linux-kernel - Re: Linux 4.3-rc1 build error on CentOS 5.11 "scripts/sign-file.c:23:25: fatal error: openssl/cms.h: No such file or directory"

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Date:	Fri, 25 Sep 2015 18:43:31 -0700
From:	Vinson Lee <vlee@...pensource.com>
To:	David Howells <dhowells@...hat.com>
Cc:	David Woodhouse <David.Woodhouse@...el.com>,
	"Luis R. Rodriguez" <mcgrof@...e.com>,
	Mimi Zohar <zohar@...ux.vnet.ibm.com>,
	Marcel Holtmann <marcel@...tmann.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: Linux 4.3-rc1 build error on CentOS 5.11 "scripts/sign-file.c:23:25:
 fatal error: openssl/cms.h: No such file or directory"

On Fri, Sep 25, 2015 at 7:24 AM, David Howells <dhowells@...hat.com> wrote:
> Here's my patch with the changes squashed into it for reference.
>
> David
> ---
> commit 81852354cf81402ae69fda4d67138accab2702d5
> Author: David Howells <dhowells@...hat.com>
> Date:   Thu Sep 24 14:06:02 2015 +0100
>
>     MODSIGN: Change from CMS to PKCS#7 signing if the openssl is too old
>
>     The sign-file.c program actually uses CMS rather than PKCS#7 to sign a file
>     since that allows the target X.509 certificate to be specified by
>     subjectKeyId rather than by issuer + serialNumber.
>
>     However, older versions of the OpenSSL crypto library (such as may be found
>     in CentOS 5.11) don't support CMS.  Assume everything prior to
>     OpenSSL-1.0.0 doesn't support CMS and switch to using PKCS#7 in that case.
>
>     Further, the pre-1.0.0 OpenSSL only supports PKCS#7 signing with SHA1, so
>     give an error from the sign-file script if the caller requests anything
>     other than SHA1.
>
>     The compiler gives the following error with an OpenSSL crypto library
>     that's too old:
>
>       HOSTCC  scripts/sign-file
>     scripts/sign-file.c:23:25: fatal error: openssl/cms.h: No such file or directory
>      #include <openssl/cms.h>
>
>     Reported-by: Vinson Lee <vlee@...pensource.com>
>     Signed-off-by: David Howells <dhowells@...hat.com>
>     Acked-by: David Woodhouse <David.Woodhouse@...el.com>
>

This squashed patch also builds for me on CentOS 5.11.

Linux 4.2-rc2 plus this patch booted up without issue and it appears
this feature is available.

$ dmesg | grep -i 'x.*509'
[    1.888412] Asymmetric key parser 'x509' registered
[    3.485152] Loading compiled-in X.509 certificates
[    3.490659] Loaded X.509 cert 'Build time autogenerated kernel key:
ea8ef2f666280e4d429a8ff8a2056069bbb55979'

Vinson
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