feat(lib): use new challenge creation flow (#749)

* feat(decaymap): add Delete method

Signed-off-by: Xe Iaso <me@xeiaso.net>

* chore(lib/challenge): refactor Validate to take ValidateInput

Signed-off-by: Xe Iaso <me@xeiaso.net>

* feat(lib): implement store interface

Signed-off-by: Xe Iaso <me@xeiaso.net>

* feat(lib/store): all metapackage to import all store implementations

Signed-off-by: Xe Iaso <me@xeiaso.net>

* chore(policy): import all store backends

Signed-off-by: Xe Iaso <me@xeiaso.net>

* feat(lib): use new challenge creation flow

Previously Anubis constructed challenge strings from request metadata.
This was a good idea in spirit, but has turned out to be a very bad idea
in practice. This new flow reuses the Store facility to dynamically
create challenge values with completely random data.

This is a fairly big rewrite of how Anubis processes challenges. Right
now it defaults to using the in-memory storage backend, but on-disk
(boltdb) and valkey-based adaptors will come soon.

Signed-off-by: Xe Iaso <me@xeiaso.net>

* chore(decaymap): fix documentation typo

Signed-off-by: Xe Iaso <me@xeiaso.net>

* chore(lib): fix SA4004

Signed-off-by: Xe Iaso <me@xeiaso.net>

* test(lib/store): make generic storage interface test adaptor

Signed-off-by: Xe Iaso <me@xeiaso.net>

* chore: spelling

Signed-off-by: Xe Iaso <me@xeiaso.net>

* fix(decaymap): invert locking process for Delete

Signed-off-by: Xe Iaso <me@xeiaso.net>

* feat(lib/store): add bbolt store implementation

Signed-off-by: Xe Iaso <me@xeiaso.net>

* chore: spelling

Signed-off-by: Xe Iaso <me@xeiaso.net>

* chore: go mod tidy

Signed-off-by: Xe Iaso <me@xeiaso.net>

* chore(devcontainer): adapt to docker compose, add valkey service

Signed-off-by: Xe Iaso <me@xeiaso.net>

* fix(lib): make challenges live for 30 minutes by default

Signed-off-by: Xe Iaso <me@xeiaso.net>

* feat(lib/store): implement valkey backend

Signed-off-by: Xe Iaso <me@xeiaso.net>

* test(lib/store/valkey): disable tests if not using docker

Signed-off-by: Xe Iaso <me@xeiaso.net>

* test(lib/policy/config): ensure valkey stores can be loaded

Signed-off-by: Xe Iaso <me@xeiaso.net>

* Update metadata

check-spelling run (pull_request) for Xe/store-interface

Signed-off-by: check-spelling-bot <check-spelling-bot@users.noreply.github.com>
on-behalf-of: @check-spelling <check-spelling-bot@check-spelling.dev>

* chore(devcontainer): remove port forwards because vs code handles that for you

Signed-off-by: Xe Iaso <me@xeiaso.net>

* docs(default-config): add a nudge to the storage backends section of the docs

Signed-off-by: Xe Iaso <me@xeiaso.net>

* chore(docs): listen on 0.0.0.0 for dev container support

Signed-off-by: Xe Iaso <me@xeiaso.net>

* docs(policy): document storage backends

Signed-off-by: Xe Iaso <me@xeiaso.net>

* docs: update CHANGELOG and internal links

Signed-off-by: Xe Iaso <me@xeiaso.net>

* docs(admin/policies): don't start a sentence with as

Signed-off-by: Xe Iaso <me@xeiaso.net>

* chore: fixes found in review

Signed-off-by: Xe Iaso <me@xeiaso.net>

---------

Signed-off-by: Xe Iaso <me@xeiaso.net>
Signed-off-by: check-spelling-bot <check-spelling-bot@users.noreply.github.com>

lib/store/bbolt/factory_test.go

@@ -0,0 +1,50 @@
+package bbolt
+
+import (
+	"encoding/json"
+	"errors"
+	"path/filepath"
+	"testing"
+)
+
+func TestFactoryValid(t *testing.T) {
+	f := Factory{}
+
+	t.Run("bad config", func(t *testing.T) {
+		if err := f.Valid(json.RawMessage(`}`)); err == nil {
+			t.Error("wanted parsing failure but got a successful result")
+		}
+	})
+
+	t.Run("invalid config", func(t *testing.T) {
+		for _, tt := range []struct {
+			name string
+			cfg  Config
+			err  error
+		}{
+			{
+				name: "missing path",
+				cfg:  Config{},
+				err:  ErrMissingPath,
+			},
+			{
+				name: "unwritable folder",
+				cfg: Config{
+					Path: filepath.Join("/", "testdb"),
+				},
+				err: ErrCantWriteToPath,
+			},
+		} {
+			t.Run(tt.name, func(t *testing.T) {
+				data, err := json.Marshal(tt.cfg)
+				if err != nil {
+					t.Fatal(err)
+				}
+
+				if err := f.Valid(json.RawMessage(data)); !errors.Is(err, tt.err) {
+					t.Error(err)
+				}
+			})
+		}
+	})
+}