Problem in ZIP file encryption

Question

Hi Folks,
I am facing a problem while encrypting and decrypting a ZIP file. The result file is corrupted.
If i encrypt .txt and .doc files, i am able to get them in decryption. But problem with ZIP files. What could be the reasone?
I am using AES algorithem.
Key Generator code is:
================
KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(128); //128 bitskey = kgen.generateKey();
Encryption:
========
Cipher ecipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
//paramSpec is a Initialization Vector
ecipher.init(Cipher.ENCRYPT_MODE, skey, paramSpec);
FileInputStream in = new FileInputStream("c:\\encryption\\Source.zip");
FileOutputStream out = new FileOutputStream("c:\\cipher\\cipher.enc");
OutputStream cout = new CipherOutputStream(out, ecipher);
int numRead = 0;
while ((numRead = in.read(buf)) >= 0) {     
cout.write(buf, 0, numRead);
Decryption:
========
Cipher dcipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
dcipher.init(Cipher.DECRYPT_MODE, skey, paramSpec);
FileInputStream fis = new FileInputStream("c:\\cipher\\cipher.enc");
InputStream in = new CipherInputStream(fis, dcipher);
FileOutputStream fos = new FileOutputStream("c:\\encryption\\Result.zip");
int numRead = 0;
while ((numRead = in.read(buf)) >= 0) {    
fos.write(buf, 0, numRead);
}

Answer 1

bala_1404 wrote:
i closed them in the program. i just pasted important lines of my program.You have a program that does not work and you don't know why yet you feel confident enough in your diagnosis to show just the lines where you think the problem lies. I'm betting that you are closing the wrong streams but of course I am guessing since I can't see the code that matters.
Good luck.