support CAS identity provider

Signed-off-by: hongming <talonwan@yunify.com>

vendor/gopkg.in/cas.v2/memory_store.go

@@ -0,0 +1,60 @@
+package cas
+
+import (
+	"sync"
+)
+
+// MemoryStore implements the TicketStore interface storing ticket data in memory.
+type MemoryStore struct {
+	mu    sync.RWMutex
+	store map[string]*AuthenticationResponse
+}
+
+// Read returns the AuthenticationResponse for a ticket
+func (s *MemoryStore) Read(id string) (*AuthenticationResponse, error) {
+	s.mu.RLock()
+
+	if s.store == nil {
+		s.mu.RUnlock()
+		return nil, ErrInvalidTicket
+	}
+
+	t, ok := s.store[id]
+	s.mu.RUnlock()
+
+	if !ok {
+		return nil, ErrInvalidTicket
+	}
+
+	return t, nil
+}
+
+// Write stores the AuthenticationResponse for a ticket
+func (s *MemoryStore) Write(id string, ticket *AuthenticationResponse) error {
+	s.mu.Lock()
+
+	if s.store == nil {
+		s.store = make(map[string]*AuthenticationResponse)
+	}
+
+	s.store[id] = ticket
+
+	s.mu.Unlock()
+	return nil
+}
+
+// Delete removes the AuthenticationResponse for a ticket
+func (s *MemoryStore) Delete(id string) error {
+	s.mu.Lock()
+	delete(s.store, id)
+	s.mu.Unlock()
+	return nil
+}
+
+// Clear removes all ticket data
+func (s *MemoryStore) Clear() error {
+	s.mu.Lock()
+	s.store = nil
+	s.mu.Unlock()
+	return nil
+}