I was following a small tutorial of Microsoft.
Which basically saves your text input onto the internal memory of your device.
String _filename = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "Notes.txt");
Results in: /data/user/0/com.companyname.notes/files/.local/share/Notes.txt for me.
Now, while everything works, I would like to see this Notes.txt file in the folder.
I have searched far and wide, but can't seem to find a way to locate this file on my device.
I can go to Android/data/com.companyname.notes/files but then I only see a ._override_ folder with the app project files in it, but without the Notes.txt
Any ideas?
Thanks
From your path:/data/user/0/com.companyname.notes/files/.local/share/Notes.txt, we can know that you want to access internal storage, but Internal storage refers to the non-volatile memory that Android allocates to the operating system, APKs, and for individual apps. This space is not accessible except by the operating system or apps. So you can not find this text file from internal storage.
If you want to see file, you can save this file in external storage
/storage/emulated/0/Android/data/com.companyname.app/files
More detailed info about internal storage, see:
https://learn.microsoft.com/en-us/xamarin/android/platform/files/
Update
If you want to save text file, you should declare one of the two permissions for external storage in the AndroidManifest.xml
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
Then the primary location for private external files is found by calling the method Android.Content.Context.GetExternalFilesDir(string type). This method will return a Java.IO.File object that represents the private external storage directory for the app. Passing null to this method will return the path to the user's storage directory for the application. As an example, for an application with the package name com.companyname.app, the "root" directory of the private external files would be:
/storage/emulated/0/Android/data/com.companyname.app/files/
In the Forms, you need to create new interface:
public interface IFileSystem
{
string GetExternalStorage();
}
Implement this interface in Android:
[assembly: Dependency(typeof(FileSystemImplementation))]
namespace FileApp.Droid
{
public class FileSystemImplementation : IFileSystem
{
public string GetExternalStorage()
{
Context context = Android.App.Application.Context;
var filePath = context.GetExternalFilesDir("");
return filePath.Path;
}
}
}
Now you can create text file and save text in this file:
private async void Btn1_Clicked(object sender, EventArgs e)
{
var folderPath = DependencyService.Get<IFileSystem>().GetExternalStorage();
var file = Path.Combine(folderPath, "count.txt");
using (var writer = File.CreateText(file))
{
await writer.WriteLineAsync("123456789000000000000000000000000000000000000");
}
}
I have made a sample:
https://github.com/CherryBu/FileApp
The exact path to the private external storage directory can vary from device to device and between versions of Android.
Open your File Manager App
Go to Android/data
Find the .com folder, in your case, com.companyname.notes
Follow the path until you find the file
While creating the connection from NetSuite to SFTP using N/SFTP module i'm facing an error states:
"FTP_INCORRECT_HOST_KEY","message":"Provided host key does not match
remote server's fingerprint."
I have tried checking with my server team but no hope. Can any one suggest me how to resolve this or how can i get an authorized finger print host key from server.
I have tried with Suitescript 2.0 module (N/SFTP) with the help of the tool mentioned below.
https://ursuscode.com/netsuite-tips/suitescript-2-0-sftp-tool/
/**
*#NApiVersion 2.x
#NScriptType ScheduledScript
*/
define(['N/sftp', 'N/file', 'N/runtime'],function(sftp, file,runtime) {
function execute(context)
{
var myPwdGuid = "Encrypted password by GUID";
var myHostKey = "Some long Host key around 380 characters";
// establish connection to remote FTP server
var connection = sftp.createConnection({
username: 'fuel_integration',
passwordGuid: myPwdGuid, // references var myPwdGuid
url: '59.165.215.45',//Example IP
directory: '/sftproot/TaleoSync',
restrictToScriptIds : runtime.getCurrentScript().id,
restrictToCurrentUser :false,
hostKey: myHostKey // references var myHostKey
});
// specify the file to upload using the N/file module
// download the file from the remote server
var downloadedFile = connection.download({
directory: '/sftproot/TaleoSync',
filename: 'Fuel Funnel Report_without filter.csv'
});
downloadedFile.folder = ;
downloadedFile.save();
context.response.write(' Downloaded "Fuel Funnel Report_without filter" to fileCabinet');
}
return {
execute: execute
};
});
I expect to create a connection between SFTP and NetSuite to down a file from SFTP and place it to NetSuite file cabinet.
A couple of things:
restrictToScriptIds : runtime.getCurrentScript().id,
restrictToCurrentUser :false,
Are not part of the createConnection signature. Those should have been used when you created a Suitelet to vault your credential.
However the hostkey complaint may be dealt with by using ssh-keyscan from a linux box.
ssh-keyscan 59.165.215.45
should replay with the server name then ssh-rsa then a long base64 string. Copy that string so it ends up in myHostKey and set the hostKeyType to RSA.
Now I used syslog-ng recive json-format log and store to local file, but the log was be changed.
pro log:
{"input_name":"sensor_alert","machine":"10.200.249.27"}
currently store log:
"sensor_alert","machine":"10.200.249.27"}`
the key "input_name" was be deleted
syslog-ng config:
source test_src {
udp(
ip(0.0.0.0) port(5115)
);
};
destination test_dest {
file("/data/test_${YEAR}${MONTH}${DAY}.log"
template("$MSG\n")
template-escape(no));
};
log {
source(test_src);
destination(test_dest);
};
Who can tell me the reason, thks.
If you only send the above mentioned string (without any other framing) probably you should turn of parsing in the source with:
udp(... flags(no-parse));
This is going to put everything it received into the MSG macro.
If you have some kind of framing (like syslog) please provide an sample message, because otherwise I can only guess.
I am using Xcode 7.3 for iOS 9.3 to try and encrypt a Core Data file. I am trying to use NSPersistentStoreFileProtectionKey and set it to NSFileProtectionComplete to enable the encryption. It is not working for some reason and I can always see the .sqlite file generated by the app and browse through the content in sqlitebrowser or iexplorer. Here is my code :
lazy var persistentStoreCoordinator: NSPersistentStoreCoordinator = {
// The persistent store coordinator for the application. This implementation creates and returns a coordinator, having added the store for the application to it. This property is optional since there are legitimate error conditions that could cause the creation of the store to fail.
// Create the coordinator and store
let coordinator = NSPersistentStoreCoordinator(managedObjectModel: self.managedObjectModel)
let url = self.applicationDocumentsDirectory.URLByAppendingPathComponent("SingleViewCoreData.sqlite")
var failureReason = "There was an error creating or loading the application's saved data."
let dict: [NSObject : AnyObject] = [
NSPersistentStoreFileProtectionKey : NSFileProtectionComplete
]
do {
try coordinator.addPersistentStoreWithType(NSSQLiteStoreType, configuration: nil, URL: url, options: dict)
} catch {
// Report any error we got.
var dict = [String: AnyObject]()
dict[NSLocalizedDescriptionKey] = "Failed to initialize the application's saved data"
dict[NSLocalizedFailureReasonErrorKey] = failureReason
dict[NSUnderlyingErrorKey] = error as NSError
let wrappedError = NSError(domain: "YOUR_ERROR_DOMAIN", code: 9999, userInfo: dict)
// Replace this with code to handle the error appropriately.
// abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
NSLog("Unresolved error \(wrappedError), \(wrappedError.userInfo)")
abort()
}
do {
let url = self.applicationDocumentsDirectory.URLByAppendingPathComponent("SingleViewCoreData.sqlite")
try NSFileManager.defaultManager().setAttributes([NSFileProtectionKey : NSFileProtectionComplete], ofItemAtPath: url.path!)
} catch {
}
do {
let url = self.applicationDocumentsDirectory.URLByAppendingPathComponent("SingleViewCoreData.sqlite-wal")
try NSFileManager.defaultManager().setAttributes([NSFileProtectionKey : NSFileProtectionComplete], ofItemAtPath: url.path!)
// try print(NSFileManager.defaultManager().attributesOfFileSystemForPath(String(url)))
} catch {
}
do {
let url = self.applicationDocumentsDirectory.URLByAppendingPathComponent("SingleViewCoreData.sqlite-shm")
try NSFileManager.defaultManager().setAttributes([NSFileProtectionKey : NSFileProtectionComplete], ofItemAtPath: url.path!)
// try print(NSFileManager.defaultManager().attributesOfFileSystemForPath(String(url)))
} catch {
}
return coordinator
}()
I have also enabled Data Protection for my target in the "Capabilities". I have regenerated the provisioning profile from the Apple Developer portal and am using that with Enabled Data Protection.
I am also using the following code to check the file attributes of .sqlite , .sqlite-wal and .sqlite-shm files. NSFileProtectionKey is correctly set for all 3 of them.
func checkProtectionForLocalDb(atDir : String){
let fileManager = NSFileManager.defaultManager()
let enumerator: NSDirectoryEnumerator = fileManager.enumeratorAtPath(atDir)!
for path in enumerator {
let attr : NSDictionary = enumerator.fileAttributes!
print(attr)
}
}
I also tried disabling the Journal mode to prevent -wal and -shm files from being created. But I can still read the .sqlite file. Even though the attributes read NSFileProtectionComplete.
As described in the Apple Documentation at Apple Docs under "Protecting Data using On Disk Encryption", I tried to check whether the value of variable protectedDataAvailable changes as shown in the code below
public func applicationDidEnterBackground(application: UIApplication) {
// Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
// If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
NSThread.sleepForTimeInterval(10)
sleep(10)
let dataAvailable : Bool = UIApplication.sharedApplication().protectedDataAvailable
print("Protected Data Available : " + String(dataAvailable))
}
If I check the value without the delay it's set to true but after adding the delay it's set to false. This is kind of encouraging, however, right after, when I download the container, to show the content, it still has .sqlite file that still shows the content when opened in sqlitebrowser.
Ok, I finally understand this.
Using Xcode 7.3.1
Enabling File Protection
Enable File Protection using the Capabilities tab on your app target
If you do not want the default NSFileProtectionComplete, change this setting in the developer portal under your app id
Make sure Xcode has the new provisioning profile this creates.
For protecting files your app creates, that's it.
To protect Core Data, you need to add the NSPersistentStoreFileProtectionKey: NSFileProtectionComplete option to your persistent store.
Example:
var options: [NSObject : AnyObject] = [NSMigratePersistentStoresAutomaticallyOption: true,
NSPersistentStoreFileProtectionKey: NSFileProtectionComplete,
NSInferMappingModelAutomaticallyOption: true]
do {
try coordinator!.addPersistentStoreWithType(NSSQLiteStoreType, configuration: nil, URL: url, options: options)
Testing File Protection
I am not able to test this using a non-jailbroken device connected to a computer. Every attempt to access the device this way requires that I "trust" the computer and I believe that trusted computers are always able to read the phone's data ("Trusted computers can sync with your iOS device, create backups, and access your device's photos, videos, contacts, and other content" - https://support.apple.com/en-us/HT202778). I think the other answers on SO referencing this technique are no longer valid with more recent versions of iOS. Indeed, I am always able to download the container using XCode and view the app's data using iPhone Explorer. So how to test...
1 - Create an archive and ensure that it is has the proper entitlements by running the following on the .app file from the command line:
codesign -d --entitlements :- <path_to_app_binary>
You should see a key/value pair that represents your Data Protection level. In this example, NSFileProtectionComplete:
<key>com.apple.developer.default-data-protection</key>
<string>NSFileProtectionComplete</string>
In addition, I used the following two techniques to satisfy myself that the data protection is indeed working. They both require code changes.
2 - Add some code to verify that the proper NSFileProtectionKey is being set on your files and/or core data store:
NSFileManager.defaultManager().attributesOfItemAtPath(dbPath.path!)
If I print this out on one of my files I get:
["NSFileCreationDate": 2016-10-14 02:06:39 +0000, "NSFileGroupOwnerAccountName": mobile, "NSFileType": NSFileTypeRegular, "NSFileSystemNumber": 16777218, "NSFileOwnerAccountName": mobile, "NSFileReferenceCount": 1, "NSFileModificationDate": 2016-10-14 02:06:39 +0000, "NSFileExtensionHidden": 0, "NSFileSize": 81920, "NSFileGroupOwnerAccountID": 501, "NSFileOwnerAccountID": 501, "NSFilePosixPermissions": 420, "NSFileProtectionKey": NSFileProtectionComplete, "NSFileSystemFileNumber": 270902]
Note the "NSFileProtectionKey": "NSFileProtectionComplete" pair.
3 - Modify the following code and hook it up to some button in your app.
#IBAction func settingButtonTouch(sender: AnyObject) {
updateTimer = NSTimer.scheduledTimerWithTimeInterval(0.5, target: self,
selector: #selector(TabbedOverviewViewController.runTest), userInfo: nil, repeats: true)
registerBackgroundTask()
}
var backgroundTask: UIBackgroundTaskIdentifier = UIBackgroundTaskInvalid
var updateTimer: NSTimer?
func registerBackgroundTask() {
backgroundTask = UIApplication.sharedApplication().beginBackgroundTaskWithExpirationHandler {
[unowned self] in
self.endBackgroundTask()
}
assert(backgroundTask != UIBackgroundTaskInvalid)
}
func endBackgroundTask() {
NSLog("Background task ended.")
UIApplication.sharedApplication().endBackgroundTask(backgroundTask)
backgroundTask = UIBackgroundTaskInvalid
}
func runTest() {
switch UIApplication.sharedApplication().applicationState {
case .Active:
NSLog("App is active.")
checkFiles()
case .Background:
NSLog("App is backgrounded.")
checkFiles()
case .Inactive:
break
}
}
func checkFiles() {
// attempt to access a protected resource, i.e. a core data store or file
}
When you tap the button this code begins executing the checkFiles method every .5 seconds. This should run indefinitely with the app in the foreground or background - until you lock your phone. At that point it should reliably fail after roughly 10 seconds - exactly as described in the description of NSFileProtectionComplete.
We need to understand how Data Protection works.
Actually, you don't even need to enable it. Starting with iOS7, the default protection level is “File Protection Complete until first user authentication.”
This means that the files are not accessible until the user unlocks the device for the first time. After that, the files remain accessible even when the device is locked and until it shuts down or reboots.
The other thing is that you're going to see the app's data on a trusted computer always - regardless of the Data Protection level setting.
However, the data can’t be accessed if somebody tries to read them from the flash drive directly. The purpose of Data Protection is to ensure that sensitive data can’t be extracted from a password-protected device’s storage.
After running this code, I could still access and read the contents written to protectedFileURL, even after locking the device.
do {
try data.write(to: protectedFileURL, options: .completeFileProtectionUnlessOpen)
} catch {
print(error)
}
But that's normal since I ran iExplorer on a trusted computer.
And for the same reason, it's fine if you see your sqlite file.
The situation is different if your device gets lost or stolen. A hacker won't be able to read the sqlite file since it's encrypted. Well, unless he guesses your passcode somehow.
Swift 5.0 & Xcode 11:
Enable "Data Protection" in "Capabilities".
Use the following code to protect a file or folder at a specific path:
// Protects a file or folder + excludes it from backup.
// - parameter path: Path component of the file.
// - parameter fileProtectionType: `FileProtectionType`.
// - returns: True, when protected successful.
static func protectFileOrFolderAtPath(_ path: String, fileProtectionType: FileProtectionType) -> Bool {
guard FileManager.default.fileExists(atPath: path) else { return false }
let fileProtectionAttrs = [FileAttributeKey.protectionKey: fileProtectionType]
do {
try FileManager.default.setAttributes(fileProtectionAttrs, ofItemAtPath: path)
return true
} catch {
assertionFailure("Failed protecting path with error: \(error).")
return false
}
}
(Optional) Use the following code to check whether the file or folder at the specific path is protected (note: This only works on physical devices):
/// Returns true, when the file at the provided path is protected.
/// - parameter path: Path of the file to check.
/// - note: Returns true, for simulators. Simulators do not have hardware file encryption. This feature is only available for real devices.
static func isFileProtectedAtPath(_ path: String) -> Bool {
guard !Environment.isSimulator else { return true } // file protection does not work on simulator!
do {
let attributes = try FileManager.default.attributesOfItem(atPath: path)
if attributes.contains(where: { $0.key == .protectionKey }) {
return true
} else {
return false
}
} catch {
assertionFailure(String(describing: error))
return false
}
}
Rather than encrypt a file at the local level I set NSFileProtectionComplete for the app as a whole.
Create the file 'entitlements.plist' in your apps root folder with the following content.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>DataProtectionClass</key>
<string>NSFileProtectionComplete</string>
</dict>
</plist>
Then if you haven't already done so already (this could be the problem with your file level encryption) enable Data Protection in your apps capabilities.
I need to implement webdav in my application. So the user can edit word document, without need to download and back it upload to the server. However, the problem now, the document saved on webdav server are encrypted. Is it possible to use webdav for encrypted file?
Or another words, is it possible to make http-GET request to encrypted file
2080.enc (which actually encrypted word document)
[GET] /DAV/2016/02/2080.enc
and get a decrypted file word document as a response, so I can edit the word document? Many thanks
Regards
===============================================================
===============================================================
Here is actually the problem..
On the client side, I am going to download the document stored on webdav server like this
#item.GetDocumentActionTitle
<object id="winFirefoxPlugin" type="application/x-sharepoint" width="0" height="0" style="visibility: hidden;"></object>
<script>
function officelink(sDocumentUrl) {
$.get(sDocumentUrl, null, function (data) {
try {
new ActiveXObject("SharePoint.OpenDocuments.4").EditDocument(data);
return false;
}
catch (e) {
try {
document.getElementById("winFirefoxPlugin").EditDocument(data);
return false;
}
catch (e2) {
return true;
}
}
});
}
However, the url must be full path including domain name like this http://webdavserver.com/2016/02/2080.doc..
It work perfectly if it is a word document (2080.doc), however what actually stored in the server is NOT 2089.doc BUT 2080.sec (enrcypted word document)
If it is NOT word document, The function EditDocument wont be able to read the file. And later by saving the file, it must be encrypted as well
Can you understand my problem? What should I do?
Thanks