correct way to anticipate decryption failures

correct way to anticipate decryption failures

[Rasmus]

Hi,

What is the correct way to handle decryption errors when using
auth-source?  I have something like,

    (auth-source-search :host "worldwide.net"
                        :user "rasmus"
                        :max 1 :require '(:user :secret))

This throws a decryption error when I haven't plugged in my (physical)
security token.

Depending on the arguments, sometimes this is called at init time causing
my daemon window to vanish, which is sort of annoying.

Should I ignore-errors or is there a better way to test if I'm currently
able to decrypt .authinfo.gpg?  Could I re-throw the warning without it
being an error?

Thanks,
Rasmus

-- 
ツ

Re: correct way to anticipate decryption failures

[John Mastro]

Rasmus <rasmus@gmx.us> wrote:
> What is the correct way to handle decryption errors when using
> auth-source?  I have something like,
>
>     (auth-source-search :host "worldwide.net"
>                         :user "rasmus"
>                         :max 1 :require '(:user :secret))
>
> This throws a decryption error when I haven't plugged in my (physical)
> security token.
>
> Depending on the arguments, sometimes this is called at init time causing
> my daemon window to vanish, which is sort of annoying.
>
> Should I ignore-errors or is there a better way to test if I'm currently
> able to decrypt .authinfo.gpg?  Could I re-throw the warning without it
> being an error?

You can probably use `with-demoted-errors'. Something like:

    (with-demoted-errors "Auth source error: %s"
      (auth-source-search :host "worldwide.net"
                          :user "rasmus"
                          :max 1 :require '(:user :secret)))

It catches the error and simply prints the message.

-- 
john

Re: correct way to anticipate decryption failures

[Rasmus]

John Mastro <john.b.mastro@gmail.com> writes:

> Rasmus <rasmus@gmx.us> wrote:
>> What is the correct way to handle decryption errors when using
>> auth-source?  I have something like,
>
>>
>>     (auth-source-search :host "worldwide.net"
>>                         :user "rasmus"
>>                         :max 1 :require '(:user :secret))
>>
>> This throws a decryption error when I haven't plugged in my (physical)
>> security token.
>>
>> Depending on the arguments, sometimes this is called at init time causing
>> my daemon window to vanish, which is sort of annoying.
>>
>> Should I ignore-errors or is there a better way to test if I'm currently
>> able to decrypt .authinfo.gpg?  Could I re-throw the warning without it
>> being an error?
>
> You can probably use `with-demoted-errors'. Something like:
>
>     (with-demoted-errors "Auth source error: %s"
>       (auth-source-search :host "worldwide.net"
>                           :user "rasmus"
>                           :max 1 :require '(:user :secret)))

Indeed, this works nicely,

    emacs -q --eval "(progn (require 'auth-source) (with-demoted-errors \"Auth source error: %s\" (auth-source-search :host \"worldwide.net\" :user \"rasmus\" :max 1 :require '(:user :secret))))"

Thanks!

Rasmus

-- 
It was you, Jezebel, it was you