support for pgp files

src/main/java/eu/siacs/conversations/crypto/PgpEngine.java

@@ -80,12 +80,13 @@ public class PgpEngine {
                     }
 				}
 			});
-		} else if (message.getType() == Message.TYPE_IMAGE) {
+		} else if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE) {
 			try {
 				final DownloadableFile inputFile = this.mXmppConnectionService
 						.getFileBackend().getFile(message, false);
 				final DownloadableFile outputFile = this.mXmppConnectionService
 						.getFileBackend().getFile(message, true);
+				outputFile.getParentFile().mkdirs();
 				outputFile.createNewFile();
 				InputStream is = new FileInputStream(inputFile);
 				OutputStream os = new FileOutputStream(outputFile);
@@ -199,12 +200,13 @@ public class PgpEngine {
 					}
 				}
 			});
-		} else if (message.getType() == Message.TYPE_IMAGE) {
+		} else if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE) {
 			try {
 				DownloadableFile inputFile = this.mXmppConnectionService
 						.getFileBackend().getFile(message, true);
 				DownloadableFile outputFile = this.mXmppConnectionService
 						.getFileBackend().getFile(message, false);
+				outputFile.getParentFile().mkdirs();
 				outputFile.createNewFile();
 				InputStream is = new FileInputStream(inputFile);
 				OutputStream os = new FileOutputStream(outputFile);

src/main/java/eu/siacs/conversations/persistance/FileBackend.java

@@ -2,14 +2,12 @@ package eu.siacs.conversations.persistance;
 
 import java.io.ByteArrayOutputStream;
 import java.io.File;
-import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.net.URL;
-import java.net.URLConnection;
 import java.security.DigestOutputStream;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
@@ -17,7 +15,6 @@ import java.text.SimpleDateFormat;
 import java.util.Date;
 import java.util.Locale;
 
-import android.content.ContentResolver;
 import android.database.Cursor;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
@@ -60,30 +57,36 @@ public class FileBackend {
 
 	public DownloadableFile getFile(Message message, boolean decrypted) {
 		String path = message.getRelativeFilePath();
+		if (!decrypted && (message.getEncryption() == Message.ENCRYPTION_PGP || message.getEncryption() == Message.ENCRYPTION_DECRYPTED)) {
+			String extension;
 			if (path != null && !path.isEmpty()) {
+				String[] parts = path.split("\\.");
+				extension = "."+parts[parts.length - 1];
+			} else if (message.getType() == Message.TYPE_IMAGE) {
+				extension = ".webp";
+			} else {
+				extension = "";
+			}
+			return new DownloadableFile(getConversationsFileDirectory()+message.getUuid()+extension+".pgp");
+		} else if (path != null && !path.isEmpty()) {
 			if (path.startsWith("/")) {
 				return new DownloadableFile(path);
 			} else {
-				return new DownloadableFile(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)+"/"+path);
+				return new DownloadableFile(getConversationsFileDirectory()+path);
 			}
 		} else {
 			StringBuilder filename = new StringBuilder();
-			filename.append(getConversationsDirectory());
+			filename.append(getConversationsImageDirectory());
-			filename.append(message.getUuid());
+			filename.append(message.getUuid()+".webp");
-			if ((decrypted) || (message.getEncryption() == Message.ENCRYPTION_NONE)) {
-				filename.append(".webp");
-			} else {
-				if (message.getEncryption() == Message.ENCRYPTION_OTR) {
-					filename.append(".webp");
-				} else {
-					filename.append(".webp.pgp");
-				}
-			}
 			return new DownloadableFile(filename.toString());
 		}
 	}
 
-	public static String getConversationsDirectory() {
+	public static String getConversationsFileDirectory() {
+		return  Environment.getExternalStorageDirectory().getAbsolutePath()+"/Conversations/";
+	}
+
+	public static String getConversationsImageDirectory() {
 		return Environment.getExternalStoragePublicDirectory(
 			Environment.DIRECTORY_PICTURES).getAbsolutePath()
 			+ "/Conversations/";

src/main/java/eu/siacs/conversations/services/XmppConnectionService.java

@@ -211,7 +211,7 @@ public class XmppConnectionService extends Service {
 	private Integer rosterChangedListenerCount = 0;
 	private SecureRandom mRandom;
 	private FileObserver fileObserver = new FileObserver(
-			FileBackend.getConversationsDirectory()) {
+			FileBackend.getConversationsImageDirectory()) {
 
 		@Override
 		public void onEvent(int event, String path) {
@@ -311,7 +311,11 @@ public class XmppConnectionService extends Service {
 		if (path!=null) {
 			message.setRelativeFilePath(path);
 			getFileBackend().updateFileParams(message);
+			if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
+				getPgpEngine().encrypt(message, callback);
+			} else {
 				callback.success(message);
+			}
 		} else {
 			new Thread(new Runnable() {
 				@Override
@@ -319,7 +323,11 @@ public class XmppConnectionService extends Service {
 					try {
 						getFileBackend().copyFileToPrivateStorage(message, uri);
 						getFileBackend().updateFileParams(message);
+						if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
+							getPgpEngine().encrypt(message, callback);
+						} else {
 							callback.success(message);
+						}
 					} catch (FileBackend.FileCopyException e) {
 						callback.error(e.getResId(),message);
 					}

src/main/java/eu/siacs/conversations/xmpp/jingle/JingleConnection.java

@@ -306,6 +306,8 @@ public class JingleConnection implements Downloadable {
 						suffix = parts[parts.length - 1];
 						if (message.getEncryption() == Message.ENCRYPTION_OTR  && suffix.endsWith(".otr")) {
 							suffix = suffix.substring(0,suffix.length() - 4);
+						} else if (message.getEncryption() == Message.ENCRYPTION_PGP && (suffix.endsWith(".pgp") || suffix.endsWith(".gpg"))) {
+							suffix = suffix.substring(0,suffix.length() - 4);
 						}
 					}
 					message.setRelativeFilePath(message.getUuid()+"_"+suffix);