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Windows Binary Builds

These scripts can be used for cross-compilation of Windows Electrum executables from Linux/Wine. Produced binaries are deterministic, so you should be able to generate binaries that match the official releases.

Usage:

  1. Install the following dependencies:
  • dirmngr
  • gpg
  • 7Zip
  • Wine (>= v2)
  • (and, for building libsecp256k1)
    • mingw-w64
    • autotools-dev
    • autoconf
    • libtool

For example:

$ sudo apt-get install wine-development dirmngr gnupg2 p7zip-full
$ sudo apt-get install mingw-w64 autotools-dev autoconf libtool

The binaries are also built by Travis CI, so if you are having problems, that script might help.

  1. Make sure /opt is writable by the current user.
  2. Run build.sh.
  3. The generated binaries are in ./dist.

Code Signing

Electrum Windows builds are signed with a Microsoft Authenticode™ code signing certificate in addition to the GPG-based signatures.

The advantage of using Authenticode is that Electrum users won't receive a Windows SmartScreen warning when starting it.

The release signing procedure involves a signer (the holder of the certificate/key) and one or multiple trusted verifiers:

Signer Verifier
Build .exe files using build.sh
Build .exe files using build.sh
Sign .exe files using gpg -b
Send signatures to signer
Place signatures as $filename.$builder.asc in ./dist
Run ./sign.sh

sign.sh will check if the signatures match the signer's files. This ensures that the signer's build environment is not compromised and that the binaries can be reproduced by anyone.