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 usage string } func (c *cmd) init() { c.flags = flag.NewFlagSet("", flag.ContinueOnError) c.usage = flags.Usage(usage, c.flags, nil, nil) } 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 "Generates a new encryption key" } func (c *cmd) Help() string { return c.usage } const usage = `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.`