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[release/7.0] Ensure free buffer space when reading TLS messages #83574

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merged 4 commits into from
Apr 3, 2023
Merged

[release/7.0] Ensure free buffer space when reading TLS messages #83574

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9782377
Ensure free buffer space when reading TLS messages
rzikm Mar 15, 2023
9ac03e7
Move buffer expansion outside of the loop to prevent unbounded grow
rzikm Mar 16, 2023
08ea2e4
Fix failing tests
rzikm Mar 16, 2023
1026dd2
Remove unwanted changes
rzikm Mar 21, 2023
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10 changes: 9 additions & 1 deletion src/libraries/System.Net.Security/src/System/Net/Security/SslStream.IO.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -684,10 +684,18 @@ private async ValueTask<int> EnsureFullTlsFrameAsync<TIOAdapter>(CancellationTok
return frameSize;
}

if (frameSize < int.MaxValue)
if (frameSize != int.MaxValue)
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Why is it needed? Looks like semantically it is the same. Only MaxValue can be "not <".

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Not needed, it was part of stylistic change to make it evident that int.MaxValue is a special value ("unknown size"). I can remove it from the backport.

{
// make sure we have space for the whole frame
_buffer.EnsureAvailableSpace(frameSize - _buffer.EncryptedLength);
}
else
{
// move existing data to the beginning of the buffer (they will
// be couple of bytes only, otherwise we would have entire
// header and know exact size)
_buffer.EnsureAvailableSpace(_buffer.Capacity - _buffer.EncryptedLength);
}

while (_buffer.EncryptedLength < frameSize)
{
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