/**
* 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 =
SenderKeyStateStructure.Types.SenderMessageKey.CreateBuilder()
.SetIteration(senderMessageKey.getIteration())
.SetSeed(ByteString.CopyFrom(senderMessageKey.getSeed()))
.Build();
this.senderKeyStateStructure = this.senderKeyStateStructure.ToBuilder()
.AddSenderMessageKeys(senderMessageKeyStructure)
.Build();
}
public void addSenderMessageKey(SenderMessageKey senderMessageKey)
{
SenderKeyStateStructure.Types.SenderMessageKey senderMessageKeyStructure = new SenderKeyStateStructure.Types.SenderMessageKey
{
Iteration = senderMessageKey.getIteration(),
Seed = ByteString.CopyFrom(senderMessageKey.getSeed())
};
this.senderKeyStateStructure.SenderMessageKeys.Add(senderMessageKeyStructure);
if (senderKeyStateStructure.SenderMessageKeys.Count > MAX_MESSAGE_KEYS)
{
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();
}