public async Task <ActionResult <MainResponse> > CreateChat(CreateChatRequest request)
{
User user = HttpContext.GetUser();
if (user == null || user.KeySession == null)
{
return(Unauthorized());
}
int[] keyIds = request.EncryptedPayload.Select(p => p.KeyId).ToArray();
Chat chat = new Chat()
{
Id = RandomUtilities.GetCryptoRandomString(20),
EncryptionChatDatas = new List <EncryptionChatData>(),
Image = "",
LastMessageDate = DateTime.Now,
LastMessageId = null,
Messages = new List <Message>(),
};
_context.Chats.Add(chat);
await _context.SaveChangesAsync();
User[] users = await _context.Users.Where(p => keyIds.Contains(p.RSAKeyPair.Id)).ToArrayAsync();
EncryptionChatData[] encryptionChatDatas = new EncryptionChatData[users.Length + 1];
CreateChatEncryptedPayload encryptedPayload;
for (int i = 0; i < users.Length; i++)
{
encryptedPayload = request.EncryptedPayload.First(p => p.KeyId == users[i].RSAKeyPair.Id);
encryptionChatDatas[i] = new EncryptionChatData()
{
AESEncryptedKey = new AESEncryptedData(),
Chat = chat,
EncryptedTitle = new AESEncryptedData(),
KeyTransferPayload = encryptedPayload.PayLoad,
RSAEncryptedKey = encryptedPayload.EncryptedChatKey,
RSAKeyPair = users[i].RSAKeyPair
};
}
encryptionChatDatas[^ 1] = new EncryptionChatData()
public async Task <ActionResult <MainResponse> > ConfirmChat(ConfirmChatRequest request)
{
User user = HttpContext.GetUser();
if (user == null || user.KeySession == null)
{
return(Unauthorized());
}
Chat chat = await _context.Chats.FirstOrDefaultAsync(p => p.Id == request.ChatId);
if (chat == null)
{
return(MainResponse.GetError(Enums.RequestError.ChatNotFound));
}
EncryptionChatData encryptionChatData = chat.EncryptionChatDatas.FirstOrDefault(p => p.RSAKeyPair == user.RSAKeyPair);
if (encryptionChatData == null)
{
return(MainResponse.GetError(Enums.RequestError.ChatKeyNotFound));
}
encryptionChatData.KeySession = user.KeySession;
encryptionChatData.KeyTransferPayload = null;
encryptionChatData.RSAEncryptedKey = null;
encryptionChatData.SessionKeySign = request.SessionChatKeySign;
encryptionChatData.UserKeySign = request.UserChatKeySign;
encryptionChatData.AESEncryptedKey = request.EncryptedChatKey;
encryptionChatData.EncryptedTitle = request.EncryptedTitle;
_context.Entry(encryptionChatData).Reference(a => a.AESEncryptedKey).TargetEntry.State = EntityState.Modified;
_context.Entry(encryptionChatData).Reference(a => a.EncryptedTitle).TargetEntry.State = EntityState.Modified;
UserEvent userEvent = await _context.UserEvents.FirstOrDefaultAsync(p => p.Params.FirstOrDefault(p => p.Alias == "chatId").Value == chat.Id);
_context.UserEvents.Remove(userEvent);
await _context.SaveChangesAsync().ConfigureAwait(false);
return(MainResponse.GetSuccess());
}
public async Task <ActionResult <MainResponse> > UnconfirmedInfo(GetUnconfirmedChatInfoRequest request)
{
User user = HttpContext.GetUser();
if (user == null)
{
return(Unauthorized());
}
Chat chat = await _context.Chats.FirstOrDefaultAsync(p => p.Id == request.ChatId);
if (chat == null)
{
return(MainResponse.GetError(Enums.RequestError.ChatNotFound));
}
EncryptionChatData chatData = chat.EncryptionChatDatas.FirstOrDefault(p => p?.RSAKeyPair?.Id == user.RSAKeyPair.Id);
if (chatData == null)
{
return(MainResponse.GetError(Enums.RequestError.ChatKeyNotFound));
}
if (chatData.AESEncryptedKey != null)
{
return(MainResponse.GetError(Enums.RequestError.ChatAlreadyConfirmed));
}
GetUnconfirmedChatInfoResponse response = new GetUnconfirmedChatInfoResponse()
{
Payload = chatData.KeyTransferPayload,
RSAEncryptedChatKey = chatData.RSAEncryptedKey
};
return(MainResponse.GetSuccess(response));
}
