mirror of https://github.com/hashicorp/consul
115 lines
3.6 KiB
Go
115 lines
3.6 KiB
Go
package create
|
|
|
|
import (
|
|
"flag"
|
|
"fmt"
|
|
|
|
"github.com/mitchellh/cli"
|
|
|
|
"github.com/hashicorp/consul/command/flags"
|
|
"github.com/hashicorp/consul/command/tls"
|
|
"github.com/hashicorp/consul/lib/file"
|
|
"github.com/hashicorp/consul/tlsutil"
|
|
)
|
|
|
|
func New(ui cli.Ui) *cmd {
|
|
c := &cmd{UI: ui}
|
|
c.init()
|
|
return c
|
|
}
|
|
|
|
type cmd struct {
|
|
UI cli.Ui
|
|
flags *flag.FlagSet
|
|
help string
|
|
days int
|
|
domain string
|
|
clusterID string
|
|
constraint bool
|
|
commonName string
|
|
additionalConstraints flags.AppendSliceValue
|
|
}
|
|
|
|
func (c *cmd) init() {
|
|
c.flags = flag.NewFlagSet("", flag.ContinueOnError)
|
|
// TODO: perhaps add a -years arg to better capture user intent given that leap years are a thing
|
|
c.flags.IntVar(&c.days, "days", 1825, "Number of days the CA is valid for. Defaults to 1825 days (approximately 5 years).")
|
|
c.flags.BoolVar(&c.constraint, "name-constraint", false, "Enables X.509 name constraints for the CA. "+
|
|
"If used, the CA only signs certificates for localhost and the domains specified by -domain and -additional-name-constraint. "+
|
|
"If Consul's UI is served over HTTPS in your deployment, add its DNS name with -additional-constraint. Defaults to false.")
|
|
c.flags.StringVar(&c.domain, "domain", "consul", "The DNS domain of the Consul cluster that agents are configured with. "+
|
|
"Defaults to consul. Only used when -name-constraint is set. "+
|
|
"Additional domains can be passed with -additional-name-constraint.")
|
|
c.flags.StringVar(&c.clusterID, "cluster-id", "", "ID of the Consul cluster. Sets the CA's URI with the SPIFFEID composed of the cluster ID and domain (specified by -domain or 'consul' by default).")
|
|
c.flags.StringVar(&c.commonName, "common-name", "", "Common Name of CA. Defaults to Consul Agent CA.")
|
|
c.flags.Var(&c.additionalConstraints, "additional-name-constraint", "Add name constraints for the CA. Results in rejecting certificates "+
|
|
"for other DNS than specified. Can be used multiple times. Only used in combination with -name-constraint.")
|
|
c.help = flags.Usage(help, c.flags)
|
|
}
|
|
|
|
func (c *cmd) Run(args []string) int {
|
|
if err := c.flags.Parse(args); err != nil {
|
|
if err == flag.ErrHelp {
|
|
return 0
|
|
}
|
|
c.UI.Error(fmt.Sprintf("Failed to parse args: %v", err))
|
|
return 1
|
|
}
|
|
|
|
certFileName := fmt.Sprintf("%s-agent-ca.pem", c.domain)
|
|
pkFileName := fmt.Sprintf("%s-agent-ca-key.pem", c.domain)
|
|
|
|
if !(tls.FileDoesNotExist(certFileName)) {
|
|
c.UI.Error(certFileName + " already exists.")
|
|
return 1
|
|
}
|
|
if !(tls.FileDoesNotExist(pkFileName)) {
|
|
c.UI.Error(pkFileName + " already exists.")
|
|
return 1
|
|
}
|
|
|
|
constraints := []string{}
|
|
if c.constraint {
|
|
constraints = append(c.additionalConstraints, []string{c.domain, "localhost"}...)
|
|
}
|
|
|
|
ca, pk, err := tlsutil.GenerateCA(tlsutil.CAOpts{Name: c.commonName, Days: c.days, Domain: c.domain, PermittedDNSDomains: constraints, ClusterID: c.clusterID})
|
|
if err != nil {
|
|
c.UI.Error(err.Error())
|
|
return 1
|
|
}
|
|
|
|
if err := file.WriteAtomicWithPerms(certFileName, []byte(ca), 0755, 0666); err != nil {
|
|
c.UI.Error(err.Error())
|
|
return 1
|
|
}
|
|
c.UI.Output("==> Saved " + certFileName)
|
|
|
|
if err := file.WriteAtomicWithPerms(pkFileName, []byte(pk), 0755, 0600); err != nil {
|
|
c.UI.Error(err.Error())
|
|
return 1
|
|
}
|
|
c.UI.Output("==> Saved " + pkFileName)
|
|
|
|
return 0
|
|
}
|
|
|
|
func (c *cmd) Synopsis() string {
|
|
return synopsis
|
|
}
|
|
|
|
func (c *cmd) Help() string {
|
|
return c.help
|
|
}
|
|
|
|
const synopsis = "Create a new consul CA"
|
|
const help = `
|
|
Usage: consul tls ca create [options]
|
|
|
|
Create a new consul CA:
|
|
|
|
$ consul tls ca create
|
|
==> saved consul-agent-ca.pem
|
|
==> saved consul-agent-ca-key.pem
|
|
`
|