package main

import (
	"crypto/aes"
	"sync"
)

func main() {
	N := 10000

	key := []byte{0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6, 0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c}
	in := []byte{0x32, 0x43, 0xf6, 0xa8, 0x88, 0x5a, 0x30, 0x8d, 0x31, 0x31, 0x98, 0xa2, 0xe0, 0x37, 0x07, 0x34}
	out := []byte{0x39, 0x25, 0x84, 0x1d, 0x02, 0xdc, 0x09, 0xfb, 0xdc, 0x11, 0x85, 0x97, 0x19, 0x6a, 0x0b, 0x32}

	c, err := aes.NewCipher(key)
	if err != nil {
		panic(err)
	}
	wg := sync.WaitGroup{}

	wg.Add(N)
	for j := 0; j < N; j++ {
		go func() {
			encrypted := make([]byte, len(in))
			c.Encrypt(encrypted, in)
			wg.Done()
		}()
	}
	wg.Wait()

	wg.Add(N)
	for j := 0; j < N; j++ {
		go func() {
			decrypted := make([]byte, len(in))
			c.Decrypt(decrypted, out)
			wg.Done()
		}()
	}
	wg.Wait()
}