static Instance getInstance(String type, Class<?> clazz, String algorithm, String provider)
throws NoSuchAlgorithmException, NoSuchProviderException {
Service s = GetInstance.getService(type, algorithm, provider);
Exception ve = getVerificationResult(s.getProvider());
if (ve != null) {
String msg = "JCE cannot authenticate the provider " + provider;
throw (NoSuchProviderException) new NoSuchProviderException(msg).initCause(ve);
}
return GetInstance.getInstance(s, clazz);
}
static Instance getInstance(String type, Class<?> clazz, String algorithm, Provider provider)
throws NoSuchAlgorithmException {
Service s = GetInstance.getService(type, algorithm, provider);
Exception ve = JceSecurity.getVerificationResult(provider);
if (ve != null) {
String msg = "JCE cannot authenticate the provider " + provider.getName();
throw new SecurityException(msg, ve);
}
return GetInstance.getInstance(s, clazz);
}
static Instance getInstance(String type, Class<?> clazz, String algorithm)
throws NoSuchAlgorithmException {
List<Service> services = GetInstance.getServices(type, algorithm);
NoSuchAlgorithmException failure = null;
for (Service s : services) {
if (canUseProvider(s.getProvider()) == false) {
// allow only signed providers
continue;
}
try {
Instance instance = GetInstance.getInstance(s, clazz);
return instance;
} catch (NoSuchAlgorithmException e) {
failure = e;
}
}
throw new NoSuchAlgorithmException("Algorithm " + algorithm + " not available", failure);
}