OpenProject is the leading open source project management software.
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openproject/app/validators/secure_context_uri_validato...

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#-- copyright
# OpenProject is an open source project management software.
# Copyright (C) 2012-2023 the OpenProject GmbH
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version 3.
#
# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
# Copyright (C) 2006-2013 Jean-Philippe Lang
# Copyright (C) 2010-2013 the ChiliProject Team
#
# 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; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# See COPYRIGHT and LICENSE files for more details.
#++
# Please see https://w3c.github.io/webappsec-secure-contexts/
# for a definition of "secure contexts".
# Basically, a host has to have either a HTTPS scheme or be
# localhost to provide a secure context.
class SecureContextUriValidator < ActiveModel::EachValidator
def validate_each(contract, attribute, value)
begin
uri = URI.parse(value)
rescue StandardError
contract.errors.add(attribute, :invalid_url)
return
end
# The URI could be parsable but not contain a host name
if uri.host.blank?
contract.errors.add(attribute, :invalid_url)
return
end
unless self.class.secure_context_uri?(uri)
contract.errors.add(attribute, :url_not_secure_context)
end
end
def self.secure_context_uri?(uri)
return true if uri.scheme == 'https' # https is always safe
return true if uri.host == 'localhost' # Simple localhost
return true if uri.host =~ /\.localhost\.?$/ # i.e. 'foo.localhost' or 'foo.localhost.'
# Check for loopback interface. The constructor can throw an exception for non IP addresses.
# Those are invalid. And if the host is an IP address then we can check if it is loopback.
begin
return true if IPAddr.new(uri.host).loopback?
rescue StandardError
return false
end
# uri.host is an IP but not a loopback
false
end
end