Call to `openssl` causes Emacs to freeze

Call to `openssl` causes Emacs to freeze

[Alexis]

Hi all,

Context: manually-compiled Emacs 24.5 on Debian Jessie x86_64.

For a while i'd been facing the problem that, when i opened an 
HTML email (erk) in mu4e, Emacs would freeze; my only recourse was 
to terminate the Emacs process.

Today i worked out that a call to `openssl` is the source of the 
problem: installing the `gnutls-bin` package and modifying the 
value of the variable `tls-program` to only call `gnutls-cli` 
fixed the issue.

Modifying `tls-program` to add the "-no_ssl3" switch to the 
`openssl` invocation had not helped.

Of course, OpenSSL's internals are apparently a wretched hive of 
scum, so i'm wondering if anyone else has faced this problem? Is 
this a known issue?


Alexis.

Re: Call to `openssl` causes Emacs to freeze

[Jude DaShiell]

I think this explains why twittering-mode cannot create an auth key for 
twitter after username and password get entered.  This happened in 
earlier versions of emacs 24.x and I gave up on twittering-mode for that 
reason.

On Mon, 17 Aug 2015, Alexis wrote:

> Date: Sun, 16 Aug 2015 22:39:46
> From: Alexis <flexibeast@gmail.com>
> To: help-gnu-emacs <help-gnu-emacs@gnu.org>
> Subject: Call to `openssl` causes Emacs to freeze
> 
>
> Hi all,
>
> Context: manually-compiled Emacs 24.5 on Debian Jessie x86_64.
>
> For a while i'd been facing the problem that, when i opened an HTML email 
> (erk) in mu4e, Emacs would freeze; my only recourse was to terminate the 
> Emacs process.
>
> Today i worked out that a call to `openssl` is the source of the problem: 
> installing the `gnutls-bin` package and modifying the value of the variable 
> `tls-program` to only call `gnutls-cli` fixed the issue.
>
> Modifying `tls-program` to add the "-no_ssl3" switch to the `openssl` 
> invocation had not helped.
>
> Of course, OpenSSL's internals are apparently a wretched hive of scum, so i'm 
> wondering if anyone else has faced this problem? Is this a known issue?
>
>
> Alexis.
>
>

-- 

Re: Call to `openssl` causes Emacs to freeze

[tomas]

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On Mon, Aug 17, 2015 at 12:39:46PM +1000, Alexis wrote:
> 
> Hi all,
> 
> Context: manually-compiled Emacs 24.5 on Debian Jessie x86_64.
> 
> For a while i'd been facing the problem that, when i opened an HTML
> email (erk) in mu4e, Emacs would freeze; my only recourse was to
> terminate the Emacs process.
> 
> Today i worked out that a call to `openssl` is the source of the
> problem: installing the `gnutls-bin` package and modifying the value
> of the variable `tls-program` to only call `gnutls-cli` fixed the
> issue.

Only indirectly related, but I had similar experiences accessing
https things. Gnutls-cli failed in my case, my best bet was compiled-in
TLS support. So if you are compiling your Emacs yourself anyway, I'd
strongly recommend using that: resorting to an external program
(openssl or gnutls-bin) makes some things difficult for the application.

Regards
- -- tomás
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Re: Call to `openssl` causes Emacs to freeze

[Alexis]

tomas@tuxteam.de writes:

> Only indirectly related, but I had similar experiences accessing 
> https things. Gnutls-cli failed in my case, my best bet was 
> compiled-in TLS support. So if you are compiling your Emacs 
> yourself anyway, I'd strongly recommend using that: resorting to 
> an external program (openssl or gnutls-bin) makes some things 
> difficult for the application.

Thanks for the suggestion! i've just recompiled after having 
installed the `gnutls-dev` package - will see how that goes. :-)


Alexis.

Re: Call to `openssl` causes Emacs to freeze

[tomas]

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On Tue, Aug 18, 2015 at 10:11:17PM +1000, Alexis wrote:
> 
> tomas@tuxteam.de writes:
> 
> > [... try compiled-in TLS support]

> Thanks for the suggestion! i've just recompiled after having
> installed the `gnutls-dev` package - will see how that goes. :-)

You are welcome :-)

Let us know how it goes!

regards
- -- tomás
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Re: Call to `openssl` causes Emacs to freeze

[Alexis]

tomas@tuxteam.de writes:

>> Thanks for the suggestion! i've just recompiled after having 
>> installed the `gnutls-dev` package - will see how that 
>> goes. :-)
>
> You are welcome :-)
>
> Let us know how it goes!

Follow-up: i've been using the recompiled-with-gnutls-support 
version of Emacs for a few weeks now, and am yet to experience the 
sort of freezes i was experiencing before. :-)


Alexis.

Re: Call to `openssl` causes Emacs to freeze

[tomas]

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On Tue, Sep 08, 2015 at 08:25:51PM +1000, Alexis wrote:
> 
> tomas@tuxteam.de writes:
> 
> >>Thanks for the suggestion! i've just recompiled after having
> >>installed the `gnutls-dev` package - will see how that goes. :-)
> >
> >You are welcome :-)
> >
> >Let us know how it goes!
> 
> Follow-up: i've been using the recompiled-with-gnutls-support
> version of Emacs for a few weeks now, and am yet to experience the
> sort of freezes i was experiencing before. :-)

Thank you for the feedback. Yes, this confirms my experience too.

Regards
- -- tomás
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