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/******************************************************************************
*
* cipherfil - SWFilter descendant to decipher a module
*
* Copyright 2009 CrossWire Bible Society (http://www.crosswire.org)
* CrossWire Bible Society
* P. O. Box 2528
* Tempe, AZ 85280-2528
*
* 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 version 2.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
*/
#include <stdlib.h>
#include <cipherfil.h>
#include <swcipher.h>
#include <swbuf.h>
SWORD_NAMESPACE_START
CipherFilter::CipherFilter(const char *key) {
cipher = new SWCipher((unsigned char *)key);
}
CipherFilter::~CipherFilter() {
delete cipher;
}
SWCipher *CipherFilter::getCipher() {
return cipher;
}
char CipherFilter::processText(SWBuf &text, const SWKey *key, const SWModule *module) {
if (text.length() > 2) { //check if it's large enough to substract 2 in the next step.
unsigned long len = text.length();
if (!key) { // hack, using key to determine encipher, or decipher
cipher->cipherBuf(&len, text.getRawData()); //set buffer to enciphered text
memcpy(text.getRawData(), cipher->Buf(), len);
// text = cipher->Buf(); //get the deciphered buffer
}
else if ((unsigned long)key == 1) {
cipher->Buf(text.getRawData(), len);
memcpy(text.getRawData(), cipher->cipherBuf(&len), len);
// text = cipher->cipherBuf(&len);
}
}
return 0;
}
SWORD_NAMESPACE_END
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