OpenSSH PKCS12-based public keys are invalid for LP

SSH public keys usually have a comment field at the end, but it seems that ssh-keygen -y omits it. Try adding a space and then some key text after the key data.

William, really worked after a comment, but im thinking if the comment field isnt fully optional. The RFC 4716 refer as SHOULD, but ssh-keygen [1] just returns NULL to comment if it isnt present in command-line.

[1]: http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/ssh-keygen.c?rev=1.218;content-type=text%2Fx-cvsweb-markup

RFC4716 specifies a different encoding; we use the traditional and almost universal OpenSSH authorized_keys format, in which the comment is a mandatory field. From the authorized_keys section of the OpenSSH manpage:

  Protocol 2 public key consist of: options, keytype, base64-encoded
  key, comment. The options field is optional; its presence is
  determined by whether the line starts with a number or not (the
  options field never starts with a number)."

Despite the field being mandatory, OpenSSH seems to function without a comment. But it's rather uncommon and not something that Launchpad supports today.