mirror of https://github.com/slackhq/nebula.git
79 lines
1.9 KiB
Go
79 lines
1.9 KiB
Go
package main
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import (
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"flag"
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"fmt"
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"io"
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"os"
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"github.com/slackhq/nebula/cert"
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)
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type keygenFlags struct {
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set *flag.FlagSet
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outKeyPath *string
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outPubPath *string
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curve *string
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}
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func newKeygenFlags() *keygenFlags {
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cf := keygenFlags{set: flag.NewFlagSet("keygen", flag.ContinueOnError)}
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cf.set.Usage = func() {}
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cf.outPubPath = cf.set.String("out-pub", "", "Required: path to write the public key to")
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cf.outKeyPath = cf.set.String("out-key", "", "Required: path to write the private key to")
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cf.curve = cf.set.String("curve", "25519", "ECDH Curve (25519, P256)")
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return &cf
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}
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func keygen(args []string, out io.Writer, errOut io.Writer) error {
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cf := newKeygenFlags()
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err := cf.set.Parse(args)
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if err != nil {
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return err
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}
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if err := mustFlagString("out-key", cf.outKeyPath); err != nil {
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return err
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}
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if err := mustFlagString("out-pub", cf.outPubPath); err != nil {
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return err
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}
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var pub, rawPriv []byte
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var curve cert.Curve
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switch *cf.curve {
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case "25519", "X25519", "Curve25519", "CURVE25519":
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pub, rawPriv = x25519Keypair()
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curve = cert.Curve_CURVE25519
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case "P256":
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pub, rawPriv = p256Keypair()
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curve = cert.Curve_P256
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default:
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return fmt.Errorf("invalid curve: %s", *cf.curve)
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}
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err = os.WriteFile(*cf.outKeyPath, cert.MarshalPrivateKey(curve, rawPriv), 0600)
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if err != nil {
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return fmt.Errorf("error while writing out-key: %s", err)
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}
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err = os.WriteFile(*cf.outPubPath, cert.MarshalPublicKey(curve, pub), 0600)
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if err != nil {
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return fmt.Errorf("error while writing out-pub: %s", err)
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}
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return nil
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}
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func keygenSummary() string {
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return "keygen <flags>: create a public/private key pair. the public key can be passed to `nebula-cert sign`"
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}
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func keygenHelp(out io.Writer) {
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cf := newKeygenFlags()
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out.Write([]byte("Usage of " + os.Args[0] + " " + keygenSummary() + "\n"))
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cf.set.SetOutput(out)
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cf.set.PrintDefaults()
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}
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