randz

package main

import (
	"bytes"
	"fmt"
	"log"

	randz "github.com/kunitsucom/util.go/crypto/rand"
)

var ExampleReader = bytes.NewBufferString("" +
	"This is a test Reader for example. Please use crypto/rand's Reader in production." +
	"This is a test Reader for example. Please use crypto/rand's Reader in production." +
	"This is a test Reader for example. Please use crypto/rand's Reader in production." +
	"This is a test Reader for example. Please use crypto/rand's Reader in production." +
	"This is a test Reader for example. Please use crypto/rand's Reader in production." +
	"This is a test Reader for example. Please use crypto/rand's Reader in production." +
	"This is a test Reader for example. Please use crypto/rand's Reader in production." +
	"This is a test Reader for example. Please use crypto/rand's Reader in production." +
	"This is a test Reader for example. Please use crypto/rand's Reader in production." +
	"This is a test Reader for example. Please use crypto/rand's Reader in production." +
	"This is a test Reader for example. Please use crypto/rand's Reader in production." +
	"This is a test Reader for example. Please use crypto/rand's Reader in production.",
)

func main() {
	r := randz.NewReader(randz.WithRandomReader(ExampleReader))
	s, err := r.ReadString(128)
	if err != nil {
		log.Printf("(*randz.Reader).ReadString: %v", err)
		return
	}

	fmt.Printf("very secure random string: %s", s)
}

Output:

very secure random string: Wqr1gr1gjg2n12gUnjmn0gox0gn6jvyunugSunj1ng31ngl07y2xv0jwmn1gUnjmn0grwgy0xm3l2rxwuWqr1gr1gjg2n12gUnjmn0gox0gn6jvyunugSunj1ng31ngl