73 lines
1.7 KiB
Go
73 lines
1.7 KiB
Go
package main
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import (
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"context"
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"fmt"
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"net/http"
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"os"
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"time"
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"github.com/smallstep/certificates/ca"
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)
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func main() {
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if len(os.Args) != 2 {
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fmt.Fprintf(os.Stderr, "Usage: %s <token>\n", os.Args[0])
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os.Exit(1)
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}
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token := os.Args[1]
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// make sure to cancel the renew goroutine
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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srv, err := ca.BootstrapServer(ctx, token, &http.Server{
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Addr: ":8443",
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Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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name := "nobody"
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issuer := "none"
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if r.TLS != nil && len(r.TLS.PeerCertificates) > 0 {
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name = r.TLS.PeerCertificates[0].Subject.CommonName
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issuer = r.TLS.PeerCertificates[len(r.TLS.PeerCertificates)-1].Issuer.CommonName
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}
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w.Write([]byte(fmt.Sprintf("Hello %s (cert issued by '%s') at %s", name, issuer, time.Now().UTC())))
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}),
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}, ca.AddFederationToClientCAs(), ListTrustedRoots())
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if err != nil {
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panic(err)
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}
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fmt.Println("Listening on :8443 ...")
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if err := srv.ListenAndServeTLS("", ""); err != nil {
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panic(err)
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}
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}
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// ListTrustedRoots prints list of trusted roots for illustration purposes
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func ListTrustedRoots() ca.TLSOption {
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fn := func(ctx *ca.TLSOptionCtx) error {
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certs, err := ctx.Client.Federation()
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if err != nil {
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return err
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}
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roots, err := ctx.Client.Roots()
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if err != nil {
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return err
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}
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if len(certs.Certificates) > len(roots.Certificates) {
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fmt.Println("Server is using federated root certificates")
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}
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for _, cert := range certs.Certificates {
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fmt.Printf("Accepting certs anchored in %s\n", cert.Certificate.Subject)
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}
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return nil
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}
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return func(ctx *ca.TLSOptionCtx) error {
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ctx.OnRenewFunc = append(ctx.OnRenewFunc, fn)
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return fn(ctx)
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}
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}
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