зеркало из https://github.com/softlandia/Go.git
55 строки
1.2 KiB
Go
55 строки
1.2 KiB
Go
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// This program generates a password from a list of possible chars
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// You must provide a minimum length and a maximum length
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// This length is not fixed if you generate multiple passwords for the same range
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package main
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import (
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crand "crypto/rand"
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"fmt"
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"io"
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"math/rand"
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"time"
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)
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func generatePassword(minLength int, maxLength int) string {
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var chars = []byte("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!@#$%^&*()-_=+,.?/:;{}[]`~")
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var length = rand.Intn(maxLength-minLength) + minLength
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newPassword := make([]byte, length)
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randomData := make([]byte, length+(length/4))
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clen := byte(len(chars))
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maxrb := byte(256 - (256 % len(chars)))
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i := 0
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for {
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if _, err := io.ReadFull(crand.Reader, randomData); err != nil {
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panic(err)
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}
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for _, c := range randomData {
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if c >= maxrb {
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continue
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}
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newPassword[i] = chars[c%clen]
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i++
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if i == length {
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return string(newPassword)
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}
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}
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}
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}
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func main() {
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rand.Seed(time.Now().Unix())
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fmt.Print("Please specify a minimum length: ")
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var minLength int
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fmt.Scanf("%d", &minLength)
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fmt.Print("Please specify a maximum length: ")
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var maxLength int
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fmt.Scanf("%d", &maxLength)
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fmt.Printf("Your generated password is %v\n", generatePassword(minLength, maxLength))
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}
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