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];
System.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] = unchecked ((byte)padding);
}
encoded = foo;
}
try
{
cipher.Init(NSch.Cipher.ENCRYPT_MODE, key, iv);
cipher.Update(encoded, 0, encoded.Length, encoded, 0);
}
catch (Exception)
{
}
//System.err.println(e);
Util.Bzero(key);
return(encoded);
}
internal virtual 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(NSch.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(NSch.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] != unchecked ((int)(0x30)))
{
return(false);
}
index++;
// SEQUENCE
length = plain[index++] & unchecked ((int)(0xff));
if ((length & unchecked ((int)(0x80))) != 0)
{
int foo = length & unchecked ((int)(0x7f));
length = 0;
while (foo-- > 0)
{
length = (length << 8) + (plain[index++] & unchecked ((int)(0xff)));
}
}
if (plain[index] != unchecked ((int)(0x02)))
{
return(false);
}
index++;
// INTEGER
length = plain[index++] & unchecked ((int)(0xff));
if ((length & unchecked ((int)(0x80))) != 0)
{
int foo = length & unchecked ((int)(0x7f));
length = 0;
while (foo-- > 0)
{
length = (length << 8) + (plain[index++] & unchecked ((int)(0xff)));
}
}
index += length;
//System.err.println("int: len="+length);
//System.err.print(Integer.toHexString(plain[index-1]&0xff)+":");
//System.err.println("");
index++;
length = plain[index++] & unchecked ((int)(0xff));
if ((length & unchecked ((int)(0x80))) != 0)
{
int foo = length & unchecked ((int)(0x7f));
length = 0;
while (foo-- > 0)
{
length = (length << 8) + (plain[index++] & unchecked ((int)(0xff)));
}
}
n_array = new byte[length];
System.Array.Copy(plain, index, n_array, 0, length);
index += length;
index++;
length = plain[index++] & unchecked ((int)(0xff));
if ((length & unchecked ((int)(0x80))) != 0)
{
int foo = length & unchecked ((int)(0x7f));
length = 0;
while (foo-- > 0)
{
length = (length << 8) + (plain[index++] & unchecked ((int)(0xff)));
}
}
e_array = new byte[length];
System.Array.Copy(plain, index, e_array, 0, length);
index += length;
index++;
length = plain[index++] & unchecked ((int)(0xff));
if ((length & unchecked ((int)(0x80))) != 0)
{
int foo = length & unchecked ((int)(0x7f));
length = 0;
while (foo-- > 0)
{
length = (length << 8) + (plain[index++] & unchecked ((int)(0xff)));
}
}
d_array = new byte[length];
System.Array.Copy(plain, index, d_array, 0, length);
index += length;
index++;
length = plain[index++] & unchecked ((int)(0xff));
if ((length & unchecked ((int)(0x80))) != 0)
{
int foo = length & unchecked ((int)(0x7f));
length = 0;
while (foo-- > 0)
{
length = (length << 8) + (plain[index++] & unchecked ((int)(0xff)));
}
}
p_array = new byte[length];
System.Array.Copy(plain, index, p_array, 0, length);
index += length;
index++;
length = plain[index++] & unchecked ((int)(0xff));
if ((length & unchecked ((int)(0x80))) != 0)
{
int foo = length & unchecked ((int)(0x7f));
length = 0;
while (foo-- > 0)
{
length = (length << 8) + (plain[index++] & unchecked ((int)(0xff)));
}
}
q_array = new byte[length];
System.Array.Copy(plain, index, q_array, 0, length);
index += length;
index++;
length = plain[index++] & unchecked ((int)(0xff));
if ((length & unchecked ((int)(0x80))) != 0)
{
int foo = length & unchecked ((int)(0x7f));
length = 0;
while (foo-- > 0)
{
length = (length << 8) + (plain[index++] & unchecked ((int)(0xff)));
}
}
dmp1_array = new byte[length];
System.Array.Copy(plain, index, dmp1_array, 0, length);
index += length;
index++;
length = plain[index++] & unchecked ((int)(0xff));
if ((length & unchecked ((int)(0x80))) != 0)
{
int foo = length & unchecked ((int)(0x7f));
length = 0;
while (foo-- > 0)
{
length = (length << 8) + (plain[index++] & unchecked ((int)(0xff)));
}
}
dmq1_array = new byte[length];
System.Array.Copy(plain, index, dmq1_array, 0, length);
index += length;
index++;
length = plain[index++] & unchecked ((int)(0xff));
if ((length & unchecked ((int)(0x80))) != 0)
{
int foo = length & unchecked ((int)(0x7f));
length = 0;
while (foo-- > 0)
{
length = (length << 8) + (plain[index++] & unchecked ((int)(0xff)));
}
}
iqmp_array = new byte[length];
System.Array.Copy(plain, index, iqmp_array, 0, length);
index += length;
}
catch (Exception)
{
//System.err.println(e);
return(false);
}
return(true);
}
