public AesManaged GetAesManaged()
{
if (aesManaged == null)
{
aesManaged = new AesManaged();
aesManaged.IV = KeySerializer.StringToByteArray(IV);
aesManaged.Key = KeySerializer.StringToByteArray(Key);
}
return(aesManaged);
}
public async Task <byte[]> GetCombinedSecret(List <IAuthenticatedShareHolder> authenticatedShareHolders, SecureString hsmSecret, int electionId)
{
using (var initializedHsm = await hsmFactory.GetHsm(hsmSecret))
{
var availableShares = new List <string>();
foreach (var shareHolder in authenticatedShareHolders)
{
var shares = DeserializeShares(await shareHolder.GetShares());
availableShares.AddRange(shares);
}
var combinedSecret = SecretCombiner.Combine(availableShares);
var byteArrayKey = KeySerializer.StringToByteArray(combinedSecret.RecoveredTextString);
var decryptedSecretKey = initializedHsm.Decrypt(centralDbRepository.GetMasterKeyHandle(electionId), byteArrayKey);
return(decryptedSecretKey);
}
}