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/*
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.
*/
/*
Copyright (C) 2005 İsmail Dönmez <ismail@kde.org>
*/
#include "blowfish.h"
#include "mc_blowfish.h"
#include "server.h"
#include "channel.h"
#include <qcstring.h>
#include <qstringlist.h>
namespace Konversation
{
// Find n'th occurrence of separator in input and return the index
int findOccurrence(const QCString& input, const QCString& separator, int nth)
{
int j=1;
uint i;
for(i=0; i < input.length(); ++i)
{
if((input.mid(i,1) == separator))
{
if (j == nth)
return i;
else
++j;
}
}
return i;
}
void decrypt(const QString& recipient, QCString& cipher, Server* server)
{
QCString key = server->getKeyForRecipient(recipient);
if(!key.isEmpty())
{
int index = findOccurrence(cipher, ":", 2);
QCString backup = cipher.mid(0,index+1);
QCString tmp = cipher.mid(index+1);
char* tmp2;
if(server->identifyMsgEnabled()) // Workaround braindead Freenode prefixing messages with +
tmp = tmp.mid(1);
if( !(tmp.mid(0,4) == "+OK ") && !(tmp.mid(0,5) == "mcps ") )
return;
else
cipher = tmp;
if(cipher.mid(0,5) == "mcps ")
cipher = cipher.mid(5);
else
cipher = cipher.mid(4);
QCString ckey( key.length()+2 );
QCString result( cipher.length()+1 );
qstrncpy(result.data(), cipher.data(), cipher.length());
qstrncpy(ckey.data(), key.data(), key.length()+1);
tmp2 = decrypt_string(ckey.data(),result.data());
const char *pfx="(e) ";
// If it's a CTCP we don't want to have the (e) interfering with the processing
if (tmp2[0] == 1)
pfx = "\x0";
cipher = backup+pfx+tmp2+' '+'\n'; // FIXME(??) why is there an added space here?
free(tmp2);
}
}
void decryptTopic(const QString& recipient, QCString& cipher, Server* server)
{
QCString key = server->getKeyForRecipient(recipient);
if(!key.isEmpty())
{
int index = findOccurrence(cipher, ":", 2);
QCString backup = cipher.mid(0,index+1);
QCString tmp = cipher.mid(index+1);
char* tmp2;
if(tmp.mid(0,4) == "+OK ") // FiSH style topic
cipher = tmp.mid(4);
else if(tmp.left(5) == "«m«")
cipher = tmp.mid(5,tmp.length()-10);
else
return;
QCString result( cipher.length()+1 );
QCString ckey( key.length()+2 );
qstrncpy(ckey.data(), key.data(), key.length()+1);
qstrncpy(result.data(), cipher.data(), cipher.length());
tmp2 = decrypt_string(ckey.data(),result.data());
cipher = tmp2;
if(cipher.mid(0,2) == "@@")
cipher = cipher.mid(2);
cipher = backup+"(e) "+cipher;
free(tmp2);
}
}
bool encrypt(const QString& key, QCString& cipher)
{
if(key.isEmpty())
return false;
if (cipher.left(3) == "+p ")
cipher = cipher.mid(3);
else
{
QCString ckey(key.local8Bit());
char *tmp = encrypt_string(ckey.data(), cipher.data());
cipher = QCString("+OK ") + tmp;
free(tmp);
}
return true;
}
}
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