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113 lines
3.5 KiB
113 lines
3.5 KiB
#-- encoding: UTF-8
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#-- copyright
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# OpenProject is a project management system.
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# Copyright (C) 2012-2018 the OpenProject Foundation (OPF)
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License version 3.
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#
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# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
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# Copyright (C) 2006-2017 Jean-Philippe Lang
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# Copyright (C) 2010-2013 the ChiliProject Team
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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# See docs/COPYRIGHT.rdoc for more details.
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#++
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module Redmine
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module Ciphering
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def self.included(base)
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base.extend ClassMethods
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end
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class << self
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def encrypt_text(text)
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if cipher_key.blank?
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text
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else
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c = OpenSSL::Cipher.new('aes-256-cbc')
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iv = c.random_iv
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c.encrypt
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c.key = cipher_key
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c.iv = iv
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e = c.update(text.to_s)
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e << c.final
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'aes-256-cbc:' + [e, iv].map { |v| Base64.encode64(v).strip }.join('--')
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end
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end
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def decrypt_text(text)
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if text && match = text.match(/\Aaes-256-cbc:(.+)\Z/)
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text = match[1]
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c = OpenSSL::Cipher.new('aes-256-cbc')
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e, iv = text.split('--').map { |s| Base64.decode64(s) }
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c.decrypt
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c.key = cipher_key
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c.iv = iv
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d = c.update(e)
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d << c.final
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else
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text
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end
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end
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def cipher_key
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key = OpenProject::Configuration['database_cipher_key'].to_s
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# With aes-256-cbc chosen to be the cipher,
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# keys need to be 32 bytes long. Ruby < 2.4 used to silently truncate the
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# key to the desired length but with
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# https://github.com/ruby/ruby/commit/ce635262f53b760284d56bb1027baebaaec175d1
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# we have to truncate it ourselves.
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key.blank? ? nil : Digest::SHA256.hexdigest(key)[0, 32]
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end
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end
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module ClassMethods
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def encrypt_all(attribute)
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!!transaction do
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all.each do |object|
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clear = object.send(attribute)
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object.send "#{attribute}=", clear
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raise(ActiveRecord::Rollback) unless object.save(validate: false)
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end
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end
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end
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def decrypt_all(attribute)
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!!transaction do
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all.each do |object|
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clear = object.send(attribute)
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object[attribute] = clear
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raise(ActiveRecord::Rollback) unless object.save(validate: false)
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end
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end
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end
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end
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private
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# Returns the value of the given ciphered attribute
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def read_ciphered_attribute(attribute)
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Redmine::Ciphering.decrypt_text(read_attribute(attribute))
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end
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# Sets the value of the given ciphered attribute
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def write_ciphered_attribute(attribute, value)
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write_attribute(attribute, Redmine::Ciphering.encrypt_text(value))
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end
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end
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end
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