/**
* Encrypt a message.
*
* @param paddedPlaintext The plaintext message bytes, optionally padded.
* @return Ciphertext.
* @throws NoSessionException
*/
public byte[] Encrypt(byte[] paddedPlaintext)
{
lock (LOCK)
{
try
{
SenderKeyRecord record = senderKeyStore.LoadSenderKey(senderKeyId);
SenderKeyState senderKeyState = record.GetSenderKeyState();
SenderMessageKey senderKey = senderKeyState.GetSenderChainKey().GetSenderMessageKey();
byte[] ciphertext = GetCipherText(senderKey.GetIv(), senderKey.GetCipherKey(), paddedPlaintext);
SenderKeyMessage senderKeyMessage = new SenderKeyMessage(senderKeyState.GetKeyId(),
senderKey.GetIteration(),
ciphertext,
senderKeyState.GetSigningKeyPrivate());
senderKeyState.SetSenderChainKey(senderKeyState.GetSenderChainKey().GetNext());
senderKeyStore.StoreSenderKey(senderKeyId, record);
return(senderKeyMessage.Serialize());
}
catch (InvalidKeyIdException e)
{
throw new NoSessionException(e);
}
}
}
public void AddSenderMessageKey(SenderMessageKey senderMessageKey)
{
SenderKeyStateStructure.Types.SenderMessageKey senderMessageKeyStructure = new SenderKeyStateStructure.Types.SenderMessageKey
{
Iteration = senderMessageKey.GetIteration(),
Seed = ByteString.CopyFrom(senderMessageKey.GetSeed())
};
_senderKeyStateStructure.SenderMessageKeys.Add(senderMessageKeyStructure);
if (_senderKeyStateStructure.SenderMessageKeys.Count > MaxMessageKeys)
{
_senderKeyStateStructure.SenderMessageKeys.RemoveAt(0);
}
}
public void AddSenderMessageKey(SenderMessageKey senderMessageKey)
{
SenderKeyStateStructure.Types.SenderMessageKey senderMessageKeyStructure =
SenderKeyStateStructure.Types.SenderMessageKey.CreateBuilder()
.SetIteration(senderMessageKey.GetIteration())
.SetSeed(ByteString.CopyFrom(senderMessageKey.GetSeed()))
.Build();
SenderKeyStateStructure.Builder builder = this.senderKeyStateStructure.ToBuilder();
builder.AddSenderMessageKeys(senderMessageKeyStructure);
if (builder.SenderMessageKeysList.Count > MAX_MESSAGE_KEYS)
{
builder.SenderMessageKeysList.RemoveAt(0);
}
this.senderKeyStateStructure = builder.Build();
}
public void AddSenderMessageKey(SenderMessageKey senderMessageKey)
{
StorageProtos.SenderKeyStateStructure.Types.SenderMessageKey senderMessageKeyStructure =
StorageProtos.SenderKeyStateStructure.Types.SenderMessageKey.CreateBuilder()
.SetIteration(senderMessageKey.GetIteration())
.SetSeed(ByteString.CopyFrom(senderMessageKey.GetSeed()))
.Build();
StorageProtos.SenderKeyStateStructure.Builder builder = _senderKeyStateStructure.ToBuilder();
builder.AddSenderMessageKeys(senderMessageKeyStructure);
if (builder.SenderMessageKeysList.Count > MaxMessageKeys)
{
builder.SenderMessageKeysList.RemoveAt(0);
}
_senderKeyStateStructure = builder.Build();
}