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package org.openslx.dozmod.authentication;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Base64;
import java.util.Properties;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.openslx.dozmod.Config;
public class FingerprintManager {
private static final Logger LOGGER = LogManager.getLogger(FingerprintManager.class);
private static final File file = new File(Config.getPath(), "fingerprints.properties");
private static final Properties prop = new Properties();
static {
if (file.exists()) {
try {
prop.load(new FileInputStream(file));
} catch (IOException e) {
LOGGER.warn("Could not load cached fingerprints from " + file.toString());
}
}
}
public static void saveKnownFingerprint(String address, byte[] fingerprint) {
if (saveFingerprint(address, fingerprint, true)) {
store();
}
}
public static void saveSuggestedFingerprint(String address, byte[] fingerprint) {
saveFingerprint(address, fingerprint, false);
prop.setProperty(address + "_master", Base64.getEncoder().encodeToString(fingerprint));
store();
}
private static boolean saveFingerprint(String address, byte[] fingerprint, boolean replace) {
if (replace || !prop.containsKey(address)) {
prop.setProperty(address, Base64.getEncoder().encodeToString(fingerprint));
return true;
}
return false;
}
private static void store() {
try {
prop.store(new FileOutputStream(file), "Written by bwLehrstuhl");
} catch (IOException e) {
LOGGER.warn("Could not store fingerprint");
}
}
/**
* Get the fingerprint we accepted previously for this address.
*
* @param address
* @return fingerprint, null if unknown
*/
public static byte[] getKnownFingerprint(String address) {
return Base64.getDecoder().decode(prop.getProperty(address));
}
/**
* Get the fingerprint the master server suggests should be
* the one for the given address.
*
* @param address
* @return fingerprint, null if unknown
*/
public static byte[] getSuggestedFingerprint(String address) {
return Base64.getDecoder().decode(prop.getProperty(address + "_master"));
}
}
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