SUID is a simple golang library that generates concise, unambiguous, URL-safe UUIDs.You can use it as your Private Password Generator!

suid.go

package suid

import (
	"fmt"
	"math/big"

	"github.com/google/uuid"
)

const (
	alphabet = "23456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz"
)

var (
	zero     = big.NewInt(0)
	zeronew  = big.NewInt(0)
	alphalen = big.NewInt(int64(len(alphabet)))
)

// SUID is short uuid, which is human readable and based on google/uuid (UUID V4) package unique id.
func SUID() string {
	uuid := uuid.New().String()
	var uuidb = []byte(uuid)
	nbyte := append([]byte{}, append(uuidb[0:8], append(uuidb[9:13], append(uuidb[14:18], append(uuidb[19:23], append(uuidb[24:28], uuidb[28:]...)...)...)...)...)...)
	bigi, ok := zero.SetString(string(nbyte), 16)
	if !ok {
		panic(fmt.Errorf("couldn't zero.SetString"))
	}
	var output []byte
	for bigi.Int64() != 0 {
		bign, digit := zeronew.DivMod(bigi, alphalen, new(big.Int))
		output = append(output, alphabet[digit.Int64()])
		bigi = bign
	}
	return string(output)
}