Encrypt and Decrypt Using AES In Golang - Getting Started with Golang
In this Getting Started with Golang, we will learn how to use Encrypt and Decrypt any classified text or message using the package AES implements AES encryption (formerly Rijndael), as defined in U.S. Federal Information Processing Standards Publication 197 with step by step guide in Golang programming language.
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Source Codes:
package main
import (
"crypto/aes"
"crypto/cipher"
"encoding/base64"
"fmt"
"github.com/itrepablik/itrlog"
)
// Initialize victor, which is the random bytes
var iv = []byte{35, 46, 57, 24, 85, 35, 24, 74, 87, 35, 88, 98, 66, 32, 14, 05}
// Keep this secret key with you.
const secretKey string = "abc&1*~#^2^#s0^=)^^7%b34"
func encodeBase64(b []byte) string {
return base64.StdEncoding.EncodeToString(b)
}
func decodeBase64(s string) []byte {
data, err := base64.StdEncoding.DecodeString(s)
if err != nil {
panic(err)
}
return data
}
// Encrypt method is to encrypt or hide any classified text
func Encrypt(text, secretKey string) (string, error) {
block, err := aes.NewCipher([]byte(secretKey))
if err != nil {
return "", err
}
plainText := []byte(text)
cfb := cipher.NewCFBEncrypter(block, iv)
cipherText := make([]byte, len(plainText))
cfb.XORKeyStream(cipherText, plainText)
return encodeBase64(cipherText), nil
}
// Decrypt method is to extract back the encrypted text
func Decrypt(text, secretKey string) (string, error) {
block, err := aes.NewCipher([]byte(secretKey))
if err != nil {
return "", err
}
cipherText := decodeBase64(text)
cfb := cipher.NewCFBDecrypter(block, iv)
plainText := make([]byte, len(cipherText))
cfb.XORKeyStream(plainText, cipherText)
return string(plainText), nil
}
func main() {
fmt.Println("Hello Maharlikans!")
phrase := "Hello World!"
// To encrypt the phrase
encText, err := Encrypt(phrase, secretKey)
if err != nil {
itrlog.Fatalw("error encrypting your classified text: ", err)
}
fmt.Println("encrypted text: ", encText)
// To decrypt the original phrase
decText, err := Decrypt("IyVL7wcMdPcTbsuy", secretKey)
if err != nil {
itrlog.Fatalw("error decrypting your encrypted text: ", err)
}
fmt.Println("decrypted text: ", decText)
}
