I'm having trouble as I get an exception of Invalid Data, sent from code:
Is there something I'm missing?
Here's my AES256CBC.cs:
It's basically a copy of AES128CBC.cs with changes for 256.
I'm not sure why it's freaking out.
See below the code for exception details:
///////////////////////////////////////////////////////
using System;
using System.Security.Cryptography;
namespace Tamir.SharpSsh.jsch.jce
{
/*r_achmann 17AUG2008 this version if added to support AES 256 */
/* -*-mode:java; c-basic-offset:2; -*- */
/*
Copyright (c) 2002,2003,2004 ymnk, JCraft,Inc. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the distribution.
3. The names of the authors may not be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT,
INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
public class AES256CBC : Cipher
{
private int mode;
private const int ivsize = 32;
private const int bsize = 16;
private System.Security.Cryptography.RijndaelManaged rijndael;
private ICryptoTransform cipher;
public override int getIVSize() { return ivsize; }
public override int getBlockSize() { return bsize; }
public override void init(int mode, byte[] key, byte[] iv)
{
this.mode = mode;
rijndael = new RijndaelManaged();
rijndael.Mode = CipherMode.CBC;
rijndael.Padding = PaddingMode.Zeros;
rijndael.BlockSize = 256;
rijndael.KeySize = 256;
// cipher.init((mode==ENCRYPT_MODE?
// javax.crypto.Cipher.ENCRYPT_MODE:
// javax.crypto.Cipher.DECRYPT_MODE),
// keyspec, new IvParameterSpec(iv));
cipher = (mode == ENCRYPT_MODE ?
rijndael.CreateEncryptor(key, iv) :
rijndael.CreateDecryptor(key, iv));
}
catch (Exception e)
{
Console.WriteLine(e);
cipher = null;
}
}
public override void update(byte[] foo, int s1, int len, byte[] bar, int s2)
{
//cipher.update(foo, s1, len, bar, s2);
cipher.TransformBlock(foo, s1, len, bar, s2);
}
public override string ToString()
{
return "aes256-cbc";
}
}
}
///////////////////////////////////////////////////////
///////////////////////////////////////////////////////
///////////////////////////////////////////////////////
the exception happens in read - see stacktrace below it...
Hi.
I'm trying to implement aes256-cbc.
I'm having trouble as I get an exception of Invalid Data, sent from code:
Is there something I'm missing?
Here's my AES256CBC.cs:
It's basically a copy of AES128CBC.cs with changes for 256.
I'm not sure why it's freaking out.
See below the code for exception details:
///////////////////////////////////////////////////////
using System;
using System.Security.Cryptography;
namespace Tamir.SharpSsh.jsch.jce
{
/*r_achmann 17AUG2008 this version if added to support AES 256 */
/* -*-mode:java; c-basic-offset:2; -*- */
/*
Copyright (c) 2002,2003,2004 ymnk, JCraft,Inc. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the distribution.
3. The names of the authors may not be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT,
INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
public class AES256CBC : Cipher
{
private int mode;
private const int ivsize = 32;
private const int bsize = 16;
private System.Security.Cryptography.RijndaelManaged rijndael;
private ICryptoTransform cipher;
public override int getIVSize() { return ivsize; }
public override int getBlockSize() { return bsize; }
public override void init(int mode, byte[] key, byte[] iv)
{
this.mode = mode;
rijndael = new RijndaelManaged();
rijndael.Mode = CipherMode.CBC;
rijndael.Padding = PaddingMode.Zeros;
rijndael.BlockSize = 256;
rijndael.KeySize = 256;
byte[] tmp;
if (iv.Length != ivsize)
{
tmp=new byte[ivsize];
if (iv.Length > ivsize)
Array.Copy(iv, 0, tmp, 0, tmp.Length);
else
Array.Copy(iv, 0, tmp, 0, iv.Length);
//tmp = rijndael.IV;
iv = tmp;
}
if (key.Length != bsize)
{
tmp=new byte[bsize];
if (key.Length > bsize)
Array.Copy(key, 0, tmp, 0, tmp.Length);
else
Array.Copy(key, 0, tmp, 0, key.Length);
// tmp = rijndael.Key;
key = tmp;
}
try
{
// SecretKeySpec keyspec=new SecretKeySpec(key, "AES");
// cipher=javax.crypto.Cipher.getInstance("AES/CBC/"+pad);
// cipher.init((mode==ENCRYPT_MODE?
// javax.crypto.Cipher.ENCRYPT_MODE:
// javax.crypto.Cipher.DECRYPT_MODE),
// keyspec, new IvParameterSpec(iv));
cipher = (mode == ENCRYPT_MODE ?
rijndael.CreateEncryptor(key, iv) :
rijndael.CreateDecryptor(key, iv));
}
catch (Exception e)
{
Console.WriteLine(e);
cipher = null;
}
}
public override void update(byte[] foo, int s1, int len, byte[] bar, int s2)
{
//cipher.update(foo, s1, len, bar, s2);
cipher.TransformBlock(foo, s1, len, bar, s2);
}
public override string ToString()
{
return "aes256-cbc";
}
}
}
///////////////////////////////////////////////////////
///////////////////////////////////////////////////////
///////////////////////////////////////////////////////
the exception happens in read - see stacktrace below it...
public Buffer read(Buffer buf)
{
int j = 0;
while (true)
{
buf.reset();
io.getByte(buf.buffer, buf.index, cipher_size);
buf.index += cipher_size;
if (s2ccipher != null)
{
s2ccipher.update(buf.buffer, 0, cipher_size, buf.buffer, 0);
}
// j=((buf.buffer[0]<<24)&0xff000000)|
// ((buf.buffer[1]<<16)&0x00ff0000)|
// ((buf.buffer[2]<< 8)&0x0000ff00)|
// ((buf.buffer[3] )&0x000000ff);
j = Util.ToInt32(buf.buffer, 0);
j = j - 4 - cipher_size + 8;
if (j < 0 || (buf.index + j) > buf.buffer.Length)
{
throw new IOException("invalid data");
}
the value for j ends up being -698566485
because the info coming back isn't what's expected, I suppose...
Tamir.SharpSSH.dll!Tamir.SharpSsh.jsch.Session.read(Tamir.SharpSsh.jsch.Buffer buf = {Tamir.SharpSsh.jsch.Buffer}) Line 793 C#
Tamir.SharpSSH.dll!Tamir.SharpSsh.jsch.UserAuth.start(Tamir.SharpSsh.jsch.Session session = {Tamir.SharpSsh.jsch.Session}) Line 51 + 0xd bytes C#
Tamir.SharpSSH.dll!Tamir.SharpSsh.jsch.UserAuthNone.start(Tamir.SharpSsh.jsch.Session session = {Tamir.SharpSsh.jsch.Session}) Line 45 + 0xb bytes C#
> Tamir.SharpSSH.dll!Tamir.SharpSsh.jsch.Session.connect(int connectTimeout = 8000) Line 339 + 0xb bytes C#
sharpSshTest.exe!sharpSshTest.jsch_samples.AES.RunExample(string[] arg = null) Line 49 + 0xf bytes C#
sharpSshTest.exe!sharpSshTest.sharpSshTest.Main() Line 115 + 0x7 bytes C#
Help!!!