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punktfunk/.gitea/workflows/windows.yml
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enricobuehler e707a962b6 fix(security): anti-replay, 0600 client key, open redirect, supply-chain
Address findings from a repo security review:

- core: add a sliding-window anti-replay filter over the AEAD-authenticated
  sequence in Session (poll_input/poll_frame), closing the input-replay gap the
  data plane previously left to the LAN/VPN trust assumption. 4096-deep window,
  unit-tested; the encrypted loopback suite confirms no false drops.
- clients: write the mTLS client private key 0600 and lock the config dir 0700
  on Unix (it was world-readable at the umask default), re-locking existing
  stores on load. pf-client-core::trust plus the probe's own identity writer.
  Windows keeps the %APPDATA% ACL; Android/Apple already wrap the key.
- web: fix a post-login open redirect — resolve `next` via URL and require it to
  stay same-origin, rejecting `/\evil.com` and tab/encoding variants the old
  `!startsWith("//")` guard missed. Also fixes the dead safeNextPath helper.
- ci: SHA-256-pin the BtbN FFmpeg DLLs bundled into the signed Windows installer
  (were fetched from the rolling `latest` tag unverified); fails closed on a
  re-roll, matching the VB-CABLE gate.
- ci: fail-open fork-guard on the Windows/Apple host-mode PR build jobs that
  share runner labels with the signing jobs. Definitive fix stays server-side
  (Gitea outside-collaborator approval / isolated PR runners) — see the notes.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-07-10 10:04:23 +02:00

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YAML

# Windows client CI — runs on a self-hosted windows-amd64 runner (host mode; the generic runner +
# toolchain come from unom/infra's windows-runner/; punktfunk's own extras - FFmpeg,
# Vulkan-Headers, WDK, Inno Setup, the ARM64 rustup target - self-provision via the "Ensure
# Windows toolchain" step below, a fast no-op once already present, so any runner with that label
# works with no manual dispatch step first). Build + clippy + fmt + test BOTH client binaries:
# the WinUI 3 shell (windows-reactor + WASAPI + SDL3) and the punktfunk-session Vulkan client
# (pf-presenter/pf-client-core/pf-console-ui/pf-ffvk — every stream runs in it, spawned by the
# shell). ARM64 note: rust-skia publishes no aarch64-pc-windows-msvc prebuilt binaries, so the
# session builds --no-default-features there (no Skia console UI; streaming is unaffected) —
# flip when skia-binaries adds the target.
#
# Two architectures from ONE x64 runner: x86_64-pc-windows-msvc natively and
# aarch64-pc-windows-msvc by cross-compiling. The x64 MSVC toolset ships an ARM64 cross compiler
# (VC\Tools\MSVC\<ver>\bin\Hostx64\arm64\cl.exe) and aarch64-pc-windows-msvc is a tier-2 Rust
# target with host tools, so no ARM64 runner is needed — the cc/cmake crates pick the ARM64
# compiler from the target triple (SDL3 + libopus build-from-source cross-compile fine). The one
# arch-specific external dep is FFmpeg's import libs: the runner keeps an x64 tree at
# C:\Users\Public\ffmpeg and an ARM64 tree at C:\Users\Public\ffmpeg-arm64 (both FFmpeg 7.x /
# avcodec-61); the matrix points FFMPEG_DIR at the right one. aarch64 can't *run* on the x64 host,
# so fmt + test run only for x64.
#
# The MSVC/WinUI/FFmpeg toolchain (cargo/rustup on ASCII paths, NASM, CMake, LLVM, the x64 FFmpeg,
# CARGO_HOME, CMAKE_POLICY_VERSION_MINIMUM, …) is baked into the runner's daemon env. Per-checkout
# / per-arch vars are set in a step:
# - CARGO_WORKSPACE_DIR windows-reactor's build.rs unwraps it + stages the Win App SDK
# NuGets/winmd under it (from GITHUB_WORKSPACE).
# - CARGO_TARGET_DIR=C:\t… the runner's host workdir is buried deep under
# C:\Windows\System32\config\systemprofile\.cache\act\<hash>\hostexecutor\,
# so the default target\ path blows past Windows' MAX_PATH (260) inside the
# CMake-from-source builds (audiopus_sys / SDL3) — MSBuild's tracker then
# can't create its .tlog (DirectoryNotFoundException -> MSB6003). A short
# root keeps every nested path well under the limit (per-arch so the two
# matrix legs don't share a target dir).
# - FFMPEG_DIR per-arch FFmpeg import libs (x64 vs arm64 tree).
#
# Steps use `shell: pwsh` (PowerShell 7) deliberately: Windows PowerShell 5.1's
# `Out-File -Encoding utf8` prepends a UTF-8 BOM that corrupts the first GITHUB_ENV line (the
# CARGO_WORKSPACE_DIR var silently never gets set -> reactor build.rs panics). pwsh writes no BOM.
# The runner's daemon wrapper puts C:\Program Files\PowerShell\7 on PATH so the job finds pwsh.
name: windows
on:
push:
branches: [main]
paths:
- 'clients/windows/**'
- 'clients/session/**'
- 'crates/punktfunk-core/**'
- 'crates/pf-client-core/**'
- 'crates/pf-presenter/**'
- 'crates/pf-console-ui/**'
- 'crates/pf-ffvk/**'
- 'Cargo.lock'
- 'Cargo.toml'
- '.gitea/workflows/windows.yml'
pull_request:
paths:
- 'clients/windows/**'
- 'clients/session/**'
- 'crates/punktfunk-core/**'
- 'crates/pf-client-core/**'
- 'crates/pf-presenter/**'
- 'crates/pf-console-ui/**'
- 'crates/pf-ffvk/**'
- 'Cargo.lock'
- 'Cargo.toml'
- '.gitea/workflows/windows.yml'
workflow_dispatch:
jobs:
# SECURITY: this job builds PULL-REQUEST code (attacker-controllable build.rs / cargo build) on the
# host-mode, persistent `windows-amd64` runner that the release-SIGNING jobs (windows-host.yml /
# windows-msix.yml, which decrypt MSIX_CERT_PFX_B64 + REGISTRY_TOKEN to disk) also run on. Untrusted
# PR code could therefore persist on that machine or harvest signing material a later job exposes.
# The DEFINITIVE fix is operational and lives outside this file: enable Gitea's "require approval to
# run workflows for PRs from outside collaborators/forks", and/or route PR CI to isolated ephemeral
# runners. The `if:` below is only a backstop — it skips fork PRs where Gitea reports the fork flag,
# and FAILS OPEN (still runs) for same-repo PRs and on Gitea versions that don't populate it, so it
# never blocks internal PR CI.
build:
runs-on: windows-amd64
if: >-
github.event_name != 'pull_request' ||
github.event.pull_request.head.repo.fork != true
timeout-minutes: 90
strategy:
fail-fast: false
matrix:
target: [x86_64-pc-windows-msvc, aarch64-pc-windows-msvc]
steps:
- uses: actions/checkout@v4
- name: Ensure Windows toolchain (WDK, FFmpeg, Inno Setup, ARM64 target)
shell: pwsh
run: ./scripts/ci/ensure-windows-toolchain.ps1
- name: Configure + toolchain versions
shell: pwsh
run: |
"CARGO_WORKSPACE_DIR=$env:GITHUB_WORKSPACE" | Out-File -FilePath $env:GITHUB_ENV -Append -Encoding utf8
# Per-arch short target root (dodges MAX_PATH; keeps the two legs from sharing target\).
$td = if ('${{ matrix.target }}' -eq 'aarch64-pc-windows-msvc') { 'C:\t-a64' } else { 'C:\t' }
"CARGO_TARGET_DIR=$td" | Out-File -FilePath $env:GITHUB_ENV -Append -Encoding utf8
# Per-arch FFmpeg import libs (provision-windows-punktfunk-extras.ps1 fetches both).
$ff = if ('${{ matrix.target }}' -eq 'aarch64-pc-windows-msvc') { 'C:\Users\Public\ffmpeg-arm64' } else { 'C:\Users\Public\ffmpeg' }
"FFMPEG_DIR=$ff" | Out-File -FilePath $env:GITHUB_ENV -Append -Encoding utf8
# pf-ffvk's bindgen needs Vulkan headers (arch-independent; provisioned alongside FFmpeg).
"PF_FFVK_VULKAN_INCLUDE=C:\Users\Public\vulkan-headers\include" | Out-File -FilePath $env:GITHUB_ENV -Append -Encoding utf8
# $ff\bin on PATH too (not just FFMPEG_DIR, which only satisfies the linker): the test
# binary needs the actual DLLs to load at runtime. Set here rather than relying on the
# daemon's own env (project-env.ps1) - on a freshly cloned/registered runner the daemon
# starts before this job's "Ensure Windows toolchain" step ever writes that file, so its
# PATH doesn't include this yet on a first run (confirmed live: STATUS_DLL_NOT_FOUND).
"$ff\bin" | Out-File -FilePath $env:GITHUB_PATH -Append -Encoding utf8
rustup target add ${{ matrix.target }}
rustc --version
cargo --version
Write-Output "target ${{ matrix.target }} target-dir $td ffmpeg $ff"
# Both client binaries. ARM64: no skia-binaries prebuilt for the target, so the session
# drops its `ui` feature there (pf-console-ui excluded; --no-default-features is a no-op
# for the shell, which has no features).
- name: Build
shell: pwsh
run: |
$sf = @(); if ('${{ matrix.target }}' -eq 'aarch64-pc-windows-msvc') { $sf = @('--no-default-features') }
cargo build -p punktfunk-client-windows -p punktfunk-client-session @sf --target ${{ matrix.target }}
- name: Clippy (-D warnings)
shell: pwsh
run: |
$pkgs = @('-p','punktfunk-client-windows','-p','punktfunk-client-session','-p','pf-client-core','-p','pf-presenter','-p','pf-ffvk')
$sf = @()
if ('${{ matrix.target }}' -eq 'aarch64-pc-windows-msvc') { $sf = @('--no-default-features') } else { $pkgs += @('-p','pf-console-ui') }
cargo clippy @pkgs --all-targets @sf --target ${{ matrix.target }} -- -D warnings
- name: Rustfmt check
if: matrix.target == 'x86_64-pc-windows-msvc'
shell: pwsh
run: cargo fmt -p punktfunk-client-windows -p punktfunk-client-session -p pf-client-core -p pf-presenter -p pf-console-ui -p pf-ffvk -- --check
- name: Test
if: matrix.target == 'x86_64-pc-windows-msvc'
shell: pwsh
run: cargo test -p punktfunk-client-windows -p punktfunk-client-session -p pf-client-core -p pf-presenter -p pf-console-ui -p pf-ffvk --target ${{ matrix.target }}