Hi!

Im currently struggeling with encryption of streams using
CipherInputStream and CipherOutputStream. For some reason, the last 8
bytes when reading encrypted data seem to be missing (see example
below). Anyone have any idea why this occurs??

public void testCipherStreams() throws Exception {
 int count = 80;
 byte[] key = new byte[]{1, 2, 3, 4, 5, 6, 7, 8};
 Key serverEncKey =
SecretKeyFactory.getInstance("DES").generateSecret(new
DESKeySpec(key));

 // Create Ciphers
 Cipher encCipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
 encCipher.init(Cipher.ENCRYPT_MODE, serverEncKey);
 Cipher decCipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
 decCipher.init(Cipher.DECRYPT_MODE, serverEncKey);

 // Create encryption-stream
 ByteArrayOutputStream output = new ByteArrayOutputStream();
 OutputStream encryptedOutput = new CipherOutputStream(output,
encCipher);

 // Create a random buffer
 Random rand = new Random();
 byte[] buf = new byte[count];
 rand.nextBytes(buf);

 // Run it through the stream
 encryptedOutput.write(buf);
 encryptedOutput.flush();
 output.flush();
 byte[] encrypted = output.toByteArray();

 // Create decryption-stream
 ByteArrayInputStream input = new ByteArrayInputStream(encrypted);
 InputStream decryptedInput  = new CipherInputStream(input,
decCipher);

 // Get decrypted output
 byte[] decrypted = new byte[count];
 decryptedInput.read(decrypted);
 // Compare!
 for (int i=0; i < count; i++) {
   assertEquals("byte " + i + " did not match", buf[i], decrypted[i]);
 }
}

Thx =)