use userID instead of username everywhere

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

hscontrol/db/db_test.go

@@ -121,12 +121,12 @@ func TestMigrations(t *testing.T) {
 			dbPath: "testdata/0-23-0-to-0-24-0-preauthkey-tags-table.sqlite",
 			wantFunc: func(t *testing.T, h *HSDatabase) {
 				keys, err := Read(h.DB, func(rx *gorm.DB) ([]types.PreAuthKey, error) {
-					kratest, err := ListPreAuthKeys(rx, "kratest")
+					kratest, err := ListPreAuthKeysByUser(rx, 1) // kratest
 					if err != nil {
 						return nil, err
 					}
 
-					testkra, err := ListPreAuthKeys(rx, "testkra")
+					testkra, err := ListPreAuthKeysByUser(rx, 2) // testkra
 					if err != nil {
 						return nil, err
 					}

hscontrol/db/node.go

@@ -91,15 +91,15 @@ func (hsdb *HSDatabase) ListEphemeralNodes() (types.Nodes, error) {
 	})
 }
 
-func (hsdb *HSDatabase) getNode(user string, name string) (*types.Node, error) {
+func (hsdb *HSDatabase) getNode(uid types.UserID, name string) (*types.Node, error) {
 	return Read(hsdb.DB, func(rx *gorm.DB) (*types.Node, error) {
-		return getNode(rx, user, name)
+		return getNode(rx, uid, name)
 	})
 }
 
 // getNode finds a Node by name and user and returns the Node struct.
-func getNode(tx *gorm.DB, user string, name string) (*types.Node, error) {
+func getNode(tx *gorm.DB, uid types.UserID, name string) (*types.Node, error) {
-	nodes, err := ListNodesByUser(tx, user)
+	nodes, err := ListNodesByUser(tx, uid)
 	if err != nil {
 		return nil, err
 	}

hscontrol/db/node_test.go

@@ -30,10 +30,10 @@ func (s *Suite) TestGetNode(c *check.C) {
 	user, err := db.CreateUser("test")
 	c.Assert(err, check.IsNil)
 
-	pak, err := db.CreatePreAuthKey(user.Name, false, false, nil, nil)
+	pak, err := db.CreatePreAuthKey(types.UserID(user.ID), false, false, nil, nil)
 	c.Assert(err, check.IsNil)
 
-	_, err = db.getNode("test", "testnode")
+	_, err = db.getNode(types.UserID(user.ID), "testnode")
 	c.Assert(err, check.NotNil)
 
 	nodeKey := key.NewNode()
@@ -51,7 +51,7 @@ func (s *Suite) TestGetNode(c *check.C) {
 	trx := db.DB.Save(node)
 	c.Assert(trx.Error, check.IsNil)
 
-	_, err = db.getNode("test", "testnode")
+	_, err = db.getNode(types.UserID(user.ID), "testnode")
 	c.Assert(err, check.IsNil)
 }
 
@@ -59,7 +59,7 @@ func (s *Suite) TestGetNodeByID(c *check.C) {
 	user, err := db.CreateUser("test")
 	c.Assert(err, check.IsNil)
 
-	pak, err := db.CreatePreAuthKey(user.Name, false, false, nil, nil)
+	pak, err := db.CreatePreAuthKey(types.UserID(user.ID), false, false, nil, nil)
 	c.Assert(err, check.IsNil)
 
 	_, err = db.GetNodeByID(0)
@@ -88,7 +88,7 @@ func (s *Suite) TestGetNodeByAnyNodeKey(c *check.C) {
 	user, err := db.CreateUser("test")
 	c.Assert(err, check.IsNil)
 
-	pak, err := db.CreatePreAuthKey(user.Name, false, false, nil, nil)
+	pak, err := db.CreatePreAuthKey(types.UserID(user.ID), false, false, nil, nil)
 	c.Assert(err, check.IsNil)
 
 	_, err = db.GetNodeByID(0)
@@ -136,7 +136,7 @@ func (s *Suite) TestHardDeleteNode(c *check.C) {
 	_, err = db.DeleteNode(&node, xsync.NewMapOf[types.NodeID, bool]())
 	c.Assert(err, check.IsNil)
 
-	_, err = db.getNode(user.Name, "testnode3")
+	_, err = db.getNode(types.UserID(user.ID), "testnode3")
 	c.Assert(err, check.NotNil)
 }
 
@@ -144,7 +144,7 @@ func (s *Suite) TestListPeers(c *check.C) {
 	user, err := db.CreateUser("test")
 	c.Assert(err, check.IsNil)
 
-	pak, err := db.CreatePreAuthKey(user.Name, false, false, nil, nil)
+	pak, err := db.CreatePreAuthKey(types.UserID(user.ID), false, false, nil, nil)
 	c.Assert(err, check.IsNil)
 
 	_, err = db.GetNodeByID(0)
@@ -190,7 +190,7 @@ func (s *Suite) TestGetACLFilteredPeers(c *check.C) {
 	for _, name := range []string{"test", "admin"} {
 		user, err := db.CreateUser(name)
 		c.Assert(err, check.IsNil)
-		pak, err := db.CreatePreAuthKey(user.Name, false, false, nil, nil)
+		pak, err := db.CreatePreAuthKey(types.UserID(user.ID), false, false, nil, nil)
 		c.Assert(err, check.IsNil)
 		stor = append(stor, base{user, pak})
 	}
@@ -282,10 +282,10 @@ func (s *Suite) TestExpireNode(c *check.C) {
 	user, err := db.CreateUser("test")
 	c.Assert(err, check.IsNil)
 
-	pak, err := db.CreatePreAuthKey(user.Name, false, false, nil, nil)
+	pak, err := db.CreatePreAuthKey(types.UserID(user.ID), false, false, nil, nil)
 	c.Assert(err, check.IsNil)
 
-	_, err = db.getNode("test", "testnode")
+	_, err = db.getNode(types.UserID(user.ID), "testnode")
 	c.Assert(err, check.NotNil)
 
 	nodeKey := key.NewNode()
@@ -303,7 +303,7 @@ func (s *Suite) TestExpireNode(c *check.C) {
 	}
 	db.DB.Save(node)
 
-	nodeFromDB, err := db.getNode("test", "testnode")
+	nodeFromDB, err := db.getNode(types.UserID(user.ID), "testnode")
 	c.Assert(err, check.IsNil)
 	c.Assert(nodeFromDB, check.NotNil)
 
@@ -313,7 +313,7 @@ func (s *Suite) TestExpireNode(c *check.C) {
 	err = db.NodeSetExpiry(nodeFromDB.ID, now)
 	c.Assert(err, check.IsNil)
 
-	nodeFromDB, err = db.getNode("test", "testnode")
+	nodeFromDB, err = db.getNode(types.UserID(user.ID), "testnode")
 	c.Assert(err, check.IsNil)
 
 	c.Assert(nodeFromDB.IsExpired(), check.Equals, true)
@@ -323,10 +323,10 @@ func (s *Suite) TestSetTags(c *check.C) {
 	user, err := db.CreateUser("test")
 	c.Assert(err, check.IsNil)
 
-	pak, err := db.CreatePreAuthKey(user.Name, false, false, nil, nil)
+	pak, err := db.CreatePreAuthKey(types.UserID(user.ID), false, false, nil, nil)
 	c.Assert(err, check.IsNil)
 
-	_, err = db.getNode("test", "testnode")
+	_, err = db.getNode(types.UserID(user.ID), "testnode")
 	c.Assert(err, check.NotNil)
 
 	nodeKey := key.NewNode()
@@ -349,7 +349,7 @@ func (s *Suite) TestSetTags(c *check.C) {
 	sTags := []string{"tag:test", "tag:foo"}
 	err = db.SetTags(node.ID, sTags)
 	c.Assert(err, check.IsNil)
-	node, err = db.getNode("test", "testnode")
+	node, err = db.getNode(types.UserID(user.ID), "testnode")
 	c.Assert(err, check.IsNil)
 	c.Assert(node.ForcedTags, check.DeepEquals, sTags)
 
@@ -357,7 +357,7 @@ func (s *Suite) TestSetTags(c *check.C) {
 	eTags := []string{"tag:bar", "tag:test", "tag:unknown", "tag:test"}
 	err = db.SetTags(node.ID, eTags)
 	c.Assert(err, check.IsNil)
-	node, err = db.getNode("test", "testnode")
+	node, err = db.getNode(types.UserID(user.ID), "testnode")
 	c.Assert(err, check.IsNil)
 	c.Assert(
 		node.ForcedTags,
@@ -368,7 +368,7 @@ func (s *Suite) TestSetTags(c *check.C) {
 	// test removing tags
 	err = db.SetTags(node.ID, []string{})
 	c.Assert(err, check.IsNil)
-	node, err = db.getNode("test", "testnode")
+	node, err = db.getNode(types.UserID(user.ID), "testnode")
 	c.Assert(err, check.IsNil)
 	c.Assert(node.ForcedTags, check.DeepEquals, []string{})
 }
@@ -568,7 +568,7 @@ func TestAutoApproveRoutes(t *testing.T) {
 			user, err := adb.CreateUser("test")
 			require.NoError(t, err)
 
-			pak, err := adb.CreatePreAuthKey(user.Name, false, false, nil, nil)
+			pak, err := adb.CreatePreAuthKey(types.UserID(user.ID), false, false, nil, nil)
 			require.NoError(t, err)
 
 			nodeKey := key.NewNode()
@@ -700,10 +700,10 @@ func TestListEphemeralNodes(t *testing.T) {
 	user, err := db.CreateUser("test")
 	require.NoError(t, err)
 
-	pak, err := db.CreatePreAuthKey(user.Name, false, false, nil, nil)
+	pak, err := db.CreatePreAuthKey(types.UserID(user.ID), false, false, nil, nil)
 	require.NoError(t, err)
 
-	pakEph, err := db.CreatePreAuthKey(user.Name, false, true, nil, nil)
+	pakEph, err := db.CreatePreAuthKey(types.UserID(user.ID), false, true, nil, nil)
 	require.NoError(t, err)
 
 	node := types.Node{

hscontrol/db/preauth_keys.go

@@ -23,29 +23,27 @@ var (
 )
 
 func (hsdb *HSDatabase) CreatePreAuthKey(
-	// TODO(kradalby): Should be ID, not name
+	uid types.UserID,
-	userName string,
 	reusable bool,
 	ephemeral bool,
 	expiration *time.Time,
 	aclTags []string,
 ) (*types.PreAuthKey, error) {
 	return Write(hsdb.DB, func(tx *gorm.DB) (*types.PreAuthKey, error) {
-		return CreatePreAuthKey(tx, userName, reusable, ephemeral, expiration, aclTags)
+		return CreatePreAuthKey(tx, uid, reusable, ephemeral, expiration, aclTags)
 	})
 }
 
 // CreatePreAuthKey creates a new PreAuthKey in a user, and returns it.
 func CreatePreAuthKey(
 	tx *gorm.DB,
-	// TODO(kradalby): Should be ID, not name
+	uid types.UserID,
-	userName string,
 	reusable bool,
 	ephemeral bool,
 	expiration *time.Time,
 	aclTags []string,
 ) (*types.PreAuthKey, error) {
-	user, err := GetUserByUsername(tx, userName)
+	user, err := GetUserByID(tx, uid)
 	if err != nil {
 		return nil, err
 	}
@@ -89,15 +87,15 @@ func CreatePreAuthKey(
 	return &key, nil
 }
 
-func (hsdb *HSDatabase) ListPreAuthKeys(userName string) ([]types.PreAuthKey, error) {
+func (hsdb *HSDatabase) ListPreAuthKeys(uid types.UserID) ([]types.PreAuthKey, error) {
 	return Read(hsdb.DB, func(rx *gorm.DB) ([]types.PreAuthKey, error) {
-		return ListPreAuthKeys(rx, userName)
+		return ListPreAuthKeysByUser(rx, uid)
 	})
 }
 
-// ListPreAuthKeys returns the list of PreAuthKeys for a user.
+// ListPreAuthKeysByUser returns the list of PreAuthKeys for a user.
-func ListPreAuthKeys(tx *gorm.DB, userName string) ([]types.PreAuthKey, error) {
+func ListPreAuthKeysByUser(tx *gorm.DB, uid types.UserID) ([]types.PreAuthKey, error) {
-	user, err := GetUserByUsername(tx, userName)
+	user, err := GetUserByID(tx, uid)
 	if err != nil {
 		return nil, err
 	}

hscontrol/db/preauth_keys_test.go

@@ -11,14 +11,14 @@ import (
 )
 
 func (*Suite) TestCreatePreAuthKey(c *check.C) {
-	_, err := db.CreatePreAuthKey("bogus", true, false, nil, nil)
+	// ID does not exist
-
+	_, err := db.CreatePreAuthKey(12345, true, false, nil, nil)
 	c.Assert(err, check.NotNil)
 
 	user, err := db.CreateUser("test")
 	c.Assert(err, check.IsNil)
 
-	key, err := db.CreatePreAuthKey(user.Name, true, false, nil, nil)
+	key, err := db.CreatePreAuthKey(types.UserID(user.ID), true, false, nil, nil)
 	c.Assert(err, check.IsNil)
 
 	// Did we get a valid key?
@@ -26,17 +26,18 @@ func (*Suite) TestCreatePreAuthKey(c *check.C) {
 	c.Assert(len(key.Key), check.Equals, 48)
 
 	// Make sure the User association is populated
-	c.Assert(key.User.Name, check.Equals, user.Name)
+	c.Assert(key.User.ID, check.Equals, user.ID)
 
-	_, err = db.ListPreAuthKeys("bogus")
+	// ID does not exist
+	_, err = db.ListPreAuthKeys(1000000)
 	c.Assert(err, check.NotNil)
 
-	keys, err := db.ListPreAuthKeys(user.Name)
+	keys, err := db.ListPreAuthKeys(types.UserID(user.ID))
 	c.Assert(err, check.IsNil)
 	c.Assert(len(keys), check.Equals, 1)
 
 	// Make sure the User association is populated
-	c.Assert((keys)[0].User.Name, check.Equals, user.Name)
+	c.Assert((keys)[0].User.ID, check.Equals, user.ID)
 }
 
 func (*Suite) TestExpiredPreAuthKey(c *check.C) {
@@ -44,7 +45,7 @@ func (*Suite) TestExpiredPreAuthKey(c *check.C) {
 	c.Assert(err, check.IsNil)
 
 	now := time.Now().Add(-5 * time.Second)
-	pak, err := db.CreatePreAuthKey(user.Name, true, false, &now, nil)
+	pak, err := db.CreatePreAuthKey(types.UserID(user.ID), true, false, &now, nil)
 	c.Assert(err, check.IsNil)
 
 	key, err := db.ValidatePreAuthKey(pak.Key)
@@ -62,7 +63,7 @@ func (*Suite) TestValidateKeyOk(c *check.C) {
 	user, err := db.CreateUser("test3")
 	c.Assert(err, check.IsNil)
 
-	pak, err := db.CreatePreAuthKey(user.Name, true, false, nil, nil)
+	pak, err := db.CreatePreAuthKey(types.UserID(user.ID), true, false, nil, nil)
 	c.Assert(err, check.IsNil)
 
 	key, err := db.ValidatePreAuthKey(pak.Key)
@@ -74,7 +75,7 @@ func (*Suite) TestAlreadyUsedKey(c *check.C) {
 	user, err := db.CreateUser("test4")
 	c.Assert(err, check.IsNil)
 
-	pak, err := db.CreatePreAuthKey(user.Name, false, false, nil, nil)
+	pak, err := db.CreatePreAuthKey(types.UserID(user.ID), false, false, nil, nil)
 	c.Assert(err, check.IsNil)
 
 	node := types.Node{
@@ -96,7 +97,7 @@ func (*Suite) TestReusableBeingUsedKey(c *check.C) {
 	user, err := db.CreateUser("test5")
 	c.Assert(err, check.IsNil)
 
-	pak, err := db.CreatePreAuthKey(user.Name, true, false, nil, nil)
+	pak, err := db.CreatePreAuthKey(types.UserID(user.ID), true, false, nil, nil)
 	c.Assert(err, check.IsNil)
 
 	node := types.Node{
@@ -118,7 +119,7 @@ func (*Suite) TestNotReusableNotBeingUsedKey(c *check.C) {
 	user, err := db.CreateUser("test6")
 	c.Assert(err, check.IsNil)
 
-	pak, err := db.CreatePreAuthKey(user.Name, false, false, nil, nil)
+	pak, err := db.CreatePreAuthKey(types.UserID(user.ID), false, false, nil, nil)
 	c.Assert(err, check.IsNil)
 
 	key, err := db.ValidatePreAuthKey(pak.Key)
@@ -130,7 +131,7 @@ func (*Suite) TestExpirePreauthKey(c *check.C) {
 	user, err := db.CreateUser("test3")
 	c.Assert(err, check.IsNil)
 
-	pak, err := db.CreatePreAuthKey(user.Name, true, false, nil, nil)
+	pak, err := db.CreatePreAuthKey(types.UserID(user.ID), true, false, nil, nil)
 	c.Assert(err, check.IsNil)
 	c.Assert(pak.Expiration, check.IsNil)
 
@@ -147,7 +148,7 @@ func (*Suite) TestNotReusableMarkedAsUsed(c *check.C) {
 	user, err := db.CreateUser("test6")
 	c.Assert(err, check.IsNil)
 
-	pak, err := db.CreatePreAuthKey(user.Name, false, false, nil, nil)
+	pak, err := db.CreatePreAuthKey(types.UserID(user.ID), false, false, nil, nil)
 	c.Assert(err, check.IsNil)
 	pak.Used = true
 	db.DB.Save(&pak)
@@ -160,15 +161,15 @@ func (*Suite) TestPreAuthKeyACLTags(c *check.C) {
 	user, err := db.CreateUser("test8")
 	c.Assert(err, check.IsNil)
 
-	_, err = db.CreatePreAuthKey(user.Name, false, false, nil, []string{"badtag"})
+	_, err = db.CreatePreAuthKey(types.UserID(user.ID), false, false, nil, []string{"badtag"})
 	c.Assert(err, check.NotNil) // Confirm that malformed tags are rejected
 
 	tags := []string{"tag:test1", "tag:test2"}
 	tagsWithDuplicate := []string{"tag:test1", "tag:test2", "tag:test2"}
-	_, err = db.CreatePreAuthKey(user.Name, false, false, nil, tagsWithDuplicate)
+	_, err = db.CreatePreAuthKey(types.UserID(user.ID), false, false, nil, tagsWithDuplicate)
 	c.Assert(err, check.IsNil)
 
-	listedPaks, err := db.ListPreAuthKeys("test8")
+	listedPaks, err := db.ListPreAuthKeys(types.UserID(user.ID))
 	c.Assert(err, check.IsNil)
 	gotTags := listedPaks[0].Proto().GetAclTags()
 	sort.Sort(sort.StringSlice(gotTags))

hscontrol/db/routes_test.go

@@ -35,10 +35,10 @@ func (s *Suite) TestGetRoutes(c *check.C) {
 	user, err := db.CreateUser("test")
 	c.Assert(err, check.IsNil)
 
-	pak, err := db.CreatePreAuthKey(user.Name, false, false, nil, nil)
+	pak, err := db.CreatePreAuthKey(types.UserID(user.ID), false, false, nil, nil)
 	c.Assert(err, check.IsNil)
 
-	_, err = db.getNode("test", "test_get_route_node")
+	_, err = db.getNode(types.UserID(user.ID), "test_get_route_node")
 	c.Assert(err, check.NotNil)
 
 	route, err := netip.ParsePrefix("10.0.0.0/24")
@@ -79,10 +79,10 @@ func (s *Suite) TestGetEnableRoutes(c *check.C) {
 	user, err := db.CreateUser("test")
 	c.Assert(err, check.IsNil)
 
-	pak, err := db.CreatePreAuthKey(user.Name, false, false, nil, nil)
+	pak, err := db.CreatePreAuthKey(types.UserID(user.ID), false, false, nil, nil)
 	c.Assert(err, check.IsNil)
 
-	_, err = db.getNode("test", "test_enable_route_node")
+	_, err = db.getNode(types.UserID(user.ID), "test_enable_route_node")
 	c.Assert(err, check.NotNil)
 
 	route, err := netip.ParsePrefix(
@@ -153,10 +153,10 @@ func (s *Suite) TestIsUniquePrefix(c *check.C) {
 	user, err := db.CreateUser("test")
 	c.Assert(err, check.IsNil)
 
-	pak, err := db.CreatePreAuthKey(user.Name, false, false, nil, nil)
+	pak, err := db.CreatePreAuthKey(types.UserID(user.ID), false, false, nil, nil)
 	c.Assert(err, check.IsNil)
 
-	_, err = db.getNode("test", "test_enable_route_node")
+	_, err = db.getNode(types.UserID(user.ID), "test_enable_route_node")
 	c.Assert(err, check.NotNil)
 
 	route, err := netip.ParsePrefix(
@@ -234,10 +234,10 @@ func (s *Suite) TestDeleteRoutes(c *check.C) {
 	user, err := db.CreateUser("test")
 	c.Assert(err, check.IsNil)
 
-	pak, err := db.CreatePreAuthKey(user.Name, false, false, nil, nil)
+	pak, err := db.CreatePreAuthKey(types.UserID(user.ID), false, false, nil, nil)
 	c.Assert(err, check.IsNil)
 
-	_, err = db.getNode("test", "test_enable_route_node")
+	_, err = db.getNode(types.UserID(user.ID), "test_enable_route_node")
 	c.Assert(err, check.NotNil)
 
 	prefix, err := netip.ParsePrefix(

hscontrol/db/users.go

@@ -40,21 +40,21 @@ func CreateUser(tx *gorm.DB, name string) (*types.User, error) {
 	return &user, nil
 }
 
-func (hsdb *HSDatabase) DestroyUser(name string) error {
+func (hsdb *HSDatabase) DestroyUser(uid types.UserID) error {
 	return hsdb.Write(func(tx *gorm.DB) error {
-		return DestroyUser(tx, name)
+		return DestroyUser(tx, uid)
 	})
 }
 
 // DestroyUser destroys a User. Returns error if the User does
 // not exist or if there are nodes associated with it.
-func DestroyUser(tx *gorm.DB, name string) error {
+func DestroyUser(tx *gorm.DB, uid types.UserID) error {
-	user, err := GetUserByUsername(tx, name)
+	user, err := GetUserByID(tx, uid)
 	if err != nil {
-		return ErrUserNotFound
+		return err
 	}
 
-	nodes, err := ListNodesByUser(tx, name)
+	nodes, err := ListNodesByUser(tx, uid)
 	if err != nil {
 		return err
 	}
@@ -62,7 +62,7 @@ func DestroyUser(tx *gorm.DB, name string) error {
 		return ErrUserStillHasNodes
 	}
 
-	keys, err := ListPreAuthKeys(tx, name)
+	keys, err := ListPreAuthKeysByUser(tx, uid)
 	if err != nil {
 		return err
 	}
@@ -80,17 +80,17 @@ func DestroyUser(tx *gorm.DB, name string) error {
 	return nil
 }
 
-func (hsdb *HSDatabase) RenameUser(oldName, newName string) error {
+func (hsdb *HSDatabase) RenameUser(uid types.UserID, newName string) error {
 	return hsdb.Write(func(tx *gorm.DB) error {
-		return RenameUser(tx, oldName, newName)
+		return RenameUser(tx, uid, newName)
 	})
 }
 
 // RenameUser renames a User. Returns error if the User does
 // not exist or if another User exists with the new name.
-func RenameUser(tx *gorm.DB, oldName, newName string) error {
+func RenameUser(tx *gorm.DB, uid types.UserID, newName string) error {
 	var err error
-	oldUser, err := GetUserByUsername(tx, oldName)
+	oldUser, err := GetUserByID(tx, uid)
 	if err != nil {
 		return err
 	}
@@ -98,50 +98,25 @@ func RenameUser(tx *gorm.DB, oldName, newName string) error {
 	if err != nil {
 		return err
 	}
-	_, err = GetUserByUsername(tx, newName)
-	if err == nil {
-		return ErrUserExists
-	}
-	if !errors.Is(err, ErrUserNotFound) {
-		return err
-	}
 
 	oldUser.Name = newName
 
-	if result := tx.Save(&oldUser); result.Error != nil {
+	if err := tx.Save(&oldUser).Error; err != nil {
-		return result.Error
+		return err
 	}
 
 	return nil
 }
 
-func (hsdb *HSDatabase) GetUserByName(name string) (*types.User, error) {
+func (hsdb *HSDatabase) GetUserByID(uid types.UserID) (*types.User, error) {
 	return Read(hsdb.DB, func(rx *gorm.DB) (*types.User, error) {
-		return GetUserByUsername(rx, name)
+		return GetUserByID(rx, uid)
 	})
 }
 
-func GetUserByUsername(tx *gorm.DB, name string) (*types.User, error) {
+func GetUserByID(tx *gorm.DB, uid types.UserID) (*types.User, error) {
 	user := types.User{}
-	if result := tx.First(&user, "name = ?", name); errors.Is(
+	if result := tx.First(&user, "id = ?", uid); errors.Is(
-		result.Error,
-		gorm.ErrRecordNotFound,
-	) {
-		return nil, ErrUserNotFound
-	}
-
-	return &user, nil
-}
-
-func (hsdb *HSDatabase) GetUserByID(id types.UserID) (*types.User, error) {
-	return Read(hsdb.DB, func(rx *gorm.DB) (*types.User, error) {
-		return GetUserByID(rx, id)
-	})
-}
-
-func GetUserByID(tx *gorm.DB, id types.UserID) (*types.User, error) {
-	user := types.User{}
-	if result := tx.First(&user, "id = ?", id); errors.Is(
 		result.Error,
 		gorm.ErrRecordNotFound,
 	) {
@@ -169,54 +144,65 @@ func GetUserByOIDCIdentifier(tx *gorm.DB, id string) (*types.User, error) {
 	return &user, nil
 }
 
-func (hsdb *HSDatabase) ListUsers() ([]types.User, error) {
+func (hsdb *HSDatabase) ListUsers(where ...*types.User) ([]types.User, error) {
 	return Read(hsdb.DB, func(rx *gorm.DB) ([]types.User, error) {
-		return ListUsers(rx)
+		return ListUsers(rx, where...)
 	})
 }
 
 // ListUsers gets all the existing users.
-func ListUsers(tx *gorm.DB) ([]types.User, error) {
+func ListUsers(tx *gorm.DB, where ...*types.User) ([]types.User, error) {
+	if len(where) > 1 {
+		return nil, fmt.Errorf("expect 0 or 1 where User structs, got %d", len(where))
+	}
+
+	var user *types.User
+	if len(where) == 1 {
+		user = where[0]
+	}
+
 	users := []types.User{}
-	if err := tx.Find(&users).Error; err != nil {
+	if err := tx.Where(user).Find(&users).Error; err != nil {
 		return nil, err
 	}
 
 	return users, nil
 }
 
-// ListNodesByUser gets all the nodes in a given user.
+// GetUserByName returns a user if the provided username is
-func ListNodesByUser(tx *gorm.DB, name string) (types.Nodes, error) {
+// unique, and otherwise an error.
-	err := util.CheckForFQDNRules(name)
+func (hsdb *HSDatabase) GetUserByName(name string) (*types.User, error) {
-	if err != nil {
+	users, err := hsdb.ListUsers(&types.User{Name: name})
-		return nil, err
-	}
-	user, err := GetUserByUsername(tx, name)
 	if err != nil {
 		return nil, err
 	}
 
+	if len(users) != 1 {
+		return nil, fmt.Errorf("expected exactly one user, found %d", len(users))
+	}
+
+	return &users[0], nil
+}
+
+// ListNodesByUser gets all the nodes in a given user.
+func ListNodesByUser(tx *gorm.DB, uid types.UserID) (types.Nodes, error) {
 	nodes := types.Nodes{}
-	if err := tx.Preload("AuthKey").Preload("AuthKey.User").Preload("User").Where(&types.Node{UserID: user.ID}).Find(&nodes).Error; err != nil {
+	if err := tx.Preload("AuthKey").Preload("AuthKey.User").Preload("User").Where(&types.Node{UserID: uint(uid)}).Find(&nodes).Error; err != nil {
 		return nil, err
 	}
 
 	return nodes, nil
 }
 
-func (hsdb *HSDatabase) AssignNodeToUser(node *types.Node, username string) error {
+func (hsdb *HSDatabase) AssignNodeToUser(node *types.Node, uid types.UserID) error {
 	return hsdb.Write(func(tx *gorm.DB) error {
-		return AssignNodeToUser(tx, node, username)
+		return AssignNodeToUser(tx, node, uid)
 	})
 }
 
 // AssignNodeToUser assigns a Node to a user.
-func AssignNodeToUser(tx *gorm.DB, node *types.Node, username string) error {
+func AssignNodeToUser(tx *gorm.DB, node *types.Node, uid types.UserID) error {
-	err := util.CheckForFQDNRules(username)
+	user, err := GetUserByID(tx, uid)
-	if err != nil {
-		return err
-	}
-	user, err := GetUserByUsername(tx, username)
 	if err != nil {
 		return err
 	}

hscontrol/db/users_test.go

@@ -1,6 +1,8 @@
 package db
 
 import (
+	"strings"
+
 	"github.com/juanfont/headscale/hscontrol/types"
 	"github.com/juanfont/headscale/hscontrol/util"
 	"gopkg.in/check.v1"
@@ -17,24 +19,24 @@ func (s *Suite) TestCreateAndDestroyUser(c *check.C) {
 	c.Assert(err, check.IsNil)
 	c.Assert(len(users), check.Equals, 1)
 
-	err = db.DestroyUser("test")
+	err = db.DestroyUser(types.UserID(user.ID))
 	c.Assert(err, check.IsNil)
 
-	_, err = db.GetUserByName("test")
+	_, err = db.GetUserByID(types.UserID(user.ID))
 	c.Assert(err, check.NotNil)
 }
 
 func (s *Suite) TestDestroyUserErrors(c *check.C) {
-	err := db.DestroyUser("test")
+	err := db.DestroyUser(9998)
 	c.Assert(err, check.Equals, ErrUserNotFound)
 
 	user, err := db.CreateUser("test")
 	c.Assert(err, check.IsNil)
 
-	pak, err := db.CreatePreAuthKey(user.Name, false, false, nil, nil)
+	pak, err := db.CreatePreAuthKey(types.UserID(user.ID), false, false, nil, nil)
 	c.Assert(err, check.IsNil)
 
-	err = db.DestroyUser("test")
+	err = db.DestroyUser(types.UserID(user.ID))
 	c.Assert(err, check.IsNil)
 
 	result := db.DB.Preload("User").First(&pak, "key = ?", pak.Key)
@@ -44,7 +46,7 @@ func (s *Suite) TestDestroyUserErrors(c *check.C) {
 	user, err = db.CreateUser("test")
 	c.Assert(err, check.IsNil)
 
-	pak, err = db.CreatePreAuthKey(user.Name, false, false, nil, nil)
+	pak, err = db.CreatePreAuthKey(types.UserID(user.ID), false, false, nil, nil)
 	c.Assert(err, check.IsNil)
 
 	node := types.Node{
@@ -57,7 +59,7 @@ func (s *Suite) TestDestroyUserErrors(c *check.C) {
 	trx := db.DB.Save(&node)
 	c.Assert(trx.Error, check.IsNil)
 
-	err = db.DestroyUser("test")
+	err = db.DestroyUser(types.UserID(user.ID))
 	c.Assert(err, check.Equals, ErrUserStillHasNodes)
 }
 
@@ -70,24 +72,28 @@ func (s *Suite) TestRenameUser(c *check.C) {
 	c.Assert(err, check.IsNil)
 	c.Assert(len(users), check.Equals, 1)
 
-	err = db.RenameUser("test", "test-renamed")
+	err = db.RenameUser(types.UserID(userTest.ID), "test-renamed")
 	c.Assert(err, check.IsNil)
 
-	_, err = db.GetUserByName("test")
+	users, err = db.ListUsers(&types.User{Name: "test"})
-	c.Assert(err, check.Equals, ErrUserNotFound)
+	c.Assert(err, check.Equals, nil)
+	c.Assert(len(users), check.Equals, 0)
 
-	_, err = db.GetUserByName("test-renamed")
+	users, err = db.ListUsers(&types.User{Name: "test-renamed"})
 	c.Assert(err, check.IsNil)
+	c.Assert(len(users), check.Equals, 1)
 
-	err = db.RenameUser("test-does-not-exit", "test")
+	err = db.RenameUser(99988, "test")
 	c.Assert(err, check.Equals, ErrUserNotFound)
 
 	userTest2, err := db.CreateUser("test2")
 	c.Assert(err, check.IsNil)
 	c.Assert(userTest2.Name, check.Equals, "test2")
 
-	err = db.RenameUser("test2", "test-renamed")
+	err = db.RenameUser(types.UserID(userTest2.ID), "test-renamed")
-	c.Assert(err, check.Equals, ErrUserExists)
+	if !strings.Contains(err.Error(), "UNIQUE constraint failed") {
+		c.Fatalf("expected failure with unique constraint, got: %s", err.Error())
+	}
 }
 
 func (s *Suite) TestSetMachineUser(c *check.C) {
@@ -97,7 +103,7 @@ func (s *Suite) TestSetMachineUser(c *check.C) {
 	newUser, err := db.CreateUser("new")
 	c.Assert(err, check.IsNil)
 
-	pak, err := db.CreatePreAuthKey(oldUser.Name, false, false, nil, nil)
+	pak, err := db.CreatePreAuthKey(types.UserID(oldUser.ID), false, false, nil, nil)
 	c.Assert(err, check.IsNil)
 
 	node := types.Node{
@@ -111,15 +117,15 @@ func (s *Suite) TestSetMachineUser(c *check.C) {
 	c.Assert(trx.Error, check.IsNil)
 	c.Assert(node.UserID, check.Equals, oldUser.ID)
 
-	err = db.AssignNodeToUser(&node, newUser.Name)
+	err = db.AssignNodeToUser(&node, types.UserID(newUser.ID))
 	c.Assert(err, check.IsNil)
 	c.Assert(node.UserID, check.Equals, newUser.ID)
 	c.Assert(node.User.Name, check.Equals, newUser.Name)
 
-	err = db.AssignNodeToUser(&node, "non-existing-user")
+	err = db.AssignNodeToUser(&node, 9584849)
 	c.Assert(err, check.Equals, ErrUserNotFound)
 
-	err = db.AssignNodeToUser(&node, newUser.Name)
+	err = db.AssignNodeToUser(&node, types.UserID(newUser.ID))
 	c.Assert(err, check.IsNil)
 	c.Assert(node.UserID, check.Equals, newUser.ID)
 	c.Assert(node.User.Name, check.Equals, newUser.Name)

hscontrol/grpcv1.go

@@ -65,24 +65,34 @@ func (api headscaleV1APIServer) RenameUser(
 	ctx context.Context,
 	request *v1.RenameUserRequest,
 ) (*v1.RenameUserResponse, error) {
-	err := api.h.db.RenameUser(request.GetOldName(), request.GetNewName())
+	oldUser, err := api.h.db.GetUserByName(request.GetOldName())
 	if err != nil {
 		return nil, err
 	}
 
-	user, err := api.h.db.GetUserByName(request.GetNewName())
+	err = api.h.db.RenameUser(types.UserID(oldUser.ID), request.GetNewName())
 	if err != nil {
 		return nil, err
 	}
 
-	return &v1.RenameUserResponse{User: user.Proto()}, nil
+	newUser, err := api.h.db.GetUserByName(request.GetNewName())
+	if err != nil {
+		return nil, err
+	}
+
+	return &v1.RenameUserResponse{User: newUser.Proto()}, nil
 }
 
 func (api headscaleV1APIServer) DeleteUser(
 	ctx context.Context,
 	request *v1.DeleteUserRequest,
 ) (*v1.DeleteUserResponse, error) {
-	err := api.h.db.DestroyUser(request.GetName())
+	user, err := api.h.db.GetUserByName(request.GetName())
+	if err != nil {
+		return nil, err
+	}
+
+	err = api.h.db.DestroyUser(types.UserID(user.ID))
 	if err != nil {
 		return nil, err
 	}
@@ -131,8 +141,13 @@ func (api headscaleV1APIServer) CreatePreAuthKey(
 		}
 	}
 
+	user, err := api.h.db.GetUserByName(request.GetUser())
+	if err != nil {
+		return nil, err
+	}
+
 	preAuthKey, err := api.h.db.CreatePreAuthKey(
-		request.GetUser(),
+		types.UserID(user.ID),
 		request.GetReusable(),
 		request.GetEphemeral(),
 		&expiration,
@@ -168,7 +183,12 @@ func (api headscaleV1APIServer) ListPreAuthKeys(
 	ctx context.Context,
 	request *v1.ListPreAuthKeysRequest,
 ) (*v1.ListPreAuthKeysResponse, error) {
-	preAuthKeys, err := api.h.db.ListPreAuthKeys(request.GetUser())
+	user, err := api.h.db.GetUserByName(request.GetUser())
+	if err != nil {
+		return nil, err
+	}
+
+	preAuthKeys, err := api.h.db.ListPreAuthKeys(types.UserID(user.ID))
 	if err != nil {
 		return nil, err
 	}
@@ -406,10 +426,20 @@ func (api headscaleV1APIServer) ListNodes(
 	ctx context.Context,
 	request *v1.ListNodesRequest,
 ) (*v1.ListNodesResponse, error) {
+	// TODO(kradalby): it looks like this can be simplified a lot,
+	// the filtering of nodes by user, vs nodes as a whole can
+	// probably be done once.
+	// TODO(kradalby): This should be done in one tx.
+
 	isLikelyConnected := api.h.nodeNotifier.LikelyConnectedMap()
 	if request.GetUser() != "" {
+		user, err := api.h.db.GetUserByName(request.GetUser())
+		if err != nil {
+			return nil, err
+		}
+
 		nodes, err := db.Read(api.h.db.DB, func(rx *gorm.DB) (types.Nodes, error) {
-			return db.ListNodesByUser(rx, request.GetUser())
+			return db.ListNodesByUser(rx, types.UserID(user.ID))
 		})
 		if err != nil {
 			return nil, err
@@ -465,12 +495,18 @@ func (api headscaleV1APIServer) MoveNode(
 	ctx context.Context,
 	request *v1.MoveNodeRequest,
 ) (*v1.MoveNodeResponse, error) {
+	// TODO(kradalby): This should be done in one tx.
 	node, err := api.h.db.GetNodeByID(types.NodeID(request.GetNodeId()))
 	if err != nil {
 		return nil, err
 	}
 
-	err = api.h.db.AssignNodeToUser(node, request.GetUser())
+	user, err := api.h.db.GetUserByName(request.GetUser())
+	if err != nil {
+		return nil, err
+	}
+
+	err = api.h.db.AssignNodeToUser(node, types.UserID(user.ID))
 	if err != nil {
 		return nil, err
 	}

hscontrol/types/users.go

@@ -26,7 +26,7 @@ type User struct {
 
 	// Username for the user, is used if email is empty
 	// Should not be used, please use Username().
-	Name string `gorm:"index,uniqueIndex:idx_name_provider_identifier"`
+	Name string `gorm:"uniqueIndex:idx_name_provider_identifier,index"`
 
 	// Typically the full name of the user
 	DisplayName string