├── .gitattributes ├── HexAndReplace.csproj ├── .github └── FUNDING.yml ├── LICENSE ├── README.md ├── HexAndReplace.sln ├── Publish.ps1 ├── BinaryReplacer.cs ├── HexAndReplaceApp.cs └── .gitignore /.gitattributes: -------------------------------------------------------------------------------- 1 | # Auto detect text files and perform LF normalization 2 | * text=auto 3 | -------------------------------------------------------------------------------- /HexAndReplace.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net8.0 6 | true 7 | Link 8 | 2.0.0 9 | 10 | 11 | 12 | -------------------------------------------------------------------------------- /.github/FUNDING.yml: -------------------------------------------------------------------------------- 1 | # These are supported funding model platforms 2 | 3 | github: jjxtra 4 | patreon: # Replace with a single Patreon username 5 | open_collective: # Replace with a single Open Collective username 6 | ko_fi: # Replace with a single Ko-fi username 7 | tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel 8 | community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry 9 | liberapay: # Replace with a single Liberapay username 10 | issuehunt: # Replace with a single IssueHunt username 11 | otechie: # Replace with a single Otechie username 12 | lfx_crowdfunding: # Replace with a single LFX Crowdfunding project-name e.g., cloud-foundry 13 | custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2'] 14 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2019 Jeff Johnson 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | ## Hex and Replace 2 | 3 | HexAndReplace allows finding a hex sequence in any file and replacing with another. The replacement hex must be identical in length to the find hex. Great if you don't want to install a hex-editor for concerns of malware. 4 | 5 | The file will be replaced as is, so make a backup first if you are not sure. 6 | 7 | As of 2.0.0 release, files of unlimited length are supported. 8 | 9 | Usage: 10 | 11 | ``` 12 | HexAndReplace 13 | 14 | General Example: 15 | HexAndReplace mybinaryfile.bin 0xFFEEDDCC 0xAAEEDDCC 16 | 17 | // Unity 2019.3 dark mode 18 | HexAndReplace "C:\Program Files\Unity\Hub\Editor\2019.3.6f1\Editor\Unity.exe" "75 15 33 C0 EB 13 90" "74 15 33 C0 EB 13 90" 19 | 20 | // Unity 2018.4 dark mode 21 | HexAndReplace "C:\Program Files\Unity\Hub\Editor\2018.4.6f1\Editor\Unity.exe" "74 04 33 C0 EB 02 8B 03 48 8B 4C" "75 04 33 C0 EB 02 8B 03 48 8B 4C" 22 | 23 | // Unity 2017.4 dark mode 24 | HexAndReplace "C:\Program Files\Unity\Hub\Editor\2017.4.38f1\Editor\Unity.exe" "75 08 33 C0 48 83 C4 20 5B C3 8B 03 48 83 C4 20 5B C3" "74 08 33 C0 48 83 C4 20 5B C3 8B 03 48 83 C4 20 5B C3" 25 | ``` 26 | 27 | Enjoy! 28 | 29 | -- Jeff 30 | -------------------------------------------------------------------------------- /HexAndReplace.sln: -------------------------------------------------------------------------------- 1 | 2 | Microsoft Visual Studio Solution File, Format Version 12.00 3 | # Visual Studio 15 4 | VisualStudioVersion = 15.0.28307.1082 5 | MinimumVisualStudioVersion = 10.0.40219.1 6 | Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "HexAndReplace", "HexAndReplace.csproj", "{89CAF028-5895-428F-AEB0-BF260512C05F}" 7 | EndProject 8 | Global 9 | GlobalSection(SolutionConfigurationPlatforms) = preSolution 10 | Debug|Any CPU = Debug|Any CPU 11 | Release|Any CPU = Release|Any CPU 12 | EndGlobalSection 13 | GlobalSection(ProjectConfigurationPlatforms) = postSolution 14 | {89CAF028-5895-428F-AEB0-BF260512C05F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU 15 | {89CAF028-5895-428F-AEB0-BF260512C05F}.Debug|Any CPU.Build.0 = Debug|Any CPU 16 | {89CAF028-5895-428F-AEB0-BF260512C05F}.Release|Any CPU.ActiveCfg = Release|Any CPU 17 | {89CAF028-5895-428F-AEB0-BF260512C05F}.Release|Any CPU.Build.0 = Release|Any CPU 18 | EndGlobalSection 19 | GlobalSection(SolutionProperties) = preSolution 20 | HideSolutionNode = FALSE 21 | EndGlobalSection 22 | GlobalSection(ExtensibilityGlobals) = postSolution 23 | SolutionGuid = {C2B80A20-B186-4C1D-A660-D31EE46EAD9C} 24 | EndGlobalSection 25 | EndGlobal 26 | -------------------------------------------------------------------------------- /Publish.ps1: -------------------------------------------------------------------------------- 1 | # Define the project path 2 | $projectPath = "./HexAndReplace.csproj" 3 | 4 | # Publish for win-x64 with AOT and single file compression 5 | dotnet publish $projectPath ` 6 | -c Release ` 7 | -r win-x64 ` 8 | /p:PublishAot=true ` 9 | /p:SelfContained=true ` 10 | -o "./bin/release/net8.0/publish/win-x64" 11 | 12 | # delete pdb files 13 | Remove-Item -Path "./bin/release/net8.0/publish/win-x64/*.pdb" 14 | 15 | # zip the output exe with max compression 16 | Compress-Archive -Path "./bin/release/net8.0/publish/win-x64/HexAndReplace.exe" -DestinationPath "./bin/release/net8.0/publish/win-x64/HexAndReplace_Windows_x64.zip" -CompressionLevel Optimal -Force 17 | 18 | # Publish for linux-x64 with single file compression 19 | dotnet publish $projectPath ` 20 | -c Release ` 21 | -r linux-x64 ` 22 | /p:PublishSingleFile=true ` 23 | /p:SelfContained=true ` 24 | -o "./bin/release/net8.0/publish/linux-x64" 25 | 26 | # delete pdb files 27 | Remove-Item -Path "./bin/release/net8.0/publish/linux-x64/*.pdb" 28 | 29 | # zip the output exe with max compression 30 | Compress-Archive -Path "./bin/release/net8.0/publish/linux-x64/HexAndReplace" -DestinationPath "./bin/release/net8.0/publish/linux-x64/HexAndReplace_Linux_x64.zip" -CompressionLevel Optimal -Force 31 | 32 | Write-Host "Publishing completed." -------------------------------------------------------------------------------- /BinaryReplacer.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.IO; 3 | 4 | namespace HexAndReplace; 5 | 6 | /// 7 | /// Find/replace binary data in a seekable stream 8 | /// 9 | /// 10 | /// Constructor 11 | /// 12 | /// Stream 13 | /// Buffer size 14 | public sealed class BinaryReplacer(Stream stream, int bufferSize = ushort.MaxValue) : IDisposable 15 | { 16 | private readonly Stream stream = stream; 17 | private readonly int bufferSize = bufferSize < 2 ? throw new ArgumentOutOfRangeException(nameof(bufferSize)) : bufferSize; 18 | 19 | /// 20 | public void Dispose() 21 | { 22 | stream.Dispose(); 23 | 24 | } 25 | /// 26 | /// Find and replace binary data in a stream 27 | /// 28 | /// Find 29 | /// Replace 30 | /// First index of replaced data, or -1 if find is not found 31 | /// Find and replace are not the same length 32 | public long Replace(byte[] find, byte[] replace) 33 | { 34 | if (find.Length != replace.Length) 35 | { 36 | throw new ArgumentException("Find and replace hex must be same length"); 37 | } 38 | else if (find.Length > bufferSize) 39 | { 40 | throw new ArgumentException("Find size " + find.Length + " is too large for buffer size " + bufferSize); 41 | } 42 | long position = 0; 43 | long foundPosition = -1; 44 | byte[] buffer = new byte[bufferSize + find.Length - 1]; 45 | int bytesRead; 46 | stream.Position = 0; 47 | while ((bytesRead = stream.Read(buffer, 0, buffer.Length)) > 0) 48 | { 49 | for (int i = 0; i <= bytesRead - find.Length; i++) 50 | { 51 | for (int j = 0; j < find.Length; j++) 52 | { 53 | if (buffer[i + j] != find[j]) break; 54 | else if (j == find.Length - 1) 55 | { 56 | stream.Seek(position + i, SeekOrigin.Begin); 57 | stream.Write(replace, 0, replace.Length); 58 | if (foundPosition == -1) 59 | { 60 | foundPosition = position + i; 61 | } 62 | break; 63 | } 64 | } 65 | } 66 | position += bytesRead - find.Length + 1; 67 | if (position > stream.Length - find.Length) 68 | { 69 | break; 70 | } 71 | stream.Seek(position, SeekOrigin.Begin); 72 | } 73 | return foundPosition; 74 | } 75 | } 76 | -------------------------------------------------------------------------------- /HexAndReplaceApp.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Globalization; 3 | using System.IO; 4 | using System.Linq; 5 | using System.Runtime.CompilerServices; 6 | using System.Text.RegularExpressions; 7 | 8 | namespace HexAndReplace 9 | { 10 | /// 11 | /// App 12 | /// 13 | public static class HexAndReplaceApp 14 | { 15 | /// 16 | /// Main 17 | /// 18 | /// Args 19 | public static int Main(string[] args) 20 | { 21 | if (args.Length != 0 && args[0] == "test") 22 | { 23 | DoTests(); 24 | return -2; 25 | } 26 | 27 | if (args.Length < 3) 28 | { 29 | Console.WriteLine("Replace first instance of one hex sequence with another. Usage: ."); 30 | return -1; 31 | } 32 | byte[] find = ConvertHexStringToByteArray(Regex.Replace(args[1], "0x|[ ,]", string.Empty).Normalize().Trim()); 33 | byte[] replace = ConvertHexStringToByteArray(Regex.Replace(args[2], "0x|[ ,]", string.Empty).Normalize().Trim()); 34 | using BinaryReplacer replacer = new(File.Open(args[0], FileMode.Open)); 35 | long pos = replacer.Replace(find, replace); 36 | 37 | if (pos >= 0) 38 | { 39 | Console.WriteLine($"Pattern found and replaced at position {pos}"); 40 | return 0; 41 | } 42 | Console.WriteLine("Pattern not found"); 43 | return -1; 44 | } 45 | 46 | private static byte[] ConvertHexStringToByteArray(string hexString) 47 | { 48 | if (hexString.Length % 2 != 0) 49 | { 50 | throw new ArgumentException(String.Format(CultureInfo.InvariantCulture, "The binary key cannot have an odd number of digits: {0}", hexString)); 51 | } 52 | 53 | byte[] data = new byte[hexString.Length / 2]; 54 | for (int index = 0; index < data.Length; index++) 55 | { 56 | string byteValue = hexString.Substring(index * 2, 2); 57 | data[index] = byte.Parse(byteValue, NumberStyles.HexNumber, CultureInfo.InvariantCulture); 58 | } 59 | 60 | return data; 61 | } 62 | 63 | private static void DoTests() 64 | { 65 | Console.WriteLine("Running tests..."); 66 | 67 | static void DoTest(int bufferSize) 68 | { 69 | MemoryStream ms = new(); 70 | ms.Write([0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x03, 0x04, 0x07, 0x08]); 71 | ms.Seek(0, SeekOrigin.Begin); 72 | using BinaryReplacer replacer = new(ms, bufferSize); 73 | long pos = replacer.Replace([0x03, 0x04], [0x0A, 0x0B]); 74 | if (pos != 2) 75 | { 76 | throw new ApplicationException("Test failed"); 77 | } 78 | pos = replacer.Replace([0x03, 0x04], [0x0A, 0x0B]); 79 | if (pos != -1) 80 | { 81 | throw new ApplicationException("Test failed"); 82 | } 83 | pos = replacer.Replace([0x07, 0x08], [0x0C, 0x0D]); 84 | if (pos != 8) 85 | { 86 | throw new ApplicationException("Test failed"); 87 | } 88 | pos = replacer.Replace([0x07, 0x08], [0x0C, 0x0D]); 89 | if (pos != -1) 90 | { 91 | throw new ApplicationException("Test failed"); 92 | } 93 | 94 | var finalSequence = new byte[] { 0x01, 0x02, 0x0A, 0x0B, 0x05, 0x06, 0x0A, 0x0B, 0x0C, 0x0D }; 95 | if (!ms.ToArray().SequenceEqual(finalSequence)) 96 | { 97 | throw new ApplicationException("Test failed"); 98 | } 99 | } 100 | for (var i = 2; i <= 16; i++) 101 | { 102 | DoTest(i); 103 | } 104 | 105 | Console.WriteLine("All passed"); 106 | } 107 | } 108 | } -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | ## Ignore Visual Studio temporary files, build results, and 2 | ## files generated by popular Visual Studio add-ons. 3 | ## 4 | ## Get latest from https://github.com/github/gitignore/blob/master/VisualStudio.gitignore 5 | 6 | # User-specific files 7 | *.rsuser 8 | *.suo 9 | *.user 10 | *.userosscache 11 | *.sln.docstates 12 | launchSettings.json 13 | 14 | # User-specific files (MonoDevelop/Xamarin Studio) 15 | *.userprefs 16 | 17 | # Mono auto generated files 18 | mono_crash.* 19 | 20 | # Build results 21 | [Dd]ebug/ 22 | [Dd]ebugPublic/ 23 | [Rr]elease/ 24 | [Rr]eleases/ 25 | x64/ 26 | x86/ 27 | [Aa][Rr][Mm]/ 28 | [Aa][Rr][Mm]64/ 29 | bld/ 30 | [Bb]in/ 31 | [Oo]bj/ 32 | [Ll]og/ 33 | [Ll]ogs/ 34 | 35 | # Visual Studio 2015/2017 cache/options directory 36 | .vs/ 37 | # Uncomment if you have tasks that create the project's static files in wwwroot 38 | #wwwroot/ 39 | 40 | # Visual Studio 2017 auto generated files 41 | Generated\ Files/ 42 | 43 | # MSTest test Results 44 | [Tt]est[Rr]esult*/ 45 | [Bb]uild[Ll]og.* 46 | 47 | # NUnit 48 | *.VisualState.xml 49 | TestResult.xml 50 | nunit-*.xml 51 | 52 | # Build Results of an ATL Project 53 | [Dd]ebugPS/ 54 | [Rr]eleasePS/ 55 | dlldata.c 56 | 57 | # Benchmark Results 58 | BenchmarkDotNet.Artifacts/ 59 | 60 | # .NET Core 61 | project.lock.json 62 | project.fragment.lock.json 63 | artifacts/ 64 | 65 | # StyleCop 66 | StyleCopReport.xml 67 | 68 | # Files built by Visual Studio 69 | *_i.c 70 | *_p.c 71 | *_h.h 72 | *.ilk 73 | *.meta 74 | *.obj 75 | *.iobj 76 | *.pch 77 | *.pdb 78 | *.ipdb 79 | *.pgc 80 | *.pgd 81 | *.rsp 82 | *.sbr 83 | *.tlb 84 | *.tli 85 | *.tlh 86 | *.tmp 87 | *.tmp_proj 88 | *_wpftmp.csproj 89 | *.log 90 | *.vspscc 91 | *.vssscc 92 | .builds 93 | *.pidb 94 | *.svclog 95 | *.scc 96 | 97 | # Chutzpah Test files 98 | _Chutzpah* 99 | 100 | # Visual C++ cache files 101 | ipch/ 102 | *.aps 103 | *.ncb 104 | *.opendb 105 | *.opensdf 106 | *.sdf 107 | *.cachefile 108 | *.VC.db 109 | *.VC.VC.opendb 110 | 111 | # Visual Studio profiler 112 | *.psess 113 | *.vsp 114 | *.vspx 115 | *.sap 116 | 117 | # Visual Studio Trace Files 118 | *.e2e 119 | 120 | # TFS 2012 Local Workspace 121 | $tf/ 122 | 123 | # Guidance Automation Toolkit 124 | *.gpState 125 | 126 | # ReSharper is a .NET coding add-in 127 | _ReSharper*/ 128 | *.[Rr]e[Ss]harper 129 | *.DotSettings.user 130 | 131 | # JustCode is a .NET coding add-in 132 | .JustCode 133 | 134 | # TeamCity is a build add-in 135 | _TeamCity* 136 | 137 | # DotCover is a Code Coverage Tool 138 | *.dotCover 139 | 140 | # AxoCover is a Code Coverage Tool 141 | .axoCover/* 142 | !.axoCover/settings.json 143 | 144 | # Visual Studio code coverage results 145 | *.coverage 146 | *.coveragexml 147 | 148 | # NCrunch 149 | _NCrunch_* 150 | .*crunch*.local.xml 151 | nCrunchTemp_* 152 | 153 | # MightyMoose 154 | *.mm.* 155 | AutoTest.Net/ 156 | 157 | # Web workbench (sass) 158 | .sass-cache/ 159 | 160 | # Installshield output folder 161 | [Ee]xpress/ 162 | 163 | # DocProject is a documentation generator add-in 164 | DocProject/buildhelp/ 165 | DocProject/Help/*.HxT 166 | DocProject/Help/*.HxC 167 | DocProject/Help/*.hhc 168 | DocProject/Help/*.hhk 169 | DocProject/Help/*.hhp 170 | DocProject/Help/Html2 171 | DocProject/Help/html 172 | 173 | # Click-Once directory 174 | publish/ 175 | 176 | # Publish Web Output 177 | *.[Pp]ublish.xml 178 | *.azurePubxml 179 | # Note: Comment the next line if you want to checkin your web deploy settings, 180 | # but database connection strings (with potential passwords) will be unencrypted 181 | *.pubxml 182 | *.publishproj 183 | 184 | # Microsoft Azure Web App publish settings. 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