public void ForwardedRequestInterceptor_transitions_xforwarded_headers_without_host_header()
{
const string url = "https://tt.invalid/";
var sut = new ForwardedRequestInterceptor(_loggerMock.Object)
{
ObfuscateForHeader = false
};
var interceptedRequest = new Mock <IInterceptedRequest>();
interceptedRequest.SetupGet(c => c.ClientRequestUri).Returns(new Uri(url));
interceptedRequest.SetupGet(c => c.ClientIpAddress).Returns(IPAddress.Parse("10.1.1.1"));
var mockHeaders = new Dictionary <string, string>()
{
[XForwardedForHeader] = "1.2.3.4",
[XForwardedProtoHeader] = "http",
[XForwardedPortHeader] = "8080",
[XForwardedPathHeader] = "/relay/user/target"
};
interceptedRequest.SetupGet(c => c.HttpHeaders).Returns(mockHeaders);
interceptedRequest.Setup(c => c.CloneHttpHeaders()).Returns(mockHeaders);
sut.OnRequestReceived(interceptedRequest.Object);
mockHeaders[ForwardedHeader].Should().Be("for=1.2.3.4,for=10.1.1.1;path=/relay/user/target;proto=http;host=tt.invalid:8080;");
}
public void ForwardedRequestInterceptor_default_configuration_doesnt_leak_private_ip()
{
const string url = "https://tt.invalid/";
var sut = new ForwardedRequestInterceptor(_loggerMock.Object);
var interceptedRequest = new Mock <IInterceptedRequest>();
interceptedRequest.SetupGet(c => c.ClientRequestUri).Returns(new Uri(url));
interceptedRequest.SetupGet(c => c.ClientIpAddress).Returns(IPAddress.Parse("10.1.1.1"));
var mockHeaders = new Dictionary <string, string>();
interceptedRequest.SetupGet(c => c.HttpHeaders).Returns(mockHeaders);
interceptedRequest.Setup(c => c.CloneHttpHeaders()).Returns(mockHeaders);
sut.OnRequestReceived(interceptedRequest.Object);
mockHeaders[ForwardedHeader].Should().NotBeNullOrWhiteSpace();
var forParameterValue = mockHeaders[ForwardedHeader]
.Split(new[] { ';' }, StringSplitOptions.RemoveEmptyEntries)
.Where(key => key.IndexOf("for=", StringComparison.InvariantCultureIgnoreCase) > -1)
.Select(p => p.Split('='))
.ToDictionary(kvp => kvp[0].Trim(), kvp => kvp[1].Trim())["for"];
forParameterValue.Should().StartWith("_", "Default configuration doesn't leak private IP");
}
public void ForwardedRequestInterceptor_removes_transitioned_xforwarded_headers()
{
const string url = "https://tt.invalid/path";
var sut = new ForwardedRequestInterceptor(_loggerMock.Object)
{
ObfuscateForHeader = false
};
var interceptedRequest = new Mock <IInterceptedRequest>();
interceptedRequest.SetupGet(c => c.ClientRequestUri).Returns(new Uri(url));
interceptedRequest.SetupGet(c => c.ClientIpAddress).Returns(IPAddress.Parse("2001:db8:85a3::8a2e:370:7334"));
var mockHeaders = new Dictionary <string, string>()
{
[XForwardedForHeader] = "1.2.3.4",
[XForwardedHostHeader] = "8.8.8.8",
[XForwardedPortHeader] = "8000",
};
interceptedRequest.SetupGet(c => c.HttpHeaders).Returns(mockHeaders);
interceptedRequest.Setup(c => c.CloneHttpHeaders()).Returns(mockHeaders);
sut.OnRequestReceived(interceptedRequest.Object);
mockHeaders.Count.Should().Be(1);
mockHeaders.ContainsKey(ForwardedHeader).Should().Be(true);
mockHeaders[ForwardedHeader].Should().Be("for=1.2.3.4,for=\"[2001:db8:85a3::8a2e:370:7334]\";host=8.8.8.8:8000;proto=https;path=/path;");
}
public void ForwardedRequestInterceptor_ignores_xforwarded_headers_when_forwarded_header_is_already_present()
{
const string url = "https://tt.invalid/path";
var sut = new ForwardedRequestInterceptor(_loggerMock.Object)
{
ObfuscateForHeader = false
};
var interceptedRequest = new Mock <IInterceptedRequest>();
interceptedRequest.SetupGet(c => c.ClientRequestUri).Returns(new Uri(url));
interceptedRequest.SetupGet(c => c.ClientIpAddress).Returns(IPAddress.Parse("2001:db8:85a3::8a2e:370:7334"));
var mockHeaders = new Dictionary <string, string>()
{
[XForwardedForHeader] = "1.2.3.4",
[XForwardedHostHeader] = "platform934.tt.invalid",
[ForwardedHeader] = "for=1.2.3.4;"
};
interceptedRequest.SetupGet(c => c.HttpHeaders).Returns(mockHeaders);
interceptedRequest.Setup(c => c.CloneHttpHeaders()).Returns(mockHeaders);
sut.OnRequestReceived(interceptedRequest.Object);
mockHeaders[ForwardedHeader].Should().Be("for=1.2.3.4,for=\"[2001:db8:85a3::8a2e:370:7334]\";host=tt.invalid;proto=https;path=/path;");
}
public void ForwardedRequestInterceptor_applies_forwarded_header()
{
const string url = "http://[2001:db8:85a3::8a2e:370:7334]:20000/relay";
var sut = new ForwardedRequestInterceptor(_loggerMock.Object)
{
ObfuscateForHeader = false
};
var interceptedRequest = new Mock <IInterceptedRequest>();
interceptedRequest.SetupGet(c => c.ClientRequestUri).Returns(new Uri(url));
interceptedRequest.SetupGet(c => c.ClientIpAddress).Returns(IPAddress.Parse("10.1.1.1"));
var mockHeaders = new Dictionary <string, string>();
interceptedRequest.SetupGet(c => c.HttpHeaders).Returns(mockHeaders);
interceptedRequest.Setup(c => c.CloneHttpHeaders()).Returns(mockHeaders);
sut.OnRequestReceived(interceptedRequest.Object);
mockHeaders[ForwardedHeader].Should().Be("for=10.1.1.1;host=\"[2001:db8:85a3::8a2e:370:7334]:20000\";proto=http;path=/relay;");
}
public void ForwardedRequestInterceptor_ipv6_intercepted_request_uri_is_handled()
{
const string url = "https://[2001:db8:85a3::8a2e:370:7334]/path";
var sut = new ForwardedRequestInterceptor(_loggerMock.Object)
{
ObfuscateForHeader = false
};
var interceptedRequest = new Mock <IInterceptedRequest>();
interceptedRequest.SetupGet(c => c.ClientRequestUri).Returns(new Uri(url));
interceptedRequest.SetupGet(c => c.ClientIpAddress).Returns(IPAddress.Parse("4.4.4.4"));
var mockHeaders = new Dictionary <string, string>()
{
[XForwardedPortHeader] = "8080"
};
interceptedRequest.SetupGet(c => c.HttpHeaders).Returns(mockHeaders);
interceptedRequest.Setup(c => c.CloneHttpHeaders()).Returns(mockHeaders);
sut.OnRequestReceived(interceptedRequest.Object);
mockHeaders[ForwardedHeader].Should().Be("for=4.4.4.4;host=\"[2001:db8:85a3::8a2e:370:7334]:8080\";proto=https;path=/path;");
}