hi all,
i am trying the File encryption using AES on android but there is a
weird exception occured everytime,i am not able to find out the
solution for this exception.
my code for encryption is:
public void encrypt(File file,String aesKey) throws Exception
{
try
{
byte[] byteKey = aesKey.getBytes("UTF8");
KeySpec ks = new SecretKeySpec(byteKey,"AES");
SecretKeyFactory skf =
SecretKeyFactory.getInstance("AES");
SecretKey sk = skf.generateSecret(ks);
aspec = new IvParameterSpec(ivector);
encCipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
encCipher.init(Cipher.ENCRYPT_MODE, sk);
in = new FileInputStream(file);
AlertDialog.Builder builder = new
AlertDialog.Builder(null);
builder.setMessage("you are in middle of encrypt
function");
AlertDialog alert = builder.create();
FileOutputStream fout = new
FileOutputStream("/mnt/sdcard/b.txt");
out = new CipherOutputStream(fout,encCipher);
int num = 0;
while((num = in.read(buffer)) >=0)
{
out.write(buffer, 0, num);
}
out.close();
}
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