linux-kernel - Re: [PATCH] modsign: provide option to automatically delete the key after modules were installed

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Date:	Fri, 23 Jan 2015 12:43:55 +0100
From:	Alexander Holler <holler@...oftware.de>
To:	Michal Marek <mmarek@...e.cz>, linux-kernel@...r.kernel.org
CC:	linux-kbuild@...r.kernel.org, David Howells <dhowells@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH] modsign: provide option to automatically delete the key
 after modules were installed

Am 23.01.2015 um 11:55 schrieb Michal Marek:
> On 2015-01-23 11:15, Alexander Holler wrote:
>> Am 23.01.2015 um 10:39 schrieb Alexander Holler:
>>> Am 23.01.2015 um 10:24 schrieb Michal Marek:
>>>
>>>>> +	@rm ./signing_key.priv
>>>>> +	@rm ./signing_key.x509
>>>>
>>>> Why do you need to delete the certificate?
>>>
>>> No special reason.
>>>
>>> I'm just not sure (and too lazy to look it up) if it might contain the
>>> private key too (like it's possible in pem files), so I've deleted it too.
>>
>> Or in other words, while .priv leads me to the educated guess that it
>> contains the private key, .x509 doesn't give me an obvious indication
>> what it contains.
>>
>> If someone assures me that .x509 doesn't contain the private key
>> necessary to sign the modules, I'll send a v2 of the patch.
>
> The .x509 file contains a certificate signed by the private key, but not
> the private key. With some scripting, it can be used to verify the
> module signatures.


Assuming that doesn't change (hopefully), I'll send v2 in a few minutes 
(it just compiles in order to test it). Thanks for assuring me that 
.x509 does not and will not contain the private key.

Regards,

Alexander Holler
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