Allow user-supplied secret key backup passphrases
Instead of passing the passphrase back to the user via a DisplayBackupCodeCallback, we directly return the passphrase which is now represented by a class. Also we now allow the user to provide the passphrase.
This commit is contained in:
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GPG Key ID:
62BEE9264BF17311
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@ -16,6 +16,7 @@
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*/
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package org.jivesoftware.smackx.ox;
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import static org.junit.jupiter.api.Assertions.assertArrayEquals;
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import static org.junit.jupiter.api.Assertions.assertEquals;
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import static org.junit.jupiter.api.Assertions.assertNotNull;
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import static org.junit.jupiter.api.Assertions.assertNull;
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@ -26,17 +27,11 @@ import java.io.IOException;
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import java.security.InvalidAlgorithmParameterException;
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import java.security.NoSuchAlgorithmException;
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import java.security.NoSuchProviderException;
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import java.util.Arrays;
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import java.util.Set;
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import java.util.logging.Level;
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import org.jivesoftware.smack.SmackException;
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import org.jivesoftware.smack.XMPPException;
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import org.jivesoftware.smack.util.StringUtils;
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import org.jivesoftware.smackx.ox.callback.backup.AskForBackupCodeCallback;
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import org.jivesoftware.smackx.ox.callback.backup.DisplayBackupCodeCallback;
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import org.jivesoftware.smackx.ox.callback.backup.SecretKeyBackupSelectionCallback;
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import org.jivesoftware.smackx.ox.crypto.PainlessOpenPgpProvider;
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import org.jivesoftware.smackx.ox.exception.InvalidBackupCodeException;
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import org.jivesoftware.smackx.ox.exception.MissingOpenPgpKeyException;
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@ -64,10 +59,6 @@ public class OXSecretKeyBackupIntegrationTest extends AbstractOpenPgpIntegration
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private static final File beforePath = new File(tempDir, "ox_backup_" + sessionId);
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private static final File afterPath = new File(tempDir, "ox_restore_" + sessionId);
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private String backupCode = null;
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private OpenPgpManager openPgpManager;
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/**
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* This integration test tests the basic secret key backup and restore functionality as described
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* in XEP-0373 §5.
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@ -123,7 +114,7 @@ public class OXSecretKeyBackupIntegrationTest extends AbstractOpenPgpIntegration
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OpenPgpStore beforeStore = new FileBasedOpenPgpStore(beforePath);
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beforeStore.setKeyRingProtector(new UnprotectedKeysProtector());
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PainlessOpenPgpProvider beforeProvider = new PainlessOpenPgpProvider(beforeStore);
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openPgpManager = OpenPgpManager.getInstanceFor(aliceConnection);
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OpenPgpManager openPgpManager = OpenPgpManager.getInstanceFor(aliceConnection);
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openPgpManager.setOpenPgpProvider(beforeProvider);
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OpenPgpSelf self = openPgpManager.getOpenPgpSelf();
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@ -141,29 +132,15 @@ public class OXSecretKeyBackupIntegrationTest extends AbstractOpenPgpIntegration
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PGPPublicKeyRing beforePub = beforeStore.getPublicKeyRing(alice, keyFingerprint);
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assertNotNull(beforePub);
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openPgpManager.backupSecretKeyToServer(new DisplayBackupCodeCallback() {
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@Override
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public void displayBackupCode(String backupCode) {
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OXSecretKeyBackupIntegrationTest.this.backupCode = backupCode;
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}
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}, new SecretKeyBackupSelectionCallback() {
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@Override
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public Set<OpenPgpV4Fingerprint> selectKeysToBackup(Set<OpenPgpV4Fingerprint> availableSecretKeys) {
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return availableSecretKeys;
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}
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});
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OpenPgpSecretKeyBackupPassphrase backupPassphrase =
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openPgpManager.backupSecretKeyToServer(availableSecretKeys -> availableSecretKeys);
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FileBasedOpenPgpStore afterStore = new FileBasedOpenPgpStore(afterPath);
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afterStore.setKeyRingProtector(new UnprotectedKeysProtector());
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PainlessOpenPgpProvider afterProvider = new PainlessOpenPgpProvider(afterStore);
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openPgpManager.setOpenPgpProvider(afterProvider);
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OpenPgpV4Fingerprint fingerprint = openPgpManager.restoreSecretKeyServerBackup(new AskForBackupCodeCallback() {
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@Override
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public String askForBackupCode() {
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return backupCode;
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}
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});
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OpenPgpV4Fingerprint fingerprint = openPgpManager.restoreSecretKeyServerBackup(() -> backupPassphrase);
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assertEquals(keyFingerprint, fingerprint);
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@ -173,10 +150,10 @@ public class OXSecretKeyBackupIntegrationTest extends AbstractOpenPgpIntegration
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PGPSecretKeyRing afterSec = afterStore.getSecretKeyRing(alice, keyFingerprint);
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assertNotNull(afterSec);
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assertTrue(Arrays.equals(beforeSec.getEncoded(), afterSec.getEncoded()));
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assertArrayEquals(beforeSec.getEncoded(), afterSec.getEncoded());
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PGPPublicKeyRing afterPub = afterStore.getPublicKeyRing(alice, keyFingerprint);
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assertNotNull(afterPub);
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assertTrue(Arrays.equals(beforePub.getEncoded(), afterPub.getEncoded()));
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assertArrayEquals(beforePub.getEncoded(), afterPub.getEncoded());
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}
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}
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@ -1,6 +1,6 @@
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/**
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*
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* Copyright 2017-2020 Florian Schmaus, 2018 Paul Schaub.
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* Copyright 2018-2020 Paul Schaub, 2017-2020 Florian Schmaus.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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@ -46,7 +46,6 @@ import org.jivesoftware.smack.xml.XmlPullParserException;
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import org.jivesoftware.smackx.disco.ServiceDiscoveryManager;
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import org.jivesoftware.smackx.ox.callback.backup.AskForBackupCodeCallback;
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import org.jivesoftware.smackx.ox.callback.backup.DisplayBackupCodeCallback;
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import org.jivesoftware.smackx.ox.callback.backup.SecretKeyBackupSelectionCallback;
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import org.jivesoftware.smackx.ox.crypto.OpenPgpProvider;
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import org.jivesoftware.smackx.ox.element.CryptElement;
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@ -389,8 +388,9 @@ public final class OpenPgpManager extends Manager {
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*
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* @see <a href="https://xmpp.org/extensions/xep-0373.html#synchro-pep">XEP-0373 §5</a>
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*
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* @param displayCodeCallback callback, which will receive the backup password used to encrypt the secret key.
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* @param selectKeyCallback callback, which will receive the users choice of which keys will be backed up.
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* @return secret key passphrase used to encrypt the backup.
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*
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* @throws InterruptedException if the thread is interrupted.
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* @throws PubSubException.NotALeafNodeException if the private node is not a {@link LeafNode}.
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* @throws XMPPException.XMPPErrorException in case of an XMPP protocol error.
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@ -402,8 +402,38 @@ public final class OpenPgpManager extends Manager {
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* @throws PGPException PGP is brittle
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* @throws MissingOpenPgpKeyException in case we have no OpenPGP key pair to back up.
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*/
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public void backupSecretKeyToServer(DisplayBackupCodeCallback displayCodeCallback,
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SecretKeyBackupSelectionCallback selectKeyCallback)
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public OpenPgpSecretKeyBackupPassphrase backupSecretKeyToServer(SecretKeyBackupSelectionCallback selectKeyCallback)
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throws InterruptedException, PubSubException.NotALeafNodeException,
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XMPPException.XMPPErrorException, SmackException.NotConnectedException, SmackException.NoResponseException,
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SmackException.NotLoggedInException, IOException,
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SmackException.FeatureNotSupportedException, PGPException, MissingOpenPgpKeyException {
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OpenPgpSecretKeyBackupPassphrase passphrase = SecretKeyBackupHelper.generateBackupPassword();
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backupSecretKeyToServer(selectKeyCallback, passphrase);
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return passphrase;
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}
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/**
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* Upload the encrypted secret key to a private PEP node.
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* The backup is encrypted using the provided secret key passphrase.
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*
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* @see <a href="https://xmpp.org/extensions/xep-0373.html#synchro-pep">XEP-0373 §5</a>
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*
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* @param selectKeyCallback callback, which will receive the users choice of which keys will be backed up. @param selectKeyCallback
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* @param passphrase secret key passphrase
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*
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* @throws InterruptedException if the thread is interrupted.
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* @throws PubSubException.NotALeafNodeException if the private node is not a {@link LeafNode}.
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* @throws XMPPException.XMPPErrorException in case of an XMPP protocol error.
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* @throws SmackException.NotConnectedException if we are not connected.
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* @throws SmackException.NoResponseException if the server doesn't respond.
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* @throws SmackException.NotLoggedInException if we are not logged in.
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* @throws IOException IO is dangerous.
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* @throws SmackException.FeatureNotSupportedException if the server doesn't support the PubSub whitelist access model.
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* @throws PGPException PGP is brittle
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* @throws MissingOpenPgpKeyException in case we have no OpenPGP key pair to back up.
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*/
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public void backupSecretKeyToServer(SecretKeyBackupSelectionCallback selectKeyCallback,
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OpenPgpSecretKeyBackupPassphrase passphrase)
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throws InterruptedException, PubSubException.NotALeafNodeException,
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XMPPException.XMPPErrorException, SmackException.NotConnectedException, SmackException.NoResponseException,
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SmackException.NotLoggedInException, IOException,
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@ -413,8 +443,6 @@ public final class OpenPgpManager extends Manager {
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BareJid ownJid = connection().getUser().asBareJid();
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String backupCode = SecretKeyBackupHelper.generateBackupPassword();
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PGPSecretKeyRingCollection secretKeyRings = provider.getStore().getSecretKeysOf(ownJid);
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Set<OpenPgpV4Fingerprint> availableKeyPairs = new HashSet<>();
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@ -424,10 +452,9 @@ public final class OpenPgpManager extends Manager {
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Set<OpenPgpV4Fingerprint> selectedKeyPairs = selectKeyCallback.selectKeysToBackup(availableKeyPairs);
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SecretkeyElement secretKey = SecretKeyBackupHelper.createSecretkeyElement(provider, ownJid, selectedKeyPairs, backupCode);
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SecretkeyElement secretKey = SecretKeyBackupHelper.createSecretkeyElement(provider, ownJid, selectedKeyPairs, passphrase);
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OpenPgpPubSubUtil.depositSecretKey(connection(), secretKey);
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displayCodeCallback.displayBackupCode(backupCode);
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}
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/**
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@ -476,7 +503,7 @@ public final class OpenPgpManager extends Manager {
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throw new NoBackupFoundException();
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}
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String backupCode = codeCallback.askForBackupCode();
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OpenPgpSecretKeyBackupPassphrase backupCode = codeCallback.askForBackupCode();
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PGPSecretKeyRing secretKeys = SecretKeyBackupHelper.restoreSecretKeyBackup(backup, backupCode);
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provider.getStore().importSecretKey(getJidOrThrow(), secretKeys);
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@ -0,0 +1,64 @@
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/**
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*
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* Copyright 2020 Paul Schaub.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smackx.ox;
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import static org.jivesoftware.smack.util.StringUtils.UNAMBIGUOUS_NUMBERS_AND_LETTERS_STRING;
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import java.util.regex.Pattern;
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/**
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* Represents a secret key backup passphrase whose format is described in XEP-0373 §5.3.
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*
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* @see <a href="https://xmpp.org/extensions/xep-0373.html#backup-encryption">
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* XEP-0373 §5.4 Encrypting the Secret Key Backup</a>
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*/
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public class OpenPgpSecretKeyBackupPassphrase implements CharSequence {
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private static final Pattern PASSPHRASE_PATTERN = Pattern.compile(
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"^([" + UNAMBIGUOUS_NUMBERS_AND_LETTERS_STRING + "]{4}-){5}" +
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"[" + UNAMBIGUOUS_NUMBERS_AND_LETTERS_STRING + "]{4}$");
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private final String passphrase;
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public OpenPgpSecretKeyBackupPassphrase(String passphrase) {
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if (!PASSPHRASE_PATTERN.matcher(passphrase).matches()) {
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throw new IllegalArgumentException("Passphrase must be 24 upper case letters and numbers from the english " +
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"alphabet without 'O' and '0', divided into blocks of 4 and separated with dashes ('-').");
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}
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this.passphrase = passphrase;
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}
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@Override
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public int length() {
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return passphrase.length();
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}
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@Override
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public char charAt(int i) {
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return passphrase.charAt(i);
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}
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@Override
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public CharSequence subSequence(int i, int i1) {
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return passphrase.subSequence(i, i1);
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}
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@Override
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public String toString() {
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return passphrase;
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}
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}
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@ -16,6 +16,8 @@
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*/
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package org.jivesoftware.smackx.ox.callback.backup;
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import org.jivesoftware.smackx.ox.OpenPgpSecretKeyBackupPassphrase;
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public interface AskForBackupCodeCallback {
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/**
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@ -27,5 +29,5 @@ public interface AskForBackupCodeCallback {
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*
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* @return backup code provided by the user.
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*/
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String askForBackupCode();
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OpenPgpSecretKeyBackupPassphrase askForBackupCode();
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}
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@ -1,32 +0,0 @@
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/**
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*
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* Copyright 2018 Paul Schaub.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smackx.ox.callback.backup;
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public interface DisplayBackupCodeCallback {
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/**
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* This method is used to provide a client access to the generated backup code.
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* The client can then go ahead and display the code to the user.
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* The backup code follows the format described in XEP-0373 §5.3
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*
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* @see <a href="https://xmpp.org/extensions/xep-0373.html#backup-encryption">
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* XEP-0373 §5.4 Encrypting the Secret Key Backup</a>
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*
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* @param backupCode backup code
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*/
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void displayBackupCode(String backupCode);
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}
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@ -23,6 +23,7 @@ import java.util.Set;
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import org.jivesoftware.smack.util.StringUtils;
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import org.jivesoftware.smack.util.stringencoder.Base64;
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import org.jivesoftware.smackx.ox.OpenPgpSecretKeyBackupPassphrase;
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import org.jivesoftware.smackx.ox.crypto.OpenPgpProvider;
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import org.jivesoftware.smackx.ox.element.SecretkeyElement;
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import org.jivesoftware.smackx.ox.exception.InvalidBackupCodeException;
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@ -51,8 +52,8 @@ public class SecretKeyBackupHelper {
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*
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* @return backup code
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*/
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public static String generateBackupPassword() {
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return StringUtils.secureOfflineAttackSafeRandomString();
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public static OpenPgpSecretKeyBackupPassphrase generateBackupPassword() {
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return new OpenPgpSecretKeyBackupPassphrase(StringUtils.secureOfflineAttackSafeRandomString());
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}
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/**
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@ -73,7 +74,7 @@ public class SecretKeyBackupHelper {
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public static SecretkeyElement createSecretkeyElement(OpenPgpProvider provider,
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BareJid owner,
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Set<OpenPgpV4Fingerprint> fingerprints,
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String backupCode)
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OpenPgpSecretKeyBackupPassphrase backupCode)
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throws PGPException, IOException, MissingOpenPgpKeyException {
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ByteArrayOutputStream buffer = new ByteArrayOutputStream();
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@ -105,9 +106,9 @@ public class SecretKeyBackupHelper {
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* @throws IOException IO is dangerous
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*/
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public static SecretkeyElement createSecretkeyElement(byte[] keys,
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String backupCode)
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OpenPgpSecretKeyBackupPassphrase backupCode)
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throws PGPException, IOException {
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byte[] encrypted = PGPainless.encryptWithPassword(keys, new Passphrase(backupCode.toCharArray()),
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byte[] encrypted = PGPainless.encryptWithPassword(keys, new Passphrase(backupCode.toString().toCharArray()),
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SymmetricKeyAlgorithm.AES_256);
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return new SecretkeyElement(Base64.encode(encrypted));
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}
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@ -123,13 +124,13 @@ public class SecretKeyBackupHelper {
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* @throws IOException IO is dangerous.
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* @throws PGPException PGP is brittle.
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*/
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public static PGPSecretKeyRing restoreSecretKeyBackup(SecretkeyElement backup, String backupCode)
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public static PGPSecretKeyRing restoreSecretKeyBackup(SecretkeyElement backup, OpenPgpSecretKeyBackupPassphrase backupCode)
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throws InvalidBackupCodeException, IOException, PGPException {
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byte[] encrypted = Base64.decode(backup.getB64Data());
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byte[] decrypted;
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try {
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decrypted = PGPainless.decryptWithPassword(encrypted, new Passphrase(backupCode.toCharArray()));
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decrypted = PGPainless.decryptWithPassword(encrypted, new Passphrase(backupCode.toString().toCharArray()));
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} catch (IOException | PGPException e) {
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throw new InvalidBackupCodeException("Could not decrypt secret key backup. Possibly wrong passphrase?", e);
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}
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@ -0,0 +1,57 @@
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/**
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*
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* Copyright 2020 Paul Schaub.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smackx.ox;
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import static org.junit.Assert.assertNotNull;
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import static org.junit.Assert.assertThrows;
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import org.jivesoftware.smackx.ox.util.SecretKeyBackupHelper;
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import org.junit.jupiter.api.Test;
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public class OpenPgpSecretKeyBackupPassphraseTest {
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@Test
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public void secretKeyPassphraseConstructorTest() {
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OpenPgpSecretKeyBackupPassphrase valid =
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new OpenPgpSecretKeyBackupPassphrase("TWNK-KD5Y-MT3T-E1GS-DRDB-KVTW");
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assertNotNull(valid);
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for (int i = 0; i < 50; i++) {
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assertNotNull(SecretKeyBackupHelper.generateBackupPassword());
|
||||
}
|
||||
|
||||
assertThrows(IllegalArgumentException.class,
|
||||
() -> new OpenPgpSecretKeyBackupPassphrase("TWNKKD5YMT3TE1GSDRDBKVTW"));
|
||||
|
||||
assertThrows(IllegalArgumentException.class,
|
||||
() -> new OpenPgpSecretKeyBackupPassphrase("0123-4567-89AB-CDEF-GHIJ-KLMN"));
|
||||
|
||||
assertThrows(IllegalArgumentException.class,
|
||||
() -> new OpenPgpSecretKeyBackupPassphrase("CONT-AINS-ILLE-GALL-ETTE-RSO0"));
|
||||
|
||||
assertThrows(IllegalArgumentException.class,
|
||||
() -> new OpenPgpSecretKeyBackupPassphrase("TWNK-KD5Y-MT3T-E1GS-DRDB-"));
|
||||
|
||||
assertThrows(IllegalArgumentException.class,
|
||||
() -> new OpenPgpSecretKeyBackupPassphrase("TWNK-KD5Y-MT3T-E1GS-DRDB-KVTW-ADDD"));
|
||||
|
||||
assertThrows(IllegalArgumentException.class,
|
||||
() -> new OpenPgpSecretKeyBackupPassphrase("TWNK KD5Y MT3T E1GS DRDB KVTW"));
|
||||
|
||||
}
|
||||
}
|
||||
|
|
@ -1,6 +1,6 @@
|
|||
/**
|
||||
*
|
||||
* Copyright 2018 Paul Schaub.
|
||||
* Copyright 2018-2020 Paul Schaub.
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
|
|
@ -18,17 +18,16 @@ package org.jivesoftware.smackx.ox;
|
|||
|
||||
import static junit.framework.TestCase.assertEquals;
|
||||
import static junit.framework.TestCase.assertTrue;
|
||||
import static org.junit.Assert.assertArrayEquals;
|
||||
|
||||
import java.io.File;
|
||||
import java.io.IOException;
|
||||
import java.security.InvalidAlgorithmParameterException;
|
||||
import java.security.NoSuchAlgorithmException;
|
||||
import java.security.NoSuchProviderException;
|
||||
import java.util.Arrays;
|
||||
import java.util.Collections;
|
||||
|
||||
import org.jivesoftware.smack.test.util.SmackTestSuite;
|
||||
|
||||
import org.jivesoftware.smackx.ox.crypto.PainlessOpenPgpProvider;
|
||||
import org.jivesoftware.smackx.ox.element.SecretkeyElement;
|
||||
import org.jivesoftware.smackx.ox.exception.InvalidBackupCodeException;
|
||||
|
|
@ -60,7 +59,7 @@ public class SecretKeyBackupHelperTest extends SmackTestSuite {
|
|||
public void backupPasswordGenerationTest() {
|
||||
final String alphabet = "123456789ABCDEFGHIJKLMNPQRSTUVWXYZ";
|
||||
|
||||
String backupCode = SecretKeyBackupHelper.generateBackupPassword();
|
||||
OpenPgpSecretKeyBackupPassphrase backupCode = SecretKeyBackupHelper.generateBackupPassword();
|
||||
assertEquals(29, backupCode.length());
|
||||
for (int i = 0; i < backupCode.length(); i++) {
|
||||
if ((i + 1) % 5 == 0) {
|
||||
|
|
@ -86,12 +85,13 @@ public class SecretKeyBackupHelperTest extends SmackTestSuite {
|
|||
provider.getStore().importSecretKey(jid, keyRing.getSecretKeys());
|
||||
|
||||
// Create encrypted backup
|
||||
String backupCode = SecretKeyBackupHelper.generateBackupPassword();
|
||||
SecretkeyElement element = SecretKeyBackupHelper.createSecretkeyElement(provider, jid, Collections.singleton(new OpenPgpV4Fingerprint(keyRing.getSecretKeys())), backupCode);
|
||||
OpenPgpSecretKeyBackupPassphrase backupCode = SecretKeyBackupHelper.generateBackupPassword();
|
||||
SecretkeyElement element = SecretKeyBackupHelper.createSecretkeyElement(provider, jid,
|
||||
Collections.singleton(new OpenPgpV4Fingerprint(keyRing.getSecretKeys())), backupCode);
|
||||
|
||||
// Decrypt backup and compare
|
||||
PGPSecretKeyRing secretKeyRing = SecretKeyBackupHelper.restoreSecretKeyBackup(element, backupCode);
|
||||
assertTrue(Arrays.equals(keyRing.getSecretKeys().getEncoded(), secretKeyRing.getEncoded()));
|
||||
assertArrayEquals(keyRing.getSecretKeys().getEncoded(), secretKeyRing.getEncoded());
|
||||
}
|
||||
|
||||
@AfterClass
|
||||
|
|
|
|||
Loading…
Reference in New Issue