如何从网络共享访问受密码保护的文件？ [复制]

Posted 2023-04-14

【中文标题】如何从网络共享访问受密码保护的文件？ [复制]

【英文标题】：How to access a password protected file from the network share? [duplicate]

【发布时间】：2019-09-17 21:03:49

【问题描述】：

我遇到了一个问题，我必须从网络共享位置获取受密码保护的文件夹的内容（文件和子目录）。 给定，我有访问文件夹的密码和到达该位置的文件路径。我该如何实现？

假设，这是共享网络—— \Server\Sharedfiles\PasswordProtectedFolder 我想获取其中的内容列表。

【问题讨论】：

这是你想要的吗？ ***.com/questions/295538/…

@NevilleKuyt 就是这样！

【参考方案1】：

您可以使用以下代码从 UNC 路径访问文件。

    public static class NetworkShare
    
        /// <summary>
        /// Connects to the remote share
        /// </summary>
        /// <returns>Null if successful, otherwise error message.</returns>
        public static string ConnectToShare(string uri, string username, string password)
        
            //Create netresource and point it at the share
            var nr = new Netresource
            
                dwType = ResourcetypeDisk,
                lpRemoteName = uri
            ;

            //Create the share
            var ret = WNetUseConnection(IntPtr.Zero, nr, password, username, 0, null, null, null);

            //Check for errors
            return ret == NoError ? null : GetError(ret);
        

        /// <summary>
        /// Remove the share from cache.
        /// </summary>
        /// <returns>Null if successful, otherwise error message.</returns>
        public static string DisconnectFromShare(string uri, bool force)
        
            //remove the share
            var ret = WNetCancelConnection(uri, force);

            //Check for errors
            return ret == NoError ? null : GetError(ret);
        

        #region P/Invoke Stuff
        [DllImport("Mpr.dll")]
        private static extern int WNetUseConnection(
            IntPtr hwndOwner,
            Netresource lpNetResource,
            string lpPassword,
            string lpUserId,
            int dwFlags,
            string lpAccessName,
            string lpBufferSize,
            string lpResult
            );

        [DllImport("Mpr.dll")]
        private static extern int WNetCancelConnection(
            string lpName,
            bool fForce
            );

        [StructLayout(LayoutKind.Sequential)]
        private class Netresource
        
            public int dwScope = 0;
            public int dwType = 0;
            public int dwDisplayType = 0;
            public int dwUsage = 0;
            public string lpLocalName = "";
            public string lpRemoteName = "";
            public string lpComment = "";
            public string lpProvider = "";
        

        #region Consts
        const int ResourcetypeDisk = 0x00000001;
        const int ConnectUpdateProfile = 0x00000001;
        #endregion

        #region Errors
        const int NoError = 0;

        const int ErrorAccessDenied = 5;
        const int ErrorAlreadyAssigned = 85;
        const int ErrorBadDevice = 1200;
        const int ErrorBadNetName = 67;
        const int ErrorBadProvider = 1204;
        const int ErrorCancelled = 1223;
        const int ErrorExtendedError = 1208;
        const int ErrorInvalidAddress = 487;
        const int ErrorInvalidParameter = 87;
        const int ErrorInvalidPassword = 1216;
        const int ErrorMoreData = 234;
        const int ErrorNoMoreItems = 259;
        const int ErrorNoNetOrBadPath = 1203;
        const int ErrorNoNetwork = 1222;
        const int ErrorSessionCredentialConflict = 1219;

        const int ErrorBadProfile = 1206;
        const int ErrorCannotOpenProfile = 1205;
        const int ErrorDeviceInUse = 2404;
        const int ErrorNotConnected = 2250;
        const int ErrorOpenFiles = 2401;

        private struct ErrorClass
        
            public int Num;
            public string Message;
            public ErrorClass(int num, string message)
            
                this.Num = num;
                this.Message = message;
            
        

        private static readonly ErrorClass[] ErrorList = new ErrorClass[] 
        new ErrorClass(ErrorAccessDenied, "Error: Access Denied"),
        new ErrorClass(ErrorAlreadyAssigned, "Error: Already Assigned"),
        new ErrorClass(ErrorBadDevice, "Error: Bad Device"),
        new ErrorClass(ErrorBadNetName, "Error: Bad Net Name"),
        new ErrorClass(ErrorBadProvider, "Error: Bad Provider"),
        new ErrorClass(ErrorCancelled, "Error: Cancelled"),
        new ErrorClass(ErrorExtendedError, "Error: Extended Error"),
        new ErrorClass(ErrorInvalidAddress, "Error: Invalid Address"),
        new ErrorClass(ErrorInvalidParameter, "Error: Invalid Parameter"),
        new ErrorClass(ErrorInvalidPassword, "Error: Invalid Password"),
        new ErrorClass(ErrorMoreData, "Error: More Data"),
        new ErrorClass(ErrorNoMoreItems, "Error: No More Items"),
        new ErrorClass(ErrorNoNetOrBadPath, "Error: No Net Or Bad Path"),
        new ErrorClass(ErrorNoNetwork, "Error: No Network"),
        new ErrorClass(ErrorBadProfile, "Error: Bad Profile"),
        new ErrorClass(ErrorCannotOpenProfile, "Error: Cannot Open Profile"),
        new ErrorClass(ErrorDeviceInUse, "Error: Device In Use"),
        new ErrorClass(ErrorExtendedError, "Error: Extended Error"),
        new ErrorClass(ErrorNotConnected, "Error: Not Connected"),
        new ErrorClass(ErrorOpenFiles, "Error: Open Files"),
        new ErrorClass(ErrorSessionCredentialConflict, "Error: Credential Conflict"),
    ;

        private static string GetError(int errNum)
        
            foreach (var er in ErrorList)
            
                if (er.Num == errNum) return er.Message;
            
            return "Error: Unknown, " + errNum;
        
        #endregion

        #endregion

        public static byte[] GetFileBytes(string serverSharedPath,string fileName, string userName, string password)
        
            DisconnectFromShare($@"serverSharedPath", true); //Disconnect in case we are currently connected with our credentials;
            var connectToShare = ConnectToShare($@"serverSharedPath", userName, password); //Connect with the new credentials
            if (!string.IsNullOrEmpty(connectToShare))
                return new byte[0];
            if (!Directory.Exists($@"serverSharedPath"))
                return new byte[0];
            if (!File.Exists($@"serverSharedPath\fileName"))
                return new byte[0];
            return File.ReadAllBytes(
                $@"serverSharedPath\fileName");
        

        public static bool DeleteFileFromSharedPath(string serverSharedPath, string fileName, string userName,
            string password)
        
            DisconnectFromShare($@"serverSharedPath", true); //Disconnect in case we are currently connected with our credentials;
            var connectToShare = ConnectToShare($@"serverSharedPath", userName, password); //Connect with the new credentials
            if (!string.IsNullOrEmpty(connectToShare))
                return false;
            if (File.Exists($@"serverSharedPath\fileName"))
            
                try
                
                    File.Delete($@"serverSharedPath\fileName");
                    return true;
                
                catch (IOException exception)
                
                    return false;
                
            
            return true;
        

        public static bool WriteFileByte(string serverSharedPath, string fileName, byte[] fileBytes, string userName, string password)
        
            DisconnectFromShare($@"serverSharedPath",
                true); //Disconnect in case we are currently connected with our credentials;
            var connectToShare =
                ConnectToShare($@"serverSharedPath", userName, password); //Connect with the new credentials
            if (!string.IsNullOrEmpty(connectToShare))
                return false;
            if (!Directory.Exists($@"serverSharedPath"))
                return false;
            if (File.Exists($@"serverSharedPath\fileName"))
                File.Delete($@"serverSharedPath\fileName");

            File.WriteAllBytes($@"serverSharedPath\fileName", fileBytes);
            return true;
        


        public static bool IsNetworkConnectivityOk(string serverSharedPath, string userName, string password)
        
            DisconnectFromShare($@"serverSharedPath", true); //Disconnect in case we are currently connected with our credentials;
            var connectToShare = ConnectToShare($@"serverSharedPath", userName, password); //Connect with the new credentials
            if (!string.IsNullOrEmpty(connectToShare))
                return false;
            if (!Directory.Exists($@"serverSharedPath"))
                return false;
            DisconnectFromShare($@"serverSharedPath", false); //Disconnect from the server.
            return true;