func randInt(n int64) int64 {
big, err := rand.Int(rand.Reader, big.NewInt(n))
if err != nil {
panic(err)
}
return big.Int64()
}
func randomTLD() (string, error) {
tlds := []string{"com", "org", "net"}
big, err := rand.Int(rand.Reader, big.NewInt(int64(len(tlds))))
if err != nil {
return "", err
}
return tlds[big.Int64()], nil
}
func (idgen *IdGen) OnKey(key string) {
results := keyRegex.FindAllStringSubmatch(key, 1)
if len(results) != 1 {
return
}
if len(results[0]) != 3 {
return
}
prefix := results[0][1]
big := big.NewInt(0)
big.SetString(results[0][2], 10)
id := uint64(big.Int64())
oldid := idgen.ids[prefix]
if id > oldid {
idgen.ids[prefix] = id
}
}
// generate generates a new password.
func (obj *PasswordRes) generate() (string, error) {
max := len(alphabet) - 1 // last index
output := ""
// FIXME: have someone verify this is cryptographically secure & correct
for i := uint16(0); i < obj.Length; i++ {
big, err := rand.Int(rand.Reader, big.NewInt(int64(max)))
if err != nil {
return "", errwrap.Wrapf(err, "could not generate password")
}
ix := big.Int64()
output += string(alphabet[ix])
}
if output == "" { // safety against empty passwords
return "", fmt.Errorf("password is empty")
}
if uint16(len(output)) != obj.Length { // safety against weird bugs
return "", fmt.Errorf("password length is too short") // bug!
}
return output, nil
}