"Kyle J. McKay" <[email protected]> writes:

> According to the cURL documentation for the CURLOPT_USE_SSL option,
> it is only used with plain text protocols that get upgraded to SSL
> using the STARTTLS command.
>
> The server.use_ssl variable is only set when we are using a protocol
> that is already SSL/TLS (i.e. imaps), so setting CURLOPT_USE_SSL
> when the server.use_ssl variable is set has no effect whatsoever.
>
> Instead, set CURLOPT_USE_SSL to CURLUSESSL_TRY when the server.use_ssl
> variable is NOT set so that cURL will attempt to upgrade the plain
> text connection to SSL/TLS using STARTTLS in that case.
>
> This much more closely matches the behavior of the non-cURL code path.
>
> Signed-off-by: Kyle J. McKay <[email protected]>
> ---

It sounds sensible from the description of the approach but I'd
prefer independent opinion to sanity-check me.  Will queue while
waiting for others to speak up.

Thanks.

>
> *** PATCH IS AGAINST NEXT ***
>
> In particular, this patch requires br/imap-send-via-libcurl
>
>
>  imap-send.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/imap-send.c b/imap-send.c
> index 4dfe4c25..5251b750 100644
> --- a/imap-send.c
> +++ b/imap-send.c
> @@ -1421,8 +1421,8 @@ static CURL *setup_curl(struct imap_server_conf *srvc)
>               strbuf_release(&auth);
>       }
>  
> -     if (server.use_ssl)
> -             curl_easy_setopt(curl, CURLOPT_USE_SSL, (long)CURLUSESSL_ALL);
> +     if (!server.use_ssl)
> +             curl_easy_setopt(curl, CURLOPT_USE_SSL, (long)CURLUSESSL_TRY);
>  
>       curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, server.ssl_verify);
>       curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, server.ssl_verify);
--
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