add basic passkey template

store.go

@@ -0,0 +1,73 @@
+package main
+
+import (
+	"crypto/rand"
+	"encoding/base64"
+
+	"github.com/go-webauthn/webauthn/webauthn"
+)
+
+type InMem struct {
+	// TODO: it would be nice to have a mutex here
+	// TODO: use pointers to avoid copying
+	users    map[string]PasskeyUser
+	sessions map[string]webauthn.SessionData
+
+	log Logger
+}
+
+func (i *InMem) GenSessionID() (string, error) {
+	b := make([]byte, 32)
+	_, err := rand.Read(b)
+	if err != nil {
+		return "", err
+	}
+
+	return base64.URLEncoding.EncodeToString(b), nil
+
+}
+
+func NewInMem(log Logger) *InMem {
+	return &InMem{
+		users:    make(map[string]PasskeyUser),
+		sessions: make(map[string]webauthn.SessionData),
+		log:      log,
+	}
+}
+
+func (i *InMem) GetSession(token string) (webauthn.SessionData, bool) {
+	i.log.Printf("[DEBUG] GetSession: %v", i.sessions[token])
+	val, ok := i.sessions[token]
+
+	return val, ok
+}
+
+func (i *InMem) SaveSession(token string, data webauthn.SessionData) {
+	i.log.Printf("[DEBUG] SaveSession: %s - %v", token, data)
+	i.sessions[token] = data
+}
+
+func (i *InMem) DeleteSession(token string) {
+	i.log.Printf("[DEBUG] DeleteSession: %v", token)
+	delete(i.sessions, token)
+}
+
+func (i *InMem) GetOrCreateUser(userName string) PasskeyUser {
+	i.log.Printf("[DEBUG] GetOrCreateUser: %v", userName)
+	if _, ok := i.users[userName]; !ok {
+		i.log.Printf("[DEBUG] GetOrCreateUser: creating new user: %v", userName)
+		i.users[userName] = &User{
+			ID:          []byte(userName),
+			DisplayName: userName,
+			Name:        userName,
+		}
+	}
+
+	return i.users[userName]
+}
+
+func (i *InMem) SaveUser(user PasskeyUser) {
+	i.log.Printf("[DEBUG] SaveUser: %v", user.WebAuthnName())
+	i.log.Printf("[DEBUG] SaveUser: %v", user)
+	i.users[user.WebAuthnName()] = user
+}