Issue #65 ValidateTwoFactorPin always returns false, if the secretKey parameter is base32 encoded string - fixed

.gitignore

@@ -194,3 +194,11 @@ FakesAssemblies/
 # Visual Studio 6 workspace options file
 *.opt
 .vscode/
+.idea/.idea.Google.Authenticator/.idea/.name
+.idea/.idea.Google.Authenticator/.idea/codeStyles/codeStyleConfig.xml
+.idea/.idea.Google.Authenticator/.idea/encodings.xml
+.idea/.idea.Google.Authenticator/.idea/indexLayout.xml
+.idea/.idea.Google.Authenticator/.idea/projectSettingsUpdater.xml
+.idea/.idea.Google.Authenticator/.idea/vcs.xml
+.idea/.idea.Google.Authenticator/.idea/workspace.xml
+.idea/config/applicationhost.config

Google.Authenticator.Tests/AuthCodeTest.cs

@@ -1,6 +1,6 @@
-using System;
-using Xunit;
+using System.Text;
 using Shouldly;
+using Xunit;
 
 namespace Google.Authenticator.Tests
 {
@@ -9,17 +9,35 @@ public class AuthCodeTest
         [Fact]
         public void BasicAuthCodeTest()
         {
-            string secretKey = "PJWUMZKAUUFQKJBAMD6VGJ6RULFVW4ZH";
-            string expected = "551508";
+            var secretKey = "PJWUMZKAUUFQKJBAMD6VGJ6RULFVW4ZH";
+            var expected = "551508";
+
+            var tfa = new TwoFactorAuthenticator();
 
-            TwoFactorAuthenticator tfa = new TwoFactorAuthenticator();
-
-            long currentTime = 1416643820;
+            var currentTime = 1416643820;
 
-            // I actually think you are supposed to divide the time by 30 seconds? Maybe need an overload that takes a DateTime?
+            // I actually think you are supposed to divide the time by 30 seconds?
+            // Maybe need an overload that takes a DateTime?
             var actual = tfa.GeneratePINAtInterval(secretKey, currentTime, 6);
 
-            actual.ShouldBe(expected);   
+            actual.ShouldBe(expected);
+        }
+
+        [Fact]
+        public void Base32AuthCodeTest()
+        {
+            var secretKey = Base32Encoding.ToString(Encoding.UTF8.GetBytes("PJWUMZKAUUFQKJBAMD6VGJ6RULFVW4ZH"));
+            var expected = "551508";
+
+            var tfa = new TwoFactorAuthenticator();
+
+            var currentTime = 1416643820;
+
+            // I actually think you are supposed to divide the time by 30 seconds?
+            // Maybe need an overload that takes a DateTime?
+            var actual = tfa.GeneratePINAtInterval(secretKey, currentTime, 6, true);
+
+            actual.ShouldBe(expected);
         }
     }
-}
+}

Google.Authenticator.Tests/Google.Authenticator.Tests.csproj

@@ -1,21 +1,26 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.0;net452</TargetFrameworks>
+    <TargetFrameworks>netcoreapp3.0;net452;net5</TargetFrameworks>
 
     <IsPackable>false</IsPackable>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.2.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.10.0" />
     <PackageReference Include="Shouldly" Version="3.0.2" />
-    <PackageReference Include="xunit" Version="2.4.0" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.0" />
-    <PackageReference Include="coverlet.collector" Version="1.0.1" />
+    <PackageReference Include="xunit" Version="2.4.1" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="coverlet.collector" Version="3.0.3">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
   </ItemGroup>
 
   <ItemGroup>
     <ProjectReference Include="..\Google.Authenticator\Google.Authenticator.csproj" />
   </ItemGroup>
-
-</Project>
+</Project>

Google.Authenticator.Tests/QRCodeTest.cs

@@ -1,4 +1,3 @@
-using System;
 using Xunit;
 using Shouldly;
 
@@ -10,7 +9,13 @@ public class QRCodeTest
         public void CanGenerateQRCode()
         {
             var subject = new TwoFactorAuthenticator();
-            var setupCodeInfo = subject.GenerateSetupCode("issuer","[email protected]","secret", false, 2);
+            var setupCodeInfo = subject.GenerateSetupCode(
+                "issuer",
+                "[email protected]",
+                "secret", 
+                false, 
+                2);
+
             setupCodeInfo.QrCodeSetupImageUrl.ShouldNotBeNull();
         }
     }

Google.Authenticator/Base32Encoding.cs

@@ -16,41 +16,39 @@ public static byte[] ToBytes(string input)
         {
             if (string.IsNullOrEmpty(input))
             {
-                throw new ArgumentNullException("input");
+                throw new ArgumentNullException(nameof(input));
             }
 
             input = input.TrimEnd('='); //remove padding characters
-            int byteCount = input.Length * 5 / 8; //this must be TRUNCATED
-            byte[] returnArray = new byte[byteCount];
+            var byteCount = input.Length * 5 / 8; //this must be TRUNCATED
+            var returnArray = new byte[byteCount];
 
             byte curByte = 0, bitsRemaining = 8;
-            int mask = 0, arrayIndex = 0;
+            int mask, arrayIndex = 0;
 
-            foreach (char c in input)
+            foreach (var c in input)
             {
-                int cValue = CharToValue(c);
+                var cValue = CharToValue(c);
 
                 if (bitsRemaining > 5)
                 {
                     mask = cValue << (bitsRemaining - 5);
-                    curByte = (byte)(curByte | mask);
+                    curByte = (byte) (curByte | mask);
                     bitsRemaining -= 5;
                 }
                 else
                 {
                     mask = cValue >> (5 - bitsRemaining);
-                    curByte = (byte)(curByte | mask);
+                    curByte = (byte) (curByte | mask);
                     returnArray[arrayIndex++] = curByte;
-                    curByte = (byte)(cValue << (3 + bitsRemaining));
+                    curByte = (byte) (cValue << (3 + bitsRemaining));
                     bitsRemaining += 3;
                 }
             }
 
             //if we didn't end with a full byte
             if (arrayIndex != byteCount)
-            {
                 returnArray[arrayIndex] = curByte;
-            }
 
             return returnArray;
         }
@@ -64,29 +62,29 @@ public static string ToString(byte[] input)
         {
             if (input == null || input.Length == 0)
             {
-                throw new ArgumentNullException("input");
+                throw new ArgumentNullException(nameof(input));
             }
 
-            int charCount = (int)Math.Ceiling(input.Length / 5d) * 8;
-            char[] returnArray = new char[charCount];
+            var charCount = (int) Math.Ceiling(input.Length / 5d) * 8;
+            var returnArray = new char[charCount];
 
             byte nextChar = 0, bitsRemaining = 5;
-            int arrayIndex = 0;
+            var arrayIndex = 0;
 
-            foreach (byte b in input)
+            foreach (var b in input)
             {
-                nextChar = (byte)(nextChar | (b >> (8 - bitsRemaining)));
+                nextChar = (byte) (nextChar | (b >> (8 - bitsRemaining)));
                 returnArray[arrayIndex++] = ValueToChar(nextChar);
 
                 if (bitsRemaining < 4)
                 {
-                    nextChar = (byte)((b >> (3 - bitsRemaining)) & 31);
+                    nextChar = (byte) ((b >> (3 - bitsRemaining)) & 31);
                     returnArray[arrayIndex++] = ValueToChar(nextChar);
                     bitsRemaining += 5;
                 }
 
                 bitsRemaining -= 3;
-                nextChar = (byte)((b << bitsRemaining) & 31);
+                nextChar = (byte) ((b << bitsRemaining) & 31);
             }
 
             //if we didn't end with a full char
@@ -101,41 +99,42 @@ public static string ToString(byte[] input)
 
         private static int CharToValue(char c)
         {
-            int value = (int)c;
+            var value = (int) c;
 
             //65-90 == uppercase letters
             if (value < 91 && value > 64)
             {
                 return value - 65;
             }
+
             //50-55 == numbers 2-7
             if (value < 56 && value > 49)
             {
                 return value - 24;
             }
+
             //97-122 == lowercase letters
             if (value < 123 && value > 96)
             {
                 return value - 97;
             }
 
-            throw new ArgumentException("Character is not a Base32 character.", "c");
+            throw new ArgumentException("Character is not a Base32 character.", nameof(c));
         }
 
         private static char ValueToChar(byte b)
         {
             if (b < 26)
             {
-                return (char)(b + 65);
+                return (char) (b + 65);
             }
 
             if (b < 32)
             {
-                return (char)(b + 24);
+                return (char) (b + 24);
             }
 
-            throw new ArgumentException("Byte is not a value Base32 value.", "b");
+            throw new ArgumentException("Byte is not a value Base32 value.", nameof(b));
         }
-
     }
 }

Google.Authenticator/Google.Authenticator.csproj

@@ -1,20 +1,20 @@
 
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;net45</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;net45;net5</TargetFrameworks>
     <Product>Google Authenticator Two-Factor</Product>
     <Title>Google Authenticator Two-Factor Authentication Library</Title>
     <Description>Google Authenticator Two-Factor Authentication Library (Not officially affiliated with Google.)</Description>
     <Authors>Brandon Potter</Authors>
     <Company>Brandon Potter</Company>
-    <Version>2.1.1</Version>
+    <Version>2.2.0</Version>
     <PackageLicenseExpression>Apache-2.0</PackageLicenseExpression>
     <PackageProjectUrl>https://github.com/BrandonPotter/GoogleAuthenticator</PackageProjectUrl>
     <PackageId>GoogleAuthenticator</PackageId>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="QRCoder" Version="1.3.9" />
+    <PackageReference Include="QRCoder" Version="1.4.1" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="All" />
   </ItemGroup>
 
@@ -30,11 +30,15 @@
     <DefineConstants>NET45;NETFULL</DefineConstants>
   </PropertyGroup>
 
+  <PropertyGroup Condition=" '$(TargetFramework)' == 'net5'">
+    <DefineConstants>NET5_0;NETCOREAPP</DefineConstants>
+  </PropertyGroup>
+
   <PropertyGroup>
     <AllowedOutputExtensionsInPackageBuildOutputFolder>
       $(AllowedOutputExtensionsInPackageBuildOutputFolder);.pdb
     </AllowedOutputExtensionsInPackageBuildOutputFolder>
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
     <AssemblyVersion>2.0.1.0</AssemblyVersion>
   </PropertyGroup>
-</Project>
+</Project>

Google.Authenticator/SetupCode.cs

@@ -1,9 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-
-namespace Google.Authenticator
+namespace Google.Authenticator
 {
     public class SetupCode
     {