static public string SyncDecode(SMSSyncAlgo alg, byte[] data, byte[] key, byte[] iv, out byte[] res)
{
string err = null;
res = null;
try
{
switch (alg)
{
case SMSSyncAlgo.DES:
err = DecDES(data, key, iv, out res);
break;
default:
err = "Invalid Symmetric algorithm";
break;
}
}
catch (Exception exp)
{
res = null;
err = exp.Message;
}
return(err);
}
public bool updateSynKey(SMSHash hash, byte[] ext, SMSSyncAlgo sync, byte[] key, byte[] iv, string contact)
{
IMORZEContact cnt;
bool bres = false;
cnt = m_addressBook.GetContact(contact, true);
if (cnt != null)
{
try
{
bres = cnt.updateSynKey(hash, ext, sync, key, iv);
if (bres == true)
{
if (string.IsNullOrEmpty(m_addressBook.Save()) == true)
{
bres = true;
}
}
}
catch
{
bres = false;
}
}
return(bres);
}
public ExtKey(SMSHash hash, byte[] ext, SMSSyncAlgo sync, byte[] key, byte[] iv)
{
m_date = DateTime.Now;
if (sync == SMSSyncAlgo.DES && hash == SMSHash.MD5)
{
m_alg = sync;
m_halg = hash;
m_pk = key;
m_pkIV = iv;
m_inExt = ext;
}
else
{
throw new Exception("Invalid arguments");
}
}
public ExtKey(RNGCryptoServiceProvider rng, SMSSyncAlgo alg, SMSHash hash)
{
m_date = DateTime.Now;
if (alg == SMSSyncAlgo.DES && hash == SMSHash.MD5)
{
m_alg = alg;
m_halg = hash;
m_pk = new byte[8];
rng.GetBytes(m_pk);
m_pkIV = new byte[8];
rng.GetBytes(m_pkIV);
m_inExt = new byte[16];
rng.GetBytes(m_inExt);
}
else
{
throw new Exception("Invalid arguments");
}
}
public bool updateSynKey(SMSHash hash, byte[] ext, SMSSyncAlgo sync, byte[] key, byte[] iv)
{
bool bret = false;
try
{
ExtKey extKey = new ExtKey(hash, ext, sync, key, iv);
if (m_Exts == null)
{
m_Exts = new List <ExtKey>();
}
m_Exts.Add(extKey);
bret = true;
}
catch
{
bret = false;
}
return(bret);
}
static public string SyncDecode(SMSSyncAlgo alg, byte[] data, byte[] key, byte[] iv, out string text)
{
string err = null;
text = null;
try
{
byte[] res = null;
err = SyncDecode(alg, data, key, iv, out res);
if (res != null && string.IsNullOrEmpty(err) == false)
{
text = Encoding.ASCII.GetString(res);
}
}
catch (Exception exp)
{
text = null;
err = exp.Message;
}
return(err);
}
static public string SyncEncode(SMSSyncAlgo alg, string text, byte[] key, byte[] iv, out byte[] res)
{
string err = null;
res = null;
try
{
byte[] data = Encoding.ASCII.GetBytes(text);
err = SyncEncode(alg, data, key, iv, out res);
if (string.IsNullOrEmpty(err) == false)
{
res = null;
}
}
catch (Exception exp)
{
res = null;
err = exp.Message;
}
return(err);
}
bool operateAsyncType1(byte[] data, byte[] tail)
{
bool isSuccess = false;
int off = 1;
byte[] ext = null;
byte[] sync = null;
byte[] iv = null;
SMSHash hashid = SMSHash.None;
SMSSyncAlgo syncid = SMSSyncAlgo.None;
int extlen = 0;
int synlen = 0;
switch (data[off])
{
case 1: //MD5
extlen = 0x10;
hashid = SMSHash.MD5;
break;
}
if (extlen > 0)
{
off++;
ext = new byte[extlen];
Array.Copy(data, off, ext, 0, ext.Length);
off += ext.Length;
}
if (hashid != SMSHash.None)
{
switch (data[off])
{
case 1: //DES
syncid = SMSSyncAlgo.DES;
synlen = 8;
break;
}
}
if (synlen > 0)
{
off++;
sync = new byte[synlen];
iv = new byte[synlen];
Array.Copy(data, off, sync, 0, sync.Length);
off += sync.Length;
Array.Copy(data, off, iv, 0, iv.Length);
off += iv.Length;
}
if (off + 2 == data.Length) // +2 - CRC16
{
byte[] contactaddres;
string cont = null;
if (string.IsNullOrEmpty(SMSCrypt.SyncDecode(syncid, tail, sync, iv, out contactaddres)) == false)
{
contactaddres = null;
}
if (contactaddres != null)
{
try
{
cont = Encoding.ASCII.GetString(contactaddres);
Convert.FromBase64String(cont.Substring(4));
isSuccess = m_acc.updateSynKey(hashid, ext, syncid, sync, iv, cont);
}
catch
{
isSuccess = false;
}
}
}
if (isSuccess == true)
{
MORZESendMessage cmdMsgTyp2;
//---------------
cmdMsgTyp2 = new MORZESendMessage();
BufferBuilder bb = new BufferBuilder();
bb.AddByte(2); // Type 2 - уведомление о получении ключей
bb.AddByte((byte)hashid);
bb.AddBytes(SMSCrypt.CalcHash(hashid, sync));
//byte[] msg = bb.GetAllBytes();
//bb = new BufferBuilder();
//bb.AddByte((byte)((int)0x80 ^ (int)hashid));
//bb.AddBytes(SMSCrypt.CalcHash(hashid, msg));
//bb.AddBytes(ext);
//bb.AddBytes(msg);
//cmdMsgTyp2.WriteBytes(bb.GetAllBytes());
byte[] res;
if (string.IsNullOrEmpty(SMSCrypt.SyncEncode(syncid, bb.GetAllBytes(), sync, iv, out res)) == true)
{//send notify to client
cmdMsgTyp2.AddMessageBody(res, hashid, ext);
if (m_responses == null)
{
m_responses = new List <SMSSendCommand>();
}
//set server filter setting
SMSSendExt setext = new SMSSendExt();
setext.pushExt(hashid, ext);
m_responses.Add(setext);
m_responses.Add(cmdMsgTyp2);
}
else
{
isSuccess = false;
}
}
return(isSuccess);
}
