mirror of
https://github.com/gravitl/netmaker.git
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100 lines
3.1 KiB
Go
100 lines
3.1 KiB
Go
package functions
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import (
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"crypto/ed25519"
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"crypto/rand"
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"encoding/json"
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"errors"
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"net/http"
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"os"
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"github.com/gravitl/netmaker/logger"
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"github.com/gravitl/netmaker/netclient/config"
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"github.com/gravitl/netmaker/netclient/ncutils"
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"github.com/gravitl/netmaker/tls"
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)
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// Register - the function responsible for registering with the server and acquiring certs
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func Register(cfg *config.ClientConfig, key string) error {
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if cfg.Server.Server == "" {
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return errors.New("no server provided")
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}
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if cfg.Server.AccessKey == "" {
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return errors.New("no access key provided")
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}
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//generate new key if one doesn' exist
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var private *ed25519.PrivateKey
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var err error
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private, err = tls.ReadKey(ncutils.GetNetclientPath() + ncutils.GetSeparator() + "client.key")
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if err != nil {
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_, newKey, err := ed25519.GenerateKey(rand.Reader)
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if err != nil {
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return err
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}
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if err := tls.SaveKey(ncutils.GetNetclientPath(), ncutils.GetSeparator()+"client.key", newKey); err != nil {
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return err
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}
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private = &newKey
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}
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//check if cert exists
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_, err = tls.ReadCert(ncutils.GetNetclientServerPath(cfg.Server.Server) + ncutils.GetSeparator() + "client.pem")
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if errors.Is(err, os.ErrNotExist) {
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if err := RegisterWithServer(private, cfg); err != nil {
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return err
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}
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} else if err != nil {
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return err
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}
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return nil
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}
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// RegisterWithServer calls the register endpoint with privatekey and commonname - api returns ca and client certificate
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func RegisterWithServer(private *ed25519.PrivateKey, cfg *config.ClientConfig) error {
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cfg, err := config.ReadConfig(cfg.Network)
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if err != nil {
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return err
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}
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data := config.RegisterRequest{
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Key: *private,
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CommonName: tls.NewCName(cfg.Node.Name),
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}
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url := "https://" + cfg.Server.API + "/api/server/register"
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logger.Log(1, "register at "+url)
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token, err := Authenticate(cfg)
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if err != nil {
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return err
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}
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response, err := API(data, http.MethodPost, url, token)
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if err != nil {
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return err
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}
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if response.StatusCode != http.StatusOK {
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return errors.New(response.Status)
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}
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var resp config.RegisterResponse
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if err := json.NewDecoder(response.Body).Decode(&resp); err != nil {
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return errors.New("unmarshal cert error " + err.Error())
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}
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// set broker information on register
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cfg.Server.Server = resp.Broker
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cfg.Server.BrokerPort = resp.Port
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if err = config.Write(cfg, cfg.Node.Network); err != nil {
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logger.Log(0, "error overwriting config with broker information: "+err.Error())
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}
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//x509.Certificate.PublicKey is an interface so json encoding/decoding results in a string rather that []byte
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//the pubkeys are included in the response so the values in the certificate can be updated appropriately
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resp.CA.PublicKey = resp.CAPubKey
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resp.Cert.PublicKey = resp.CertPubKey
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if err := tls.SaveCert(ncutils.GetNetclientServerPath(cfg.Server.Server)+ncutils.GetSeparator(), "root.pem", &resp.CA); err != nil {
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return err
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}
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if err := tls.SaveCert(ncutils.GetNetclientServerPath(cfg.Server.Server)+ncutils.GetSeparator(), "client.pem", &resp.Cert); err != nil {
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return err
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}
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logger.Log(0, "certificates/key saved ")
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//join the network defined in the token
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return nil
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}
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