public static void SendMessageOnGroup(APIServer server, GroupRepository groupRepository)
{
Console.WriteLine("Enter the group on which you want to send messages:");
var groupName = Console.ReadLine();
string pubKeyFile = groupName + "PublicKey.txt";
string privKeyFile = groupName + "PrivateKey.txt";
Group group = server.GetGroupByName(groupName);
if (pubKeyFile != null && privKeyFile != null)
{
var groupCreator = GetGroupCreator(server, pubKeyFile, privKeyFile);
ParticipantMessage message = new ParticipantMessage();
Console.WriteLine("Enter the message you want to send:");
message.Message = Console.ReadLine();
Console.WriteLine("Enter your nickname:");
var nickname = Console.ReadLine();
ClientParticipant clientParticipant = new ClientParticipant(server, groupRepository);
var blindparticipant = groupCreator.GetBlindParticipantByNickname(group.Id, nickname);
VerifiedParticipant verifiedParticipant = new VerifiedParticipant
{
PublicKey = blindparticipant.PublicKey,
Signature = blindparticipant.Signature
};
message.BlindParticipant = blindparticipant.Id.ToString();
clientParticipant.AddMessage(group.Id, message, verifiedParticipant);
Console.WriteLine("Participant verified");
Console.WriteLine("Message sent");
}
else
{
Console.WriteLine("Group creator Keys were not saved to file, please go to step 1");
}
}
static public void SaveBlindParticipant(APIServer server, GroupRepository groupRepository)
{
Console.WriteLine("Enter the group for which you want to register participants:");
var groupName = Console.ReadLine();
Console.WriteLine("Enter participant email address that you want to be saved as blind participant:");
var participantEmail = Console.ReadLine();
var group = server.GetGroupByName(groupName);
var factor = File.ReadAllText("BlindFactor.txt");
BigInteger blindFactor = new BigInteger(factor);
var fileToRead = (participantEmail.Substring(0, participantEmail.IndexOf("@")) + "PublicKey.txt").ToString();
RsaKeyParameters participantPublicKey = (RsaKeyParameters)RsaKeyUtils.GetDeserializedKPublicKey(File.ReadAllText(fileToRead));
GroupRegistration groupRegistration = new GroupRegistration(group, new ContentBlinder(group.RsaPublicKey, blindFactor), participantPublicKey);
ClientParticipant clientParticipant = new ClientParticipant(server, groupRepository);
VerifiedParticipant verifiedParticipant = clientParticipant.CheckVerifiedEntity(group, participantEmail, groupRegistration);
clientParticipant.AddClientCertificate(verifiedParticipant, group, participantEmail);
Console.WriteLine("Enter nickname:");
var nickname = Console.ReadLine();
clientParticipant.AddBlindParticipant(group.Id, verifiedParticipant, nickname);
Console.WriteLine();
Console.WriteLine("Participant was saved as a blind participant to the group");
}
public void SaveClientCertificate(VerifiedParticipant verifiedParticipant, Guid groupId, string email)
{
var participant = context.Participants.FirstOrDefault(p => p.GroupId == groupId && p.Email == email);
if (participant != null)
{
participant.EmailIsConfirmed = true;
}
context.Participants.Update(participant);
context.SaveChanges();
}
public void SaveMessage(VerifiedParticipant participant, ParticipantMessage message)
{
var blindParticipant = context.BlindParticipants.FirstOrDefault(p => p.PublicKey == participant.PublicKey && p.Signature == participant.Signature);
var conversationMessage = new ConversationMessage
{
GroupId = blindParticipant.GroupId,
Message = message.BlindParticipant + "-" + message.Message
};
context.ConversationMessages.Add(conversationMessage);
context.SaveChanges();
}
public List <VerifiedParticipant> GetBlindParticipants(Guid groupId)
{
List <VerifiedParticipant> list = new List <VerifiedParticipant>();
VerifiedParticipant verifiedParticipant = new VerifiedParticipant();
var blindparticipants = context.BlindParticipants.Where(b => b.GroupId == groupId).ToList();
foreach (var blindparticipant in blindparticipants)
{
verifiedParticipant.PublicKey = blindparticipant.PublicKey;
verifiedParticipant.Signature = blindparticipant.Signature;
list.Add(verifiedParticipant);
}
return(list);
}
public void AddMessage(Guid groupId, ParticipantMessage message, VerifiedParticipant participant)
{
var groupDetails = groupRepository.GetGroup(groupId);
var groupPubKey = File.ReadAllText(groupDetails.Name + "PublicKey.txt");
var rsaPubKey = RsaKeyUtils.GetDeserializedKPublicKey(groupPubKey);
SignedEntity signedEntity = new SignedEntity(FromBase64String(participant.PublicKey), FromBase64String(participant.Signature));
bool isVerified = signatureVerifier.Verify(signedEntity, rsaPubKey);
if (isVerified)
{
groupRepository.SaveMessage(participant, message);
}
}
public VerifiedParticipant CheckVerifiedEntity(Group group, string email, GroupRegistration groupRegistration)
{
var signedMessage = server.GetSignedMessage(group.Id, email);
if (signedMessage == null)
{
return(null);
}
VerifiedParticipant verifiedParticipant = new VerifiedParticipant();
verifiedParticipant.PublicKey = RsaKeyUtils.GetSerializedPublicKey(groupRegistration.PublicKey);
verifiedParticipant.Signature = GetSignature(groupRegistration, signedMessage);
return(verifiedParticipant);
}
public void AddBlindParticipant(Guid groupId, VerifiedParticipant verifiedParticipant, string nickname)
{
server.AddNewBlindParticipant(groupId, verifiedParticipant.PublicKey, verifiedParticipant.Signature, nickname);
}
public void AddMessage(Guid groupId, ParticipantMessage message, VerifiedParticipant participant)
{
server.AddMessage(groupId, message, participant);
}
public void AddClientCertificate(VerifiedParticipant verifiedParticipant, Group group, string email)
{
groupRepository.SaveClientCertificate(verifiedParticipant, group.Id, email);
}
