crypto-rand-seed-fixation.go

package main

import (
	"crypto/rand"
	"fmt"
	"strings"
)

func main() {
	// 1回目
	rand.Reader = strings.NewReader("random-seed-123-random-seed-123-random-seed-123") // seed固定

	r := make([]byte, 10)
	if _, err := rand.Read(r); err != nil {
		panic(err)
	}
	fmt.Printf("%x\n", r)

	// 2回目
	rand.Reader = strings.NewReader("random-seed-123-random-seed-123-random-seed-123") // seed固定

	r = make([]byte, 10)
	if _, err := rand.Read(r); err != nil {
		panic(err)
	}
	fmt.Printf("%x\n", r)
}