Mercurial > gemma
view pkg/auth/session.go @ 616:51dc26b0f066
client: avoid extra password reveal button for IE/Edge
author | Bernhard Reiter <bernhard@intevation.de> |
---|---|
date | Tue, 11 Sep 2018 09:50:37 +0200 |
parents | e1466e65bc35 |
children | a244b18cb916 |
line wrap: on
line source
package auth import ( "encoding/base64" "errors" "io" "sync" "time" "gemma.intevation.de/gemma/pkg/common" "gemma.intevation.de/gemma/pkg/misc" ) type Roles []string type Session struct { ExpiresAt int64 `json:"expires"` User string `json:"user"` Roles Roles `json:"roles"` // private fields for managing expiration. access time.Time mu sync.Mutex } func (r Roles) Has(role string) bool { for _, x := range r { if x == role { return true } } return false } func (r Roles) HasAny(roles ...string) bool { for _, y := range roles { if r.Has(y) { return true } } return false } const ( sessionKeyLength = 20 maxTokenValid = time.Hour * 3 ) func NewSession(user, password string, roles Roles) *Session { // Create the Claims return &Session{ ExpiresAt: time.Now().Add(maxTokenValid).Unix(), User: user, Roles: roles, } } func (s *Session) serialize(w io.Writer) error { access, err := s.last().MarshalText() if err != nil { return err } wr := misc.BinWriter{w, nil} wr.WriteBin(s.ExpiresAt) wr.WriteString(s.User) wr.WriteBin(uint32(len(s.Roles))) for _, role := range s.Roles { wr.WriteString(role) } wr.WriteBin(uint32(len(access))) wr.WriteBin(access) return wr.Err } func (s *Session) deserialize(r io.Reader) error { var session Session var n uint32 rd := misc.BinReader{r, nil} rd.ReadBin(&session.ExpiresAt) rd.ReadString(&session.User) rd.ReadBin(&n) session.Roles = make(Roles, n) for i := uint32(0); n > 0 && i < n; i++ { rd.ReadString(&session.Roles[i]) } if rd.Err != nil { return rd.Err } var l uint32 rd.ReadBin(&l) access := make([]byte, l) rd.ReadBin(access) if rd.Err != nil { return rd.Err } var t time.Time if err := t.UnmarshalText(access); err != nil { return err } session.access = t *s = session return nil } func (c *Session) touch() { c.mu.Lock() c.access = time.Now() c.mu.Unlock() } func (c *Session) last() time.Time { c.mu.Lock() access := c.access c.mu.Unlock() return access } func GenerateSessionKey() string { return base64.URLEncoding.EncodeToString( common.GenerateRandomKey(sessionKeyLength)) } var ErrInvalidRole = errors.New("Invalid role") func GenerateSession(user, password string) (string, *Session, error) { roles, err := AllOtherRoles(user, password) if err != nil { return "", nil, err } if !roles.HasAny("sys_admin", "waterway_admin", "waterway_user") { return "", nil, ErrInvalidRole } token := GenerateSessionKey() session := NewSession(user, password, roles) Sessions.Add(token, session) return token, session, nil }