[Bug 201786] Re: ssh Agent admitted failure to sign using the key on big endian machines

[Woonjas]

Not sure if this is the same.
Connecting to my dreamplug running Ubuntu 9.04 from  my laptop running 11.10  I'm getting the following (using ssh -vv)
....
debug1: Authentications that can continue: publickey
debug1: Offering DSA public key: app_81 at localhost
debug2: we sent a publickey packet, wait for reply
debug1: Server accepts key: pkalg ssh-dss blen 433
debug2: input_userauth_pk_ok: fp d1:e6:cb:ee:07:cb:03:5c:ab:95:91:9a:71:20:2a:de
Agent admitted failure to sign using the key.
debug1: Trying private key: /home/nwestra/.ssh/id_rsa
debug1: Trying private key: /home/nwestra/.ssh/id_ecdsa
debug2: we did not send a packet, disable method
debug1: No more authentication methods to try.
Permission denied (publickey).

Using the same key from an ssh session on an old box running 9.10 works.

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Title:
  ssh Agent admitted failure to sign using the key on big endian
  machines

Status in Seahorse:
  Fix Released
Status in “gnome-keyring” package in Ubuntu:
  Triaged
Status in “openssh” package in Ubuntu:
  Confirmed

Bug description:
  on hardy (preserved home folder from feisty) i get the following when
  i try to ssh

  Agent admitted failure to sign using the key.
  Permission denied (publickey).

  or with verbose on

  sam at titania:~$ ssh -v oberon
  OpenSSH_4.7p1 Debian-4ubuntu1, OpenSSL 0.9.8g 19 Oct 2007
  debug1: Reading configuration data /home/sam/.ssh/config
  debug1: Applying options for oberon
  debug1: Reading configuration data /etc/ssh/ssh_config
  debug1: Applying options for *
  debug1: Connecting to ###### [######] port ##.
  debug1: Connection established.
  debug1: identity file /home/sam/.ssh/identity type -1
  debug1: identity file /home/sam/.ssh/id_rsa type 1
  debug1: identity file /home/sam/.ssh/id_dsa type -1
  debug1: Remote protocol version 2.0, remote software version OpenSSH_4.6p1 Debian-5ubuntu0.1
  debug1: match: OpenSSH_4.6p1 Debian-5ubuntu0.1 pat OpenSSH*
  debug1: Enabling compatibility mode for protocol 2.0
  debug1: Local version string SSH-2.0-OpenSSH_4.7p1 Debian-4ubuntu1
  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: using hostkeyalias: oberon
  debug1: Host 'oberon' is known and matches the RSA host key.
  debug1: Found key in /home/sam/.ssh/known_hosts:1
  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
  debug1: Next authentication method: publickey
  debug1: Offering public key: /home/sam/.ssh/id_rsa
  debug1: Server accepts key: pkalg ssh-rsa blen 277
  Agent admitted failure to sign using the key.
  debug1: Trying private key: /home/sam/.ssh/identity
  debug1: Trying private key: /home/sam/.ssh/id_dsa
  debug1: No more authentication methods to try.
  Permission denied (publickey).

  I tried generating a new key. this worked for a few logons, but then i
  get back to this error.

  I think it is to do with the local key agent. i found that
   SSH_AUTH_SOCK=0 ssh oberon
  works fine.

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