Leading garbage characters when using CipherInputStream

Question

So, after receiving an encrypted message, I can decrypt it perfectly except that I get a random amount of leading garbabe characters. Using the same plaintext, here are examples of the beginning of the output file for two runs (using od -c to look at the files):
0000000 315 7 004 371 242 \0 w ` t h e L L S E
and
0000000 1 " 246 317 0 j 321 V t h e L L S E
The part beginning with "The LLSE..." is correct.
The fact that the leading garbage appears to be random leads me to believe that there is something wrong with the crypto rather with the file I/O.
Here's the relevant code chunk:
Cipher sharedCypher = Cipher.getInstance("DES/CFB8/PKCS5Padding");
SecretKeySpec DESKeySpec = new SecretKeySpec(clientDESKey.getEncoded(), "DES");
IvParameterSpec iv = new IvParameterSpec(clientDESKey.getEncoded());
sharedCypher.init(Cipher.DECRYPT_MODE, DESKeySpec, iv);
CipherInputStream cis = new CipherInputStream(new FileInputStream(WD), sharedCypher);     
String time = ""+System.currentTimeMillis();
File outputFileW = new File("/tmp/new_wireless_data."+time);
System.out.println(System.currentTimeMillis()+": Output file is" + outputFileW.getAbsolutePath());
outputFileW.createNewFile();
FileOutputStream fos = new FileOutputStream(outputFileW);
byte[] putCypherBytes = new byte[8];
int i=0;
while((i=cis.read(putCypherBytes)) !=  -1) {
   fos.write(putCypherBytes, 0, i);
}Any thoughts on cleaning this up would be greatly appreciated.
Best,
Glenn

Answer 1

Well, I seriously doubt its the JDK or JCE. I dont have time right now to
download that exact version and test it, but instead I'll give you the code
I pieced together from your posts. Put your text to be encrypted in a file
called plaintext.txt in the directory you run the class in. The decrypted
text should be appear in new_wireless_data...
If you can run this without error, then your problem most likely lies
on your server-side.
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.crypto.SecretKey;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import sun.misc.BASE64Decoder;
public class CryptoTest {
    public static String encryptedFile = "encrypted.txt";
    public static String plainTextFile = "plaintext.txt";
    public static SecretKey clientDESKey;
    public static String keyString = "emePXfjmLNw=";
    public static void main(String [] args) {
        try {
            BASE64Decoder base64Decoder = new BASE64Decoder();
            byte[] keyBytes = base64Decoder.decodeBuffer(keyString);
            clientDESKey = new SecretKeySpec(keyBytes, "DES");
            _main(args);
        } catch (Exception e) {
            System.out.println("ERROR! : " + e.getMessage());
            e.printStackTrace();
    public static void _main(String [] args) throws Exception {
        Cipher serverCypher = Cipher.getInstance("DES/CFB8/PKCS5Padding");
        serverCypher.init(Cipher.ENCRYPT_MODE, clientDESKey,
            new IvParameterSpec(clientDESKey.getEncoded()));
        File inputFileW = new File(plainTextFile);        
        CipherInputStream cis1 =
            new CipherInputStream(
                new FileInputStream(inputFileW),serverCypher);               
        File outputFileW1 = new File(encryptedFile);
        FileOutputStream fos1 = new FileOutputStream(outputFileW1);
        byte[] putCypherBytes1 = new byte[8];
        int i1=0;
        while((i1=cis1.read(putCypherBytes1)) !=  -1) {
           fos1.write(putCypherBytes1, 0, i1);
        inputFileW.delete();
        //=========================================================
        Cipher sharedCypher = Cipher.getInstance("DES/CFB8/PKCS5Padding");
        SecretKeySpec DESKeySpec = new SecretKeySpec(clientDESKey.getEncoded(), "DES");
        IvParameterSpec iv = new IvParameterSpec(clientDESKey.getEncoded());
        sharedCypher.init(Cipher.DECRYPT_MODE, DESKeySpec, iv);
        CipherInputStream cis = new CipherInputStream(new FileInputStream(encryptedFile), sharedCypher);     
        String time = ""+System.currentTimeMillis();
        File outputFileW = new File("new_wireless_data."+time);
        System.out.println(System.currentTimeMillis()+": Output file is" + outputFileW.getAbsolutePath());
        outputFileW.createNewFile();
        FileOutputStream fos = new FileOutputStream(outputFileW);
        byte[] putCypherBytes = new byte[8];
        int i=0;
        while((i=cis.read(putCypherBytes)) !=  -1) {
           fos.write(putCypherBytes, 0, i);
}