func TestEncryptAES_ECB_Manual(t *testing.T) {
key := "YELLOW SUBMARINE"
expectedHexCipher := "d1aa4f6578926542fbb6dd876cd20508"
expectedHexCipherPadding := "d1aa4f6578926542fbb6dd876cd20508be02542eda8a4ae9cd80e9ce20751237"
text := "YELLOW SUBMARINE"
textPadding := "YELLOW SUBMARINE!"
cipherText := EncryptAES_ECB_Manual(text, key)
cipherTextHex := secutils.BytesToHex(cipherText)
if expectedHexCipher != cipherTextHex {
t.Error("Test Encrypt AES_ECB Manually FAILED !")
}
fmt.Printf("3. Test EncryptAES_ECB_Manual: %s\n", cipherTextHex)
cipherTextPadding := EncryptAES_ECB_Manual(textPadding, key)
cipherTextHexPadding := secutils.BytesToHex(cipherTextPadding)
if expectedHexCipherPadding != cipherTextHexPadding {
t.Error("Test Encrypt AES_ECB Manually + PADDING FAILED !")
}
fmt.Printf("3. Test EncryptAES_ECB_Manual + PADDING: %s\n", cipherTextHexPadding)
}
func TestEncryptAES_CBC_Manual(t *testing.T) {
text := "YELLOW SUBMARINE"
key := "YELLOW SUBMARINE"
cipherTextBytes := EncryptAES_CBC_Manual(text, key)
cipherHex := secutils.BytesToHex(cipherTextBytes)
fmt.Printf("5. Test EncryptAES_CBC Manual: %s\n", cipherHex)
}
// THIS IS PROBABLY ONE OF THE BEST
func EncryptAES_CTR(plainText, key string) (string, error) {
keyBytes := secutils.ASCIIStringToBytes(key)
plaintextBytes := secutils.ASCIIStringToBytes(plainText)
block, err := aes.NewCipher(keyBytes)
if err != nil {
panic(err)
}
// The IV needs to be unique, but not secure. Therefore it's common to
// include it at the beginning of the ciphertextBytes.
ciphertextBytes := make([]byte, BlockSize+len(plaintextBytes))
iv := ciphertextBytes[:BlockSize]
if _, err := io.ReadFull(rand.Reader, iv); err != nil {
panic(err)
}
stream := cipher.NewCTR(block, iv)
stream.XORKeyStream(ciphertextBytes[BlockSize:], plaintextBytes)
hexCipherText := secutils.BytesToHex(ciphertextBytes)
return hexCipherText, nil
// CTR mode is the same for both encryption and decryption, so we can
// also decrypt that ciphertextBytes with NewCTR.
// plaintext2 := make([]byte, len(plaintextBytes))
// stream = cipher.NewCTR(block, iv)
// stream.XORKeyStream(plaintext2, ciphertextBytes[aes.BlockSize:])
}