func legacyDecodeSessionState()

in providers/session_state.go [120:160]

32 lines of code
8 McCabe index (conditional complexity)


func legacyDecodeSessionState(v string, c *cookie.Cipher) (*SessionState, error) {
	chunks := strings.Split(v, "|")

	if c == nil {
		if len(chunks) != 1 {
			return nil, fmt.Errorf("invalid session state (legacy: expected 1 chunk for plain got %d)", len(chunks))
		}
		return legacyDecodeSessionStatePlain(chunks[0])
	}

	if len(chunks) != 4 && len(chunks) != 5 {
		return nil, fmt.Errorf("invalid session state (legacy: expected 4 or 5 chunks for full got %d)", len(chunks))
	}

	i := 0
	ss, err := legacyDecodeSessionStatePlain(chunks[i])
	if err != nil {
		return nil, err
	}

	i++
	ss.AccessToken = chunks[i]

	if len(chunks) == 5 {
		// SessionState with IDToken in v3.1.0
		i++
		ss.IDToken = chunks[i]
	}

	i++
	ts, err := strconv.Atoi(chunks[i])
	if err != nil {
		return nil, fmt.Errorf("invalid session state (legacy: wrong expiration time: %s)", err)
	}
	ss.ExpiresOn = time.Unix(int64(ts), 0)

	i++
	ss.RefreshToken = chunks[i]

	return ss, nil
}