public SenderKeyDistributionMessage Create(SenderKeyName senderKeyName)
{
lock (GroupCipher.LOCK)
{
try {
var senderKeyRecord = _senderKeyStore.LoadSenderKey(senderKeyName);
if (senderKeyRecord.IsEmpty) {
senderKeyRecord.SetSenderKeyState((UInt32)KeyHelper.GenerateSenderKeyId(),
0,
KeyHelper.GenerateSenderKey(),
KeyHelper.GenerateSenderSigningKey());
_senderKeyStore.StoreSenderKey(senderKeyName, senderKeyRecord);
}
SenderKeyState state = senderKeyRecord.GetSenderKeyState();
return new SenderKeyDistributionMessage(state.KeyId,
state.SenderChainKey.Iteration,
state.SenderChainKey.Seed,
state.SigningKeyPublic);
} catch (Exception e) {
throw new Exception("GroupSessuinBuilder ex: " + e);
}
}
}
public void StoreSenderKey(SenderKeyName senderKeyName, SenderKeyRecord record)
{
if (store.ContainsKey (senderKeyName)) {
store [senderKeyName] = record;
} else {
store.Add (senderKeyName, record);
}
}
public SenderKeyRecord LoadSenderKey(SenderKeyName senderKeyName)
{
try {
if (store.ContainsKey(senderKeyName)) {
var record = store[senderKeyName];
return new SenderKeyRecord(record.Serialize());
} else {
return new SenderKeyRecord();
}
} catch (Exception e) {
throw new InvalidOperationException("Assertion error", e);
}
}
public void Process(SenderKeyName senderKeyName, SenderKeyDistributionMessage senderKeyDistributionMessage)
{
lock (GroupCipher.LOCK)
{
var senderKeyRecord = _senderKeyStore.LoadSenderKey(senderKeyName);
senderKeyRecord.AddSenderKeyState(senderKeyDistributionMessage.Id,
senderKeyDistributionMessage.Iteration,
senderKeyDistributionMessage.ChainKey,
senderKeyDistributionMessage.SignatureKey);
_senderKeyStore.StoreSenderKey(senderKeyName, senderKeyRecord);
}
}
public GroupCipher(ISenderKeyStore senderKeyStore, SenderKeyName senderKeyId)
{
_senderKeyStore = senderKeyStore;
_senderKeyId = senderKeyId;
}