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https://github.com/bitcoinj/bitcoinj.git
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KeyChainGroup: remove upgrade path from basic to deterministic
This commit is contained in:
Andreas Schildbach
parent
20aee84773
commit
4e8a19997d
3 changed files with 5 additions and 250 deletions
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@ -218,7 +218,7 @@ public class KeyChainGroup implements KeyBag {
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private BasicKeyChain basic;
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private final NetworkParameters params;
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// Keychains for deterministically derived keys. If this is null, no chains should be created automatically.
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// Keychains for deterministically derived keys.
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protected final @Nullable LinkedList<DeterministicKeyChain> chains;
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// currentKeys is used for normal, non-multisig/married wallets. currentAddresses is used when we're handing out
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// P2SH addresses. They're mutually exclusive.
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@ -282,7 +282,7 @@ public class KeyChainGroup implements KeyBag {
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}
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}
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/** Returns true if it contains any deterministic keychain or one could be created. */
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/** Returns true if it contains any deterministic keychain. */
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public boolean isSupportsDeterministicChains() {
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return chains != null;
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}
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@ -949,62 +949,13 @@ public class KeyChainGroup implements KeyBag {
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*/
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public void upgradeToDeterministic(Script.ScriptType preferredScriptType, KeyChainGroupStructure structure,
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long keyRotationTimeSecs, @Nullable KeyParameter aesKey)
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throws DeterministicUpgradeRequiresPassword, AllRandomKeysRotating {
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throws DeterministicUpgradeRequiresPassword {
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checkState(isSupportsDeterministicChains(), "doesn't support deterministic chains");
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checkNotNull(structure);
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checkArgument(keyRotationTimeSecs >= 0);
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if (!isDeterministicUpgradeRequired(preferredScriptType, keyRotationTimeSecs))
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return; // Nothing to do.
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// Basic --> P2PKH upgrade
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if (basic.numKeys() > 0 && getActiveKeyChain(Script.ScriptType.P2PKH, keyRotationTimeSecs) == null) {
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// Subtract one because the key rotation time might have been set to the creation time of the first known good
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// key, in which case, that's the one we want to find.
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ECKey keyToUse = basic.findOldestKeyAfter(keyRotationTimeSecs - 1);
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if (keyToUse == null)
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throw new AllRandomKeysRotating();
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boolean keyWasEncrypted = keyToUse.isEncrypted();
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if (keyWasEncrypted) {
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if (aesKey == null) {
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// We can't auto upgrade because we don't know the users password at this point. We throw an
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// exception so the calling code knows to abort the load and ask the user for their password, they can
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// then try loading the wallet again passing in the AES key.
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//
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// There are a few different approaches we could have used here, but they all suck. The most obvious
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// is to try and be as lazy as possible, running in the old random-wallet mode until the user enters
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// their password for some other reason and doing the upgrade then. But this could result in strange
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// and unexpected UI flows for the user, as well as complicating the job of wallet developers who then
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// have to support both "old" and "new" UI modes simultaneously, switching them on the fly. Given that
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// this is a one-off transition, it seems more reasonable to just ask the user for their password
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// on startup, and then the wallet app can have all the widgets for accessing seed words etc active
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// all the time.
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throw new DeterministicUpgradeRequiresPassword();
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}
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keyToUse = keyToUse.decrypt(aesKey);
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} else if (aesKey != null) {
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throw new IllegalStateException("AES Key was provided but wallet is not encrypted.");
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}
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log.info(
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"Upgrading from basic keychain to P2PKH deterministic keychain. Using oldest non-rotating private key (address: {})",
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LegacyAddress.fromKey(params, keyToUse));
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byte[] entropy = checkNotNull(keyToUse.getSecretBytes());
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// Private keys should be at least 128 bits long.
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checkState(entropy.length >= DeterministicSeed.DEFAULT_SEED_ENTROPY_BITS / 8);
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// We reduce the entropy here to 128 bits because people like to write their seeds down on paper, and 128
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// bits should be sufficient forever unless the laws of the universe change or ECC is broken; in either case
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// we all have bigger problems.
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entropy = Arrays.copyOfRange(entropy, 0, DeterministicSeed.DEFAULT_SEED_ENTROPY_BITS / 8); // final argument is exclusive range.
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checkState(entropy.length == DeterministicSeed.DEFAULT_SEED_ENTROPY_BITS / 8);
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DeterministicKeyChain chain = DeterministicKeyChain.builder()
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.entropy(entropy, keyToUse.getCreationTimeSeconds())
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.outputScriptType(Script.ScriptType.P2PKH)
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.accountPath(structure.accountPathFor(Script.ScriptType.P2PKH)).build();
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if (keyWasEncrypted)
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chain = chain.toEncrypted(checkNotNull(keyCrypter), aesKey);
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addAndActivateHDChain(chain);
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}
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// P2PKH --> P2WPKH upgrade
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if (preferredScriptType == Script.ScriptType.P2WPKH
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&& getActiveKeyChain(Script.ScriptType.P2WPKH, keyRotationTimeSecs) == null) {
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@ -542,13 +542,7 @@ public class KeyChainGroupTest {
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@Test
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public void deterministicUpgradeUnencrypted() throws Exception {
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// Check that a group that contains only random keys has its HD chain created using the private key bytes of
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// the oldest random key, so upgrading the same wallet twice gives the same outcome.
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group = KeyChainGroup.builder(MAINNET).lookaheadSize(LOOKAHEAD_SIZE).build();
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ECKey key1 = new ECKey();
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Utils.rollMockClock(86400);
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ECKey key2 = new ECKey();
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group.importKeys(key2, key1);
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group = KeyChainGroup.builder(MAINNET).fromRandom(Script.ScriptType.P2PKH).lookaheadSize(LOOKAHEAD_SIZE).build();
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List<Protos.Key> protobufs = group.serializeToProtobuf();
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group.upgradeToDeterministic(Script.ScriptType.P2PKH, KeyChainGroupStructure.DEFAULT, 0, null);
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@ -568,45 +562,12 @@ public class KeyChainGroupTest {
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DeterministicSeed seed2 = group.getActiveKeyChain().getSeed();
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assertEquals(seed1, seed2);
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assertEquals(dkey1, dkey2);
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// Check we used the right (oldest) key despite backwards import order.
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byte[] truncatedBytes = Arrays.copyOfRange(key1.getSecretBytes(), 0, 16);
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assertArrayEquals(seed1.getEntropyBytes(), truncatedBytes);
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}
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@Test
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public void deterministicUpgradeRotating() throws Exception {
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group = KeyChainGroup.builder(MAINNET).lookaheadSize(LOOKAHEAD_SIZE).build();
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long now = Utils.currentTimeSeconds();
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ECKey key1 = new ECKey();
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Utils.rollMockClock(86400);
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ECKey key2 = new ECKey();
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Utils.rollMockClock(86400);
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ECKey key3 = new ECKey();
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group.importKeys(key2, key1, key3);
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group.upgradeToDeterministic(Script.ScriptType.P2PKH, KeyChainGroupStructure.DEFAULT, now + 10, null);
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DeterministicSeed seed = group.getActiveKeyChain().getSeed();
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assertNotNull(seed);
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// Check we used the right key: oldest non rotating.
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byte[] truncatedBytes = Arrays.copyOfRange(key2.getSecretBytes(), 0, 16);
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assertArrayEquals(seed.getEntropyBytes(), truncatedBytes);
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}
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@Test
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public void deterministicUpgradeEncrypted() throws Exception {
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group = KeyChainGroup.builder(MAINNET).build();
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final ECKey key = new ECKey();
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group.importKeys(key);
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assertTrue(group.isDeterministicUpgradeRequired(Script.ScriptType.P2PKH, 0));
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group = KeyChainGroup.builder(MAINNET).fromRandom(Script.ScriptType.P2PKH).build();
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group.encrypt(KEY_CRYPTER, AES_KEY);
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assertTrue(group.isDeterministicUpgradeRequired(Script.ScriptType.P2PKH, 0));
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try {
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group.upgradeToDeterministic(Script.ScriptType.P2PKH, KeyChainGroupStructure.DEFAULT, 0, null);
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fail();
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} catch (DeterministicUpgradeRequiresPassword e) {
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// Expected.
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}
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group.upgradeToDeterministic(Script.ScriptType.P2PKH, KeyChainGroupStructure.DEFAULT, 0, AES_KEY);
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assertTrue(group.isEncrypted());
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assertFalse(group.isDeterministicUpgradeRequired(Script.ScriptType.P2PKH, 0));
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assertTrue(group.isDeterministicUpgradeRequired(Script.ScriptType.P2WPKH, 0));
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@ -614,9 +575,6 @@ public class KeyChainGroupTest {
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assertNotNull(deterministicSeed);
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assertTrue(deterministicSeed.isEncrypted());
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byte[] entropy = checkNotNull(group.getActiveKeyChain().toDecrypted(AES_KEY).getSeed()).getEntropyBytes();
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// Check we used the right key: oldest non rotating.
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byte[] truncatedBytes = Arrays.copyOfRange(key.getSecretBytes(), 0, 16);
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assertArrayEquals(entropy, truncatedBytes);
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}
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@Test
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@ -2982,55 +2982,6 @@ public class WalletTest extends TestWithWallet {
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assertNotEquals(watchKey1, watchKey2);
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}
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@SuppressWarnings("ConstantConditions")
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@Test
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public void keyRotationHD2() throws Exception {
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// Check we handle the following scenario: a weak random key is created, then some good random keys are created
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// but the weakness of the first isn't known yet. The wallet is upgraded to HD based on the weak key. Later, we
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// find out about the weakness and set the rotation time to after the bad key's creation date. A new HD chain
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// should be created based on the oldest known good key and the old chain + bad random key should rotate to it.
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// We fix the private keys just to make the test deterministic (last byte differs).
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Utils.setMockClock();
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ECKey badKey = ECKey.fromPrivate(Utils.HEX.decode("00905b93f990267f4104f316261fc10f9f983551f9ef160854f40102eb71cffdbb"));
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badKey.setCreationTimeSeconds(Utils.currentTimeSeconds());
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Utils.rollMockClock(86400);
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ECKey goodKey = ECKey.fromPrivate(Utils.HEX.decode("00905b93f990267f4104f316261fc10f9f983551f9ef160854f40102eb71cffdcc"));
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goodKey.setCreationTimeSeconds(Utils.currentTimeSeconds());
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// Do an upgrade based on the bad key.
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KeyChainGroup kcg = KeyChainGroup.builder(UNITTEST).build();
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kcg.importKeys(badKey, goodKey);
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Utils.rollMockClock(86400);
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wallet = new Wallet(UNITTEST, kcg); // This avoids the automatic HD initialisation
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assertTrue(kcg.getDeterministicKeyChains().isEmpty());
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wallet.upgradeToDeterministic(Script.ScriptType.P2PKH, null);
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DeterministicKey badWatchingKey = wallet.getWatchingKey();
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assertEquals(badKey.getCreationTimeSeconds(), badWatchingKey.getCreationTimeSeconds());
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sendMoneyToWallet(wallet, AbstractBlockChain.NewBlockType.BEST_CHAIN, CENT, LegacyAddress.fromKey(UNITTEST, badWatchingKey));
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// Now we set the rotation time to the time we started making good keys. This should create a new HD chain.
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wallet.setKeyRotationTime(goodKey.getCreationTimeSeconds());
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List<Transaction> txns = wallet.doMaintenance(null, false).get();
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assertEquals(1, txns.size());
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Address output = txns.get(0).getOutput(0).getScriptPubKey().getToAddress(UNITTEST);
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ECKey usedKey = wallet.findKeyFromPubKeyHash(output.getHash(), output.getOutputScriptType());
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assertEquals(goodKey.getCreationTimeSeconds(), usedKey.getCreationTimeSeconds());
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assertEquals(goodKey.getCreationTimeSeconds(), wallet.freshReceiveKey().getCreationTimeSeconds());
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assertEquals("mrM3TpCnav5YQuVA1xLercCGJH4DXujMtv", LegacyAddress.fromKey(UNITTEST, usedKey).toString());
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DeterministicKeyChain c = kcg.getDeterministicKeyChains().get(1);
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assertEquals(c.getEarliestKeyCreationTime(), goodKey.getCreationTimeSeconds());
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assertEquals(2, kcg.getDeterministicKeyChains().size());
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// Commit the maint txns.
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wallet.commitTx(txns.get(0));
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// Check next maintenance does nothing.
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assertTrue(wallet.doMaintenance(null, false).get().isEmpty());
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assertEquals(c, kcg.getDeterministicKeyChains().get(1));
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assertEquals(2, kcg.getDeterministicKeyChains().size());
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}
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@Test(expected = IllegalArgumentException.class)
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public void importOfHDKeyForbidden() throws Exception {
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wallet.importKey(wallet.freshReceiveKey());
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@ -3234,108 +3185,6 @@ public class WalletTest extends TestWithWallet {
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assertEquals(1, keys.size());
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}
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@Test
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public void upgradeToDeterministic_basic_to_P2PKH_unencrypted() throws Exception {
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wallet = new Wallet(UNITTEST, KeyChainGroup.builder(UNITTEST).build());
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wallet.importKeys(Arrays.asList(new ECKey(), new ECKey()));
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assertFalse(wallet.isEncrypted());
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assertTrue(wallet.isDeterministicUpgradeRequired(Script.ScriptType.P2PKH));
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assertTrue(wallet.isDeterministicUpgradeRequired(Script.ScriptType.P2WPKH));
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try {
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wallet.freshReceiveKey();
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fail();
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} catch (DeterministicUpgradeRequiredException e) {
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// Expected.
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}
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wallet.upgradeToDeterministic(Script.ScriptType.P2PKH, null);
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assertFalse(wallet.isEncrypted());
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assertFalse(wallet.isDeterministicUpgradeRequired(Script.ScriptType.P2PKH));
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assertTrue(wallet.isDeterministicUpgradeRequired(Script.ScriptType.P2WPKH));
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assertEquals(Script.ScriptType.P2PKH, wallet.currentReceiveAddress().getOutputScriptType());
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assertEquals(Script.ScriptType.P2PKH, wallet.freshReceiveAddress().getOutputScriptType());
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}
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@Test
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public void upgradeToDeterministic_basic_to_P2PKH_encrypted() throws Exception {
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wallet = new Wallet(UNITTEST, KeyChainGroup.builder(UNITTEST).build());
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wallet.importKeys(Arrays.asList(new ECKey(), new ECKey()));
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assertFalse(wallet.isEncrypted());
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assertTrue(wallet.isDeterministicUpgradeRequired(Script.ScriptType.P2PKH));
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assertTrue(wallet.isDeterministicUpgradeRequired(Script.ScriptType.P2WPKH));
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KeyParameter aesKey = new KeyCrypterScrypt(SCRYPT_ITERATIONS).deriveKey("abc");
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wallet.encrypt(new KeyCrypterScrypt(), aesKey);
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assertTrue(wallet.isEncrypted());
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try {
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wallet.freshReceiveKey();
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fail();
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} catch (DeterministicUpgradeRequiredException e) {
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// Expected.
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}
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try {
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wallet.upgradeToDeterministic(Script.ScriptType.P2PKH, null);
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fail();
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} catch (DeterministicUpgradeRequiresPassword e) {
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// Expected.
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}
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wallet.upgradeToDeterministic(Script.ScriptType.P2PKH, aesKey);
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assertTrue(wallet.isEncrypted());
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assertFalse(wallet.isDeterministicUpgradeRequired(Script.ScriptType.P2PKH));
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assertTrue(wallet.isDeterministicUpgradeRequired(Script.ScriptType.P2WPKH));
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assertEquals(Script.ScriptType.P2PKH, wallet.currentReceiveAddress().getOutputScriptType());
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assertEquals(Script.ScriptType.P2PKH, wallet.freshReceiveAddress().getOutputScriptType());
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}
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@Test
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public void upgradeToDeterministic_basic_to_P2WPKH_unencrypted() throws Exception {
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wallet = new Wallet(UNITTEST, KeyChainGroup.builder(UNITTEST).build());
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wallet.importKeys(Arrays.asList(new ECKey(), new ECKey()));
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assertFalse(wallet.isEncrypted());
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assertTrue(wallet.isDeterministicUpgradeRequired(Script.ScriptType.P2PKH));
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assertTrue(wallet.isDeterministicUpgradeRequired(Script.ScriptType.P2WPKH));
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try {
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wallet.freshReceiveKey();
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fail();
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} catch (DeterministicUpgradeRequiredException e) {
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// Expected.
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}
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wallet.upgradeToDeterministic(Script.ScriptType.P2WPKH, null);
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assertFalse(wallet.isEncrypted());
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assertFalse(wallet.isDeterministicUpgradeRequired(Script.ScriptType.P2PKH));
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assertFalse(wallet.isDeterministicUpgradeRequired(Script.ScriptType.P2WPKH));
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assertEquals(Script.ScriptType.P2WPKH, wallet.currentReceiveAddress().getOutputScriptType());
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assertEquals(Script.ScriptType.P2WPKH, wallet.freshReceiveAddress().getOutputScriptType());
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}
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@Test
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public void upgradeToDeterministic_basic_to_P2WPKH_encrypted() throws Exception {
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wallet = new Wallet(UNITTEST, KeyChainGroup.builder(UNITTEST).build());
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wallet.importKeys(Arrays.asList(new ECKey(), new ECKey()));
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assertFalse(wallet.isEncrypted());
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assertTrue(wallet.isDeterministicUpgradeRequired(Script.ScriptType.P2PKH));
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assertTrue(wallet.isDeterministicUpgradeRequired(Script.ScriptType.P2WPKH));
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KeyParameter aesKey = new KeyCrypterScrypt(SCRYPT_ITERATIONS).deriveKey("abc");
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wallet.encrypt(new KeyCrypterScrypt(), aesKey);
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assertTrue(wallet.isEncrypted());
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try {
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wallet.upgradeToDeterministic(Script.ScriptType.P2WPKH, null);
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fail();
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} catch (DeterministicUpgradeRequiresPassword e) {
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// Expected.
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}
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wallet.upgradeToDeterministic(Script.ScriptType.P2WPKH, aesKey);
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assertTrue(wallet.isEncrypted());
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assertFalse(wallet.isDeterministicUpgradeRequired(Script.ScriptType.P2PKH));
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assertFalse(wallet.isDeterministicUpgradeRequired(Script.ScriptType.P2WPKH));
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assertEquals(Script.ScriptType.P2WPKH, wallet.currentReceiveAddress().getOutputScriptType());
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assertEquals(Script.ScriptType.P2WPKH, wallet.freshReceiveAddress().getOutputScriptType());
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}
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@Test
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public void upgradeToDeterministic_P2PKH_to_P2WPKH_unencrypted() throws Exception {
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wallet = Wallet.createDeterministic(UNITTEST, Script.ScriptType.P2PKH);
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@ -3489,9 +3338,6 @@ public class WalletTest extends TestWithWallet {
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Wallet wallet = Wallet.fromKeys(UNITTEST, Arrays.asList(key));
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assertEquals(1, wallet.getImportedKeys().size());
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assertEquals(key, wallet.getImportedKeys().get(0));
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wallet.upgradeToDeterministic(Script.ScriptType.P2PKH, null);
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String seed = wallet.getKeyChainSeed().toHexString();
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assertEquals("5ca8cd6c01aa004d3c5396c628b78a4a89462f412f460a845b594ac42eceaa264b0e14dcd4fe73d4ed08ce06f4c28facfa85042d26d784ab2798a870bb7af556", seed);
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}
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@Test
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