session: add NewSession to Store interface

For now, it makes no DB calls. But this is in prepartion for letting
this call persist a new session. This will also let us use a shared
`clock` for the time fields in a Session.

Author: ellemouton

session/interface.go

@@ -75,8 +75,8 @@ type Session struct {
 type MacaroonBaker func(ctx context.Context, rootKeyID uint64,
 	recipe *MacaroonRecipe) (string, error)
 
-// NewSession creates a new session with the given user-defined parameters.
-func NewSession(id ID, localPrivKey *btcec.PrivateKey, label string, typ Type,
+// buildSession creates a new session with the given user-defined parameters.
+func buildSession(id ID, localPrivKey *btcec.PrivateKey, label string, typ Type,
 	expiry time.Time, serverAddr string, devServer bool, perms []bakery.Op,
 	caveats []macaroon.Caveat, featureConfig FeaturesConfig,
 	privacy bool, linkedGroupID *ID, flags PrivacyFlags) (*Session, error) {
@@ -143,6 +143,18 @@ type IDToGroupIndex interface {
 // Store is the interface a persistent storage must implement for storing and
 // retrieving Terminal Connect sessions.
 type Store interface {
+	// NewSession creates a new session with the given user-defined
+	// parameters.
+	//
+	// NOTE: currently this purely a constructor of the Session type and
+	// does not make any database calls. This will be changed in a future
+	// commit.
+	NewSession(id ID, localPrivKey *btcec.PrivateKey, label string,
+		typ Type, expiry time.Time, serverAddr string, devServer bool,
+		perms []bakery.Op, caveats []macaroon.Caveat,
+		featureConfig FeaturesConfig, privacy bool, linkedGroupID *ID,
+		flags PrivacyFlags) (*Session, error)
+
 	// CreateSession adds a new session to the store. If a session with the
 	// same local public key already exists an error is returned. This
 	// can only be called with a Session with an ID that the Store has

session/store.go

@@ -8,6 +8,8 @@ import (
 
 	"github.com/btcsuite/btcd/btcec/v2"
 	"go.etcd.io/bbolt"
+	"gopkg.in/macaroon-bakery.v2/bakery"
+	"gopkg.in/macaroon.v2"
 )
 
 var (
@@ -60,6 +62,24 @@ func getSessionKey(session *Session) []byte {
 	return session.LocalPublicKey.SerializeCompressed()
 }
 
+// NewSession creates a new session with the given user-defined parameters.
+//
+// NOTE: currently this purely a constructor of the Session type and does not
+// make any database calls. This will be changed in a future commit.
+//
+// NOTE: this is part of the Store interface.
+func (db *DB) NewSession(id ID, localPrivKey *btcec.PrivateKey, label string,
+	typ Type, expiry time.Time, serverAddr string, devServer bool,
+	perms []bakery.Op, caveats []macaroon.Caveat,
+	featureConfig FeaturesConfig, privacy bool, linkedGroupID *ID,
+	flags PrivacyFlags) (*Session, error) {
+
+	return buildSession(
+		id, localPrivKey, label, typ, expiry, serverAddr, devServer,
+		perms, caveats, featureConfig, privacy, linkedGroupID, flags,
+	)
+}
+
 // CreateSession adds a new session to the store. If a session with the same
 // local public key already exists an error is returned.
 //

session/store_test.go

@@ -285,7 +285,7 @@ func newSession(t *testing.T, db Store, label string,
 	id, priv, err := db.GetUnusedIDAndKeyPair()
 	require.NoError(t, err)
 
-	session, err := NewSession(
+	session, err := buildSession(
 		id, priv, label, TypeMacaroonAdmin,
 		time.Date(99999, 1, 1, 0, 0, 0, 0, time.UTC),
 		"foo.bar.baz:1234", true, nil, nil, nil, true, linkedGroupID,

session/tlv_test.go

@@ -129,7 +129,7 @@ func TestSerializeDeserializeSession(t *testing.T) {
 			priv, id, err := NewSessionPrivKeyAndID()
 			require.NoError(t, err)
 
-			session, err := NewSession(
+			session, err := buildSession(
 				id, priv, test.name, test.sessType,
 				time.Date(99999, 1, 1, 0, 0, 0, 0, time.UTC),
 				"foo.bar.baz:1234", true, test.perms,
@@ -183,7 +183,7 @@ func TestGroupIDForOlderSessions(t *testing.T) {
 	priv, id, err := NewSessionPrivKeyAndID()
 	require.NoError(t, err)
 
-	session, err := NewSession(
+	session, err := buildSession(
 		id, priv, "test-session", TypeMacaroonAdmin,
 		time.Date(99999, 1, 1, 0, 0, 0, 0, time.UTC),
 		"foo.bar.baz:1234", true, nil, nil, nil, false, nil,
@@ -218,7 +218,7 @@ func TestGroupID(t *testing.T) {
 	require.NoError(t, err)
 
 	// Create session 1 which is not linked to any previous session.
-	session1, err := NewSession(
+	session1, err := buildSession(
 		id, priv, "test-session", TypeMacaroonAdmin,
 		time.Date(99999, 1, 1, 0, 0, 0, 0, time.UTC),
 		"foo.bar.baz:1234", true, nil, nil, nil, false, nil,
@@ -232,7 +232,7 @@ func TestGroupID(t *testing.T) {
 	// Create session 2 and link it to session 1.
 	priv, id, err = NewSessionPrivKeyAndID()
 	require.NoError(t, err)
-	session2, err := NewSession(
+	session2, err := buildSession(
 		id, priv, "test-session", TypeMacaroonAdmin,
 		time.Date(99999, 1, 1, 0, 0, 0, 0, time.UTC),
 		"foo.bar.baz:1234", true, nil, nil, nil, false,

session_rpcserver.go

@@ -321,7 +321,7 @@ func (s *sessionRpcServer) AddSession(ctx context.Context,
 		return nil, err
 	}
 
-	sess, err := session.NewSession(
+	sess, err := s.cfg.db.NewSession(
 		id, localPrivKey, req.Label, typ, expiry, req.MailboxServerAddr,
 		req.DevServer, uniquePermissions, caveats, nil, false, nil,
 		session.PrivacyFlags{},
@@ -1155,7 +1155,7 @@ func (s *sessionRpcServer) AddAutopilotSession(ctx context.Context,
 		return nil, err
 	}
 
-	sess, err := session.NewSession(
+	sess, err := s.cfg.db.NewSession(
 		id, localPrivKey, req.Label, session.TypeAutopilot, expiry,
 		req.MailboxServerAddr, req.DevServer, perms, caveats,
 		clientConfig, privacy, linkedGroupID, privacyFlags,