build.sh

@@ -11,7 +11,8 @@ echo "Building BitBetter for BitWarden version $BW_VERSION"
 
 # Prepare Bitwarden repository
 rm -rf $DIR/server
-git clone --branch "v${BW_VERSION}" --depth 1 https://github.com/bitwarden/server.git $DIR/server
+git clone https://github.com/bitwarden/server.git
+git -C $DIR/server checkout tags/v${BW_VERSION}
 old_thumbprint=$(openssl x509 -fingerprint -noout -in $DIR/server/src/Core/licensing.cer | cut -d= -f2 | tr -d ':')
 new_thumbprint=$(openssl x509 -fingerprint -noout -in $DIR/.keys/cert.cert | cut -d= -f2 | tr -d ':')
 cp $DIR/.keys/cert.cert $DIR/server/src/Core/licensing.cer

src/bitBetter/Dockerfile

@@ -0,0 +1,11 @@
+ARG BITWARDEN_TAG
+FROM ${BITWARDEN_TAG}
+
+COPY bin/Release/net8.0/publish/* /bitBetter/
+COPY ./.keys/cert.cert /newLicensing.cer
+
+RUN set -e; set -x; \
+    dotnet /bitBetter/bitBetter.dll && \
+    mv /app/Core.dll /app/Core.orig.dll && \
+    mv /app/modified.dll /app/Core.dll && \
+    rm -rf /bitBetter && rm -rf /newLicensing.cer

src/bitBetter/Program.cs

@@ -0,0 +1,93 @@
+using System;
+using System.IO;
+using System.Linq;
+using System.Security.Cryptography.X509Certificates;
+using Mono.Cecil;
+using Mono.Cecil.Cil;
+using Mono.Cecil.Rocks;
+
+namespace bitwardenSelfLicensor
+{
+    class Program
+    {
+        static int Main(string[] args)
+        {
+            string cerFile;
+            string corePath;
+
+            if(args.Length >= 2) {
+                cerFile = args[0];
+                corePath = args[1];
+            } else if (args.Length == 1) {
+                cerFile = args[0];
+                corePath = "/app/Core.dll";
+            }
+            else {
+                cerFile = "/newLicensing.cer";
+                corePath = "/app/Core.dll";
+            }
+
+
+            var module =  ModuleDefinition.ReadModule(new MemoryStream(File.ReadAllBytes(corePath)));
+            var cert = File.ReadAllBytes(cerFile);
+
+            var x = module.Resources.OfType<EmbeddedResource>()
+                                    .Where(r => r.Name.Equals("Bit.Core.licensing.cer"))
+                                    .First();
+
+            Console.WriteLine(x.Name);
+
+            var e = new EmbeddedResource("Bit.Core.licensing.cer", x.Attributes, cert);
+
+            module.Resources.Add(e);
+            module.Resources.Remove(x);
+
+            var services = module.Types.Where(t => t.Namespace == "Bit.Core.Services");
+            
+
+            var type = services.First(t => t.Name == "LicensingService");
+
+            var licensingType =  type.Resolve();
+
+            var existingCert = new X509Certificate2(x.GetResourceData());
+
+            Console.WriteLine($"Existing Cert Thumbprint: {existingCert.Thumbprint}");
+            X509Certificate2 certificate = new X509Certificate2(cert);
+
+            Console.WriteLine($"New Cert Thumbprint: {certificate.Thumbprint}");
+
+            var ctor = licensingType.GetConstructors().Single();
+
+
+            var rewriter = ctor.Body.GetILProcessor();
+
+            var instToReplace = 
+                ctor.Body.Instructions.Where(i => i.OpCode == OpCodes.Ldstr
+                    && string.Equals((string)i.Operand, existingCert.Thumbprint, StringComparison.InvariantCultureIgnoreCase))
+                .FirstOrDefault();
+
+            if(instToReplace != null) {
+                rewriter.Replace(instToReplace, Instruction.Create(OpCodes.Ldstr, certificate.Thumbprint));
+            }
+            else {
+                Console.WriteLine("Cant find inst");
+            }
+
+            // foreach (var inst in ctor.Body.Instructions)
+            // {
+            //     Console.Write(inst.OpCode.Name + " " + inst.Operand?.GetType() + " = ");
+            //     if(inst.OpCode.FlowControl == FlowControl.Call) {
+            //         Console.WriteLine(inst.Operand);
+            //     }
+            //     else if(inst.OpCode == OpCodes.Ldstr) {
+            //         Console.WriteLine(inst.Operand);
+            //     }
+            //     else {Console.WriteLine();}
+            // }
+
+            module.Write("modified.dll");
+
+            return 0;
+        }
+    }
+}

src/bitBetter/bitBetter.csproj

@@ -0,0 +1,12 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Mono.Cecil" Version="0.11.2" />
+  </ItemGroup>
+
+</Project>

src/bitBetter/build.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+set -e
+set -x
+
+dotnet restore
+dotnet publish