相关疑难解决方法(0)

我有一个用于加密的Java代码,如下所示!

private static byte[] encrypt(byte[] raw, byte[] clear) throws 
   Exception {  
    SecretKeySpec skeySpec = new SecretKeySpec(raw,  "AES");  
    Cipher cipher = null;

    if(isIVUsedForCrypto) {
        cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec, new IvParameterSpec(IV));  
    }
    else 
    {
        cipher = Cipher.getInstance("AES");
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec);  
    }
    byte[] encrypted = cipher.doFinal(clear);  
    return encrypted;  
}  

 public static byte[] toByte(String hexString) { 

    int len = hexString.length()/2;  
    byte[] result = new byte[len];  
    try{
    for (int i = 0; i < len; i++) { 
        result[i] = Integer.valueOf(hexString.substring(2*i, 2*i+2),16).byteValue();  
    }
    }catch (Exception e) …