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

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Message-ID: <54C22891.6070506@suse.cz>
Date:	Fri, 23 Jan 2015 11:55:13 +0100
From:	Michal Marek <mmarek@...e.cz>
To:	Alexander Holler <holler@...oftware.de>,
	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

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.

Michal

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