find_extension
e = find_extension(cert, &asn1_oid_id_pkix_pe_proxyCertInfo, &i);
if (find_extension(c, &asn1_oid_id_x509_ce_subjectAltName, &j)) {
if (find_extension(c, &asn1_oid_id_x509_ce_issuerAltName, &j)) {
e = find_extension(cert, &asn1_oid_id_x509_ce_keyUsage, &i);
e = find_extension(subject, &asn1_oid_id_x509_ce_authorityKeyIdentifier, &i);
e = find_extension(issuer, &asn1_oid_id_x509_ce_subjectKeyIdentifier, &i);
e = find_extension(subject, &asn1_oid_id_x509_ce_nameConstraints, &i);
e = find_extension(cert, &asn1_oid_id_x509_ce_subjectAltName, i);
e = find_extension(cert, &asn1_oid_id_x509_ce_extKeyUsage, &i);
e = find_extension(cert, &asn1_oid_id_x509_ce_keyUsage, &i);
e = find_extension(cert, &asn1_oid_id_x509_ce_basicConstraints, &i);