using System;
using EaseFilter.FilterControl;

namespace AutoFileEncryption
{
class Program
{
static FilterControl filterControl = new FilterControl();

static void Main(string[] args)
{
string lastError = string.Empty;
string licenseKey = "Email us to request a trial key: info@easefilter.com";

FilterAPI.FilterType filterType = FilterAPI.FilterType.CONTROL_FILTER
| FilterAPI.FilterType.ENCRYPTION_FILTER | FilterAPI.FilterType.PROCESS_FILTER;
int serviceThreads = 5;
int connectionTimeOut = 10; //seconds

try
{
//copy the right Dlls to the current folder.
Utils.CopyOSPlatformDependentFiles(ref lastError);

if (!filterControl.StartFilter(filterType, serviceThreads, connectionTimeOut, licenseKey, ref lastError))
{
Console.WriteLine("Start Filter Service failed with error:" + lastError);
return;
}

//setup a file filter rule for folder encryptFolder
string encryptFolder = "c:\\encryptFolder\\*";
FileFilter fileFilter = new FileFilter(encryptFolder);

//enable the encryption for the filter rule.
fileFilter.EnableEncryption = true;

//get the 256bits encryption key with the passphrase
string passPhrase = "mypassword";
fileFilter.EncryptionKey = Utils.GetKeyByPassPhrase(passPhrase, 32);

//disable the decyrption right, read the raw encrypted data for all except the authorized processes or users.
fileFilter.EnableReadEncryptedData = false;

//setup the authorized processes to decrypt the encrypted files.
string authorizedProcessesForEncryptFolder = "notepad.exe;wordpad.exe";

string[] processNames = authorizedProcessesForEncryptFolder.Split(new char[] { ';' });
if (processNames.Length > 0)
{
foreach (string processName in processNames)
{
if (processName.Trim().Length > 0)
{
//authorized the process with the read encrypted data right.
fileFilter.ProcessNameAccessRightList.Add(processName, FilterAPI.ALLOW_MAX_RIGHT_ACCESS);
}
}
}

//setup the authorized users to decrypt the encrypted files.
string authorizedUsersForEncryptFolder = "domainName\\user1";

if (!string.IsNullOrEmpty(authorizedUsersForEncryptFolder) && !authorizedUsersForEncryptFolder.Equals("*"))
{
string[] userNames = authorizedUsersForEncryptFolder.Split(new char[] { ';' });
if (userNames.Length > 0)
{
foreach (string userName in userNames)
{
if (userName.Trim().Length > 0)
{
//authorized the user with the read encrypted data right.
fileFilter.userAccessRightList.Add(userName, FilterAPI.ALLOW_MAX_RIGHT_ACCESS);
}
}
}

if (fileFilter.userAccessRightList.Count > 0)
{
//set black list for all other users except the white list users.
uint accessFlag = FilterAPI.ALLOW_MAX_RIGHT_ACCESS & ~(uint)FilterAPI.AccessFlag.ALLOW_READ_ENCRYPTED_FILES;
//disable the decryption right, read the raw encrypted data for all except the authorized users.
fileFilter.userAccessRightList.Add("*", accessFlag);
}
}

//add the encryption file filter rule to the filter control
filterControl.AddFilter(fileFilter);

//setup a file filter rule for folder decryptFolder
string decryptFolder = "c:\\decryptFolder\\*";
FileFilter decryptFileFilter = new FileFilter(decryptFolder);

//enable the encryption for the filter rule.
decryptFileFilter.EnableEncryption = true;

//get the 256bits encryption key with the passphrase
decryptFileFilter.EncryptionKey = Utils.GetKeyByPassPhrase(passPhrase, 32);

//don't encrypt the new created file in the folder.
decryptFileFilter.EnableEncryptNewFile = false;

//disable the decyrption right, read the raw encrypted data for all except the authorized processes or users.
decryptFileFilter.EnableReadEncryptedData = false;

//setup authorized processes to decrypt the encrypted files.
string authorizedProcessesForDecryptFolder = "notepad.exe;wordpad.exe";

processNames = authorizedProcessesForDecryptFolder.Split(new char[] { ';' });
if (processNames.Length > 0)
{
foreach (string processName in processNames)
{
if (processName.Trim().Length > 0)
{
//authorized the process with the read encrypted data right.
decryptFileFilter.ProcessNameAccessRightList.Add(processName, FilterAPI.ALLOW_MAX_RIGHT_ACCESS);
}
}
}

filterControl.AddFilter(decryptFileFilter);

if (!filterControl.SendConfigSettingsToFilter(ref lastError))
{
Console.WriteLine("SendConfigSettingsToFilter failed." + lastError);
return;
}

Console.WriteLine("Start filter service succeeded.");

// Wait for the user to quit the program.
Console.WriteLine("Press 'q' to quit the sample.");
while (Console.Read() != 'q') ;

filterControl.StopFilter();

}
catch (Exception ex)
{
Console.WriteLine("Start filter service failed with error:" + ex.Message);
}

}

}
}