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[release/6.0] Have kestrel filter out pseudo headers #36287

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Merged
merged 1 commit into from
Sep 8, 2021
Merged

[release/6.0] Have kestrel filter out pseudo headers #36287

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99 changes: 88 additions & 11 deletions src/Servers/Kestrel/Core/src/Internal/Http/HttpHeaders.Generated.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -227,7 +227,14 @@ public override StringValues HeaderConnection
}
set
{
_bits |= 0x2L;
if (!StringValues.IsNullOrEmpty(value))
{
_bits |= 0x2L;
}
else
{
_bits &= ~0x2L;
}
_headers._Connection = value;
}
}
Expand All @@ -244,7 +251,14 @@ public StringValues HeaderHost
}
set
{
_bits |= 0x4L;
if (!StringValues.IsNullOrEmpty(value))
{
_bits |= 0x4L;
}
else
{
_bits &= ~0x4L;
}
_headers._Host = value;
}
}
Expand All @@ -261,7 +275,14 @@ public StringValues HeaderAuthority
}
set
{
_bits |= 0x10L;
if (!StringValues.IsNullOrEmpty(value))
{
_bits |= 0x10L;
}
else
{
_bits &= ~0x10L;
}
_headers._Authority = value;
}
}
Expand All @@ -278,7 +299,14 @@ public StringValues HeaderMethod
}
set
{
_bits |= 0x20L;
if (!StringValues.IsNullOrEmpty(value))
{
_bits |= 0x20L;
}
else
{
_bits &= ~0x20L;
}
_headers._Method = value;
}
}
Expand All @@ -295,7 +323,14 @@ public StringValues HeaderPath
}
set
{
_bits |= 0x40L;
if (!StringValues.IsNullOrEmpty(value))
{
_bits |= 0x40L;
}
else
{
_bits &= ~0x40L;
}
_headers._Path = value;
}
}
Expand All @@ -312,7 +347,14 @@ public StringValues HeaderScheme
}
set
{
_bits |= 0x80L;
if (!StringValues.IsNullOrEmpty(value))
{
_bits |= 0x80L;
}
else
{
_bits &= ~0x80L;
}
_headers._Scheme = value;
}
}
Expand All @@ -329,7 +371,14 @@ public StringValues HeaderTransferEncoding
}
set
{
_bits |= 0x20000000000L;
if (!StringValues.IsNullOrEmpty(value))
{
_bits |= 0x20000000000L;
}
else
{
_bits &= ~0x20000000000L;
}
_headers._TransferEncoding = value;
}
}
Expand Down Expand Up @@ -8234,7 +8283,14 @@ public override StringValues HeaderConnection
}
set
{
_bits |= 0x1L;
if (!StringValues.IsNullOrEmpty(value))
{
_bits |= 0x1L;
}
else
{
_bits &= ~0x1L;
}
_headers._Connection = value;
_headers._rawConnection = null;
}
Expand All @@ -8252,7 +8308,14 @@ public StringValues HeaderAllow
}
set
{
_bits |= 0x1000L;
if (!StringValues.IsNullOrEmpty(value))
{
_bits |= 0x1000L;
}
else
{
_bits &= ~0x1000L;
}
_headers._Allow = value;
}
}
Expand All @@ -8269,7 +8332,14 @@ public StringValues HeaderAltSvc
}
set
{
_bits |= 0x2000L;
if (!StringValues.IsNullOrEmpty(value))
{
_bits |= 0x2000L;
}
else
{
_bits &= ~0x2000L;
}
_headers._AltSvc = value;
_headers._rawAltSvc = null;
}
Expand All @@ -8287,7 +8357,14 @@ public StringValues HeaderTransferEncoding
}
set
{
_bits |= 0x100000000L;
if (!StringValues.IsNullOrEmpty(value))
{
_bits |= 0x100000000L;
}
else
{
_bits &= ~0x100000000L;
}
_headers._TransferEncoding = value;
_headers._rawTransferEncoding = null;
}
Expand Down
6 changes: 5 additions & 1 deletion src/Servers/Kestrel/Core/src/Internal/Http2/Http2Stream.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -248,13 +248,14 @@ private bool TryValidatePseudoHeaders()
// enabling the use of HTTP to interact with non - HTTP services.
// A common example is TLS termination.
var headerScheme = HttpRequestHeaders.HeaderScheme.ToString();
HttpRequestHeaders.HeaderScheme = default; // Suppress pseduo headers from the public headers collection.
if (!ReferenceEquals(headerScheme, Scheme) &&
!string.Equals(headerScheme, Scheme, StringComparison.OrdinalIgnoreCase))
{
if (!ServerOptions.AllowAlternateSchemes || !Uri.CheckSchemeName(headerScheme))
{
ResetAndAbort(new ConnectionAbortedException(
CoreStrings.FormatHttp2StreamErrorSchemeMismatch(HttpRequestHeaders.HeaderScheme, Scheme)), Http2ErrorCode.PROTOCOL_ERROR);
CoreStrings.FormatHttp2StreamErrorSchemeMismatch(headerScheme, Scheme)), Http2ErrorCode.PROTOCOL_ERROR);
return false;
}

Expand All @@ -264,6 +265,7 @@ private bool TryValidatePseudoHeaders()
// :path (and query) - Required
// Must start with / except may be * for OPTIONS
var path = HttpRequestHeaders.HeaderPath.ToString();
HttpRequestHeaders.HeaderPath = default; // Suppress pseduo headers from the public headers collection.
RawTarget = path;

// OPTIONS - https://tools.ietf.org/html/rfc7540#section-8.1.2.3
Expand Down Expand Up @@ -301,6 +303,7 @@ private bool TryValidateMethod()
{
// :method
_methodText = HttpRequestHeaders.HeaderMethod.ToString();
HttpRequestHeaders.HeaderMethod = default; // Suppress pseduo headers from the public headers collection.
Method = HttpUtilities.GetKnownMethod(_methodText);

if (Method == HttpMethod.None)
Expand All @@ -327,6 +330,7 @@ private bool TryValidateAuthorityAndHost(out string hostText)
// Prefer this over Host

var authority = HttpRequestHeaders.HeaderAuthority;
HttpRequestHeaders.HeaderAuthority = default; // Suppress pseduo headers from the public headers collection.
var host = HttpRequestHeaders.HeaderHost;
if (!StringValues.IsNullOrEmpty(authority))
{
Expand Down
12 changes: 8 additions & 4 deletions src/Servers/Kestrel/Core/src/Internal/Http3/Http3Stream.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -787,12 +787,13 @@ private bool TryValidatePseudoHeaders()
// proxy or gateway can translate requests for non - HTTP schemes,
// enabling the use of HTTP to interact with non - HTTP services.
var headerScheme = HttpRequestHeaders.HeaderScheme.ToString();
HttpRequestHeaders.HeaderScheme = default; // Suppress pseduo headers from the public headers collection.
if (!ReferenceEquals(headerScheme, Scheme) &&
!string.Equals(headerScheme, Scheme, StringComparison.OrdinalIgnoreCase))
{
if (!ServerOptions.AllowAlternateSchemes || !Uri.CheckSchemeName(headerScheme))
{
var str = CoreStrings.FormatHttp3StreamErrorSchemeMismatch(RequestHeaders[HeaderNames.Scheme], Scheme);
var str = CoreStrings.FormatHttp3StreamErrorSchemeMismatch(headerScheme, Scheme);
Abort(new ConnectionAbortedException(str), Http3ErrorCode.ProtocolError);
return false;
}
Expand All @@ -802,7 +803,8 @@ private bool TryValidatePseudoHeaders()

// :path (and query) - Required
// Must start with / except may be * for OPTIONS
var path = RequestHeaders[HeaderNames.Path].ToString();
var path = HttpRequestHeaders.HeaderPath.ToString();
HttpRequestHeaders.HeaderPath = default; // Suppress pseduo headers from the public headers collection.
RawTarget = path;

// OPTIONS - https://tools.ietf.org/html/rfc7540#section-8.1.2.3
Expand Down Expand Up @@ -840,7 +842,8 @@ private bool TryValidatePseudoHeaders()
private bool TryValidateMethod()
{
// :method
_methodText = RequestHeaders[HeaderNames.Method].ToString();
_methodText = HttpRequestHeaders.HeaderMethod.ToString();
HttpRequestHeaders.HeaderMethod = default; // Suppress pseduo headers from the public headers collection.
Method = HttpUtilities.GetKnownMethod(_methodText);

if (Method == Http.HttpMethod.None)
Expand All @@ -866,7 +869,8 @@ private bool TryValidateAuthorityAndHost(out string hostText)
// :authority (optional)
// Prefer this over Host

var authority = RequestHeaders[HeaderNames.Authority];
var authority = HttpRequestHeaders.HeaderAuthority;
HttpRequestHeaders.HeaderAuthority = default; // Suppress pseduo headers from the public headers collection.
var host = HttpRequestHeaders.HeaderHost;
if (!StringValues.IsNullOrEmpty(authority))
{
Expand Down
9 changes: 8 additions & 1 deletion src/Servers/Kestrel/shared/KnownHeaders.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -843,7 +843,14 @@ internal partial class {loop.ClassName} : IHeaderDictionary
}}
set
{{
{header.SetBit()};
if (!StringValues.IsNullOrEmpty(value))
{{
{header.SetBit()};
}}
else
{{
{header.ClearBit()};
}}
_headers._{header.Identifier} = value; {(header.EnhancedSetter == false ? "" : $@"
_headers._raw{header.Identifier} = null;")}
}}")}
Expand Down
1 change: 1 addition & 0 deletions src/Servers/Kestrel/test/InMemory.FunctionalTests/Http2/Http2StreamTests.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -432,6 +432,7 @@ public async Task HEADERS_Received_SchemeMismatchAllowed_Processed(string scheme
await InitializeConnectionAsync(context =>
{
Assert.Equal(scheme, context.Request.Scheme);
Assert.False(context.Request.Headers.ContainsKey(HeaderNames.Scheme));
return Task.CompletedTask;
});

Expand Down
44 changes: 42 additions & 2 deletions src/Servers/Kestrel/test/InMemory.FunctionalTests/Http2/Http2TestBase.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -136,6 +136,7 @@ protected static IEnumerable<KeyValuePair<string, string>> ReadRateRequestHeader
protected readonly Dictionary<string, string> _receivedHeaders = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
protected readonly Dictionary<string, string> _receivedTrailers = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
protected readonly Dictionary<string, string> _decodedHeaders = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
protected readonly RequestFields _receivedRequestFields = new RequestFields();
protected readonly HashSet<int> _abortedStreamIds = new HashSet<int>();
protected readonly object _abortedStreamIdsLock = new object();
protected readonly TaskCompletionSource _closingStateReached = new TaskCompletionSource(TaskCreationOptions.RunContinuationsAsynchronously);
Expand Down Expand Up @@ -195,6 +196,10 @@ public Http2TestBase()

_readHeadersApplication = context =>
{
_receivedRequestFields.Method = context.Request.Method;
_receivedRequestFields.Scheme = context.Request.Scheme;
_receivedRequestFields.Path = context.Request.Path.Value;
_receivedRequestFields.RawTarget = context.Features.Get<IHttpRequestFeature>().RawTarget;
foreach (var header in context.Request.Headers)
{
_receivedHeaders[header.Key] = header.Value.ToString();
Expand All @@ -217,6 +222,10 @@ public Http2TestBase()
Assert.True(context.Request.SupportsTrailers(), "SupportsTrailers");
Assert.True(context.Request.CheckTrailersAvailable(), "SupportsTrailers");

_receivedRequestFields.Method = context.Request.Method;
_receivedRequestFields.Scheme = context.Request.Scheme;
_receivedRequestFields.Path = context.Request.Path.Value;
_receivedRequestFields.RawTarget = context.Features.Get<IHttpRequestFeature>().RawTarget;
foreach (var header in context.Request.Headers)
{
_receivedHeaders[header.Key] = header.Value.ToString();
Expand Down Expand Up @@ -350,20 +359,23 @@ public Http2TestBase()
_echoMethodNoBody = context =>
{
Assert.False(context.Request.CanHaveBody());
Assert.False(context.Request.Headers.ContainsKey(HeaderNames.Method));
context.Response.Headers["Method"] = context.Request.Method;

return Task.CompletedTask;
};

_echoHost = context =>
{
Assert.False(context.Request.Headers.ContainsKey(HeaderNames.Authority));
context.Response.Headers.Host = context.Request.Headers.Host;

return Task.CompletedTask;
};

_echoPath = context =>
{
Assert.False(context.Request.Headers.ContainsKey(HeaderNames.Path));
context.Response.Headers["path"] = context.Request.Path.ToString();
context.Response.Headers["rawtarget"] = context.Features.Get<IHttpRequestFeature>().RawTarget;

Expand Down Expand Up @@ -1240,8 +1252,28 @@ protected void VerifyDecodedRequestHeaders(IEnumerable<KeyValuePair<string, stri
{
foreach (var header in expectedHeaders)
{
Assert.True(_receivedHeaders.TryGetValue(header.Key, out var value), header.Key);
Assert.Equal(header.Value, value, ignoreCase: true);
if (header.Key == HeaderNames.Method)
{
Assert.Equal(header.Value, _receivedRequestFields.Method);
}
else if (header.Key == HeaderNames.Authority)
{
Assert.True(_receivedHeaders.TryGetValue(HeaderNames.Host, out var host), header.Key);
Assert.Equal(header.Value, host);
}
else if (header.Key == HeaderNames.Scheme)
{
Assert.Equal(header.Value, _receivedRequestFields.Scheme);
}
else if (header.Key == HeaderNames.Path)
{
Assert.Equal(header.Value, _receivedRequestFields.RawTarget);
}
else
{
Assert.True(_receivedHeaders.TryGetValue(header.Key, out var value), header.Key);
Assert.Equal(header.Value, value, ignoreCase: true);
}
}
}

Expand Down Expand Up @@ -1390,5 +1422,13 @@ public long GetResponseDrainDeadline(long ticks, MinDataRate minRate)
return _realTimeoutControl.GetResponseDrainDeadline(ticks, minRate);
}
}

public class RequestFields
{
public string Method { get; set; }
public string Scheme { get; set; }
public string Path { get; set; }
public string RawTarget { get; set; }
}
}
}