From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by mx.groups.io with SMTP id smtpd.web12.3722.1571223686689941456 for ; Wed, 16 Oct 2019 04:01:26 -0700 Authentication-Results: mx.groups.io; dkim=pass header.i=@infradead.org header.s=bombadil.20170209 header.b=Com8/Ot1; spf=none, err=permanent DNS error (domain: bombadil.srs.infradead.org, ip: 198.137.202.133, mailfrom: batv+26844a6b5c1f2977c957+5897+infradead.org+dwmw2@bombadil.srs.infradead.org) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Mime-Version:Content-Type:References: In-Reply-To:Date:Cc:To:From:Subject:Message-ID:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=n5DFNrQc+q1WiHCO3CuO1RobTAUk+S4q9VK3xQ+LnY8=; b=Com8/Ot13JMuO08jqx6J0rGe6 r20jSiHYsLkQoSBg5Oa35XPaOHd+LwVtIz+kFQrZimqgSnIIUpOQq48izLFhMjzaqmDxl8Kc65sMn or+z9JMW+dlFWoi6kzkEkIdn8lH1xk19dvXgJRBxPLKHQhkZk1eKkZ+xHdFFGo0oEUeiQb1taCa7A 4LdeuNGGGlleMHq66uuXzFQk8ORx+xEApBRkUtfR95iNELSvwDOvj5ibvxd9zQ5fOQVHKTEB1eXNq u7LmEKhJVSaKKN9CuaQ/xrAZY81Ia4l51q0vTF9/3SqkuH0/6q16K24nsRQeF+fk2CGMy1NV+E4Ks LsLIWIO0Q==; Received: from [54.239.6.185] (helo=freeip.amazon.com) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1iKh3T-0003Bd-Q7; Wed, 16 Oct 2019 11:01:24 +0000 Message-ID: Subject: Re: [edk2-devel] [RFC v1 5/4] CryptoPkg/TlsLib: accept peer certs via both DNS names and IP addresses From: "David Woodhouse" To: devel@edk2.groups.io, lersek@redhat.com Cc: Bret Barkelew , Jian J Wang , Jiaxin Wu , Richard Levitte , Sivaraman Nainar Date: Wed, 16 Oct 2019 12:01:20 +0100 In-Reply-To: <20191015230839.27708-1-lersek@redhat.com> References: <20190927034441.3096-1-Jiaxin.wu@intel.com> <20191015230839.27708-1-lersek@redhat.com> X-Mailer: Evolution 3.28.5-0ubuntu0.18.04.1 Mime-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html X-Groupsio-MsgNum: 49088 Content-Type: multipart/signed; micalg="sha-256"; protocol="application/x-pkcs7-signature"; boundary="=-+UaPvIwoUA4YKPo8jLZW" --=-+UaPvIwoUA4YKPo8jLZW Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Wed, 2019-10-16 at 01:08 +0200, Laszlo Ersek wrote: > Notes: > Unfortunately, there are two problems with this patch: > =20 > (1) X509_VERIFY_PARAM_set1_ip_asc() does not accept IPv4 addresses in > dot-decimal notation (unless I messed up the code). My log file > contains: > =20 > > TlsDxe:TlsCertVerify: verifying peer certificate with DNS hostname = "192.168.124.2" > > TlsDxe:TlsCertVerify: peer certificate accepted That's odd; X509_VERIFY_PARAM_set1_ip_asc() shouldn't have failed on that string. I recommend staring very hard at the implementation of ipv4_from_asc() in openssl/crypto/x509/v3_utl.c. Especially the 'scanf' part. This one's going to bite you even when ditch my overly complex set of callbacks and ex_data, and just use SSL_get0_param() sensibly. > (2) X509_VERIFY_PARAM_set1_ip_asc() does accept IPv6 addresses. Howev= er, > in that case, the server certificate that I had generated with > "genkey" (where I entered the IPv6 address in the Common Name fie= ld) > is rejected: > =20 > > TlsDxe:TlsCertVerify: verifying peer certificate with numerical IP = address "fd33:eb1b:9b36::2" > > TlsDxe:TlsCertVerify: peer certificate rejected > > TlsDoHandshake SSL_HANDSHAKE_ERROR State=3D0x4 SSL_ERROR_SSL > > TlsDoHandshake ERROR 0x1416F086=3DL14:F16F:R86 > =20 > If I do not apply the present patch on top of Jiaxin's v1 4/4 (at > ), > then the certificate is accepted fine. As I believe you have already concluded, this is correct behaviour. That certificate is bogus, because your 'genkey' tool is not behaving correctly (qv) and should have produced a cert with an iPAddress in its SAN. 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