Fix bug for small encrypted regions

IRDKit/IRDKit.csproj

@@ -5,13 +5,13 @@
     <OutputType>Exe</OutputType>
     <TargetName>irdkit</TargetName>
     <AssemblyName>irdkit</AssemblyName>
-    <TargetFrameworks>net462;net472;net48;netcoreapp3.1;net5.0;net6.0;net7.0;net8.0</TargetFrameworks>
+	<TargetFrameworks>net6.0;net7.0;net8.0</TargetFrameworks>
     <RuntimeIdentifiers>win-x86;win-x64;win-arm64;linux-x64;linux-arm64;osx-x64;osx-arm64</RuntimeIdentifiers>
-	<CheckEolTargetFramework>false</CheckEolTargetFramework>
+    <CheckEolTargetFramework>false</CheckEolTargetFramework>
     <LangVersion>latest</LangVersion>
-	<SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings>
+    <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
-    <Version>0.7.0</Version>
+    <Version>0.8.0</Version>
     
     <!-- Package Properties -->
     <Authors>Deterous</Authors>
@@ -30,7 +30,7 @@
 
   <ItemGroup>
     <PackageReference Include="CommandLineParser" Version="2.9.1" />
-    <PackageReference Include="SabreTools.Hashing" Version="1.1.3" />
+    <PackageReference Include="SabreTools.Hashing" Version="1.1.4" />
     <PackageReference Include="SabreTools.RedumpLib" Version="1.3.4" />
   </ItemGroup>
 

LibIRD/IRD.cs

@@ -413,7 +413,11 @@ namespace LibIRD
                 throw new ArgumentException("Disc Key must be a byte array of length 16", nameof(key));
 
             // Setup AES decryption
+#if NET35_OR_GREATER || NETCOREAPP
             using Aes aes = Aes.Create() ?? throw new InvalidOperationException("AES not available. Change your system settings");
+#else
+            using Rijndael aes = Rijndael.Create() ?? throw new InvalidOperationException("AES not available. Change your system settings"); ;
+#endif
 
             // Set AES settings
             aes.Key = D1AesKey;
@@ -446,7 +450,11 @@ namespace LibIRD
                 throw new ArgumentException("Disc Key must be a byte array of length 16", nameof(d1));
 
             // Setup AES decryption
+#if NET35_OR_GREATER || NETCOREAPP
             using Aes aes = Aes.Create() ?? throw new InvalidOperationException("AES not available. Change your system settings");
+#else
+            using Rijndael aes = Rijndael.Create() ?? throw new InvalidOperationException("AES not available. Change your system settings"); ;
+#endif
 
             // Set AES settings
             aes.Key = D1AesKey;
@@ -478,7 +486,11 @@ namespace LibIRD
             if (d2.Length != 16) throw new ArgumentException("Disc ID must be a byte array of length 16", nameof(d2));
 
             // Setup AES encryption
+#if NET35_OR_GREATER || NETCOREAPP
             using Aes aes = Aes.Create() ?? throw new InvalidOperationException("AES not available. Change your system settings");
+#else
+            using Rijndael aes = Rijndael.Create() ?? throw new InvalidOperationException("AES not available. Change your system settings"); ;
+#endif
 
             // Set AES settings
             aes.Key = D2AesKey;
@@ -511,7 +523,11 @@ namespace LibIRD
                 throw new ArgumentException("Disc ID must be a byte array of length 16", nameof(d2));
 
             // Setup AES encryption
+#if NET35_OR_GREATER || NETCOREAPP
             using Aes aes = Aes.Create() ?? throw new InvalidOperationException("AES not available. Change your system settings");
+#else
+            using Rijndael aes = Rijndael.Create() ?? throw new InvalidOperationException("AES not available. Change your system settings"); ;
+#endif
 
             // Set AES settings
             aes.Key = D2AesKey;
@@ -737,7 +753,7 @@ namespace LibIRD
             HashISO(fs, redump && UID == 0x00000000);
         }
 
-        #endregion
+#endregion
 
         #region Reading ISO
 
@@ -989,7 +1005,12 @@ namespace LibIRD
                 throw new ArgumentException("Number of sectors must be within buffer");
 
             // Setup AES decryption
+#if NET35_OR_GREATER || NETCOREAPP
             using Aes aes = Aes.Create() ?? throw new InvalidOperationException("AES not available. Change your system settings");
+#else
+            using Rijndael aes = Rijndael.Create() ?? throw new InvalidOperationException("AES not available. Change your system settings"); ;
+#endif
+
             // Set AES settings
             aes.Key = DiscKey;
             aes.Padding = PaddingMode.None;
@@ -1035,6 +1056,10 @@ namespace LibIRD
                 CountFiles(dirInfo);
         }
 
+        #endregion
+
+        #region Hashing
+
         /// <summary>
         /// Calculate hashes for all region and file extents
         /// </summary>
@@ -1180,7 +1205,7 @@ namespace LibIRD
 
                         // Don't decrypt last sectors if the encrypted region ends within this buffer
                         if (RegionEnd[i] < currentSector + bufSectors)
-                            encCount -= (int)(currentSector + bufSectors - RegionEnd[i] + 1);
+                            encCount -= (int)(currentSector + bufSectors - RegionEnd[i] - 1);
 
                         // Decrypt encrypted sectors
                         DecryptSectors(ref buf, (int)currentSector + encOffset, encOffset, encCount);
@@ -1359,7 +1384,14 @@ namespace LibIRD
 #endif
             // Write entire gzipped IRD stream to file
             stream.Position = 0;
+#if NET40_OR_GREATER || NETCOREAPP
             stream.CopyTo(gzStream);
+#else
+            byte[] buffer = new byte[1024];
+            int numBytes;
+            while ((numBytes = stream.Read(buffer, 0, buffer.Length)) > 0)
+                gzStream.Write(buffer, 0, numBytes);
+#endif
         }
 
         /// <summary>
@@ -1571,7 +1603,7 @@ namespace LibIRD
             }
         }
 
-        #endregion
+#endregion
 
         #region Helper Functions
 

LibIRD/LibIRD.csproj

@@ -2,13 +2,12 @@
 
   <PropertyGroup>
     <!-- Assembly Properties -->
-    <TargetFrameworks>net462;net472;net48;netcoreapp3.1;net5.0;net6.0;net7.0;net8.0</TargetFrameworks>
     <RuntimeIdentifiers>win-x86;win-x64;win-arm64;linux-x64;linux-arm64;osx-x64;osx-arm64</RuntimeIdentifiers>
-	<CheckEolTargetFramework>false</CheckEolTargetFramework>
+    <CheckEolTargetFramework>false</CheckEolTargetFramework>
     <LangVersion>latest</LangVersion>
-	<SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings>
+    <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
-    <Version>0.7.0</Version>
+    <Version>0.8.0</Version>
     <PackageOutputPath>../nupkg</PackageOutputPath>
     
     <!-- Package Properties -->
@@ -22,6 +21,14 @@
     <PackageLicenseExpression>GPL-3.0-only</PackageLicenseExpression>
     <GeneratePackageOnBuild>True</GeneratePackageOnBuild>
   </PropertyGroup>
+  
+  <PropertyGroup Condition="$(RuntimeIdentifier.StartsWith(`osx-arm`))">
+    <TargetFrameworks>net6.0;net7.0;net8.0</TargetFrameworks>
+  </PropertyGroup>
+  
+  <PropertyGroup Condition="!$(RuntimeIdentifier.StartsWith(`osx-arm`))">
+    <TargetFrameworks>net20;net35;net40;net452;net462;net472;net48;netcoreapp3.1;net5.0;net6.0;net7.0;net8.0</TargetFrameworks>
+  </PropertyGroup>
 
   <ItemGroup>
     <None Include="./README.md" Pack="true" PackagePath="" />
@@ -29,7 +36,7 @@
 
   <ItemGroup>
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
-    <PackageReference Include="SabreTools.Hashing" Version="1.1.3" />
+    <PackageReference Include="SabreTools.Hashing" Version="1.1.4" />
   </ItemGroup>
 
 </Project>