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# frozen_string_literal: true
require_relative '../test_helper'
class AESDecrypterTest < Minitest::Test
def setup
@decrypter256 = ::Zip::AESDecrypter.new('password', ::Zip::AESEncryption::STRENGTH_256_BIT)
@decrypter128 = ::Zip::AESDecrypter.new('password', ::Zip::AESEncryption::STRENGTH_128_BIT)
end
def test_header_bytesize
assert_equal 18, @decrypter256.header_bytesize
end
def test_gp_flags
assert_equal 1, @decrypter256.gp_flags
end
def test_decrypt_aes256
header = [125, 138, 163, 42, 19, 1, 155, 66, 203, 174, 183, 235, 197, 122, 232, 68, 252, 225].pack('C*')
@decrypter256.reset!(header)
assert_equal 'a', @decrypter256.decrypt([161].map(&:chr).join)
end
def test_decrypt_aes128
header = [127, 254, 117, 113, 255, 209, 171, 131, 179, 106].pack('C*')
@decrypter128.reset!(header)
assert_equal [75, 4, 0].pack('C*'), @decrypter128.decrypt([34, 33, 106].map(&:chr).join)
end
def test_reset!
header = [125, 138, 163, 42, 19, 1, 155, 66, 203, 174, 183, 235, 197, 122, 232, 68, 252, 225].pack('C*')
@decrypter256.reset!(header)
assert_equal 'a', @decrypter256.decrypt([161].map(&:chr).join)
header = [118, 221, 166, 27, 165, 141, 24, 122, 227, 197, 52, 135, 222, 67, 221, 92, 231, 117].pack('C*')
@decrypter256.reset!(header)
assert_equal 'b', @decrypter256.decrypt([135].map(&:chr).join)
end
end
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