code: function mdxDecrypt(comp_block) {
    const key = ripemd128.ripemd128(new BufferList(comp_block.slice(4, 8))
      .append(Buffer.from([0x95, 0x36, 0x00, 0x00])).slice(0, 8));
    return new BufferList(comp_block.slice(0, 8))
      .append(fast_decrypt(comp_block.slice(8), key));
  }
docs: mdx decrypt method
  @param {Buffer} comp_block data buffer needs to decrypt