Re: Review Request 71664: SSL Wrapper: Implemented BIO for SSL socket wrapper.

[Joseph Wu <jo...@mesosphere.io>]

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Notes from an offline review session:


3rdparty/libprocess/src/ssl/socket_wrapper.cpp
Lines 213-221 (patched)
<https://reviews.apache.org/r/71664/#comment306399>

    Since this is a blocking call, consider not implementing it.
    
    In tests, `BIO_flush` seems to be used in the handshake code within OpenSSL.  Since we already have retry logic waiting on these futures asynchronously, a flush would negatively affect the thread, with no real benefit.



3rdparty/libprocess/src/ssl/socket_wrapper.cpp
Lines 254-275 (patched)
<https://reviews.apache.org/r/71664/#comment306415>

    An alternative implementation would involve this set of methods:
    https://www.openssl.org/docs/man1.1.1/man3/BIO_f_ssl.html
    
    This patch chain transforms the libprocess I/O into a BIO-flavoured object consumable by OpenSSL as a source/sink.
    
    A `BIO_f_ssl` would give us a different interface, where the OpenSSL library is a filter object used by libprocess instead.


- Joseph Wu


On Oct. 30, 2019, 6:29 p.m., Joseph Wu wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/71664/
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> 
> (Updated Oct. 30, 2019, 6:29 p.m.)
> 
> 
> Review request for mesos, Benno Evers, Benjamin Mahler, Greg Mann, and Till Toenshoff.
> 
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> Bugs: MESOS-10009
>     https://issues.apache.org/jira/browse/MESOS-10009
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> Repository: mesos
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> Description
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> 
> This implements the OpenSSL basic I/O abstraction based on the
> libprocess event loop.  This BIO wraps a socket and handles the
> reading/writing, using io::read and io::write.
> 
> This BIO can be passed into an SSL context to enable usage of
> SSL translation functions like SSL_read and SSL_write.
> 
> 
> Diffs
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>   3rdparty/libprocess/src/ssl/socket_wrapper.cpp PRE-CREATION 
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> Diff: https://reviews.apache.org/r/71664/diff/2/
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> Testing
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> cmake --build . --target process
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> A tiny bit of testing next patch.
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> 
> Thanks,
> 
> Joseph Wu
> 
>