Merge pull request #80 from Lagovas/lagovas/add-ruby-acrawriter

add ruby acrawriter sources

.gitignore

@@ -44,7 +44,7 @@ dist/
 downloads/
 eggs/
 .eggs/
-lib/
+
 lib64/
 parts/
 sdist/

wrappers/ruby/acrawriter/Rakefile

@@ -0,0 +1,8 @@
+require 'rake/testtask'
+
+Rake::TestTask.new do |t|
+  t.libs << 'test'
+end
+
+desc "Run tests"
+task :default => :test

wrappers/ruby/acrawriter/acrawriter.gemspec

@@ -0,0 +1,15 @@
+Gem::Specification.new do |gem|
+  gem.name        = 'acrawriter'
+  gem.version     = '1.0.0'
+  gem.date        = '2016-10-10'
+  gem.summary     = "Wrapper for acra"
+  gem.description = "Wrapper for acra"
+  gem.authors     = ["Cossack Labs"]
+  gem.email       = 'dev@cossacklabs.com'
+  gem.files       = ["lib/acrawriter.rb"]
+  gem.test_files  = ["test/test_acrawriter.rb"]
+  gem.homepage    = 'http://cossacklabs.com/'
+  gem.license     = 'Apache 2.0'
+  gem.add_runtime_dependency 'rubythemis'
+  gem.requirements << 'libthemis, v0.9.3'
+end

wrappers/ruby/acrawriter/lib/acrawriter.rb

@@ -0,0 +1,19 @@
+require 'rubythemis'
+
+SYMMETRIC_KEY_LENGTH = 32
+
+BEGIN_TAG = '""""""""'.b
+def create_acrastruct(data, acra_public_key, context=nil)
+  if data.nil? or data == ''
+    return data
+  end
+  generator = Themis::SKeyPairGen.new
+  private, public = generator.ec
+  smessage = Themis::Smessage.new(private.to_s, acra_public_key.to_s)
+  random_key = Random.new.bytes(SYMMETRIC_KEY_LENGTH)
+  wrapped_random_key = smessage.wrap(random_key.to_s)
+  scell = Themis::Scell.new(random_key.to_s, Themis::Scell::SEAL_MODE)
+  encrypted_data = scell.encrypt(data, context)
+  data_length = Array(encrypted_data.length).pack('Q<')
+  BEGIN_TAG + public + wrapped_random_key + data_length + encrypted_data
+end

wrappers/ruby/acrawriter/test/test_acrawriter.rb

@@ -0,0 +1,11 @@
+require 'minitest/autorun'
+require 'rubythemis'
+require 'acrawriter'
+
+class TestAcrawriter < Minitest::Test
+  def test_create_acrastruct
+    generator = Themis::SKeyPairGen.new
+    private, public = generator.ec
+    create_acrastruct("some data", public, context=nil)
+  end
+end

wrappers/ruby/activerecord_acrawriter/activerecord_acrawriter.gemspec

@@ -0,0 +1,16 @@
+Gem::Specification.new do |gem|
+  gem.name        = 'activerecord_acrawriter'
+  gem.version     = '1.0.0'
+  gem.date        = '2017-02-16'
+  gem.summary     = "Extra type for active record with acrawriter usage"
+  gem.description = "Extra type for active record with acrawriter usage"
+  gem.authors     = ["Cossack Labs"]
+  gem.email       = 'dev@cossacklabs.com'
+  gem.files       = ["lib/activerecord_acrawriter.rb"]
+  gem.homepage    = 'http://cossacklabs.com/'
+  gem.license     = 'Apache 2.0'
+  gem.add_runtime_dependency 'rubythemis'
+  gem.add_runtime_dependency 'acrawriter'
+  gem.add_runtime_dependency 'activerecord'
+  gem.requirements << 'libthemis, v0.9.3'
+end

wrappers/ruby/activerecord_acrawriter/lib/activerecord_acrawriter.rb

@@ -0,0 +1,17 @@
+require 'active_record'
+require 'acrawriter'
+
+class AcraType < ActiveRecord::Type::String
+  def type_cast_for_database(value)
+    # scell can't encrypt null or empty objects
+    if value.nil? or value == ''
+      super
+    else
+      key = Base64.decode64(Rails.application.secrets.acra_public_key)
+      ActiveRecord::Base.connection.escape_bytea(create_acrastruct(value.b, key))
+    end
+  end
+  def type_cast_from_database(value)
+    ActiveRecord::Base.connection.unescape_bytea(value)
+  end
+end