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/**
* This file is part of Hercules.
* http://herc.ws - http://github.com/HerculesWS/Hercules
*
* Copyright (C) 2012-2016 Hercules Dev Team
* Copyright (C) Athena Dev Teams
*
* Hercules 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 3 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define HERCULES_CORE
#include "pincode.h"
#include "char/char.h"
#include "common/cbasetypes.h"
#include "common/conf.h"
#include "common/db.h"
#include "common/mmo.h"
#include "common/nullpo.h"
#include "common/random.h"
#include "common/showmsg.h"
#include "common/socket.h"
#include "common/strlib.h"
#include <stdio.h>
#include <stdlib.h>
struct pincode_interface pincode_s;
struct pincode_interface *pincode;
void pincode_handle (int fd, struct char_session_data* sd) {
struct online_char_data* character;
nullpo_retv(sd);
character = (struct online_char_data*)idb_get(chr->online_char_db, sd->account_id);
if( character && character->pincode_enable > pincode->charselect ){
character->pincode_enable = pincode->charselect * 2;
}else{
pincode->sendstate( fd, sd, PINCODE_OK );
return;
}
if( strlen(sd->pincode) == 4 ){
if( pincode->changetime && time(NULL) > (sd->pincode_change+pincode->changetime) ){ // User hasn't changed his PIN code for a long time
pincode->sendstate( fd, sd, PINCODE_EXPIRED );
} else { // Ask user for his PIN code
pincode->sendstate( fd, sd, PINCODE_ASK );
}
} else // No PIN code has been set yet
pincode->sendstate( fd, sd, PINCODE_NOTSET );
if( character )
character->pincode_enable = -1;
}
void pincode_check(int fd, struct char_session_data* sd) {
char pin[5] = "\0\0\0\0";
nullpo_retv(sd);
safestrncpy(pin, RFIFOP(fd, 6), sizeof(pin));
pincode->decrypt(sd->pincode_seed, pin);
if( pincode->compare( fd, sd, pin ) ){
struct online_char_data* character;
if( (character = (struct online_char_data*)idb_get(chr->online_char_db, sd->account_id)) )
character->pincode_enable = pincode->charselect * 2;
pincode->sendstate( fd, sd, PINCODE_OK );
}
}
int pincode_compare(int fd, struct char_session_data* sd, char* pin) {
nullpo_ret(sd);
nullpo_ret(pin);
if( strcmp( sd->pincode, pin ) == 0 ){
sd->pincode_try = 0;
return 1;
} else {
pincode->sendstate( fd, sd, PINCODE_WRONG );
if( pincode->maxtry && ++sd->pincode_try >= pincode->maxtry ){
pincode->error( sd->account_id );
}
return 0;
}
}
void pincode_change(int fd, struct char_session_data* sd) {
char oldpin[5] = "\0\0\0\0", newpin[5] = "\0\0\0\0";
nullpo_retv(sd);
safestrncpy(oldpin, RFIFOP(fd,6), sizeof(oldpin));
pincode->decrypt(sd->pincode_seed,oldpin);
if( !pincode->compare( fd, sd, oldpin ) )
return;
safestrncpy(newpin, RFIFOP(fd,10), sizeof(newpin));
pincode->decrypt(sd->pincode_seed,newpin);
pincode->update( sd->account_id, newpin );
safestrncpy(sd->pincode, newpin, sizeof(sd->pincode));
pincode->sendstate( fd, sd, PINCODE_ASK );
}
void pincode_setnew(int fd, struct char_session_data* sd) {
char newpin[5] = "\0\0\0\0";
nullpo_retv(sd);
safestrncpy(newpin, RFIFOP(fd,6), sizeof(newpin));
pincode->decrypt(sd->pincode_seed,newpin);
pincode->update( sd->account_id, newpin );
safestrncpy(sd->pincode, newpin, sizeof(sd->pincode));
pincode->sendstate( fd, sd, PINCODE_ASK );
}
// 0 = pin is correct
// 1 = ask for pin - client sends 0x8b8
// 2 = create new pin - client sends 0x8ba
// 3 = pin must be changed - client 0x8be
// 4 = create new pin ?? - client sends 0x8ba
// 5 = client shows msgstr(1896)
// 6 = client shows msgstr(1897) Unable to use your KSSN number
// 7 = char select window shows a button - client sends 0x8c5
// 8 = pincode was incorrect
void pincode_sendstate(int fd, struct char_session_data* sd, uint16 state) {
nullpo_retv(sd);
WFIFOHEAD(fd, 12);
WFIFOW(fd, 0) = 0x8b9;
WFIFOL(fd, 2) = sd->pincode_seed = rnd() % 0xFFFF;
WFIFOL(fd, 6) = sd->account_id;
WFIFOW(fd,10) = state;
WFIFOSET(fd,12);
}
void pincode_notifyLoginPinUpdate(int account_id, char* pin) {
nullpo_retv(pin);
Assert_retv(chr->login_fd != -1);
WFIFOHEAD(chr->login_fd,11);
WFIFOW(chr->login_fd,0) = 0x2738;
WFIFOL(chr->login_fd,2) = account_id;
safestrncpy(WFIFOP(chr->login_fd,6), pin, 5);
WFIFOSET(chr->login_fd,11);
}
void pincode_notifyLoginPinError(int account_id) {
WFIFOHEAD(chr->login_fd,6);
WFIFOW(chr->login_fd,0) = 0x2739;
WFIFOL(chr->login_fd,2) = account_id;
WFIFOSET(chr->login_fd,6);
}
void pincode_decrypt(unsigned int userSeed, char* pin) {
int i;
char tab[10] = {0,1,2,3,4,5,6,7,8,9};
nullpo_retv(pin);
for (i = 1; i < 10; i++) {
int pos;
userSeed = pincode->baseSeed + userSeed * pincode->multiplier;
pos = userSeed % (i + 1);
if( i != pos ){
tab[i] ^= tab[pos];
tab[pos] ^= tab[i];
tab[i] ^= tab[pos];
}
}
for( i = 0; i < 4; i++ ){
pin[i] = tab[pin[i] - '0'];
}
sprintf(pin, "%d%d%d%d", pin[0], pin[1], pin[2], pin[3]);
}
/**
* Reads the 'char_configuration/pincode' config entry and initializes required variables.
*
* @param filename Path to configuration file (used in error and warning messages).
* @param config The current config being parsed.
* @param imported Whether the current config is imported from another file.
*
* @retval false in case of error.
*/
bool pincode_config_read(const char *filename, const struct config_t *config, bool imported)
{
const struct config_setting_t *setting = NULL;
nullpo_retr(false, filename);
nullpo_retr(false, config);
if ((setting = libconfig->lookup(config, "char_configuration/pincode")) == NULL) {
if (imported)
return true;
ShowError("char_config_read: char_configuration/pincode was not found in %s!\n", filename);
return false;
}
if (libconfig->setting_lookup_bool(setting, "enabled", &pincode->enabled) == CONFIG_TRUE) {
#if PACKETVER < 20110309
if (pincode->enabled) {
ShowWarning("pincode_enabled requires PACKETVER 20110309 or higher. disabling...\n");
pincode->enabled = 0;
}
#endif
}
if (libconfig->setting_lookup_int(setting, "change_time", &pincode->changetime) == CONFIG_TRUE)
pincode->changetime *= 60;
if (libconfig->setting_lookup_int(setting, "max_tries", &pincode->maxtry) == CONFIG_TRUE) {
if (pincode->maxtry > 3) {
ShowWarning("pincode_maxtry is too high (%d); Maximum allowed: 3! Capping to 3...\n",pincode->maxtry);
pincode->maxtry = 3;
}
}
if (libconfig->setting_lookup_int(setting, "request", &pincode->charselect) == CONFIG_TRUE) {
if (pincode->charselect != 1 && pincode->charselect != 0) {
ShowWarning("Invalid pincode/request! Defaulting to 0\n");
pincode->charselect = 0;
}
}
return true;
}
void pincode_defaults(void) {
pincode = &pincode_s;
pincode->enabled = PINCODE_OK;
pincode->changetime = 0;
pincode->maxtry = 3;
pincode->charselect = 0;
pincode->multiplier = 0x3498;
pincode->baseSeed = 0x881234;
pincode->handle = pincode_handle;
pincode->decrypt = pincode_decrypt;
pincode->error = pincode_notifyLoginPinError;
pincode->update = pincode_notifyLoginPinUpdate;
pincode->sendstate = pincode_sendstate;
pincode->setnew = pincode_setnew;
pincode->change = pincode_change;
pincode->compare = pincode_compare;
pincode->check = pincode_check;
pincode->config_read = pincode_config_read;
}
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