CipherInputStream/CipherOutputStream

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 =)

.

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