public InitializationResponse Initialize(int n, int t)
{
if (Health.Initialized)
{
return(null);
}
using (var aes = Aes.Create())
using (var tss = ThresholdSecretSharingAlgorithm.Create())
using (var sha = SHA512.Create())
{
aes.KeySize = 256;
aes.GenerateKey();
var rootKeyClear = aes.Key;
var rootKeyCrypt = tss.Split(rootKeyClear, n, t);
var rootKeyShares = tss.Shares.ToArray();
var rootToken = Guid.NewGuid();
var resp = new InitializationResponse
{
Keys = rootKeyShares.Select(x => BitConverter.ToString(x).Replace("-", "")).ToArray(),
KeysBase64 = rootKeyShares.Select(x => Convert.ToBase64String(x)).ToArray(),
RootToken = rootToken.ToString(),
};
try
{
State.Durable = new DurableServerState();
State.Durable.SecretShares = n;
State.Durable.SecretThreshold = t;
State.Durable.RootKeyTerm = 1;
State.Durable.RootKeyInstallTime = DateTime.UtcNow;
State.Durable.RootKeyEncrypted = rootKeyCrypt;
State.Durable.RootKeyHash = sha.ComputeHash(rootKeyClear);
State.Durable.RootTokenHash = sha.ComputeHash(rootToken.ToByteArray());
State.Durable.ClusterName = Settings.ClusterName;
State.Durable.ClusterId = Guid.NewGuid().ToString();
SaveState().Wait();
Health.Initialized = true;
return(resp);
}
catch
{
State.Durable = null;
throw;
}
}
}
private void Unseal(IEnumerable <byte[]> keys)
{
using (var tss = ThresholdSecretSharingAlgorithm.Create())
using (var sha = SHA512.Create())
{
tss.Shares = keys;
var rootKeyClear = tss.Combine(State.Durable.RootKeyEncrypted);
var rootKeyHash = sha.ComputeHash(rootKeyClear);
if (BitConverter.ToString(rootKeyHash) != BitConverter.ToString(State.Durable.RootKeyHash))
{
// TODO: verify the response in this case
throw new InvalidDataException("Invalid keys!");
}
State.RootKey = rootKeyClear;
}
}