public static IJType GetJsonDecoded(Context context, byte[] message, long senderId)
{
byte[] aesBinKey = context.Contacts
.Where(u => u.PublicId == senderId)
.Select(u => u.ReceiveAesKey)
.SingleOrDefault();
AESPassword key = new AESPassword(aesBinKey);
byte[] decrypted = key.Decrypt(message);
JsonTypes type = (JsonTypes)decrypted[0];
string jsonText = Encoding.UTF8.GetString(decrypted, 1, decrypted.Length - 1);
switch (type)
{
case JsonTypes.ALARM:
return(JsonConvert.DeserializeObject <JAlarm>(jsonText));
case JsonTypes.CONTACT_DETAIL:
return(JsonConvert.DeserializeObject <JContactDetail>(jsonText));
case JsonTypes.MESSAGES:
return(JsonConvert.DeserializeObject <JMessage>(jsonText));
case JsonTypes.MESSAGES_THREAD:
return(JsonConvert.DeserializeObject <JMessageThread>(jsonText));
case JsonTypes.AES_KEY:
return(JsonConvert.DeserializeObject <JAESKey>(jsonText));
default:
throw new Exception("Unknown JsonType.");
}
}
public static JsonCapsula GetJsonDecoded(Context context, byte[] message, long senderId)
{
byte[] aesBinKey = context.Contacts
.Where(u => u.PublicId == senderId)
.Select(u => u.ReceiveAesKey)
.SingleOrDefault();
AESPassword key = new AESPassword(aesBinKey);
byte[] decrypted = key.Decrypt(message);
MemoryStream stream = new MemoryStream(decrypted);
JsonTypes type = (JsonTypes)BinaryEncoder.ReadInt(stream);
string jsonText = TextEncoder.ReadString(stream);
byte[] attechment = null;
int isAttechment = BinaryEncoder.ReadInt(stream);
if (isAttechment == 1)
{
attechment = BinaryEncoder.ReceiveBytes(stream);
}
IJType jmessage;
switch (type)
{
case JsonTypes.ALARM:
jmessage = JsonConvert.DeserializeObject <JAlarm>(jsonText);
break;
case JsonTypes.CONTACT:
jmessage = JsonConvert.DeserializeObject <JContact>(jsonText);
break;
case JsonTypes.MESSAGES:
jmessage = JsonConvert.DeserializeObject <JMessage>(jsonText);
break;
case JsonTypes.MESSAGES_THREAD:
jmessage = JsonConvert.DeserializeObject <JMessageThread>(jsonText);
break;
default:
throw new Exception("Unknown JsonType.");
}
return(new JsonCapsula()
{
Attechment = attechment,
Message = jmessage
});
}
static void AesTrial()
{
using (Context context = new Context(config))
{
byte[] aesBinKey = context.Contacts
.Where(u => u.PublicId == connection.UserId)
.Select(u => u.ReceiveAesKey)
.SingleOrDefault();
AESPassword key = new AESPassword(aesBinKey);
String testStr = "Testy tisty teristy\n";
for (int i = 0; i != 3; i++)
{
testStr += testStr;
}
WriteLine($"Encrypting string: {testStr}");
byte[] data = Encoding.UTF8.GetBytes(testStr);
byte[] encrypted = key.Encrypt(data);
WriteLine(Encoding.UTF8.GetString(key.Decrypt(encrypted)));
}
}