87 lines
1.9 KiB
Go
87 lines
1.9 KiB
Go
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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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"io/ioutil"
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"os"
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"github.com/slackhq/nebula/cert"
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"strings"
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"time"
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)
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type verifyFlags struct {
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set *flag.FlagSet
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caPath *string
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certPath *string
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}
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func newVerifyFlags() *verifyFlags {
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vf := verifyFlags{set: flag.NewFlagSet("verify", flag.ContinueOnError)}
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vf.set.Usage = func() {}
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vf.caPath = vf.set.String("ca", "", "Required: path to a file containing one or more ca certificates")
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vf.certPath = vf.set.String("crt", "", "Required: path to a file containing a single certificate")
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return &vf
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}
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func verify(args []string, out io.Writer, errOut io.Writer) error {
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vf := newVerifyFlags()
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err := vf.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("ca", vf.caPath); err != nil {
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return err
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}
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if err := mustFlagString("crt", vf.certPath); err != nil {
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return err
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}
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rawCACert, err := ioutil.ReadFile(*vf.caPath)
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if err != nil {
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return fmt.Errorf("error while reading ca: %s", err)
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}
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caPool := cert.NewCAPool()
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for {
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rawCACert, err = caPool.AddCACertificate(rawCACert)
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if err != nil {
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return fmt.Errorf("error while adding ca cert to pool: %s", err)
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}
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if rawCACert == nil || len(rawCACert) == 0 || strings.TrimSpace(string(rawCACert)) == "" {
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break
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}
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}
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rawCert, err := ioutil.ReadFile(*vf.certPath)
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if err != nil {
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return fmt.Errorf("unable to read crt; %s", err)
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}
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c, _, err := cert.UnmarshalNebulaCertificateFromPEM(rawCert)
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if err != nil {
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return fmt.Errorf("error while parsing crt: %s", err)
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}
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good, err := c.Verify(time.Now(), caPool)
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if !good {
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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 verifySummary() string {
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return "verify <flags>: verifies a certificate isn't expired and was signed by a trusted authority."
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}
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func verifyHelp(out io.Writer) {
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vf := newVerifyFlags()
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out.Write([]byte("Usage of " + os.Args[0] + " " + verifySummary() + "\n"))
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vf.set.SetOutput(out)
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vf.set.PrintDefaults()
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}
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