Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934277AbbHLJuu (ORCPT ); Wed, 12 Aug 2015 05:50:50 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:51419 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932082AbbHLJus (ORCPT ); Wed, 12 Aug 2015 05:50:48 -0400 Message-ID: <1439373041.3100.64.camel@infradead.org> Subject: Re: [GIT PULL] MODSIGN: Use PKCS#7 for module signatures [ver #7a] From: David Woodhouse To: James Morris Cc: David Howells , mcgrof@gmail.com, zohar@linux.vnet.ibm.com, linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org Date: Wed, 12 Aug 2015 10:50:41 +0100 In-Reply-To: References: <15181.1439323425@warthog.procyon.org.uk> <1439363265.3100.30.camel@infradead.org> <1439370753.3100.58.camel@infradead.org> Content-Type: multipart/signed; micalg="sha-1"; protocol="application/x-pkcs7-signature"; boundary="=-9Zc5tJY17v+7Cg/hN/Ei" X-Mailer: Evolution 3.16.4 (3.16.4-2.fc22) Mime-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 10552 Lines: 190 --=-9Zc5tJY17v+7Cg/hN/Ei Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Wed, 2015-08-12 at 19:27 +1000, James Morris wrote: >=20 > Yep: >=20 > # CONFIG_MODULE_SIG_SHA512 is not set > CONFIG_MODULE_SIG_HASH=3D"sha1" > CONFIG_MODULE_SIG_KEY=3D"signing_key.pem" > # CONFIG_MODULE_COMPRESS is not set Can I have the full config please? Not that I understand how anything else would really make much difference. > >=20 > > At the very end of kernel/Makefile, in the rule for=20 > signing_key.x509, > > please could you add an 'echo $(X509_DEP)' before the call to > > extract_certs? That ought to be correctly depending on the > > signing_key.pem file. >=20 > $ make > CHK include/config/kernel.release > CHK include/generated/uapi/linux/version.h > CHK include/generated/utsrelease.h > CHK include/generated/bounds.h > CHK include/generated/timeconst.h > CHK include/generated/asm-offsets.h > CALL scripts/checksyscalls.sh > CHK include/generated/compile.h > echo=20 >=20 > EXTRACT_CERTS signing_key.pem >=20 > i.e. nothing. Odd. What are $(MODULE_SIG_KEY_FILENAME) and $(MODULE_SIG_KEY_SRCPREFIX) ? I'm going to have to make another pot of coffee if I'm going to debug the config_filename thing today... :) I'm scared to start thinking this way but... what version of 'make' are you using? If your precise .config doesn't help, is there any chance I can log into an affected box to poke at it? I've also been testing David's tree (commit f81977b46 precisely), so perhaps I should also try *precisely* the merged tree you're looking at. Again, not that I can imagine anything that would make this difference. > >=20 > > There's magic here to work out the precise dependency, since it=20 > might > > be a filename relative to either the build tree or the source tree. > > I'll take another look and work out how it copes in the case where=20 > the > > file doesn't exist yet... is this an out-of-tree build? > >=20 >=20 > Nope, but try a make mrproper first (as I have) and see if you get=20 > the same result. I've been testing that, both in-tree and out-of-tree. I can't make it *fail* to set X509_DEP and thus depend correctly on the signing_key.pem file. --=20 David Woodhouse Open Source Technology Centre David.Woodhouse@intel.com Intel Corporation --=-9Zc5tJY17v+7Cg/hN/Ei Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIISjjCCBicw ggUPoAMCAQICAw3vNzANBgkqhkiG9w0BAQUFADCBjDELMAkGA1UEBhMCSUwxFjAUBgNVBAoTDVN0 YXJ0Q29tIEx0ZC4xKzApBgNVBAsTIlNlY3VyZSBEaWdpdGFsIENlcnRpZmljYXRlIFNpZ25pbmcx ODA2BgNVBAMTL1N0YXJ0Q29tIENsYXNzIDEgUHJpbWFyeSBJbnRlcm1lZGlhdGUgQ2xpZW50IENB MB4XDTE1MDUwNTA5NDM0MVoXDTE2MDUwNTA5NTMzNlowQjEcMBoGA1UEAwwTZHdtdzJAaW5mcmFk ZWFkLm9yZzEiMCAGCSqGSIb3DQEJARYTZHdtdzJAaW5mcmFkZWFkLm9yZzCCASIwDQYJKoZIhvcN AQEBBQADggEPADCCAQoCggEBAMkbm9kPbx1j/X4RVyf/pPKSYwelcco69TvnQQbKM8m8xkWjXJI1 jpJ1jMaGUZGFToINMSZi7lZawUozudWbXSKy1SikENSTJHffsdRAIlsp+hR8vWvjsKUry6sEdqPG 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