auth: publish audited password recovery

Publish the reviewed Gamertan Web Foundations v0.1.0-preview.4 snapshot with local-only administrative reset, atomic Argon2id credential replacement, mandatory rotation, all-session revocation, secret-free audit evidence, rollback coverage, and exact application-boundary guidance.

Exported from reviewed private source 403e5f6ef4d0cac683aaa76ed922236571d259a9 after trusted CI run 317 and exact Go 1.26.6 verification.

Material implementation assistance provided by OpenAI Codex; reviewed and verified through the maintainer workflow.

Signed-off-by: Cole Speelman <crspeelman@gmail.com>

CHANGELOG.md

@@ -2,6 +2,17 @@
 
 # Changelog
 
+## v0.1.0-preview.4 — 2026-08-18
+
+- Add an explicit local-administrator password recovery operation without
+  adding a public recovery endpoint or network protocol.
+- Atomically install a one-time Argon2id credential, restore mandatory password
+  rotation, revoke every session, and append a secret-free audit event.
+- Prove transaction rollback when the audit event cannot commit and document
+  private mode-`0600` delivery as application-owned policy.
+- Keep Previews 1–3 immutable; applications select Preview 4 explicitly when
+  adopting administrative recovery.
+
 ## v0.1.0-preview.3 — 2026-08-18
 
 - Add cryptographically generated temporary credentials and an explicit

README.md

@@ -2,7 +2,7 @@
 
 # Gamertan Web Foundations
 
-> Status: `v0.1.0-preview.2` public preview. APIs may change before a stable
+> Status: `v0.1.0-preview.4` public preview. APIs may change before a stable
 > release; Linux is the maintained release platform.
 
 Small, composable Go packages for the unglamorous boundaries of a careful web
@@ -23,14 +23,14 @@ Pin the preview in an application module, then import only the packages that
 application needs:
 
 ```bash
-go get gamertan.com/web@v0.1.0-preview.2
+go get gamertan.com/web@v0.1.0-preview.4
 go mod verify
 ```
 
 An application may also name the first package it intends to adopt:
 
 ```bash
-go get gamertan.com/web/requestmeta@v0.1.0-preview.2
+go get gamertan.com/web/requestmeta@v0.1.0-preview.4
 ```
 
 The version belongs to the `gamertan.com/web` module. Go compiles and links
@@ -56,8 +56,9 @@ without turning that portability into a maintained compatibility claim.
   rate limits.
 - [`abuse`](abuse): application-classified request abuse with pluggable persistence.
 - [`auth`](auth), [`authhttp`](authhttp), and [`authsqlite`](authsqlite):
-  passwords, forced first-login rotation, session revocation, platform-level
-  permissions, cookies, and a no-CGO SQLite adapter.
+  passwords, forced first-login rotation, local administrative recovery,
+  session revocation, platform-level permissions, cookies, and a no-CGO SQLite
+  adapter.
 - [`organizations`](organizations) and [`access`](access): organizations,
   teams, invitations, resource hierarchy, scoped roles, and audited temporary
   access without turning platform operation into tenant-data access.

SECURITY.md

@@ -14,3 +14,9 @@ service-level agreement. There is no bug bounty.
 
 The preview supports only versions explicitly listed in release notes. Security
 claims stop at the documented trust boundaries and executable tests.
+
+Password recovery is an explicitly local administrative capability. It must
+not be wired directly to a public route. Applications using it are responsible
+for local operator authorization and exclusive mode-`0600` credential delivery;
+the library transaction requires a new password change, revokes all sessions,
+and records a secret-free audit event.

auth/auth.go

@@ -63,6 +63,7 @@ type Repository interface {
 	CredentialByIdentifier(context.Context, string) (User, string, error)
 	CredentialByUserID(context.Context, string) (User, string, error)
 	ReplacePasswordAndRevokeSessions(context.Context, string, string, string, time.Time) error
+	ResetPasswordAndRevokeSessions(context.Context, string, string, string, time.Time, AuditEvent) error
 	UpdateLastLogin(context.Context, string, time.Time) error
 	CreateSession(context.Context, Session) error
 	PrincipalBySession(context.Context, [32]byte, time.Time) (Principal, Session, error)
@@ -111,6 +112,13 @@ type CreateUser struct {
 	RequirePasswordChange                  bool
 }
 
+// AdministrativePasswordReset describes a locally authorized recovery. The
+// application is responsible for delivering TemporaryPassword through a
+// private, one-time channel; the value must never be logged or audited.
+type AdministrativePasswordReset struct {
+	Identifier, TemporaryPassword string
+}
+
 func (service *Service) CreateUser(ctx context.Context, input CreateUser) (User, error) {
 	username := strings.TrimSpace(input.Username)
 	email := strings.TrimSpace(input.Email)
@@ -178,6 +186,53 @@ func (service *Service) ChangePassword(ctx context.Context, userID, currentPassw
 	return nil
 }
 
+// ResetPassword replaces an active user's credential without requiring the
+// current password. It is intended only for a locally authorized
+// administrative recovery command. The repository atomically requires another
+// password change, revokes all sessions, and appends a secret-free audit event.
+func (service *Service) ResetPassword(ctx context.Context, input AdministrativePasswordReset) (User, error) {
+	identifier := strings.TrimSpace(input.Identifier)
+	user, currentHash, err := service.repository.CredentialByIdentifier(ctx, identifier)
+	if errors.Is(err, ErrUserNotFound) {
+		return User{}, ErrUserNotFound
+	}
+	if err != nil {
+		return User{}, fmt.Errorf("auth: load credentials for administrative reset: %w", err)
+	}
+	if user.Status != "active" {
+		return User{}, ErrInactiveUser
+	}
+	if VerifyPassword(currentHash, input.TemporaryPassword) {
+		return User{}, ErrPasswordUnchanged
+	}
+	newHash, err := HashPasswordWithRandom(input.TemporaryPassword, service.random)
+	if err != nil {
+		return User{}, err
+	}
+	auditID, err := randomToken(service.random, 18)
+	if err != nil {
+		return User{}, err
+	}
+	now := service.now().UTC()
+	audit := AuditEvent{
+		ID:           auditID,
+		Action:       "auth.password.reset",
+		ResourceType: "user",
+		ResourceID:   user.ID,
+		Summary:      "A local administrator issued a one-time credential and revoked all sessions.",
+		CreatedAt:    now,
+	}
+	if err = service.repository.ResetPasswordAndRevokeSessions(ctx, user.ID, currentHash, newHash, now, audit); err != nil {
+		if errors.Is(err, ErrInvalidCredentials) {
+			return User{}, ErrInvalidCredentials
+		}
+		return User{}, fmt.Errorf("auth: reset password: %w", err)
+	}
+	user.PasswordChangeRequired = true
+	user.UpdatedAt = now
+	return user, nil
+}
+
 func (service *Service) Authenticate(ctx context.Context, identifier, password string, lifetime time.Duration) (string, Principal, error) {
 	if lifetime < 5*time.Minute || lifetime > 30*24*time.Hour {
 		return "", Principal{}, errors.New("auth: invalid session lifetime")

auth/service_test.go

@@ -65,6 +65,9 @@ func (repositoryStub) CredentialByUserID(context.Context, string) (User, string,
 func (repositoryStub) ReplacePasswordAndRevokeSessions(context.Context, string, string, string, time.Time) error {
 	return nil
 }
+func (repositoryStub) ResetPasswordAndRevokeSessions(context.Context, string, string, string, time.Time, AuditEvent) error {
+	return nil
+}
 func (repositoryStub) UpdateLastLogin(context.Context, string, time.Time) error { return nil }
 func (repositoryStub) CreateSession(context.Context, Session) error             { return nil }
 func (repository repositoryStub) PrincipalBySession(context.Context, [32]byte, time.Time) (Principal, Session, error) {

authhttp/authhttp_test.go

@@ -115,6 +115,9 @@ func (authHTTPRepository) CredentialByUserID(context.Context, string) (auth.User
 func (authHTTPRepository) ReplacePasswordAndRevokeSessions(context.Context, string, string, string, time.Time) error {
 	return nil
 }
+func (authHTTPRepository) ResetPasswordAndRevokeSessions(context.Context, string, string, string, time.Time, auth.AuditEvent) error {
+	return nil
+}
 func (authHTTPRepository) UpdateLastLogin(context.Context, string, time.Time) error { return nil }
 func (authHTTPRepository) CreateSession(context.Context, auth.Session) error        { return nil }
 func (repository authHTTPRepository) PrincipalBySession(context.Context, [32]byte, time.Time) (auth.Principal, auth.Session, error) {

authsqlite/store.go

@@ -243,6 +243,38 @@ func (store *Store) ReplacePasswordAndRevokeSessions(ctx context.Context, userID
 	return tx.Commit()
 }
 
+func (store *Store) ResetPasswordAndRevokeSessions(ctx context.Context, userID, expectedHash, newHash string, changedAt time.Time, audit auth.AuditEvent) error {
+	if !opaqueID(userID) || !text(expectedHash, 1024, false) || !text(newHash, 1024, false) || changedAt.IsZero() || !validAuditEvent(audit) || audit.ActorUserID != "" || audit.ResourceType != "user" || audit.ResourceID != userID || !audit.CreatedAt.Equal(changedAt) {
+		return auth.ErrInvalidCredentials
+	}
+	tx, err := store.db.BeginTx(ctx, nil)
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+	result, err := tx.ExecContext(ctx, `UPDATE gwf_password_credentials SET password_hash=?,changed_at=? WHERE user_id=? AND password_hash=?`, newHash, changedAt.Unix(), userID, expectedHash)
+	if err != nil {
+		return err
+	}
+	changed, err := result.RowsAffected()
+	if err != nil {
+		return err
+	}
+	if changed != 1 {
+		return auth.ErrInvalidCredentials
+	}
+	if _, err = tx.ExecContext(ctx, `UPDATE gwf_users SET password_change_required=1,updated_at=? WHERE id=?`, changedAt.Unix(), userID); err != nil {
+		return err
+	}
+	if _, err = tx.ExecContext(ctx, `DELETE FROM gwf_auth_sessions WHERE user_id=?`, userID); err != nil {
+		return err
+	}
+	if err = appendAudit(ctx, tx, audit); err != nil {
+		return err
+	}
+	return tx.Commit()
+}
+
 func (store *Store) UpdateLastLogin(ctx context.Context, userID string, when time.Time) error {
 	if !opaqueID(userID) || when.IsZero() {
 		return errors.New("authsqlite: invalid login update")
@@ -379,13 +411,25 @@ func (store *Store) GrantRole(ctx context.Context, userID, role string, when tim
 	return err
 }
 func (store *Store) AppendAudit(ctx context.Context, event auth.AuditEvent) error {
-	if !opaqueID(event.ID) || event.ActorUserID != "" && !opaqueID(event.ActorUserID) || !safeName(event.Action) || !safeName(event.ResourceType) || !text(event.ResourceID, 256, false) || !text(event.RequestID, 128, true) || !text(event.Summary, 1024, true) || event.CreatedAt.IsZero() {
+	if !validAuditEvent(event) {
 		return errors.New("authsqlite: invalid audit event")
 	}
-	_, err := store.db.ExecContext(ctx, `INSERT INTO gwf_audit_events(id,actor_user_id,action,resource_type,resource_id,request_id,summary,created_at) VALUES(?,NULLIF(?,''),?,?,?,?,?,?)`, event.ID, event.ActorUserID, event.Action, event.ResourceType, event.ResourceID, event.RequestID, event.Summary, event.CreatedAt.Unix())
+	return appendAudit(ctx, store.db, event)
+}
+
+type auditExecer interface {
+	ExecContext(context.Context, string, ...any) (sql.Result, error)
+}
+
+func appendAudit(ctx context.Context, execer auditExecer, event auth.AuditEvent) error {
+	_, err := execer.ExecContext(ctx, `INSERT INTO gwf_audit_events(id,actor_user_id,action,resource_type,resource_id,request_id,summary,created_at) VALUES(?,NULLIF(?,''),?,?,?,?,?,?)`, event.ID, event.ActorUserID, event.Action, event.ResourceType, event.ResourceID, event.RequestID, event.Summary, event.CreatedAt.Unix())
 	return err
 }
 
+func validAuditEvent(event auth.AuditEvent) bool {
+	return opaqueID(event.ID) && (event.ActorUserID == "" || opaqueID(event.ActorUserID)) && safeName(event.Action) && safeName(event.ResourceType) && text(event.ResourceID, 256, false) && text(event.RequestID, 128, true) && text(event.Summary, 1024, true) && !event.CreatedAt.IsZero()
+}
+
 func normalize(value string) string { return strings.ToLower(strings.TrimSpace(value)) }
 func safeName(value string) bool {
 	if value == "" || len(value) > 128 {

authsqlite/store_test.go

@@ -100,6 +100,98 @@ func TestRequiredPasswordChangeRotatesCredentialAndRevokesSessions(t *testing.T)
 	}
 }
 
+func TestAdministrativePasswordResetIsAtomicAndAudited(t *testing.T) {
+	store, err := Open(filepath.Join(t.TempDir(), "accounts.db"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer store.Close()
+	now := time.Unix(4000, 0).UTC()
+	service, err := auth.New(store, auth.Options{Now: func() time.Time { return now }})
+	if err != nil {
+		t.Fatal(err)
+	}
+	user, err := service.CreateUser(t.Context(), auth.CreateUser{Username: "recover.me", Email: "recover@example.test", DisplayName: "Recovery Test", Password: "original permanent credential"})
+	if err != nil {
+		t.Fatal(err)
+	}
+	token, _, err := service.Authenticate(t.Context(), user.Username, "original permanent credential", time.Hour)
+	if err != nil {
+		t.Fatal(err)
+	}
+	reset, err := service.ResetPassword(t.Context(), auth.AdministrativePasswordReset{Identifier: user.Email, TemporaryPassword: "one-time recovery credential"})
+	if err != nil || !reset.PasswordChangeRequired {
+		t.Fatalf("reset=%+v err=%v", reset, err)
+	}
+	if _, err = service.Session(t.Context(), token); !errors.Is(err, auth.ErrSessionNotFound) {
+		t.Fatalf("session survived reset: %v", err)
+	}
+	if _, _, err = service.Authenticate(t.Context(), user.Username, "original permanent credential", time.Hour); !errors.Is(err, auth.ErrInvalidCredentials) {
+		t.Fatalf("old credential survived reset: %v", err)
+	}
+	_, principal, err := service.Authenticate(t.Context(), user.Username, "one-time recovery credential", time.Hour)
+	if err != nil || !principal.User.PasswordChangeRequired {
+		t.Fatalf("recovery principal=%+v err=%v", principal, err)
+	}
+	var action, summary string
+	var events int
+	if err = store.db.QueryRow(`SELECT COUNT(*),action,summary FROM gwf_audit_events WHERE resource_id=?`, user.ID).Scan(&events, &action, &summary); err != nil {
+		t.Fatal(err)
+	}
+	if events != 1 || action != "auth.password.reset" || strings.Contains(summary, "one-time recovery credential") || !strings.Contains(summary, "revoked all sessions") {
+		t.Fatalf("events=%d action=%q summary=%q", events, action, summary)
+	}
+	if _, err = service.ResetPassword(t.Context(), auth.AdministrativePasswordReset{Identifier: user.Username, TemporaryPassword: "one-time recovery credential"}); !errors.Is(err, auth.ErrPasswordUnchanged) {
+		t.Fatalf("same credential err=%v", err)
+	}
+}
+
+func TestAdministrativePasswordResetRollsBackWhenAuditCannotCommit(t *testing.T) {
+	store, err := Open(filepath.Join(t.TempDir(), "accounts.db"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer store.Close()
+	now := time.Unix(5000, 0).UTC()
+	service, err := auth.New(store, auth.Options{Now: func() time.Time { return now }})
+	if err != nil {
+		t.Fatal(err)
+	}
+	user, err := service.CreateUser(t.Context(), auth.CreateUser{Username: "rollback.me", Email: "rollback@example.test", DisplayName: "Rollback Test", Password: "original permanent credential"})
+	if err != nil {
+		t.Fatal(err)
+	}
+	token, _, err := service.Authenticate(t.Context(), user.Username, "original permanent credential", time.Hour)
+	if err != nil {
+		t.Fatal(err)
+	}
+	user, currentHash, err := store.CredentialByUserID(t.Context(), user.ID)
+	if err != nil {
+		t.Fatal(err)
+	}
+	newHash, err := auth.HashPassword("one-time recovery credential")
+	if err != nil {
+		t.Fatal(err)
+	}
+	audit := auth.AuditEvent{ID: "duplicate-audit-id", Action: "auth.password.reset", ResourceType: "user", ResourceID: user.ID, Summary: "A local administrator issued a one-time credential and revoked all sessions.", CreatedAt: now}
+	if err = store.AppendAudit(t.Context(), audit); err != nil {
+		t.Fatal(err)
+	}
+	if err = store.ResetPasswordAndRevokeSessions(t.Context(), user.ID, currentHash, newHash, now, audit); err == nil {
+		t.Fatal("duplicate audit unexpectedly committed reset")
+	}
+	if _, err = service.Session(t.Context(), token); err != nil {
+		t.Fatalf("rollback revoked session: %v", err)
+	}
+	_, principal, err := service.Authenticate(t.Context(), user.Username, "original permanent credential", time.Hour)
+	if err != nil || principal.User.PasswordChangeRequired {
+		t.Fatalf("original credential not restored: principal=%+v err=%v", principal, err)
+	}
+	if _, _, err = service.Authenticate(t.Context(), user.Username, "one-time recovery credential", time.Hour); !errors.Is(err, auth.ErrInvalidCredentials) {
+		t.Fatalf("uncommitted recovery credential accepted: %v", err)
+	}
+}
+
 func TestMigrationAddsPasswordRequirementWithoutChangingExistingUsers(t *testing.T) {
 	path := filepath.Join(t.TempDir(), "accounts.db")
 	database, err := sql.Open("sqlite", path)

docs/GETTING_STARTED.md

@@ -25,7 +25,7 @@ The packages are ordinary Go imports. Pin the current preview and verify its
 module checksum:
 
 ```bash
-go get gamertan.com/web/requestmeta@v0.1.0-preview.3
+go get gamertan.com/web/requestmeta@v0.1.0-preview.4
 go mod verify
 ```
 
@@ -67,6 +67,14 @@ adapter. Clear the browser cookie and require a fresh login after success. Do
 not treat a redirect alone as enforcement; apply the restriction before every
 protected handler.
 
+For operator-led recovery, expose `auth.ResetPassword` only through a local
+administrative command—not a public HTTP endpoint. The operation installs an
+application-generated one-time credential, sets `PasswordChangeRequired`,
+revokes every existing session, and appends a secret-free audit event in the
+same repository transaction. Deliver that credential through an exclusive
+root-owned mode-`0600` file, delete it after successful rotation, and never put
+it in command arguments, stdout, logs, manifests, or deployment state.
+
 ## Add HTML without merging responsibilities
 
 Handlers should convert request and service state into typed display data.

docs/MODULES.md

@@ -18,7 +18,7 @@ import "gamertan.com/web/requestmeta"
 and request the containing module at an exact version:
 
 ```bash
-go get gamertan.com/web/requestmeta@v0.1.0-preview.2
+go get gamertan.com/web/requestmeta@v0.1.0-preview.4
 ```
 
 Only imported packages are compiled and linked. The packages nevertheless

docs/THREAT_MODEL.md

@@ -23,6 +23,15 @@ the library does not infer route policy. Temporary credentials must be written
 to a private channel or mode-`0600` file and must never be printed into logs,
 manifests, process arguments, or deployment state.
 
+Administrative recovery is deliberately a separate capability. The storage
+adapter atomically replaces the credential, restores the password-change
+requirement, revokes all sessions, and appends a generic audit event. The core
+library does not expose a recovery HTTP handler, deliver the credential, or
+authorize the local operator. Applications must keep that command local,
+generate the credential cryptographically, and write it only to a newly created
+private file. A recovery must not reveal whether an account exists through a
+public request surface.
+
 Unsafe methods without an exact Origin or trustworthy same-origin Fetch
 Metadata fail the origin check. Authentication middleware fails closed when its
 service or `__Host-` cookie policy is invalid. Imported request records have