search

mogol / flutter_secure_storage

A Flutter plugin to store data in secure storage
https://pub.dartlang.org/packages/flutter_secure_storage
BSD 3-Clause "New" or "Revised" License
1.11k stars 360 forks source link

Retrieving stored JWT returns NULL after some time. #358

Closed k-zen closed 2 weeks ago

k-zen commented 2 years ago

I'm encountering the following behaviour when using version 5 onwards of flutter_secure_storage.

Problem: If I store a JWT token in secure storage and try to retrieve it returns NULL. I can verify that the key is set, since the routine containsKey returns TRUE, and if I access it right after setting it, it returns the JWT correctly. But the problem arises when trying to access it after some undefined time frame, it starts to return NULL.

Devices: This behaviour was observed on iOS devices, both a real device running iOS 12.4 and a iOS simulator running iOS 15.0. I didn't try this on an Android device or emulator.

Solution: After much debugging I can verify that this is not related to my own code, and the problem went away when I downgraded flutter_secure_storage to version 4.2.1.

Addendum: I tried other solutions, like reading all keys when the App starts or even before accessing individual keys, none worked.

Output of the command flutter doctor -v:

[✓] Flutter (Channel stable, 2.8.1, on macOS 12.1 21C52 darwin-x64, locale en-CA)
    • Flutter version 2.8.1 at /Users/akc/Applications/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 77d935af4d (6 weeks ago), 2021-12-16 08:37:33 -0800
    • Engine revision 890a5fca2e
    • Dart version 2.15.1

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
    • Android SDK at /Users/akc/Library/Android/sdk
    • Platform android-31, build-tools 30.0.3
    • ANDROID_HOME = /Users/akc/Library/Android/sdk
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6915495)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 13.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • CocoaPods version 1.11.2

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 4.1)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6915495)

[☠] IntelliJ IDEA Ultimate Edition (the doctor check crashed)
    ✗ Due to an error, the doctor check did not complete. If the error message below is not helpful, please let us know about this issue at https://github.com/flutter/flutter/issues.
    ✗ FormatException: Unexpected extension byte (at offset 5)
    • #0      _Utf8Decoder.convertSingle (dart:convert-patch/convert_patch.dart:1789:7)
      #1      Utf8Decoder.convert (dart:convert/utf.dart:318:42)
      #2      InputStream.readString (package:archive/src/util/input_stream.dart:207:30)
      #3      new ZipDirectory.read (package:archive/src/zip/zip_directory.dart:40:30)
      #4      ZipDecoder.decodeBuffer (package:archive/src/zip_decoder.dart:19:30)
      #5      ZipDecoder.decodeBytes (package:archive/src/zip_decoder.dart:14:12)
      #6      IntelliJPlugins._findPluginXml (package:flutter_tools/src/intellij/intellij.dart:130:44)
      #7      IntelliJPlugins._readPackageVersion (package:flutter_tools/src/intellij/intellij.dart:141:40)
      #8      IntelliJPlugins.validatePackage (package:flutter_tools/src/intellij/intellij.dart:63:35)
      #9      IntelliJValidator.validate (package:flutter_tools/src/intellij/intellij_validator.dart:103:15)
      #10     asyncGuard.<anonymous closure> (package:flutter_tools/src/base/async_guard.dart:111:32)
      #11     asyncGuard.<anonymous closure> (package:flutter_tools/src/base/async_guard.dart:109:18)
      #12     _rootRun (dart:async/zone.dart:1428:13)
      #13     _CustomZone.run (dart:async/zone.dart:1328:19)
      #14     _runZoned (dart:async/zone.dart:1863:10)
      #15     runZonedGuarded (dart:async/zone.dart:1851:12)
      #16     runZoned (dart:async/zone.dart:1782:12)
      #17     asyncGuard (package:flutter_tools/src/base/async_guard.dart:109:3)
      #18     Doctor.startValidatorTasks (package:flutter_tools/src/doctor.dart:197:9)
      #19     Doctor.diagnose (package:flutter_tools/src/doctor.dart:301:47)
      #20     DoctorCommand.runCommand (package:flutter_tools/src/commands/doctor.dart:53:47)
      #21     FlutterCommand.verifyThenRunCommand (package:flutter_tools/src/runner/flutter_command.dart:1290:12)
      <asynchronous suspension>
      #22     FlutterCommand.run.<anonymous closure> (package:flutter_tools/src/runner/flutter_command.dart:1140:27)
      <asynchronous suspension>
      #23     AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:150:19)
      <asynchronous suspension>
      #24     CommandRunner.runCommand (package:args/command_runner.dart:209:13)
      <asynchronous suspension>
      #25     FlutterCommandRunner.runCommand.<anonymous closure> (package:flutter_tools/src/runner/flutter_command_runner.dart:288:9)
      <asynchronous suspension>
      #26     AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:150:19)
      <asynchronous suspension>
      #27     FlutterCommandRunner.runCommand (package:flutter_tools/src/runner/flutter_command_runner.dart:236:5)
      <asynchronous suspension>
      #28     run.<anonymous closure>.<anonymous closure> (package:flutter_tools/runner.dart:62:9)
      <asynchronous suspension>
      #29     AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:150:19)
      <asynchronous suspension>
      #30     main (package:flutter_tools/executable.dart:94:3)
      <asynchronous suspension>

[✓] VS Code (version 1.63.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension can be installed from:
      🔨 https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter

[✓] Connected device (1 available)
    • Chrome (web) • chrome • web-javascript • Google Chrome 97.0.4692.99
    ! Error: Unable to prepare K-Zen's iPhone 2.0 for development.  (code -1)

! Doctor found issues in 1 category.
AndreiMisiukevich commented 2 years ago

Looks related https://github.com/mogol/flutter_secure_storage/issues/223

jointhejourney commented 1 year ago

Unfortunately, this problem still occurs on MacOS version 7.0.1. I had to use the desktop_lifecycle plugin to detect when my app is not active to preemptively handle null values from flutter_secure_storage.

longtn-imt commented 5 months ago

is there any update on this?

juliansteenbakker commented 2 weeks ago

I am closing all older issues. If this issue still exists in the latest version, please let me know.