Method SHL

src/com/autoDecoder/util/SM4.java:28–30

(long x, int n)

    }

    private long SHL(long x, int n) {
        return (x & 0xFFFFFFFF) << n;
    }

    private long ROTL(long x, int n) {
        return SHL(x, n) | x >> (32 - n);