Putty and pre-shared keys with Cygwin's sshd

[Andrew DeFaria]

On 1/23/2012 1:57 AM, Corinna Vinschen wrote:
> On Jan 22 16:30, Andrew DeFaria wrote:
>> On 1/22/2012 10:21 AM, Len Giambrone wrote:
>>> I believe that PuTTy is SSH2, while Cygwin is OpenSSH.  You can convert them using
>>> ssh-keygen:
>>>
>>> ssh-keygen -f putty_key -i>   openssh_key
>> I tried this. It didn't work. Same error as before.
>>
>> Read 8.2.12 of the Putty help file - had no idea there was a format
>> difference I had to do anything about! Tried what it said to do, use
>> Conversions: Export to OpenSSH. But that key looks like:
>>
>> Ltsdo-adefaria:more /tmp/sshkey
>> -----BEGIN DSA PRIVATE KEY-----
>> MIIBuwIBAAKBgQDI+RkFLTib52+4+OzI+035r8fIConadaJuXNd+ZRSOvoLJar44
>> 1m7jgSnp2A52LJ8LJeC99c7NQ1BBoHueRkgBWReH7orWH2T/vlFrPRgIU48vvgPH
>> 4OrLFRtmN/uYj/BTbWFilN2jFZiiESSr4pSOPNNSblqj+UYXfFxc2ZrhIQIVANFm
>> lV9qPmupo+/ZQqw1uTRypqve98yI2ZbXTuwIFLAps2T4rQKjmgmfghNWgmUEP0Sm
>> V8qEfW8JvSh773fwYgtsAfos/+GPqc7V+UysKT2Na+5sOgqALSX6yfLBi0xAA2Iy
>> ToRtrHupAoGAOS7f1yopMnELx7GhAtEtREN1zDikwa8dVhilM1M38+eZH4Z0Wd/3
>> H9W2iKKYjgj8lIIYGiXUxjEWhA3n/3N6HDT0O5X97Pp+dM7oHlAaKtGl0Y9ao+Zn
>> SmXSquCsokL+1mh1baIe+VcyV2EA7Uat/B0zIlGpwfq4bQv0DmCjl4gCFDBh6pvn
>> ckhR34s8s2jaQnkdgv+p
>> -----END DSA PRIVATE KEY-----
>>
>> Whereas all of the lines of my ~/.ssh/authorized_keys files are
>> single, loooong lines.
> Maybe you *should* read the man pages.  The above is the private part of
> the key.  authorized_keys is the file on the server side so it hold only
> public keys.
You're right. I made a mistake. Corrected it:

Ltsdo-adefaria:cat /tmp/sshkey_public
---- BEGIN SSH2 PUBLIC KEY ----
Comment: "dsa-key-20120121"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Added this to ~/.ssh/authorized_keys. Still fails - same way. Does 
OpenSSH accept these multiline keys?
>
>> Can anybody give me clear, concise but complete end to end
>> instructions on how to get this to work?
> There are tons of that in the net.  Just google for "putty openssh".
I followed http://unixwiz.net/techtips/putty-openssh.html pretty much 
exactly 'cept instead of Linux I'm using Cygwin. It didn't work. It 
still prompts me for my password.

I think the problem is that my home directory is on a file server and 
that file server is not playing nice. By this I mean:

Ltsdo-adefaria:touch foo
Ltsdo-adefaria:ls -l foo
-rw-r--r-- 1 adefaria clearusers 0 Jan 23 10:59 foo
Ltsdo-adefaria:chmod 600 foo
Ltsdo-adefaria:ls -l foo
-rw-r--r-- 1 adefaria clearusers 0 Jan 23 10:59 foo
Ltsdo-adefaria:df .
Filesystem            1K-blocks   Used Available Use% Mounted on
//fs-irva-82/adefaria   5242880 343572   4899308   7% /home/adefaria
Ltsdo-adefaria:echo $CYGWIN
ntsec smbntsec winsymlinks nodosfilewarning
Ltsdo-adefaria:

I've run across this before where the remote, often, samba server is not 
handling permissions like a Windows SMB server would.
-- 
Andrew DeFaria <http://defaria.com>
Does fuzzy logic tickle?


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