int a2d_ASN1_OBJECT(unsigned char *out, int olen, const char *buf, int num)
	{
	int i,first,len=0,c;
	char tmp[24];
	const char *p;
	unsigned long l;

	if (num == 0)
		return(0);
	else if (num == -1)
		num=strlen(buf);

	p=buf;
	c= *(p++);
	num--;
	if ((c >= '0') && (c <= '2'))
		{
		first=(c-'0')*40;
		}
	else
		{
		ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_FIRST_NUM_TOO_LARGE);
		goto err;
		}

	if (num <= 0)
		{
		ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_MISSING_SECOND_NUMBER);
		goto err;
		}
	c= *(p++);
	num--;
	for (;;)
		{
		if (num <= 0) break;
		if ((c != '.') && (c != ' '))
			{
			ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_INVALID_SEPARATOR);
			goto err;
			}
		l=0;
		for (;;)
			{
			if (num <= 0) break;
			num--;
			c= *(p++);
			if ((c == ' ') || (c == '.'))
				break;
			if ((c < '0') || (c > '9'))
				{
				ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_INVALID_DIGIT);
				goto err;
				}
			l=l*10L+(long)(c-'0');
			}
		if (len == 0)
			{
			if ((first < 2) && (l >= 40))
				{
				ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_SECOND_NUMBER_TOO_LARGE);
				goto err;
				}
			l+=(long)first;
			}
		i=0;
		for (;;)
			{
			tmp[i++]=(unsigned char)l&0x7f;
			l>>=7L;
			if (l == 0L) break;
			}
		if (out != NULL)
			{
			if (len+i > olen)
				{
				ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_BUFFER_TOO_SMALL);
				goto err;
				}
			while (--i > 0)
				out[len++]=tmp[i]|0x80;
			out[len++]=tmp[0];
			}
		else
			len+=i;
		}
	return(len);
err:
	return(0);
	}