added passkey support (closes #6)

util/util.go

@@ -23,12 +23,19 @@ func GenerateSecret() string {
 	return base64.StdEncoding.EncodeToString(b)
 }
 func GenerateRefreshToken() (string, error) {
+	return GenerateOpaqueToken()
+}
+
+func GenerateOpaqueToken() (string, error) {
 	b := make([]byte, 32)
 	if _, err := rand.Read(b); err != nil {
 		return "", err
 	}
 	return base64.RawURLEncoding.EncodeToString(b), nil
 }
+func EncodeBase64URL(data []byte) string {
+	return base64.RawURLEncoding.EncodeToString(data)
+}
 func HashToken(token string) string {
 	hash := sha256.Sum256([]byte(token))
 	return hex.EncodeToString(hash[:])