public string DecriptFile(string filename, string name)
{
Java.IO.File extStore = Android.OS.Environment.GetExternalStoragePublicDirectory("Temp");
Android.Util.Log.Error("Decryption Started", extStore + "");
FileInputStream fis = new FileInputStream(extStore + "/" + filename);
// createFile(filename, extStore);
FileOutputStream fos = new FileOutputStream(extStore + "/" + "decrypted" + filename, false);
System.IO.FileStream fs = System.IO.File.OpenWrite(extStore + "/" + name);
Cipher cipher = Cipher.GetInstance("AES/CBC/PKCS5Padding");
byte[] raw = System.Text.Encoding.Default.GetBytes(sKey);
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
IvParameterSpec iv = new IvParameterSpec(System.Text.Encoding.Default.GetBytes(ivParameter));//
cipher.Init(CipherMode.DecryptMode, skeySpec, iv);
CipherOutputStream cos = new CipherOutputStream(fs, cipher);
int b;
byte[] d = new byte[1024 * 1024];
while ((b = fis.Read(d)) != -1)
{
cos.Write(d, 0, b);
}
System.IO.File.Delete(extStore + "/" + "decrypted" + filename);
Android.Util.Log.Error("Decryption Ended", extStore + "/" + "decrypted" + name);
return(extStore.ToString());
//return d;
}
public void decrypt()
{
try
{
string path = "/storage/emulated/0/jukebox/Songs";
// Log.d("Files", "Path: " + path);
Java.IO.File directory = new Java.IO.File(path);
Java.IO.File[] files = directory.ListFiles();
// Log.d("Files", "Size: " + files.length);
for (int i = 0; i < files.Length; i++)
{
// Log.d("Files", "FileName:" + files[i].getName());
var fileName = files[i].Name;
int index = fileName.LastIndexOf(".");
if (index > 0)
{
fileName = fileName.Substring(0, index);
}
//Java.IO.File extStore = Android.OS.Environment.GetExternalStoragePublicDirectory(Android.OS.Environment.DirectoryMovies);
Android.Util.Log.Error("Decryption Started", directory + "");
FileInputStream fis = new FileInputStream(directory + "/" + fileName + ".aes");
createFile(files[i].Name, directory);
FileOutputStream fos = new FileOutputStream(directory + "/" + "decrypted" + fileName, false);
System.IO.FileStream fs = System.IO.File.OpenWrite(directory + "/" + "decrypted" + fileName);
// Create cipher
Cipher cipher = Cipher.GetInstance("AES/CBC/PKCS5Padding");
byte[] raw = System.Text.Encoding.Default.GetBytes(sKey);
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
IvParameterSpec iv = new IvParameterSpec(System.Text.Encoding.Default.GetBytes(ivParameter));//
cipher.Init(Javax.Crypto.CipherMode.DecryptMode, skeySpec, iv);
startTime = System.DateTime.Now.Millisecond;
CipherOutputStream cos = new CipherOutputStream(fs, cipher);
int b;
byte[] d = new byte[1024 * 1024];
while ((b = fis.Read(d)) != -1)
{
cos.Write(d, 0, b);
}
stopTime = System.DateTime.Now.Millisecond;
Android.Util.Log.Error("Decryption Ended", directory + "/" + "decrypted" + fileName);
Android.Util.Log.Error("Time Elapsed", ((stopTime - startTime) / 1000.0) + "");
cos.Flush();
cos.Close();
fis.Close();
}
}
catch (Exception e)
{
Android.Util.Log.Error("lv", e.Message);
}
}
public void decrypt(string filename)
{
try
{
Java.IO.File extStore = new Java.IO.File("/storage/emulated/0/jukebox/Songs");
Android.Util.Log.Error("Decryption Started", extStore + "");
FileInputStream fis = new FileInputStream(extStore + "/" + filename + ".aes");
createFile(filename, extStore);
FileOutputStream fos = new FileOutputStream(extStore + "/" + "decrypted" + filename, false);
System.IO.FileStream fs = System.IO.File.OpenWrite(extStore + "/" + "decrypted" + filename);
// Create cipher
Cipher cipher = Cipher.GetInstance("AES/CBC/PKCS5Padding");
byte[] raw = System.Text.Encoding.Default.GetBytes(sKey);
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
IvParameterSpec iv = new IvParameterSpec(System.Text.Encoding.Default.GetBytes(ivParameter));//
cipher.Init(Javax.Crypto.CipherMode.DecryptMode, skeySpec, iv);
startTime = System.DateTime.Now.Millisecond;
CipherOutputStream cos = new CipherOutputStream(fs, cipher);
Java.IO.File file = new Java.IO.File("/storage/emulated/0/jukebox/Songs" + "/" + filename);
if (file.Delete())
{
Android.Util.Log.Error("File Deteted", extStore + filename);
}
else
{
Android.Util.Log.Error("File Doesn't exists", extStore + filename);
}
int b;
byte[] d = new byte[1024 * 1024];
while ((b = fis.Read(d)) != -1)
{
cos.Write(d, 0, b);
}
stopTime = System.DateTime.Now.Millisecond;
Android.Util.Log.Error("Decryption Ended", extStore + "/" + "decrypted" + filename);
Android.Util.Log.Error("Time Elapsed", ((stopTime - startTime) / 1000.0) + "");
cos.Flush();
cos.Close();
fis.Close();
}
catch (Exception e)
{
Android.Util.Log.Error("lv", e.Message);
}
}
public virtual void encrypt(Stream paramInputStream, Stream paramOutputStream)
{
try
{
paramOutputStream = new CipherOutputStream(paramOutputStream, this.ecipher);
int i = 0;
while ((i = paramInputStream.Read(this.buf, 0, this.buf.Length)) >= 0)
{
paramOutputStream.Write(this.buf, 0, i);
}
paramOutputStream.Close();
}
catch (IOException)
{
}
}
private byte[] RSAEncrypt(byte[] secret)
{
KeyStore.PrivateKeyEntry privateKeyEntry = (KeyStore.PrivateKeyEntry)_keyStore.GetEntry(_secureStoredKeyAlias, null);
// Encrypt the text
Cipher inputCipher = Cipher.GetInstance(_RSAMode, "AndroidOpenSSL");
inputCipher.Init(CipherMode.EncryptMode, privateKeyEntry.Certificate.PublicKey);
MemoryStream outputStream = new MemoryStream();
CipherOutputStream cipherOutputStream = new CipherOutputStream(outputStream, inputCipher);
cipherOutputStream.Write(secret);
cipherOutputStream.Close();
return(outputStream.ToArray());
}
public string EncryptKey(string privKey)
{
KeyStore.PrivateKeyEntry privateKeyEntry = (KeyStore.PrivateKeyEntry)_keyStore.GetEntry(_alias, null);
var publicKey = privateKeyEntry.Certificate.PublicKey;
Cipher cipher = Cipher.GetInstance("RSA/ECB/PKCS1Padding", "AndroidOpenSSL");
cipher.Init(CipherMode.EncryptMode, publicKey);//
MemoryStream outputStream = new MemoryStream();
CipherOutputStream cipherOutputStream = new CipherOutputStream(
outputStream, cipher);
cipherOutputStream.Write(Encoding.UTF8.GetBytes(privKey));
cipherOutputStream.Close();
byte[] encryptedBytes = outputStream.ToArray();
return(Nethereum.Hex.HexConvertors.Extensions.HexByteConvertorExtensions.ToHexCompact(encryptedBytes));
}
public CipherStreamAdapter(CipherOutputStream output)
{
_output = output;
_adapter = new OutputStreamInvoker(output);
}
