// LoadKeys loads and https key and cert from a directory. This is meant to be
// called from user-facing apps.
func LoadKeys(kdir string) *tao.Keys {
// TODO(kwalsh) merge x509 load/save code into keys.go
keys, err := tao.LoadOnDiskTaoSealedKeys(tao.Signing, tao.Parent(), kdir, tao.SealPolicyDefault)
options.FailIf(err, "can't load tao-sealed HTTPS/TLS keys")
chain := keys.CertChain("default")
verbose.Printf("Using existing certfificate chain of length %d:\n", len(chain))
for i, cert := range chain {
verbose.Printf(" Cert[%d] Subject: %s\n", i, x509txt.RDNString(cert.Subject))
}
return keys
}
func main() {
verbose.Set(true)
options.Parse()
profiling.ProfilePath = *options.String["profile"]
if !verbose.Enabled {
taoca.ConfirmNames = false
}
if *options.String["config"] != "" && !*options.Bool["init"] {
err := options.Load(*options.String["config"])
options.FailIf(err, "Can't load configuration")
}
fmt.Println("https/tls Certificate Authority")
manualMode = *options.Bool["manual"]
learnMode = *options.Bool["learn"]
if !manualMode && tao.Parent() == nil {
options.Fail(nil, "can't continue: automatic mode, but no host Tao available")
}
if *options.Bool["root"] == (*options.String["subsidiary"] != "") {
options.Usage("must supply exactly one of -root or -subsidiary options")
}
host := *options.String["host"]
port := *options.String["port"]
addr := net.JoinHostPort(host, port)
// TODO(kwalsh) extend tao name with operating mode and policy
cpath := *options.String["config"]
kdir := *options.String["keys"]
if kdir == "" && cpath != "" {
kdir = path.Dir(cpath)
} else if kdir == "" {
options.Fail(nil, "Option -keys or -config is required")
}
ppath := path.Join(kdir, "policy")
var err error
if *options.Bool["init"] {
if cpath != "" {
err := options.Save(cpath, "HTTPS/TLS certificate authority configuration", "persistent")
options.FailIf(err, "Can't save configuration")
}
fmt.Println("" +
"Initializing fresh HTTP/TLS CA signing key. Provide the following information,\n" +
"to be include in the CA's own x509 certificate. Leave the response blank to\n" +
"accept the default value.\n" +
"\n" +
"Configuration file: " + cpath + "\n" +
"Keys directory: " + kdir + "\n")
var caName *pkix.Name
if taoca.ConfirmNames {
if *options.Bool["root"] {
caName = taoca.ConfirmName(caRootName)
} else {
caName = taoca.ConfirmName(caSubsidiaryName)
}
} else {
if *options.Bool["root"] {
caName = caRootName
} else {
caName = caSubsidiaryName
}
}
if manualMode {
pwd := options.Password("Choose an HTTPS/TLS CA signing key password", "pass")
caKeys, err = tao.InitOnDiskPBEKeys(tao.Signing, pwd, kdir, caName)
tao.ZeroBytes(pwd)
} else {
caKeys, err = tao.InitOnDiskTaoSealedKeys(tao.Signing, caName, tao.Parent(), kdir, tao.SealPolicyDefault)
}
options.FailIf(err, "Can't initialize fresh HTTPS/TLS CA signing key")
if *options.Bool["root"] {
fmt.Printf(""+
"Note: To install this CA's key in the Chrome browser, go to\n"+
" 'Settings', 'Show advanced settings...', 'Manage Certificates...', 'Authorities'\n"+
" then import the following file:\n"+
" %s\n"+
" Select 'Trust this certificate for identifying websites' and/or other\n"+
" options, then click 'OK'\n", caKeys.X509Path("default"))
} else {
csr := taoca.NewCertificateSigningRequest(caKeys.VerifyingKey, caName)
*csr.IsCa = true
srv := *options.String["subsidiary"]
taoca.DefaultServerName = srv
taoca.SubmitAndInstall(caKeys, csr)
}
if !manualMode {
f, err := os.Open(ppath)
if err == nil {
f.Close()
fmt.Printf("Using existing certificate-granting policy: %s\n", ppath)
} else {
fmt.Printf("Creating default certificate-granting policy: %s\n", ppath)
fmt.Printf("Edit that file to define the certificate-granting policy.\n")
err := util.WritePath(ppath, []byte(policy.Default), 0755, 0755)
options.FailIf(err, "Can't save policy rules")
}
}
} else {
if manualMode {
pwd := options.Password("HTTPS/TLS CA signing key password", "pass")
caKeys, err = tao.LoadOnDiskPBEKeys(tao.Signing, pwd, kdir)
tao.ZeroBytes(pwd)
} else {
caKeys, err = tao.LoadOnDiskTaoSealedKeys(tao.Signing, tao.Parent(), kdir, tao.SealPolicyDefault)
}
options.FailIf(err, "Can't load HTTP/TLS CA signing key")
}
netlog.Log("https_ca: start")
netlog.Log("https_ca: manual? %v", manualMode)
if !manualMode {
guard, err = policy.Load(ppath)
options.FailIf(err, "Can't load certificate-granting policy")
}
var prin auth.Prin
if tao.Parent() != nil {
prin, err = tao.Parent().GetTaoName()
options.FailIf(err, "Can't get tao name")
} else {
rendezvous.DefaultServer.Connect(caKeys)
prin = caKeys.SigningKey.ToPrincipal()
}
name := *options.String["name"]
if name != "" {
err = rendezvous.Register(rendezvous.Binding{
Name: proto.String(name),
Host: proto.String(host),
Port: proto.String(port),
Protocol: proto.String("protoc/rpc/https_ca"),
Principal: proto.String(prin.String()),
})
options.FailIf(err, "Can't register with rendezvous service")
}
statsdelay := *options.String["stats"]
var srv *tao.Server
if statsdelay != "" {
go profiling.ShowStats(&stats, statsdelay, "sign certificates")
srv = tao.NewOpenServer(tao.ConnHandlerFunc(doResponseWithStats))
} else {
srv = tao.NewOpenServer(tao.ConnHandlerFunc(doResponseWithoutStats))
}
srv.Keys = caKeys
fmt.Printf("Listening at %s using Tao-authenticated channels\n", addr)
err = srv.ListenAndServe(addr)
options.FailIf(err, "server died")
fmt.Println("Server Done")
netlog.Log("https_ca: done")
}