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public static byte[] decrypt(byte[] inData,byte[] keyData){
if(inData==null) throw new IllegalArgumentException();
try{
System.out.print("-----------1="+keyData.length);
SecretKey key=new SecretKeySpec(keyData,"RC4");
System.out.print("-----------2");
Cipher cipher=Cipher.getInstance("RC4");
System.out.print("-----------3");
cipher.init(Cipher.DECRYPT_MODE, key);
System.out.print("-----------4");
return cipher.doFinal(inData);
}catch(Exception e){
System.out.println(e.getMessage());
return null;
}
}