private Cipher genCipher()
{
try
{
Type t;
t=Type.GetType(jsch.getConfig("3des-cbc"));
cipher=(Cipher)(Activator.CreateInstance(t));
}
catch//(Exception e)
{
}
return cipher;
}
private byte[] encrypt(byte[] plain, byte[][] _iv)
{
if(passphrase==null) return plain;
if(cipher==null) cipher=genCipher();
byte[] iv=_iv[0]=new byte[cipher.getIVSize()];
if(random==null) random=genRandom();
random.fill(iv, 0, iv.Length);
byte[] key=genKey(passphrase, iv);
byte[] encoded=plain;
int bsize=cipher.getBlockSize();
if(encoded.Length%bsize!=0)
{
byte[] foo=new byte[(encoded.Length/bsize+1)*bsize];
Array.Copy(encoded, 0, foo, 0, encoded.Length);
encoded=foo;
}
try
{
cipher.init(Cipher.ENCRYPT_MODE, key, iv);
cipher.update(encoded, 0, encoded.Length, encoded, 0);
}
catch(Exception e)
{
Console.WriteLine(e);
}
return encoded;
}
internal IdentityFile(String identity, JSch jsch)
{
this.identity=identity;
this.jsch=jsch;
try
{
Type c=Type.GetType(jsch.getConfig("3des-cbc"));
cipher=(Cipher)Activator.CreateInstance(c);
key=new byte[cipher.getBlockSize()]; // 24
iv=new byte[cipher.getIVSize()]; // 8
c=Type.GetType(jsch.getConfig("md5"));
hash=(HASH)(Activator.CreateInstance(c));
hash.init();
FileInfo file=new FileInfo(identity);
FileStream fis = File.OpenRead(identity);
byte[] buf=new byte[(int)(file.Length)];
int len=fis.Read(buf, 0, buf.Length);
fis.Close();
int i=0;
while(i<len)
{
if(buf[i]=='B'&& buf[i+1]=='E'&& buf[i+2]=='G'&& buf[i+3]=='I')
{
i+=6;
if(buf[i]=='D'&& buf[i+1]=='S'&& buf[i+2]=='A'){ type=DSS; }
else if(buf[i]=='R'&& buf[i+1]=='S'&& buf[i+2]=='A'){ type=RSA; }
else if(buf[i]=='S'&& buf[i+1]=='S'&& buf[i+2]=='H')
{ // FSecure
type=UNKNOWN;
keytype=FSECURE;
}
else
{
//System.out.println("invalid format: "+identity);
throw new JSchException("invaid privatekey: "+identity);
}
i+=3;
continue;
}
if(buf[i]=='C'&& buf[i+1]=='B'&& buf[i+2]=='C'&& buf[i+3]==',')
{
i+=4;
for(int ii=0; ii<iv.Length; ii++)
{
iv[ii]=(byte)(((a2b(buf[i++])<<4)&0xf0)+
(a2b(buf[i++])&0xf));
}
continue;
}
if(buf[i]==0x0d &&
i+1<buf.Length && buf[i+1]==0x0a)
{
i++;
continue;
}
if(buf[i]==0x0a && i+1<buf.Length)
{
if(buf[i+1]==0x0a){ i+=2; break; }
if(buf[i+1]==0x0d &&
i+2<buf.Length && buf[i+2]==0x0a)
{
i+=3; break;
}
bool inheader=false;
for(int j=i+1; j<buf.Length; j++)
{
if(buf[j]==0x0a) break;
//if(buf[j]==0x0d) break;
if(buf[j]==':'){inheader=true; break;}
}
if(!inheader)
{
i++;
encrypted=false; // no passphrase
break;
}
}
i++;
}
if(type==ERROR)
{
throw new JSchException("invaid privatekey: "+identity);
}
int start=i;
while(i<len)
{
if(buf[i]==0x0a)
{
bool xd=(buf[i-1]==0x0d);
Array.Copy(buf, i+1,
buf,
i-(xd ? 1 : 0),
len-i-1-(xd ? 1 : 0)
);
if(xd)len--;
len--;
continue;
}
if(buf[i]=='-'){ break; }
i++;
}
encoded_data=Util.fromBase64(buf, start, i-start);
if(encoded_data.Length>4 && // FSecure
encoded_data[0]==(byte)0x3f &&
encoded_data[1]==(byte)0x6f &&
encoded_data[2]==(byte)0xf9 &&
encoded_data[3]==(byte)0xeb)
{
Buffer _buf=new Buffer(encoded_data);
_buf.getInt(); // 0x3f6ff9be
_buf.getInt();
byte[]_type=_buf.getString();
//System.out.println("type: "+new String(_type));
byte[] _cipher=_buf.getString();
String s_cipher=System.Text.Encoding.Default.GetString(_cipher);
//System.out.println("cipher: "+cipher);
if(s_cipher.Equals("3des-cbc"))
{
_buf.getInt();
byte[] foo=new byte[encoded_data.Length-_buf.getOffSet()];
_buf.getByte(foo);
encoded_data=foo;
encrypted=true;
throw new JSchException("unknown privatekey format: "+identity);
}
else if(s_cipher.Equals("none"))
{
_buf.getInt();
//_buf.getInt();
encrypted=false;
byte[] foo=new byte[encoded_data.Length-_buf.getOffSet()];
_buf.getByte(foo);
encoded_data=foo;
}
}
try
{
file=new FileInfo(identity+".pub");
fis=File.OpenRead(identity+".pub");
buf=new byte[(int)(file.Length)];
len=fis.Read(buf, 0, buf.Length);
fis.Close();
}
catch
{
return;
}
if(buf.Length>4 && // FSecure's public key
buf[0]=='-' && buf[1]=='-' && buf[2]=='-' && buf[3]=='-')
{
i=0;
do{i++;}while(buf.Length>i && buf[i]!=0x0a);
if(buf.Length<=i) return;
while(true)
{
if(buf[i]==0x0a)
{
bool inheader=false;
for(int j=i+1; j<buf.Length; j++)
{
if(buf[j]==0x0a) break;
if(buf[j]==':'){inheader=true; break;}
}
if(!inheader)
{
i++;
break;
}
}
i++;
}
if(buf.Length<=i) return;
start=i;
while(i<len)
{
if(buf[i]==0x0a)
{
Array.Copy(buf, i+1, buf, i, len-i-1);
len--;
continue;
}
if(buf[i]=='-'){ break; }
i++;
}
publickeyblob=Util.fromBase64(buf, start, i-start);
if(type==UNKNOWN)
{
if(publickeyblob[8]=='d')
{
type=DSS;
}
else if(publickeyblob[8]=='r')
{
type=RSA;
}
}
}
else
{
if(buf[0]!='s'|| buf[1]!='s'|| buf[2]!='h'|| buf[3]!='-') return;
i=0;
while(i<len){ if(buf[i]==' ')break; i++;} i++;
if(i>=len) return;
start=i;
while(i<len){ if(buf[i]==' ')break; i++;}
publickeyblob=Util.fromBase64(buf, start, i-start);
}
}
catch(Exception e)
{
Console.WriteLine("Identity: "+e);
if(e is JSchException) throw (JSchException)e;
throw new JSchException(e.ToString());
}
}
internal byte[] genKey(byte[] passphrase, byte[] iv)
{
if(cipher==null) cipher=genCipher();
if(hash==null) hash=genHash();
byte[] key=new byte[cipher.getBlockSize()];
int hsize=hash.getBlockSize();
byte[] hn=new byte[key.Length/hsize*hsize+
(key.Length%hsize==0?0:hsize)];
try
{
byte[] tmp=null;
if(vendor==VENDOR_OPENSSH)
{
for(int index=0; index+hsize<=hn.Length;)
{
if(tmp!=null){ hash.update(tmp, 0, tmp.Length); }
hash.update(passphrase, 0, passphrase.Length);
hash.update(iv, 0, iv.Length);
tmp=hash.digest();
Array.Copy(tmp, 0, hn, index, tmp.Length);
index+=tmp.Length;
}
Array.Copy(hn, 0, key, 0, key.Length);
}
else if(vendor==VENDOR_FSECURE)
{
for(int index=0; index+hsize<=hn.Length;)
{
if(tmp!=null){ hash.update(tmp, 0, tmp.Length); }
hash.update(passphrase, 0, passphrase.Length);
tmp=hash.digest();
Array.Copy(tmp, 0, hn, index, tmp.Length);
index+=tmp.Length;
}
Array.Copy(hn, 0, key, 0, key.Length);
}
}
catch(Exception e)
{
Console.WriteLine(e);
}
return key;
}
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];
SharpSSH.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];
SharpSSH.SharpSsh.java.System.arraycopy(Es2c, 0, bar, 0, Es2c.Length);
SharpSSH.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];
SharpSSH.SharpSsh.java.System.arraycopy(Ec2s, 0, bar, 0, Ec2s.Length);
SharpSSH.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); }
}
