refactor ConfigHelper, split into multiple helper classes

1 files changed, 0 insertions, 445 deletions

diff --git a/app/src/main/java/se/leap/bitmaskclient/ConfigHelper.java b/app/src/main/java/se/leap/bitmaskclient/ConfigHelper.java
deleted file mode 100644
index aaff9ebc..00000000
--- a/app/src/main/java/se/leap/bitmaskclient/ConfigHelper.java
+++ /dev/null
@@ -1,445 +0,0 @@
-/**
- * Copyright (c) 2013 LEAP Encryption Access Project and contributers
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-package se.leap.bitmaskclient;
-
-import android.content.Context;
-import android.content.SharedPreferences;
-import android.preference.PreferenceManager;
-import android.support.annotation.NonNull;
-import android.support.annotation.Nullable;
-import android.util.Log;
-
-import org.json.JSONException;
-import org.json.JSONObject;
-import org.spongycastle.util.encoders.Base64;
-
-import java.io.BufferedReader;
-import java.io.ByteArrayInputStream;
-import java.io.FileInputStream;
-import java.io.FileNotFoundException;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.InputStreamReader;
-import java.math.BigInteger;
-import java.net.MalformedURLException;
-import java.net.URL;
-import java.security.KeyFactory;
-import java.security.KeyStore;
-import java.security.KeyStoreException;
-import java.security.MessageDigest;
-import java.security.NoSuchAlgorithmException;
-import java.security.NoSuchProviderException;
-import java.security.cert.CertificateEncodingException;
-import java.security.cert.CertificateException;
-import java.security.cert.CertificateFactory;
-import java.security.cert.X509Certificate;
-import java.security.interfaces.RSAPrivateKey;
-import java.security.spec.InvalidKeySpecException;
-import java.security.spec.PKCS8EncodedKeySpec;
-import java.util.ArrayList;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Locale;
-import java.util.Map;
-import java.util.Set;
-
-import static android.R.attr.name;
-import static se.leap.bitmaskclient.Constants.ALWAYS_ON_SHOW_DIALOG;
-import static se.leap.bitmaskclient.Constants.DEFAULT_SHARED_PREFS_BATTERY_SAVER;
-import static se.leap.bitmaskclient.Constants.PREFERENCES_APP_VERSION;
-import static se.leap.bitmaskclient.Constants.PROVIDER_CONFIGURED;
-import static se.leap.bitmaskclient.Constants.PROVIDER_EIP_DEFINITION;
-import static se.leap.bitmaskclient.Constants.PROVIDER_PRIVATE_KEY;
-import static se.leap.bitmaskclient.Constants.PROVIDER_VPN_CERTIFICATE;
-import static se.leap.bitmaskclient.Constants.SHARED_PREFERENCES;
-
-/**
- * Stores constants, and implements auxiliary methods used across all Bitmask Android classes.
- *
- * @author parmegv
- * @author MeanderingCode
- */
-public class ConfigHelper {
-    private static final String TAG = ConfigHelper.class.getName();
-    private static KeyStore keystore_trusted;
-
-    final public static String NG_1024 =
-            "eeaf0ab9adb38dd69c33f80afa8fc5e86072618775ff3c0b9ea2314c9c256576d674df7496ea81d3383b4813d692c6e0e0d5d8e250b98be48e495c1d6089dad15dc7d7b46154d6b6ce8ef4ad69b15d4982559b297bcf1885c529f566660e57ec68edbc3c05726cc02fd4cbf4976eaa9afd5138fe8376435b9fc61d2fc0eb06e3";
-    final public static BigInteger G = new BigInteger("2");
-
-    public static boolean checkErroneousDownload(String downloadedString) {
-        try {
-            if (downloadedString == null || downloadedString.isEmpty() || new JSONObject(downloadedString).has(ProviderAPI.ERRORS) || new JSONObject(downloadedString).has(ProviderAPI.BACKEND_ERROR_KEY)) {
-                return true;
-            } else {
-                return false;
-            }
-        } catch (NullPointerException | JSONException e) {
-            return false;
-        }
-    }
-
-    /**
-     * Treat the input as the MSB representation of a number,
-     * and lop off leading zero elements.  For efficiency, the
-     * input is simply returned if no leading zeroes are found.
-     *
-     * @param in array to be trimmed
-     */
-    public static byte[] trim(byte[] in) {
-        if (in.length == 0 || in[0] != 0)
-            return in;
-
-        int len = in.length;
-        int i = 1;
-        while (in[i] == 0 && i < len)
-            ++i;
-        byte[] ret = new byte[len - i];
-        System.arraycopy(in, i, ret, 0, len - i);
-        return ret;
-    }
-
-    public static X509Certificate parseX509CertificateFromString(String certificateString) {
-        java.security.cert.Certificate certificate = null;
-        CertificateFactory cf;
-        try {
-            cf = CertificateFactory.getInstance("X.509");
-
-            certificateString = certificateString.replaceFirst("-----BEGIN CERTIFICATE-----", "").replaceFirst("-----END CERTIFICATE-----", "").trim();
-            byte[] cert_bytes = Base64.decode(certificateString);
-            InputStream caInput = new ByteArrayInputStream(cert_bytes);
-            try {
-                certificate = cf.generateCertificate(caInput);
-                System.out.println("ca=" + ((X509Certificate) certificate).getSubjectDN());
-            } finally {
-                caInput.close();
-            }
-        } catch (NullPointerException | CertificateException | IOException | IllegalArgumentException e) {
-            return null;
-        }
-        return (X509Certificate) certificate;
-    }
-
-    public static String loadInputStreamAsString(java.io.InputStream is) {
-        java.util.Scanner s = new java.util.Scanner(is).useDelimiter("\\A");
-        return s.hasNext() ? s.next() : "";
-    }
-
-    //allows us to mock FileInputStream
-    public static InputStream getInputStreamFrom(String filePath) throws FileNotFoundException {
-        return new FileInputStream(filePath);
-    }
-
-    protected static RSAPrivateKey parseRsaKeyFromString(String rsaKeyString) {
-        RSAPrivateKey key;
-        try {
-            KeyFactory kf = KeyFactory.getInstance("RSA", "BC");
-            rsaKeyString = rsaKeyString.replaceFirst("-----BEGIN RSA PRIVATE KEY-----", "").replaceFirst("-----END RSA PRIVATE KEY-----", "");
-            PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(Base64.decode(rsaKeyString));
-            key = (RSAPrivateKey) kf.generatePrivate(keySpec);
-        } catch (InvalidKeySpecException e) {
-            // TODO Auto-generated catch block
-            e.printStackTrace();
-            return null;
-        } catch (NoSuchAlgorithmException e) {
-            // TODO Auto-generated catch block
-            e.printStackTrace();
-            return null;
-        } catch (NoSuchProviderException e) {
-            // TODO Auto-generated catch block
-            e.printStackTrace();
-            return null;
-        } catch (NullPointerException e) {
-            e.printStackTrace();
-            return null;
-        }
-
-        return key;
-    }
-
-    private static String byteArrayToHex(byte[] input) {
-        int readBytes = input.length;
-        StringBuffer hexData = new StringBuffer();
-        int onebyte;
-        for (int i = 0; i < readBytes; i++) {
-            onebyte = ((0x000000ff & input[i]) | 0xffffff00);
-            hexData.append(Integer.toHexString(onebyte).substring(6));
-        }
-        return hexData.toString();
-    }
-
-    /**
-     * Calculates the hexadecimal representation of a sha256/sha1 fingerprint of a certificate
-     *
-     * @param certificate
-     * @param encoding
-     * @return
-     * @throws NoSuchAlgorithmException
-     * @throws CertificateEncodingException
-     */
-    @NonNull
-    public static String getFingerprintFromCertificate(X509Certificate certificate, String encoding) throws NoSuchAlgorithmException, CertificateEncodingException /*, UnsupportedEncodingException*/ {
-        byte[] byteArray = MessageDigest.getInstance(encoding).digest(certificate.getEncoded());
-        return byteArrayToHex(byteArray);
-    }
-    
-    /**
-     * Adds a new X509 certificate given its input stream and its provider name
-     *
-     * @param provider    used to store the certificate in the keystore
-     * @param inputStream from which X509 certificate must be generated.
-     */
-    public static void addTrustedCertificate(String provider, InputStream inputStream) {
-        CertificateFactory cf;
-        try {
-            cf = CertificateFactory.getInstance("X.509");
-            X509Certificate cert =
-                    (X509Certificate) cf.generateCertificate(inputStream);
-            keystore_trusted.setCertificateEntry(provider, cert);
-        } catch (CertificateException e) {
-            // TODO Auto-generated catch block
-            e.printStackTrace();
-        } catch (KeyStoreException e) {
-            // TODO Auto-generated catch block
-            e.printStackTrace();
-        }
-    }
-
-    /**
-     * Adds a new X509 certificate given in its string from and using its provider name
-     *
-     * @param provider    used to store the certificate in the keystore
-     * @param certificate
-     */
-    public static void addTrustedCertificate(String provider, String certificate) {
-
-        try {
-            X509Certificate cert = ConfigHelper.parseX509CertificateFromString(certificate);
-            if (keystore_trusted == null) {
-                keystore_trusted = KeyStore.getInstance("BKS");
-                keystore_trusted.load(null);
-            }
-            keystore_trusted.setCertificateEntry(provider, cert);
-        } catch (KeyStoreException e) {
-            // TODO Auto-generated catch block
-            e.printStackTrace();
-        } catch (NoSuchAlgorithmException e) {
-            // TODO Auto-generated catch block
-            e.printStackTrace();
-        } catch (CertificateException e) {
-            // TODO Auto-generated catch block
-            e.printStackTrace();
-        } catch (IOException e) {
-            // TODO Auto-generated catch block
-            e.printStackTrace();
-        }
-    }
-
-    /**
-     * @return class wide keystore
-     */
-    public static KeyStore getKeystore() {
-        return keystore_trusted;
-    }
-
-
-    public static boolean providerInSharedPreferences(@NonNull SharedPreferences preferences) {
-        return preferences.getBoolean(PROVIDER_CONFIGURED, false);
-    }
-
-    public static Provider getSavedProviderFromSharedPreferences(@NonNull SharedPreferences preferences) {
-        Provider provider = new Provider();
-        try {
-            provider.setMainUrl(new URL(preferences.getString(Provider.MAIN_URL, "")));
-            provider.define(new JSONObject(preferences.getString(Provider.KEY, "")));
-            provider.setCaCert(preferences.getString(Provider.CA_CERT, ""));
-            provider.setVpnCertificate(preferences.getString(PROVIDER_VPN_CERTIFICATE, ""));
-            provider.setPrivateKey(preferences.getString(PROVIDER_PRIVATE_KEY, ""));
-            provider.setEipServiceJson(new JSONObject(preferences.getString(PROVIDER_EIP_DEFINITION, "")));
-        } catch (MalformedURLException | JSONException e) {
-            e.printStackTrace();
-        }
-
-        return provider;
-    }
-
-    public static String getFromPersistedProvider(String toFetch, String providerDomain, SharedPreferences preferences) {
-        return preferences.getString(toFetch + "." + providerDomain, "");
-    }
-
-    public static String getProviderName(String provider) {
-        return getProviderName(null, provider);
-    }
-
-    public static String getProviderName(@Nullable SharedPreferences preferences) {
-        return getProviderName(preferences,null);
-    }
-
-    public static String getProviderName(@Nullable SharedPreferences preferences, @Nullable String provider) {
-        if (provider == null && preferences != null) {
-            provider = preferences.getString(Provider.KEY, "");
-        }
-        try {
-            JSONObject providerJson = new JSONObject(provider);
-            String lang = Locale.getDefault().getLanguage();
-            return providerJson.getJSONObject(Provider.NAME).getString(lang);
-        } catch (JSONException e) {
-            try {
-                JSONObject providerJson = new JSONObject(provider);
-                return providerJson.getJSONObject(Provider.NAME).getString("en");
-            } catch (JSONException e2) {
-                return null;
-            }
-        } catch (NullPointerException npe) {
-            return null;
-        }
-    }
-
-    public static String getProviderDomain(SharedPreferences preferences) {
-        return getProviderDomain(preferences, null);
-    }
-
-    public static String getProviderDomain(String provider) {
-        return getProviderDomain(null, provider);
-    }
-
-    public static String getProviderDomain(@Nullable SharedPreferences preferences, @Nullable String provider) {
-        if (provider == null && preferences != null) {
-            provider = preferences.getString(Provider.KEY, "");
-        }
-        try {
-            JSONObject providerJson = new JSONObject(provider);
-            return providerJson.getString(Provider.DOMAIN);
-        } catch (JSONException | NullPointerException e) {
-            return null;
-        }
-    }
-
-    public static String getDescription(SharedPreferences preferences) {
-        try {
-            JSONObject providerJson = new JSONObject(preferences.getString(Provider.KEY, ""));
-            String lang = Locale.getDefault().getLanguage();
-            return providerJson.getJSONObject(Provider.DESCRIPTION).getString(lang);
-        } catch (JSONException e) {
-            try {
-                JSONObject providerJson = new JSONObject(preferences.getString(Provider.KEY, ""));
-                return providerJson.getJSONObject(Provider.DESCRIPTION).getString("en");
-            } catch (JSONException e1) {
-                return null;
-            }
-        }
-    }
-
-    // TODO: replace commit with apply after refactoring EIP
-    //FIXME: don't save private keys in shared preferences! use the keystore
-    public static void storeProviderInPreferences(SharedPreferences preferences, Provider provider) {
-        preferences.edit().putBoolean(PROVIDER_CONFIGURED, true).
-                putString(Provider.MAIN_URL, provider.getMainUrlString()).
-                putString(Provider.KEY, provider.getDefinitionString()).
-                putString(Provider.CA_CERT, provider.getCaCert()).
-                putString(PROVIDER_EIP_DEFINITION, provider.getEipServiceJsonString()).
-                putString(PROVIDER_PRIVATE_KEY, provider.getPrivateKey()).
-                putString(PROVIDER_VPN_CERTIFICATE, provider.getVpnCertificate()).
-                commit();
-
-        String providerDomain = provider.getDomain();
-        preferences.edit().putBoolean(PROVIDER_CONFIGURED, true).
-                putString(Provider.MAIN_URL + "." + providerDomain, provider.getMainUrlString()).
-                putString(Provider.KEY + "." + providerDomain, provider.getDefinitionString()).
-                putString(Provider.CA_CERT + "." + providerDomain, provider.getCaCert()).
-                putString(PROVIDER_EIP_DEFINITION + "." + providerDomain, provider.getEipServiceJsonString()).
-                apply();
-    }
-
-
-    public static void clearDataOfLastProvider(SharedPreferences preferences) {
-        clearDataOfLastProvider(preferences, false);
-    }
-
-    @Deprecated
-    public static void clearDataOfLastProvider(SharedPreferences preferences, boolean commit) {
-        Map<String, ?> allEntries = preferences.getAll();
-        List<String> lastProvidersKeys = new ArrayList<>();
-        for (Map.Entry<String, ?> entry : allEntries.entrySet()) {
-            //sort out all preferences that don't belong to the last provider
-            if (entry.getKey().startsWith(Provider.KEY + ".") ||
-                    entry.getKey().startsWith(Provider.CA_CERT + ".") ||
-                    entry.getKey().startsWith(Provider.CA_CERT_FINGERPRINT + "." )||
-                    entry.getKey().equals(PREFERENCES_APP_VERSION)
-                    ) {
-                continue;
-            }
-            lastProvidersKeys.add(entry.getKey());
-        }
-
-        SharedPreferences.Editor preferenceEditor = preferences.edit();
-        for (String key : lastProvidersKeys) {
-            preferenceEditor.remove(key);
-        }
-        if (commit) {
-            preferenceEditor.commit();
-        } else {
-            preferenceEditor.apply();
-        }
-    }
-
-    public static void deleteProviderDetailsFromPreferences(@NonNull SharedPreferences preferences, String providerDomain) {
-        preferences.edit().
-                remove(Provider.KEY + "." + providerDomain).
-                remove(Provider.CA_CERT + "." + providerDomain).
-                remove(Provider.CA_CERT_FINGERPRINT + "." + providerDomain).
-                remove(Provider.MAIN_URL + "." + providerDomain).
-                remove(Provider.KEY + "." + providerDomain).
-                remove(Provider.CA_CERT + "." + providerDomain).
-                remove(PROVIDER_EIP_DEFINITION + "." + providerDomain).
-                remove(PROVIDER_PRIVATE_KEY + "." + providerDomain).
-                remove(PROVIDER_VPN_CERTIFICATE + "." + providerDomain).
-                apply();
-    }
-
-    public static void saveBattery(Context context, boolean isEnabled) {
-        if (context == null) {
-            return;
-        }
-        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
-        preferences.edit().putBoolean(DEFAULT_SHARED_PREFS_BATTERY_SAVER, isEnabled).apply();
-    }
-
-    public static boolean getSaveBattery(Context context) {
-        if (context == null) {
-            return false;
-        }
-        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
-        return preferences.getBoolean(DEFAULT_SHARED_PREFS_BATTERY_SAVER, false);
-    }
-
-    public static void saveShowAlwaysOnDialog(Context context, boolean showAlwaysOnDialog) {
-        if (context == null) {
-            return;
-        }
-        SharedPreferences preferences = context.getSharedPreferences(SHARED_PREFERENCES, Context.MODE_PRIVATE);
-        preferences.edit().putBoolean(ALWAYS_ON_SHOW_DIALOG, showAlwaysOnDialog).apply();
-    }
-
-    public static boolean getShowAlwaysOnDialog(Context context) {
-        if (context == null) {
-            return true;
-        }
-        SharedPreferences preferences = context.getSharedPreferences(SHARED_PREFERENCES, Context.MODE_PRIVATE);
-        return preferences.getBoolean(ALWAYS_ON_SHOW_DIALOG, true);
-    }
-}