public class Test {

    public static void encode(byte[] in, byte[] out, int password) {
    int len = in.length;

    int seed = password ^ 0xe84f172f;
    for (int i = 0; i < len; ++i) {
        byte a = (byte) ((in[i] ^ seed) >>> 5);
        byte b = (byte) (((((int) in[i]) << 13) ^ seed) >>> (13 - 3));
        a &= 0x7;
        b &= 0xf8;
        out[i] = (byte) (a | b);
        seed = (seed * 5393887 + in[i]);
    }
    }

    public static void decode(byte[] in, byte[] out, int password) {
    int len = in.length;

    int seed = password ^ 0xe84f172f;
    for (int i = 0; i < len; ++i) {
        // fill the code here

        byte a = (byte) ((in[i] & 0x07) << 5); // 把密文的第三位变成高三位
        //第0位到第2位置0，右移3位，b中第0位到第4位是有效位
        byte b = (byte) ((in[i] & 0xf8) >>> 3); // 把密文的高五位变成低五位
        a = (byte) (a ^ seed); // 还原
        a &= 0xe0; //无效位再次置0，因为有可能，经过异或之后变成1了
        b = (byte) (((((int) b) << 13) ^ seed) >>> 13); // 还原
        b &= 0x1f; ////无效位再次置0，因为有可能，经过异或之后变成1了 

        out[i] = (byte) (a | b); //将临时变量中的数据串接，保存到out[i],这是真实的数据来了，
        seed = (seed * 5393887 + out[i]);
    }
    }

    public static void main(String[] args) throws Exception {
    int password = 0xea5c3443;
    byte[] buf1 = { -107, 88, 37, 78, -35, 5, 60, 6, -86, 36, -105, 43, 99,
        -83, -1, -82, -103, -3, 36, -124, -100, 62, -7, -42, -71, 119,
        82, 41, -89, 95, 59, -31, -84, 43, 85, 44, };
    byte[] buf2 = new byte[buf1.length];
    decode(buf1, buf2, password);
    System.out.println(new String(buf2, "GBK"));
    }

}
/*
 搜狗输入法皮肤拥有数万款炫酷皮肤！！
 */