Key fail, says OK instead

From	Sensei <sensei.wa@apple.me.com>
Newsgroups	comp.security.ssh
Subject	Key fail, says OK instead
Date	2011-07-04 17:09 +0200
Organization	Aioe.org NNTP Server
Message-ID	<iusl2k$2qk$1@speranza.aioe.org> (permalink)

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Dear all,

I have set up a SSH server with a private key login. It worked 
perfectly from my client, until yesterday, when a back-out hit my 
client. Now, it does not work.

The problem is that the key is successfully loaded:



# ssh -v -i X/THE_KEY user@ssh.server
OpenSSH_5.1p1 Debian-5, OpenSSL 0.9.8g 19 Oct 2007
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Connecting to ssh.server [192.1.1.1] port 22.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug1: identity file X/THE_KEY type -1
debug1: Remote protocol version 2.0, remote software version 
OpenSSH_5.1p1 Debian-5
debug1: match: OpenSSH_5.1p1 Debian-5 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.1p1 Debian-5
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-cbc hmac-md5 none
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Host 'ssh.server' is known and matches the RSA host key.
debug1: Found key in /root/.ssh/known_hosts:15
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Trying private key: X/THE_KEY
debug1: read PEM private key done: type RSA
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: password
user@ssh.server's password:


Why doesn't the key work anymore? I've tried to mangle it, and of 
course, loading fails, so I am sure the ssh binary isn't corrupted:


# ssh -v -i X/WRONG_KEY user@ssh.server
OpenSSH_5.1p1 Debian-5, OpenSSL 0.9.8g 19 Oct 2007
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Connecting to ssh.server [192.1.1.1] port 22.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug1: identity file X/WRONG_KEY type -1
debug1: Remote protocol version 2.0, remote software version 
OpenSSH_5.1p1 Debian-5
debug1: match: OpenSSH_5.1p1 Debian-5 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.1p1 Debian-5
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-cbc hmac-md5 none
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Host 'ssh.server' is known and matches the RSA host key.
debug1: Found key in /root/.ssh/known_hosts:15
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Trying private key: X/WRONG_KEY
debug1: PEM_read_PrivateKey failed
debug1: read PEM private key done: type <unknown>
Enter passphrase for key 'X/WRONG_KEY':


Can you pint me in the right direction?

Thanks!!


-- 

Sensei <Sensei's e-mail is at Me-dot-com>

Research (n.): a discovery already published by a chinese guy one month
               before you, copying a russian who did it in the 60s.

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Key fail, says OK instead Sensei <sensei.wa@apple.me.com> - 2011-07-04 17:09 +0200
  Re: Key fail, says OK instead Richard E. Silverman <res@qoxp.net> - 2011-07-07 00:28 -0400

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