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README-Windows.md

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Instructions for Building Chromium on Windows

1. Obtain the Chromium Source Code

Please read Google's instructions carefully, then complete every step before Setting up the build.

The rest of the instructions will use %CHROMIUM_ROOT% to refer to the root directory of the Chromium source code.
You may set CHROMIUM_ROOT variable by running set CHROMIUM_ROOT=/path/to/the/Chromium/source in Command Prompt.

In Command Prompt, run following commands:

cd %CHROMIUM_ROOT%
git checkout tags/131.0.6769.0
gclient sync

2. Switch to the OQS-BoringSSL

In Command Prompt, run following commands:

cd %CHROMIUM_ROOT%/third_party/boringssl/src
git remote add oqs-bssl https://github.com/open-quantum-safe/boringssl
git fetch oqs-bssl
git checkout -b oqs-bssl-master 0599bb559d3be76a98f0940d494411b6a8e0b18e

3. Clone and Build liboqs

Choose a directory to store the liboqs source code and use the cd command to move to that directory. We will use msbuild instead of ninja to build liboqs.
Start x64 Native Tools Command Prompt for VS 2022 (usually it's in C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Visual Studio 2022\Visual Studio Tools\VC) and run following commands:

git clone https://github.com/open-quantum-safe/liboqs.git && cd liboqs && git checkout 9aa2e1481cd0c242658ec8e92776741feabec163
mkdir build && cd build
cmake .. -DCMAKE_INSTALL_PREFIX=%CHROMIUM_ROOT%/third_party/boringssl/src/oqs -DOQS_USE_OPENSSL=OFF -DCMAKE_BUILD_TYPE=Release
msbuild ALL_BUILD.vcxproj
msbuild INSTALL.vcxproj

4. Enable Quantum-Safe Crypto

Download the oqs-Windows.patch and save it at %CHROMIUM_ROOT%, then apply the patch by running

git apply oqs-Windows.patch

5. Build

In Command Prompt, run following commands:

cd %CHROMIUM_ROOT%
gn args out/Default

Then append following lines to the configuration file opened in editor:

is_debug = false
symbol_level = 0
enable_nacl = false
blink_symbol_level = 0
target_cpu = "x64"
target_os = "win"

Save and close the configuration file. Last, run autoninja -C out/Default chrome in Command Prompt.
If the build completes successfully, it will create chrome.exe in %CHROMIUM_ROOT%/out/Default.

6. Miscellaneous

  • BIKE key exchange is not supported.
  • This guide was initially published on October 10, 2024, and may be outdated.