private KeyStore createKeyStore(@Nullable String path)
throws IOException, KeyStoreException, NoSuchAlgorithmException, CertificateException {
String keyStoreType = KeyStore.getDefaultType();
char[] defaultPassword = "******".toCharArray();
if (path != null) {
// If the user provided path, only try to load the keystore at that path.
KeyStore keyStore = KeyStore.getInstance(keyStoreType);
FileInputStream is = new FileInputStream(path);
keyStore.load(is, defaultPassword);
return keyStore;
}
try {
// Check if we are on Android.
Class version = Class.forName("android.os.Build$VERSION");
// Build.VERSION_CODES.ICE_CREAM_SANDWICH is 14.
if (version.getDeclaredField("SDK_INT").getInt(version) >= 14) {
// After ICS, Android provided this nice method for loading the keystore,
// so we don't have to specify the location explicitly.
KeyStore keystore = KeyStore.getInstance("AndroidCAStore");
keystore.load(null, null);
return keystore;
} else {
keyStoreType = "BKS";
path =
System.getProperty("java.home")
+ "/etc/security/cacerts.bks".replace('/', File.separatorChar);
}
} catch (ClassNotFoundException e) {
// NOP. android.os.Build is not present, so we are not on Android. Fall through.
} catch (NoSuchFieldException e) {
throw new RuntimeException(e); // Should never happen.
} catch (IllegalAccessException e) {
throw new RuntimeException(e); // Should never happen.
}
if (path == null) {
path = System.getProperty("javax.net.ssl.trustStore");
}
if (path == null) {
// Try this default system location for Linux/Windows/OSX.
path =
System.getProperty("java.home")
+ "/lib/security/cacerts".replace('/', File.separatorChar);
}
try {
KeyStore keyStore = KeyStore.getInstance(keyStoreType);
FileInputStream is = new FileInputStream(path);
keyStore.load(is, defaultPassword);
return keyStore;
} catch (FileNotFoundException e) {
// If we failed to find a system trust store, load our own fallback trust store. This can fail
// on Android
// but we should never reach it there.
KeyStore keyStore = KeyStore.getInstance("JKS");
InputStream is = getClass().getResourceAsStream("cacerts");
keyStore.load(is, defaultPassword);
return keyStore;
}
}
/** This should always be called before attempting to call sendPayment. */
public boolean isExpired() {
return paymentDetails.hasExpires()
&& System.currentTimeMillis() / 1000L > paymentDetails.getExpires();
}