application Flash Hook

Question

si je charge dans mon application C # une application Flash A qui ouvre une prise avec un serveur B, est-il possible d'installer un crochet local afin que je puisse lire les paquets échangés entre A et le serveur B?

• Je peux obtenir les sources d'application flash si nécessaire, mais je ne suis pas celui qui les a écrites
• Je suis nouveau à C # (pour être honnête, je me demande toujours quelle est la meilleure langue pour écrire ce genre d'application pour les fenêtres) et de crochetage, de sorte que tout exemple serait vraiment apprécié:)
• Je travaille côté client

Answer 1

Oui, vous pouvez. Vous devez utiliser EasyHook bibliothèque pour raccorder des appels API socket natif de C #. Et en plaçant des crochets sur connecter , envoyer et recv fonctions que vous pouvez brancher tout le trafic en application de Windows.

Voici un exemple:

private IntPtr _socketsLib;
private LocalHook _createConnectHook;
private LocalHook _createRecvHook;
private LocalHook _createSendHook;

_socketsLib = NativeAPI.LoadLibrary("Ws2_32.dll");
_createConnectHook = LocalHook.Create(LocalHook.GetProcAddress("Ws2_32.dll", "connect"), new NativeSocketMethod.DConnect(connect_Hooked), this);
_createRecvHook = LocalHook.Create(LocalHook.GetProcAddress("Ws2_32.dll", "recv"),
                                           new NativeSocketMethod.Drecv(recv_Hooked), this);

_createSendHook = LocalHook.Create(LocalHook.GetProcAddress("Ws2_32.dll", "send"),
                              new NativeSocketMethod.Dsend(send_Hooked), this);
_createConnectHook.ThreadACL.SetExclusiveACL(new int[1]);
_createRecvHook.ThreadACL.SetExclusiveACL(new int[1]);
_createSendHook.ThreadACL.SetExclusiveACL(new int[1]);

private static int connect_Hooked(IntPtr socketHandle, ref NativeSocketMethod.sockaddr name, ref int namelen)
    {
        // TODO: do something with data here
        return NativeSocketMethod.connect(socketHandle, ref name, ref namelen);
    }

private static int recv_Hooked(IntPtr socketHandle, IntPtr buf, int count, int socketFlags)
    {
        // TODO: do something with data here
        return NativeSocketMethod.recv(socketHandle, buf, count, socketFlags);
    }

private static int send_Hooked(IntPtr socketHandle, IntPtr buf, int count, int socketFlags)
    {
        // TODO: do something with data here
        return NativeSocketMethod.send(socketHandle, buf, count, socketFlags);
    }

NativeSocketMethod.cs

public static class NativeSocketMethod
{
    [DllImport("Ws2_32.dll")]
    public static extern int connect(IntPtr socketHandle, ref sockaddr Address, ref int Addresslen);
    [DllImport("Ws2_32.dll")]
    public static extern int getpeername(IntPtr s, ref sockaddr Address, ref int namelen);
    [DllImport("ws2_32.dll")]
    public static extern IntPtr inet_ntoa(in_addr a);
    [DllImport("ws2_32.dll")]
    public static extern ushort ntohs(ushort netshort);
    [DllImport("Ws2_32.dll")]
    public static extern int recv(IntPtr socketHandle, IntPtr buf, int Buffercount, int socketFlags);
    [DllImport("Ws2_32.dll")]
    public static extern int send(IntPtr socketHandle, IntPtr buf, int count, int socketFlags);

    public enum AddressFamily
    {
        AppleTalk = 0x11,
        BlueTooth = 0x20,
        InterNetworkv4 = 2,
        InterNetworkv6 = 0x17,
        Ipx = 4,
        Irda = 0x1a,
        NetBios = 0x11,
        Unknown = 0
    }

    [UnmanagedFunctionPointer(CallingConvention.StdCall, CharSet=CharSet.Unicode, SetLastError=true)]
    public delegate int DConnect(IntPtr socketHandle, ref NativeSocketMethod.sockaddr Address, ref int Addresslen);

    [UnmanagedFunctionPointer(CallingConvention.StdCall, CharSet=CharSet.Unicode, SetLastError=true)]
    public delegate int Drecv(IntPtr socketHandle, IntPtr buf, int Buffercount, int socketFlags);

    [UnmanagedFunctionPointer(CallingConvention.StdCall, CharSet=CharSet.Unicode, SetLastError=true)]
    public delegate int Dsend(IntPtr socketHandle, IntPtr buf, int count, int socketFlags);

    [StructLayout(LayoutKind.Sequential)]
    public struct in_addr
    {
        [MarshalAs(UnmanagedType.ByValArray, SizeConst=4)]
        public byte[] sin_addr;
    }

    public enum ProtocolType
    {
        BlueTooth = 3,
        ReliableMulticast = 0x71,
        Tcp = 6,
        Udp = 0x11
    }

    [StructLayout(LayoutKind.Sequential)]
    public struct sockaddr
    {
        public short sin_family;
        public ushort sin_port;
        public NativeSocketMethod.in_addr sin_addr;
        [MarshalAs(UnmanagedType.ByValArray, SizeConst=8)]
        public byte[] sin_zero;
    }

    public enum SocketType
    {
        Unknown,
        Stream,
        DGram,
        Raw,
        Rdm,
        SeqPacket
    }
}