From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by mx.groups.io with SMTP id smtpd.web12.1990.1571137607492455014 for ; Tue, 15 Oct 2019 04:06:48 -0700 Authentication-Results: mx.groups.io; dkim=pass header.i=@infradead.org header.s=merlin.20170209 header.b=256ICAxx; spf=none, err=permanent DNS error (domain: merlin.srs.infradead.org, ip: 205.233.59.134, mailfrom: batv+84b71c23215cbad1c5a0+5896+infradead.org+dwmw2@merlin.srs.infradead.org) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.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=K31L/7EpqC9DBkYkgWFOPkj+4hNMlhaGQQbp55REObw=; b=256ICAxxeoU3ZO/uJo/eb2B+R B0WwBX9c1g8/fEaCqoze6sKXB7TwJXs4+San7THNQD/dgURfam7R85fpR8x8bwago+nq0G94Qslzo LeJnKahyom78OjAXyjNBZVFCwZwB3w7sx3HxYqceVgWhCBouF8T4oJgQkRGlQfn4rB2GmU0aKG9a2 LqSv3WuEe4nklSBrlFHWhFwGOwIKX0eNHwu9/q0ltdCL+1k8186nq6+toX+4kayIeubfzHPFe7McO Q2AlonrEnonvobYWWYBUXhabss91HcgN0cua+vgZKUw281w97ZgTbMwCrweDudfxrs3bMzcgEQ/36 ow0VI4muQ==; Received: from 54-240-197-236.amazon.com ([54.240.197.236] helo=iad7-dhcp-95-133-84.iad7.amazon.com) by merlin.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1iKKf6-0002Jx-DE; Tue, 15 Oct 2019 11:06:45 +0000 Message-ID: <1e1731be80194dfbf99cf24efa4ac79c2d5a6c3c.camel@infradead.org> Subject: Re: [edk2-devel] [PATCH v1 0/4] Support HTTPS HostName validation feature(CVE-2019-14553) From: "David Woodhouse" To: Laszlo Ersek , "Wu, Jiaxin" , "devel@edk2.groups.io" , "Wang, Jian J" , Bret Barkelew Cc: Richard Levitte Date: Tue, 15 Oct 2019 12:06:42 +0100 In-Reply-To: <1400b3e6c04f3422a1ba0bef844664aa84c6ff33.camel@infradead.org> References: <20190927034441.3096-1-Jiaxin.wu@intel.com> <69774fe6-ea00-44b9-5468-c092dea6cd36@redhat.com> <8106467c9f4132c831d0aa604e897fe9d4dda12a.camel@infradead.org> <895558F6EA4E3B41AC93A00D163B727416F5D921@SHSMSX107.ccr.corp.intel.com> <777053db79600eb90a19945700293d14f4978344.camel@infradead.org> <6bb5d2f6-ec6f-1766-e19b-03fd45c1bc12@redhat.com> <9A4966EE-76CD-465C-A6CA-70DD9E38D834@infradead.org> <850a81a8-2cdc-0708-4ff7-db9825fdaedc@redhat.com> <23699ae3-10c2-037c-b3f5-ac8f5bea1fb7@redhat.com> <895558F6EA4E3B41AC93A00D163B727416F7E4AB@SHSMSX107.ccr.corp.intel.com> <6939ba4e-6c77-0769-4ac2-c3ba1ea9a0b7@redhat.com> <44468659be80e9bf1886e7b6f8f3aa77044b5fd6.camel@infradead.org> <5bbadb29-36f2-1054-fd41-5577d59c9290@redhat.com> <5c33b6c2-c8b0-aa64-a85f-06bdc3c69843@redhat.com> <1400b3e6c04f3422a1ba0bef844664aa84c6ff33.camel@infradead.org> X-Mailer: Evolution 3.28.5-0ubuntu0.18.04.1 Mime-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by merlin.infradead.org. See http://www.infradead.org/rpr.html X-Groupsio-MsgNum: 49004 Content-Type: multipart/signed; micalg="sha-256"; protocol="application/x-pkcs7-signature"; boundary="=-Zr/gXKW7o+bbtyikL13o" --=-Zr/gXKW7o+bbtyikL13o Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Tue, 2019-10-15 at 12:03 +0100, David Woodhouse wrote: >=20 > Something like this... and instead of calling SSL_set1_host(ssl, host) > your own code now has to call > SSL_set_ex_data(ssl, ssl_target_idx, strdup(host)); Here's how I tested that in the OpenSSL tree in userspace, FWIW... diff --git a/demos/bio/sconnect.c b/demos/bio/sconnect.c index 7e46bf0ad8..1fd2829a79 100644 --- a/demos/bio/sconnect.c +++ b/demos/bio/sconnect.c @@ -25,11 +25,40 @@ #define HOSTPORT "localhost:4433" #define CAFILE "root.pem" =20 +static int ssl_target_idx; + +void ssl_target_free(void *parent, void *ptr, CRYPTO_EX_DATA *ad, + int idx, long argl, void *argp) +{ + printf("Freeing %s\n", ptr); + free(ptr); +} + +int ssl_target_dup(CRYPTO_EX_DATA *to, const CRYPTO_EX_DATA *from, + void *from_d, int idx, long argl, void *argp) +{ + /* strdup it */ + return 0; +} + +int app_verify_callback(X509_STORE_CTX *ctx, void *dummy) +{ + SSL *ssl =3D X509_STORE_CTX_get_ex_data(ctx, SSL_get_ex_data_X509_STORE_C= TX_idx()); + char *hostname =3D SSL_get_ex_data(ssl, ssl_target_idx); + X509_VERIFY_PARAM *vpm =3D X509_STORE_CTX_get0_param(ctx); + + printf("Setting %s\n", hostname); + if (hostname && !X509_VERIFY_PARAM_set1_ip_asc(vpm, hostname)) + X509_VERIFY_PARAM_set1_host(vpm, hostname, 0); + + return X509_verify_cert(ctx); +} + int main(int argc, char *argv[]) { const char *hostport =3D HOSTPORT; const char *CAfile =3D CAFILE; - char *hostname; + const char *hostname; char *cp; BIO *out =3D NULL; char buf[1024 * 10], *p; @@ -43,10 +72,6 @@ int main(int argc, char *argv[]) if (argc > 2) CAfile =3D argv[2]; =20 - hostname =3D OPENSSL_strdup(hostport); - if ((cp =3D strchr(hostname, ':')) !=3D NULL) - *cp =3D 0; - #ifdef WATT32 dbug_init(); sock_init(); @@ -54,6 +79,8 @@ int main(int argc, char *argv[]) =20 ssl_ctx =3D SSL_CTX_new(TLS_client_method()); =20 + SSL_CTX_set_cert_verify_callback(ssl_ctx, app_verify_callback, NULL); + /* Enable trust chain verification */ SSL_CTX_set_verify(ssl_ctx, SSL_VERIFY_PEER, NULL); SSL_CTX_load_verify_locations(ssl_ctx, CAfile, NULL); @@ -62,9 +89,6 @@ int main(int argc, char *argv[]) ssl =3D SSL_new(ssl_ctx); SSL_set_connect_state(ssl); =20 - /* Enable peername verification */ - if (SSL_set1_host(ssl, hostname) <=3D 0) - goto err; =20 /* Use it inside an SSL BIO */ ssl_bio =3D BIO_new(BIO_f_ssl()); @@ -73,6 +97,13 @@ int main(int argc, char *argv[]) /* Lets use a connect BIO under the SSL BIO */ out =3D BIO_new(BIO_s_connect()); BIO_set_conn_hostname(out, hostport); + + /* The BIO has parsed the host:port and even IPv6 literals in [] */ + hostname =3D BIO_get_conn_hostname(out); + + if (hostname) + SSL_set_ex_data(ssl, ssl_target_idx, strdup(hostname)); + BIO_set_nbio(out, 1); out =3D BIO_push(ssl_bio, out); =20 --=-Zr/gXKW7o+bbtyikL13o Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCCECow ggUcMIIEBKADAgECAhEA4rtJSHkq7AnpxKUY8ZlYZjANBgkqhkiG9w0BAQsFADCBlzELMAkGA1UE BhMCR0IxGzAZBgNVBAgTEkdyZWF0ZXIgTWFuY2hlc3RlcjEQMA4GA1UEBxMHU2FsZm9yZDEaMBgG A1UEChMRQ09NT0RPIENBIExpbWl0ZWQxPTA7BgNVBAMTNENPTU9ETyBSU0EgQ2xpZW50IEF1dGhl bnRpY2F0aW9uIGFuZCBTZWN1cmUgRW1haWwgQ0EwHhcNMTkwMTAyMDAwMDAwWhcNMjIwMTAxMjM1 OTU5WjAkMSIwIAYJKoZIhvcNAQkBFhNkd213MkBpbmZyYWRlYWQub3JnMIIBIjANBgkqhkiG9w0B AQEFAAOCAQ8AMIIBCgKCAQEAsv3wObLTCbUA7GJqKj9vHGf+Fa+tpkO+ZRVve9EpNsMsfXhvFpb8 RgL8vD+L133wK6csYoDU7zKiAo92FMUWaY1Hy6HqvVr9oevfTV3xhB5rQO1RHJoAfkvhy+wpjo7Q cXuzkOpibq2YurVStHAiGqAOMGMXhcVGqPuGhcVcVzVUjsvEzAV9Po9K2rpZ52FE4rDkpDK1pBK+ 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