golang aes encryption
golang aes encryption
xxxxxxxxxxpackage mainimport ( "crypto/aes" "crypto/cipher" "crypto/rand" "encoding/hex" "errors" "fmt" "log" "golang.org/x/crypto/scrypt")var ( key []byte err error)func init() { secretKey := "2a688bc3f0e8ec1431402e9e4a1fb563" if len(secretKey) != 32 { err = errors.New("Secretkey length miss match") } key, err = scrypt.Key([]byte(secretKey), []byte("salt"), 1024, 8, 1, 32) if err != nil { log.Fatal(err) }}func AES256Encrypt(data string) ([]byte, error) { if err != nil { return nil, err } block, err := aes.NewCipher(key) if err != nil { return nil, err } gcm, err := cipher.NewGCM(block) if err != nil { return nil, err } nonce := make([]byte, gcm.NonceSize()) if _, err = rand.Read(nonce); err != nil { return nil, err } ciphertext := gcm.Seal(nonce, nonce, []byte(data), nil) return ciphertext, nil}func AES256Decrypt(cipherText []byte) ([]byte, error) { if err != nil { return nil, err } block, err := aes.NewCipher(key) if err != nil { return nil, err } gcm, err := cipher.NewGCM(block) if err != nil { return nil, err } nonceSize := gcm.NonceSize() if len(cipherText) < nonceSize { return nil, errors.New("Ciphertext too short") } nonce, ciphertext := cipherText[:nonceSize], cipherText[nonceSize:] plaintext, err := gcm.Open(nil, nonce, ciphertext, nil) if err != nil { return nil, err } return plaintext, nil}func main() { data := "Hello Wordl!" enc, err := AES256Encrypt(data) if err != nil { log.Fatal(err) } dec, err := AES256Decrypt(enc) if err != nil { log.Fatal(err) } fmt.Println("Cipher: ", hex.EncodeToString(enc)) fmt.Println("Cipher Text: ", string(dec))}Source: Grepper
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xxxxxxxxxxpackage mainimport ( "crypto/aes" "encoding/hex" "fmt")func main() { // cipher key key := "thisis32bitlongpassphraseimusing" // plaintext pt := "This is a secret" c := EncryptAES([]byte(key), pt) // plaintext fmt.Println(pt) // ciphertext fmt.Println(c) // decrypt DecryptAES([]byte(key), c)}func EncryptAES(key []byte, plaintext string) string { c, err := aes.NewCipher(key) CheckError(err) out := make([]byte, len(plaintext)) c.Encrypt(out, []byte(plaintext)) return hex.EncodeToString(out)}func DecryptAES(key []byte, ct string) { ciphertext, _ := hex.DecodeString(ct) c, err := aes.NewCipher(key) CheckError(err) pt := make([]byte, len(ciphertext)) c.Decrypt(pt, ciphertext) s := string(pt[:]) fmt.Println("DECRYPTED:", s)}func CheckError(err error) { if err != nil { panic(err) }}Source: golangdocs.com
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