package protectString

import (
	"crypto/aes"
	"crypto/cipher"
	"crypto/rand"
	"encoding/hex"
	"fmt"
	"io"
)

func Encrypt(stringToEncrypt string, keyString string) (encryptedString string) {
	key, _ := hex.DecodeString(keyString)
	plaintext := []byte(stringToEncrypt)

	//Create a new Cipher Block from the key
	block, err := aes.NewCipher(key)
	if err != nil {
		panic(err.Error())
	}

	//Create a new GCM
	aesGCM, err := cipher.NewGCM(block)
	if err != nil {
		panic(err.Error())
	}

	//Create a nonce. Nonce should be from GCM
	nonce := make([]byte, aesGCM.NonceSize())
	if _, err = io.ReadFull(rand.Reader, nonce); err != nil {
		panic(err.Error())
	}

	//Encrypt the data using aesGCM.Seal
	ciphertext := aesGCM.Seal(nonce, nonce, plaintext, nil)
	return fmt.Sprintf("%x", ciphertext)
}