Fix file hash for split files with irregular filesize

IRDKit/IRDKit.csproj

@@ -9,7 +9,7 @@
     <RuntimeIdentifiers>win-x86;win-x64;win-arm64;linux-x64;linux-arm64;osx-x64;osx-arm64</RuntimeIdentifiers>
     <LangVersion>latest</LangVersion>
 	<TreatWarningsAsErrors>true</TreatWarningsAsErrors>
-    <Version>0.4.0</Version>
+    <Version>0.4.1</Version>
     
     <!-- Package Properties -->
     <Authors>Deterous</Authors>

IRDKit/Program.cs

@@ -610,7 +610,9 @@ namespace IRDKit
                     missingOffsets1.Add(IRD2.FileKeys[i]);
             }
             // Print the file offsets that differ
+            if (missingOffsets1.Count > 0)
                 printText.AppendLine($"File Offsets not Present in {irdPath1}: {string.Join(", ", missingOffsets1)}");
+            if (missingOffsets2.Count > 0)
             printText.AppendLine($"File Offsets not Present in {irdPath2}: {string.Join(", ", missingOffsets2)}");
 
             // Print any extra config data difference

LibIRD/IRD.cs

@@ -946,23 +946,22 @@ namespace LibIRD
                     if (fileClusters[i].Offset < smallestOffset)
                         smallestOffset = fileClusters[i].Offset;
                 }
-                int firstSector = (int)(smallestOffset);
 
                 // If already encountered file offset, skip this file
-                if (Array.Exists(FileKeys, element => element == firstSector))
+                if (Array.Exists(FileKeys, element => element == smallestOffset))
                     continue;
 
                 if (fileClusters.Length > 1)
                     Console.WriteLine($"Split file detected: {filePath}");
 
                 // Add file offset to keys
-                FileKeys[FileCount] = firstSector;
+                FileKeys[FileCount] = smallestOffset;
 
                 // Determine whether file is in encrypted or decrypted region
                 bool encrypted = false;
                 for (int i = RegionCount - 1; i > 0; i--)
                 {
-                    if (RegionStart[i] <= firstSector)
+                    if (RegionStart[i] <= smallestOffset)
                     {
                         encrypted = i % 2 == 1;
                         break;
@@ -986,7 +985,7 @@ namespace LibIRD
                             throw new InvalidFileSystemException("Disc region ended unexpectedly");
                         // Decrypt sector if necessary
                         if (encrypted)
-                            buf = DecryptSector(buf, firstSector + j);
+                            buf = DecryptSector(buf, (int)fileClusters[i].Offset + j);
                         // Hash sector
                         md5.TransformBlock(buf, 0, numBytes, null, 0);
                     }
@@ -999,7 +998,7 @@ namespace LibIRD
                             throw new InvalidFileSystemException("Disc region ended unexpectedly");
                         // Decrypt partial sector if necessary
                         if (encrypted)
-                            buf = DecryptSector(buf, firstSector + (int)(fileClusters[i].Count / SectorSize));
+                            buf = DecryptSector(buf, (int)fileClusters[i].Offset + (int)(fileClusters[i].Count / SectorSize));
                         // Hash partial sector
                         md5.TransformBlock(buf, 0, (int)(fileClusters[i].Count % SectorSize), null, 0);
                     }

LibIRD/LibIRD.csproj

@@ -6,7 +6,7 @@
     <RuntimeIdentifiers>win-x86;win-x64;win-arm64;linux-x64;linux-arm64;osx-x64;osx-arm64</RuntimeIdentifiers>
     <LangVersion>latest</LangVersion>
 	<TreatWarningsAsErrors>true</TreatWarningsAsErrors>
-    <Version>0.4.0</Version>
+    <Version>0.4.1</Version>
     <PackageOutputPath>../nupkg</PackageOutputPath>
     
     <!-- Package Properties -->

LibIRD/PS3_DiscSFB.cs

@@ -131,6 +131,11 @@ namespace LibIRD
             }
         }
 
+        /// <summary>
+        /// Define JSON options once
+        /// </summary>
+        private readonly JsonSerializerOptions JsonOpts = new() { WriteIndented = true };
+
         /// <summary>
         /// Prints parameters extracted from PS3_DISC.SFB to a json object
         /// </summary>
@@ -138,7 +143,7 @@ namespace LibIRD
         public void PrintJson(string jsonPath = null)
         {
             // Serialise PS3_Disc.SFB data to a JSON object
-            string json = JsonSerializer.Serialize(Field, new JsonSerializerOptions { WriteIndented = true });
+            string json = JsonSerializer.Serialize(Field, JsonOpts);
 
             // If no path given, output to console
             if (jsonPath == null)

LibIRD/ParamSFO.cs

@@ -159,6 +159,11 @@ namespace LibIRD
             }
         }
 
+        /// <summary>
+        /// Define JSON options once
+        /// </summary>
+        private readonly JsonSerializerOptions JsonOpts = new() { WriteIndented = true };
+
         /// <summary>
         /// Prints parameters extracted from PARAM.SFO to a json object
         /// </summary>
@@ -166,7 +171,7 @@ namespace LibIRD
         public void PrintJson(string jsonPath = null)
         {
             // Serialise PS3_Disc.SFB data to a JSON object
-            string json = JsonSerializer.Serialize(Field, new JsonSerializerOptions { WriteIndented = true });
+            string json = JsonSerializer.Serialize(Field, JsonOpts);
 
             // If no path given, output to console
             if (jsonPath == null)

LibIRD/ReIRD.cs

@@ -2,7 +2,6 @@
 using System;
 using System.IO;
 using System.IO.Hashing;
-using System.Security;
 
 namespace LibIRD
 {