func (ut *UserToken) DecodeToken(crypto *gokits.Crypto, token string) bool {
bs, err := base64.URLEncoding.DecodeString(token)
if err != nil {
return false
}
// decrypt
var tbs []byte
tbs, err = crypto.Decrypt(bs)
if err != nil {
log.Error("Decrypt failed ", err.Error())
return false
}
// check the len
if l := len(tbs); l != TokenLen {
log.Error("Invalid length ", l)
return false
}
ut.Flag = TokenFlag(tbs[0])
// remain bytes
buf := bytes.NewReader(tbs[1:])
// read uid
if err := binary.Read(buf, binary.BigEndian, &ut.Uid); err != nil {
log.Error("Read uid failed ", err.Error())
return false
}
// ip
ip := make([]byte, 4)
buf.Read(ip)
ut.ClientIP = net.IP(ip).String()
//log.Info("token ip ", ut.ClientIP)
// gen time
if err := binary.Read(buf, binary.BigEndian, &ut.GenTime); err != nil {
log.Error("Read generate time failed ", err.Error())
return false
}
// expire time
if err := binary.Read(buf, binary.BigEndian, &ut.Expire); err != nil {
log.Error("Read expire time failed ", err.Error())
return false
}
return true
}
