Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757655Ab3CNMsa (ORCPT ); Thu, 14 Mar 2013 08:48:30 -0400 Received: from 173-166-109-252-newengland.hfc.comcastbusiness.net ([173.166.109.252]:56957 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750989Ab3CNMs3 (ORCPT ); Thu, 14 Mar 2013 08:48:29 -0400 Message-ID: <1363265300.4853.37.camel@i7.infradead.org> Subject: Re: [PATCH] X.509: Remove certificate date checks From: David Woodhouse To: David Howells Cc: rusty@rustcorp.com.au, torvalds@linux-foundation.org, keyrings@linux-nfs.org, Josh Boyer , linux-kernel@vger.kernel.org, stable@vger.kernel.org, Alexander Holler Date: Thu, 14 Mar 2013 12:48:20 +0000 In-Reply-To: <20130314123413.13286.62117.stgit@warthog.procyon.org.uk> References: <20130314123413.13286.62117.stgit@warthog.procyon.org.uk> Content-Type: multipart/signed; micalg="sha1"; protocol="application/x-pkcs7-signature"; boundary="=-+Gt+befi2jLRc0EDTBA4" X-Mailer: Evolution 3.6.3 (3.6.3-2.fc18) 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: 9804 Lines: 151 --=-+Gt+befi2jLRc0EDTBA4 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Thu, 2013-03-14 at 12:34 +0000, David Howells wrote: > Remove the certificate date checks that are performed when a certificate = is > parsed. There are two checks: a valid from and a valid to. The first ch= eck is > causing a lot of problems with system clocks that don't keep good time an= d the > second places an implicit expiry date upon the kernel when used for modul= e > signing, so do we really need them? While the date check is entirely bogus for the specific case of module signing, I don't think we necessarily ought to rip it out of our generic X.509 support entirely. Some use cases *might* want to check the dates, and should be permitted to do so. Just don't refuse to even *parse* the key outside its valid date range... :) --=20 David Woodhouse Open Source Technology Centre David.Woodhouse@intel.com Intel Corporation --=-+Gt+befi2jLRc0EDTBA4 Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIUbjCCBjQw ggQcoAMCAQICAR4wDQYJKoZIhvcNAQEFBQAwfTELMAkGA1UEBhMCSUwxFjAUBgNVBAoTDVN0YXJ0 Q29tIEx0ZC4xKzApBgNVBAsTIlNlY3VyZSBEaWdpdGFsIENlcnRpZmljYXRlIFNpZ25pbmcxKTAn BgNVBAMTIFN0YXJ0Q29tIENlcnRpZmljYXRpb24gQXV0aG9yaXR5MB4XDTA3MTAyNDIxMDE1NVoX DTE3MTAyNDIxMDE1NVowgYwxCzAJBgNVBAYTAklMMRYwFAYDVQQKEw1TdGFydENvbSBMdGQuMSsw KQYDVQQLEyJTZWN1cmUgRGlnaXRhbCBDZXJ0aWZpY2F0ZSBTaWduaW5nMTgwNgYDVQQDEy9TdGFy dENvbSBDbGFzcyAxIFByaW1hcnkgSW50ZXJtZWRpYXRlIENsaWVudCBDQTCCASIwDQYJKoZIhvcN AQEBBQADggEPADCCAQoCggEBAMcJg8zOLdgasSmkLhOrlr6KMoOMpohBllVHrdRvEg/q6r8jR+EK 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