*
* @param string $username
* @param string $password
+ * @return mixed can return FALSE if authentication failed, a DB row as an
+ * associative array if authentication was succesful or an associative
+ * array with LDAP user information if authentication with LDAP was
+ * successful but the user logged in for the first time and it does not
+ * have an entry in `users` table yet. The key 'auth_src' distinguishes
+ * which associative array was returned:
+ * <ul>
+ * <li>'internal' or 'ldap': a DB row</li>
+ * <li>'ldap_first_time': LDAP user information</li>
+ * </ul>
*/
public function login($username, $password)
{
$enc_password = sha1($password);
// TODO select only required fields.
- $query = $this->db->query("SELECT * FROM `users`
- WHERE $cond_user AND password = '$enc_password'");
+ $query = $this->db->query("SELECT u.*, a.activation_code
+ FROM `users` u LEFT JOIN `users_unactivated` a ON (u.id = a.user_id)
+ WHERE $cond_user
+ AND (auth_src = 'ldap' OR password = '$enc_password')");
- if ($query->num_rows() !== 1)
+ // It is possible that the user has a LDAP account but he's
+ // authenticating here for the first time so it does not have an entry
+ // in `users` table.
+ if ($query->num_rows() === 0)
+ {
+ $ldap_userdata = $this->ldap_login($username, $password);
+ if ($ldap_userdata === FALSE)
+ return FALSE;
+ $userdata = $this->convert_ldap_userdata($ldap_userdata);
+ $this->register($userdata);
+
+ $user = $this->login($username, $password);
+ $user['import'] = TRUE;
+ return $user;
+ }
+
+ $user = $query->row_array();
+
+ // Authenticate with LDAP.
+ if ($user['auth_src'] == 'ldap'
+ && ! $this->ldap_login($username, $password))
+ return FALSE;
+
+ if (empty($user['email']) || empty($user['first_name'])
+ || empty($user['last_name']))
+ $user['import'] = TRUE;
+
+ // Update last login time.
+ $this->db->query("UPDATE `users`
+ SET last_login = UTC_TIMESTAMP()
+ WHERE username = '$username'");
+
+ // If we are here internal authentication has successful.
+ return $user;
+ }
+
+ /**
+ * Converts an array returned by LDAP login to an array which contains
+ * user data ready to be used in `users` DB.
+ *
+ * @param array $ldap_userdata
+ * @return array
+ */
+ public function convert_ldap_userdata($ldap_userdata)
+ {
+ $userdata['username'] = $ldap_userdata['uid'][0];
+ $userdata['email'] = $ldap_userdata['mail'][0];
+ $userdata['first_name'] = $ldap_userdata['givenname'][0];
+ $userdata['last_name'] = $ldap_userdata['sn'][0];
+
+ $userdata['auth_src'] = 'ldap';
+
+ return $userdata;
+ }
+
+ /**
+ * Login with LDAP.
+ *
+ * @param string $username
+ * @param string $password
+ * @return boolean
+ * @author Alex Herișanu, Răzvan Deaconescu, Călin-Andrei Burloiu
+ */
+ public function ldap_login($username, $password)
+ {
+ $this->config->load('ldap');
+
+ // First connection: binding.
+ // TODO exception
+ $ds = ldap_connect($this->config->item('ldap_server')) or die("Can't connect to ldap server.\n");
+ if (!@ldap_bind($ds, $this->config->item('ldap_bind_user'),
+ $this->config->item('ldap_bind_password')))
+ {
+ ldap_close($ds);
+ die("Can't connect to ".$this->config->item('ldap_server')."\n");
return FALSE;
-
- return $query->row_array();
+ }
+ $sr = ldap_search($ds, "dc=cs,dc=curs,dc=pub,dc=ro", "(uid=" . $username . ")");
+ if (ldap_count_entries($ds, $sr) > 1)
+ die("Multiple entries with the same uid in LDAP database??");
+ if (ldap_count_entries($ds, $sr) < 1) {
+ ldap_close($ds);
+ return FALSE;
+ }
+
+ $info = ldap_get_entries($ds, $sr);
+ $dn = $info[0]["dn"];
+ ldap_close($ds);
+
+ // Second connection: connect with user's credentials.
+ $ds = ldap_connect($this->config->item('ldap_server')) or die("Can't connect to ldap server\n");
+ if (!@ldap_bind($ds, $dn, $password) or $password == '') {
+ ldap_close($ds);
+ return FALSE;
+ }
+
+ // Verifify if DN belongs to the requested OU.
+ $info[0]['ou_ok'] = $this->ldap_dn_belongs_ou( $dn, $this->config->item('ldap_req_ou') );
+
+ // Set authentication source.
+ $info[0]['auth_src'] = 'ldap_first_time';
+
+ return $info[0];
+ }
+
+ /**
+ * Verify if a user belongs to a group.
+ *
+ * @param string $dn = "ou=Student,ou=People..."
+ * @param array $ou = array ("Student", etc
+ * @return TRUE or FALSE
+ * @author Răzvan Herișanu, Răzvan Deaconescu, Călin-Andrei Burloiu
+ */
+ public function ldap_dn_belongs_ou($dn, $ou)
+ {
+ if (!is_array($ou))
+ $ou = array ($ou);
+
+ $founded = FALSE;
+ $words = explode(',', $dn);
+ foreach ($words as $c) {
+ $parts = explode("=", $c);
+ $key = $parts[0];
+ $value = $parts[1];
+
+ if (strtolower($key) == "ou" && in_array($value, $ou) )
+ $founded = TRUE;
+ }
+
+ return $founded;
+ }
+
+ /**
+ * Adds a new user to DB.
+ * Do not add join_date and last_login column, they will be automatically
+ * added.
+ *
+ * @param array $data corresponds to DB columns
+ */
+ public function register($data)
+ {
+ $this->load->helper('array');
+
+ // TODO verify mandatory data existance
+
+ // Process data.
+ if (isset($data['password']))
+ $data['password'] = sha1($data['password']);
+ // TODO picture data: save, convert, make it thumbnail
+
+ if (empty($data['birth_date']))
+ $data['birth_date'] = NULL;
+
+ $cols = '';
+ $vals = '';
+ foreach ($data as $col=> $val)
+ {
+ if ($val === NULL)
+ {
+ $cols .= "$col, ";
+ $vals .= "NULL, ";
+ continue;
+ }
+
+ $cols .= "$col, ";
+ if (is_int($val))
+ $vals .= "$val, ";
+ else if (is_string($val))
+ $vals .= "'$val', ";
+ }
+ $cols = substr($cols, 0, -2);
+ $vals = substr($vals, 0, -2);
+
+ $query = $this->db->query("INSERT INTO `users`
+ ($cols, registration_date, last_login)
+ VALUES ($vals, utc_timestamp(), utc_timestamp())");
+ if ($query === FALSE)
+ return FALSE;
+
+ // If registered with internal authentication it needs to activate
+ // the account.
+ if ($data['auth_src'] == 'internal')
+ {
+ $activation_code = Users_model::gen_activation_code($data['username']);
+ $user_id = $this->get_user_id($data['username']);
+ $query = $this->db->query("INSERT INTO `users_unactivated`
+ (user_id, activation_code)
+ VALUES ($user_id, '$activation_code')");
+ $this->send_activation_email($user_id, $data['email'],
+ $activation_code, $data['username']);
+ }
+
+ // TODO exception on failure
+ return $query;
+ }
+
+ public function get_user_id($username)
+ {
+ $query = $this->db->query("SELECT id FROM `users`
+ WHERE username = '$username'");
+
+ if ($query->num_rows() === 0)
+ return FALSE;
+
+ return $query->row()->id;
+ }
+
+ // TODO cleanup account activation
+ public function cleanup_account_activation()
+ {
+
+ }
+
+ /**
+ * Activated an account for an user having $user_id with $activation_code.
+ *
+ * @param int $user_id
+ * @param string $activation_code hexa 16 characters string
+ * @return returns TRUE if activation was successful and FALSE otherwise
+ */
+ public function activate_account($user_id, $activation_code)
+ {
+ $query = $this->db->query("SELECT * FROM `users_unactivated`
+ WHERE user_id = $user_id
+ AND activation_code = '$activation_code'");
+
+ if ($query->num_rows() === 0)
+ return FALSE;
+
+ $this->db->query("DELETE FROM `users_unactivated`
+ WHERE user_id = $user_id");
+
+ return TRUE;
+ }
+
+ public function send_activation_email($user_id, $email = NULL,
+ $activation_code = NULL, $username = NULL)
+ {
+ if (!$activation_code || !$email || !$username)
+ {
+ if (!$email)
+ $cols = 'email, ';
+ else
+ $cols = '';
+
+ $userdata = $this->get_userdata($user_id,
+ $cols. "a.activation_code, username");
+ $activation_code =& $userdata['activation_code'];
+
+ if (!$email)
+ $email =& $userdata['email'];
+ $username =& $userdata['username'];
+ }
+
+ if ($activation_code === NULL)
+ return TRUE;
+
+ $subject = '['. $this->config->item('site_name')
+ . '] Account Activation';
+ $activation_url =
+ site_url("user/activate/$user_id/code/$activation_code");
+ $msg = sprintf($this->lang->line('user_activation_email_content'),
+ $username, $this->config->item('site_name'), site_url(),
+ $activation_url, $activation_code);
+ $headers = "From: ". $this->config->item('noreply_email');
+
+ return mail($email, $subject, $msg, $headers);
+ }
+
+ public function recover_password($username, $email)
+ {
+ $userdata = $this->get_userdata($username, 'email, username, id');
+
+ if (strcmp($userdata['email'], $email) !== 0)
+ return FALSE;
+
+ $recovered_password = Users_model::gen_password();
+
+ $this->set_userdata(intval($userdata['id']), array('password'=>
+ $recovered_password));
+
+ $subject = '['. $this->config->item('site_name')
+ . '] Password Recovery';
+ $msg = sprintf($this->lang->line('user_password_recovery_email_content'),
+ $username, $this->config->item('site_name'), site_url(),
+ $recovered_password);
+ $headers = "From: ". $this->config->item('noreply_email');
+
+ mail($email, $subject, $msg, $headers);
+
+ return TRUE;
+ }
+
+ /**
+ * Returns data from `users` table. If $user is int it is used as an
+ * id, if it is string it is used as an username.
+ *
+ * @param mixed $user
+ * @param string $table_cols (optional) string with comma separated
+ * `users` table column names. Use a.activation_code to check user's
+ * account activation_code. If this value is NULL than the account is
+ * active.
+ * @return array associative array with userdata from DB
+ */
+ public function get_userdata($user, $table_cols = '*')
+ {
+ if (is_int($user))
+ $cond = "id = $user";
+ else
+ $cond = "username = '$user'";
+
+ $query = $this->db->query("SELECT $table_cols
+ FROM `users` u LEFT JOIN `users_unactivated` a
+ ON (u.id = a.user_id)
+ WHERE $cond");
+
+ if ($query->num_rows() === 0)
+ return FALSE;
+
+ $userdata = $query->row_array();
+
+ // Post process userdata.
+ if (isset($userdata['picture']))
+ {
+ $userdata['picture_thumb'] = site_url(
+ "data/user_pictures/{$userdata['picture']}-thumb.jpg");
+ $userdata['picture'] = site_url(
+ "data/user_pictures/{$userdata['picture']}");
+ }
+
+ return $userdata;
+ }
+
+ /**
+ * Modifies data from `users` table for user with $user_id.
+ *
+ * @param int $user_id
+ * @param array $data key-value pairs with columns and new values to be
+ * modified
+ * @return boolean returns TRUE on success and FALSE otherwise
+ */
+ public function set_userdata($user_id, $data)
+ {
+ // TODO verify mandatory data existance
+
+ // Process data.
+ if (isset($data['password']))
+ $data['password'] = sha1($data['password']);
+ // TODO picture data: save, convert, make it thumbnail
+
+ if (empty($data['birth_date']))
+ $data['birth_date'] = NULL;
+
+ $set = '';
+ foreach ($data as $col => $val)
+ {
+ if ($val === NULL)
+ {
+ $set .= "$col = NULL, ";
+ continue;
+ }
+
+ if (is_int($val))
+ $set .= "$col = $val, ";
+ else if (is_string($val))
+ $set .= "$col = '$val', ";
+ }
+ $set = substr($set, 0, -2);
+
+ $query_str = "UPDATE `users`
+ SET $set WHERE id = $user_id";
+ //echo "<p>$query_str</p>";
+ $query = $this->db->query($query_str);
+
+ // TODO exception
+ return $query;
+ }
+
+ public static function gen_activation_code($str = '')
+ {
+ $ci =& get_instance();
+
+ $activation_code = substr(
+ sha1(''. $str. $ci->config->item('encryption_key')
+ . mt_rand()),
+ 0,
+ 16);
+
+ return $activation_code;
+ }
+
+ public static function gen_password()
+ {
+ $ci =& get_instance();
+ $length = 16;
+ $chars = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ,.?!_-';
+ $len_chars = strlen($chars);
+ $enc_key = $ci->config->item('encryption_key');
+ $len_enc_key = strlen($enc_key);
+ $password = '';
+
+ for ($p = 0; $p < $length; $p++)
+ {
+ $i = (mt_rand(1, 100) * ord($enc_key[ mt_rand(0, $len_enc_key-1) ]))
+ % $len_chars;
+ $password .= $chars[$i];
+ }
+
+ return $password;
+ }
+
+ public static function roles_to_string($roles)
+ {
+ $ci =& get_instance();
+ $ci->lang->load('user');
+
+ if ($roles == USER_ROLE_STANDARD)
+ return $ci->lang->line('user_role_standard');
+ else
+ {
+ $str_roles = '';
+
+ if ($roles & USER_ROLE_ADMIN)
+ $str_roles .= $ci->lang->line('user_role_admin') . '; ';
+ }
+
+ return $str_roles;
}
}
projects / living-lab-site.git / blobdiff