func (s *networkServerRPC) ValidateContext(ctx context.Context) error {
md, ok := metadata.FromContext(ctx)
if !ok {
return errors.NewErrInternal("Could not get metadata from context")
}
var id, token string
if ids, ok := md["id"]; ok && len(ids) == 1 {
id = ids[0]
}
if id == "" {
return errors.NewErrInvalidArgument("Metadata", "id missing")
}
if tokens, ok := md["token"]; ok && len(tokens) == 1 {
token = tokens[0]
}
if token == "" {
return errors.NewErrInvalidArgument("Metadata", "token missing")
}
var claims *jwt.StandardClaims
claims, err := security.ValidateJWT(token, []byte(s.networkServer.(*networkServer).Identity.PublicKey))
if err != nil {
return err
}
if claims.Subject != id {
return errors.NewErrInvalidArgument("Metadata", "token was issued for a different component id")
}
return nil
}
// ValidateNetworkContext validates the context of a network request (router-broker, broker-handler, etc)
func (c *Component) ValidateNetworkContext(ctx context.Context) (component *pb_discovery.Announcement, err error) {
defer func() {
if err != nil {
time.Sleep(time.Second)
}
}()
md, ok := metadata.FromContext(ctx)
if !ok {
err = errors.NewErrInternal("Could not get metadata from context")
return
}
var id, serviceName, token string
if ids, ok := md["id"]; ok && len(ids) == 1 {
id = ids[0]
}
if id == "" {
err = errors.NewErrInvalidArgument("Metadata", "id missing")
return
}
if serviceNames, ok := md["service-name"]; ok && len(serviceNames) == 1 {
serviceName = serviceNames[0]
}
if serviceName == "" {
err = errors.NewErrInvalidArgument("Metadata", "service-name missing")
return
}
if tokens, ok := md["token"]; ok && len(tokens) == 1 {
token = tokens[0]
}
var announcement *pb_discovery.Announcement
announcement, err = c.Discover(serviceName, id)
if err != nil {
return
}
if announcement.PublicKey == "" {
return announcement, nil
}
if token == "" {
err = errors.NewErrInvalidArgument("Metadata", "token missing")
return
}
var claims *jwt.StandardClaims
claims, err = security.ValidateJWT(token, []byte(announcement.PublicKey))
if err != nil {
return
}
if claims.Issuer != id {
err = errors.NewErrInvalidArgument("Metadata", "token was issued by different component id")
return
}
return announcement, nil
}