diff options
Diffstat (limited to 'OpenKeychain/src/main/java/org')
14 files changed, 484 insertions, 158 deletions
diff --git a/OpenKeychain/src/main/java/org/spongycastle/openpgp/jcajce/JcaSkipMarkerPGPObjectFactory.java b/OpenKeychain/src/main/java/org/bouncycastle/openpgp/jcajce/JcaSkipMarkerPGPObjectFactory.java index 72d6036ab..72d6036ab 100644 --- a/OpenKeychain/src/main/java/org/spongycastle/openpgp/jcajce/JcaSkipMarkerPGPObjectFactory.java +++ b/OpenKeychain/src/main/java/org/bouncycastle/openpgp/jcajce/JcaSkipMarkerPGPObjectFactory.java diff --git a/OpenKeychain/src/main/java/org/spongycastle/openpgp/operator/jcajce/CachingDataDecryptorFactory.java b/OpenKeychain/src/main/java/org/bouncycastle/openpgp/operator/jcajce/CachingDataDecryptorFactory.java index 703af94f4..703af94f4 100644 --- a/OpenKeychain/src/main/java/org/spongycastle/openpgp/operator/jcajce/CachingDataDecryptorFactory.java +++ b/OpenKeychain/src/main/java/org/bouncycastle/openpgp/operator/jcajce/CachingDataDecryptorFactory.java diff --git a/OpenKeychain/src/main/java/org/spongycastle/openpgp/operator/jcajce/NfcSyncPGPContentSignerBuilder.java b/OpenKeychain/src/main/java/org/bouncycastle/openpgp/operator/jcajce/NfcSyncPGPContentSignerBuilder.java index 584d86891..584d86891 100644 --- a/OpenKeychain/src/main/java/org/spongycastle/openpgp/operator/jcajce/NfcSyncPGPContentSignerBuilder.java +++ b/OpenKeychain/src/main/java/org/bouncycastle/openpgp/operator/jcajce/NfcSyncPGPContentSignerBuilder.java diff --git a/OpenKeychain/src/main/java/org/bouncycastle/openpgp/operator/jcajce/SessionKeySecretKeyDecryptorBuilder.java b/OpenKeychain/src/main/java/org/bouncycastle/openpgp/operator/jcajce/SessionKeySecretKeyDecryptorBuilder.java new file mode 100644 index 000000000..6f1b6f5ef --- /dev/null +++ b/OpenKeychain/src/main/java/org/bouncycastle/openpgp/operator/jcajce/SessionKeySecretKeyDecryptorBuilder.java @@ -0,0 +1,116 @@ +/** + * Copyright (c) 2016 Vincent Breitmoser + * + * Licensed under the Bouncy Castle License (MIT license). See LICENSE file for details. + */ + +package org.bouncycastle.openpgp.operator.jcajce; + + +import java.security.InvalidAlgorithmParameterException; +import java.security.InvalidKeyException; +import java.security.Provider; + +import javax.crypto.BadPaddingException; +import javax.crypto.Cipher; +import javax.crypto.IllegalBlockSizeException; +import javax.crypto.spec.IvParameterSpec; +import org.bouncycastle.bcpg.S2K; +import org.bouncycastle.jcajce.util.DefaultJcaJceHelper; +import org.bouncycastle.jcajce.util.NamedJcaJceHelper; +import org.bouncycastle.jcajce.util.ProviderJcaJceHelper; +import org.bouncycastle.openpgp.PGPException; +import org.bouncycastle.openpgp.operator.PBESecretKeyDecryptor; +import org.bouncycastle.openpgp.operator.PGPDigestCalculatorProvider; + + +/** This is a builder for a special PBESecretKeyDecryptor which is parametrized by a + * fixed session key, which is used in place of the one obtained from a passphrase. + */ +public class SessionKeySecretKeyDecryptorBuilder +{ + private OperatorHelper helper = new OperatorHelper(new DefaultJcaJceHelper()); + private PGPDigestCalculatorProvider calculatorProvider; + + private JcaPGPDigestCalculatorProviderBuilder calculatorProviderBuilder; + + public SessionKeySecretKeyDecryptorBuilder() + { + this.calculatorProviderBuilder = new JcaPGPDigestCalculatorProviderBuilder(); + } + + public SessionKeySecretKeyDecryptorBuilder(PGPDigestCalculatorProvider calculatorProvider) + { + this.calculatorProvider = calculatorProvider; + } + + public SessionKeySecretKeyDecryptorBuilder setProvider(Provider provider) + { + this.helper = new OperatorHelper(new ProviderJcaJceHelper(provider)); + + if (calculatorProviderBuilder != null) + { + calculatorProviderBuilder.setProvider(provider); + } + + return this; + } + + public SessionKeySecretKeyDecryptorBuilder setProvider(String providerName) + { + this.helper = new OperatorHelper(new NamedJcaJceHelper(providerName)); + + if (calculatorProviderBuilder != null) + { + calculatorProviderBuilder.setProvider(providerName); + } + + return this; + } + + public PBESecretKeyDecryptor build(final byte[] sessionKey) + throws PGPException + { + if (calculatorProvider == null) + { + calculatorProvider = calculatorProviderBuilder.build(); + } + + return new PBESecretKeyDecryptor(null, calculatorProvider) + { + @Override + public byte[] makeKeyFromPassPhrase(int keyAlgorithm, S2K s2k) throws PGPException { + return sessionKey; + } + + public byte[] recoverKeyData(int encAlgorithm, byte[] key, byte[] iv, byte[] keyData, int keyOff, int keyLen) + throws PGPException + { + try + { + Cipher c = helper.createCipher(PGPUtil.getSymmetricCipherName(encAlgorithm) + "/CFB/NoPadding"); + + c.init(Cipher.DECRYPT_MODE, PGPUtil.makeSymmetricKey(encAlgorithm, key), new IvParameterSpec(iv)); + + return c.doFinal(keyData, keyOff, keyLen); + } + catch (IllegalBlockSizeException e) + { + throw new PGPException("illegal block size: " + e.getMessage(), e); + } + catch (BadPaddingException e) + { + throw new PGPException("bad padding: " + e.getMessage(), e); + } + catch (InvalidAlgorithmParameterException e) + { + throw new PGPException("invalid parameter: " + e.getMessage(), e); + } + catch (InvalidKeyException e) + { + throw new PGPException("invalid key: " + e.getMessage(), e); + } + } + }; + } +} diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/operations/CertifyOperation.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/operations/CertifyOperation.java index 4ad75fde1..79b42ecc4 100644 --- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/operations/CertifyOperation.java +++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/operations/CertifyOperation.java @@ -38,6 +38,7 @@ import org.sufficientlysecure.keychain.pgp.PgpCertifyOperation.PgpCertifyResult; import org.sufficientlysecure.keychain.pgp.Progressable; import org.sufficientlysecure.keychain.pgp.UncachedKeyRing; import org.sufficientlysecure.keychain.pgp.exception.PgpGeneralException; +import org.sufficientlysecure.keychain.provider.CachedPublicKeyRing; import org.sufficientlysecure.keychain.provider.ProviderHelper; import org.sufficientlysecure.keychain.provider.ProviderHelper.NotFoundException; import org.sufficientlysecure.keychain.service.CertifyActionsParcel; @@ -75,24 +76,22 @@ public class CertifyOperation extends BaseOperation<CertifyActionsParcel> { // Retrieve and unlock secret key CanonicalizedSecretKey certificationKey; + long masterKeyId = parcel.mMasterKeyId; try { log.add(LogType.MSG_CRT_MASTER_FETCH, 1); - CanonicalizedSecretKeyRing secretKeyRing = - mProviderHelper.getCanonicalizedSecretKeyRing(parcel.mMasterKeyId); - log.add(LogType.MSG_CRT_UNLOCK, 1); - certificationKey = secretKeyRing.getSecretKey(); + CachedPublicKeyRing cachedPublicKeyRing = mProviderHelper.getCachedPublicKeyRing(masterKeyId); Passphrase passphrase; - switch (certificationKey.getSecretKeyType()) { + switch (cachedPublicKeyRing.getSecretKeyType(masterKeyId)) { case PIN: case PATTERN: case PASSPHRASE: passphrase = cryptoInput.getPassphrase(); if (passphrase == null) { try { - passphrase = getCachedPassphrase(certificationKey.getKeyId(), certificationKey.getKeyId()); + passphrase = getCachedPassphrase(masterKeyId, masterKeyId); } catch (PassphraseCacheInterface.NoSecretKeyException ignored) { // treat as a cache miss for error handling purposes } @@ -100,10 +99,7 @@ public class CertifyOperation extends BaseOperation<CertifyActionsParcel> { if (passphrase == null) { return new CertifyResult(log, - RequiredInputParcel.createRequiredSignPassphrase( - certificationKey.getKeyId(), - certificationKey.getKeyId(), - null), + RequiredInputParcel.createRequiredSignPassphrase(masterKeyId, masterKeyId, null), cryptoInput ); } @@ -123,7 +119,14 @@ public class CertifyOperation extends BaseOperation<CertifyActionsParcel> { return new CertifyResult(CertifyResult.RESULT_ERROR, log); } - if (!certificationKey.unlock(passphrase)) { + // Get actual secret key + CanonicalizedSecretKeyRing secretKeyRing = + mProviderHelper.getCanonicalizedSecretKeyRing(parcel.mMasterKeyId); + certificationKey = secretKeyRing.getSecretKey(); + + log.add(LogType.MSG_CRT_UNLOCK, 1); + boolean unlockSuccessful = certificationKey.unlock(passphrase); + if (!unlockSuccessful) { log.add(LogType.MSG_CRT_ERROR_UNLOCK, 2); return new CertifyResult(CertifyResult.RESULT_ERROR, log); } @@ -142,8 +145,7 @@ public class CertifyOperation extends BaseOperation<CertifyActionsParcel> { int certifyOk = 0, certifyError = 0, uploadOk = 0, uploadError = 0; NfcSignOperationsBuilder allRequiredInput = new NfcSignOperationsBuilder( - cryptoInput.getSignatureTime(), certificationKey.getKeyId(), - certificationKey.getKeyId()); + cryptoInput.getSignatureTime(), masterKeyId, masterKeyId); // Work through all requested certifications for (CertifyAction action : parcel.mCertifyActions) { diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/CanonicalizedSecretKey.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/CanonicalizedSecretKey.java index ee05453e0..a02ff6685 100644 --- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/CanonicalizedSecretKey.java +++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/CanonicalizedSecretKey.java @@ -18,7 +18,16 @@ package org.sufficientlysecure.keychain.pgp; + +import java.nio.ByteBuffer; +import java.security.PrivateKey; +import java.security.interfaces.RSAPrivateCrtKey; +import java.util.Date; +import java.util.HashMap; +import java.util.Map; + import org.bouncycastle.bcpg.S2K; +import org.bouncycastle.bcpg.SymmetricKeyAlgorithmTags; import org.bouncycastle.openpgp.PGPException; import org.bouncycastle.openpgp.PGPPrivateKey; import org.bouncycastle.openpgp.PGPSecretKey; @@ -33,20 +42,15 @@ import org.bouncycastle.openpgp.operator.jcajce.JcaPGPKeyConverter; import org.bouncycastle.openpgp.operator.jcajce.JcePBESecretKeyDecryptorBuilder; import org.bouncycastle.openpgp.operator.jcajce.JcePublicKeyDataDecryptorFactoryBuilder; import org.bouncycastle.openpgp.operator.jcajce.NfcSyncPGPContentSignerBuilder; +import org.bouncycastle.openpgp.operator.jcajce.SessionKeySecretKeyDecryptorBuilder; import org.sufficientlysecure.keychain.Constants; import org.sufficientlysecure.keychain.pgp.exception.PgpGeneralException; import org.sufficientlysecure.keychain.pgp.exception.PgpKeyNotFoundException; +import org.sufficientlysecure.keychain.provider.ProviderHelper; import org.sufficientlysecure.keychain.service.input.CryptoInputParcel; import org.sufficientlysecure.keychain.util.Log; import org.sufficientlysecure.keychain.util.Passphrase; -import java.nio.ByteBuffer; -import java.security.PrivateKey; -import java.security.interfaces.RSAPrivateCrtKey; -import java.util.Date; -import java.util.HashMap; -import java.util.Map; - /** * Wrapper for a PGPSecretKey. @@ -118,7 +122,14 @@ public class CanonicalizedSecretKey extends CanonicalizedPublicKey { } - public SecretKeyType getSecretKeyType() { + /** This method returns the SecretKeyType for this secret key, testing for an empty + * passphrase in the process. + * + * This method can potentially take a LONG time (i.e. seconds), so it should only + * ever be called by {@link ProviderHelper} for the purpose of caching its output + * in the database. + */ + public SecretKeyType getSecretKeyTypeSuperExpensive() { S2K s2k = mSecretKey.getS2K(); if (s2k != null && s2k.getType() == S2K.GNU_DUMMY_S2K) { // divert to card is special @@ -145,13 +156,12 @@ public class CanonicalizedSecretKey extends CanonicalizedPublicKey { // Otherwise, it's just a regular ol' passphrase return SecretKeyType.PASSPHRASE; } - } /** * Returns true on right passphrase */ - public boolean unlock(Passphrase passphrase) throws PgpGeneralException { + public boolean unlock(final Passphrase passphrase) throws PgpGeneralException { // handle keys on OpenPGP cards like they were unlocked S2K s2k = mSecretKey.getS2K(); if (s2k != null @@ -163,8 +173,26 @@ public class CanonicalizedSecretKey extends CanonicalizedPublicKey { // try to extract keys using the passphrase try { - PBESecretKeyDecryptor keyDecryptor = new JcePBESecretKeyDecryptorBuilder().setProvider( - Constants.BOUNCY_CASTLE_PROVIDER_NAME).build(passphrase.getCharArray()); + + int keyEncryptionAlgorithm = mSecretKey.getKeyEncryptionAlgorithm(); + if (keyEncryptionAlgorithm == SymmetricKeyAlgorithmTags.NULL) { + mPrivateKey = mSecretKey.extractPrivateKey(null); + mPrivateKeyState = PRIVATE_KEY_STATE_UNLOCKED; + return true; + } + + byte[] sessionKey; + sessionKey = passphrase.getCachedSessionKeyForParameters(keyEncryptionAlgorithm, s2k); + if (sessionKey == null) { + PBESecretKeyDecryptor keyDecryptor = new JcePBESecretKeyDecryptorBuilder().setProvider( + Constants.BOUNCY_CASTLE_PROVIDER_NAME).build(passphrase.getCharArray()); + // this operation is EXPENSIVE, so we cache its result in the passed Passphrase object! + sessionKey = keyDecryptor.makeKeyFromPassPhrase(keyEncryptionAlgorithm, s2k); + passphrase.addCachedSessionKeyForParameters(keyEncryptionAlgorithm, s2k, sessionKey); + } + + PBESecretKeyDecryptor keyDecryptor = new SessionKeySecretKeyDecryptorBuilder() + .setProvider(Constants.BOUNCY_CASTLE_PROVIDER_NAME).build(sessionKey); mPrivateKey = mSecretKey.extractPrivateKey(keyDecryptor); mPrivateKeyState = PRIVATE_KEY_STATE_UNLOCKED; } catch (PGPException e) { diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/CanonicalizedSecretKeyRing.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/CanonicalizedSecretKeyRing.java index 63ffc3156..6ed225a83 100644 --- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/CanonicalizedSecretKeyRing.java +++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/CanonicalizedSecretKeyRing.java @@ -70,20 +70,6 @@ public class CanonicalizedSecretKeyRing extends CanonicalizedKeyRing { return new CanonicalizedSecretKey(this, mRing.getSecretKey(id)); } - /** Returns the key id which should be used for signing. - * - * This method returns keys which are actually available (ie. secret available, and not stripped, - * revoked, or expired), hence only works on keyrings where a secret key is available! - */ - public long getSecretSignId() throws PgpGeneralException { - for(CanonicalizedSecretKey key : secretKeyIterator()) { - if (key.canSign() && key.isValid() && key.getSecretKeyType().isUsable()) { - return key.getKeyId(); - } - } - throw new PgpGeneralException("no valid signing key available"); - } - public IterableIterator<CanonicalizedSecretKey> secretKeyIterator() { final Iterator<PGPSecretKey> it = mRing.getSecretKeys(); return new IterableIterator<>(new Iterator<CanonicalizedSecretKey>() { diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/ComparableS2K.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/ComparableS2K.java new file mode 100644 index 000000000..99b9cdab2 --- /dev/null +++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/ComparableS2K.java @@ -0,0 +1,121 @@ +/* + * Copyright (C) 2016 Vincent Breitmoser <look@my.amazin.horse> + * + * 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 org.sufficientlysecure.keychain.pgp; + + +import java.util.Arrays; + +import android.os.Parcel; +import android.os.Parcelable; + +import org.bouncycastle.bcpg.S2K; + + +/** This is an immutable and parcelable class which stores the full s2k parametrization + * of an encrypted secret key, i.e. all fields of the {@link S2K} class (type, hash algo, + * iteration count, iv) plus the encryptionAlgorithm. This class is intended to be used + * as key in a HashMap for session key caching purposes, and overrides the + * {@link #hashCode} and {@link #equals} methods in a suitable way. + * + * Note that although it is a rather unlikely scenario that secret keys of the same key + * are encrypted with different ciphers, the encryption algorithm still determines the + * length of the specific session key and thus needs to be considered for purposes of + * session key caching. + * + * @see org.bouncycastle.bcpg.S2K + */ +public class ComparableS2K implements Parcelable { + + private final int encryptionAlgorithm; + private final int s2kType; + private final int s2kHashAlgo; + private final long s2kItCount; + private final byte[] s2kIV; + + Integer cachedHashCode; + + public ComparableS2K(int encryptionAlgorithm, S2K s2k) { + this.encryptionAlgorithm = encryptionAlgorithm; + this.s2kType = s2k.getType(); + this.s2kHashAlgo = s2k.getHashAlgorithm(); + this.s2kItCount = s2k.getIterationCount(); + this.s2kIV = s2k.getIV(); + } + + protected ComparableS2K(Parcel in) { + encryptionAlgorithm = in.readInt(); + s2kType = in.readInt(); + s2kHashAlgo = in.readInt(); + s2kItCount = in.readLong(); + s2kIV = in.createByteArray(); + } + + @Override + public int hashCode() { + if (cachedHashCode == null) { + cachedHashCode = encryptionAlgorithm; + cachedHashCode = 31 * cachedHashCode + s2kType; + cachedHashCode = 31 * cachedHashCode + s2kHashAlgo; + cachedHashCode = 31 * cachedHashCode + (int) (s2kItCount ^ (s2kItCount >>> 32)); + cachedHashCode = 31 * cachedHashCode + Arrays.hashCode(s2kIV); + } + + return cachedHashCode; + } + + @Override + public boolean equals(Object o) { + boolean isComparableS2K = o instanceof ComparableS2K; + if (!isComparableS2K) { + return false; + } + ComparableS2K other = (ComparableS2K) o; + return encryptionAlgorithm == other.encryptionAlgorithm + && s2kType == other.s2kType + && s2kHashAlgo == other.s2kHashAlgo + && s2kItCount == other.s2kItCount + && Arrays.equals(s2kIV, other.s2kIV); + } + + @Override + public int describeContents() { + return 0; + } + + @Override + public void writeToParcel(Parcel dest, int flags) { + dest.writeInt(encryptionAlgorithm); + dest.writeInt(s2kType); + dest.writeInt(s2kHashAlgo); + dest.writeLong(s2kItCount); + dest.writeByteArray(s2kIV); + } + + public static final Creator<ComparableS2K> CREATOR = new Creator<ComparableS2K>() { + @Override + public ComparableS2K createFromParcel(Parcel in) { + return new ComparableS2K(in); + } + + @Override + public ComparableS2K[] newArray(int size) { + return new ComparableS2K[size]; + } + }; + +} diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpDecryptVerifyOperation.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpDecryptVerifyOperation.java index 1ebc75b7d..b6f102593 100644 --- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpDecryptVerifyOperation.java +++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpDecryptVerifyOperation.java @@ -1,6 +1,7 @@ /* * Copyright (C) 2012-2014 Dominik Schürmann <dominik@dominikschuermann.de> * Copyright (C) 2010-2014 Thialfihar <thi@thialfihar.org> + * Copyright (C) 2015-2016 Vincent Breitmoser <look@my.amazin.horse> * * 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 @@ -64,6 +65,8 @@ import org.sufficientlysecure.keychain.operations.results.OperationResult.LogTyp import org.sufficientlysecure.keychain.operations.results.OperationResult.OperationLog; import org.sufficientlysecure.keychain.pgp.CanonicalizedSecretKey.SecretKeyType; import org.sufficientlysecure.keychain.pgp.exception.PgpGeneralException; +import org.sufficientlysecure.keychain.pgp.exception.PgpKeyNotFoundException; +import org.sufficientlysecure.keychain.provider.CachedPublicKeyRing; import org.sufficientlysecure.keychain.provider.KeychainContract.KeyRings; import org.sufficientlysecure.keychain.provider.ProviderHelper; import org.sufficientlysecure.keychain.service.input.CryptoInputParcel; @@ -539,7 +542,7 @@ public class PgpDecryptVerifyOperation extends BaseOperation<PgpDecryptVerifyInp PGPPublicKeyEncryptedData encryptedDataAsymmetric = null; PGPPBEEncryptedData encryptedDataSymmetric = null; - CanonicalizedSecretKey secretEncryptionKey = null; + CanonicalizedSecretKey decryptionKey = null; Passphrase passphrase = null; @@ -560,83 +563,87 @@ public class PgpDecryptVerifyOperation extends BaseOperation<PgpDecryptVerifyInp log.add(LogType.MSG_DC_ASYM, indent, KeyFormattingUtils.convertKeyIdToHex(subKeyId)); - CanonicalizedSecretKeyRing secretKeyRing; + CachedPublicKeyRing cachedPublicKeyRing; try { // get actual keyring object based on master key id - secretKeyRing = mProviderHelper.getCanonicalizedSecretKeyRing( + cachedPublicKeyRing = mProviderHelper.getCachedPublicKeyRing( KeyRings.buildUnifiedKeyRingsFindBySubkeyUri(subKeyId) ); - } catch (ProviderHelper.NotFoundException e) { - // continue with the next packet in the while loop - log.add(LogType.MSG_DC_ASKIP_NO_KEY, indent + 1); - continue; - } + long masterKeyId = cachedPublicKeyRing.getMasterKeyId(); + + // allow only specific keys for decryption? + if (input.getAllowedKeyIds() != null) { + Log.d(Constants.TAG, "encData.getKeyID(): " + subKeyId); + Log.d(Constants.TAG, "mAllowedKeyIds: " + input.getAllowedKeyIds()); + Log.d(Constants.TAG, "masterKeyId: " + masterKeyId); + + if (!input.getAllowedKeyIds().contains(masterKeyId)) { + // this key is in our db, but NOT allowed! + // continue with the next packet in the while loop + result.skippedDisallowedKey = true; + log.add(LogType.MSG_DC_ASKIP_NOT_ALLOWED, indent + 1); + continue; + } + } - // allow only specific keys for decryption? - if (input.getAllowedKeyIds() != null) { - long masterKeyId = secretKeyRing.getMasterKeyId(); - Log.d(Constants.TAG, "encData.getKeyID(): " + subKeyId); - Log.d(Constants.TAG, "mAllowedKeyIds: " + input.getAllowedKeyIds()); - Log.d(Constants.TAG, "masterKeyId: " + masterKeyId); - - if (!input.getAllowedKeyIds().contains(masterKeyId)) { - // this key is in our db, but NOT allowed! - // continue with the next packet in the while loop - result.skippedDisallowedKey = true; - log.add(LogType.MSG_DC_ASKIP_NOT_ALLOWED, indent + 1); + SecretKeyType secretKeyType = cachedPublicKeyRing.getSecretKeyType(subKeyId); + if (!secretKeyType.isUsable()) { + decryptionKey = null; + log.add(LogType.MSG_DC_ASKIP_UNAVAILABLE, indent + 1); continue; } - } - - // get subkey which has been used for this encryption packet - secretEncryptionKey = secretKeyRing.getSecretKey(subKeyId); - if (!secretEncryptionKey.canEncrypt()) { - secretEncryptionKey = null; - log.add(LogType.MSG_DC_ASKIP_BAD_FLAGS, indent + 1); - continue; - } - - if (!secretEncryptionKey.getSecretKeyType().isUsable()) { - secretEncryptionKey = null; - log.add(LogType.MSG_DC_ASKIP_UNAVAILABLE, indent + 1); - continue; - } + // get actual subkey which has been used for this encryption packet + CanonicalizedSecretKeyRing canonicalizedSecretKeyRing = mProviderHelper + .getCanonicalizedSecretKeyRing(masterKeyId); + CanonicalizedSecretKey candidateDecryptionKey = canonicalizedSecretKeyRing.getSecretKey(subKeyId); - /* secret key exists in database and is allowed! */ - asymmetricPacketFound = true; + if (!candidateDecryptionKey.canEncrypt()) { + log.add(LogType.MSG_DC_ASKIP_BAD_FLAGS, indent + 1); + continue; + } - encryptedDataAsymmetric = encData; + if (secretKeyType == SecretKeyType.DIVERT_TO_CARD) { + passphrase = null; + } else if (secretKeyType == SecretKeyType.PASSPHRASE_EMPTY) { + passphrase = new Passphrase(""); + } else if (cryptoInput.hasPassphrase()) { + passphrase = cryptoInput.getPassphrase(); + } else { + // if no passphrase was explicitly set try to get it from the cache service + try { + // returns "" if key has no passphrase + passphrase = getCachedPassphrase(subKeyId); + log.add(LogType.MSG_DC_PASS_CACHED, indent + 1); + } catch (PassphraseCacheInterface.NoSecretKeyException e) { + log.add(LogType.MSG_DC_ERROR_NO_KEY, indent + 1); + return result.with(new DecryptVerifyResult(DecryptVerifyResult.RESULT_ERROR, log)); + } - if (secretEncryptionKey.getSecretKeyType() == SecretKeyType.DIVERT_TO_CARD) { - passphrase = null; - } else if (cryptoInput.hasPassphrase()) { - passphrase = cryptoInput.getPassphrase(); - } else { - // if no passphrase was explicitly set try to get it from the cache service - try { - // returns "" if key has no passphrase - passphrase = getCachedPassphrase(subKeyId); - log.add(LogType.MSG_DC_PASS_CACHED, indent + 1); - } catch (PassphraseCacheInterface.NoSecretKeyException e) { - log.add(LogType.MSG_DC_ERROR_NO_KEY, indent + 1); - return result.with(new DecryptVerifyResult(DecryptVerifyResult.RESULT_ERROR, log)); + // if passphrase was not cached, return here indicating that a passphrase is missing! + if (passphrase == null) { + log.add(LogType.MSG_DC_PENDING_PASSPHRASE, indent + 1); + return result.with(new DecryptVerifyResult(log, + RequiredInputParcel.createRequiredDecryptPassphrase(masterKeyId, subKeyId), + cryptoInput)); + } } - // if passphrase was not cached, return here indicating that a passphrase is missing! - if (passphrase == null) { - log.add(LogType.MSG_DC_PENDING_PASSPHRASE, indent + 1); - return result.with(new DecryptVerifyResult(log, - RequiredInputParcel.createRequiredDecryptPassphrase( - secretKeyRing.getMasterKeyId(), secretEncryptionKey.getKeyId()), - cryptoInput)); + // check for insecure encryption key + if ( ! PgpSecurityConstants.isSecureKey(candidateDecryptionKey)) { + log.add(LogType.MSG_DC_INSECURE_KEY, indent + 1); + result.insecureEncryptionKey = true; } - } - // check for insecure encryption key - if ( ! PgpSecurityConstants.isSecureKey(secretEncryptionKey)) { - log.add(LogType.MSG_DC_INSECURE_KEY, indent + 1); - result.insecureEncryptionKey = true; + // we're good, write down the data for later + asymmetricPacketFound = true; + encryptedDataAsymmetric = encData; + decryptionKey = candidateDecryptionKey; + + } catch (PgpKeyNotFoundException | ProviderHelper.NotFoundException e) { + // continue with the next packet in the while loop + log.add(LogType.MSG_DC_ASKIP_NO_KEY, indent + 1); + continue; } // break out of while, only decrypt the first packet where we have a key @@ -735,7 +742,7 @@ public class PgpDecryptVerifyOperation extends BaseOperation<PgpDecryptVerifyInp try { log.add(LogType.MSG_DC_UNLOCKING, indent + 1); - if (!secretEncryptionKey.unlock(passphrase)) { + if (!decryptionKey.unlock(passphrase)) { log.add(LogType.MSG_DC_ERROR_BAD_PASSPHRASE, indent + 1); return result.with(new DecryptVerifyResult(DecryptVerifyResult.RESULT_ERROR, log)); } @@ -748,7 +755,7 @@ public class PgpDecryptVerifyOperation extends BaseOperation<PgpDecryptVerifyInp updateProgress(R.string.progress_preparing_streams, currentProgress, 100); CachingDataDecryptorFactory decryptorFactory - = secretEncryptionKey.getCachingDecryptorFactory(cryptoInput); + = decryptionKey.getCachingDecryptorFactory(cryptoInput); // special case: if the decryptor does not have a session key cached for this encrypted // data, and can't actually decrypt on its own, return a pending intent @@ -757,8 +764,8 @@ public class PgpDecryptVerifyOperation extends BaseOperation<PgpDecryptVerifyInp log.add(LogType.MSG_DC_PENDING_NFC, indent + 1); return result.with(new DecryptVerifyResult(log, RequiredInputParcel.createNfcDecryptOperation( - secretEncryptionKey.getRing().getMasterKeyId(), - secretEncryptionKey.getKeyId(), encryptedDataAsymmetric.getSessionKey()[0] + decryptionKey.getRing().getMasterKeyId(), + decryptionKey.getKeyId(), encryptedDataAsymmetric.getSessionKey()[0] ), cryptoInput)); } diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpSignEncryptOperation.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpSignEncryptOperation.java index 4c3471b21..f1d4d1272 100644 --- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpSignEncryptOperation.java +++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpSignEncryptOperation.java @@ -166,12 +166,13 @@ public class PgpSignEncryptOperation extends BaseOperation { updateProgress(R.string.progress_extracting_signature_key, 0, 100); try { - // fetch the indicated master key id (the one whose name we sign in) - CanonicalizedSecretKeyRing signingKeyRing = - mProviderHelper.getCanonicalizedSecretKeyRing(input.getSignatureMasterKeyId()); - - // fetch the specific subkey to sign with, or just use the master key if none specified - signingKey = signingKeyRing.getSecretKey(input.getSignatureSubKeyId()); + long signingMasterKeyId = input.getSignatureMasterKeyId(); + long signingSubKeyId = input.getSignatureSubKeyId(); + { + CanonicalizedSecretKeyRing signingKeyRing = + mProviderHelper.getCanonicalizedSecretKeyRing(signingMasterKeyId); + signingKey = signingKeyRing.getSecretKey(input.getSignatureSubKeyId()); + } // Make sure we are allowed to sign here! if (!signingKey.canSign()) { @@ -179,7 +180,7 @@ public class PgpSignEncryptOperation extends BaseOperation { return new PgpSignEncryptResult(PgpSignEncryptResult.RESULT_ERROR, log); } - switch (signingKey.getSecretKeyType()) { + switch (mProviderHelper.getCachedPublicKeyRing(signingMasterKeyId).getSecretKeyType(signingSubKeyId)) { case DIVERT_TO_CARD: case PASSPHRASE_EMPTY: { if (!signingKey.unlock(new Passphrase())) { @@ -196,14 +197,14 @@ public class PgpSignEncryptOperation extends BaseOperation { Passphrase localPassphrase = cryptoInput.getPassphrase(); if (localPassphrase == null) { try { - localPassphrase = getCachedPassphrase(signingKeyRing.getMasterKeyId(), signingKey.getKeyId()); + localPassphrase = getCachedPassphrase(signingMasterKeyId, signingKey.getKeyId()); } catch (PassphraseCacheInterface.NoSecretKeyException ignored) { } } if (localPassphrase == null) { log.add(LogType.MSG_PSE_PENDING_PASSPHRASE, indent + 1); return new PgpSignEncryptResult(log, RequiredInputParcel.createRequiredSignPassphrase( - signingKeyRing.getMasterKeyId(), signingKey.getKeyId(), + signingMasterKeyId, signingKey.getKeyId(), cryptoInput.getSignatureTime()), cryptoInput); } if (!signingKey.unlock(localPassphrase)) { diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/CachedPublicKeyRing.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/CachedPublicKeyRing.java index 7c9ef719e..604a5a027 100644 --- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/CachedPublicKeyRing.java +++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/CachedPublicKeyRing.java @@ -74,7 +74,7 @@ public class CachedPublicKeyRing extends KeyRing { public long extractOrGetMasterKeyId() throws PgpKeyNotFoundException { // try extracting from the uri first String firstSegment = mUri.getPathSegments().get(1); - if (!firstSegment.equals("find")) try { + if (!"find".equals(firstSegment)) try { return Long.parseLong(firstSegment); } catch (NumberFormatException e) { // didn't work? oh well. diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/ProviderHelper.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/ProviderHelper.java index 1cd073717..83e2baf9a 100644 --- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/ProviderHelper.java +++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/ProviderHelper.java @@ -34,6 +34,7 @@ import org.sufficientlysecure.keychain.Constants; import org.sufficientlysecure.keychain.R; import org.sufficientlysecure.keychain.operations.results.ImportKeyResult; import org.sufficientlysecure.keychain.pgp.WrappedUserAttribute; +import org.sufficientlysecure.keychain.pgp.exception.PgpKeyNotFoundException; import org.sufficientlysecure.keychain.provider.KeychainContract.UserPackets; import org.sufficientlysecure.keychain.ui.util.KeyFormattingUtils; import org.sufficientlysecure.keychain.util.ParcelableFileCache.IteratorWithSize; @@ -254,8 +255,9 @@ public class ProviderHelper { KeyRings.MASTER_KEY_ID, FIELD_TYPE_INTEGER); } - public CachedPublicKeyRing getCachedPublicKeyRing(Uri queryUri) { - return new CachedPublicKeyRing(this, queryUri); + public CachedPublicKeyRing getCachedPublicKeyRing(Uri queryUri) throws PgpKeyNotFoundException { + long masterKeyId = new CachedPublicKeyRing(this, queryUri).extractOrGetMasterKeyId(); + return getCachedPublicKeyRing(masterKeyId); } public CachedPublicKeyRing getCachedPublicKeyRing(long id) { @@ -828,7 +830,7 @@ public class ProviderHelper { mIndent += 1; for (CanonicalizedSecretKey sub : keyRing.secretKeyIterator()) { long id = sub.getKeyId(); - SecretKeyType mode = sub.getSecretKeyType(); + SecretKeyType mode = sub.getSecretKeyTypeSuperExpensive(); values.put(Keys.HAS_SECRET, mode.getNum()); int upd = mContentResolver.update(uri, values, Keys.KEY_ID + " = ?", new String[]{Long.toString(id)}); diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/PassphraseDialogActivity.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/PassphraseDialogActivity.java index a973a67e0..88616117f 100644 --- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/PassphraseDialogActivity.java +++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/PassphraseDialogActivity.java @@ -54,6 +54,7 @@ import org.sufficientlysecure.keychain.pgp.CanonicalizedSecretKeyRing; import org.sufficientlysecure.keychain.pgp.KeyRing; import org.sufficientlysecure.keychain.pgp.exception.PgpGeneralException; import org.sufficientlysecure.keychain.pgp.exception.PgpKeyNotFoundException; +import org.sufficientlysecure.keychain.provider.CachedPublicKeyRing; import org.sufficientlysecure.keychain.provider.KeychainContract; import org.sufficientlysecure.keychain.provider.ProviderHelper; import org.sufficientlysecure.keychain.provider.ProviderHelper.NotFoundException; @@ -112,12 +113,10 @@ public class PassphraseDialogActivity extends FragmentActivity { // handle empty passphrases by directly returning an empty crypto input parcel try { - CanonicalizedSecretKeyRing pubRing = - new ProviderHelper(this).getCanonicalizedSecretKeyRing( - requiredInput.getMasterKeyId()); + CachedPublicKeyRing pubRing = + new ProviderHelper(this).getCachedPublicKeyRing(requiredInput.getMasterKeyId()); // use empty passphrase for empty passphrase - if (pubRing.getSecretKey(requiredInput.getSubKeyId()).getSecretKeyType() == - SecretKeyType.PASSPHRASE_EMPTY) { + if (pubRing.getSecretKeyType(requiredInput.getSubKeyId()) == SecretKeyType.PASSPHRASE_EMPTY) { // also return passphrase back to activity Intent returnIntent = new Intent(); cryptoInputParcel.mPassphrase = new Passphrase(""); @@ -161,7 +160,6 @@ public class PassphraseDialogActivity extends FragmentActivity { private TextView mPassphraseText; private EditText[] mBackupCodeEditText; - private CanonicalizedSecretKeyRing mSecretRing = null; private boolean mIsCancelled = false; private RequiredInputParcel mRequiredInput; @@ -233,24 +231,20 @@ public class PassphraseDialogActivity extends FragmentActivity { long subKeyId = mRequiredInput.getSubKeyId(); ProviderHelper helper = new ProviderHelper(activity); - mSecretRing = helper.getCanonicalizedSecretKeyRing( + CachedPublicKeyRing cachedPublicKeyRing = helper.getCachedPublicKeyRing( KeychainContract.KeyRings.buildUnifiedKeyRingsFindBySubkeyUri(subKeyId)); // yes the inner try/catch block is necessary, otherwise the final variable // above can't be statically verified to have been set in all cases because // the catch clause doesn't return. - try { - String mainUserId = mSecretRing.getPrimaryUserIdWithFallback(); - KeyRing.UserId mainUserIdSplit = KeyRing.splitUserId(mainUserId); - if (mainUserIdSplit.name != null) { - userId = mainUserIdSplit.name; - } else { - userId = getString(R.string.user_id_no_name); - } - } catch (PgpKeyNotFoundException e) { - userId = null; + String mainUserId = cachedPublicKeyRing.getPrimaryUserIdWithFallback(); + KeyRing.UserId mainUserIdSplit = KeyRing.splitUserId(mainUserId); + if (mainUserIdSplit.name != null) { + userId = mainUserIdSplit.name; + } else { + userId = getString(R.string.user_id_no_name); } - keyType = mSecretRing.getSecretKey(subKeyId).getSecretKeyType(); + keyType = cachedPublicKeyRing.getSecretKeyType(subKeyId); switch (keyType) { case PASSPHRASE: message = getString(R.string.passphrase_for, userId); @@ -271,7 +265,7 @@ public class PassphraseDialogActivity extends FragmentActivity { throw new AssertionError("Unhandled SecretKeyType (should not happen)"); } - } catch (ProviderHelper.NotFoundException e) { + } catch (PgpKeyNotFoundException | ProviderHelper.NotFoundException e) { alert.setTitle(R.string.title_key_not_found); alert.setMessage(getString(R.string.key_not_found, mRequiredInput.getSubKeyId())); alert.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() { @@ -389,7 +383,7 @@ public class PassphraseDialogActivity extends FragmentActivity { final int timeToLiveSeconds = mTimeToLiveSpinner.getSelectedTimeToLive(); // Early breakout if we are dealing with a symmetric key - if (mSecretRing == null) { + if (mRequiredInput.mType == RequiredInputType.PASSPHRASE_SYMMETRIC) { if (!mRequiredInput.mSkipCaching) { PassphraseCacheService.addCachedPassphrase(getActivity(), Constants.key.symmetric, Constants.key.symmetric, passphrase, @@ -403,32 +397,48 @@ public class PassphraseDialogActivity extends FragmentActivity { mLayout.setDisplayedChild(1); positive.setEnabled(false); - new AsyncTask<Void, Void, Boolean>() { + new AsyncTask<Void, Void, CanonicalizedSecretKey>() { + @Override - protected Boolean doInBackground(Void... params) { + protected CanonicalizedSecretKey doInBackground(Void... params) { try { - // wait some 100ms here, give the user time to appreciate the progress bar - try { - Thread.sleep(100); - } catch (InterruptedException e) { - // never mind + long timeBeforeOperation = System.currentTimeMillis(); + + Long subKeyId = mRequiredInput.getSubKeyId(); + CanonicalizedSecretKeyRing secretKeyRing = + new ProviderHelper(getActivity()).getCanonicalizedSecretKeyRing( + KeychainContract.KeyRings.buildUnifiedKeyRingsFindBySubkeyUri(subKeyId)); + CanonicalizedSecretKey secretKeyToUnlock = + secretKeyRing.getSecretKey(subKeyId); + + // this is the operation may take a very long time (100ms to several seconds!) + boolean unlockSucceeded = secretKeyToUnlock.unlock(passphrase); + + // if it didn't take that long, give the user time to appreciate the progress bar + long operationTime = System.currentTimeMillis() -timeBeforeOperation; + if (operationTime < 100) { + try { + Thread.sleep(100 -operationTime); + } catch (InterruptedException e) { + // ignore + } } - // make sure this unlocks - return mSecretRing.getSecretKey(mRequiredInput.getSubKeyId()).unlock(passphrase); - } catch (PgpGeneralException e) { + + return unlockSucceeded ? secretKeyToUnlock : null; + } catch (NotFoundException | PgpGeneralException e) { Toast.makeText(getActivity(), R.string.error_could_not_extract_private_key, Toast.LENGTH_SHORT).show(); getActivity().setResult(RESULT_CANCELED); dismiss(); getActivity().finish(); - return false; + return null; } } /** Handle a good or bad passphrase. This happens in the UI thread! */ @Override - protected void onPostExecute(Boolean result) { + protected void onPostExecute(CanonicalizedSecretKey result) { super.onPostExecute(result); // if we were cancelled in the meantime, the result isn't relevant anymore @@ -437,7 +447,7 @@ public class PassphraseDialogActivity extends FragmentActivity { } // if the passphrase was wrong, reset and re-enable the dialogue - if (!result) { + if (result == null) { mPassphraseEditText.setText(""); mPassphraseEditText.setError(getString(R.string.wrong_passphrase)); mLayout.setDisplayedChild(0); @@ -455,8 +465,8 @@ public class PassphraseDialogActivity extends FragmentActivity { try { PassphraseCacheService.addCachedPassphrase(getActivity(), - mSecretRing.getMasterKeyId(), mRequiredInput.getSubKeyId(), passphrase, - mSecretRing.getPrimaryUserIdWithFallback(), timeToLiveSeconds); + mRequiredInput.getMasterKeyId(), mRequiredInput.getSubKeyId(), passphrase, + result.getRing().getPrimaryUserIdWithFallback(), timeToLiveSeconds); } catch (PgpKeyNotFoundException e) { Log.e(Constants.TAG, "adding of a passphrase failed", e); } diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/Passphrase.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/Passphrase.java index fe42c7a2c..b49b30d1d 100644 --- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/Passphrase.java +++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/Passphrase.java @@ -1,5 +1,6 @@ /* * Copyright (C) 2015 Dominik Schürmann <dominik@dominikschuermann.de> + * Copyright (C) 2016 Vincent Breitmoser <look@my.amazin.horse> * * 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 @@ -22,13 +23,23 @@ import android.os.Parcelable; import android.text.Editable; import android.widget.EditText; +import org.bouncycastle.bcpg.S2K; import org.sufficientlysecure.keychain.Constants; +import org.sufficientlysecure.keychain.pgp.ComparableS2K; import java.util.Arrays; +import java.util.HashMap; +import java.util.Map.Entry; + /** - * Passwords should not be stored as Strings in memory. - * This class wraps a char[] that can be erased after it is no longer used. + * This class wraps a char[] array that is overwritten before the object is freed, to avoid + * keeping passphrases in memory as much as possible. + * + * In addition to the raw passphrases, this class can cache the session key output of an applied + * S2K algorithm for a given set of S2K parameters. Since S2K operations are very expensive, this + * mechanism should be used to cache session keys whenever possible. + * * See also: * <p/> * http://docs.oracle.com/javase/6/docs/technotes/guides/security/crypto/CryptoSpec.html#PBEEx @@ -38,6 +49,7 @@ import java.util.Arrays; */ public class Passphrase implements Parcelable { private char[] mPassphrase; + private HashMap<ComparableS2K, byte[]> mCachedSessionKeys; /** * According to http://stackoverflow.com/a/15844273 EditText is not using String internally @@ -87,8 +99,24 @@ public class Passphrase implements Parcelable { return mPassphrase.length; } - public char charAt(int index) { - return mPassphrase[index]; + /** @return A cached session key, or null if none exists for the given parameters. */ + public byte[] getCachedSessionKeyForParameters(int keyEncryptionAlgorithm, S2K s2k) { + if (mCachedSessionKeys == null) { + return null; + } + return mCachedSessionKeys.get(new ComparableS2K(keyEncryptionAlgorithm, s2k)); + } + + /** Adds a session key for a set of s2k parameters to this Passphrase object's + * cache. The caller should make sure that the supplied session key is the result + * of an S2K operation applied to exactly the passphrase stored by this object + * with the given parameters. + */ + public void addCachedSessionKeyForParameters(int keyEncryptionAlgorithm, S2K s2k, byte[] sessionKey) { + if (mCachedSessionKeys == null) { + mCachedSessionKeys = new HashMap<>(); + } + mCachedSessionKeys.put(new ComparableS2K(keyEncryptionAlgorithm, s2k), sessionKey); } /** @@ -98,6 +126,12 @@ public class Passphrase implements Parcelable { if (mPassphrase != null) { Arrays.fill(mPassphrase, ' '); } + if (mCachedSessionKeys == null) { + return; + } + for (byte[] cachedSessionKey : mCachedSessionKeys.values()) { + Arrays.fill(cachedSessionKey, (byte) 0); + } } @Override @@ -144,10 +178,29 @@ public class Passphrase implements Parcelable { private Passphrase(Parcel source) { mPassphrase = source.createCharArray(); + int size = source.readInt(); + if (size == 0) { + return; + } + mCachedSessionKeys = new HashMap<>(size); + for (int i = 0; i < size; i++) { + ComparableS2K cachedS2K = source.readParcelable(getClass().getClassLoader()); + byte[] cachedSessionKey = source.createByteArray(); + mCachedSessionKeys.put(cachedS2K, cachedSessionKey); + } } public void writeToParcel(Parcel dest, int flags) { dest.writeCharArray(mPassphrase); + if (mCachedSessionKeys == null || mCachedSessionKeys.isEmpty()) { + dest.writeInt(0); + return; + } + dest.writeInt(mCachedSessionKeys.size()); + for (Entry<ComparableS2K,byte[]> entry : mCachedSessionKeys.entrySet()) { + dest.writeParcelable(entry.getKey(), 0); + dest.writeByteArray(entry.getValue()); + } } public static final Creator<Passphrase> CREATOR = new Creator<Passphrase>() { |