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Subject:	Re: Cygwin 3.4.9 - how to install ssh-keygen
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Date:	Mon, 27 Nov 2023 08:46:25 +0100
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From:	Matthias--- via Cygwin <cygwin AT cygwin DOT com>
Reply-To:	"Matthias AT gmx DOT at" <matthias DOT meyer AT gmx DOT at>
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X-MIME-Autoconverted:	from base64 to 8bit by delorie.com id 3AR7l8A2026708

Am Sonntag, dem 26.11.2023 um 12:21 -0700 schrieb Brian Inglis via Cygwin:
> On 2023-11-26 10:12, Matthias--- via Cygwin wrote:
> > Am Samstag, dem 25.11.2023 um 19:45 +0100 schrieb ASSI via Cygwin:
> > > Matthias--- via Cygwin writes:
> > > > 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'm fairly certain that this is not Cygwin's ssh-keygen…
>
> > I believe it is Cygwin's ssh-keygen because it is loading cygwin dlls too:
> >     strace /usr/bin/ssh-keygen.exe -A
> >     --- Process 14116 created
> >     --- Process 14116 loaded C:\Windows\System32\ntdll.dll at 00007ffcbff90000
> >     --- Process 14116 loaded C:\Windows\System32\kernel32.dll at 00007ffcbe610000
> >     --- Process 14116 loaded C:\Windows\System32\KernelBase.dll at 00007ffcbd710000
> >     --- Process 14116 loaded C:\Windows\System32\apphelp.dll at 00007ffcbaea0000
> >     --- Process 14116 loaded C:\cygwin64\bin\cygcrypto-3.dll at 00000003ff8c0000
> >     --- Process 14116 loaded C:\cygwin64\bin\cygwin1.dll at 00007ffc74c90000
> >     --- Process 14116 loaded C:\cygwin64\bin\cyggcc_s-seh-1.dll at 00000003ff790000
> >     --- Process 14116 loaded C:\cygwin64\bin\cygz.dll at 00000003feb50000
> >         1       1 [main] ssh-keygen (14116) **********************************************
> >       279     280 [main] ssh-keygen (14116) Program name: C:\cygwin64\bin\ssh-keygen.exe
> > (windows pid
> >     14116)
> >       190     470 [main] ssh-keygen (14116) OS version:   Windows NT-10.0
> >       125     595 [main] ssh-keygen (14116) **********************************************
> >     --- Process 14116 loaded C:\Windows\System32\advapi32.dll at 00007ffcbfac0000
> >     :
> >     --- Process 14116 loaded C:\Windows\System32\ntmarta.dll at 00007ffcbc790000
> >     --- Process 14116 thread 15044 created
> >     --- Process 14116 thread 10544 created
> >     --- Process 14116 thread 13588 created
> >     --- Process 14116, exception c0000005 at 0000000000000000
> >     --- Process 14116 thread 15044 exited with status 0x0
> >     --- Process 14116 thread 10544 exited with status 0xc0000005
> >     --- Process 14116 thread 14316 exited with status 0xc0000005
> >     --- Process 14116 exited with status 0xc0000005
> >     Segmentation fault
> >
> > The Windows OpenSSH-Client is also installed in my VM:
> >     strace /cygdrive/C/Windows/System32/OpenSSH/ssh-keygen.exe -A
> >     --- Process 12532 created
> >     --- Process 12532 loaded C:\Windows\System32\ntdll.dll at 00007ffcbff90000
> >     --- Process 12532 loaded C:\Windows\System32\kernel32.dll at 00007ffcbe610000
> >     --- Process 12532 loaded C:\Windows\System32\KernelBase.dll at 00007ffcbd710000
> >     --- Process 12532 loaded C:\Windows\System32\apphelp.dll at 00007ffcbaea0000
> >     :
> >     --- Process 12532 loaded C:\Windows\System32\winrnr.dll at 00007ffc77150000
> >     ssh-keygen: generating new host keys: RSA DSA ECDSA ED25519
> >     --- Process 12532 unloaded DLL at 00007ffc77110000
> >     :
> >     and all keys are created in C:\ProgramData\ssh
> >
> > So it looks like cygwin ssh-keygen.exe have a problem :(
> > BTW: similar Segmentation faults I have with "strace /usr/sbin/sshd.exe --help" as well as with
> > "strace /usr/bin/ssh.exe --help".
> > Both are loading cygwin dlls like cygcrypt-2.dll or cygiconv-2.dll as well as Windows dlls like
> > ntdll.dll or kernel32.dll.
> >
> > Any hints?
>
> That intercept does not run under strace on my Win 10 latest patches system.
> My strace shows DHCP contacted before running gethostname, then keygens.
>
> Does this system run a legacy A/V?
>
> Add to BLODA? - legacy embedded security provider interface:
>
> https://learn.microsoft.com/en-us/previous-versions/windows/embedded/aa939264(v=winembedded.5)?redirectedfrom=MSDN
>
> --
> Take care. Thanks, Brian Inglis              Calgary, Alberta, Canada
>
> La perfection est atteinte                   Perfection is achieved
> non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
> mais lorsqu'il n'y a plus rien à retirer     but when there is no more to cut
>                                  -- Antoine de Saint-Exupéry
A/V is Antivirus? My VM is running Avira. Deactivating it haven't impact on ssh-keygen. I still have
an Segmentation fault.

Br
Matthias


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