mobile/android/base/sync/crypto/PersistedCrypto5Keys.java@6474c204b198 (annotated)
mobile/android/base/sync/crypto/PersistedCrypto5Keys.java
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 2 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 3 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 4 | |
| michael@0 | 5 | package org.mozilla.gecko.sync.crypto; |
| michael@0 | 6 | |
| michael@0 | 7 | import org.mozilla.gecko.background.common.log.Logger; |
| michael@0 | 8 | import org.mozilla.gecko.sync.CollectionKeys; |
| michael@0 | 9 | import org.mozilla.gecko.sync.CryptoRecord; |
| michael@0 | 10 | |
| michael@0 | 11 | import android.content.SharedPreferences; |
| michael@0 | 12 | |
| michael@0 | 13 | public class PersistedCrypto5Keys { |
| michael@0 | 14 | public static final String LOG_TAG = "PersistedC5Keys"; |
| michael@0 | 15 | |
| michael@0 | 16 | public static final String CRYPTO5_KEYS_SERVER_RESPONSE_BODY = "crypto5KeysServerResponseBody"; |
| michael@0 | 17 | public static final String CRYPTO5_KEYS_LAST_MODIFIED = "crypto5KeysLastModified"; |
| michael@0 | 18 | |
| michael@0 | 19 | protected SharedPreferences prefs; |
| michael@0 | 20 | protected KeyBundle syncKeyBundle; |
| michael@0 | 21 | |
| michael@0 | 22 | public PersistedCrypto5Keys(SharedPreferences prefs, KeyBundle syncKeyBundle) { |
| michael@0 | 23 | if (syncKeyBundle == null) { |
| michael@0 | 24 | throw new IllegalArgumentException("Null syncKeyBundle passed in to PersistedCrypto5Keys constructor."); |
| michael@0 | 25 | } |
| michael@0 | 26 | this.prefs = prefs; |
| michael@0 | 27 | this.syncKeyBundle = syncKeyBundle; |
| michael@0 | 28 | } |
| michael@0 | 29 | |
| michael@0 | 30 | /** |
| michael@0 | 31 | * Get persisted crypto/keys. |
| michael@0 | 32 | * <p> |
| michael@0 | 33 | * crypto/keys is fetched from an encrypted JSON-encoded <code>CryptoRecord</code>. |
| michael@0 | 34 | * |
| michael@0 | 35 | * @return A <code>CollectionKeys</code> instance or <code>null</code> if none |
| michael@0 | 36 | * is currently persisted. |
| michael@0 | 37 | */ |
| michael@0 | 38 | public CollectionKeys keys() { |
| michael@0 | 39 | String keysJSON = prefs.getString(CRYPTO5_KEYS_SERVER_RESPONSE_BODY, null); |
| michael@0 | 40 | if (keysJSON == null) { |
| michael@0 | 41 | return null; |
| michael@0 | 42 | } |
| michael@0 | 43 | try { |
| michael@0 | 44 | CryptoRecord cryptoRecord = CryptoRecord.fromJSONRecord(keysJSON); |
| michael@0 | 45 | CollectionKeys keys = new CollectionKeys(); |
| michael@0 | 46 | keys.setKeyPairsFromWBO(cryptoRecord, syncKeyBundle); |
| michael@0 | 47 | return keys; |
| michael@0 | 48 | } catch (Exception e) { |
| michael@0 | 49 | Logger.warn(LOG_TAG, "Got exception decrypting persisted crypto/keys.", e); |
| michael@0 | 50 | return null; |
| michael@0 | 51 | } |
| michael@0 | 52 | } |
| michael@0 | 53 | |
| michael@0 | 54 | /** |
| michael@0 | 55 | * Persist crypto/keys. |
| michael@0 | 56 | * <p> |
| michael@0 | 57 | * crypto/keys is stored as an encrypted JSON-encoded <code>CryptoRecord</code>. |
| michael@0 | 58 | * |
| michael@0 | 59 | * @param keys |
| michael@0 | 60 | * The <code>CollectionKeys</code> object to persist, which should |
| michael@0 | 61 | * have the same default key bundle as the sync key bundle. |
| michael@0 | 62 | */ |
| michael@0 | 63 | public void persistKeys(CollectionKeys keys) { |
| michael@0 | 64 | if (keys == null) { |
| michael@0 | 65 | Logger.debug(LOG_TAG, "Clearing persisted crypto/keys."); |
| michael@0 | 66 | prefs.edit().remove(CRYPTO5_KEYS_SERVER_RESPONSE_BODY).commit(); |
| michael@0 | 67 | return; |
| michael@0 | 68 | } |
| michael@0 | 69 | try { |
| michael@0 | 70 | CryptoRecord cryptoRecord = keys.asCryptoRecord(); |
| michael@0 | 71 | cryptoRecord.keyBundle = syncKeyBundle; |
| michael@0 | 72 | cryptoRecord.encrypt(); |
| michael@0 | 73 | String keysJSON = cryptoRecord.toJSONString(); |
| michael@0 | 74 | Logger.debug(LOG_TAG, "Persisting crypto/keys."); |
| michael@0 | 75 | prefs.edit().putString(CRYPTO5_KEYS_SERVER_RESPONSE_BODY, keysJSON).commit(); |
| michael@0 | 76 | } catch (Exception e) { |
| michael@0 | 77 | Logger.warn(LOG_TAG, "Got exception encrypting while persisting crypto/keys.", e); |
| michael@0 | 78 | } |
| michael@0 | 79 | } |
| michael@0 | 80 | |
| michael@0 | 81 | public boolean persistedKeysExist() { |
| michael@0 | 82 | return lastModified() > 0; |
| michael@0 | 83 | } |
| michael@0 | 84 | |
| michael@0 | 85 | public long lastModified() { |
| michael@0 | 86 | return prefs.getLong(CRYPTO5_KEYS_LAST_MODIFIED, -1); |
| michael@0 | 87 | } |
| michael@0 | 88 | |
| michael@0 | 89 | public void persistLastModified(long lastModified) { |
| michael@0 | 90 | if (lastModified <= 0) { |
| michael@0 | 91 | Logger.debug(LOG_TAG, "Clearing persisted crypto/keys last modified timestamp."); |
| michael@0 | 92 | prefs.edit().remove(CRYPTO5_KEYS_LAST_MODIFIED).commit(); |
| michael@0 | 93 | return; |
| michael@0 | 94 | } |
| michael@0 | 95 | Logger.debug(LOG_TAG, "Persisting crypto/keys last modified timestamp " + lastModified + "."); |
| michael@0 | 96 | prefs.edit().putLong(CRYPTO5_KEYS_LAST_MODIFIED, lastModified).commit(); |
| michael@0 | 97 | } |
| michael@0 | 98 | |
| michael@0 | 99 | public void purge() { |
| michael@0 | 100 | persistLastModified(-1); |
| michael@0 | 101 | persistKeys(null); |
| michael@0 | 102 | } |
| michael@0 | 103 | } |
