/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package com.doplgangr.secrecy.FileSystem;
/**
* This is an alias of a FILE in the secrecy system.
*
*/
import android.graphics.Bitmap;
import com.doplgangr.secrecy.Config;
import com.doplgangr.secrecy.Util;
import org.apache.commons.io.FilenameUtils;
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.io.Serializable;
import java.nio.ByteBuffer;
import java.nio.channels.Channels;
import java.nio.channels.FileChannel;
import java.nio.channels.ReadableByteChannel;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import javax.crypto.CipherInputStream;
public class File implements Serializable {
public static final String NAME = "FILENAME";
public static final String TYPE = "FILETYPE";
public static final String FILETIMESTAMP = "FILETIMESTAMP";
public static final String FILESIZE = "FILESIZE";
public Boolean decrypting = false;
private String name;
private String size;
private Date Timestamp;
private String FileType;
private java.io.File file;
private java.io.File thumbnailRealFile;
private Bitmap thumb = null;
private Boolean invalidFile = false;
private String key;
public File(java.io.File file, String secret) {
if (file.exists()) {
name = FilenameUtils.getBaseName(file.getName());
try {
name = Base64Coder.decodeString(name); //if name is invalid, return original name
} catch (IllegalArgumentException ignored) {
}
FileType = FilenameUtils.getExtension(file.getName());
this.file = file;
this.key = secret;
String path = file.getParent();
this.size = humanReadableByteCount(file.length());
thumbnailRealFile = new java.io.File(path + "/_thumb" + file.getName());
Timestamp = new Date(file.lastModified());
} else {
invalidFile = true;
}
}
private static String humanReadableByteCount(long bytes) {
int unit = 1024;
if (bytes < unit) return bytes + " B";
int exp = (int) (Math.log(bytes) / Math.log(unit));
char pre = ("KMGTPE").charAt(exp - 1);
return String.format("%.1f %sB", bytes / Math.pow(unit, exp), pre);
}
public String getName() {
return name;
}
public String getSize() {
return size;
}
public Bitmap getThumb(int size) {
File thumbnailFile = new File(thumbnailRealFile, key);
if ((!thumbnailFile.invalidFile) && (thumb == null)) {
CipherInputStream streamThumb = thumbnailFile.readStream(new CryptStateListener() {
@Override
public void updateProgress(int progress) {
}
@Override
public void setMax(int max) {
}
@Override
public void onFailed(int statCode) {
}
@Override
public void Finished() {
}
});
this.thumb = storage.getThumbnailfromStream(streamThumb, size);
}
return thumb;
}
public boolean hasThumbnail() {
File thumbnailFile = new File(thumbnailRealFile, key);
return (!thumbnailFile.invalidFile);
}
public String getType() {
return FileType;
}
public java.io.File getFile() {
return file;
}
public String getTimestamp() {
DateFormat df = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
if (Timestamp == null)
return "";
return df.format(Timestamp);
}
public java.io.File readFile(CryptStateListener listener) {
decrypting = true;
InputStream is = null;
OutputStream out = null;
java.io.File outputFile = null;
try {
outputFile = java.io.File.createTempFile("tmp" + name, "." + FileType, storage.getTempFolder());
outputFile.mkdirs();
outputFile.createNewFile();
AES_Encryptor enc = new AES_Encryptor(key);
is = new CipherInputStream(new FileInputStream(file), enc.decryptstream());
listener.setMax((int) file.length());
ReadableByteChannel inChannel = Channels.newChannel(is);
FileChannel outChannel = new FileOutputStream(outputFile).getChannel();
ByteBuffer byteBuffer = ByteBuffer.allocate(Config.bufferSize);
while (inChannel.read(byteBuffer) >= 0 || byteBuffer.position() > 0) {
byteBuffer.flip();
outChannel.write(byteBuffer);
byteBuffer.compact();
listener.updateProgress((int) outChannel.size());
}
inChannel.close();
outChannel.close();
Util.log(outputFile.getName(), outputFile.length());
return outputFile;
} catch (FileNotFoundException e) {
listener.onFailed(2);
Util.log("Encrypted File is missing", e.getMessage());
} catch (IOException e) {
Util.log("IO Exception while decrypting", e.getMessage());
if (e.getMessage().contains("pad block corrupted"))
listener.onFailed(1);
else
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
} finally {
listener.Finished();
decrypting = false;
try {
if (is != null) {
is.close();
}
if (out != null) {
out.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
// An error occured. Too Bad
if (outputFile != null)
storage.purgeFile(outputFile);
return null;
}
public CipherInputStream readStream(CryptStateListener listener) {
try {
AES_Encryptor enc = new AES_Encryptor(key);
return new CipherInputStream(new FileInputStream(file), enc.decryptstream()) {
@Override
public int available() throws IOException {
// The cipher input stream always returns 0 because
// in certain implementations (padded ciphers), a
// standard implementation may not be able to
// accurately determine the number of available
// bytes. In our case, however, we are not using a
// padded cipher and the number of available bytes
// 'should' be the same as the number available from
// the underlying stream.
int available = in.available();
Util.log("**CipherInputStream.available: "
+ available);
return available;
}
};
} catch (FileNotFoundException e) {
listener.onFailed(2);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
public void delete() {
storage.purgeFile(file);
File thumbnailFile = new File(thumbnailRealFile, key);
if (!thumbnailFile.invalidFile)
thumbnailFile.delete();
}
}