Method padding

src/com/autoDecoder/util/SM4.java:168–211

(byte[] input, int mode)

    }
    //修改了填充模式,为模式
    private byte[] padding(byte[] input, int mode) {
        if (input == null) {
            return null;
        }

        byte[] ret = (byte[]) null;
        if (mode == SM4_ENCRYPT) {
            //填充:hex必须是32的整数倍填充 ,填充的是80  00 00 00
            int p = 16 - input.length % 16;
            String inputHex = Util.byteToHex(input)+ "80";
//            System.out.println(inputHex);
            StringBuffer stringBuffer =new StringBuffer(inputHex);
//            for (int i = 0; i <p-1 ; i++) {
//                stringBuffer.append("00");
//            }
            ret= Util.hexToByte(stringBuffer.toString());
            //ret = new byte[input.length + p];
            /*System.arraycopy(input, 0, ret, 0, input.length);
            for (int i = 0; i < p; i++) {
                ret[input.length + i] = (byte) '�';
            }*/
        } else {
            /*int p = input[input.length - 1];
            ret = new byte[input.length - p];
            System.arraycopy(input, 0, ret, 0, input.length - p);*/

            String inputHex =Util.byteToHex(input);
            System.out.println("SM4  " + inputHex);
            int i = inputHex.lastIndexOf("80");
            if (i == -1)
                i = inputHex.lastIndexOf("0b"); // 新增
            if (i == -1)
                i = inputHex.lastIndexOf("0a"); // 新增
            if (i == -1)
                i = inputHex.lastIndexOf("0c"); // 新增
            if ( i == -1)
                i = inputHex.length();

            String substring = inputHex.substring(0, i);
            ret= Util.hexToByte(substring);
            System.out.println("208  "+Arrays.toString(ret));
        }
        return ret;
    }

    public void sm4_setkey_enc(SM4_Context ctx, byte[] key) throws Exception {
        if (ctx == null) {