i2d_OCSP_RESPONSE
BIO_printf(cbio, http_resp, i2d_OCSP_RESPONSE(resp, NULL));
rspderlen = i2d_OCSP_RESPONSE(resp, &rspder);
PEM_ASN1_write_bio((int (*)())i2d_OCSP_RESPONSE,PEM_STRING_OCSP_RESPONSE,\
int i2d_OCSP_RESPONSE(OCSP_RESPONSE *a, unsigned char **out);