public EncryptedData Encrypt(EncryptionStrength strength, string str)
{
if (string.IsNullOrWhiteSpace(str))
{
return(new EncryptedData {
IsEmpty = true
});
}
var hash = Hash(strength, str, false);
var ekey = _encryptionKey;
using (var aes = Aes.Create())
{
aes.Key = Convert.FromBase64String(ekey);
var encrypted = AesEncryption.EncryptStringToBytes_Aes(str, aes.Key, aes.IV);
var result = new byte[aes.IV.Length + encrypted.Length];
aes.IV.CopyTo(result, 0);
encrypted.CopyTo(result, 16);
return(new EncryptedData
{
IsEmpty = false,
Hash = hash,
Encrypted = Convert.ToBase64String(result)
});
}
}
public string Decrypt(string str)
{
byte[] ivPlusMessage = Convert.FromBase64String(str);
byte[] message = new byte[ivPlusMessage.Length - 16];
byte[] iv = new byte[16];
Array.ConstrainedCopy(ivPlusMessage, 0, iv, 0, 16);
Array.ConstrainedCopy(ivPlusMessage, 16, message, 0, ivPlusMessage.Length - 16);
var ekey = _encryptionKey;
var decrypted = AesEncryption.DecryptStringFromBytes_Aes(message, Convert.FromBase64String(ekey), iv);
return(decrypted);
}
