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# frozen_string_literal: true
require_relative 'test_helper'
class EncryptionTest < Minitest::Test
ENCRYPT_ZIP_TEST_FILE = 'test/data/zipWithEncryption.zip'
AES_128_ZIP_TEST_FILE = 'test/data/zip-aes-128.zip'
AES_256_ZIP_TEST_FILE = 'test/data/zip-aes-256.zip'
AES_KEKA_ZIP_TEST_FILE = 'test/data/aes-keka.zip'
INPUT_FILE1 = 'test/data/file1.txt'
INPUT_FILE2 = 'test/data/file2.txt'
INPUT_FILE3 = 'test/data/zip-aes-128.txt'
INPUT_FILE4 = 'test/data/zip-aes-256.txt'
INPUT_FILE5 = 'test/data/mimetype'
def setup
Zip.default_compression = ::Zlib::DEFAULT_COMPRESSION
end
def teardown
Zip.reset!
end
def test_encrypt
content = File.read(INPUT_FILE1)
test_filename = 'top_secret_file.txt'
password = 'swordfish'
encrypted_zip = Zip::OutputStream.write_buffer(
::StringIO.new,
encrypter: Zip::TraditionalEncrypter.new(password)
) do |out|
out.put_next_entry(test_filename)
out.write content
end
Zip::InputStream.open(
encrypted_zip, decrypter: Zip::TraditionalDecrypter.new(password)
) do |zis|
entry = zis.get_next_entry
assert_equal test_filename, entry.name
assert_equal 1_327, entry.size
assert_equal content, zis.read
end
error = assert_raises(Zip::DecompressionError) do
Zip::InputStream.open(
encrypted_zip,
decrypter: Zip::TraditionalDecrypter.new("#{password}wrong")
) do |zis|
zis.get_next_entry
assert_equal content, zis.read
end
end
assert_match(/Zlib error \('.+'\) while inflating\./, error.message)
end
def test_decrypt
Zip::InputStream.open(
ENCRYPT_ZIP_TEST_FILE,
decrypter: Zip::TraditionalDecrypter.new('password')
) do |zis|
entry = zis.get_next_entry
assert_equal 'file1.txt', entry.name
assert_equal 1_327, entry.size
assert_equal ::File.read(INPUT_FILE1), zis.read
entry = zis.get_next_entry
assert_equal 'file2.txt', entry.name
assert_equal 41_234, entry.size
assert_equal ::File.read(INPUT_FILE2), zis.read
end
end
def test_aes_128_decrypt
Zip::InputStream.open(
AES_128_ZIP_TEST_FILE,
decrypter: Zip::AESDecrypter.new('password', Zip::AESEncryption::STRENGTH_128_BIT)
) do |zis|
entry = zis.get_next_entry
assert_equal 'a', entry.name
assert_equal 1, entry.size
assert_equal ::File.read(INPUT_FILE3), zis.read
end
end
def test_aes_256_decrypt
Zip::InputStream.open(
AES_256_ZIP_TEST_FILE,
decrypter: Zip::AESDecrypter.new('password', Zip::AESEncryption::STRENGTH_256_BIT)
) do |zis|
entry = zis.get_next_entry
assert_equal 'a', entry.name
assert_equal 0, entry.size
assert_equal '', zis.read
entry = zis.get_next_entry
assert_equal 'b', entry.name
assert_equal 1, entry.size
assert_equal ::File.read(INPUT_FILE4), zis.read
end
end
def test_aes_decrypt_keka
Zip::InputStream.open(
AES_KEKA_ZIP_TEST_FILE,
decrypter: Zip::AESDecrypter.new('swordfish', Zip::AESEncryption::STRENGTH_256_BIT)
) do |zis|
entry = zis.get_next_entry
assert_equal 'file2.txt', entry.name
assert_equal 41_234, entry.size
assert_equal ::File.read(INPUT_FILE2), zis.read
entry = zis.get_next_entry
assert_equal 'mimetype', entry.name
assert_equal 20, entry.size
assert_equal ::File.read(INPUT_FILE5), zis.read
end
end
end
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