/
main.go
46 lines (41 loc) · 1.09 KB
/
main.go
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package main
import (
"crypto/rand"
"encoding/ascii85"
"encoding/base64"
"errors"
"github.com/akamensky/argparse"
"os"
"strconv"
)
func main() {
// init parser
var parser = argparse.NewParser("passer", "A simple random password generator")
var encoding = parser.String("e", "encode", &argparse.Options{Help: "Encode type: a[scii85] or b[ase64]", Default: "b"})
var length = parser.Int("l", "length", &argparse.Options{Help: "Length of password", Default: 12, Validate: func(args []string) error {
if l, err := strconv.Atoi(args[0]); l < 6 || err != nil {
return errors.New("the length must be >= 6")
}
return nil
}})
// err massage
if err := parser.Parse(os.Args); err != nil {
println(parser.Usage(err))
return
}
// gen password
var buffer = make([]byte, *length)
if _, err := rand.Read(buffer); err == nil {
var outputs = make([]byte, *length*2)
switch (*encoding)[0] {
case 0x41, 0x61:
ascii85.Encode(outputs, buffer)
case 0x42, 0x62:
// as default
fallthrough
default:
base64.StdEncoding.Encode(outputs, buffer)
}
println(string(outputs[:*length]))
}
}