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# Redmine - project management software
# Copyright (C) 2006-2017 Jean-Philippe Lang
#
# 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.
module Redmine
module Ciphering
def self.included(base)
base.extend ClassMethods
end
class << self
def encrypt_text(text)
if cipher_key.blank? || text.blank?
text
else
c = OpenSSL::Cipher.new("aes-256-cbc")
iv = c.random_iv
c.encrypt
c.key = cipher_key
c.iv = iv
e = c.update(text.to_s)
e << c.final
"aes-256-cbc:" + [e, iv].map {|v| Base64.encode64(v).strip}.join('--')
end
end
def decrypt_text(text)
if text && match = text.match(/\Aaes-256-cbc:(.+)\Z/)
if cipher_key.blank?
logger.error "Attempt to decrypt a ciphered text with no cipher key configured in config/configuration.yml" if logger
return text
end
text = match[1]
c = OpenSSL::Cipher.new("aes-256-cbc")
e, iv = text.split("--").map {|s| Base64.decode64(s)}
c.decrypt
c.key = cipher_key
c.iv = iv
d = c.update(e)
d << c.final
else
text
end
end
def cipher_key
key = Redmine::Configuration['database_cipher_key'].to_s
key.blank? ? nil : Digest::SHA256.hexdigest(key)[0..31]
end
def logger
Rails.logger
end
end
module ClassMethods
def encrypt_all(attribute)
transaction do
all.each do |object|
clear = object.send(attribute)
object.send "#{attribute}=", clear
raise(ActiveRecord::Rollback) unless object.save(:validation => false)
end
end ? true : false
end
def decrypt_all(attribute)
transaction do
all.each do |object|
clear = object.send(attribute)
object.send :write_attribute, attribute, clear
raise(ActiveRecord::Rollback) unless object.save(:validation => false)
end
end ? true : false
end
end
private
# Returns the value of the given ciphered attribute
def read_ciphered_attribute(attribute)
Redmine::Ciphering.decrypt_text(read_attribute(attribute))
end
# Sets the value of the given ciphered attribute
def write_ciphered_attribute(attribute, value)
write_attribute(attribute, Redmine::Ciphering.encrypt_text(value))
end
end
end
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