add compatibility with steam encoding for OTPs (e.g. otpauth://totp/test:test@example.com?secret=63BEDWCQZKTQWPESARIERL5DTTQFCJTK&issuer=Valve&algorithm=SHA1&digits=5&period=30&encoder=steam)

src/keepass2android/Totp/KeeWebOtpPluginAdapter.cs

@@ -30,13 +30,18 @@ namespace keepass2android
                 res.TotpSeed = parsedQuery.Get("secret");
                 res.Length = parsedQuery.Get("digits");
                 res.Duration = parsedQuery.Get("period");
+                res.Encoder = parsedQuery.Get("encoder");
+
+                
                 //set defaults according to https://github.com/google/google-authenticator/wiki/Key-Uri-Format
                 if (res.Length == null)
                     res.Length = "6";
                 if (res.Duration == null)
                     res.Duration = "30";
+                if (res.Encoder == null)
+                    res.Encoder = TotpData.EncoderRfc6238;
             }
-            catch (Exception)
+            catch (Exception e)
             {
                 return res;
             }

src/keepass2android/Totp/TotpData.cs

@@ -3,18 +3,22 @@ using System.Collections.Generic;
 namespace PluginTOTP
 {
 	struct TotpData
-	{
+    {
-		public bool IsTotpEnry { get; set; }
+        public const string EncoderSteam = "steam";
+        public const string EncoderRfc6238 = "rfc6238";
+
+        public bool IsTotpEnry { get; set; }
 		public string TotpSeed { get; set; }
 		public string Duration { get; set; }
-		public string Length { get; set; }
+        public string Encoder { get; set; }
+        public string Length { get; set; }
 		public string Url { get; set; }
 
 		public string[] Settings
 		{
 			get
 			{
-				List<string> settings = new List<string>() { Duration, Length};
+				List<string> settings = new List<string>() { Duration, Encoder == EncoderSteam ? "S" : Length};
 				if (Url != null)
 					settings.Add(Url);
 				return settings.ToArray();