142 lines
3.6 KiB
Go
142 lines
3.6 KiB
Go
package controller
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import (
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"crypto/ecdsa"
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"crypto/elliptic"
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cryptorand "crypto/rand"
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"crypto/tls"
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"crypto/x509"
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"crypto/x509/pkix"
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"encoding/pem"
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"errors"
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"fmt"
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"github.com/cirruslabs/orchard/internal/controller"
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"github.com/spf13/cobra"
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"math/big"
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"time"
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)
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var ErrInitFailed = errors.New("controller initialization failed")
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var controllerCertPath string
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var controllerKeyPath string
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var force bool
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func newInitCommand() *cobra.Command {
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command := &cobra.Command{
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Use: "init",
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Short: "Initialize the controller",
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RunE: runInit,
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}
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command.PersistentFlags().StringVar(&controllerCertPath, "controller-cert", "",
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"do not auto-generate the controller certificate, import it from the specified path instead"+
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" (requires --controller-key)")
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command.PersistentFlags().StringVar(&controllerKeyPath, "controller-key", "",
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"do not auto-generate the controller certificate key, import it from the specified path instead"+
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" (requires --controller-cert)")
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command.PersistentFlags().BoolVar(&force, "force", false,
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"force re-initialization if the controller is already initialized")
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return command
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}
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func runInit(cmd *cobra.Command, args []string) (err error) {
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var controllerCert tls.Certificate
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dataDir, err := controller.NewDataDir(dataDirPath)
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if err != nil {
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return err
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}
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initialized, err := dataDir.Initialized()
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if err != nil {
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return err
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}
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if initialized && !force {
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return fmt.Errorf("%w: controller is already initialized, preventing overwrite; "+
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"please specify \"--force\" to re-initialize", ErrInitFailed)
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}
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if controllerCertPath != "" || controllerKeyPath != "" {
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if err := checkBothCertAndKeyAreSpecified(); err != nil {
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return err
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}
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controllerCert, err = tls.LoadX509KeyPair(controllerCertPath, controllerCertPath)
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if err != nil {
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return err
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}
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} else {
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controllerCert, err = generateSelfSignedControllerCertificate()
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if err != nil {
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return err
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}
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}
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if err := dataDir.SetControllerCertificate(controllerCert); 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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func checkBothCertAndKeyAreSpecified() error {
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if controllerCertPath == "" {
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return fmt.Errorf("%w: when --controller-key is specified, --controller-cert must be specified too",
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ErrInitFailed)
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}
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if controllerKeyPath == "" {
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return fmt.Errorf("%w: when --controller-cert is specified, --controller-key must be specified too",
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ErrInitFailed)
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}
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return nil
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}
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func generateSelfSignedControllerCertificate() (tls.Certificate, error) {
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privateKey, err := ecdsa.GenerateKey(elliptic.P384(), cryptorand.Reader)
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if err != nil {
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return tls.Certificate{}, err
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}
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privateKeyBytes, err := x509.MarshalPKCS8PrivateKey(privateKey)
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if err != nil {
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return tls.Certificate{}, err
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}
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now := time.Now()
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cert := &x509.Certificate{
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SerialNumber: big.NewInt(0),
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Subject: pkix.Name{
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CommonName: "Orchard Controller",
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},
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NotBefore: now,
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NotAfter: now.AddDate(10, 0, 0),
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BasicConstraintsValid: true,
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KeyUsage: x509.KeyUsageDigitalSignature | x509.KeyUsageKeyEncipherment,
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ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth, x509.ExtKeyUsageServerAuth},
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DNSNames: []string{"orchard-controller"},
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}
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certBytes, err := x509.CreateCertificate(cryptorand.Reader, cert, cert, privateKey.Public(), privateKey)
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if err != nil {
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return tls.Certificate{}, err
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}
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certPEMBytes := pem.EncodeToMemory(&pem.Block{
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Type: "CERTIFICATE",
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Bytes: certBytes,
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})
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privateKeyPEMBytes := pem.EncodeToMemory(&pem.Block{
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Type: "PRIVATE KEY",
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Bytes: privateKeyBytes,
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})
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return tls.X509KeyPair(certPEMBytes, privateKeyPEMBytes)
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}
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