The Tor Browser / file comparison
comparison: mobile/android/base/sync/crypto/PersistedCrypto5Keys.java
mobile/android/base/sync/crypto/PersistedCrypto5Keys.java
- changeset 0
- 6474c204b198
equal
deleted
inserted
replaced
| -1:000000000000 | 0:14e6d583673a |
|---|---|
| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 package org.mozilla.gecko.sync.crypto; | |
| 6 | |
| 7 import org.mozilla.gecko.background.common.log.Logger; | |
| 8 import org.mozilla.gecko.sync.CollectionKeys; | |
| 9 import org.mozilla.gecko.sync.CryptoRecord; | |
| 10 | |
| 11 import android.content.SharedPreferences; | |
| 12 | |
| 13 public class PersistedCrypto5Keys { | |
| 14 public static final String LOG_TAG = "PersistedC5Keys"; | |
| 15 | |
| 16 public static final String CRYPTO5_KEYS_SERVER_RESPONSE_BODY = "crypto5KeysServerResponseBody"; | |
| 17 public static final String CRYPTO5_KEYS_LAST_MODIFIED = "crypto5KeysLastModified"; | |
| 18 | |
| 19 protected SharedPreferences prefs; | |
| 20 protected KeyBundle syncKeyBundle; | |
| 21 | |
| 22 public PersistedCrypto5Keys(SharedPreferences prefs, KeyBundle syncKeyBundle) { | |
| 23 if (syncKeyBundle == null) { | |
| 24 throw new IllegalArgumentException("Null syncKeyBundle passed in to PersistedCrypto5Keys constructor."); | |
| 25 } | |
| 26 this.prefs = prefs; | |
| 27 this.syncKeyBundle = syncKeyBundle; | |
| 28 } | |
| 29 | |
| 30 /** | |
| 31 * Get persisted crypto/keys. | |
| 32 * <p> | |
| 33 * crypto/keys is fetched from an encrypted JSON-encoded <code>CryptoRecord</code>. | |
| 34 * | |
| 35 * @return A <code>CollectionKeys</code> instance or <code>null</code> if none | |
| 36 * is currently persisted. | |
| 37 */ | |
| 38 public CollectionKeys keys() { | |
| 39 String keysJSON = prefs.getString(CRYPTO5_KEYS_SERVER_RESPONSE_BODY, null); | |
| 40 if (keysJSON == null) { | |
| 41 return null; | |
| 42 } | |
| 43 try { | |
| 44 CryptoRecord cryptoRecord = CryptoRecord.fromJSONRecord(keysJSON); | |
| 45 CollectionKeys keys = new CollectionKeys(); | |
| 46 keys.setKeyPairsFromWBO(cryptoRecord, syncKeyBundle); | |
| 47 return keys; | |
| 48 } catch (Exception e) { | |
| 49 Logger.warn(LOG_TAG, "Got exception decrypting persisted crypto/keys.", e); | |
| 50 return null; | |
| 51 } | |
| 52 } | |
| 53 | |
| 54 /** | |
| 55 * Persist crypto/keys. | |
| 56 * <p> | |
| 57 * crypto/keys is stored as an encrypted JSON-encoded <code>CryptoRecord</code>. | |
| 58 * | |
| 59 * @param keys | |
| 60 * The <code>CollectionKeys</code> object to persist, which should | |
| 61 * have the same default key bundle as the sync key bundle. | |
| 62 */ | |
| 63 public void persistKeys(CollectionKeys keys) { | |
| 64 if (keys == null) { | |
| 65 Logger.debug(LOG_TAG, "Clearing persisted crypto/keys."); | |
| 66 prefs.edit().remove(CRYPTO5_KEYS_SERVER_RESPONSE_BODY).commit(); | |
| 67 return; | |
| 68 } | |
| 69 try { | |
| 70 CryptoRecord cryptoRecord = keys.asCryptoRecord(); | |
| 71 cryptoRecord.keyBundle = syncKeyBundle; | |
| 72 cryptoRecord.encrypt(); | |
| 73 String keysJSON = cryptoRecord.toJSONString(); | |
| 74 Logger.debug(LOG_TAG, "Persisting crypto/keys."); | |
| 75 prefs.edit().putString(CRYPTO5_KEYS_SERVER_RESPONSE_BODY, keysJSON).commit(); | |
| 76 } catch (Exception e) { | |
| 77 Logger.warn(LOG_TAG, "Got exception encrypting while persisting crypto/keys.", e); | |
| 78 } | |
| 79 } | |
| 80 | |
| 81 public boolean persistedKeysExist() { | |
| 82 return lastModified() > 0; | |
| 83 } | |
| 84 | |
| 85 public long lastModified() { | |
| 86 return prefs.getLong(CRYPTO5_KEYS_LAST_MODIFIED, -1); | |
| 87 } | |
| 88 | |
| 89 public void persistLastModified(long lastModified) { | |
| 90 if (lastModified <= 0) { | |
| 91 Logger.debug(LOG_TAG, "Clearing persisted crypto/keys last modified timestamp."); | |
| 92 prefs.edit().remove(CRYPTO5_KEYS_LAST_MODIFIED).commit(); | |
| 93 return; | |
| 94 } | |
| 95 Logger.debug(LOG_TAG, "Persisting crypto/keys last modified timestamp " + lastModified + "."); | |
| 96 prefs.edit().putLong(CRYPTO5_KEYS_LAST_MODIFIED, lastModified).commit(); | |
| 97 } | |
| 98 | |
| 99 public void purge() { | |
| 100 persistLastModified(-1); | |
| 101 persistKeys(null); | |
| 102 } | |
| 103 } |
