71 lines
2.5 KiB
Ruby
71 lines
2.5 KiB
Ruby
# frozen_string_literal: true
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describe FinalDestination::FastImage do
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before do
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# We need to test low-level stuff, switch off WebMock for FastImage
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WebMock.enable!(except: [:net_http])
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Socket.stubs(:tcp).never
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TCPSocket.stubs(:open).never
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Addrinfo.stubs(:getaddrinfo).never
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end
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after { WebMock.enable! }
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def expect_tcp_and_abort(stub_addr, &blk)
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success = Class.new(StandardError)
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TCPSocket.stubs(:open).with { |addr| stub_addr == addr }.once.raises(success)
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begin
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yield
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rescue success
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end
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end
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def stub_ip_lookup(stub_addr, ips)
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FinalDestination::SSRFDetector.stubs(:lookup_ips).with { |addr| stub_addr == addr }.returns(ips)
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end
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def stub_tcp_to_raise(stub_addr, exception)
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TCPSocket.stubs(:open).with { |addr| addr == stub_addr }.once.raises(exception)
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end
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it "uses the first resolved IP" do
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stub_ip_lookup("example.com", %w[1.1.1.1 2.2.2.2 3.3.3.3])
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expect_tcp_and_abort("1.1.1.1") do
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FinalDestination::FastImage.size(URI("https://example.com/img.jpg"))
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end
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end
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it "ignores private IPs" do
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stub_ip_lookup("example.com", %w[0.0.0.0 2.2.2.2])
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expect_tcp_and_abort("2.2.2.2") do
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FinalDestination::FastImage.size(URI("https://example.com/img.jpg"))
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end
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end
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it "returns a null object when all IPs are private" do
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stub_ip_lookup("example.com", %w[0.0.0.0 127.0.0.1])
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expect(FinalDestination::FastImage.size(URI("https://example.com/img.jpg"))).to eq(nil)
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end
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it "returns a null object if all IPs are blocked" do
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SiteSetting.blocked_ip_blocks = "98.0.0.0/8|78.13.47.0/24|9001:82f3::/32"
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stub_ip_lookup("ip6.example.com", %w[9001:82f3:8873::3])
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stub_ip_lookup("ip4.example.com", %w[98.23.19.111])
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expect(FinalDestination::FastImage.size(URI("https://ip4.example.com/img.jpg"))).to eq(nil)
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expect(FinalDestination::FastImage.size(URI("https://ip6.example.com/img.jpg"))).to eq(nil)
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end
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it "allows specified hosts to bypass IP checks" do
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SiteSetting.blocked_ip_blocks = "98.0.0.0/8|78.13.47.0/24|9001:82f3::/32"
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SiteSetting.allowed_internal_hosts = "internal.example.com|blocked-ip.example.com"
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stub_ip_lookup("internal.example.com", %w[0.0.0.0 127.0.0.1])
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stub_ip_lookup("blocked-ip.example.com", %w[98.23.19.111])
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expect_tcp_and_abort("0.0.0.0") do
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FinalDestination::FastImage.size(URI("https://internal.example.com/img.jpg"))
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end
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expect_tcp_and_abort("98.23.19.111") do
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FinalDestination::FastImage.size(URI("https://blocked-ip.example.com/img.jpg"))
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end
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end
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end
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