Merge branch 'feature/422-save-pw-linux' into develop

fixes #422

main/keychain/src/main/java/org/cryptomator/keychain/GnomeKeyringAccess.java

@@ -0,0 +1,9 @@
+package org.cryptomator.keychain;
+
+public interface GnomeKeyringAccess {
+	public void storePassword(String key, CharSequence passphrase);
+
+	public char[] loadPassword(String key);
+
+	public void deletePassword(String key);
+}

main/keychain/src/main/java/org/cryptomator/keychain/GnomeKeyringAccessImpl.java

@@ -0,0 +1,52 @@
+package org.cryptomator.keychain;
+
+import org.freedesktop.secret.simple.SimpleCollection;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class GnomeKeyringAccessImpl implements GnomeKeyringAccess {
+	private static final Logger LOG = LoggerFactory.getLogger(GnomeKeyringAccessImpl.class);
+	private SimpleCollection keyring;
+
+	public GnomeKeyringAccessImpl() {
+		try {
+			keyring = new SimpleCollection();
+		} catch (IOException e) {
+			LOG.error("D-Bus reports a problem.", e);
+		}
+	}
+
+	public void storePassword(String key, CharSequence passphrase) {
+		List<String> list = keyring.getItems(createAttributes(key));
+		if (list == null) {
+			keyring.createItem("Cryptomator", passphrase, createAttributes(key));
+		}
+	}
+
+	public char[] loadPassword(String key) {
+		List<String> list = keyring.getItems(createAttributes(key));
+		if (list != null) {
+			return keyring.getSecret(list.get(0));
+		} else {
+			return null;
+		}
+	}
+
+	public void deletePassword(String key) {
+		List<String> list = keyring.getItems(createAttributes(key));
+		if (list != null) {
+			keyring.deleteItem(list.get(0));
+		}
+	}
+
+	private Map<String, String> createAttributes(String key) {
+		Map<String, String> attributes = new HashMap();
+		attributes.put("Vault", key);
+		return attributes;
+	}
+}

main/keychain/src/main/java/org/cryptomator/keychain/KeychainModule.java

@@ -31,8 +31,8 @@ public class KeychainModule {
 
 	@Provides
 	@ElementsIntoSet
-	Set<KeychainAccessStrategy> provideKeychainAccessStrategies(MacSystemKeychainAccess macKeychain, WindowsProtectedKeychainAccess winKeychain) {
-		return Sets.newHashSet(macKeychain, winKeychain);
+	Set<KeychainAccessStrategy> provideKeychainAccessStrategies(MacSystemKeychainAccess macKeychain, WindowsProtectedKeychainAccess winKeychain, LinuxSecretServiceAccess linKeychain) {
+		return Sets.newHashSet(macKeychain, winKeychain, linKeychain);
 	}
 
 	@Provides

main/keychain/src/main/java/org/cryptomator/keychain/LinuxKeychainTester.java

@@ -0,0 +1,25 @@
+package org.cryptomator.keychain;
+
+import java.util.Optional;
+
+public class LinuxKeychainTester {
+	public static boolean secretServiceIsAvailable() {
+		try {
+			Class.forName("org.freedesktop.secret.simple.SimpleCollection");
+			return true;
+		} catch (ClassNotFoundException e) {
+			return false;
+		}
+	}
+
+	public static Optional<GnomeKeyringAccess> getSecretService() {
+		if (!secretServiceIsAvailable()) return Optional.empty();
+		try {
+			Class clazz = Class.forName("org.cryptomator.keychain.GnomeKeyringAccessImpl");
+			GnomeKeyringAccess keyring = (GnomeKeyringAccess) clazz.getDeclaredConstructor().newInstance();
+			return Optional.of(keyring);
+		} catch (Exception e) {
+			return Optional.empty();
+		}
+	}
+}

main/keychain/src/main/java/org/cryptomator/keychain/LinuxSecretServiceAccess.java

@@ -0,0 +1,39 @@
+package org.cryptomator.keychain;
+
+import com.google.common.base.Preconditions;
+import org.apache.commons.lang3.SystemUtils;
+
+import javax.inject.Inject;
+import java.util.Optional;
+
+public class LinuxSecretServiceAccess implements KeychainAccessStrategy {
+	private final Optional<GnomeKeyringAccess> gnomeLoginKeyring;
+
+	@Inject
+	public LinuxSecretServiceAccess() {
+		gnomeLoginKeyring = LinuxKeychainTester.getSecretService();
+	}
+
+	@Override
+	public boolean isSupported() {
+		return SystemUtils.IS_OS_LINUX && LinuxKeychainTester.getSecretService().isPresent();
+	}
+
+	@Override
+	public void storePassphrase(String key, CharSequence passphrase) {
+		Preconditions.checkState(gnomeLoginKeyring.isPresent());
+		gnomeLoginKeyring.get().storePassword(key, passphrase);
+	}
+
+	@Override
+	public char[] loadPassphrase(String key) {
+		Preconditions.checkState(gnomeLoginKeyring.isPresent());
+		return gnomeLoginKeyring.get().loadPassword(key);
+	}
+
+	@Override
+	public void deletePassphrase(String key) {
+		Preconditions.checkState(gnomeLoginKeyring.isPresent());
+		gnomeLoginKeyring.get().deletePassword(key);
+	}
+}

main/keychain/src/test/java/org/cryptomator/keychain/TestKeychainModule.java

@@ -7,13 +7,11 @@ package org.cryptomator.keychain;
 
 import java.util.Set;
 
-import com.google.common.collect.Sets;
-
 public class TestKeychainModule extends KeychainModule {
 
 	@Override
-	Set<KeychainAccessStrategy> provideKeychainAccessStrategies(MacSystemKeychainAccess macKeychain, WindowsProtectedKeychainAccess winKeychain) {
-		return Sets.newHashSet(new MapKeychainAccess());
+	Set<KeychainAccessStrategy> provideKeychainAccessStrategies(MacSystemKeychainAccess macKeychain, WindowsProtectedKeychainAccess winKeychain, LinuxSecretServiceAccess linKeychain) {
+		return Set.of(new MapKeychainAccess());
 	}
 
 }