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public-key authorisation is not working (putty vs. openssh)

Subject: public-key authorisation is not working (putty vs. openssh)
Date: Wed, 9 Mar 2005 17:57:24 +0100
Hi,

I have putty 0.57 on a WinXP machine and OPENSSH (v3.8) on a W2K workstation
which should become a webserver (WAMP).
I want to use this combination for remote administration. So, I don't want
to use (more unsecure) password authentication, but public keys.

It works perfect with password authentication (at the moment, I didn't
disabled this method), but it's not working with public key. I tried to make
the keys with puttygen and with ssh-keygen (including key format change with
puttygen and ssh_keygen, including .\ssh\authorized_keys in my user
directory with the public key...). I googled a lot, but up to know I
couldn't find a hint. Here are the debug informations:

_________________
C:\Programme\OpenSSH\usr\sbin>sshd -d
debug1: sshd version OpenSSH_3.8.1p1
debug1: read PEM private key done: type RSA
debug1: private host key: #0 type 1 RSA
debug1: read PEM private key done: type DSA
debug1: private host key: #1 type 2 DSA
debug1: Bind to port 22 on 0.0.0.0.
Server listening on 0.0.0.0 port 22.
debug1: Server will not fork when running in debugging mode.
Connection from 192.168.115.1 port 3110
debug1: Client protocol version 2.0; client software version
PuTTY-Release-0.57
debug1: no match: PuTTY-Release-0.57
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_3.8.1p1
debug1: list_hostkey_types: ssh-rsa,ssh-dss
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: client->server aes256-cbc hmac-sha1 zlib
debug1: kex: server->client aes256-cbc hmac-sha1 zlib
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST_OLD received
debug1: SSH2_MSG_KEX_DH_GEX_GROUP sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_INIT
debug1: SSH2_MSG_KEX_DH_GEX_REPLY sent
debug1: Enabling compression at level 6.
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: KEX done
debug1: userauth-request for user thomas service ssh-connection method none
debug1: attempt 0 failures 0
debug1: userauth_banner: sent
Failed none for thomas from 192.168.115.1 port 3110 ssh2
debug1: userauth-request for user thomas service ssh-connection method
publickey

debug1: attempt 1 failures 1
debug1: test whether pkalg/pkblob are acceptable
debug1: temporarily_use_uid: 1000/513 (e=1000/513)
debug1: trying public key file /home/thomas/.ssh/authorized_keys
debug1: restore_uid: (unprivileged)
debug1: temporarily_use_uid: 1000/513 (e=1000/513)
debug1: trying public key file /home/thomas/.ssh/authorized_keys
debug1: restore_uid: (unprivileged)
Failed publickey for thomas from 192.168.115.1 port 3110 ssh2
debug1: userauth-request for user thomas service ssh-connection method
keyboard-
interactive
debug1: attempt 2 failures 2
debug1: keyboard-interactive devs
debug1: auth2_challenge: user=thomas devs=
debug1: kbdint_alloc: devices ''
Failed keyboard-interactive for thomas from 192.168.115.1 port 3110 ssh2
-------------------------------
I'm not a specialist in linux and programming, so the debug info is not
helping me. Has anybody a hint for me?

Thanks in advance for the help.
TK



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