Add support of IS-Z archives

Author: mnadareski

BurnOutSharp/FileType/InstallShieldArchiveV3.cs

@@ -0,0 +1,100 @@
+using System;
+using System.Collections.Concurrent;
+using System.IO;
+using System.Linq;
+using System.Text.RegularExpressions;
+using UnshieldSharp.Archive;
+
+namespace BurnOutSharp.FileType
+{
+    internal class InstallShieldArchiveV3 : IScannable
+    {
+        /// <inheritdoc/>
+        public bool ShouldScan(byte[] magic)
+        {
+            if (magic.StartsWith(new byte?[] { 0x13, 0x5D, 0x65, 0x8C }))
+                return true;
+
+            return false;
+        }
+
+        /// <inheritdoc/>
+        public ConcurrentDictionary<string, ConcurrentQueue<string>> Scan(Scanner scanner, string file)
+        {
+            if (!File.Exists(file))
+                return null;
+
+            using (var fs = File.OpenRead(file))
+            {
+                return Scan(scanner, fs, file);
+            }
+        }
+
+        // TODO: Add stream opening support
+        /// <inheritdoc/>
+        public ConcurrentDictionary<string, ConcurrentQueue<string>> Scan(Scanner scanner, Stream stream, string file)
+        {
+            // Get the name of the first cabinet file or header
+            string directory = Path.GetDirectoryName(file);
+            string noExtension = Path.GetFileNameWithoutExtension(file);
+            string filenamePattern = Path.Combine(directory, noExtension);
+            filenamePattern = new Regex(@"\d+$").Replace(filenamePattern, string.Empty);
+
+            bool cabinetHeaderExists = File.Exists(Path.Combine(directory, filenamePattern + "1.hdr"));
+            bool shouldScanCabinet = cabinetHeaderExists
+                ? file.Equals(Path.Combine(directory, filenamePattern + "1.hdr"), StringComparison.OrdinalIgnoreCase)
+                : file.Equals(Path.Combine(directory, filenamePattern + "1.cab"), StringComparison.OrdinalIgnoreCase);
+
+            // If we have the first file
+            if (shouldScanCabinet)
+            {
+                // If the cab file itself fails
+                try
+                {
+                    string tempPath = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());
+                    Directory.CreateDirectory(tempPath);
+
+                    UnshieldSharp.Archive.InstallShieldArchiveV3 archive = new UnshieldSharp.Archive.InstallShieldArchiveV3(file);
+                    foreach (CompressedFile cfile in archive.Files.Select(kvp => kvp.Value))
+                    {
+                        // If an individual entry fails
+                        try
+                        {
+                            string tempFile = Path.Combine(tempPath, cfile.FullPath);
+                            if (!Directory.Exists(Path.GetDirectoryName(tempFile)))
+                                Directory.CreateDirectory(Path.GetDirectoryName(tempFile));
+
+                            (byte[] fileContents, string error) = archive.Extract(cfile.FullPath);
+                            if (!string.IsNullOrWhiteSpace(error))
+                                continue;
+
+                            using (FileStream fs = File.OpenWrite(tempFile))
+                            {
+                                fs.Write(fileContents, 0, fileContents.Length);
+                            }
+                        }
+                        catch { }
+                    }
+
+                    // Collect and format all found protections
+                    var protections = scanner.GetProtections(tempPath);
+
+                    // If temp directory cleanup fails
+                    try
+                    {
+                        Directory.Delete(tempPath, true);
+                    }
+                    catch { }
+
+                    // Remove temporary path references
+                    Utilities.StripFromKeys(protections, tempPath);
+
+                    return protections;
+                }
+                catch { }
+            }
+
+            return null;
+        }
+    }
+}

BurnOutSharp/FileType/InstallShieldCAB.cs

@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Concurrent;
-using System.Collections.Generic;
 using System.IO;
 using System.Text.RegularExpressions;
 using UnshieldSharp.Cabinet;

BurnOutSharp/Scanner.cs

@@ -320,6 +320,14 @@ private ConcurrentDictionary<string, ConcurrentQueue<string>> GetInternalProtect
                         Utilities.AppendToDictionary(protections, subProtections);
                     }
 
+                    // InstallShield Archive V3 (Z)
+                    if (file != null && new InstallShieldArchiveV3().ShouldScan(magic))
+                    {
+                        var subProtections = new InstallShieldArchiveV3().Scan(this, file);
+                        Utilities.PrependToKeys(subProtections, file);
+                        Utilities.AppendToDictionary(protections, subProtections);
+                    }
+
                     // InstallShield Cabinet
                     if (file != null && new InstallShieldCAB().ShouldScan(magic))
                     {