[openssl-users] Acessing a proxy with OpenSSL

[Bernhard Fröhlich]

Am 28.01.2016 um 12:02 schrieb Marcos Bontempo:
> Hello,
>
> I'm using this example to make a SSL connection: 
> http://fm4dd.com/openssl/sslconnect.htm.
> Now I want to also acess a HTTPS proxy. Is there a way to acess a 
> HTTPS proxy with the OpenSSL library?
>
> Any tip will be very helpful,
> Thanks.

See http://wiki.squid-cache.org/Features/HTTPS and 
http://tools.ietf.org/rfc/rfc2817.

AFAIK OpenSSL does not provide specific support for SSL via proxy, but 
you can set up a SSL connection using the CONNECT request to the proxy.

Using a proxy for SSL connection does not make sense if you want to take 
advantage of a proxy's caching feature, since these CONNECT requests 
cannot be cached. This is by design.

Using a proxy for SSL can be useful if you want to avoid NAT, or want to 
log, or filter, the connection targets.

Hope this helps,
Ted
;)

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