private byte[] getPlaintext(uint version, MessageKeys messageKeys, byte[] cipherText)
{
try
{
if (version >= 3)
{
return(Decrypt.aesCbcPkcs5(cipherText, messageKeys.getCipherKey(), messageKeys.getIv()));
}
else
{
return(Decrypt.aesCtr(cipherText, messageKeys.getCipherKey(), messageKeys.getCounter()));
}
}
catch (Exception e)
{
throw new InvalidMessageException(e);
}
}
private byte[] getCiphertext(uint version, MessageKeys messageKeys, byte[] plaintext)
{
try
{
if (version >= 3)
{
return(Encrypt.aesCbcPkcs5(plaintext, messageKeys.getCipherKey(), messageKeys.getIv()));
}
else
{
return(Encrypt.aesCtr(plaintext, messageKeys.getCipherKey(), messageKeys.getCounter()));
}
}
catch (Exception e)
{
throw new Exception(e.Message);
}
}
private byte[] getCiphertext(uint version, MessageKeys messageKeys, byte[] plaintext)
{
try
{
if (version >= 3)
{
//cipher = getCipher(Cipher.ENCRYPT_MODE, messageKeys.getCipherKey(), messageKeys.getIv());
return(Encrypt.aesCbcPkcs5(plaintext, messageKeys.getCipherKey(), messageKeys.getIv()));
}
else
{
//cipher = getCipher(Cipher.ENCRYPT_MODE, messageKeys.getCipherKey(), messageKeys.getCounter());
return(Encrypt.aesCtr(plaintext, messageKeys.getCipherKey(), messageKeys.getCounter()));
}
}
catch (/*IllegalBlockSizeException | BadPadding*/ Exception e)
{
throw new Exception(e.Message);
}
}
private byte[] getPlaintext(uint version, MessageKeys messageKeys, byte[] cipherText)
{
try
{
//Cipher cipher;
if (version >= 3)
{
//cipher = getCipher(Cipher.DECRYPT_MODE, messageKeys.getCipherKey(), messageKeys.getIv());
return(Decrypt.aesCbcPkcs5(cipherText, messageKeys.getCipherKey(), messageKeys.getIv()));
}
else
{
//cipher = getCipher(Cipher.DECRYPT_MODE, messageKeys.getCipherKey(), messageKeys.getCounter())
return(Decrypt.aesCtr(cipherText, messageKeys.getCipherKey(), messageKeys.getCounter()));
}
}
catch (/*IllegalBlockSizeException | BadPadding*/ Exception e)
{
throw new InvalidMessageException(e);
}
}
public void setMessageKeys(ECPublicKey senderEphemeral, MessageKeys messageKeys)
{
Pair <Chain, uint> chainAndIndex = getReceiverChain(senderEphemeral);
Chain chain = chainAndIndex.first();
Chain.Types.MessageKey messageKeyStructure = new Chain.Types.MessageKey
{
CipherKey = ByteString.CopyFrom(messageKeys.getCipherKey()),
MacKey = ByteString.CopyFrom(messageKeys.getMacKey()),
Index = messageKeys.getCounter(),
Iv = ByteString.CopyFrom(messageKeys.getIv())
};
chain.MessageKeys.Add(messageKeyStructure);
if (chain.MessageKeys.Count > MAX_MESSAGE_KEYS)
{
chain.MessageKeys.RemoveAt(0);
}
sessionStructure.ReceiverChains[(int)chainAndIndex.second()] = chain;
}
public void setMessageKeys(ECPublicKey senderEphemeral, MessageKeys messageKeys)
{
Pair <Chain, uint> chainAndIndex = getReceiverChain(senderEphemeral);
Chain chain = chainAndIndex.first();
Chain.Types.MessageKey messageKeyStructure = Chain.Types.MessageKey.CreateBuilder()
.SetCipherKey(ByteString.CopyFrom(messageKeys.getCipherKey() /*.getEncoded()*/))
.SetMacKey(ByteString.CopyFrom(messageKeys.getMacKey() /*.getEncoded()*/))
.SetIndex(messageKeys.getCounter())
.SetIv(ByteString.CopyFrom(messageKeys.getIv() /*.getIV()*/))
.Build();
Chain updatedChain = chain.ToBuilder()
.AddMessageKeys(messageKeyStructure)
.Build();
this.sessionStructure = this.sessionStructure.ToBuilder()
.SetReceiverChains((int)chainAndIndex.second(), updatedChain) // TODO: conv
.Build();
}
public void setMessageKeys(ECPublicKey senderEphemeral, MessageKeys messageKeys)
{
Pair <Chain, uint> chainAndIndex = getReceiverChain(senderEphemeral);
Chain chain = chainAndIndex.first();
Chain.Types.MessageKey messageKeyStructure = Chain.Types.MessageKey.CreateBuilder()
.SetCipherKey(ByteString.CopyFrom(messageKeys.getCipherKey()))
.SetMacKey(ByteString.CopyFrom(messageKeys.getMacKey()))
.SetIndex(messageKeys.getCounter())
.SetIv(ByteString.CopyFrom(messageKeys.getIv()))
.Build();
Chain.Builder updatedChain = chain.ToBuilder().AddMessageKeys(messageKeyStructure);
if (updatedChain.MessageKeysList.Count > MAX_MESSAGE_KEYS)
{
updatedChain.MessageKeysList.RemoveAt(0);
}
sessionStructure = sessionStructure.ToBuilder()
.SetReceiverChains((int)chainAndIndex.second(), updatedChain.Build())
.Build();
}
private byte[] getPlaintext(MessageKeys messageKeys, byte[] cipherText)
{
return(Decrypt.aesCbcPkcs5(cipherText, messageKeys.getCipherKey(), messageKeys.getIv()));
}
private byte[] getCiphertext(MessageKeys messageKeys, byte[] plaintext)
{
return(Encrypt.aesCbcPkcs5(plaintext, messageKeys.getCipherKey(), messageKeys.getIv()));
}