public async Task <CreateFirstMessangerSessionResponse> MakeFirstSessionAsync(CreateMessangerSessionRequest model,
string userId,
string sessionId)
{
var savedSessions = await sessionProvider.GetModelBySearchPredicate(x => x.SessionId == sessionId &&
x.UserId == userId);
if (savedSessions != null)
{
throw new ApiError(new ServerException("This session is alredy exist"));
}
var serverKeys = rsaCypher.GenerateKeys();
var user = await userManager.Users.FirstOrDefaultAsync(x => x.Id == userId);
var serverSession = new Session()
{
ClientPublicKey = model.PublicKey,
ServerPrivateKey = serverKeys.privateKey,
ServerPublicKey = serverKeys.publicKey,
SessionId = sessionId,
UserId = userId
};
var savedStrongKey = await strongKeyProvider.GetModelBySearchPredicate(x => x.UserId == userId);
if (savedStrongKey != null)
{
var savedCypher = await cypherProvider.GetModelBySearchPredicate(x => x.Id == savedStrongKey.CypherId);
await sessionProvider.CreateOrUpdateAsync(serverSession);
return(new CreateFirstMessangerSessionResponse()
{
ServerPublicKey = serverKeys.publicKey,
CryptedAes = rsaCypher.Crypt(model.PublicKey, savedCypher.Secret.ToUrlSafeBase64())
});
}
else
{
await using (var transaction = await transactionProvider.BeginTransactionAsync())
{
try
{
await sessionProvider.CreateOrUpdateAsync(serverSession);
var savedRole = await roleManager.Roles.FirstOrDefaultAsync(x => x.Name == "ProtocoledUsers");
await userManager.AddToRoleAsync(user, savedRole.Name);
byte[] strongKey = CryptoRandomizer.GenerateSecurityKey(16);
var cypher = await cypherProvider.CreateOrUpdateAsync(new Cypher()
{
Secret = strongKey
});
var key = await strongKeyProvider.CreateOrUpdateAsync(new StrongKey()
{
CypherId = cypher.Id,
UserId = user.Id
});
string strongKeyToCrypt = strongKey.ToUrlSafeBase64();
string cryptedAesKey = rsaCypher.Crypt(model.PublicKey, strongKeyToCrypt);
await transaction.CommitAsync();
return(new CreateFirstMessangerSessionResponse()
{
ServerPublicKey = serverKeys.publicKey,
CryptedAes = cryptedAesKey
});
}
catch (Exception ex)
{
await transaction.RollbackAsync();
throw new ApiError(new ServerException(ex.Message));
}
}
}
}