/**
* Reads the value of the extension given by OID or name as defined in section 4.2 of RFC 2459.
*
* @param extensionOidOrName OID or extension name, e.g. 2.5.29.14 orSubjectK eyIdentifier. In the
* case of extension name, the name is case-sensitive and follows the conventions in RFC 2459.
* @return Extension type containing data from requested extension field.
*/
public ASN1Encodable read(final String extensionOidOrName) {
if (extensionOidOrName == null) {
throw new IllegalArgumentException("extensionOidOrName cannot be null.");
}
if (extensionOidOrName.contains(".")) {
return read(ExtensionType.fromOid(extensionOidOrName));
} else {
return read(ExtensionType.fromName(extensionOidOrName));
}
}
/**
* Reads the value of the given certificate extension field.
*
* @param extension Extension to read from certificate.
* @return Extension type containing data from requested extension field.
*/
public ASN1Encodable read(final ExtensionType extension) {
byte[] data = certificate.getExtensionValue(extension.getOid());
if (data == null) {
return null;
}
try {
ASN1Encodable der = ASN1Primitive.fromByteArray(data);
if (der instanceof ASN1OctetString) {
// Strip off octet string "wrapper"
data = ((ASN1OctetString) der).getOctets();
der = ASN1Primitive.fromByteArray(data);
}
return der;
} catch (IOException e) {
throw new IllegalArgumentException("IO exception parsing ASN.1 data", e);
}
}
