Re: Add CURLOPT_SSL_PTR_FUNCTION callback?

> On Jul 3, 2020, at 9:54 AM, Daniel Stenberg <daniel_at_haxx.se> wrote:
>
> On Thu, 2 Jul 2020, Felipe Gasper via curl-library wrote:
>
>> I’d like libcurl’s API to expose a callback that fires immediately after the SSL object is created. This will allow alterations to the request as per the SSL parameters.
>>
>> I’m happy to do the work. Is this an enhancement that would interest the maintainer(s)?
>
> How about instead making sure CURLINFO_TLS_SSL_PTR can be extracted by the time the CURLOPT_SSL_CTX_FUNCTION is called?
>
> Feels like a smaller change with roughly the same end result...

The documentation for CURLOPT_SSL_CTX_FUNCTION states that that callback fires “just before the initialization of an SSL connection”. To change that so that the callback fires after the SSL and CTX are both available would indeed facilitate the usage I envision, but it would seem to be a breaking change, both in terms of when the callback fires and of the input signature that the callback would need to implement:

1) Instead of firing before the SSL initialization it would need to fire after it.

2) Instead of passing in the SSL_CTX it would need to pass in both, or just the SSL (from which the CTX can be derived).

Or is there another way to approach this?

-FG
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Received on 2020-07-03