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;
// PKCS#5Padding
{
//int bsize=cipher.getBlockSize();
int bsize = cipher.getIVSize();
byte[] foo = new byte[(encoded.Length / bsize + 1) * bsize];
Array.Copy(encoded, 0, foo, 0, encoded.Length);
int padding = bsize - encoded.Length % bsize;
for (int i = foo.Length - 1; (foo.Length - padding) <= i; i--)
{
foo[i] = (byte)padding;
}
encoded = foo;
}
try
{
cipher.init(Cipher.ENCRYPT_MODE, key, iv);
cipher.update(encoded, 0, encoded.Length, encoded, 0);
}
catch //(Exception e)
{
//Console.Error.WriteLine(e);
}
Util.bzero(key);
return(encoded);
}
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);
}
}
bool decrypt_rsa()
{
byte[] p_array;
byte[] q_array;
byte[] dmp1_array;
byte[] dmq1_array;
byte[] iqmp_array;
try
{
byte[] plain;
if (encrypted)
{
if (keytype == OPENSSH)
{
cipher.init(Cipher.DECRYPT_MODE, key, iv);
plain = new byte[encoded_data.Length];
cipher.update(encoded_data, 0, encoded_data.Length, plain, 0);
}
else if (keytype == FSECURE)
{
for (int i = 0; i < iv.Length; i++)
{
iv[i] = 0;
}
cipher.init(Cipher.DECRYPT_MODE, key, iv);
plain = new byte[encoded_data.Length];
cipher.update(encoded_data, 0, encoded_data.Length, plain, 0);
}
else
{
return(false);
}
}
else
{
if (n_array != null)
{
return(true);
}
plain = encoded_data;
}
if (keytype == FSECURE)
{ // FSecure
Buffer buf = new Buffer(plain);
int foo = buf.getInt();
if (plain.Length != foo + 4)
{
return(false);
}
e_array = buf.getMPIntBits();
d_array = buf.getMPIntBits();
n_array = buf.getMPIntBits();
byte[] u_array = buf.getMPIntBits();
p_array = buf.getMPIntBits();
q_array = buf.getMPIntBits();
return(true);
}
int index = 0;
int length = 0;
if (plain[index] != 0x30)
{
return(false);
}
index++; // SEQUENCE
length = plain[index++] & 0xff;
if ((length & 0x80) != 0)
{
int foo = length & 0x7f; length = 0;
while (foo-- > 0)
{
length = (length << 8) + (plain[index++] & 0xff);
}
}
if (plain[index] != 0x02)
{
return(false);
}
index++; // INTEGER
length = plain[index++] & 0xff;
if ((length & 0x80) != 0)
{
int foo = length & 0x7f; length = 0;
while (foo-- > 0)
{
length = (length << 8) + (plain[index++] & 0xff);
}
}
index += length;
//Console.Error.WriteLine("int: len="+length);
//System.err.print(Integer.toHexString(plain[index-1]&0xff)+":");
//Console.Error.WriteLine("");
index++;
length = plain[index++] & 0xff;
if ((length & 0x80) != 0)
{
int foo = length & 0x7f; length = 0;
while (foo-- > 0)
{
length = (length << 8) + (plain[index++] & 0xff);
}
}
n_array = new byte[length];
Array.Copy(plain, index, n_array, 0, length);
index += length;
/*
* Console.Error.WriteLine("int: N len="+length);
* for(int i=0; i<n_array.Length; i++){
* System.err.print(Integer.toHexString(n_array[i]&0xff)+":");
* }
* Console.Error.WriteLine("");
*/
index++;
length = plain[index++] & 0xff;
if ((length & 0x80) != 0)
{
int foo = length & 0x7f; length = 0;
while (foo-- > 0)
{
length = (length << 8) + (plain[index++] & 0xff);
}
}
e_array = new byte[length];
Array.Copy(plain, index, e_array, 0, length);
index += length;
/*
* Console.Error.WriteLine("int: E len="+length);
* for(int i=0; i<e_array.Length; i++){
* System.err.print(Integer.toHexString(e_array[i]&0xff)+":");
* }
* Console.Error.WriteLine("");
*/
index++;
length = plain[index++] & 0xff;
if ((length & 0x80) != 0)
{
int foo = length & 0x7f; length = 0;
while (foo-- > 0)
{
length = (length << 8) + (plain[index++] & 0xff);
}
}
d_array = new byte[length];
Array.Copy(plain, index, d_array, 0, length);
index += length;
/*
* Console.Error.WriteLine("int: D len="+length);
* for(int i=0; i<d_array.Length; i++){
* System.err.print(Integer.toHexString(d_array[i]&0xff)+":");
* }
* Console.Error.WriteLine("");
*/
index++;
length = plain[index++] & 0xff;
if ((length & 0x80) != 0)
{
int foo = length & 0x7f; length = 0;
while (foo-- > 0)
{
length = (length << 8) + (plain[index++] & 0xff);
}
}
p_array = new byte[length];
Array.Copy(plain, index, p_array, 0, length);
index += length;
/*
* Console.Error.WriteLine("int: P len="+length);
* for(int i=0; i<p_array.Length; i++){
* System.err.print(Integer.toHexString(p_array[i]&0xff)+":");
* }
* Console.Error.WriteLine("");
*/
index++;
length = plain[index++] & 0xff;
if ((length & 0x80) != 0)
{
int foo = length & 0x7f; length = 0;
while (foo-- > 0)
{
length = (length << 8) + (plain[index++] & 0xff);
}
}
q_array = new byte[length];
Array.Copy(plain, index, q_array, 0, length);
index += length;
/*
* Console.Error.WriteLine("int: q len="+length);
* for(int i=0; i<q_array.Length; i++){
* System.err.print(Integer.toHexString(q_array[i]&0xff)+":");
* }
* Console.Error.WriteLine("");
*/
index++;
length = plain[index++] & 0xff;
if ((length & 0x80) != 0)
{
int foo = length & 0x7f; length = 0;
while (foo-- > 0)
{
length = (length << 8) + (plain[index++] & 0xff);
}
}
dmp1_array = new byte[length];
Array.Copy(plain, index, dmp1_array, 0, length);
index += length;
/*
* Console.Error.WriteLine("int: dmp1 len="+length);
* for(int i=0; i<dmp1_array.Length; i++){
* System.err.print(Integer.toHexString(dmp1_array[i]&0xff)+":");
* }
* Console.Error.WriteLine("");
*/
index++;
length = plain[index++] & 0xff;
if ((length & 0x80) != 0)
{
int foo = length & 0x7f; length = 0;
while (foo-- > 0)
{
length = (length << 8) + (plain[index++] & 0xff);
}
}
dmq1_array = new byte[length];
Array.Copy(plain, index, dmq1_array, 0, length);
index += length;
/*
* Console.Error.WriteLine("int: dmq1 len="+length);
* for(int i=0; i<dmq1_array.Length; i++){
* System.err.print(Integer.toHexString(dmq1_array[i]&0xff)+":");
* }
* Console.Error.WriteLine("");
*/
index++;
length = plain[index++] & 0xff;
if ((length & 0x80) != 0)
{
int foo = length & 0x7f; length = 0;
while (foo-- > 0)
{
length = (length << 8) + (plain[index++] & 0xff);
}
}
iqmp_array = new byte[length];
Array.Copy(plain, index, iqmp_array, 0, length);
index += length;
/*
* Console.Error.WriteLine("int: iqmp len="+length);
* for(int i=0; i<iqmp_array.Length; i++){
* System.err.print(Integer.toHexString(iqmp_array[i]&0xff)+":");
* }
* Console.Error.WriteLine("");
*/
}
catch //(Exception e)
{
//Console.Error.WriteLine(e);
return(false);
}
return(true);
}
