while ((len = BIO_read(b, tmpbuf, 1024))) {
while ((len = BIO_read(b, tmpbuf, sizeof tmpbuf))) {
OCSP_RESPONSE *OCSP_sendreq_bio(BIO *b, char *path, OCSP_REQUEST *req){	BIO *mem = NULL;	char tmpbuf[1024];	OCSP_RESPONSE *resp = NULL;	char *p, *q, *r;	int len, retcode;	static char req_txt[] ="POST %s HTTP/1.0\r\n\Content-Type: application/ocsp-request\r\n\Content-Length: %d\r\n\r\n";	len = i2d_OCSP_REQUEST(req, NULL);	if(BIO_printf(b, req_txt, path, len) < 0) {		OCSPerr(OCSP_F_OCSP_SENDREQ_BIO,OCSP_R_SERVER_WRITE_ERROR);		goto err;	}	if(i2d_OCSP_REQUEST_bio(b, req) <= 0) {		OCSPerr(OCSP_F_OCSP_SENDREQ_BIO,OCSP_R_SERVER_WRITE_ERROR);		goto err;	}	if(!(mem = BIO_new(BIO_s_mem()))) goto err;	/* Copy response to a memory BIO: socket bios can't do gets! */	while ((len = BIO_read(b, tmpbuf, 1024))) {		if(len < 0) {			OCSPerr(OCSP_F_OCSP_SENDREQ_BIO,OCSP_R_SERVER_READ_ERROR);			goto err;		}		BIO_write(mem, tmpbuf, len);	}	if(BIO_gets(mem, tmpbuf, 512) <= 0) {		OCSPerr(OCSP_F_OCSP_SENDREQ_BIO,OCSP_R_SERVER_RESPONSE_PARSE_ERROR);		goto err;	}	/* Parse the HTTP response. This will look like this:	 * "HTTP/1.0 200 OK". We need to obtain the numeric code and         * informational message.	 */	/* Skip to first white space (passed protocol info) */	for(p = tmpbuf; *p && !isspace((unsigned char)*p); p++) continue;	if(!*p) {		OCSPerr(OCSP_F_OCSP_SENDREQ_BIO,OCSP_R_SERVER_RESPONSE_PARSE_ERROR);		goto err;	}	/* Skip past white space to start of response code */	while(*p && isspace((unsigned char)*p)) p++;	if(!*p) {		OCSPerr(OCSP_F_OCSP_SENDREQ_BIO,OCSP_R_SERVER_RESPONSE_PARSE_ERROR);		goto err;	}	/* Find end of response code: first whitespace after start of code */	for(q = p; *q && !isspace((unsigned char)*q); q++) continue;	if(!*q) {		OCSPerr(OCSP_F_OCSP_SENDREQ_BIO,OCSP_R_SERVER_RESPONSE_PARSE_ERROR);		goto err;	}	/* Set end of response code and start of message */ 	*q++ = 0;	/* Attempt to parse numeric code */	retcode = strtoul(p, &r, 10);	if(*r) goto err;	/* Skip over any leading white space in message */	while(*q && isspace((unsigned char)*q))  q++;	if(!*q) goto err;	/* Finally zap any trailing white space in message (include CRLF) */	/* We know q has a non white space character so this is OK */	for(r = q + strlen(q) - 1; isspace((unsigned char)*r); r--) *r = 0;	if(retcode != 200) {		OCSPerr(OCSP_F_OCSP_SENDREQ_BIO,OCSP_R_SERVER_RESPONSE_ERROR);		ERR_add_error_data(4, "Code=", p, ",Reason=", q);		goto err;	}	/* Find blank line marking beginning of content */		while(BIO_gets(mem, tmpbuf, 512) > 0)	{		for(p = tmpbuf; *p && isspace((unsigned char)*p); p++) continue;		if(!*p) break;	}	if(*p) {		OCSPerr(OCSP_F_OCSP_SENDREQ_BIO,OCSP_R_NO_CONTENT);		goto err;	}	if(!(resp = d2i_OCSP_RESPONSE_bio(mem, NULL))) {		OCSPerr(OCSP_F_OCSP_SENDREQ_BIO,ERR_R_NESTED_ASN1_ERROR);		goto err;	}	err:	BIO_free(mem);	return resp;}