public static KeyStore buildKeyStore() {
if (keystore == null) {
File keyStoreFile = new File(KEY_STORE_FILENAME);
if (keyStoreFile.exists()) {
loadKeyStore(keyStoreFile);
} else {
dynamicallyCreateKeyStore();
saveKeyStore();
}
}
return keystore;
}
private static void saveKeyStore() {
try {
ByteArrayOutputStream bout = new ByteArrayOutputStream();
keystore.store(bout, KEY_STORE_PASSWORD.toCharArray());
File keyStoreFile = new File(KEY_STORE_FILENAME);
logger.trace("Saving key store to file [" + keyStoreFile + "]");
FileOutputStream fileOutputStream = null;
try {
fileOutputStream = new FileOutputStream(keyStoreFile);
fileOutputStream.write(bout.toByteArray());
} finally {
if (fileOutputStream != null) {
fileOutputStream.close();
}
}
keyStoreFile.deleteOnExit();
} catch (Exception e) {
throw new RuntimeException("Exception while saving KeyStore", e);
}
}
private static void loadKeyStore(File keyStoreFile) {
try {
FileInputStream fileInputStream = null;
try {
fileInputStream = new FileInputStream(KEY_STORE_FILENAME);
logger.trace("Loading key store from file [" + keyStoreFile + "]");
keystore = KeyStore.getInstance(KeyStore.getDefaultType());
keystore.load(fileInputStream, KEY_STORE_PASSWORD.toCharArray());
} finally {
if (fileInputStream != null) {
fileInputStream.close();
}
}
} catch (Exception e) {
throw new RuntimeException(
"Exception while loading KeyStore from " + keyStoreFile.getAbsolutePath(), e);
}
}