Function RandomStringWithAlphabet

tools/security/random.go:22–35

RandomStringWithAlphabet generates a cryptographically random string with the specified length and characters set. It panics if for some reason rand.Int returns a non-nil error.

(length int, alphabet string)

//
// It panics if for some reason rand.Int returns a non-nil error.
func RandomStringWithAlphabet(length int, alphabet string) string {
	b := make([]byte, length)
	max := big.NewInt(int64(len(alphabet)))

	for i := range b {
		n, err := cryptoRand.Int(cryptoRand.Reader, max)
		if err != nil {
			panic(err)
		}
		b[i] = alphabet[n.Int64()]
	}

	return string(b)
}

// PseudorandomString generates a pseudorandom string with the specified length.
//