Windows 10.
> > > After installing defaults plus openssh 9.5p 1-1, I open the Cygwin64-
> > Terminal as Administrator and
> > > run ssh-host-config.
> > >  * Answered "yes" to create the /etc/ssh_config and /etc/sshd_config
> > >  * Answered "no" to use StrictMode
> > >  * and "yes" to install sshd as a service
> > >  * I just press <enter> for the question for "Value of CYGWIN for the daemon".
> > > cygrunsrv -S cygsshd will not start the sshd. The logfile say "no hostkeys available".
> > >
> > > Unfortunately  I can't find ssh-keygen in the installable packages.
> > > Howto install ssh-keygen or how to create hostkeys?
> > >
> > > Thanks in advance
> > > Matthias
> > >
> > Hello,
> >
> > I installed cygwin 3.4.9-1 with all defaults plus openssh 9.5p 1-1 plus rsync
> > 3.2.7-1 in my virtualbox running on Windows 10 again.
> >
> > In /var/log/setup.log I found "can't run /etc/postinstall/openssl.sh: No such file"
> > Anyhow, I opened the Cygwin64-Terminal as Administrator and run ssh-host-config
> > but no host-keys has been created:
> >    $ ssh-host-config
> >
> >    *** Info: Generating missing SSH host keys
> >    *** Info: Creating default /etc/ssh_config file
> >    *** Info: Creating default /etc/sshd_config file
> >
> >    *** Info: StrictModes is set to 'yes' by default.
> >    *** Info: This is the recommended setting, but it requires that the POSIX
> >    *** Info: permissions of the user's home directory, the user's .ssh
> >    *** Info: directory, and the user's ssh key files are tight so that
> >    *** Info: only the user has write permissions.
> >    *** Info: On the other hand, StrictModes don't work well with default
> >    *** Info: Windows permissions of a home directory mounted with the
> >    *** Info: 'noacl' option, and they don't work at all if the home
> >    *** Info: directory is on a FAT or FAT32 partition.
> >    *** Query: Should StrictModes be used? (yes/no) no
> >    *** Info: Updating /etc/sshd_config file
> >
> >    *** Query: Do you want to install sshd as a service?
> >    *** Query: (Say "no" if it is already installed as a service) (yes/no) yes
> >    *** Query: Enter the value of CYGWIN for the daemon: []
> >
> >    *** Info: The sshd service has been installed under the LocalSystem
> >    *** Info: account (also known as SYSTEM). To start the service now, call
> >    *** Info: `net start cygsshd' or `cygrunsrv -S cygsshd'.  Otherwise, it
> >    *** Info: will start automatically after the next reboot.
> >
> >    *** Info: Host configuration finished. Have fun!
> >
> >    $ ls -alh /etc/ssh*
> >    -rw-r--r-- 1 SYSTEM Administratoren 1.5K Nov 24 12:02 /etc/ssh_config
> >    -rw-r--r-- 1 SYSTEM Administratoren 3.1K Nov 24 12:02 /etc/sshd_config
> >
> > Also running ssh-user-config don't create any keys:
> >    $ ssh-user-config
> >    *** Query: Shall I create a SSH2 RSA identity file for you? (yes/no) yes
> >    *** Info: Generating /home/meyer/.ssh/id_rsa
> >    *** Query: Do you want to use this identity to login to this machine?
> > (yes/no) yes
> >    *** Info: Adding to /home/meyer/.ssh/authorized_keys
> >    cat: /home/meyer/.ssh/id_rsa.pub: No such file or directory
> >    *** Query: Shall I create a SSH2 DSA identity file for you? (yes/no) no
> >    *** Query: Shall I create a SSH2 ECDSA identity file for you? (yes/no) no
> >    *** Query: Shall I create a (deprecated) SSH1 RSA identity file for you?
> > (yes/no) no
> >
> >    *** Info: Configuration finished. Have fun!
> >
> >    $ ls -alh $HOME/.ssh
> >    total 4.0K
> >    drwxr-xr-x 1 meyer Kein 0 Nov 24 12:11 .
> >    drwxr-xr-x 1 meyer Kein 0 Nov 24 12:11 ..
> >    -rw-r--r-- 1 meyer Kein 0 Nov 24 12:11 authorized_keys
> >
> > An indication of an installation/configuration error of ssh-keygen is that also
> >    /usr/bin/ssh-keygen -vvf /etc/ssh_host_rsa_key -N '' -t rsa
> > don't produce any output. Also if it has return value 0. BTW: Windows
> > OpenSSH isn't installed on my
> > machine.
> >
> > René Berber wrote that my files have the wrong permissions. But for shure,
> > /home and /home/meyer has
> > been created during cygwin installation and /home/meyer/.ssh by ssh-user-
> > config.
> >
> > Which permissions the directories and files should have?
> > What could the reason be that ssh-keygen don't create any key? Looks like it
> > wouldn't try it?
> >
> > Thanks in advance
> > Matthias
> >
> >
>
> Try this and look to the end.  Is there  perhaps a segmentation fault error?
>
>         $ strace ssh-keygen
>
>   I have a VM with Cygwin installed in it, which used to work for all the installed
> packages.  However, after a recent update, all binaries linked to openssl now
> produce silent segmentation faults.  Could be happening to you too.
>
> Best Regards,
>
> Dale
>
Yes - That's the reason in my VM too:
   strace ssh-keygen -A
   :
   --- Process 8280 loaded C:\Windows\System32\ntmarta.dll at 00007ffcbc790000
   --- Process 8280 thread 12528 created
   --- Process 8280 thread 15124 created
   --- Process 8280 thread 3324 created
   --- Process 8280, exception c0000005 at 0000000000000000
   --- Process 8280 thread 12528 exited with status 0x0
   --- Process 8280 loaded C:\Windows\System32\kernel.appcore.dll at 00007ffcbb550000
   --- Process 8280 thread 13908 exited with status 0xc0000005
   --- Process 8280 thread 3324 exited with status 0xc0000005
   --- Process 8280 exited with status 0xc0000005
   Segmentation fault

I've tried to install openssl 1.1.1w-1 instead openssl 3.0.11-1. but it have Segmentation fault too
Is there a way to solve it?

Br
Matthias


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