Method sm4_setkey_dec

src/com/autoDecoder/util/SM4.java:226–241

(SM4_Context ctx, byte[] key)

    }

    public void sm4_setkey_dec(SM4_Context ctx, byte[] key) throws Exception {
        if (ctx == null) {
            throw new Exception("ctx is null!");
        }

        if (key == null || key.length != 16) {
            throw new Exception("key error!");
        }

        int i = 0;
        ctx.mode = SM4_DECRYPT;
        sm4_setkey(ctx.sk, key);
        for (i = 0; i < 16; i++) {
            SWAP(ctx.sk, i);
        }
    }

    public byte[] sm4_crypt_ecb(SM4_Context ctx, byte[] input) throws Exception {
        if (input == null) {