char *X509_NAME_oneline(X509_NAME *a, char *buf, int len)
	{
	X509_NAME_ENTRY *ne;
int i;
	int n,lold,l,l1,l2,num,j,type;
	const char *s;
	char *p;
	unsigned char *q;
	BUF_MEM *b=NULL;
	static char hex[17]="0123456789ABCDEF";
	int gs_doit[4];
	char tmp_buf[80];
#ifdef CHARSET_EBCDIC
	char ebcdic_buf[1024];
#endif

	if (buf == NULL)
		{
		if ((b=BUF_MEM_new()) == NULL) goto err;
		if (!BUF_MEM_grow(b,200)) goto err;
		b->data[0]='\0';
		len=200;
		}
	if (a == NULL)
	    {
	    if(b)
		{
		buf=b->data;
		Free(b);
		}
	    strncpy(buf,"NO X509_NAME",len);
	    return buf;
	    }

	len--; /* space for '\0' */
	l=0;
	for (i=0; i<sk_X509_NAME_ENTRY_num(a->entries); i++)
		{
		ne=sk_X509_NAME_ENTRY_value(a->entries,i);
		n=OBJ_obj2nid(ne->object);
		if ((n == NID_undef) || ((s=OBJ_nid2sn(n)) == NULL))
			{
			i2t_ASN1_OBJECT(tmp_buf,sizeof(tmp_buf),ne->object);
			s=tmp_buf;
			}
		l1=strlen(s);

		type=ne->value->type;
		num=ne->value->length;
		q=ne->value->data;
#ifdef CHARSET_EBCDIC
                if (type == V_ASN1_GENERALSTRING ||
		    type == V_ASN1_VISIBLESTRING ||
		    type == V_ASN1_PRINTABLESTRING ||
		    type == V_ASN1_TELETEXSTRING ||
		    type == V_ASN1_VISIBLESTRING ||
		    type == V_ASN1_IA5STRING) {
                        ascii2ebcdic(ebcdic_buf, q,
				     (num > sizeof ebcdic_buf)
				     ? sizeof ebcdic_buf : num);
                        q=ebcdic_buf;
		}
#endif

		if ((type == V_ASN1_GENERALSTRING) && ((num%4) == 0))
			{
			gs_doit[0]=gs_doit[1]=gs_doit[2]=gs_doit[3]=0;
			for (j=0; j<num; j++)
				if (q[j] != 0) gs_doit[j&3]=1;

			if (gs_doit[0]|gs_doit[1]|gs_doit[2])
				gs_doit[0]=gs_doit[1]=gs_doit[2]=gs_doit[3]=1;
			else
				{
				gs_doit[0]=gs_doit[1]=gs_doit[2]=0;
				gs_doit[3]=1;
				}
			}
		else
			gs_doit[0]=gs_doit[1]=gs_doit[2]=gs_doit[3]=1;

		for (l2=j=0; j<num; j++)
			{
			if (!gs_doit[j&3]) continue;
			l2++;
#ifndef CHARSET_EBCDIC
			if ((q[j] < ' ') || (q[j] > '~')) l2+=3;
#else
			if ((os_toascii[q[j]] < os_toascii[' ']) ||
			    (os_toascii[q[j]] > os_toascii['~'])) l2+=3;
#endif
			}

		lold=l;
		l+=1+l1+1+l2;
		if (b != NULL)
			{
			if (!BUF_MEM_grow(b,l+1)) goto err;
			p= &(b->data[lold]);
			}
		else if (l > len)
			{
			break;
			}
		else
			p= &(buf[lold]);
		*(p++)='/';
		memcpy(p,s,(unsigned int)l1); p+=l1;
		*(p++)='=';

#ifndef CHARSET_EBCDIC /* q was assigned above already. */
		q=ne->value->data;
#endif

		for (j=0; j<num; j++)
			{
			if (!gs_doit[j&3]) continue;
#ifndef CHARSET_EBCDIC
			n=q[j];
			if ((n < ' ') || (n > '~'))
				{
				*(p++)='\\';
				*(p++)='x';
				*(p++)=hex[(n>>4)&0x0f];
				*(p++)=hex[n&0x0f];
				}
			else
				*(p++)=n;
#else
			n=os_toascii[q[j]];
			if ((n < os_toascii[' ']) ||
			    (n > os_toascii['~']))
				{
				*(p++)='\\';
				*(p++)='x';
				*(p++)=hex[(n>>4)&0x0f];
				*(p++)=hex[n&0x0f];
				}
			else
				*(p++)=q[j];
#endif
			}
		*p='\0';
		}
	if (b != NULL)
		{
		p=b->data;
		Free(b);
		}
	else
		p=buf;
	return(p);
err:
	X509err(X509_F_X509_NAME_ONELINE,ERR_R_MALLOC_FAILURE);
	if (b != NULL) BUF_MEM_free(b);
	return(NULL);
	}