public void SetCipher(Cipher cipher, MAC mac, bool mac_enabled)
{
_cipher = cipher;
_mac = mac;
_macEnabled = mac_enabled;
_head = new byte[cipher.BlockSize];
}
public ActionResult AddMac()
{
var currentEmail = User.Identity.GetUserName();
Profile currentProfile = new Profile();
foreach (Profile profile in context.Profile)
{
if (profile.Email.Equals(currentEmail))
{
currentProfile = profile;
}
}
var macAddr = (
from nic in NetworkInterface.GetAllNetworkInterfaces()
where nic.OperationalStatus == OperationalStatus.Up
select nic.GetPhysicalAddress().ToString()
).FirstOrDefault();
MAC mac = new MAC();
mac.MACAdress = macAddr;
currentProfile.Macs.Add(mac);
context.SaveChanges();
return(RedirectToAction("Index", "Home"));
}
public void Read1()
{
MAC mac = MAC.Parse("FF:FF:FF:FF:FF:FF");
string name = "Adapter 1";
IP localip = IP.Parse("192.168.1.2");
IP Subnet = IP.Parse("255.255.255.0");
IP DefaultG = IP.Parse("192.168.1.1");
IP DNS = IP.Parse("1.1.1.1");
Adapter a = new Adapter(mac, 1, name, localip, Subnet, DefaultG, DNS, 1, true);
Adapter a2 = null;
XmlDocument doc = new XmlDocument();
doc.Load("XMLFile.xml");
foreach (XmlNode node in doc.DocumentElement)
{
if (node.Name == "AdapterRead1")
{
foreach (XmlNode n in node.ChildNodes)
{
if (n.Name == "Adapter")
{
a2 = Adapter.FromXML(n);
}
}
}
}
Assert.True(a.Equals(a2));
}
internal override bool isMatched(string _host)
{
if (!hashed)
{
return(base.isMatched(_host));
}
MAC macsha1 = mykh.getHMACSHA1();
try
{
lock (macsha1)
{
macsha1.init(salt);
byte[] foo = _host.getBytes();
macsha1.update(foo, 0, foo.Length);
byte[] bar = new byte[macsha1.getBlockSize()];
macsha1.doFinal(bar, 0);
return(Util.array_equals(hash, bar));
}
}
catch (Exception e)
{
Console.Out.WriteLine(e);
}
return(false);
}
protected void L_Autenticate_Authenticate(object sender, EventArgs e)
{
DAOUsuario guardarUsuario = new DAOUsuario();
DataTable data = guardarUsuario.loggin(L_Autenticate.UserName.ToString(), L_Autenticate.Password.ToString());
if (int.Parse(data.Rows[0]["user_id"].ToString()) > 0)
{
Session["nombre"] = data.Rows[0]["nombre"].ToString();
Session["user_id"] = data.Rows[0]["user_id"].ToString();
EUsuario datosUsuario = new EUsuario();
MAC datosConexion = new MAC();
/* ipAddress = HttpContext.Current.Request.UserHostAddress;
* mac = Utilidades.Mac.GetMAC(ref ipAddress);*/
datosUsuario.UserId = int.Parse(Session["user_id"].ToString());
datosUsuario.Ip = datosConexion.ip();
datosUsuario.Mac = datosConexion.mac();
datosUsuario.Session = Session.SessionID;
datosUsuario.RolId = int.Parse(data.Rows[0]["rol_id"].ToString());
Session["user"] = datosUsuario;
guardarUsuario.guardadoSession(datosUsuario);
if (datosUsuario.RolId == 1)
{
Response.Redirect("MenuAdmin.aspx");
}
else
{
Response.Redirect("MenuOperador.aspx");
}
}
}
protected void Login_Conductor_Authenticate1(object sender, AuthenticateEventArgs e)
{
Conductor conductor = new Conductor();
conductor.Usuario = Login_Conductor.UserName;
conductor.Contrasena = Login_Conductor.Password;
((Label)Login_Conductor.FindControl("LN_Mensaje")).Text = new LConductor().login(conductor);
//Session["user"] = null; //Variable vacia (No ha iniciado sesión)
conductor = new DaoConductor().login(conductor);
MAC conexion = new MAC();
AccesoConductor accesoc = new AccesoConductor();
object s = Session["user"] = conductor; //Variable llena (Se inicio sesión)
if (s != null)
{
Session["user"] = conductor;
accesoc.FechaInicio = DateTime.Now;
accesoc.Ip = conexion.ip();
accesoc.Mac = conexion.mac();
accesoc.Session = Session.SessionID;
accesoc.IdConductor = conductor.IdConductor;
new DaoSeguridadConductor().insertarAcceso(accesoc);
}
}
internal override bool IsMatched(string _host)
{
if (!this.hashed)
{
return(base.IsMatched(_host));
}
MAC macsha1 = this._enclosing.GetHMACSHA1();
try
{
lock (macsha1)
{
macsha1.Init(this.salt);
byte[] foo = Util.Str2byte(_host);
macsha1.Update(foo, 0, foo.Length);
byte[] bar = new byte[macsha1.GetBlockSize()];
macsha1.DoFinal(bar, 0);
return(Util.Array_equals(this.hash, bar));
}
}
catch (Exception e)
{
System.Console.Out.WriteLine(e);
}
return(false);
}
private byte[] GenerateCryptogram(CryptogramType cryptogramType)
{
var data = new List <byte>();
switch (cryptogramType)
{
case CryptogramType.Card:
data.AddRange(this.HostChallenge);
data.AddRange(this.SequenceCounter);
data.AddRange(this.CardChallenge);
break;
case CryptogramType.Host:
data.AddRange(this.SequenceCounter);
data.AddRange(this.CardChallenge);
data.AddRange(this.HostChallenge);
break;
}
data.Pad();
byte[] cryptogram = MAC.Algorithm1(data.ToArray(), this.EncryptionKey);
return(cryptogram);
}
protected void BT_Ingresar_Click(object sender, EventArgs e)
{
UUser datos = new UUser();
LUser logic = new LUser();
LMUser lmuser = new LMUser();
datos = lmuser.loggear(TB_UserName.Text, TB_Clave.Text, int.Parse(Session["idioma"].ToString()), NoBotLogin.IsValid());
Session["userId"] = datos.SUserId;
Session["userName"] = datos.SUserName;
Session["nombre"] = datos.SNombre;
Session["apellido"] = datos.SApellido;
Session["clave"] = datos.SClave;
Session["correo"] = datos.SCorreo;
Session["documento"] = datos.SDocumento;
Session["foto"] = datos.SFoto;
try
{
MAC datosConexion = new MAC();
lmuser.logicaGuardarSesion(int.Parse(Session["userId"].ToString()),
datosConexion.ip(),
datosConexion.mac(),
Session.SessionID);
Response.Redirect(datos.Url);
}
catch
{
L_Error.Text = datos.Mensaje;
}
this.Page.Response.Write(datos.MensajeIntentoErroneos);
}
public void CanProveAndVerifyMAC()
{
// The coordinator generates a composed private key called CoordinatorSecretKey
// and derives from that the coordinator's public parameters called CoordinatorParameters.
var rnd = new SecureRandom();
var coordinatorKey = new CoordinatorSecretKey(rnd);
var coordinatorParameters = coordinatorKey.ComputeCoordinatorParameters();
// A blinded amount is known as an `attribute`. In this case the attribute Ma is the
// value 10000 blinded with a random `blindingFactor`. This attribute is sent to
// the coordinator.
var amount = new Scalar(10_000);
var blindingFactor = rnd.GetScalar();
var Ma = amount * Generators.G + blindingFactor * Generators.Gh;
// The coordinator generates a MAC and a proof that the MAC was generated using the
// coordinator's secret key. The coordinator sends the pair (MAC + proofOfMac) back
// to the client.
var t = rnd.GetScalar();
var mac = MAC.ComputeMAC(coordinatorKey, Ma, t);
var coordinatorStatement = ProofSystem.CreateStatement(coordinatorParameters, mac.V, Ma, t);
var proverBuilder = ProofSystem.CreateProver(coordinatorStatement, coordinatorKey);
var macProver = proverBuilder(rnd);
var proofOfMac = macProver();
// The client receives the MAC and the proofOfMac which let the client know that the MAC
// was generated with the coordinator's secret key.
var clientStatement = ProofSystem.CreateStatement(coordinatorParameters, mac.V, Ma, mac.T);
var verifierBuilder = ProofSystem.CreateVerifier(clientStatement);
var macVerifier = verifierBuilder(proofOfMac);
var isValidProof = macVerifier();
Assert.True(isValidProof);
}
internal void Hash()
{
if (hashed)
{
return;
}
MAC macsha1 = mykh.getHMACSHA1();
if (salt == null)
{
Random random = Session.random;
lock (random)
{
salt = new byte[macsha1.getBlockSize()];
random.fill(salt, 0, salt.Length);
}
}
try
{
lock (macsha1)
{
macsha1.init(salt);
byte[] foo = host.getBytes();
macsha1.update(foo, 0, foo.Length);
hash = new byte[macsha1.getBlockSize()];
macsha1.doFinal(hash, 0);
}
}
catch //(Exception e)
{
}
host = HASH_MAGIC + Encoding.UTF8.GetString(Util.toBase64(salt, 0, salt.Length)) +
HASH_DELIM + Encoding.UTF8.GetString(Util.toBase64(hash, 0, hash.Length));
hashed = true;
}
/// <summary>
/// Overrides Close()
/// </summary>
/// <param name="cipher"></param>
/// <param name="rnd"></param>
/// <param name="mac"></param>
/// <param name="sequence"></param>
/// <returns></returns>
public override DataFragment Close(Cipher cipher, Random rnd, MAC mac, int sequence) {
byte[] buf = DataWriter.UnderlyingBuffer;
int sftpDataLength = DataWriter.Length - OFFSET_SFTP_PACKET_TYPE;
SSHUtil.WriteIntToByteArray(buf, OFFSET_CHANNEL_DATA_LENGTH, sftpDataLength + 4);
SSHUtil.WriteIntToByteArray(buf, OFFSET_SFTP_DATA_LENGTH, sftpDataLength);
return base.Close(cipher, rnd, mac, sequence);
}
public bool isAvailable(IP ip, MAC client)
{
lock (Leaseslock)
{
if (Leases.ContainsKey(ip))
{
if (Leases[ip].chaddr == client)
{
return(true);
}
else
{
return(false);
}
}
if (Reserved.ContainsKey(ip))
{
if ((bool)Reserved[ip].chaddr?.Equals(client))
{
return(true);
}
else
{
return(false);
}
}
else
{
return(true);
}
}
}
public void Close(Cipher cipher, Random rnd, MAC mac, int sequence, DataFragment result) {
if(!_is_open) throw new SSHException("internal state error");
int blocksize = cipher==null? 8 : cipher.BlockSize;
int payload_length = _writer.Length - (SEQUENCE_MARGIN + LENGTH_MARGIN + PADDING_MARGIN);
int r = 11 - payload_length % blocksize;
while(r < 4) r += blocksize;
_paddingLength = r;
_packetLength = PADDING_MARGIN + payload_length + _paddingLength;
int image_length = _packetLength + LENGTH_MARGIN;
//fill padding
for(int i=0; i<_paddingLength; i+=4)
_writer.Write(rnd.Next());
//manipulate stream
byte[] rawbuf = _writer.UnderlyingBuffer;
SSHUtil.WriteIntToByteArray(rawbuf, 0, sequence);
SSHUtil.WriteIntToByteArray(rawbuf, SEQUENCE_MARGIN, _packetLength);
rawbuf[SEQUENCE_MARGIN + LENGTH_MARGIN] = (byte)_paddingLength;
//mac
if(mac!=null) {
_mac = mac.ComputeHash(rawbuf, 0, _packetLength+LENGTH_MARGIN+SEQUENCE_MARGIN);
Array.Copy(_mac, 0, rawbuf, _packetLength+LENGTH_MARGIN+SEQUENCE_MARGIN, _mac.Length);
image_length += _mac.Length;
}
//encrypt
if(cipher!=null)
cipher.Encrypt(rawbuf, SEQUENCE_MARGIN, _packetLength+LENGTH_MARGIN, rawbuf, SEQUENCE_MARGIN);
result.Init(rawbuf, SEQUENCE_MARGIN, image_length);
_is_open = false;
}
public Lease(IP ClientIP, MAC ClientHardwareAddress, uint LeaseStartTick, uint LeaseLength)
{
ciaddr = ClientIP;
chaddr = ClientHardwareAddress;
this.LeaseStartTick = LeaseStartTick;
this.LeaseLength = LeaseLength;
}
public void Identicalbytearray()
{
Byte[] b1 = new byte[]
{
255,
255,
255,
255,
255,
255
};
Byte[] b2 = new byte[]
{
255,
255,
255,
255,
255,
255
};
MAC m1 = new MAC(b1);
MAC m2 = new MAC(b2);
Assert.True(m1.Equals(m2));
}
private void ProcessBuffer()
{
// buffer may contains multiple packet data
while (ConstructPacket())
{
if (IsMsgNewKeys(_packet))
{
// next packet must be decrypted with the new key
_cipher = null;
_mac = null;
_macEnabled = false;
_head = null;
_pending = true; // retain trailing packets in the buffer
_keyErrorDetectionTimeout = DateTime.MaxValue;
SSH2MsgNewKeys newKeysPacket =
new SSH2MsgNewKeys(_packet, new SSH2MsgNewKeys.Handler(OnMsgNewKeysDequeued));
_inner_handler.OnData(newKeysPacket);
break;
}
_inner_handler.OnData(_packet);
}
}
private void GetWingParameters()
{
N = Int16.Parse(txt_Segments.Text);
AR = Double.Parse(txt_AR.Text);
B = new Double[N, N];
txt_Sw.Text = S_w.ToString();
tr_w = Double.Parse(txt_Taper.Text);
b_w = Math.Round(Math.Sqrt(AR * S_w), 4);
txt_WingSpan.Text = b_w.ToString();
MAC = Math.Round(S_w / b_w, 4);
txt_MAC.Text = MAC.ToString();
cr_w = Math.Round((1.5 * MAC * (1 + tr_w)) / (1 + tr_w + Math.Pow(tr_w, 2)), 4);
txt_RootChord.Text = cr_w.ToString();
i_w = Double.Parse(txt_WingSetting.Text);
alpha0 = Double.Parse(txt_Zerolift.Text);
a_2d = Double.Parse(txt_LiftCurve.Text);
alpha_twist = Double.Parse(txt_Twist.Text);
}
/// <summary>
/// Gets the binary image of this packet.
/// </summary>
/// <param name="cipher">cipher algorithm, or null if no encryption.</param>
/// <param name="mac">MAC algorithm, or null if no MAC.</param>
/// <param name="sequenceNumber">sequence number</param>
/// <returns>data</returns>
public DataFragment GetImage(Cipher cipher, MAC mac, uint sequenceNumber)
{
BeforeBuildImage();
ByteBuffer image = BuildImage(cipher, mac, sequenceNumber);
_lockFlag.Value = false;
return(image.AsDataFragment());
}
/// <summary>
/// Set cipher settings.
/// </summary>
/// <param name="cipher">cipher algorithm, or null if not specified.</param>
/// <param name="mac">MAC algorithm, or null if not specified.</param>
public void SetCipher(Cipher cipher, MAC mac)
{
lock (_cipherSync) {
_cipher = cipher;
_mac = mac;
_macLength = (_mac != null) ? _mac.Size : 0;
}
}
//constracts and appends mac
public void CalcHash(MAC mac, int sequence)
{
byte[] buf = new byte[4 + 4 + _packetLength];
SSHUtil.WriteIntToByteArray(buf, 0, sequence);
WriteTo(buf, 4, false);
_mac = mac.Calc(buf);
}
/// <summary>
/// Gets the binary image of this packet.
/// </summary>
/// <param name="cipher">cipher algorithm, or null if no encryption.</param>
/// <param name="mac">MAC algorithm, or null if no MAC.</param>
/// <param name="sequenceNumber">sequence number</param>
/// <returns>data</returns>
public DataFragment GetImage(Cipher cipher, MAC mac, uint sequenceNumber)
{
BeforeBuildImage();
ByteBuffer image = BuildImage(cipher, mac, sequenceNumber);
Recycle();
return(image.AsDataFragment());
}
private (MAC Mac, Knowledge Knowledge) IssueCredential(GroupElement ma, Scalar t)
{
var sk = CoordinatorSecretKey;
var mac = MAC.ComputeMAC(sk, ma, t);
var knowledge = ProofSystem.IssuerParameters(mac, ma, sk);
return(mac, knowledge);
}
public MAC GetMAC(byte[] bytes)
{
var WCHash = new WCHash(bytes.Length * 4, _macLength * 4, _keyBuffer.GetKey((int)Math.Ceiling((_macLength + Math.Log2(Math.Log2((int)bytes.Length * 4)) * Math.Log2((int)bytes.Length * 4)))));
var mac = new MAC(WCHash.F(bytes).ToByteArray());
return(mac);
}
public override int GetHashCode()
{
int hash = Name.GetHashCode();
hash = 31 * hash + MAC.GetHashCode();
hash = 31 * hash + ConnectionQuality.GetHashCode();
hash = 31 * hash + AuthenticationType.GetHashCode();
return(hash);
}
public SSH2PacketBuilder(IDataHandler handler) : base(handler)
{
_buffer = new DataFragment(0x1000);
_packet = new DataFragment(_buffer.Capacity);
_sequence = 0;
_cipher = null;
_mac = null;
_head = null;
}
public string VerificaRegistro()
{
//Variáveis.
DA = null;
DA = new SqlCeDataAdapter("Select * from CH_Hardware", SQLConn); //Instância DataAdapter com o cod a executar e a conexão
TBCH = null;
TBCH = new DataTable();
DA.Fill(TBCH); //preenche tabela
string Processador, HD, MAC;
if (TBCH.Rows.Count == 0) //Se igual a zero, insere na tabela.
{
SQLConn.Close();
InsereDados();
retorno = "C";
}
else //Senão, faz a comparação com o arquivo local.
{
InformacaoHD("IDHD");
InformacaoHD("Capacidade");
InformacaoHD("EspacoLivre");
InformacaoProcessador("IDProcessador");
InformacaoProcessador("Nome");
InformacaoProcessador("Arquitetura");
InformacaoMemoria("Capacidade");
InformacaoRede();
Processador = TBCH.Rows[0]["SERIALPROCESSADOR"].ToString();
HD = TBCH.Rows[0]["SERIALHD"].ToString();
MAC = TBCH.Rows[0]["EnderecoMAC"].ToString();
if ((Processador.Length <= 1) || (HD.Length <= 1) || (MAC.Length <= 1))
{
ExcluirTabela();
CriaTabelaChaveHardware();
//InsereDados();
return("C");
}
//Faz a comparação.
if ((IDProcessador.Trim() == Processador.Trim()) &&
(SerialHD.Trim() == HD.Trim()) &&
(MACRede.Trim() == MAC.Trim()))
{
retorno = "C";
}
else if (MACRede == "")
{
retorno = "C";
}
else
{
retorno = "N";
}
}
return(retorno);
}
/// <summary>
/// Overrides Close()
/// </summary>
/// <param name="cipher"></param>
/// <param name="mac"></param>
/// <param name="sequence"></param>
/// <returns></returns>
public override DataFragment Close(Cipher cipher, MAC mac, int sequence)
{
byte[] buf = DataWriter.UnderlyingBuffer;
int sftpDataLength = DataWriter.Length - OFFSET_SFTP_PACKET_TYPE;
SSHUtil.WriteIntToByteArray(buf, OFFSET_CHANNEL_DATA_LENGTH, sftpDataLength + 4);
SSHUtil.WriteIntToByteArray(buf, OFFSET_SFTP_DATA_LENGTH, sftpDataLength);
return(base.Close(cipher, mac, sequence));
}
public static Statement IssuerParametersStmt(CoordinatorParameters iparams, MAC mac, GroupElement ma)
=> new Statement(new GroupElement[, ]
{
// public Witness terms:
// point w, wp, x0, x1, ya
{ mac.V, Generators.Gw, O, mac.U, mac.T * mac.U, ma },
{ Generators.GV - iparams.I, O, O, Generators.Gx0, Generators.Gx1, Generators.Ga },
{ iparams.Cw, Generators.Gw, Generators.Gwp, O, O, O },
});
public Header(Command cmd, MAC destMAC)
{
this.Cmd = cmd;
this.Mac = destMAC;
this.PackNo = 1;
this.TotalNumOfPackets = 1;
this.SeqNo = 1;
}
/// <summary>
/// Set cipher settings.
/// </summary>
/// <param name="cipher">cipher algorithm, or null if not specified.</param>
/// <param name="mac">MAC algorithm, or null if not specified.</param>
/// <param name="checkMAC">specifies whether MAC check is performed.</param>
public void SetCipher(Cipher cipher, MAC mac, bool checkMAC)
{
lock (_cipherSync) {
_cipher = cipher;
_mac = mac;
_macLength = (mac != null) ? mac.Size : 0;
_checkMAC = (mac != null) ? checkMAC : false;
}
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="handler">a handler that SSH packets are passed to</param>
public SSH2Packetizer(IDataHandler handler)
{
_nextHandler = handler;
_sequence = 0;
_cipher = null;
_mac = null;
_macLength = 0;
_packetLength = -1;
}
// Derived class can override this method to modify the buffer.
public virtual DataFragment Close(Cipher cipher, MAC mac, int sequence) {
if (!_isOpen)
throw new SSHException("internal state error");
int blocksize = cipher == null ? 8 : cipher.BlockSize;
int payloadLength = _writer.Length - (SEQUENCE_MARGIN + LENGTH_MARGIN + PADDING_MARGIN);
int paddingLength = 11 - payloadLength % blocksize;
while (paddingLength < 4)
paddingLength += blocksize;
int packetLength = PADDING_MARGIN + payloadLength + paddingLength;
int imageLength = packetLength + LENGTH_MARGIN;
//fill padding
byte[] tmp = new byte[4];
Rng rng = RngManager.GetSecureRng();
for (int i = 0; i < paddingLength; i += 4) {
rng.GetBytes(tmp);
_writer.Write(tmp);
}
//manipulate stream
byte[] rawbuf = _writer.UnderlyingBuffer;
SSHUtil.WriteIntToByteArray(rawbuf, 0, sequence);
SSHUtil.WriteIntToByteArray(rawbuf, SEQUENCE_MARGIN, packetLength);
rawbuf[SEQUENCE_MARGIN + LENGTH_MARGIN] = (byte)paddingLength;
//mac
if (mac != null) {
byte[] macCode = mac.ComputeHash(rawbuf, 0, packetLength + LENGTH_MARGIN + SEQUENCE_MARGIN);
Array.Copy(macCode, 0, rawbuf, packetLength + LENGTH_MARGIN + SEQUENCE_MARGIN, macCode.Length);
imageLength += macCode.Length;
}
//encrypt
if (cipher != null)
cipher.Encrypt(rawbuf, SEQUENCE_MARGIN, packetLength + LENGTH_MARGIN, rawbuf, SEQUENCE_MARGIN);
_dataFragment.Init(rawbuf, SEQUENCE_MARGIN, imageLength);
_isOpen = false;
return _dataFragment;
}
private void ProcessBuffer()
{
// buffer may contains multiple packet data
while (ConstructPacket()) {
if (IsMsgNewKeys(_packet)) {
// next packet must be decrypted with the new key
_cipher = null;
_mac = null;
_macEnabled = false;
_head = null;
_pending = true; // retain trailing packets in the buffer
_keyErrorDetectionTimeout = DateTime.MaxValue;
SSH2MsgNewKeys newKeysPacket =
new SSH2MsgNewKeys(_packet, new SSH2MsgNewKeys.Handler(OnMsgNewKeysDequeued));
_inner_handler.OnData(newKeysPacket);
break;
}
_inner_handler.OnData(_packet);
}
}
public void SetCipher(Cipher cipher, MAC mac, bool mac_enabled)
{
lock (_cipherSync) {
try {
_cipher = cipher;
_mac = mac;
_macEnabled = mac_enabled;
_head = new byte[cipher.BlockSize];
_pending = false;
_keyErrorDetectionTimeout = DateTime.MaxValue;
ProcessBuffer();
} catch (Exception ex) {
OnError(ex);
}
}
}
public SSH2PacketBuilder(IDataHandler handler)
: base(handler)
{
_buffer = new DataFragment(0x1000);
_packet = new DataFragment(_buffer.Capacity);
_sequence = 0;
_cipher = null;
_mac = null;
_head = null;
}
public static SSH2Packet FromDecryptedHead(byte[] head, byte[] buffer, int offset, Cipher cipher, int sequence, MAC mac)
{
SSH2Packet p = new SSH2Packet();
p._packetLength = SSHUtil.ReadInt32(head, 0);
if(p._packetLength<=0 || p._packetLength>=MAX_PACKET_LENGTH) throw new Exception(String.Format("packet size {0} is invalid", p._packetLength));
SSH2DataWriter buf = new SSH2DataWriter();
buf.Write(sequence);
buf.Write(head);
if(p._packetLength > (cipher.BlockSize - 4)) {
byte[] tmp = new byte[p._packetLength-(cipher.BlockSize - 4)];
cipher.Decrypt(buffer, offset, tmp.Length, tmp, 0);
offset += tmp.Length;
buf.Write(tmp);
}
byte[] result = buf.ToByteArray();
int padding_len = (int)result[8];
if(padding_len<4) throw new Exception("padding length is invalid");
byte[] payload = new byte[result.Length-9-padding_len];
Array.Copy(result, 9, payload, 0, payload.Length);
p._payload = payload;
if(mac!=null) {
p._mac = mac.Calc(result);
if(SSHUtil.memcmp(p._mac, 0, buffer, offset, mac.Size)!=0)
throw new Exception("MAC Error");
}
return p;
}
public SSH2PacketBuilder(ISSH2PacketHandler handler)
{
_handler = handler;
_buffer = new byte[0x1000];
_readOffset = 0;
_writeOffset = 0;
_sequence = 0;
_cipher = null;
_mac = null;
_head = null;
}
public void SetCipher(Cipher c, MAC m)
{
_cipher = c;
_mac = m;
}
private MAC getHMACSHA1()
{
if (hmacsha1 == null)
{
try
{
Type c = Type.GetType(JSch.getConfig("hmac-sha1"));
hmacsha1 = (MAC)(c.newInstance());
}
catch (Exception e)
{
Console.Error.WriteLine("hmacsha1: " + e);
}
}
return hmacsha1;
}
private void updateKeys(KeyExchange kex)
{
byte[] K = kex.getK();
byte[] H = kex.getH();
HASH hash = kex.getHash();
// string[] guess=kex.guess;
if (session_id == null)
{
session_id = new byte[H.Length];
Array.Copy(H, 0, session_id, 0, H.Length);
}
/*
Initial IV client to server: HASH (K || H || "A" || session_id)
Initial IV server to client: HASH (K || H || "B" || session_id)
Encryption key client to server: HASH (K || H || "C" || session_id)
Encryption key server to client: HASH (K || H || "D" || session_id)
Integrity key client to server: HASH (K || H || "E" || session_id)
Integrity key server to client: HASH (K || H || "F" || session_id)
*/
buf.reset();
buf.putMPInt(K);
buf.putByte(H);
buf.putByte((byte)0x41);
buf.putByte(session_id);
hash.update(buf.buffer, 0, buf.index);
IVc2s = hash.digest();
int j = buf.index - session_id.Length - 1;
buf.buffer[j]++;
hash.update(buf.buffer, 0, buf.index);
IVs2c = hash.digest();
buf.buffer[j]++;
hash.update(buf.buffer, 0, buf.index);
Ec2s = hash.digest();
buf.buffer[j]++;
hash.update(buf.buffer, 0, buf.index);
Es2c = hash.digest();
buf.buffer[j]++;
hash.update(buf.buffer, 0, buf.index);
MACc2s = hash.digest();
buf.buffer[j]++;
hash.update(buf.buffer, 0, buf.index);
MACs2c = hash.digest();
try
{
Type c;
string method;
method = guess[KeyExchange.PROPOSAL_ENC_ALGS_STOC];
c = Type.GetType(getConfig(method));
s2ccipher = (Cipher)(c.newInstance());
while (s2ccipher.getBlockSize() > Es2c.Length)
{
buf.reset();
buf.putMPInt(K);
buf.putByte(H);
buf.putByte(Es2c);
hash.update(buf.buffer, 0, buf.index);
byte[] foo = hash.digest();
byte[] bar = new byte[Es2c.Length + foo.Length];
Array.Copy(Es2c, 0, bar, 0, Es2c.Length);
Array.Copy(foo, 0, bar, Es2c.Length, foo.Length);
Es2c = bar;
}
s2ccipher.init(Cipher.DECRYPT_MODE, Es2c, IVs2c);
s2ccipher_size = s2ccipher.getIVSize();
method = guess[KeyExchange.PROPOSAL_MAC_ALGS_STOC];
c = Type.GetType(getConfig(method));
s2cmac = (MAC)(c.newInstance());
s2cmac.init(MACs2c);
//mac_buf=new byte[s2cmac.getBlockSize()];
s2cmac_result1 = new byte[s2cmac.getBlockSize()];
s2cmac_result2 = new byte[s2cmac.getBlockSize()];
method = guess[KeyExchange.PROPOSAL_ENC_ALGS_CTOS];
c = Type.GetType(getConfig(method));
c2scipher = (Cipher)(c.newInstance());
while (c2scipher.getBlockSize() > Ec2s.Length)
{
buf.reset();
buf.putMPInt(K);
buf.putByte(H);
buf.putByte(Ec2s);
hash.update(buf.buffer, 0, buf.index);
byte[] foo = hash.digest();
byte[] bar = new byte[Ec2s.Length + foo.Length];
Array.Copy(Ec2s, 0, bar, 0, Ec2s.Length);
Array.Copy(foo, 0, bar, Ec2s.Length, foo.Length);
Ec2s = bar;
}
c2scipher.init(Cipher.ENCRYPT_MODE, Ec2s, IVc2s);
c2scipher_size = c2scipher.getIVSize();
method = guess[KeyExchange.PROPOSAL_MAC_ALGS_CTOS];
c = Type.GetType(getConfig(method));
c2smac = (MAC)(c.newInstance());
c2smac.init(MACc2s);
method = guess[KeyExchange.PROPOSAL_COMP_ALGS_CTOS];
initDeflater(method);
method = guess[KeyExchange.PROPOSAL_COMP_ALGS_STOC];
initInflater(method);
}
catch (Exception e)
{
if (e is JSchException)
throw e;
throw new JSchException(e.ToString(), e);
//Console.Error.WriteLine("updatekeys: "+e);
}
}
internal void RefreshKeys(byte[] sessionID, Cipher tc, Cipher rc, MAC tm, MAC rm) {
lock(this) { //these must change synchronously
_sessionID = sessionID;
_tCipher = tc;
_tMAC = tm;
_packetBuilder.SetCipher(rc, rm, _param.CheckMACError);
_asyncKeyExchanger = null;
}
}
private DataFragment SendNEWKEYS(Mode mode) {
_status = Status.WAIT_NEWKEYS;
Monitor.Enter(_connection); //lock the connection during we exchange sSH_MSG_NEWKEYS
TransmitRawPayload(new byte[1] {(byte)PacketType.SSH_MSG_NEWKEYS});
//establish Ciphers
_tc = CipherFactory.CreateCipher(SSHProtocol.SSH2, _cInfo._algorithmForTransmittion,
DeriveKey(_k, _hash, 'C', CipherFactory.GetKeySize(_cInfo._algorithmForTransmittion)), DeriveKey(_k, _hash, 'A', CipherFactory.GetBlockSize(_cInfo._algorithmForTransmittion)));
_rc = CipherFactory.CreateCipher(SSHProtocol.SSH2, _cInfo._algorithmForReception,
DeriveKey(_k, _hash, 'D', CipherFactory.GetKeySize(_cInfo._algorithmForReception)), DeriveKey(_k, _hash, 'B', CipherFactory.GetBlockSize(_cInfo._algorithmForReception)));
//establish MACs
MACAlgorithm ma = MACAlgorithm.HMACSHA1;
_tm = MACFactory.CreateMAC(MACAlgorithm.HMACSHA1, DeriveKey(_k, _hash, 'E', MACFactory.GetSize(ma)));
_rm = MACFactory.CreateMAC(MACAlgorithm.HMACSHA1, DeriveKey(_k, _hash, 'F', MACFactory.GetSize(ma)));
if(mode==Mode.Synchronized)
return _connection.ReceivePacket();
else
return null;
}
private void SendNEWKEYS()
{
_status = Status.WAIT_NEWKEYS;
_newKeyEvent = new ManualResetEvent(false);
TransmitPacket(new byte[1] {(byte)PacketType.SSH_MSG_NEWKEYS});
//establish Ciphers
_tc = CipherFactory.CreateCipher(SSHProtocol.SSH2, _cInfo._algorithmForTransmittion,
DeriveKey(_k, _hash, 'C', CipherFactory.GetKeySize(_cInfo._algorithmForTransmittion)), DeriveKey(_k, _hash, 'A', CipherFactory.GetBlockSize(_cInfo._algorithmForTransmittion)));
_rc = CipherFactory.CreateCipher(SSHProtocol.SSH2, _cInfo._algorithmForReception,
DeriveKey(_k, _hash, 'D', CipherFactory.GetKeySize(_cInfo._algorithmForReception)), DeriveKey(_k, _hash, 'B', CipherFactory.GetBlockSize(_cInfo._algorithmForReception)));
//establish MACs
MACAlgorithm ma = MACAlgorithm.HMACSHA1;
_tm = MACFactory.CreateMAC(MACAlgorithm.HMACSHA1, DeriveKey(_k, _hash, 'E', MACFactory.GetSize(ma)));
_rm = MACFactory.CreateMAC(MACAlgorithm.HMACSHA1, DeriveKey(_k, _hash, 'F', MACFactory.GetSize(ma)));
_newKeyEvent.Set();
}
internal void RefreshKeys(byte[] sessionID, Cipher tc, Cipher rc, MAC tm, MAC rm)
{
_sessionID = sessionID;
_tCipher = tc;
_tMAC = tm;
_packetBuilder.SetCipher(rc, _param.CheckMACError? rm : null);
_asyncKeyExchanger = null;
}
//constracts and appends mac
public void CalcHash(MAC mac, int sequence)
{
byte[] buf = new byte[4+4+_packetLength];
SSHUtil.WriteIntToByteArray(buf, 0, sequence);
WriteTo(buf, 4, false);
_mac = mac.Calc(buf);
}
public void SetCipher(Cipher cipher, MAC mac, bool mac_enabled)
{
_cipher = cipher;
_mac = mac;
_macEnabled = mac_enabled;
_head = new byte[cipher.BlockSize];
}
private void updateKeys(KeyExchange kex)
{
byte[] K = kex.getK();
byte[] H = kex.getH();
HASH hash = kex.getHash();
string[] guess = kex.m_guess;
if (m_session_id == null)
{
m_session_id = new byte[H.Length];
Array.Copy(H, 0, m_session_id, 0, H.Length);
}
/*
Initial IV client to server: HASH (K || H || "A" || session_id)
Initial IV server to client: HASH (K || H || "B" || session_id)
Encryption key client to server: HASH (K || H || "C" || session_id)
Encryption key server to client: HASH (K || H || "D" || session_id)
Integrity key client to server: HASH (K || H || "E" || session_id)
Integrity key server to client: HASH (K || H || "F" || session_id)
*/
m_buf.reset();
m_buf.putMPInt(K);
m_buf.putByte(H);
m_buf.putByte((byte)0x41);
m_buf.putByte(m_session_id);
hash.update(m_buf.m_buffer, 0, m_buf.m_index);
m_IVc2s = hash.digest();
int j = m_buf.m_index - m_session_id.Length - 1;
m_buf.m_buffer[j]++;
hash.update(m_buf.m_buffer, 0, m_buf.m_index);
m_IVs2c = hash.digest();
m_buf.m_buffer[j]++;
hash.update(m_buf.m_buffer, 0, m_buf.m_index);
m_Ec2s = hash.digest();
m_buf.m_buffer[j]++;
hash.update(m_buf.m_buffer, 0, m_buf.m_index);
m_Es2c = hash.digest();
m_buf.m_buffer[j]++;
hash.update(m_buf.m_buffer, 0, m_buf.m_index);
m_MACc2s = hash.digest();
m_buf.m_buffer[j]++;
hash.update(m_buf.m_buffer, 0, m_buf.m_index);
m_MACs2c = hash.digest();
try
{
Class c;
c = Class.ForName(getConfig(guess[KeyExchange.PROPOSAL_ENC_ALGS_STOC]));
m_s2ccipher = (Cipher)(c.Instance());
while (m_s2ccipher.BlockSize > m_Es2c.Length)
{
m_buf.reset();
m_buf.putMPInt(K);
m_buf.putByte(H);
m_buf.putByte(m_Es2c);
hash.update(m_buf.m_buffer, 0, m_buf.m_index);
byte[] foo = hash.digest();
byte[] bar = new byte[m_Es2c.Length + foo.Length];
Array.Copy(m_Es2c, 0, bar, 0, m_Es2c.Length);
Array.Copy(foo, 0, bar, m_Es2c.Length, foo.Length);
m_Es2c = bar;
}
m_s2ccipher.init(jsch.Cipher.DECRYPT_MODE, m_Es2c, m_IVs2c);
m_cipher_size = m_s2ccipher.IVSize;
c = Class.ForName(getConfig(guess[KeyExchange.PROPOSAL_MAC_ALGS_STOC]));
m_s2cmac = (MAC)(c.Instance());
m_s2cmac.init(m_MACs2c);
m_mac_buf = new byte[m_s2cmac.BlockSize];
c = Class.ForName(getConfig(guess[KeyExchange.PROPOSAL_ENC_ALGS_CTOS]));
m_c2scipher = (Cipher)(c.Instance());
while (m_c2scipher.BlockSize > m_Ec2s.Length)
{
m_buf.reset();
m_buf.putMPInt(K);
m_buf.putByte(H);
m_buf.putByte(m_Ec2s);
hash.update(m_buf.m_buffer, 0, m_buf.m_index);
byte[] foo = hash.digest();
byte[] bar = new byte[m_Ec2s.Length + foo.Length];
Array.Copy(m_Ec2s, 0, bar, 0, m_Ec2s.Length);
Array.Copy(foo, 0, bar, m_Ec2s.Length, foo.Length);
m_Ec2s = bar;
}
m_c2scipher.init(jsch.Cipher.ENCRYPT_MODE, m_Ec2s, m_IVc2s);
c = Class.ForName(getConfig(guess[KeyExchange.PROPOSAL_MAC_ALGS_CTOS]));
m_c2smac = (MAC)(c.Instance());
m_c2smac.init(m_MACc2s);
if (!guess[KeyExchange.PROPOSAL_COMP_ALGS_CTOS].Equals("none"))
{
string foo = getConfig(guess[KeyExchange.PROPOSAL_COMP_ALGS_CTOS]);
if (foo != null)
{
try
{
c = Class.ForName(foo);
m_deflater = (Compression)(c.Instance());
int level = 6;
try
{
level = int.Parse(getConfig("compression_level"));
}
catch (Exception)
{ }
m_deflater.init(Compression.DEFLATER, level);
}
catch (Exception)
{
Console.Error.WriteLine(foo + " isn't accessible.");
}
}
}
else
{
if (m_deflater != null)
m_deflater = null;
}
if (!guess[KeyExchange.PROPOSAL_COMP_ALGS_STOC].Equals("none"))
{
string foo = getConfig(guess[KeyExchange.PROPOSAL_COMP_ALGS_STOC]);
if (foo != null)
{
try
{
c = Class.ForName(foo);
m_inflater = (Compression)(c.Instance());
m_inflater.init(Compression.INFLATER, 0);
}
catch (Exception)
{
Console.Error.WriteLine(foo + " isn't accessible.");
}
}
}
else
{
if (m_inflater != null)
m_inflater = null;
}
}
catch (Exception e) { Console.Error.WriteLine("updatekeys: " + e); }
}
/// <exception cref="NSch.JSchException"></exception>
/// <exception cref="System.IO.IOException"></exception>
private void Start_discard(Buffer buf, NSch.Cipher cipher, MAC mac, int packet_length
, int discard)
{
MAC discard_mac = null;
if (!cipher.IsCBC())
{
throw new JSchException("Packet corrupt");
}
if (packet_length != PACKET_MAX_SIZE && mac != null)
{
discard_mac = mac;
}
discard -= buf.index;
while (discard > 0)
{
buf.Reset();
int len = discard > buf.buffer.Length ? buf.buffer.Length : discard;
io.GetByte(buf.buffer, 0, len);
if (discard_mac != null)
{
discard_mac.Update(buf.buffer, 0, len);
}
discard -= len;
}
if (discard_mac != null)
{
discard_mac.DoFinal(buf.buffer, 0);
}
throw new JSchException("Packet corrupt");
}
/// <exception cref="System.Exception"></exception>
private void UpdateKeys(KeyExchange kex)
{
byte[] K = kex.GetK();
byte[] H = kex.GetH();
HASH hash = kex.GetHash();
// String[] guess=kex.guess;
if (session_id == null)
{
session_id = new byte[H.Length];
System.Array.Copy(H, 0, session_id, 0, H.Length);
}
buf.Reset();
buf.PutMPInt(K);
buf.PutByte(H);
buf.PutByte(unchecked((byte)unchecked((int)(0x41))));
buf.PutByte(session_id);
hash.Update(buf.buffer, 0, buf.index);
IVc2s = hash.Digest();
int j = buf.index - session_id.Length - 1;
buf.buffer[j]++;
hash.Update(buf.buffer, 0, buf.index);
IVs2c = hash.Digest();
buf.buffer[j]++;
hash.Update(buf.buffer, 0, buf.index);
Ec2s = hash.Digest();
buf.buffer[j]++;
hash.Update(buf.buffer, 0, buf.index);
Es2c = hash.Digest();
buf.buffer[j]++;
hash.Update(buf.buffer, 0, buf.index);
MACc2s = hash.Digest();
buf.buffer[j]++;
hash.Update(buf.buffer, 0, buf.index);
MACs2c = hash.Digest();
try
{
Type c;
string method;
method = guess[KeyExchange.PROPOSAL_ENC_ALGS_STOC];
c = Sharpen.Runtime.GetType(GetConfig(method));
s2ccipher = (NSch.Cipher)(System.Activator.CreateInstance(c));
while (s2ccipher.GetBlockSize() > Es2c.Length)
{
buf.Reset();
buf.PutMPInt(K);
buf.PutByte(H);
buf.PutByte(Es2c);
hash.Update(buf.buffer, 0, buf.index);
byte[] foo = hash.Digest();
byte[] bar = new byte[Es2c.Length + foo.Length];
System.Array.Copy(Es2c, 0, bar, 0, Es2c.Length);
System.Array.Copy(foo, 0, bar, Es2c.Length, foo.Length);
Es2c = bar;
}
s2ccipher.Init(NSch.Cipher.DECRYPT_MODE, Es2c, IVs2c);
s2ccipher_size = s2ccipher.GetIVSize();
method = guess[KeyExchange.PROPOSAL_MAC_ALGS_STOC];
c = Sharpen.Runtime.GetType(GetConfig(method));
s2cmac = (MAC)(System.Activator.CreateInstance(c));
s2cmac.Init(MACs2c);
//mac_buf=new byte[s2cmac.getBlockSize()];
s2cmac_result1 = new byte[s2cmac.GetBlockSize()];
s2cmac_result2 = new byte[s2cmac.GetBlockSize()];
method = guess[KeyExchange.PROPOSAL_ENC_ALGS_CTOS];
c = Sharpen.Runtime.GetType(GetConfig(method));
c2scipher = (NSch.Cipher)(System.Activator.CreateInstance(c));
while (c2scipher.GetBlockSize() > Ec2s.Length)
{
buf.Reset();
buf.PutMPInt(K);
buf.PutByte(H);
buf.PutByte(Ec2s);
hash.Update(buf.buffer, 0, buf.index);
byte[] foo = hash.Digest();
byte[] bar = new byte[Ec2s.Length + foo.Length];
System.Array.Copy(Ec2s, 0, bar, 0, Ec2s.Length);
System.Array.Copy(foo, 0, bar, Ec2s.Length, foo.Length);
Ec2s = bar;
}
c2scipher.Init(NSch.Cipher.ENCRYPT_MODE, Ec2s, IVc2s);
c2scipher_size = c2scipher.GetIVSize();
method = guess[KeyExchange.PROPOSAL_MAC_ALGS_CTOS];
c = Sharpen.Runtime.GetType(GetConfig(method));
c2smac = (MAC)(System.Activator.CreateInstance(c));
c2smac.Init(MACc2s);
method = guess[KeyExchange.PROPOSAL_COMP_ALGS_CTOS];
InitDeflater(method);
method = guess[KeyExchange.PROPOSAL_COMP_ALGS_STOC];
InitInflater(method);
}
catch (Exception e)
{
if (e is JSchException)
{
throw;
}
throw new JSchException(e.ToString(), e);
}
}
private void updateKeys(KeyExchange kex)
{
byte[] K=kex.getK();
byte[] H=kex.getH();
HASH hash=kex.getHash();
String[] guess=kex._guess;
if(session_id==null)
{
session_id=new byte[H.Length];
Tamir.SharpSsh.java.System.arraycopy(H, 0, session_id, 0, H.Length);
}
/*
Initial IV client to server: HASH (K || H || "A" || session_id)
Initial IV server to client: HASH (K || H || "B" || session_id)
Encryption key client to server: HASH (K || H || "C" || session_id)
Encryption key server to client: HASH (K || H || "D" || session_id)
Integrity key client to server: HASH (K || H || "E" || session_id)
Integrity key server to client: HASH (K || H || "F" || session_id)
*/
buf.reset();
buf.putMPInt(K);
buf.putByte(H);
buf.putByte((byte)0x41);
buf.putByte(session_id);
hash.update(buf.buffer, 0, buf.index);
IVc2s=hash.digest();
int j=buf.index-session_id.Length-1;
buf.buffer[j]++;
hash.update(buf.buffer, 0, buf.index);
IVs2c=hash.digest();
buf.buffer[j]++;
hash.update(buf.buffer, 0, buf.index);
Ec2s=hash.digest();
buf.buffer[j]++;
hash.update(buf.buffer, 0, buf.index);
Es2c=hash.digest();
buf.buffer[j]++;
hash.update(buf.buffer, 0, buf.index);
MACc2s=hash.digest();
buf.buffer[j]++;
hash.update(buf.buffer, 0, buf.index);
MACs2c=hash.digest();
try
{
Class c;
c=Class.forName(getConfig(guess[KeyExchange.PROPOSAL_ENC_ALGS_STOC]));
s2ccipher=(Cipher)(c.newInstance());
while(s2ccipher.getBlockSize()>Es2c.Length)
{
buf.reset();
buf.putMPInt(K);
buf.putByte(H);
buf.putByte(Es2c);
hash.update(buf.buffer, 0, buf.index);
byte[] foo=hash.digest();
byte[] bar=new byte[Es2c.Length+foo.Length];
Tamir.SharpSsh.java.System.arraycopy(Es2c, 0, bar, 0, Es2c.Length);
Tamir.SharpSsh.java.System.arraycopy(foo, 0, bar, Es2c.Length, foo.Length);
Es2c=bar;
}
s2ccipher.init(Cipher.DECRYPT_MODE, Es2c, IVs2c);
cipher_size=s2ccipher.getIVSize();
c=Class.forName(getConfig(guess[KeyExchange.PROPOSAL_MAC_ALGS_STOC]));
s2cmac=(MAC)(c.newInstance());
s2cmac.init(MACs2c);
mac_buf=new byte[s2cmac.getBlockSize()];
c=Class.forName(getConfig(guess[KeyExchange.PROPOSAL_ENC_ALGS_CTOS]));
c2scipher=(Cipher)(c.newInstance());
while(c2scipher.getBlockSize()>Ec2s.Length)
{
buf.reset();
buf.putMPInt(K);
buf.putByte(H);
buf.putByte(Ec2s);
hash.update(buf.buffer, 0, buf.index);
byte[] foo=hash.digest();
byte[] bar=new byte[Ec2s.Length+foo.Length];
Tamir.SharpSsh.java.System.arraycopy(Ec2s, 0, bar, 0, Ec2s.Length);
Tamir.SharpSsh.java.System.arraycopy(foo, 0, bar, Ec2s.Length, foo.Length);
Ec2s=bar;
}
c2scipher.init(Cipher.ENCRYPT_MODE, Ec2s, IVc2s);
c=Class.forName(getConfig(guess[KeyExchange.PROPOSAL_MAC_ALGS_CTOS]));
c2smac=(MAC)(c.newInstance());
c2smac.init(MACc2s);
if(!guess[KeyExchange.PROPOSAL_COMP_ALGS_CTOS].equals("none"))
{
String foo=getConfig(guess[KeyExchange.PROPOSAL_COMP_ALGS_CTOS]);
if(foo!=null)
{
try
{
c=Class.forName(foo);
deflater=(Compression)(c.newInstance());
int level=6;
try{ level=Integer.parseInt(getConfig("compression_level"));}
catch(Exception ee){ }
deflater.init(Compression.DEFLATER, level);
}
catch(Exception ee)
{
System.Console.Error.WriteLine(foo+" isn't accessible.");
}
}
}
else
{
if(deflater!=null)
{
deflater=null;
}
}
if(!guess[KeyExchange.PROPOSAL_COMP_ALGS_STOC].equals("none"))
{
String foo=getConfig(guess[KeyExchange.PROPOSAL_COMP_ALGS_STOC]);
if(foo!=null)
{
try
{
c=Class.forName(foo);
inflater=(Compression)(c.newInstance());
inflater.init(Compression.INFLATER, 0);
}
catch(Exception ee)
{
System.Console.Error.WriteLine(foo+" isn't accessible.");
}
}
}
else
{
if(inflater!=null)
{
inflater=null;
}
}
}
catch(Exception e){ System.Console.Error.WriteLine("updatekeys: "+e); }
}
private MAC GetHMACSHA1()
{
lock (this)
{
if (hmacsha1 == null)
{
try
{
Type c = Sharpen.Runtime.GetType(JSch.GetConfig("hmac-sha1"));
hmacsha1 = (MAC)(System.Activator.CreateInstance(c));
}
catch (Exception e)
{
System.Console.Error.WriteLine("hmacsha1: " + e);
}
}
return hmacsha1;
}
}