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package util
import (
"crypto/sha512"
"encoding/hex"
"math/rand"
"strings"
)
const domain = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
func CreateKey(len int) string {
// TODO: provided that CreateTripCode still uses sha512, the max len can be 128 at most.
if len > 128 {
panic("len is greater than 128") // awful way to do it
}
str := CreateTripCode(RandomID(len))
return str[:len]
}
func CreateTripCode(input string) string {
out := sha512.Sum512([]byte(input))
return hex.EncodeToString(out[:])
}
func RandomID(size int) string {
rng := size
newID := strings.Builder{}
for i := 0; i < rng; i++ {
newID.WriteByte(domain[rand.Intn(len(domain))])
}
return newID.String()
}
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