[SG-671] OTP Menu Screen causes Crash on Android (#2097)

* [SG-671] removed unnecessary calc of otpauth period. protected cal of otpauth from crashing the app if url has a wrong format.

* [SG-671] changed logger

* [SG-671] Refactored GetQueryParams code to used HttpUtility.ParseQueryString.

* [SG-671] refactor and null protection.

* [SG-671] code format

* [SG-671] fixed bug where totp circle countdown was fixed to 30.

* [SG-167] added fallback for uri check. Changed all default totp timers to constant.

* [SG-671] missed unsaved file

* [SG-671] simplified code

src/App/Pages/Vault/CipherDetailsPageViewModel.cs

@@ -40,8 +40,8 @@ namespace Bit.App.Pages
         private string _totpCode;
         private string _totpCodeFormatted;
         private string _totpSec;
+        private double _totpInterval = Constants.TotpDefaultTimer;
         private bool _totpLow;
-        private DateTime? _totpInterval = null;
         private string _previousCipherId;
         private byte[] _attachmentData;
         private string _attachmentFilename;
@@ -241,7 +241,7 @@ namespace Bit.App.Pages
                 Page.Resources["textTotp"] = ThemeManager.Resources()[value ? "text-danger" : "text-default"];
             }
         }
-        public double TotpProgress => string.IsNullOrEmpty(TotpSec) ? 0 : double.Parse(TotpSec) * 100 / 30;
+        public double TotpProgress => string.IsNullOrEmpty(TotpSec) ? 0 : double.Parse(TotpSec) * 100 / _totpInterval;
         public bool IsDeleted => Cipher.IsDeleted;
         public bool CanEdit => !Cipher.IsDeleted;
 
@@ -265,6 +265,7 @@ namespace Bit.App.Pages
             {
                 _totpTickHelper = new TotpHelper(Cipher);
                 _totpTickCancellationToken?.Cancel();
+                _totpInterval = _totpTickHelper.Interval;
                 _totpTickCancellationToken = new CancellationTokenSource();
                 _totpTickTask = new TimerTask(_logger, StartCiphersTotpTick, _totpTickCancellationToken).RunPeriodic();
             }
@@ -284,6 +285,7 @@ namespace Bit.App.Pages
                 await _totpTickHelper.GenerateNewTotpValues();
                 TotpSec = _totpTickHelper.TotpSec;
                 TotpCodeFormatted = _totpTickHelper.TotpCodeFormatted;
+                _totpInterval = _totpTickHelper.Interval;
             }
             catch (Exception ex)
             {
@@ -429,7 +431,6 @@ namespace Bit.App.Pages
         {
             if (Cipher == null || Cipher.Type != Core.Enums.CipherType.Login || Cipher.Login.Totp == null)
             {
-                _totpInterval = null;
                 return;
             }
             _totpCode = await _totpService.GetCodeAsync(Cipher.Login.Totp);
@@ -449,7 +450,6 @@ namespace Bit.App.Pages
             else
             {
                 TotpCodeFormatted = null;
-                _totpInterval = null;
             }
         }
 

src/App/Pages/Vault/GroupingsPage/GroupingsPageTOTPListItem.cs

@@ -22,7 +22,6 @@ namespace Bit.App.Pages
         private bool _websiteIconsEnabled;
         private string _iconImageSource = string.Empty;
 
-        public int interval { get; set; }
         private double _progress;
         private string _totpSec;
         private string _totpCodeFormatted;
@@ -37,7 +36,6 @@ namespace Bit.App.Pages
 
             Cipher = cipherView;
             WebsiteIconsEnabled = websiteIconsEnabled;
-            interval = _totpService.GetTimeInterval(Cipher.Login.Totp);
             CopyCommand = new AsyncCommand(CopyToClipboardAsync,
                  onException: ex => _logger.Value.Exception(ex),
                  allowsMultipleExecutions: false);

src/App/Utilities/TotpHelper.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Threading.Tasks;
+using Bit.Core;
 using Bit.Core.Abstractions;
 using Bit.Core.Models.View;
 using Bit.Core.Utilities;
@@ -10,26 +11,26 @@ namespace Bit.App.Utilities
     {
         private ITotpService _totpService;
         private CipherView _cipher;
-        private int _interval;
 
         public TotpHelper(CipherView cipher)
         {
             _totpService = ServiceContainer.Resolve<ITotpService>("totpService");
             _cipher = cipher;
-            _interval = _totpService.GetTimeInterval(cipher?.Login?.Totp);
+            Interval = _totpService.GetTimeInterval(cipher?.Login?.Totp);
         }
 
         public string TotpSec { get; private set; }
         public string TotpCodeFormatted { get; private set; }
         public double Progress { get; private set; }
+        public double Interval { get; private set; } = Constants.TotpDefaultTimer;
 
         public async Task GenerateNewTotpValues()
         {
             var epoc = CoreHelpers.EpocUtcNow() / 1000;
-            var mod = epoc % _interval;
+            var mod = epoc % Interval;
-            var totpSec = _interval - mod;
+            var totpSec = Interval - mod;
             TotpSec = totpSec.ToString();
-            Progress = totpSec * 100 / 30;
+            Progress = totpSec * 100 / Interval;
             if (mod == 0 || string.IsNullOrEmpty(TotpCodeFormatted))
             {
                 TotpCodeFormatted = await TotpUpdateCodeAsync();

src/Core/Constants.cs

@@ -33,6 +33,7 @@
         public const int SelectFileRequestCode = 42;
         public const int SelectFilePermissionRequestCode = 43;
         public const int SaveFileRequestCode = 44;
+        public const int TotpDefaultTimer = 30;
 
         public static readonly string[] AndroidAllClearCipherCacheKeys =
         {

src/Core/Services/TotpService.cs

@@ -24,7 +24,7 @@ namespace Bit.Core.Services
             {
                 return null;
             }
-            var period = 30;
+            var period = Constants.TotpDefaultTimer;
             var alg = CryptoHashAlgorithm.Sha1;
             var digits = 6;
             var keyB32 = key;
@@ -117,7 +117,7 @@ namespace Bit.Core.Services
 
         public int GetTimeInterval(string key)
         {
-            var period = 30;
+            var period = Constants.TotpDefaultTimer;
             if (key != null && key.ToLowerInvariant().StartsWith("otpauth://"))
             {
                 var qsParams = CoreHelpers.GetQueryParams(key);

src/Core/Utilities/CoreHelpers.cs

@@ -2,7 +2,9 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Text.RegularExpressions;
+using System.Web;
 using Bit.Core.Models.Domain;
+using Bit.Core.Services;
 using Newtonsoft.Json;
 
 namespace Bit.Core.Utilities
@@ -182,26 +184,20 @@ namespace Bit.Core.Utilities
 
         public static Dictionary<string, string> GetQueryParams(string urlString)
         {
-            var dict = new Dictionary<string, string>();
+            try
+            {
                 if (!Uri.TryCreate(urlString, UriKind.Absolute, out var uri) || string.IsNullOrWhiteSpace(uri.Query))
                 {
-                return dict;
+                    return new Dictionary<string, string>();
                 }
-            var pairs = uri.Query.Substring(1).Split('&');
+                var queryStringNameValueCollection = HttpUtility.ParseQueryString(uri.Query);
-            foreach (var pair in pairs)
+                return queryStringNameValueCollection.AllKeys.Where(k => k != null).ToDictionary(k => k, k => queryStringNameValueCollection[k]);
+            }
+            catch (Exception ex)
             {
-                var parts = pair.Split('=');
+                LoggerHelper.LogEvenIfCantBeResolved(ex);
-                if (parts.Length < 1)
-                {
-                    continue;
             }
-                var key = System.Net.WebUtility.UrlDecode(parts[0]).ToLower();
+            return new Dictionary<string, string>();
-                if (!dict.ContainsKey(key))
-                {
-                    dict.Add(key, parts[1] == null ? string.Empty : System.Net.WebUtility.UrlDecode(parts[1]));
-                }
-            }
-            return dict;
         }
 
         public static string SerializeJson(object obj, bool ignoreNulls = false)