public MessageModel GetServerMessage([FromBody] MessageModel _clientMessage)
{
if (_clientMessage.IsValid())
{
try
{
using (SqlProvider sqlOp = new SqlProvider())
using (AESOperations aesOp = new AESOperations())
{
KeyModel sessionParameters = sqlOp.GetSessionKeys(new Guid(_clientMessage.SessionId));
if (sessionParameters != null && !string.IsNullOrEmpty(sessionParameters.PrivateKey) && !string.IsNullOrEmpty(sessionParameters.EncKey) && !string.IsNullOrEmpty(sessionParameters.IVKey))
{
string clientMessage = aesOp.Decrypt(_clientMessage.Message, Encoding.ASCII.GetBytes(sessionParameters.EncKey), Encoding.ASCII.GetBytes(sessionParameters.IVKey));
if (clientMessage.Equals("MESSAGE FROM CLIENT"))
{
return(new MessageModel()
{
Message = aesOp.Encrypt("LEGIT CLIENT", Encoding.ASCII.GetBytes(sessionParameters.EncKey), Encoding.ASCII.GetBytes(sessionParameters.IVKey))
});
}
}
}
}
catch
{ }
}
return(null);
}
public ResponseModel ShareSessionKeys([FromBody] SessionKeyRequestModel _clientInfo)
{
if (_clientInfo.IsValid())
{
using (SqlProvider sqlOp = new SqlProvider())
using (RSAOperations keyOp = new RSAOperations())
{
KeyModel sessionParameters = sqlOp.GetSessionKeys(new Guid(_clientInfo.SessionId));
if (sessionParameters != null && !string.IsNullOrEmpty(sessionParameters.PrivateKey) && !string.IsNullOrEmpty(sessionParameters.EncKey) && !string.IsNullOrEmpty(sessionParameters.IVKey))
{
string clientPublicKey = string.Empty;
foreach (string chunk in _clientInfo.ClientPublic.Split('≡'))
{
clientPublicKey += keyOp.Decrypt(sessionParameters.PrivateKey, chunk);
}
if (!string.IsNullOrEmpty(clientPublicKey))
{
string encryptedEKey = keyOp.Encrypt(clientPublicKey, sessionParameters.EncKey);
string encryptedIKey = keyOp.Encrypt(clientPublicKey, sessionParameters.IVKey);
return(new ResponseModel()
{
EKey = encryptedEKey, IKey = encryptedIKey
});
}
}
}
}
return(null);
}