mirror of
https://github.com/Kunzisoft/KeePassDX.git
synced 2025-12-04 15:49:33 +01:00
96 lines
3.1 KiB
Java
96 lines
3.1 KiB
Java
/*
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* Copyright 2017 Brian Pellin, Jeremy Jamet / Kunzisoft.
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*
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* This file is part of KeePassDroid.
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*
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* KeePassDroid is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* KeePassDroid is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with KeePassDroid. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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package com.keepassdroid.crypto;
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import java.security.InvalidAlgorithmParameterException;
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import java.security.InvalidKeyException;
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import java.security.NoSuchAlgorithmException;
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import java.security.Security;
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import java.util.UUID;
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import javax.crypto.Cipher;
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import javax.crypto.NoSuchPaddingException;
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import javax.crypto.spec.IvParameterSpec;
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import javax.crypto.spec.SecretKeySpec;
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import android.os.Build;
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import com.keepassdroid.crypto.engine.AesEngine;
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import com.keepassdroid.crypto.engine.CipherEngine;
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import com.keepassdroid.crypto.engine.TwofishEngine;
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import com.keepassdroid.utils.Types;
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import org.spongycastle.jce.provider.BouncyCastleProvider;
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public class CipherFactory {
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private static boolean blacklistInit = false;
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private static boolean blacklisted;
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static {
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Security.addProvider(new BouncyCastleProvider());
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}
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public static Cipher getInstance(String transformation) throws NoSuchAlgorithmException, NoSuchPaddingException {
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return getInstance(transformation, false);
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}
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public static Cipher getInstance(String transformation, boolean androidOverride) throws NoSuchAlgorithmException, NoSuchPaddingException {
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// Return the native AES if it is possible
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if ( (!deviceBlacklisted()) && (!androidOverride) && hasNativeImplementation(transformation) && NativeLib.loaded() ) {
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return Cipher.getInstance(transformation, new AESProvider());
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} else {
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return Cipher.getInstance(transformation);
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}
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}
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public static boolean deviceBlacklisted() {
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if (!blacklistInit) {
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blacklistInit = true;
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// The Acer Iconia A500 is special and seems to always crash in the native crypto libraries
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blacklisted = Build.MODEL.equals("A500");
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}
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return blacklisted;
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}
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private static boolean hasNativeImplementation(String transformation) {
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return transformation.equals("AES/CBC/PKCS5Padding");
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}
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/** Generate appropriate cipher based on KeePass 2.x UUID's
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* @param uuid
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* @return
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* @throws NoSuchPaddingException
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* @throws NoSuchAlgorithmException
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* @throws InvalidAlgorithmParameterException
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* @throws InvalidKeyException
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*/
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public static CipherEngine getInstance(UUID uuid) throws NoSuchAlgorithmException {
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if ( uuid.equals(AesEngine.CIPHER_UUID) ) {
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return new AesEngine();
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} else if ( uuid.equals(TwofishEngine.CIPHER_UUID) ) {
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return new TwofishEngine();
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}
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throw new NoSuchAlgorithmException("UUID unrecognized.");
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}
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}
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