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2024-11-18nix: wrap program from libexecOphestra Umiker
This avoids renaming the fortify binary. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-18nix: integrate dynamic usersOphestra Umiker
Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-18app: alternative inner home pathOphestra Umiker
Support binding home to an alternative path in the mount namespace. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-17fmsg: add to wg prior to enqueueOphestra Umiker
Adding after channel write is racy. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-17app/start: check for cleanup and abort conditionOphestra Umiker
Dirty fix. Will rewrite after fsu integration complete. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-17app: append # for ChangeHosts message with numerical uidOphestra Umiker
Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-17cmd/fuserdb: generate group entriesOphestra Umiker
Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-17cmd/fuserdb: systemd userdb drop-in entries generatorOphestra Umiker
This provides user records via nss-systemd. Static drop-in entries are generated to reduce complexity and attack surface. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-16app: integrate fsuOphestra Umiker
This removes the dependency on external user switchers like sudo/machinectl and decouples fortify user ids from the passwd database. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-10nix: remove portal paths from defaultOphestra Umiker
Despite presenting itself as a generic desktop integration interface, xdg-desktop portal is highly flatpak-centric and only supports flatpak and snap in practice. It is a significant attack surface to begin with as it is a privileged process which accepts input from unprivileged processes, and the lack of support for anything other than fortify also introduces various information leaks when exposed to fortify as it treats fortified programs as unsandboxed, privileged programs in many cases. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-09app/config: rename map_real_uid from use_real_uidOphestra Umiker
This option only changes mapped uid in the user namespace. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-09cmd/fshim: set no_new_privs flagOphestra Umiker
Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-08nix: remove absolute Exec pathsOphestra Umiker
Absolute paths set for Exec causes the program to be launched as the privileged user. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-06nix: keep fshim and finit namesOphestra Umiker
Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-06nix: improve start scriptOphestra Umiker
Zsh store path in shebang. Replace writeShellScript with writeScript since runtimeShell is not overridable. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-06release: 0.1.0Ophestra Umiker
This release significantly changes the command line interface, and updates the NixOS module to finally produce meaningful sandbox configuration. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-06update README documentOphestra Umiker
Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-06nix: generate strict sandbox configurationOphestra Umiker
Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-06app: support full /dev accessOphestra Umiker
Also moved /dev/fortify to /fortify since it is impossible to create new directories in /dev from the init namespace and bind mounting its contents has undesirable side effects. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-05fortify: root check before command handlingOphestra Umiker
Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-05fortify: override default usage functionOphestra Umiker
Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-05fortify: implement cleaner argument structureOphestra Umiker
Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-04linux: provide access to stdoutOphestra Umiker
Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-04app: separate auto etc from permissive defaultsOphestra Umiker
Populating /etc with symlinks is quite useful even outside the permissive defaults usage pattern. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-04app/config: UseRealUID as true in templateOphestra Umiker
The template is based on a Chromium setup, which this workaround was created for. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-04release: 0.0.11Ophestra Umiker
This will be the final release before major command line interface changes. This version is tagged as it contains many fixes that still impacts the permissive defaults usage pattern. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-04workflows: build all packages with full ldflagsOphestra Umiker
Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-04fmsg: drop messages when msgbuf is full during withholdOphestra Umiker
Logging functions are not expected to block. This change fixes multiple hangs where more than 64 messages are produced during withhold. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-04cmd/fsu: remove import of internal packageOphestra Umiker
Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-04app: support mapping target uid as privileged uid in sandboxOphestra Umiker
Chromium's D-Bus client implementation refuses to work when its getuid call returns a different value than what the D-Bus server is running as. The reason behind this is not fully understood, but this workaround is implemented to support chromium and electron apps. This is not used by default since it has many side effects that break many other programs, like SSH on NixOS. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-04app: format mapped uid instead of real uidOphestra Umiker
Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-03system/dbus: buffer xdg-dbus-proxy messagesOphestra Umiker
Pointing xdg-dbus-proxy to stdout/stderr makes a huge mess. This change enables app to neatly print out prefixed xdg-dbus-proxy messages after output is resumed. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-03cmd/fshim/ipc: friendly setup timeout messageOphestra Umiker
This message eventually gets returned by the app's Start method, so they should be wrapped to provide a friendly message. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-02fortify: replace direct syscall with prctl wrapperOphestra Umiker
Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-11-02cmd: shim and init into separate binariesOphestra Umiker
This change also fixes a deadlock when shim fails to connect and complete the setup. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-10-28add package doc commentsOphestra Umiker
Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-10-28release: 0.0.10Ophestra Umiker
Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-10-28fsu: check parent executable pathOphestra Umiker
Only allow main program to launch fsu. This change and further checks in the main program reduces attack surface. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-10-28app/start: skip cleanup if shim is nilOphestra Umiker
Shim is created before any system operation happens. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-10-28shim: expose checkPid in constructorOphestra Umiker
This will be supported soon when launching via fsu. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-10-28fsu: implement simple setuid user switcherOphestra Umiker
Contains path to fortify, set at compile time, authenticates based on a simple uid range assignment file which also acts as the allow list. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-10-27fortify: exit if seal returns errorOphestra Umiker
Wait should not be called on an unsealed App. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-10-27system/dbus: compare sealed value by stringOphestra Umiker
Stringer method of dbus.Proxy returns a string representation of its args stream when sealed. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-10-27system: move sd_booted implementation to os abstractionOphestra Umiker
This implements lazy loading of the systemd marker (they are not accessed in init and shim) and ensures consistent behaviour when running with a stub. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-10-27release: 0.0.9Ophestra Umiker
Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-10-27fmsg: initialise dequeue prior to withhold/resumeOphestra Umiker
This fixes the hang on resume when no messages were ever printed. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-10-27release: 0.0.8Ophestra Umiker
Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-10-27shim: user switcher process management structOphestra Umiker
This change moves all user switcher and shim management to the shim package and withholds output while shim is alive. This also eliminated all exit scenarios where revert is skipped. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-10-26fmsg: support temporarily withholding outputOphestra Umiker
Trying to print to a shared stdout is a terrible idea. This change makes it possible to withhold output for the lifetime of the sandbox. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
2024-10-25app: separate nixos test cases from testsOphestra Umiker
Test cases are very long, separating them improves editor performance. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>