Move to package

auth/auth.go

@@ -0,0 +1,36 @@
+package auth
+
+import "errors"
+
+// auth is a generic interface to implement password-based authentication and authorization
+type Auth interface {
+	Authenticate(user, pass string) (*User, error)
+	Authorize(user *User, topic string, perm Permission) error
+}
+
+type User struct {
+	Name string
+	Role Role
+}
+
+type Permission int
+
+const (
+	PermissionRead  = Permission(1)
+	PermissionWrite = Permission(2)
+)
+
+type Role string
+
+const (
+	RoleAdmin = Role("admin")
+	RoleUser  = Role("user")
+	RoleNone  = Role("none")
+)
+
+var Everyone = &User{
+	Name: "",
+	Role: RoleNone,
+}
+
+var ErrUnauthorized = errors.New("unauthorized")