362 lines
8.6 KiB
C
Executable File
362 lines
8.6 KiB
C
Executable File
/*
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* Copyright (C) 2008 Martin Willi
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* Copyright (C) 2008 Philip Boetschi, Adrian Doerig
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#define _GNU_SOURCE
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#include <string.h>
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#include "user_controller.h"
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#include <library.h>
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typedef struct private_user_controller_t private_user_controller_t;
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/**
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* private data of the user_controller
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*/
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struct private_user_controller_t {
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/**
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* public functions
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*/
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user_controller_t public;
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/**
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* database connection
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*/
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database_t *db;
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/**
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* user session
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*/
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user_t *user;
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/**
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* minimum required password length
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*/
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u_int password_length;
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};
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/**
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* hash the password for database storage
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*/
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static chunk_t hash_password(char *login, char *password)
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{
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hasher_t *hasher;
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chunk_t hash, data;
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hasher = lib->crypto->create_hasher(lib->crypto, HASH_SHA1);
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if (!hasher)
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{
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return chunk_empty;
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}
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data = chunk_cata("cc", chunk_create(login, strlen(login)),
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chunk_create(password, strlen(password)));
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hasher->allocate_hash(hasher, data, &hash);
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hasher->destroy(hasher);
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return hash;
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}
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/**
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* Login a user.
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*/
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static void login(private_user_controller_t *this, request_t *request)
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{
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if (request->get_query_data(request, "submit"))
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{
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char *login, *password;
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login = request->get_query_data(request, "login");
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password = request->get_query_data(request, "password");
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if (login && password)
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{
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enumerator_t *query;
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u_int id = 0;
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chunk_t hash;
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hash = hash_password(login, password);
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query = this->db->query(this->db,
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"SELECT id FROM user WHERE login = ? AND password = ?",
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DB_TEXT, login, DB_BLOB, hash, DB_UINT);
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if (query)
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{
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query->enumerate(query, &id);
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query->destroy(query);
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}
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free(hash.ptr);
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if (id)
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{
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this->user->set_user(this->user, id);
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return request->redirect(request, "peer/list");
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}
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}
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request->setf(request, "error=Invalid username or password.");
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}
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request->render(request, "templates/user/login.cs");
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}
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/**
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* Logout a user.
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*/
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static void logout(private_user_controller_t *this, request_t *request)
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{
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request->redirect(request, "user/login");
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request->close_session(request);
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}
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/**
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* verify a user entered username for validity
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*/
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static bool verify_login(private_user_controller_t *this, request_t *request,
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char *login)
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{
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if (!login || *login == '\0')
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{
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request->setf(request, "error=Username is missing.");
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return FALSE;
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}
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while (*login != '\0')
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{
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switch (*login)
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{
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case 'a' ... 'z':
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case 'A' ... 'Z':
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case '0' ... '9':
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case '-':
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case '_':
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case '@':
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case '.':
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login++;
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continue;
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default:
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request->setf(request, "error=Username invalid, "
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"valid characters: A-Z a-z 0-9 - _ @ .");
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}
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}
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return TRUE;
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}
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/**
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* verify a user entered password for validity
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*/
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static bool verify_password(private_user_controller_t *this, request_t *request,
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char *password, char *confirm)
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{
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if (!password || *password == '\0')
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{
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request->setf(request, "error=Password is missing.");
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return FALSE;
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}
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if (strlen(password) < this->password_length)
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{
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request->setf(request, "error=Password requires at least %d characters.",
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this->password_length);
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return FALSE;
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}
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if (!confirm || !streq(password, confirm))
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{
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request->setf(request, "error=Password not confirmed.");
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return FALSE;
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}
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return TRUE;
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}
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/**
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* Register a user.
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*/
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static void add(private_user_controller_t *this, request_t *request)
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{
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char *login = "";
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while (request->get_query_data(request, "register"))
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{
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char *password, *confirm;
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chunk_t hash;
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u_int id;
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login = request->get_query_data(request, "new_login");
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password = request->get_query_data(request, "new_password");
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confirm = request->get_query_data(request, "confirm_password");
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if (!verify_login(this, request, login) ||
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!verify_password(this, request, password, confirm))
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{
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break;
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}
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hash = hash_password(login, password);
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if (!hash.ptr || this->db->execute(this->db, &id,
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"INSERT INTO user (login, password) VALUES (?, ?)",
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DB_TEXT, login, DB_BLOB, hash) < 0)
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{
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request->setf(request, "error=Username already exists.");
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free(hash.ptr);
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break;
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}
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free(hash.ptr);
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this->user->set_user(this->user, id);
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return request->redirect(request, "peer/list");
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}
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request->set(request, "new_login", login);
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request->setf(request, "password_length=%d", this->password_length);
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request->render(request, "templates/user/add.cs");
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}
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/**
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* Edit the logged in user
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*/
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static void edit(private_user_controller_t *this, request_t *request)
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{
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enumerator_t *query;
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char *old_login;
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/* lookup old login */
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query = this->db->query(this->db, "SELECT login FROM user WHERE id = ?",
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DB_INT, this->user->get_user(this->user),
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DB_TEXT);
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if (!query || !query->enumerate(query, &old_login))
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{
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DESTROY_IF(query);
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request->close_session(request);
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return request->redirect(request, "user/login");
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}
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old_login = strdupa(old_login);
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query->destroy(query);
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/* back pressed */
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if (request->get_query_data(request, "back"))
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{
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return request->redirect(request, "peer/list");
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}
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/* delete pressed */
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if (request->get_query_data(request, "delete"))
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{
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this->db->execute(this->db, NULL, "DELETE FROM user WHERE id = ?",
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DB_UINT, this->user->get_user(this->user));
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this->db->execute(this->db, NULL,
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"DELETE FROM peer WHERE user = ?",
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DB_UINT, this->user->get_user(this->user));
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return logout(this, request);
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}
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/* save pressed */
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while (request->get_query_data(request, "save"))
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{
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char *new_login, *old_pass, *new_pass, *confirm;
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chunk_t old_hash, new_hash;
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new_login = request->get_query_data(request, "old_login");
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old_pass = request->get_query_data(request, "old_password");
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new_pass = request->get_query_data(request, "new_password");
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confirm = request->get_query_data(request, "confirm_password");
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if (!verify_login(this, request, new_login) ||
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!verify_password(this, request, new_pass, confirm))
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{
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old_login = new_login;
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break;
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}
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old_hash = hash_password(old_login, old_pass);
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new_hash = hash_password(new_login, new_pass);
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if (this->db->execute(this->db, NULL,
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"UPDATE user SET login = ?, password = ? "
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"WHERE id = ? AND password = ?",
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DB_TEXT, new_login, DB_BLOB, new_hash,
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DB_UINT, this->user->get_user(this->user), DB_BLOB, old_hash) <= 0)
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{
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free(new_hash.ptr);
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free(old_hash.ptr);
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old_login = new_login;
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request->setf(request, "error=Password verification failed.");
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break;
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}
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free(new_hash.ptr);
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free(old_hash.ptr);
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return request->redirect(request, "peer/list");
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}
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/* on error/template rendering */
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request->set(request, "old_login", old_login);
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request->setf(request, "password_length=%d", this->password_length);
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request->render(request, "templates/user/edit.cs");
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}
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/**
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* Implementation of controller_t.get_name
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*/
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static char* get_name(private_user_controller_t *this)
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{
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return "user";
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}
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/**
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* Implementation of controller_t.handle
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*/
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static void handle(private_user_controller_t *this, request_t *request, char *action)
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{
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if (action)
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{
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if (streq(action, "add"))
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{
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return add(this, request);
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}
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if (streq(action, "login"))
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{
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return login(this, request);
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}
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else if (streq(action, "logout"))
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{
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return logout(this, request);
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}
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else if (streq(action, "edit"))
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{
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return edit(this, request);
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}
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else if (streq(action, "help"))
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{
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return request->render(request, "templates/user/help.cs");
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}
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}
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request->redirect(request, "user/login");
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}
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/**
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* Implementation of controller_t.destroy
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*/
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static void destroy(private_user_controller_t *this)
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{
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free(this);
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}
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/*
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* see header file
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*/
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controller_t *user_controller_create(user_t *user, database_t *db)
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{
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private_user_controller_t *this= malloc_thing(private_user_controller_t);
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this->public.controller.get_name = (char*(*)(controller_t*))get_name;
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this->public.controller.handle = (void(*)(controller_t*, request_t*, char*, char*, char*, char*, char*))handle;
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this->public.controller.destroy = (void(*)(controller_t*))destroy;
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this->user = user;
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this->db = db;
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this->password_length = lib->settings->get_int(lib->settings,
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"medsrv.password_length", 6);
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return &this->public.controller;
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}
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