static char * format_key ( const struct sshkey * key ) {
 char * ret , * fp = sshkey_fingerprint ( key , options . fingerprint_hash , SSH_FP_DEFAULT ) ;
 xasprintf ( & ret , "%s %s" , sshkey_type ( key ) , fp ) ;
 free ( fp ) ;
 return ret ;
 }
static char * format_key ( const struct sshkey * key ) {
 char * ret , * fp = sshkey_fingerprint ( key , options . fingerprint_hash , SSH_FP_DEFAULT ) ;
 xasprintf ( & ret , "%s %s" , sshkey_type ( key ) , fp ) ;
 free ( fp ) ;
 return ret ;
 }