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|
/* eurephia-template.c -- Main driver for eurephia authentication plugin for OpenVPN
*
*
* // THIS IS A TEMPLATE FOR A DATABASE DRIVER - IT WILL NOT COMPILE //
*
* Go through the code and you will find examples for SQL queries and
* hints how to implement the database specific code
*
* This template is based on the sqlite/eurephia-sqlite.c
*
*
*
* GPLv2 only - Copyright (C) 2008 David Sommerseth <dazo@users.sourceforge.net>
*
* 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
* of the License.
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <dlfcn.h>
#ifndef
#define DRIVER_MODE
#endif
#include <eurephiadb_driver.h>
#include <eurephia_nullsafe.h>
#include <eurephia_log.h>
#include <eurephia_values.h>
#include <eurephiadb_session.h>
#include <passwd.h>
#define DRIVERVERSION "1.0"
#ifndef DRIVERAPIVERSION
# define DRIVERAPIVERSION 1 // Set this value to 2 to support admin utilities
#endif
// Mapping table - mapping attempt types from .... to database table fields
typedef struct {
char *colname;
char *allow_cfg;
char *descr;
} eDBattempt_types_t;
static const eDBattempt_types_t eDBattempt_types[] = {
{NULL, NULL, NULL},
{"remoteip\0", "allow_ipaddr_attempts\0", "IP Address\0"},
{"digest\0", "allow_cert_attempts\0", "Certificate\0"},
{"username\0", "allow_username_attempts\0", "Username\0"},
{NULL, NULL, NULL}
};
/*
* Driver info
*/
const char *eDB_DriverVersion() {
/* WORK TO DO --- UPDATE INFO */
return "eurephiadb-template (v"DRIVERVERSION") David Sommerseth 2008 (C) GPLv2";
}
int eDB_DriverAPIVersion() {
return DRIVERAPIVERSION;
}
/*
* local functions
*/
// Function for simplifying update of openvpn_blacklist
void update_attempts(eurephiaCTX *ctx, const char *blid) {
if( blid != NULL ) {
/* WORK TO DO -- DO SQL:
"UPDATE openvpn_blacklist "
" SET last_accessed = CURRENT_TIMESTAMP WHERE blid = %s", blid
*/
if( /* SQL COMMAND FAILED */ ) {
eurephia_log(ctx, LOG_CRITICAL, 0,
"Could not update openvpn_blacklist.last_accessed for blid=%s", blid);
}
/* FREE SQL RESULT */
}
}
/*
* Public driver functions
*/
// Connect to the database ... connection is stored in the eurephiaCTX context
int eDBconnect(eurephiaCTX *ctx, const int argc, const char **argv)
{
eDBconn *dbc = NULL;
int rc;
/* WORK TO DO -- Parse arguments
*
* use what ever suitable approach to parse arguments sent to the database module.
*
* The arguments being recieved is everything after the '--' (double dash)
* in the 'plugin' configuration line for OpenVPN.
*
* plugin eurephia-auth.so "-i my_db_module.so -L 3 -- myparam1 myparam2 myparam3"
*
* In this example the following parameters will be available here:
*
* argc = 3
* argv[0] = myparam1
* argv[1] = myparam2
* argv[2] = myparam3
*
* You are free to use whatever parameter syntax you would like to use.
*/
DEBUG(ctx, 20, "Function call: eDBconnect(ctx, %i, '...')", argc, dbame);
// Connect to the database
dbc = (eDBconn *) malloc_nullsafe(ctx, sizeof(eDBconn)+2);
if( !dbc ) {
return 0;
}
dbc->dbname = strdup(argv[1]);
eurephia_log(ctx, LOG_INFO, 1, "Opening database '%s'", dbc->dbname);
/* WORK TO DO -- Open a database connection, and save the handle in dbc->handle */
if( /* IF CONNECTION FAILED */ ) {
eurephia_log(ctx, LOG_PANIC, 0, "Could not open database '%s'", dbc->dbname);
free_nullsafe(dbc->dbname);
free_nullsafe(dbc);
return 0;
}
dbc->config = NULL;
ctx->dbc = dbc;
// Load configuration parameters into memory
eurephia_log(ctx, LOG_INFO, 1, "Reading config from database (openvpn_config)");
/* WORK TO DO - DO SQL:
"SELECT datakey, dataval FROM openvpn_config"
*/
if( /* IF WE GOT SOME RECORDS */ ) {
int i = 0;
eurephiaVALUES *cfg = NULL;
cfg = eCreate_value_space(ctx, 11);
if( cfg == NULL ) {
eurephia_log(ctx, LOG_FATAL, 0, "Could not allocate memory for config variables");
/* FREE SQL RESULT */
return 0;
}
for( /* LOOP THROUGH ALL RECORDS, AND ADD THEM TO THE cfg VARIABLE */ ) {
eAdd_value(ctx, cfg,
/* GET datakey FROM SQL RESULT */,
/* GET dataval FROM SQL RESULT */);
}
/* FREE SQL RESULT */
ctx->dbc->config = cfg;
}
return 1;
}
// Disconnect from the database
void eDBdisconnect(eurephiaCTX *ctx)
{
eDBconn *dbc = NULL;
DEBUG(ctx, 20, "Function call: eDBdisconnect(ctx)");
if( ctx->dbc == NULL ) {
eurephia_log(ctx, LOG_WARNING, 0, "Database not open, cannot close database.");
return;
}
dbc = ctx->dbc;
eurephia_log(ctx, LOG_INFO, 1, "Closing database '%s'", dbc->dbname);
/* WORK TO DO: Close database connection using dbc->dbhandle */
free_nullsafe(dbc->dbname);
dbc->dbhandle = NULL;
// Free up config memory
eFree_values(ctx, dbc->config);
free_nullsafe(dbc);
ctx->dbc = NULL;
}
// Authenticate certificate ... returns certid (certificate ID) on success,
// 0 if not found or -1 if certificate is blacklisted
int eDBauth_TLS(eurephiaCTX *ctx, const char *org, const char *cname, const char *email,
const char *digest, const char *depth)
{
int certid = 0;
char *blid = NULL;
DEBUG(ctx, 20, "Function call: eDBauth_TLS(ctx, '%s', '%s', '%s', '%s', %s)",
org, cname, email, digest, depth);
// Check if certificate is valid, and not too many attempts has been tried with the given certificate
/* WORK TO DO -- DO SQL:
"SELECT cert.certid, blid "
" FROM openvpn_certificates cert"
" LEFT JOIN openvpn_blacklist bl USING(digest)"
" WHERE organisation='%q' AND common_name='%q' "
" AND email='%q' AND depth='%q' AND cert.digest='%q'%c",
org, cname, email, depth, digest
*/
if( /* IF WE GOT A RESULT */ ) {
certid = atoi_nullsafe(/* GET cert.certid FROM SQL RESULT */);
blid = atoi_nullsafe(/* GET blid FROM SQL RESULT */);
/* FREE SQL RESULT */
// Check if the certificate is blacklisted or not. blid != NULL when blacklisted
if( blid != NULL ) {
// If the certificate or IP is blacklisted, update status and deny access.
eurephia_log(ctx, LOG_WARNING, 0,
"Attempt with BLACKLISTED certificate (certid %i)", certid);
update_attempts(ctx, blid);
certid = -1;
}
free_nullsafe(blid);
} else {
eurephia_log(ctx, LOG_FATAL, 0, "Could not look up certificate information");
}
DEBUG(ctx, 20, "Result function call: eDBauth_TLS(ctx, '%s', '%s', '%s', '%s', %s) - %i",
org, cname, email, digest, depth, certid);
return certid;
}
// Authenticate user, using username, password and certid as authentication parameters
// returns -1 if authentication fails. Returns 0 if user account is not found.
int eDBauth_user(eurephiaCTX *ctx, const int certid, const char *username, const char *passwd)
{
char *crpwd = NULL, *activated = NULL, *deactivated = NULL, *blid_uname = NULL, *blid_cert;
int uicid = 0, uid = 0, pwdok = 0;
DEBUG(ctx, 20, "Function call: eDBauth_user(ctx, %i, '%s','xxxxxxxx')", certid, username);
// Generate SHA512 hash of password, used for password auth
crpwd = passwdhash(passwd);
/* WORK TO DO -- DO SQL:
"SELECT uicid, ou.uid, activated, deactivated, bl1.blid, bl2.blid, "
" (password = '%s') AS pwdok"
" FROM openvpn_users ou"
" JOIN openvpn_usercerts uc USING(uid) "
" LEFT JOIN openvpn_blacklist bl1 ON( ou.username = bl1.username) "
" LEFT JOIN (SELECT blid, certid "
" FROM openvpn_certificates "
" JOIN openvpn_blacklist USING(digest)) bl2 ON(uc.certid = bl2.certid)"
" WHERE uc.certid = '%i' AND ou.username = '%q'",
crpwd, certid, username
*/
free_nullsafe(crpwd);
if( /* IF NO RESULT WAS RETURNED */ ) {
eurephia_log(ctx, LOG_FATAL, 0,
"Could not look up user in database (certid %i, username '%s'", certid, username);
return 0;
}
if( /* CHECK THAT WE ONLY GOT 1 RECORD*/ ) {
uid = atoi_nullsafe(/* RETRIEVE uid FROM SQL*/);
activated = ;/* GET activated FIELD FROM SQL RESULT */
deactivated = ;/* GET deactivated FIELD FROM SQL RESULT */
blid_uname = ;/* GET bl1.blid FIELD FROM SQL RESULT */
blid_cert = ;/* GET bl2.blid FIELD FROM SQL RESULT */
pwdok = atoi_nullsafe(/* GET pwdok FIELD FROM SQL RESULT */);
if( blid_uname != NULL ) {
eurephia_log(ctx, LOG_WARNING, 0,
"User account is BLACKLISTED (uid: %i, %s)",
uid, username);
uicid = -1;
} else if( blid_cert != NULL ) {
eurephia_log(ctx, LOG_WARNING, 0,
"User account linked with a BLACKLISTED certificate "
"(uid: %i, %s) - certid: %s",
uid, username, certid);
uicid = -1;
} else if( activated == NULL ) {
eurephia_log(ctx, LOG_WARNING, 0,
"User account is not activated (uid: %i, %s)",
uid, username);
uicid = -1;
} else if( deactivated != NULL ) {
eurephia_log(ctx, LOG_WARNING, 0,
"User account is deactivated (uid: %i, %s)",
uid, username);
uicid = -1;
} else if( pwdok != 1 ) {
eurephia_log(ctx, LOG_WARNING, 0,
"Authentication failed for user '%s'. Wrong password.",
username);
uicid = -1;
} else {
uicid = atoi_nullsafe(/*GET uicid FIELD FROM SQL RESULT */);
}
} else {
eurephia_log(ctx, LOG_WARNING, 0, "Authentication failed for user '%s'. "
"Could not find user or user-certificate link.", username);
uicid = 0;
}
/* FREE SQL RESULT */
DEBUG(ctx, 20, "Result function call: eDBauth_user(ctx, %i, '%s','xxxxxxxx') - %i",
certid, username, uicid);
return uicid;
}
// Retrieve the user id from openvpn_usercerts, based on certid and username
int eDBget_uid(eurephiaCTX *ctx, const int certid, const char *username)
{
int ret = 0;
DEBUG(ctx, 20, "Function call: eDBget_uid(ctx, %i, '%s')", certid, username);
/* WORK TO DO -- DO SQL:
"SELECT uid "
" FROM openvpn_usercerts "
" JOIN openvpn_users USING (uid) "
" WHERE certid = '%i' AND username = '%q'",
certid, username
*/
if( /* IF NO RESULT FOUND */ || /* OR WE GOT MORE THAN 1 RECORD */ ) {
eurephia_log(ctx, LOG_FATAL, 0, "Could not lookup userid for user '%s'", username);
ret = -1;
} else {
ret = atoi_nullsafe(/* GET uid FIELD FROM SQL RESULT */);
}
/* FREE SQL RESULT */
return ret;
}
// If function returns true(1) this control marks it as blacklisted
int eDBblacklist_check(eurephiaCTX *ctx, const int type, const char *val)
{
int atpexceed = -1, blacklisted = 0;
char *atpid = NULL, *blid = NULL;
DEBUG(ctx, 20, "Function call: eDBblacklist_check(ctx, '%s', '%s')",
eDBattempt_types[type].descr, val);
/* WORK TO DO -- DO SQL:
"SELECT blid FROM openvpn_blacklist WHERE %s = '%q'",
eDBattempt_types[type].colname, val
*/
if( /* IF RECORDS WAS FOUND */ ) {
blid = strdup_nullsafe(/* GET blid FIELD FROM SQL RESULT */);
/* FREE SQL RESULT */
if( blid != NULL ) { // If we found a blacklisted record
eurephia_log(ctx, LOG_WARNING, 0, "Attempt from blacklisted %s: %s",
eDBattempt_types[type].descr, val);
blacklisted = 1; // [type] is blacklisted
}
// Update attempt information
update_attempts(ctx, blid);
} else {
eurephia_log(ctx, LOG_FATAL, 0, "Querying openvpn_blacklist for blacklisted %s failed",
eDBattempt_types[type].descr);
}
if( blacklisted == 0 ) {
// Check if this [type] has been attempted earlier - if it has reaced the maximum
// attempt limit, blacklist it
/* WORK TO DO -- DO SQL:
"SELECT atpid, attempts >= %q FROM openvpn_attempts WHERE %s = '%q'",
eGet_value(ctx->dbc->config, eDBattempt_types[type].allow_cfg),
eDBattempt_types[type].colname, val
*/
if( /* IF WE FOUND RECORDS */ ) {
atpid = strdup_nullsafe(/* GET atpid FROM SQL RESULT */);
atpexceed = atoi_nullsafe(/* GET "attempts >= %q" FROM SQL RESULT */);
/* FREE SQL RESULT */
// If [type] has reached attempt limit and it is not black listed, black list it
if( (atpexceed > 0) && (blid == NULL) ) {
eurephia_log(ctx, LOG_WARNING, 0,
"%s got BLACKLISTED due to too many failed attempts: %s",
eDBattempt_types[type].descr, val);
/* WORK TO DO -- DO SQL
"INSERT INTO openvpn_blacklist (%s) VALUES ('%q')",
eDBattempt_types[type].colname, val
*/
if( /* IF SQL QUERY FAILED */ ) {
eurephia_log(ctx, LOG_CRITICAL, 0,
"Could not blacklist %s (%s)",
eDBattempt_types[type].descr, val);
}
/* FREE SQL RESULT */
blacklisted = 1; // [type] is blacklisted
}
free_nullsafe(atpid);
} else {
eurephia_log(ctx, LOG_CRITICAL, 0,
"Querying openvpn_attempts for blacklisted %s failed",
eDBattempt_types[type].descr);
}
free_nullsafe(atpr);
}
free_nullsafe(blid);
DEBUG(ctx, 20, "Result - function call: eDBblacklist_check(ctx, '%s', '%s') - %i",
eDBattempt_types[type].descr, val, blacklisted);
return blacklisted;
}
// Register a failed attempt of authentication or IP address has been tried to many times
void eDBregister_attempt(eurephiaCTX *ctx, int type, int mode, const char *value)
{
char *id = NULL, *atmpt_block = NULL, *blid = NULL;
int attempts = 0;
DEBUG(ctx, 20, "Function call: eDBregister_attempt(ctx, %s, %s, '%s')",
eDBattempt_types[type].colname,
(mode == ATTEMPT_RESET ? "ATTEMPT_RESET" : "ATTEMPT_REGISTER"),
value);
//
// openvpn_attempts
//
/* WORK TO DO -- DO SQL
"SELECT atpid, attempts > %s, blid, attempts "
" FROM openvpn_attempts "
" LEFT JOIN openvpn_blacklist USING(%s)"
" WHERE %s = '%q'",
eGet_value(ctx->dbc->config, eDBattempt_types[type].allow_cfg),
eDBattempt_types[type].colname,
eDBattempt_types[type].colname, value
*/
if( /* IF SQL QUERY FAILED */ ) {
eurephia_log(ctx, LOG_FATAL, 0, "Could not look up atpid in openvpn_attempts");
return;
}
attempts = atoi_nullsafe(/* GET attempts FROM SQL RESULT */);
// If we are asked to reset the attempt counter and we do not find any attempts, exit here
if( (mode == ATTEMPT_RESET) && (/* IF NO RECORDS WHERE FOUND OR attempts == 0 */) ) {
/* FREE SQL RESULT */
return;
}
id = strdup_nullsafe(/* GET atpid FROM SQL RESULT */);
atmpt_block = strdup_nullsafe(/* GET "attempts > %s" FROM SQL RESULT */);
blid = strdup_nullsafe(/* GET blid FROM SQL RESULT */);
/* FREE SQL RESULT */
if( (id == NULL) && (mode == ATTEMPT_REGISTER) ) {
// Only insert record when we are in registering mode
/* WORK TO DO -- DO SQL:
"INSERT INTO openvpn_attempts (%s, attempts) VALUES ('%q', 1)",
eDBattempt_types[type].colname, value);
Result check comes later ...
*/
} else if( id != NULL ) {
// if a attempt record exists, update it according to mode
switch( mode ) {
case ATTEMPT_RESET:
/* WORK TO DO -- DO SQL:
"UPDATE openvpn_attempts "
" SET attempts = 0 "
" WHERE atpid = '%q'",
id
Result check comes later ...
*/
break;
default:
/* WORK TO DO -- DO SQL:
"UPDATE openvpn_attempts "
" SET last_attempt = CURRENT_TIMESTAMP, attempts = attempts + 1"
" WHERE atpid = '%q'",
id
Result check comes later ...
*/
break;
}
}
if( /* IF SQL QUERY FAILED */ ) {
eurephia_log(ctx, LOG_CRITICAL, 0,
"Could not update openvpn_attempts for %s = %s",
eDBattempt_types[type].colname, value);
}
/* FREE SQL RESULT */
// If attempts have exceeded attempt limit, blacklist it immediately if not already registered
if( (mode == ATTEMPT_REGISTER)
&& (blid == NULL) && (atmpt_block != NULL) && (atoi_nullsafe(atmpt_block) > 0) ) {
eurephia_log(ctx, LOG_WARNING, 0, "Blacklisting %s due to too many attempts: %s",
eDBattempt_types[type].descr, value);
/* WORK TO DO -- DO SQL:
"INSERT INTO openvpn_blacklist (%s) VALUES ('%q')",
eDBattempt_types[type].colname, value
*/
if( /* IF SQL FAILED */ ) {
eurephia_log(ctx, LOG_CRITICAL, 0,
"Could not blacklist %s: %s",
eDBattempt_types[type].descr, value);
}
/* FREE SQL RESULT */
}
free_nullsafe(id);
free_nullsafe(atmpt_block);
free_nullsafe(blid);
}
// Register a successful authentication
int eDBregister_login(eurephiaCTX *ctx, eurephiaSESSION *skey, const int certid, const int uid,
const char *proto, const char *remipaddr, const char *remport,
const char *vpnipaddr, const char *vpnipmask)
{
DEBUG(ctx, 20, "Function call: eDBregister_login(ctx, '%s', %i, %i, '%s','%s','%s','%s','%s')",
skey->sessionkey, certid, uid, proto, remipaddr, remport, vpnipaddr, vpnipmask);
if( skey->sessionstatus != SESSION_NEW ) {
eurephia_log(ctx, LOG_ERROR, 5, "Not a new session, will not register it again");
return 1;
}
/* WORK TO DO -- DO SQL:
"INSERT INTO openvpn_lastlog (uid, certid, "
" protocol, remotehost, remoteport,"
" vpnipaddr, vpnipmask,"
" sessionstatus, sessionkey, login) "
"VALUES (%i, %i, '%q','%q','%q','%q','%q', 1,'%q', CURRENT_TIMESTAMP)",
uid, certid, proto, remipaddr, remport, vpnipaddr, vpnipmask, skey->sessionkey
*/
if( /* IF SQL QUERY FAILED */ ) {
eurephia_log(ctx, LOG_FATAL, 0, "Could not insert new session into openvpn_lastlog");
return 0;
}
/* FREE SQL RESULT */
skey->sessionstatus = SESSION_REGISTERED;
return 1;
}
// Register the MAC address of the VPN adapter of the user.
int eDBregister_vpnmacaddr(eurephiaCTX *ctx, eurephiaSESSION *session, const char *macaddr)
{
DEBUG(ctx, 20, "Function call: eDBregister_vpnmacaddr(ctx, '%s', '%s')",
session->sessionkey, macaddr);
if( macaddr == NULL ) {
eurephia_log(ctx, LOG_FATAL, 0, "No MAC address was given to save");
return 0;
}
// Register MAC address into history table
/* WORK TO DO -- DO SQL:
"INSERT INTO openvpn_macaddr_history (sessionkey, macaddr) VALUES ('%q','%q')",
session->sessionkey, macaddr
*/
if( /* IF SQL QUERY FAILED */ ) {
eurephia_log(ctx, LOG_FATAL, 0, "Failed to log new MAC address for session");
return 0;
}
/* FREE SQL RESULT */
// Update lastlog to reflect last used MAC address for the session
/* WORK TO DO -- DO SQL:
"UPDATE openvpn_lastlog SET sessionstatus = 2, macaddr = '%q' "
" WHERE sessionkey = '%q' AND sessionstatus = 1", macaddr, session->sessionkey);
*/
if( /* IF SQL QUERY FAILED */ ) {
eurephia_log(ctx, LOG_FATAL, 0, "Could not update lastlog with new MAC address for session");
return 0;
}
/* FREE SQL RESULT */
// Save the MAC address in the session values register - needed for the destroy session
if( eDBset_session_value(ctx, session, "macaddr", macaddr) == 0 ) {
eurephia_log(ctx, LOG_FATAL, 0, "Could not save MAC address into session variables");
return 0;
}
return 1;
}
// Register the user as logged out
int eDBregister_logout(eurephiaCTX *ctx, eurephiaSESSION *skey,
const char *bytes_sent, const char *bytes_received, const char *duration)
{
DEBUG(ctx, 20, "Function call: eDBregister_logout(ctx, '%s', %s, %s)",
skey->sessionkey, bytes_sent, bytes_received);
/* WORK TO DO -- DO SQL:
"UPDATE openvpn_lastlog "
" SET sessionstatus = 3, logout = CURRENT_TIMESTAMP, "
" bytes_sent = '%i', bytes_received = '%i', session_duration = '%i' "
" WHERE sessionkey = '%q' AND sessionstatus = 2",
atoi_nullsafe(bytes_sent), atoi_nullsafe(bytes_received),
atoi_nullsafe(duration), skey->sessionke
*/
if( /* IF SQL QUERY FAILED */ ) {
eurephia_log(ctx, LOG_FATAL, 0,
"Could not update lastlog with logout information (%s)",
skey->sessionkey);
return 0;
}
/* FREE SQL RESULT */
skey->sessionstatus = SESSION_LOGGEDOUT;
return 1;
}
// Retrieve a session key from openvpn_sessionkeys if it is a current session. Session seed is used
// as criteria
char *eDBget_sessionkey_seed(eurephiaCTX *ctx, const char *sessionseed) {
char *skey = NULL;
DEBUG(ctx, 20, "eDBget_sessionkey(ctx, '%s')", sessionseed);
if( sessionseed == NULL ) {
eurephia_log(ctx, LOG_FATAL, 1,
"eDBget_sessionkey: No session seed given - cannot locate sessionkey");
return NULL;
}
/* WORK TO DO -- DO SQL:
"SELECT sessionkey "
" FROM openvpn_sessionkeys "
" JOIN openvpn_lastlog USING (sessionkey)"
" WHERE sessionstatus IN (1,2)"
" AND sessionseed = '%q'",
sessionseed
*/
if( /* IF SQL QUERY FAILED */ ) {
eurephia_log(ctx, LOG_FATAL, 0,
"Could not retrieve sessionkey from openvpn_sessionkeys (%s)",
sessionseed);
return NULL;
}
if( /* CHECK THAT WE ONLY GOT 1 RECORD */ ) {
skey = strdup_nullsafe(/* GET sessionkey FIELD FROM SQL RESULT */);
} else {
skey = NULL;
}
/* FREE SQL RESULT */
return skey;
}
char *eDBget_sessionkey_macaddr(eurephiaCTX *ctx, const char *macaddr) {
char *skey = NULL;
// Find sessionkey from MAC address
/* WORK TO DO -- DO SQL:
"SELECT sessionkey "
" FROM openvpn_sessions "
" JOIN openvpn_lastlog USING (sessionkey)"
" WHERE sessionstatus = 3 "
" AND datakey = 'macaddr' "
" AND dataval = '%q'",
macaddr
*/
if( /* IF SQL QUERY FAILED */ ) {
eurephia_log(ctx, LOG_FATAL, 0,
"Could not remove session from database (MAC addr: %s)", macaddr);
return 0;
}
skey = strdup_nullsafe(/* GET sessionkey FROM SQL RESULT */);
/* FREE SQL RESULT */
return skey;
}
// Function returns true(1) if session key is unique
int eDBcheck_sessionkey_uniqueness(eurephiaCTX *ctx, const char *seskey) {
int uniq = 0;
DEBUG(ctx, 20, "eDBcheck_sessionkey_uniqueness(ctx, '%s')", seskey);
if( seskey == NULL ) {
eurephia_log(ctx, LOG_FATAL, 1,
"eDBcheck_sessionkey_uniqness: Invalid session key given");
return 0;
}
/* WORK TO DO -- DO SQL:
"SELECT count(sessionkey) = 0 FROM openvpn_lastlog WHERE sessionkey = '%q'",
seskey
*/
if( /* IF SQL QUERY FAILED */ ) {
eurephia_log(ctx, LOG_FATAL, 0,
"eDBcheck_sessionkey_uniqness: Could not check uniqueness of sessionkey");
return 0;
}
uniq = atoi_nullsafe(/* GET "count(sessionkey) == 0" (as integer bool - 1 == true) FROM SQL RESULT */);
/* FREE SQL RESULT */
return uniq;
}
// register a link between a short-term session seed and a long-term session key
int eDBregister_sessionkey(eurephiaCTX *ctx, const char *seed, const char *seskey) {
DEBUG(ctx, 20, "eDBregister_sessionkey(ctx, '%s', '%s')", seed, seskey);
if( (seed == NULL) || (seskey == NULL) ) {
eurephia_log(ctx, LOG_FATAL, 1,
"eDBregister_sessionkey: Invalid session seed or session key given");
return 0;
}
/* WORK TO DO -- DO SQL:
"INSERT INTO openvpn_sessionkeys (sessionseed, sessionkey) VALUES('%q','%q')",
seed, seskey
*/
if( /* IF SQL QUERY FAILED */ ) {
eurephia_log(ctx, LOG_FATAL, 0,
"eDBregister_sessionkey: Error registering sessionkey into openvpn_sessionkeys");
return 0;
}
/* FREE SQL RESULT */
return 1;
}
// remove a session seed/session key link from openvpn_sessionkeys
int eDBremove_sessionkey(eurephiaCTX *ctx, const char *seskey) {
DEBUG(ctx, 20, "eDBremove_sessionkey(ctx, '%s')", seskey);
if( seskey == NULL ) {
eurephia_log(ctx, LOG_FATAL, 1,
"eDBremove_sessionkey: Invalid session key given");
return 0;
}
/* WORK TO DO -- DO SQL:
"DELETE FROM openvpn_sessionkeys WHERE sessionkey = '%q'",
seskey
*/
if( /* IF SQL QUERY FAILED */ ) {
eurephia_log(ctx, LOG_FATAL, 0,
"eDBremove_sessionkey: Error removing sessionkey from openvpn_sessionkeys");
return 0;
}
/* FREE SQL RESULT */
return 1;
}
// Load session values stored in the database into a eurephiaVALUES struct (session values)
eurephiaVALUES *eDBload_sessiondata(eurephiaCTX *ctx, const char *sesskey) {
eurephiaVALUES *sessvals = NULL;
int i;
if( (ctx == NULL) || (sesskey == NULL) ) {
return NULL;
}
DEBUG(ctx, 20, "Function call: eDBload_sessiondata(ctx, '%s')", sesskey);
sessvals = eCreate_value_space(ctx, 10);
/* WORK TO DO -- DO SQL:
"SELECT datakey, dataval FROM openvpn_sessions WHERE sessionkey = '%q'",
sesskey
*/
if( /* IF WE GOT RECORDS IN THE QUERY */ ) {
for( /* LOOP THROUGH ALL RECORDS */ ) {
eAdd_value(ctx, sessvals,
/* GET datakey FROM SQL RESULT */,
/* GET dataval FROM SQL RESULT */);
}
/* FREE SQL RESULT */
} else {
eurephia_log(ctx, LOG_CRITICAL, 0,
"Could not load session values for session '%s'", sesskey);
}
return sessvals;
}
// Store a new, update or delete a sessionvalue in the database
int eDBstore_session_value(eurephiaCTX *ctx, eurephiaSESSION *session, int mode, const char *key, const char *val)
{
if( session == NULL ) {
DEBUG(ctx, 20,
"Function call failed to eDBstore_session_value(ctx, ...): Non-existing session key");
return 0;
}
DEBUG(ctx, 20, "Function call: eDBstore_session_value(ctx, '%s', %i, '%s', '%s')",
session->sessionkey, mode, key, val);
switch( mode ) {
case SESSVAL_NEW:
/* WORK TO DO -- DO SQL:
"INSERT INTO openvpn_sessions (sessionkey, datakey, dataval) "
"VALUES ('%q','%q','%q')",
session->sessionkey, key, val
*/
if( /* IF SQL QUERY FAILED */ ) {
eurephia_log(ctx, LOG_FATAL, 0,
"Could not register new session variable into database: [%s] %s = %s",
session->sessionkey, key, val);
return 0;
}
break;
case SESSVAL_UPDATE:
/* WORK TO DO -- DO SQL:
"UPDATE openvpn_sessions SET dataval = '%q' "
" WHERE sessionkey = '%q' AND datakey = '%q'",
val, session->sessionkey, key
*/
if( /* IF SQL QUERY FAILED */ ) {
eurephia_log(ctx, LOG_FATAL, 0,
"Could not update session variable: [%s] %s = %s ",
session->sessionkey, key, val);
return 0;
}
break;
case SESSVAL_DELETE:
/* WORK TO DO -- DO SQL:
"DELETE FROM openvpn_sessions WHERE sessionkey = '%q' AND datakey = '%q'",
session->sessionkey, key
*/
if( /* IF SQL QUERY FAILED */ ) {
eurephia_log(ctx, LOG_FATAL, 0,
"Could not delete session variable: [%s] %s",
session->sessionkey, key);
return 0;
}
break;
default:
eurephia_log(ctx, LOG_FATAL, 0,
"Unknown eDBstore_session_value mode '%i'", mode);
return 0;
}
/* FREE SQL RESULT */
return 1;
}
// Delete session information from openvpn_sessions and update openvpn_lastlog with status
int eDBdestroy_session(eurephiaCTX *ctx, eurephiaSESSION *session) {
DEBUG(ctx, 20, "Function call: eDBdestroy_session(ctx, '%s')", session->sessionkey);
if( (session == NULL) || (session->sessionkey == NULL) ) {
eurephia_log(ctx, LOG_WARNING, 1, "No active session given to be destroyed");
return 1;
}
// Update session status
/* WORK TO DO -- SQL
"UPDATE openvpn_lastlog "
" SET sessionstatus = 4, session_deleted = CURRENT_TIMESTAMP "
" WHERE sessionkey = '%q' AND sessionstatus = 3",
session->sessionkey
*/
if( /* IF SQL QUERY FAILED */ ) {
eurephia_log(ctx, LOG_FATAL, 0,
"Could not update session status in lastlog (%s))", session->sessionkey);
return 0;
}
/* FREE SQL RESULT */
// Delete session variables
/* WORK TO DO -- DO SQL:
"DELETE FROM openvpn_sessions WHERE sessionkey = '%q'",
session->sessionkey
*/
if( /* IF SQL QUERY FAILED */ ) {
eurephia_log(ctx, LOG_FATAL, 0,
"Could not delete session variables (%s))", session->sessionkey);
return 0;
}
/* FREE SQL RESULT */
// Remove the sessionkey from openvpn_sessions
if( eDBremove_sessionkey(ctx, session->sessionkey) == 0 ) {
return 0;
}
return 1;
}
char *eDBget_firewall_profile(eurephiaCTX *ctx, eurephiaSESSION *session)
{
char *ret = NULL;
DEBUG(ctx, 20, "Function call: eDBget_firewall_profile(ctx, {session}'%s')",
session->sessionkey);
/* WORK TO DO -- DO SQL:
"SELECT fw_profile "
" FROM openvpn_lastlog "
" JOIN openvpn_usercerts USING(certid, uid)"
" JOIN openvpn_accesses USING(accessprofile)"
" WHERE sessionkey = '%q'",
session->sessionkey
*/
if( /* IF SQL QUERY FAILED */ ) {
eurephia_log(ctx, LOG_FATAL, 0,
"Could not retrieve firewall profile for session '%s'",
session->sessionkey);
return NULL;
}
ret = strdup_nullsafe(/* GET fw_profile FROM SQL RESULT */);
/* FREE SQL RESULT */
return ret;
}
eurephiaVALUES *eDBget_blacklisted_ip(eurephiaCTX *ctx) {
eurephiaVALUES *ret = NULL;
DEBUG(ctx, 20, "Function call: eDBget_blacklisted_ip(ctx)");
/* WORK TO DO -- DO SQL:
SELECT remoteip FROM openvpn_blacklist WHERE remoteip IS NOT NULL
*/
if( /* IF SQL QUERY FAILED */ ) {
eurephia_log(ctx, LOG_FATAL, 0,
"Could not retrieve blacklisted IP addresses from the database");
return NULL;
}
ret = eCreate_value_space(ctx, 21);
for( /* LOOP THROUGH ALL RECORDS */ ) {
eAdd_value(ctx, ret, NULL, /* GET remoteip FROM SQL RESULT */);
}
/* FREE SQL RESULT */
return ret;
}
#if DRIVERAPIVERSION > 1
/*
* API Version 2 functions
*
*/
#endif
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