open-consul/command/keygen/keygen.go

66 lines
1.2 KiB
Go

package keygen
import (
"crypto/rand"
"encoding/base64"
"flag"
"fmt"
"github.com/hashicorp/consul/command/flags"
"github.com/mitchellh/cli"
)
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
}
func (c *cmd) init() {
c.flags = flag.NewFlagSet("", flag.ContinueOnError)
c.help = flags.Usage(help, c.flags)
}
func (c *cmd) Run(args []string) int {
if err := c.flags.Parse(args); err != nil {
return 1
}
key := make([]byte, 16)
n, err := rand.Reader.Read(key)
if err != nil {
c.UI.Error(fmt.Sprintf("Error reading random data: %s", err))
return 1
}
if n != 16 {
c.UI.Error(fmt.Sprintf("Couldn't read enough entropy. Generate more entropy!"))
return 1
}
c.UI.Output(base64.StdEncoding.EncodeToString(key))
return 0
}
func (c *cmd) Synopsis() string {
return synopsis
}
func (c *cmd) Help() string {
return c.help
}
const synopsis = "Generates a new encryption key"
const help = `
Usage: consul keygen
Generates a new encryption key that can be used to configure the
agent to encrypt traffic. The output of this command is already
in the proper format that the agent expects.
`