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package org.uic.barcode.utils;
import java.security.Provider;
import java.security.Provider.Service;
import java.security.Security;
public class AlgorithmNameResolver {
public static final String TYPE_KEY_GENERATOR_ALG = "KeyPairGenerator";
public static final String TYPE_SIGNATURE_ALG = "Signature";
public static String getSignatureAlgorithmName (String oid) throws Exception {
Provider[] provs = Security.getProviders();
for (Provider prov : provs) {
Service service = prov.getService(AlgorithmNameResolver.TYPE_SIGNATURE_ALG,oid);
if (service != null) {
return service.getAlgorithm();
}
}
return null;
}
public static String getSignatureAlgorithmName (String oid, Provider provider) throws Exception {
if (provider != null) {
Service service = provider.getService(AlgorithmNameResolver.TYPE_SIGNATURE_ALG,oid);
return service.getAlgorithm();
}
Provider[] provs = Security.getProviders();
for (Provider prov : provs) {
Service service = prov.getService(AlgorithmNameResolver.TYPE_SIGNATURE_ALG,oid);
if (service != null) {
return service.getAlgorithm();
}
}
return null;
}
public static String getName (String type, String oid) throws Exception {
Provider[] provs = Security.getProviders();
for (Provider prov : provs) {
Service service = prov.getService(type,oid);
if (service != null) {
return service.getAlgorithm();
}
}
if (oid.startsWith("1.2.840.10045")) {
return "ECDSA";
} else if (oid.startsWith("1.2.840.10040")) {
return "DSA";
}
return null;
}
public static String getName(String type, String oid, Provider provider) throws Exception {
Service service = null;
if (provider == null) {
Provider[] provs = Security.getProviders();
for (Provider prov : provs) {
service = prov.getService(type,oid);
}
} else {
service = provider.getService(type,oid);
}
if (service != null) {
return service.getAlgorithm();
}
if (oid.startsWith("1.2.840.10045")) {
return "ECDSA";
} else if (oid.startsWith("1.2.840.10040")) {
return "DSA";
}
return null;
}
}
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