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main.go
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main.go
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// Command gokey is a vaultless password and key manager.
package main
import (
"bytes"
"flag"
"fmt"
"io"
"io/ioutil"
"log"
"os"
"strings"
"github.com/dannyfast/gokey"
"golang.org/x/term"
)
var (
pass, passFile, keyType, seedPath, realm, output string
unsafe bool
seedSkipCount, length int
)
func init() {
flag.StringVar(&pass, "p", "", "master password (if not specified, will be asked interactively)")
flag.StringVar(&passFile, "P", "", "master password file (if not specified, will be asked interactively)")
flag.StringVar(&keyType, "t", "pass", "output type (can be pass, seed, raw, ec256, ec384, ec521, rsa2048, rsa4096, x25519, ed25519)")
flag.StringVar(&seedPath, "s", "", "path to master seed file (optional)")
flag.IntVar(&seedSkipCount, "skip", 0, "number of bytes to skip from master seed file (default 0)")
flag.StringVar(&realm, "r", "", "password/key realm (most probably purpose of the password/key)")
flag.StringVar(&output, "o", "", "output path to store generated key/password (default stdout)")
flag.BoolVar(&unsafe, "u", false, "UNSAFE: allow key generation without a seed")
flag.IntVar(&length, "l", 10, `number of characters in the generated password or number of bytes in the generated raw stream (default 10 for "pass" type and 32 for "raw" type)`)
}
var keyTypes = map[string]gokey.KeyType{
"ec256": gokey.EC256,
"ec384": gokey.EC384,
"ec521": gokey.EC521,
"rsa2048": gokey.RSA2048,
"rsa4096": gokey.RSA4096,
"x25519": gokey.X25519,
"ed25519": gokey.ED25519,
}
func genSeed(w io.Writer) {
seed, err := gokey.GenerateEncryptedKeySeed(pass)
if err != nil {
log.Fatalln(err)
}
_, err = w.Write(seed)
if err != nil {
log.Fatalln(err)
}
}
func genPass(seed []byte, w io.Writer) {
password, err := gokey.GetPass(pass, realm, seed, &gokey.PasswordSpec{length, 3, 3, 1, 1, ""})
if err != nil {
log.Fatalln(err)
}
_, err = io.WriteString(w, password)
if err != nil {
log.Fatalln(err)
}
}
func genKey(seed []byte, w io.Writer) {
key, err := gokey.GetKey(pass, realm, seed, keyTypes[keyType], unsafe)
if err != nil {
log.Fatalln(err)
}
err = gokey.EncodeToPem(key, w)
if err != nil {
log.Fatalln(err)
}
}
func genRaw(seed []byte, w io.Writer) {
raw, err := gokey.GetRaw(pass, realm, seed, unsafe)
if err != nil {
log.Fatalln(err)
}
_, err = io.CopyN(w, raw, int64(length))
if err != nil {
log.Fatalln(err)
}
}
func isFlagSet(name string) bool {
found := false
flag.Visit(func(f *flag.Flag) {
if f.Name == name {
found = true
}
})
return found
}
func logFatal(format string, args ...interface{}) {
log.Printf(format, args...)
flag.PrintDefaults()
os.Exit(1)
}
func main() {
flag.Parse()
pass = os.Getenv("GOKEY_MASTER")
var err error
if pass == "" && passFile != "" {
var content []byte
content, err = ioutil.ReadFile(passFile)
if err != nil {
log.Fatalln(err)
}
pass = strings.TrimSpace(string(content[:]))
}
if pass == "" {
var passBytes []byte
var passBytesAgain []byte
for {
for len(passBytes) == 0 {
fmt.Fprint(os.Stderr, "Master password: ")
passBytes, err = term.ReadPassword(int(os.Stdin.Fd()))
if err != nil {
log.Fatalln(err)
}
fmt.Fprintln(os.Stderr, "")
}
if seedPath != "" {
break
}
fmt.Fprint(os.Stderr, "Master password again: ")
passBytesAgain, err = term.ReadPassword(int(os.Stdin.Fd()))
if err != nil {
log.Fatalln(err)
}
fmt.Fprintln(os.Stderr, "")
if bytes.Equal(passBytes, passBytesAgain) {
break
} else {
fmt.Fprintln(os.Stderr, "Passwords do not match. Try again.")
passBytes = nil
continue
}
}
pass = string(passBytes)
}
out := os.Stdout
if output != "" {
out, err = os.OpenFile(output, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0600)
if err != nil {
log.Fatalln(err)
}
defer out.Close()
}
if keyType == "seed" {
genSeed(out)
} else {
if realm == "" {
logFatal("no realm provided")
}
var seed []byte
if seedPath != "" {
seed, err = ioutil.ReadFile(seedPath)
if err != nil {
log.Fatalln(err)
}
if (seedSkipCount < 0) || (seedSkipCount >= len(seed)) {
log.Fatalln("invalid skip parameter")
}
seed = seed[seedSkipCount:]
}
switch keyType {
case "pass":
if length <= 0 {
logFatal("invalid length parameter")
}
genPass(seed, out)
fmt.Fprintln(os.Stderr, "")
case "raw":
if !isFlagSet("l") {
length = 32
}
if length <= 0 {
logFatal("invalid length parameter")
}
genRaw(seed, out)
default:
if _, ok := keyTypes[keyType]; !ok {
logFatal("unknown key type: %v", keyType)
}
if isFlagSet("l") {
logFatal("key type %v does not support length parameter", keyType)
}
genKey(seed, out)
}
}
}