Random string generation

random.go

import (
 "crypto/rand" 
)

func GenerateRandomString(n int) string {
	b := make([]rune, n)
	letterRunes := []rune("abcdefghijklmnopqrstuvwxyz")
	for i := range b {
		// this error is ignored because it fails only when the 2nd arg of Int() is less then 0
		// which wont happen
		n, _ := rand.Int(rand.Reader, big.NewInt(int64(len(letterRunes))))
		b[i] = letterRunes[n.Int64()]
	}
	return string(b)
}