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/*
* This file is part of the KFTPGrabber project
*
* Copyright (C) 2004 by the KFTPGrabber developers
* Copyright (C) 2004 Jernej Kos <kostko@jweb-network.net>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* is provided AS IS, WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, and
* NON-INFRINGEMENT. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Steet, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
#include "desencryptor.h"
#include <kmdcodec.h>
#include <tqfile.h>
#include <stdlib.h>
namespace KFTPGrabberBase {
DESEncryptor::DESEncryptor()
{
}
void DESEncryptor::DESExec(const TQString &str, int mode)
{
TQCString string(str.ascii());
m_output = "";
TQByteArray in;
TQByteArray out;
if (mode == DES_DECRYPT) {
// Base64 decode the output
KCodecs::base64Decode(string, in);
} else {
in.resize(string.size());
memcpy(in.data(), string.data(), in.size());
}
// Read sizeof(DES_cblock) chars at a time and encrypt/decrypt them
unsigned int i = 0;
DES_cblock *o_message = (DES_cblock*) malloc(sizeof(DES_cblock));
DES_cblock *o_output = (DES_cblock*) malloc(sizeof(DES_cblock));
memset(o_message, 0, sizeof(DES_cblock));
memset(o_output, 0, sizeof(DES_cblock));
//out.resize(in.size() * 2);
while (i < in.size()) {
out.resize(out.size() + sizeof(DES_cblock));
memcpy(o_message, in.data() + i, sizeof(DES_cblock));
DES_ecb_encrypt(o_message, o_output, &m_schedule, mode);
memcpy(out.data() + i, o_output, sizeof(DES_cblock));
// Next sizeof(DES_cblock) bytes
i += sizeof(DES_cblock);
// Clear everything
memset(o_message, 0, sizeof(DES_cblock));
memset(o_output, 0, sizeof(DES_cblock));
}
free(o_message);
free(o_output);
if (mode == DES_ENCRYPT) {
// Base64 encode the output
m_output = KCodecs::base64Encode(out).data();
} else {
m_output = TQCString(out).data();
}
}
void DESEncryptor::setKey(const TQString &key)
{
// Setup our DES key
DES_string_to_key(key.ascii(), &m_key);
DES_set_key_checked(&m_key, &m_schedule);
}
void DESEncryptor::encrypt(const TQString &string)
{
DESExec(string, DES_ENCRYPT);
}
void DESEncryptor::decrypt(const TQString &string)
{
DESExec(string, DES_DECRYPT);
}
TQString DESEncryptor::output()
{
return m_output;
}
}
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