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);
}
