}
    public RC4(byte[] key)
    {
        init(key, 0, key.length);
    }

    public void init(byte[] key, int ki, int klen)
    {
        s = new byte[256];

        for (i = 0; i < 256; i++)
            s[i] = (byte)i;

        for (i = j = 0; i < 256; i++) {
            j = (j + key[ki + i % klen] + s[i]) & 0xff;
            byte t = s[i];
            s[i] = s[j];
            s[j] = t;
        }

         * a mismatch. This strips trailing slashes from all keys to eliminate
         * this problem.
         */
        int ki = key.length();
        while (ki > 1 && key.charAt(ki - 1) == '\\') {
            ki--;
        }
        if (ki < key.length()) {
            key = key.substring(0, ki);
        }

        /* Subtract the server and share from the pathConsumed so that

        // per bouncycastle
        // <li>1: K(i) := PRF( KI, [i]_2 || Label || 0x00 || Context || [L]_2 ) with the counter at the very beginning
        // of the fixedInputData (The default implementation has this format)</li>
        // with the parameters
        // <li>1. KDFCounterParameters(ki, null, "Label || 0x00 || Context || [L]_2]", 8);

        // all fixed inputs go into the suffix: