static int pgpPrtUserID(pgpTag tag, const uint8_t *h, size_t hlen,
			pgpDigParams _digp)
{
    pgpPrtVal("", pgpTagTbl, tag);
    if (_print)
	fprintf(stderr, " \"%.*s\"", (int)hlen, (const char *)h);
    pgpPrtNL();
    free(_digp->userid);
    _digp->userid = memcpy(xmalloc(hlen+1), h, hlen);
    _digp->userid[hlen] = '\0';
    return 0;
}