static int read_line(EVP_TEST *t)
{
    char *p;

    if (!BIO_gets(t->in, t->buf, sizeof(t->buf)))
        return EOF;
    t->line++;
    if ((p = strchr(t->buf, '\n')) != NULL)
        *p = '\0';
    if (t->buf[0] == '#')
        t->buf[0] = '\0';
    return t->buf[0];
}