c9b6a6c01e
- repro builds to use fixed uid=1000 inside the container
- in case the file permissions leak into the binaries, they are still reproducible
- chown 1000:1000 fresh_clone
- repro builds to create fresh_clone dir outside git clone
- otherwise the local dev build would still interact with the fresh_clone dir
- due to e.g. recursive "find -exec touch",
- and even the "docker build" cmd itself would try to stat/read it
- see https://github.com/docker/for-linux/issues/380
- and "rm -rf fresh_clone" needs sudo if the host uid is not 1000
- this way the local dev build does not need sudo
to recap:
- local dev builds use the host userid inside the container, directly operate on the project dir
- does not need sudo
- repro builds create a fresh git clone, chown it to 1000, and use userid=1000 inside the container
- if the host userid is 1000, does not need sudo
- otherwise, needs sudo
closes https://github.com/spesmilo/electrum/issues/8261
Windows binaries
✓ These binaries should be reproducible, meaning you should be able to generate binaries that match the official releases.
This assumes an Ubuntu (x86_64) host, but it should not be too hard to adapt to another similar system.
-
Install Docker
See
contrib/docker_notes.md.Note: older versions of Docker might not work well (see #6971). If having problems, try to upgrade to at least
docker 20.10. -
Build Windows binaries
$ ./build.shIf you want reproducibility, try instead e.g.:
$ ELECBUILD_COMMIT=HEAD ELECBUILD_NOCACHE=1 ./build.sh -
The generated binaries are in
./contrib/build-wine/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 make_win.sh |
|
Sign .exe with ./sign.sh |
|
| Upload signed files to download server | |
Build .exe files using make_win.sh |
|
Compare files using unsign.sh |
|
Sign .exe file using gpg -b |
| Signer and verifiers: |
|---|
Upload signatures to 'electrum-signatures' repo, as $version/$filename.$builder.asc |
Verify Integrity of signed binary
Every user can verify that the official binary was created from the source code in this repository. To do so, the Authenticode signature needs to be stripped since the signature is not reproducible.
This procedure removes the differences between the signed and unsigned binary:
- Remove the signature from the signed binary using osslsigncode or signtool.
- Set the COFF image checksum for the signed binary to 0x0. This is necessary because pyinstaller doesn't generate a checksum.
- Append null bytes to the unsigned binary until the byte count is a multiple of 8.
The script unsign.sh performs these steps.
FAQ
How to investigate diff between binaries if reproducibility fails?
pyi-archive_viewer is needed, for that run $ pip install pyinstaller.
As a first pass overview, run:
pyi-archive_viewer -l electrum-*.exe1 > f1
pyi-archive_viewer -l electrum-*.exe2 > f2
diff f1 f2 > d
cat d
Then investigate manually:
$ pyi-archive_viewer electrum-*.exe1
? help