/
cli.go
261 lines (229 loc) · 5.37 KB
/
cli.go
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package sslcerts
import (
"bufio"
"crypto/x509"
"crypto/x509/pkix"
"fmt"
"os"
"strings"
"github.com/urfave/cli/v2"
)
const version = "0.0.0"
const (
cliFlagCAName = "ca"
cliFlagCertName = "cert"
cliFlagInteractiveName = "interactive"
cliFlagKeyName = "key"
cliFlagOutName = "out"
cliDefaultKey = "certkey.pem"
cliDefaultPKey = "certpub.pem"
cliDefaultReq = "cert.csr"
cliDefaultCert = "cert.crt"
)
func Cli() *cli.App {
return &cli.App{
Name: "sslcerts",
Usage: "Generates ssl keys and certificates",
Version: version,
Commands: []*cli.Command{
{
Name: "key",
Usage: "Generates ssl private keys",
Flags: []cli.Flag{
cliFlagOut(cliDefaultKey, "Generated private key output file"),
},
Action: cliActionKey,
},
{
Name: "pkey",
Usage: "Generates ssl public keys",
Flags: []cli.Flag{
cliFlagKey(),
cliFlagOut(cliDefaultPKey, "Generated public key output file"),
},
Action: cliActionPKey,
},
{
Name: "req",
Usage: "Generates ssl certificate signing requests",
Flags: []cli.Flag{
cliFlagInteractive(),
cliFlagKey(),
cliFlagOut(cliDefaultReq, "Generated certificate signing request output file"),
},
Action: cliActionReq,
},
{
Name: "cert",
Usage: "Generates ssl certificate",
Flags: []cli.Flag{
&cli.BoolFlag{
Name: cliFlagCAName,
Usage: "Indicates this signing certificate is for a Certificate Authority",
},
cliFlagCert("Parent certificate to use. If empty then the certificate is self-signed"),
cliFlagKey(),
cliFlagOut(cliDefaultCert, "Generated certificate output file"),
},
Action: cliActionCert,
ArgsUsage: "<csr>...",
},
},
}
}
func cliActionKey(ctx *cli.Context) error {
oname := ctx.String(cliFlagOutName)
_, err := createPrivateKey(oname)
if err != nil {
return cli.Exit(err, 1)
}
return nil
}
func cliActionPKey(ctx *cli.Context) error {
kname := ctx.String(cliFlagKeyName)
oname := ctx.String(cliFlagOutName)
key, err := readCreatePrivateKey(kname)
if err != nil {
return cli.Exit(err, 1)
}
_, err = createPublicKey(oname, key)
if err != nil {
return cli.Exit(err, 1)
}
return nil
}
func cliActionReq(ctx *cli.Context) error {
kname := ctx.String(cliFlagKeyName)
oname := ctx.String(cliFlagOutName)
key, err := readCreatePrivateKey(kname)
if err != nil {
return cli.Exit(err, 1)
}
var subj pkix.Name
if ctx.NArg() > 0 {
cliParseSubj(ctx.Args().Slice(), &subj)
}
if ctx.Bool(cliFlagInteractiveName) {
cliInteractiveSubj(&subj)
}
fmt.Println(subj)
err = createCertificateRequest(oname, key, subj)
if err != nil {
return cli.Exit(err, 1)
}
return nil
}
func cliActionCert(ctx *cli.Context) error {
pcert := ctx.String(cliFlagCertName)
kname := ctx.String(cliFlagKeyName)
oname := ctx.String(cliFlagOutName)
ca := ctx.Bool(cliFlagCAName)
if ctx.NArg() == 0 {
return cli.Exit("no csr file provided", 1)
}
key, err := readCreatePrivateKey(kname)
if err != nil {
return cli.Exit(err, 1)
}
var cert *x509.Certificate
if pcert != "" {
cert, err = readCertificate(pcert)
if err != nil {
return cli.Exit(err, 1)
}
}
req, err := readCertificateRequest(ctx.Args().First())
if err != nil {
return cli.Exit(err, 1)
}
if err = req.CheckSignature(); err != nil {
return cli.Exit(err, 1)
}
err = createCertificate(oname, req, cert, key, ca)
if err != nil {
return cli.Exit(err, 1)
}
return nil
}
func cliFlagCert(usage string) cli.Flag {
return &cli.StringFlag{
Name: cliFlagCertName,
Usage: usage,
}
}
func cliFlagInteractive() cli.Flag {
return &cli.BoolFlag{
Name: cliFlagInteractiveName,
Aliases: []string{"i"},
Usage: "Allows to request extra info interactively",
}
}
func cliFlagKey() cli.Flag {
return &cli.StringFlag{
Name: cliFlagKeyName,
Value: cliDefaultKey,
Usage: "Private key to use. Generated if not exists",
}
}
func cliFlagOut(value, usage string) cli.Flag {
return &cli.StringFlag{
Name: cliFlagOutName,
Aliases: []string{"o"},
Value: value,
Usage: usage,
}
}
func cliInteractiveSubj(subj *pkix.Name) {
if len(subj.Country) == 0 {
promptSubj("Country Name (2 letter code)", &subj.Country)
}
if len(subj.Province) == 0 {
promptSubj("Province", &subj.Province)
}
if len(subj.Locality) == 0 {
promptSubj("Locality", &subj.Locality)
}
if len(subj.Organization) == 0 {
promptSubj("Organization", &subj.Organization)
}
if len(subj.OrganizationalUnit) == 0 {
promptSubj("Organizational Unit", &subj.OrganizationalUnit)
}
if len(subj.CommonName) == 0 {
v := prompt("Common Name (FQDN or your name)")
if v != "" {
subj.CommonName = v
}
}
}
func cliParseSubj(args []string, subj *pkix.Name) {
for _, arg := range args {
param := strings.Split(arg, "=")
switch param[0] {
case "C":
subj.Country = []string{param[1]}
case "CN":
subj.CommonName = param[1]
case "L":
subj.Locality = []string{param[1]}
case "O":
subj.Organization = []string{param[1]}
case "OU":
subj.OrganizationalUnit = []string{param[1]}
case "ST":
subj.Province = []string{param[1]}
}
}
}
func promptSubj(label string, subj *[]string) {
v := prompt(label)
if v != "" {
*subj = []string{v}
}
}
func prompt(label string) string {
fmt.Print(label + ": ")
s := bufio.NewReader(os.Stdin)
input, _ := s.ReadString('\n')
return strings.TrimSpace(input)
}