/* administration.c  --  Functions needed for administration tasks
 *
 *  GPLv2 - 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 <assert.h>

#include <libxml/parser.h>
#include <libxml/tree.h>

#ifndef DRIVERAPIVERSION
# define DRIVERAPIVERSION 2
#endif

#include <sqlite3.h>

#include <eurephia_nullsafe.h>
#include <eurephia_context.h>
#include <eurephia_admin_struct.h>
#include <eurephia_log.h>
#include <eurephia_xml.h>
#include <eurephia_values.h>
#include <eurephiadb_session_struct.h>
#include <eurephiadb_mapping.h>
#include <passwd.h>

#ifndef DRIVER_MODE
#define DRIVER_MODE
#endif
#include <eurephiadb_driver.h>

#include "sqlite.h"
#include "fieldmapping.h"

#if DRIVERAPIVERSION > 1
/*
 *  API Version 2 functions
 *
 */

// Authenticate admin user against user database
int eDBadminAuth(eurephiaCTX *ctx, const char *req_access, const char *uname, const char *pwd) {
        dbresult *res = NULL;
        char *crpwd = NULL;
        char *activated = NULL, *deactivated = NULL, *blid = NULL;
        int uid = -1, pwok = 0, access = 0;
        char interface;

        assert(ctx != NULL);

        switch( ctx->context_type ) {
        case ECTX_ADMIN_CONSOLE:
                interface = 'C';
                break;
        case ECTX_ADMIN_WEB:
                interface = 'W';
                break;
        default:
                eurephia_log(ctx, LOG_ERROR, 0, "Wrong eurephia context type (0x%04x)", ctx->context_type);
                return 0;
        }

        if( (strlen_nullsafe(uname) < 4) || (strlen_nullsafe(pwd) < 4) ) {
                eurephia_log(ctx, LOG_WARNING, 0, "User name and/or password is either null or less than 4 bytes");
                return 0;
        }

        //
        // Authenticate user and password
        //
        crpwd = passwdhash(pwd);
        assert(crpwd != NULL);
        res = sqlite_query(ctx,
                           "SELECT activated, deactivated, bl.blid, "
                           "       (password = '%q') AS pwok, uid "
                           "  FROM openvpn_users ou"
                           "  LEFT JOIN openvpn_blacklist bl USING (username)"
                           " WHERE ou.username = '%q'",
                           crpwd, uname);
        memset(crpwd, 0, strlen_nullsafe(crpwd));
        free_nullsafe(crpwd);

        if( res == NULL ) {
                eurephia_log(ctx, LOG_FATAL, 0, "Could not authenticate user against the database");
                return 0;
        }

        if( sqlite_get_numtuples(res) == 1 ) {
                activated   = sqlite_get_value(res, 0, 0);
                deactivated = sqlite_get_value(res, 0, 1);
                blid        = sqlite_get_value(res, 0, 2);
                pwok        = atoi_nullsafe(sqlite_get_value(res, 0, 3));
                uid         = atoi_nullsafe(sqlite_get_value(res, 0, 4));
                sqlite_free_results(res);

                if( blid != NULL ) {
                        eurephia_log(ctx, LOG_WARNING, 0,
                                     "Your user account is BLACKLISTED.  You have no access.");
                        sqlite_free_results(res);
                        return 0;
                }

                if( activated == NULL ) {
                        eurephia_log(ctx, LOG_WARNING, 0, "Your user account is not yet activated.");
                        sqlite_free_results(res);
                        return 0;
                }

                if( deactivated != NULL ) {
                        eurephia_log(ctx, LOG_WARNING, 0, "Your user account is deactivated.");
                        sqlite_free_results(res);
                        return 0;
                }

                if( pwok != 1 ) {
                        eurephia_log(ctx, LOG_WARNING, 0, "Authentication failed,");
                        sqlite_free_results(res);
                        return 0;
                }

                // Check if access level is granted
                // (SQLite do not handle advanced joins so well, so we need to
                //  do this check with an extra query)
                res = sqlite_query(ctx,
                                   "SELECT (count(*) = 1) AS access "
                                   "  FROM eurephia_adminaccess"
                                   " WHERE uid = '%i' AND interface = '%c' AND access = '%q'",
                                   uid, interface, req_access);
                if( res == NULL ) {
                        eurephia_log(ctx, LOG_FATAL, 0, "Could not check access level");
                        return 0;
                }
                access = atoi_nullsafe(sqlite_get_value(res, 0, 0));
                sqlite_free_results(res);

                if( access == 0 ) {
                        eurephia_log(ctx, LOG_WARNING, 0, "Your account is lacking privileges for this operation");
                        return 0;
                }
        } else {
                eurephia_log(ctx, LOG_WARNING, 0, "Authentication failed. No unique records found.");
                sqlite_free_results(res);
                return 0;
        }

        // If we reach this place, authentication was successful.  Return users uid
        return uid;
}

int eDBadminValidateSession(eurephiaCTX *ctx, const char *sesskey, const char *req_access) {
        dbresult *res = NULL;
        int valid = 0, access = 0, expire_time = 0;
        char interface;

        assert( (ctx != NULL) && (sesskey != NULL) );

        switch( ctx->context_type ) {
        case ECTX_ADMIN_CONSOLE:
                interface = 'C';
                break;
        case ECTX_ADMIN_WEB:
                interface = 'W';
                break;
        default:
                eurephia_log(ctx, LOG_ERROR, 0, "Wrong eurephia context type (0x%04x)", ctx->context_type);
                return 0;
        }

        // Check if the session is still valid (not expired) and that this session are allowed to access
        // the requested access level.
        expire_time = (60 * atoi_nullsafe(defaultValue(eGet_value(ctx->dbc->config, "eurephiadmin_autologout"),
                                                       "10")
                                          )
                       );
        res = sqlite_query(ctx,
                           "SELECT (strftime('%%s',CURRENT_TIMESTAMP)-strftime('%%s',last_action)) > %i AS exp,"
                           "       (access IS NOT NULL) AS access"
                           "  FROM eurephia_adminlog"
                           "  LEFT JOIN eurephia_adminaccess USING(uid,interface)"
                           " WHERE status IN (1,2)"
                           "       AND sessionkey = '%q'"
                           "       AND access = '%q'",
                           expire_time, sesskey, req_access);

        if( (res == NULL) ) {
                eurephia_log(ctx, LOG_FATAL, 0, "Could not validate session");
                return 0;
        }

        valid  = (atoi_nullsafe(sqlite_get_value(res, 0, 0)) == 0);
        access = (atoi_nullsafe(sqlite_get_value(res, 0, 1)) == 1);
        sqlite_free_results(res);

        // If still valid, update last_action
        if( valid && access ) {
                res = sqlite_query(ctx,
                                   "UPDATE eurephia_adminlog"
                                   "   SET last_action = CURRENT_TIMESTAMP, status = 2"
                                   " WHERE sessionkey = '%q'", sesskey);
                if( res == NULL ) {
                        eurephia_log(ctx, LOG_ERROR, 0, "Could not register session activity");
                }
                sqlite_free_results(res);

        } else {
                // If not valid, register session as auto-logged out

                res = sqlite_query(ctx,
                                   "UPDATE eurephia_adminlog"
                                   "   SET logout = CURRENT_TIMESTAMP, status = %i"
                                   " WHERE sessionkey = '%q'",
                                   (access ? 4 : 5), sesskey);
                if( res == NULL ) {
                        eurephia_log(ctx, LOG_ERROR, 0, "Could not register old session as logged out");
                }
                sqlite_free_results(res);

                // Delete session variables
                res = sqlite_query(ctx, "DELETE FROM openvpn_sessions WHERE sessionkey = '%q'",
                                   sesskey);
                if( res == NULL ) {
                        eurephia_log(ctx, LOG_ERROR, 0,
                                     "Could not delete session variables (%s))", sesskey);
                        return 0;
                }
                sqlite_free_results(res);

                if( !access ) {
                        eurephia_log(ctx, LOG_WARNING, 0, "Your user account is lacking privileges");
                }

        }
        return (valid && access);
}

int eDBadminRegisterLogin(eurephiaCTX *ctx, eurephiaSESSION *session) {
        dbresult *res = NULL;
        char interface;
        int uid;

        assert((ctx != NULL) && (session != NULL));

        switch( ctx->context_type ) {
        case ECTX_ADMIN_CONSOLE:
                interface = 'C'; break;
        case ECTX_ADMIN_WEB:
                interface = 'W'; break;
        default:
                eurephia_log(ctx, LOG_ERROR, 0, "Wrong eurephia context type (0x%04x)", ctx->context_type);
                return 0;
        }

        // Register login into eurephia_adminlog ... uid, login, interface, sessionkey
        uid = atoi_nullsafe(eGet_value(session->sessvals, "uid"));
        res = sqlite_query(ctx,
                           "INSERT INTO eurephia_adminlog "
                           "       (uid, interface, status, login, last_action, sessionkey) "
                           "VALUES ('%i','%c',1,CURRENT_TIMESTAMP, CURRENT_TIMESTAMP, '%q')",
                           uid, interface, session->sessionkey);
        if( !res ) {
                eurephia_log(ctx, LOG_FATAL, 0, "Could not manage to register the session in the database");
                return 0;
        }
        sqlite_free_results(res);
        return 1;
}

int eDBadminLogout(eurephiaCTX *ctx, const char *sessionkey) {
        dbresult *res = NULL;

        assert((ctx != NULL) && (sessionkey != NULL));

        // Update session as logged out
        res = sqlite_query(ctx,
                           "UPDATE eurephia_adminlog "
                           "   SET logout = CURRENT_TIMESTAMP, status = 3"
                           " WHERE sessionkey = '%q'",
                           sessionkey);
        if( !res ) {
                eurephia_log(ctx, LOG_FATAL, 0, "Could not manage to register the session as logged out");
                return 0;
        }
        sqlite_free_results(res);

        // Delete session variables
        res = sqlite_query(ctx, "DELETE FROM openvpn_sessions WHERE sessionkey = '%q'", sessionkey);
        if( res == NULL ) {
                eurephia_log(ctx, LOG_ERROR, 0,
                             "Could not delete session variables (%s))", sessionkey);
                return 0;
        }
        sqlite_free_results(res);

        return 1;
}

int eDBadminConfigSet(eurephiaCTX *ctx, const char *key, const char *val) {
        dbresult *res = NULL;
        int found = 0;

        assert((ctx != NULL) && (ctx->dbc != NULL));

        res = sqlite_query(ctx, "SELECT count(*) FROM openvpn_config WHERE datakey = '%q'", key);
        if( !res ) {
                eurephia_log(ctx, LOG_ERROR, 0, "Could not query configuration table");
                return 0;
        }
        found = atoi_nullsafe(sqlite_get_value(res, 0, 0));
        sqlite_free_results(res);

        if( found == 0 ) {
                res = sqlite_query(ctx,
                                   "INSERT INTO openvpn_config (datakey, dataval) VALUES ('%q','%q')",
                                   key, val);
        } else {
                res = sqlite_query(ctx, "UPDATE openvpn_config SET dataval = '%q' WHERE datakey = '%q'",
                                   val, key);
        }

        if( res == NULL ) {
                eurephia_log(ctx, LOG_ERROR, 0, "Could not register configuration entry (%s = '%s'", key, val);
                return 0;
        }
        sqlite_free_results(res);
        eAdd_value(ctx, ctx->dbc->config, key, val);
        return 1;
}

int eDBadminConfigDelete(eurephiaCTX *ctx, const char *key) {
        dbresult *res = NULL;

        assert((ctx != NULL) && (ctx->dbc != NULL));

        res = sqlite_query(ctx, "DELETE FROM openvpn_config WHERE datakey = '%q'", key);
        if( !res ) {
                eurephia_log(ctx, LOG_ERROR, 0, "Could delete config configuration entry (%s)", key);
                return 0;
        }
        sqlite_free_results(res);
        return 1;
}

xmlDoc *eDBadminGetUserList(eurephiaCTX *ctx, const char *sortkeys) {
        xmlDoc *userlist = NULL;
        xmlNode *root_n = NULL, *user_n = NULL;
        dbresult *res = NULL;
        char *dbsort = NULL, tmp[34];
        int i = 0;

        assert((ctx != NULL) && (ctx->dbc != 0));

        // Convert the input sort keys to the proper database field names
        dbsort = eDBmkSortKeyString(tbl_sqlite_users, sortkeys);

        // Query database for all users
        res = sqlite_query(ctx,
                           "SELECT username, activated, deactivated, last_accessed, uid"
                           "  FROM openvpn_users "
                           "ORDER BY %s", (sortkeys != NULL ? dbsort : "uid"));
        if( res == NULL ) {
                eurephia_log(ctx, LOG_ERROR, 0, "Error querying the user database");
                return NULL;
        }

        // Prepare a list with all users
        memset(&tmp, 0, 34);
        eurephiaXML_CreateDoc(ctx, 1, "userlist", &userlist, &root_n);
        snprintf(tmp, 32, "%i", sqlite_get_numtuples(res));
        xmlNewProp(root_n, (xmlChar *)"usercount", (xmlChar *)tmp);

        // Register all records
        for( i = 0; i < sqlite_get_numtuples(res); i++ ) {
                user_n = xmlNewChild(root_n, NULL, (xmlChar *)"user", NULL);
                sqlite_xml_value(user_n, XML_ATTR, "uid",           res, i, 4);
                sqlite_xml_value(user_n, XML_NODE, "username",      res, i, 0);
                sqlite_xml_value(user_n, XML_NODE, "activated",     res, i, 1);
                sqlite_xml_value(user_n, XML_NODE, "deactivated",   res, i, 2);
                sqlite_xml_value(user_n, XML_NODE, "last_accessed", res, i, 3);
        }
        sqlite_free_results(res);

        // Return a user list
        return userlist;
}

inline int xml_set_flag(xmlNode *node, char *flagname, int flagged) {
        if( flagged ) {
                xmlNewChild(node, NULL, (xmlChar *) "flag", (xmlChar *) flagname);
        }
        return flagged;
}


// This function will search up a user, based on information given in a fieldMapping structure.
// It will return an XML document containing the user information requested, controlled by the
// getInfo flag. These flags are defined in eurephiadb_driver.h
//
// The search XML document format is:
//    <eurephia format="1">
//        <fieldMapping table="users">
//           <{search field}>{search value}</{search field}>
//        </fieldMapping>
//    </eurehpia>
//
//  It can be several search field tags to limit the search even more.
//
xmlDoc *eDBadminGetUserInfo(eurephiaCTX *ctx, int getInfo, xmlDoc *srch) {
        dbresult *uinf = NULL, *qres = NULL;
        eDBfieldMap *uinfo_map = NULL;
        int flag = 0, uid = 0;
        char *username = NULL;

        xmlDoc *doc = NULL;
        xmlNode *root_n = NULL, *info_n = NULL, *fieldmap = NULL;

        fieldmap = eurephiaXML_getRoot(ctx, srch, "fieldMapping", 1);
        uinfo_map = eDBxmlMapping(ctx, tbl_sqlite_users, "u", fieldmap);

        // Query the database, find the user defined in the user map
        uinf = sqlite_query_mapped(ctx, SQL_SELECT,
                                   "SELECT u.username, u.activated, u.deactivated, u.last_accessed, u.uid,"
                                   "       (bl.username IS NOT NULL), opensess, logincount,"
                                   "       (at.attempts > 0)"
                                   "  FROM openvpn_users u"
                                   "  LEFT JOIN openvpn_blacklist bl USING(username)"
                                   "  LEFT JOIN openvpn_attempts at ON(at.username = u.username)"
                                   "  LEFT JOIN (SELECT uid, count(*) AS logincount "
                                   "               FROM openvpn_lastlog"
                                   "              GROUP BY uid) lc"
                                   "         ON (lc.uid = u.uid)"
                                   "  LEFT JOIN (SELECT uid, count(*) > 0 AS opensess"
                                   "               FROM openvpn_lastlog"
                                   "              WHERE sessionstatus = 2"
                                   "              GROUP BY uid) os"
                                   "         ON (os.uid = u.uid)",
                                   NULL, uinfo_map);

        if( uinf == NULL ) {
                eurephia_log(ctx, LOG_ERROR, 0, "Error querying the database for a user");
                return 0;
        }
        eDBfreeMapping(uinfo_map);

        switch( sqlite_get_numtuples(uinf) ) {
        case 0:
                sqlite_free_results(uinf);
                return 0; // No user found

        case 1:
                uid = atoi_nullsafe(sqlite_get_value(uinf, 0, 4));
                username = sqlite_get_value(uinf, 0, 0);

                eurephiaXML_CreateDoc(ctx, 1, "user", &doc, &root_n);
                sqlite_xml_value(root_n, XML_NODE, "username", uinf, 0, 0);
                sqlite_xml_value(root_n, XML_ATTR, "uid", uinf, 0, 4);

                if( (getInfo & USERINFO_user) == USERINFO_user ) {
                        info_n = xmlNewChild(root_n, NULL, (xmlChar *) "flags", NULL);

                        // set DEACTIVATED flag, if deactivated field is not NULL
                        xml_set_flag(info_n, "DEACTIVATED", (sqlite_get_value(uinf, 0, 2) != NULL));

                        // set BLACKLISTED flag, if username is found in blacklist table
                        xml_set_flag(info_n, "BLACKLISTED", (atoi_nullsafe(sqlite_get_value(uinf, 0, 5))==1));

                        // set OPENSESSION flag, if user has a lastlog entry with sessionstatus == 2
                        xml_set_flag(info_n, "OPENSESSION", (atoi_nullsafe(sqlite_get_value(uinf, 0, 6))==1));

                        // set ERRATTEMPT flag, if user has an entry in attempts log with attemtps > 0
                        xml_set_flag(info_n, "ERRATTEMPT", (atoi_nullsafe(sqlite_get_value(uinf, 0, 8))==1));

                        // set NEVERUSED flag, if login count == 0 and last_accessed == NULL
                        flag = xml_set_flag(info_n, "NEVERUSED", ((atoi_nullsafe(sqlite_get_value(uinf,0, 7))==0)
                                                                  && (sqlite_get_value(uinf, 0, 3) == NULL)));

                        // set RSETLASTUSED flag, if login count == 0 and last_accessed == NULL
                        xml_set_flag(info_n, "RSETLASTUSED", !flag && (sqlite_get_value(uinf,0,3)) == NULL);

                        // set RSETLOGINCNT flag, if login count == 0 and last_accessed != NULL
                        xml_set_flag(info_n, "RSETLOGINCNT", ((atoi_nullsafe(sqlite_get_value(uinf,0, 7))==0)
                                                              && (sqlite_get_value(uinf,0,3)) != NULL));

                        sqlite_xml_value(root_n, XML_NODE, "activated", uinf, 0, 1);
                        sqlite_xml_value(root_n, XML_NODE, "deactivated", uinf, 0, 2);
                        info_n = sqlite_xml_value(root_n, XML_NODE, "last_accessed", uinf, 0, 3);
                        sqlite_xml_value(info_n, XML_ATTR, "logincount", uinf, 0, 7);
                }

                if( (getInfo & USERINFO_certs) == USERINFO_certs ) {
                        // Extract certificate info
                        qres = sqlite_query(ctx,
                                            "SELECT depth, digest, common_name, organisation, email, "
                                            "       c.registered, c.certid,  uc.accessprofile, access_descr,"
                                            "       fw_profile"
                                            "  FROM openvpn_certificates c"
                                            "  LEFT JOIN openvpn_usercerts uc ON (c.certid = uc.certid)"
                                            "  LEFT JOIN openvpn_accesses a "
                                            "         ON (uc.accessprofile = a.accessprofile)"
                                            " WHERE uid = '%i' ORDER BY c.certid DESC", uid);

                        info_n = xmlNewChild(root_n, NULL, (xmlChar *) "certificates", NULL);
                        if( (qres != NULL) && (sqlite_get_numtuples(qres) > 0) ) {
                                int i;
                                xmlNode *cert, *acpr;

                                for( i = 0; i < sqlite_get_numtuples(qres); i++ ) {
                                        cert = xmlNewChild(info_n, NULL, (xmlChar *) "certificate", NULL);

                                        sqlite_xml_value(cert, XML_ATTR, "certid",        qres, 0, 6);
                                        sqlite_xml_value(cert, XML_ATTR, "depth",         qres, 0, 0);
                                        sqlite_xml_value(cert, XML_ATTR, "registered",    qres, 0, 5);
                                        sqlite_xml_value(cert, XML_NODE, "digest",        qres, 0, 1);
                                        sqlite_xml_value(cert, XML_NODE, "common_name",   qres, 0, 2);
                                        sqlite_xml_value(cert, XML_NODE, "organisation",  qres, 0, 3);
                                        sqlite_xml_value(cert, XML_NODE, "email",         qres, 0, 4);

                                        acpr = sqlite_xml_value(cert, XML_NODE, "access_profile", qres, 0, 8);
                                        sqlite_xml_value(acpr, XML_ATTR, "accessprofile",         qres, 0, 7);
                                        sqlite_xml_value(acpr, XML_ATTR, "fwdestination",         qres, 0, 9);
                                }
                        }

                        if( qres != NULL ) {
                                sqlite_free_results(qres);
                        }
                }

                if( (getInfo & USERINFO_lastlog) == USERINFO_lastlog ) {
                        int i = 0;
                        xmlNode *lastl = NULL, *sess = NULL, *tmp1 = NULL, *tmp2 = NULL;

                        qres = sqlite_query(ctx,
                                            "SELECT llid, ll.certid, protocol, remotehost, remoteport, macaddr,"
                                            "       vpnipaddr, vpnipmask, sessionstatus, sessionkey,"
                                            "       login, logout, session_duration, session_deleted,"
                                            "       bytes_sent, bytes_received, uicid, accessprofile,"
                                            "       access_descr, fw_profile, depth, digest,"
                                            "       common_name, organisation, email"
                                            "  FROM openvpn_lastlog ll"
                                            "  LEFT JOIN openvpn_usercerts USING (uid, certid)"
                                            "  LEFT JOIN openvpn_accesses USING (accessprofile)"
                                            "  LEFT JOIN openvpn_certificates cert ON (ll.certid = cert.certid)"
                                            " WHERE uid = '%i' ORDER BY login, logout", uid);

                        if( qres == NULL ) {
                                eurephia_log(ctx, LOG_ERROR, 0, "Quering the lastlog failed");
                                xmlFreeDoc(doc);
                                return NULL;
                        }

                        lastl = xmlNewChild(root_n, NULL, (xmlChar *) "lastlog", NULL);
                        for( i = 0; i < sqlite_get_numtuples(qres); i++ ) {

                                sess = xmlNewChild(lastl, NULL, (xmlChar*) "session", NULL);
                                sqlite_xml_value(sess, XML_ATTR, "llid",                  qres, i, 0);
                                xmlNewProp(sess, (xmlChar *) "session_status",
                                           SESSION_STATUS[atoi_nullsafe(sqlite_get_value(qres, i, 8))]);
                                sqlite_xml_value(sess, XML_ATTR, "session_duration",      qres, i, 12);
                                sqlite_xml_value(sess, XML_NODE, "sessionkey",            qres, i, 9);
                                sqlite_xml_value(sess, XML_NODE, "login",                 qres, i, 10);
                                sqlite_xml_value(sess, XML_NODE, "logout",                qres, i, 11);
                                sqlite_xml_value(sess, XML_NODE, "session_closed",        qres, i, 13);

                                tmp1 = xmlNewChild(sess, NULL, (xmlChar *) "connection", NULL);
                                sqlite_xml_value(tmp1, XML_ATTR, "bytes_sent",            qres, i, 14);
                                sqlite_xml_value(tmp1, XML_ATTR, "bytes_received",        qres, i, 15);
                                sqlite_xml_value(tmp1, XML_NODE, "protocol",              qres, i, 2);
                                sqlite_xml_value(tmp1, XML_NODE, "remote_host",           qres, i, 3);
                                sqlite_xml_value(tmp1, XML_NODE, "remote_port",           qres, i, 4);
                                sqlite_xml_value(tmp1, XML_NODE, "vpn_macaddr",           qres, i, 5);
                                sqlite_xml_value(tmp1, XML_NODE, "vpn_ipaddr" ,           qres, i, 6);
                                sqlite_xml_value(tmp1, XML_NODE, "vpn_netmask",           qres, i, 7);

                                tmp1 = xmlNewChild(sess, NULL, (xmlChar *) "certificate", NULL);
                                sqlite_xml_value(tmp1, XML_ATTR, "certid",                qres, i, 1);
                                sqlite_xml_value(tmp1, XML_ATTR, "uicid",                 qres, i, 16);
                                sqlite_xml_value(tmp1, XML_ATTR, "depth",                 qres, i, 20);
                                sqlite_xml_value(tmp1, XML_NODE, "digest",                qres, i, 21);
                                sqlite_xml_value(tmp1, XML_NODE, "common_name",           qres, i, 22);
                                sqlite_xml_value(tmp1, XML_NODE, "organisation",          qres, i, 23);
                                sqlite_xml_value(tmp1, XML_NODE, "email",                 qres, i, 24);

                                tmp2 = sqlite_xml_value(tmp1, XML_NODE, "access_profile", qres, i, 18);
                                sqlite_xml_value(tmp2, XML_ATTR, "accessprofile",         qres, i, 17);
                                sqlite_xml_value(tmp2, XML_ATTR, "fwdestination",         qres, i, 19);
                        }
                        sqlite_free_results(qres);
                }

                if( (getInfo & USERINFO_attempts) == USERINFO_attempts ) {
                        xmlNode *atmpt = NULL;

                        qres = sqlite_query(ctx,
                                            "SELECT attempts, registered, last_attempt, atpid"
                                            "  FROM openvpn_attempts "
                                            " WHERE username = '%q'", username);

                        if( (qres == NULL) || (sqlite_get_numtuples(qres) > 1) ) {
                                eurephia_log(ctx, LOG_ERROR, 0, "Quering for login attempts failed");
                                sqlite_free_results(qres);
                                xmlFreeDoc(doc);
                                return NULL;
                        }

                        atmpt = xmlNewChild(root_n, NULL, (xmlChar *) "attempts", NULL);
                        if( sqlite_get_numtuples(qres) == 1 ) {
                                sqlite_xml_value(atmpt, XML_ATTR, "atpid", qres, 0, 3);
                                sqlite_xml_value(atmpt, XML_ATTR, "attempts", qres, 0, 0);
                                sqlite_xml_value(atmpt, XML_NODE, "first_attempt", qres, 0, 1);
                                sqlite_xml_value(atmpt, XML_NODE, "last_attempt", qres, 0, 2);
                        }
                        sqlite_free_results(qres);
                }

                if( (getInfo & USERINFO_blacklist) == USERINFO_blacklist ) {
                        xmlNode *atmpt = NULL;

                        qres = sqlite_query(ctx,
                                            "SELECT registered, last_accessed, blid"
                                            "  FROM openvpn_blacklist "
                                            " WHERE username = '%q'", username);

                        if( (qres == NULL) || (sqlite_get_numtuples(qres) > 1) ) {
                                eurephia_log(ctx, LOG_ERROR, 0, "Quering blacklist log failed");
                                sqlite_free_results(qres);
                                xmlFreeDoc(doc);
                                return NULL;
                        }

                        atmpt = xmlNewChild(root_n, NULL, (xmlChar *) "blacklist", NULL);
                        if( sqlite_get_numtuples(qres) == 1 ) {
                                sqlite_xml_value(atmpt, XML_ATTR, "blid", qres, 0, 2);
                                sqlite_xml_value(atmpt, XML_NODE, "blacklisted", qres, 0, 0);
                                sqlite_xml_value(atmpt, XML_NODE, "last_accessed", qres, 0, 1);
                        }
                        sqlite_free_results(qres);
                }

                sqlite_free_results(uinf);
                return doc;
        default:
                sqlite_free_results(uinf);
                eurephia_log(ctx, LOG_ERROR, 0, "Too many user records was found.");
                return NULL;
        }
}


// This function will add a user to the openvpn_users table, based on the
// XML document given.
//
// XML format:
//    <eurephia format="1">
//       <add_user>
//           <fieldMapping table="users">
//               <username>{user name}</username>
//               <password pwhash="{none|sha512}">{password}</password>"
//           </fieldMapping>
//       </add_user>
//    </eurephia>
//
int eDBadminAddUser(eurephiaCTX *ctx, xmlDoc *usrinf) {
        dbresult *res = NULL;
        xmlNode *usrinf_n = NULL;
        eDBfieldMap *usrinf_map = NULL;
        int rc = 0;

        assert( (ctx != NULL) && (usrinf != NULL) );

        // Get the add_user node, and then find the fieldMapping node
        usrinf_n = eurephiaXML_getRoot(ctx, usrinf, "add_user", 1);
        if( usrinf_n == NULL ) {
                eurephia_log(ctx, LOG_ERROR, 0, "Could not find proper add user XML document");
                return 0;
        }
        usrinf_n = xmlFindNode(usrinf_n, "fieldMapping");
        if( usrinf_n == NULL ) {
                eurephia_log(ctx, LOG_ERROR, 0, "Could not find proper add user XML document");
                return 0;
        }

        // Get a proper field mapping to be used by the database
        usrinf_map = eDBxmlMapping(ctx, tbl_sqlite_users, NULL, usrinf_n);
        assert( usrinf_map != NULL );

        // Register the user
        res = sqlite_query_mapped(ctx, SQL_INSERT, "INSERT INTO openvpn_users", usrinf_map, NULL);
        if( res == NULL ) {
                eurephia_log(ctx, LOG_FATAL, 0, "Could not register the new user account");
                rc = 0;
        } else {
                rc = 1;
        }
        sqlite_free_results(res);
        eDBfreeMapping(usrinf_map);

        return rc;
}


// This function will update a user account based on the XML document sent in as a parameter.
// The function will double check that the uid in the argument list and the uid in the XML
// document is coherent.
//
// The format of the input XML is:
//   <eurephia format="1">
//       <update_user uid="{uid}">
//           <fieldMapping table="users">
//              <{field name}>{new value}</{field name}>
//           </fieldMapping>
//       </update_user>
//   </eurephia>
//
int eDBadminUpdateUser(eurephiaCTX *ctx, const int uid, xmlDoc *usrinf) {
        dbresult *uinf = NULL;
        xmlDoc *srch_xml = NULL;
        xmlNode *root_n = NULL, *srch_n = NULL, *values_n = NULL;
        eDBfieldMap *value_map = NULL, *srch_map = NULL;
        xmlChar *xmluid = 0;

        assert( (ctx != NULL) && (usrinf != NULL) );

        // Get the update_user node
        root_n = eurephiaXML_getRoot(ctx, usrinf, "update_user", 1);
        if( root_n == NULL ) {
                eurephia_log(ctx, LOG_ERROR, 0, "Could not find proper XML element for user update");
                return 0;
        }

        // Double check that we are going to update the right user
        xmluid = (xmlChar *)xmlGetAttrValue(root_n->properties, "uid");
        if( atoi_nullsafe((char *)xmluid) != uid ) {
                eurephia_log(ctx, LOG_ERROR, 0, "Mismatch between uid given as parameter and uid in XML");
                return 0;
        }

        // Grab the fieldMapping node and create a eDBfieldMap structure for it
        values_n = xmlFindNode(root_n, "fieldMapping");
        value_map = eDBxmlMapping(ctx, tbl_sqlite_users, NULL, values_n);

        // Create an eDBfieldMap structure for the srch_map (used for WHERE clause)
        eurephiaXML_CreateDoc(ctx, 1, "fieldMapping", &srch_xml, &srch_n);
        xmlNewProp(srch_n, (xmlChar *) "table", (xmlChar *) "users");
        xmlNewChild(srch_n, NULL, (xmlChar *) "uid", xmluid);  // Add uid as the only criteria
        srch_map = eDBxmlMapping(ctx, tbl_sqlite_users, NULL, srch_n);
        assert( srch_map != NULL );

        // UPDATE the database
        uinf = sqlite_query_mapped(ctx, SQL_UPDATE, "UPDATE openvpn_users", value_map, srch_map);

        if( uinf == NULL ) {
                eurephia_log(ctx, LOG_ERROR, 0, "Error querying the database for a user");
                return 0;
        }
        sqlite_free_results(uinf);

        eDBfreeMapping(srch_map);
        eDBfreeMapping(value_map);
        xmlFreeDoc(srch_xml);

        return 1;
}

// This function will delete a user to the openvpn_users table, based on the
// XML document given.  The uid of the account to be deleted must also be sent
// as a separate parameter, as a security feature
//
// XML format:
//   <eurephia format="1">
//       <delete_user uid="{uid}"/>
//   </eurephia>
//
int eDBadminDeleteUser(eurephiaCTX *ctx, const int uid, xmlDoc *usrinf) {
        dbresult *res = NULL;
        xmlNode *usrinf_n = NULL;
        char *uid_str = NULL;
        int rc = 0;

        assert( (ctx != NULL) && (usrinf != NULL) );

        // Get the delete_user node
        usrinf_n = eurephiaXML_getRoot(ctx, usrinf, "delete_user", 1);
        if( usrinf_n == NULL ) {
                eurephia_log(ctx, LOG_ERROR, 0, "Could not find proper delete user XML document");
                return 0;
        }

        // Get the uid from the XML and compare it with the uid in the function argument
        uid_str = xmlGetAttrValue(usrinf_n->properties, "uid");
        if( (uid_str == NULL) || (atoi_nullsafe(uid_str) != uid) ) {
                eurephia_log(ctx, LOG_ERROR, 0, "Could not find proper delete user XML document. (uid mismatch)");
                return 0;
        }

        // Delete the user
        res = sqlite_query(ctx, "DELETE FROM openvpn_users WHERE uid = '%i'", uid);
        if( res == NULL ) {
                eurephia_log(ctx, LOG_FATAL, 0, "Could not delete the user account");
                rc = 0;
        } else {
                rc = 1;
        }
        sqlite_free_results(res);
        return rc;
}


xmlDoc *eDBadminGetCertificateList(eurephiaCTX *ctx, const char *sortkeys) {
        return NULL;
}

xmlDoc *eDBadminGetCertificateInfo(eurephiaCTX *ctx, xmlDoc *srchkey) {
        return NULL;
}

int eDBadminAddCertificate(eurephiaCTX *ctx, xmlDoc *crtinf) {
        return 0;
}

int eDBadminDeleteCertificate(eurephiaCTX *ctx, const int uid, xmlDoc *crtinf) {
        return 0;
}

xmlDoc *eDBadminGetLastlog(eurephiaCTX *ctx, xmlDoc *usersrch, xmlDoc *certsrch,
                                    const char *sortkeys)
{
        return NULL;
}

xmlDoc *eDBadminGetAttemptsLog(eurephiaCTX *ctx, xmlDoc *usersrch, xmlDoc *certsrch,
                                        const char *sortkeys)
{
        return NULL;
}

#endif