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package main | |
import ( | |
"fmt" | |
"github.com/chzyer/readline" | |
zxcvbn "github.com/nbutton23/zxcvbn-go" | |
) | |
const ( | |
Cyan = 36 | |
Green = 32 | |
Magenta = 35 | |
Red = 31 | |
Yellow = 33 | |
BackgroundRed = 41 | |
) | |
// Reset sequence | |
var ColorResetEscape = "\033[0m" | |
// ColorResetEscape translates a ANSI color number to a color escape. | |
func ColorEscape(color int) string { | |
return fmt.Sprintf("\033[0;%dm", color) | |
} | |
// Colorize the msg using ANSI color escapes | |
func Colorize(msg string, color int) string { | |
return ColorEscape(color) + msg + ColorResetEscape | |
} | |
func createStrengthPrompt(password []rune) string { | |
symbol, color := "", Red | |
strength := zxcvbn.PasswordStrength(string(password), nil) | |
switch { | |
case strength.Score <= 1: | |
symbol = "✗" | |
color = Red | |
case strength.Score <= 2: | |
symbol = "⚡" | |
color = Magenta | |
case strength.Score <= 3: | |
symbol = "⚠" | |
color = Yellow | |
case strength.Score <= 4: | |
symbol = "✔" | |
color = Green | |
} | |
prompt := Colorize(symbol, color) | |
if strength.Entropy > 0 { | |
entropy := fmt.Sprintf(" %3.0f", strength.Entropy) | |
prompt += Colorize(entropy, Cyan) | |
} else { | |
prompt += Colorize(" ENT", Cyan) | |
} | |
prompt += Colorize(" New Password: ", color) | |
return prompt | |
} | |
func main() { | |
rl, err := readline.New("") | |
if err != nil { | |
return | |
} | |
defer rl.Close() | |
setPasswordCfg := rl.GenPasswordConfig() | |
setPasswordCfg.SetListener(func(line []rune, pos int, key rune) (newLine []rune, newPos int, ok bool) { | |
rl.SetPrompt(createStrengthPrompt(line)) | |
rl.Refresh() | |
return nil, 0, false | |
}) | |
pswd, err := rl.ReadPasswordWithConfig(setPasswordCfg) | |
if err != nil { | |
return | |
} | |
fmt.Println("Your password was:", string(pswd)) | |
} |
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