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