nl_tokens: Unpacks Keyczar s output format
pl_tokens: function _unpackOutput ( <mask> ) { if ( message . charAt ( 0 ) != keyczar_util . VERSION_BYTE ) { throw new Error ( 'Unsupported version byte: ' + message . charCodeAt ( 0 ) ) ; } var keyhash = message . substr ( 1 , keyczar_util . KEYHASH_LENGTH ) ; message = message . substr ( 1 + keyczar_util . KEYHASH_LENGTH ) ; return { keyhash : keyhash , message : message } ; }