validate_keys assumes all keys end in one or more '='

[Brad Crittenden]

The public portion of an ssh key is base64 encoded, which uses '=' as padding at the end. It may require 0, 1, or 2 padding characters. Valid ssh keys may require no padding and may not end with '='

The regular expression used in validate_keys requires that the encoded portion of the key end with an '=':

keys=$(grep -c "^ssh-[dr]sa [a-zA-Z0-9: .\/=+-]\+= " "$1")

It should be changed to make the padding optional.

See https://launchpad.net/%7Efrankban/+sshkeys for a valid key that is thought to be invalid by ssh-import-lp-id.