Restructure modules (#1572)

* Move portbase into monorepo * Add new simple module mgr * [WIP] Switch to new simple module mgr * Add StateMgr and more worker variants * [WIP] Switch more modules * [WIP] Switch more modules * [WIP] swtich more modules * [WIP] switch all SPN modules * [WIP] switch all service modules * [WIP] Convert all workers to the new module system * [WIP] add new task system to module manager * [WIP] Add second take for scheduling workers * [WIP] Add FIXME for bugs in new scheduler * [WIP] Add minor improvements to scheduler * [WIP] Add new worker scheduler * [WIP] Fix more bug related to new module system * [WIP] Fix start handing of the new module system * [WIP] Improve startup process * [WIP] Fix minor issues * [WIP] Fix missing subsystem in settings * [WIP] Initialize managers in constructor * [WIP] Move module event initialization to constrictors * [WIP] Fix setting for enabling and disabling the SPN module * [WIP] Move API registeration into module construction * [WIP] Update states mgr for all modules * [WIP] Add CmdLine operation support * Add state helper methods to module group and instance * Add notification and module status handling to status package * Fix starting issues * Remove pilot widget and update security lock to new status data * Remove debug logs * Improve http server shutdown * Add workaround for cleanly shutting down firewall+netquery * Improve logging * Add syncing states with notifications for new module system * Improve starting, stopping, shutdown; resolve FIXMEs/TODOs * [WIP] Fix most unit tests * Review new module system and fix minor issues * Push shutdown and restart events again via API * Set sleep mode via interface * Update example/template module * [WIP] Fix spn/cabin unit test * Remove deprecated UI elements * Make log output more similar for the logging transition phase * Switch spn hub and observer cmds to new module system * Fix log sources * Make worker mgr less error prone * Fix tests and minor issues * Fix observation hub * Improve shutdown and restart handling * Split up big connection.go source file * Move varint and dsd packages to structures repo * Improve expansion test * Fix linter warnings * Fix interception module on windows * Fix linter errors --------- Co-authored-by: Vladimir Stoilov <vladimir@safing.io>
2024-08-09 17:15:48 +02:00
parent 10a77498f4
commit 80664d1a27
647 changed files with 37690 additions and 3366 deletions
--- a/base/rng/rng.go
+++ b/base/rng/rng.go
@@ -0,0 +1,114 @@
+package rng
+
+import (
+	"crypto/aes"
+	"crypto/cipher"
+	"crypto/rand"
+	"errors"
+	"fmt"
+	"sync"
+	"sync/atomic"
+
+	"github.com/aead/serpent"
+	"github.com/seehuhn/fortuna"
+
+	"github.com/safing/portmaster/service/mgr"
+)
+
+// Rng is a random number generator.
+type Rng struct {
+	mgr *mgr.Manager
+
+	instance instance
+}
+
+var (
+	rng      *fortuna.Generator
+	rngLock  sync.Mutex
+	rngReady = false
+
+	rngCipher = "aes"
+	// Possible values: "aes", "serpent".
+)
+
+func newCipher(key []byte) (cipher.Block, error) {
+	switch rngCipher {
+	case "aes":
+		return aes.NewCipher(key)
+	case "serpent":
+		return serpent.NewCipher(key)
+	default:
+		return nil, fmt.Errorf("unknown or unsupported cipher: %s", rngCipher)
+	}
+}
+
+// Manager returns the module manager.
+func (r *Rng) Manager() *mgr.Manager {
+	return r.mgr
+}
+
+// Start starts the module.
+func (r *Rng) Start() error {
+	rngLock.Lock()
+	defer rngLock.Unlock()
+
+	rng = fortuna.NewGenerator(newCipher)
+	if rng == nil {
+		return errors.New("failed to initialize rng")
+	}
+
+	// add another (async) OS rng seed
+	r.mgr.Go("initial rng feed", func(_ *mgr.WorkerCtx) error {
+		// get entropy from OS
+		osEntropy := make([]byte, minFeedEntropy/8)
+		_, err := rand.Read(osEntropy)
+		if err != nil {
+			return fmt.Errorf("could not read entropy from os: %w", err)
+		}
+		// feed
+		rngLock.Lock()
+		rng.Reseed(osEntropy)
+		rngLock.Unlock()
+		return nil
+	})
+
+	// mark as ready
+	rngReady = true
+
+	// random source: OS
+	r.mgr.Go("os rng feeder", osFeeder)
+
+	// random source: goroutine ticks
+	r.mgr.Go("tick rng feeder", tickFeeder)
+
+	// full feeder
+	r.mgr.Go("full feeder", fullFeeder)
+
+	return nil
+}
+
+// Stop stops the module.
+func (r *Rng) Stop() error {
+	return nil
+}
+
+var (
+	module     *Rng
+	shimLoaded atomic.Bool
+)
+
+// New returns a new rng.
+func New(instance instance) (*Rng, error) {
+	if !shimLoaded.CompareAndSwap(false, true) {
+		return nil, errors.New("only one instance allowed")
+	}
+	m := mgr.New("Rng")
+	module = &Rng{
+		mgr:      m,
+		instance: instance,
+	}
+
+	return module, nil
+}
+
+type instance interface{}