/** Creates the certificate from the KeyInfo element. */
public static X509Credential loadCredentialFromSignature(Signature signature)
throws RelyingPartyException {
X509Credential credential = null;
KeyInfo kinfo = signature.getKeyInfo();
List<X509Data> dataList = null;
List<KeyValue> keyValueList = null;
if (kinfo == null) {
return null;
}
try {
dataList = kinfo.getX509Datas();
keyValueList = kinfo.getKeyValues();
if (dataList.size() > 0) {
if (dataList.size() > 1) {
throw new RelyingPartyException("invalidKeyValueCount");
}
X509Data data = dataList.get(0);
List<X509Certificate> certList = data.getX509Certificates();
Iterator<X509Certificate> certIterator = certList.iterator();
while (certIterator.hasNext()) {
X509Certificate certElem = null;
String certValue = null;
byte[] certInBytes = null;
ByteArrayInputStream inputStream = null;
CertificateFactory factory = null;
java.security.cert.X509Certificate x509Cert = null;
certElem = (X509Certificate) certIterator.next();
certValue = certElem.getValue();
certInBytes = Base64.decode(certValue);
inputStream = new ByteArrayInputStream(certInBytes);
factory = CertificateFactory.getInstance("X509");
x509Cert = (java.security.cert.X509Certificate) factory.generateCertificate(inputStream);
credential = new X509CredentialImpl(x509Cert);
}
} else if (keyValueList.size() > 0) {
if (keyValueList.size() > 1) {
throw new RelyingPartyException("invalidKeyValueCount");
}
KeyValue val = null;
RSAKeyValue rsaKey = null;
Element modElem = null;
Element expElem = null;
Element elem = null;
OMElement omElem = null;
BigInteger mod = null;
BigInteger exp = null;
val = (KeyValue) keyValueList.get(0);
rsaKey = val.getRSAKeyValue();
elem = rsaKey.getDOM();
omElem = (OMElement) new OMDOMFactory().getDocument().importNode(elem, true);
modElem = (Element) omElem.getFirstChildWithName(Modulus.DEFAULT_ELEMENT_NAME);
expElem = (Element) omElem.getFirstChildWithName(Exponent.DEFAULT_ELEMENT_NAME);
mod = Base64.decodeBigIntegerFromElement(modElem);
if (expElem != null) {
exp = Base64.decodeBigIntegerFromElement(expElem);
} else {
exp = DEFAULT_EXPONENET;
}
credential = new X509CredentialImpl(mod, exp);
} else {
if (log.isDebugEnabled()) {
log.debug("unknown key info");
}
}
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
log.error("Error while loading credentials from signature", e);
throw new RelyingPartyException("Error while loading credentials from signature", e);
}
return credential;
}
