void decodeFile (FileContainer files, char * msgName) {
int currentInt;
char currentChar;
FILE* msgFile = fopen(msgName, "r");
if (files.msgCount == 0 || files.keyCount == 0) {
printMessage(TYPE_ERROR, ERROR_UNKNOWN);
} else {
if (fileExists(decryptedFileName) == 1) {
remove(decryptedFileName);
}
while (!feof(msgFile) && fscanf(msgFile, "%c", ¤tChar) == 1) {
if (currentChar == '[') {
fscanf(msgFile, "%d", ¤tInt);
currentChar = findCharRepresentation(files, currentInt);
writeCharToFile(currentChar, decryptedFileName);
} else if (currentChar != ']') {
writeCharToFile(currentChar, decryptedFileName);
}
}
}
free(files.msg);
free(files.key);
fclose(msgFile);
}
void encodeFile (FileContainer files, char * msgName, int d) {
IndexHolder iHolder;
FILE* msgFile = fopen(msgName, "r");
files.msgCount = getSize(msgName);
files.msg = malloc(files.msgCount * sizeof(int));
if (files.msgCount == 0 || files.keyCount == 0) {
printMessage(TYPE_ERROR, ERROR_UNKNOWN);
exit(0);
} else {
if (fileExists(encryptedFileName) == 1) {
remove(encryptedFileName);
}
iHolder.lastIndex = 30000; // High number so first distance is OK
while (!feof(msgFile) && fscanf(msgFile, "%c", &iHolder.currentChar) == 1) {
iHolder.currentIndex = findIntRepresentation(files, iHolder, d);
if (iHolder.currentIndex != 0) {
writeIntToFile(iHolder.currentIndex, encryptedFileName);
} else {
writeCharToFile(iHolder.currentChar, encryptedFileName);
}
iHolder.lastIndex = iHolder.currentIndex;
}
}
free(files.msg);
free(files.key);
fclose(msgFile);
}
/**
* @brief Deactivates the rules of the firewall, by writing '0' to the rules 'active' attribute.
*
* @return TRUE for success, FALSE for failure.
*/
Bool deactivate(void)
{
return writeCharToFile(RULES_ACTIVE_ATTR_PATH, '0');
}
/**
* @brief Clears the log by writing a single character to the log 'clear' attribute file.
*
* @return TRUE for success, FALSE for failure.
*/
Bool clearLog(void)
{
return writeCharToFile(LOG_CLEAR_ATTR_PATH, 'a');
}