6cefe03359
The key generated from this command is used for gossip encrpytion, which utilizes AES GCM encryption. Using a key size of 16-bytes enables AES-128 while a key size of 32 bytes enables AES-256.
The underlying memberlist library supports the larger key size, and is ultimatley preferable from a security standpoint. Consul also uses 32 bytes by default: 1a14b94441
48 lines
1.1 KiB
Go
48 lines
1.1 KiB
Go
package command
|
|
|
|
import (
|
|
"crypto/rand"
|
|
"encoding/base64"
|
|
"fmt"
|
|
"strings"
|
|
)
|
|
|
|
// OperatorKeygenCommand is a Command implementation that generates an encryption
|
|
// key for use in `nomad agent`.
|
|
type OperatorKeygenCommand struct {
|
|
Meta
|
|
}
|
|
|
|
func (c *OperatorKeygenCommand) Synopsis() string {
|
|
return "Generates a new encryption key"
|
|
}
|
|
|
|
func (c *OperatorKeygenCommand) Help() string {
|
|
helpText := `
|
|
Usage: nomad operator keygen
|
|
|
|
Generates a new 32-byte 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.
|
|
`
|
|
return strings.TrimSpace(helpText)
|
|
}
|
|
|
|
func (c *OperatorKeygenCommand) Name() string { return "operator keygen" }
|
|
|
|
func (c *OperatorKeygenCommand) Run(_ []string) int {
|
|
key := make([]byte, 32)
|
|
n, err := rand.Reader.Read(key)
|
|
if err != nil {
|
|
c.Ui.Error(fmt.Sprintf("Error reading random data: %s", err))
|
|
return 1
|
|
}
|
|
if n != 32 {
|
|
c.Ui.Error(fmt.Sprintf("Couldn't read enough entropy. Generate more entropy!"))
|
|
return 1
|
|
}
|
|
|
|
c.Ui.Output(base64.StdEncoding.EncodeToString(key))
|
|
return 0
|
|
}
|