public inbox for devel@edk2.groups.io
 help / color / mirror / Atom feed
From: "David Woodhouse" <dwmw2@infradead.org>
To: Laszlo Ersek <lersek@redhat.com>,
	"Wu, Jiaxin" <jiaxin.wu@intel.com>,
	 "devel@edk2.groups.io" <devel@edk2.groups.io>,
	"Wang, Jian J" <jian.j.wang@intel.com>,
	Bret Barkelew <Bret.Barkelew@microsoft.com>
Cc: Richard Levitte <levitte@openssl.org>
Subject: Re: [edk2-devel] [PATCH v1 0/4] Support HTTPS HostName validation feature(CVE-2019-14553)
Date: Tue, 15 Oct 2019 12:06:42 +0100	[thread overview]
Message-ID: <1e1731be80194dfbf99cf24efa4ac79c2d5a6c3c.camel@infradead.org> (raw)
In-Reply-To: <1400b3e6c04f3422a1ba0bef844664aa84c6ff33.camel@infradead.org>

[-- Attachment #1: Type: text/plain, Size: 2987 bytes --]

On Tue, 2019-10-15 at 12:03 +0100, David Woodhouse wrote:
> 
> 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"
 
+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 = X509_STORE_CTX_get_ex_data(ctx, SSL_get_ex_data_X509_STORE_CTX_idx());
+	char *hostname = SSL_get_ex_data(ssl, ssl_target_idx);
+	X509_VERIFY_PARAM *vpm = 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 = HOSTPORT;
     const char *CAfile = CAFILE;
-    char *hostname;
+    const char *hostname;
     char *cp;
     BIO *out = NULL;
     char buf[1024 * 10], *p;
@@ -43,10 +72,6 @@ int main(int argc, char *argv[])
     if (argc > 2)
         CAfile = argv[2];
 
-    hostname = OPENSSL_strdup(hostport);
-    if ((cp = strchr(hostname, ':')) != NULL)
-        *cp = 0;
-
 #ifdef WATT32
     dbug_init();
     sock_init();
@@ -54,6 +79,8 @@ int main(int argc, char *argv[])
 
     ssl_ctx = SSL_CTX_new(TLS_client_method());
 
+    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 = SSL_new(ssl_ctx);
     SSL_set_connect_state(ssl);
 
-    /* Enable peername verification */
-    if (SSL_set1_host(ssl, hostname) <= 0)
-        goto err;
 
     /* Use it inside an SSL BIO */
     ssl_bio = 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 = BIO_new(BIO_s_connect());
     BIO_set_conn_hostname(out, hostport);
+
+    /* The BIO has parsed the host:port and even IPv6 literals in [] */
+    hostname = BIO_get_conn_hostname(out);
+
+    if (hostname)
+	    SSL_set_ex_data(ssl, ssl_target_idx, strdup(hostname));
+
     BIO_set_nbio(out, 1);
     out = BIO_push(ssl_bio, out);
 

[-- Attachment #2: smime.p7s --]
[-- Type: application/x-pkcs7-signature, Size: 5174 bytes --]

  reply	other threads:[~2019-10-15 11:06 UTC|newest]

Thread overview: 61+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-27  3:44 [PATCH v1 0/4] Support HTTPS HostName validation feature(CVE-2019-14553) Wu, Jiaxin
2019-09-27  3:44 ` [PATCH v1 1/4] MdePkg/Include/Protocol/Tls.h: Add the data type of EfiTlsVerifyHost(CVE-2019-14553) Wu, Jiaxin
2019-09-27  3:44 ` [PATCH v1 2/4] CryptoPkg/TlsLib: Add the new API "TlsSetVerifyHost"(CVE-2019-14553) Wu, Jiaxin
2019-09-27  3:44 ` [PATCH v1 3/4] NetworkPkg/TlsDxe: Add the support of host validation to TlsDxe driver(CVE-2019-14553) Wu, Jiaxin
2019-09-27  3:44 ` [PATCH v1 4/4] NetworkPkg/HttpDxe: Set the HostName for the verification(CVE-2019-14553) Wu, Jiaxin
2019-09-29  6:09 ` [edk2-devel] [PATCH v1 0/4] Support HTTPS HostName validation feature(CVE-2019-14553) Wang, Jian J
2019-09-30 23:21   ` Laszlo Ersek
2019-10-01  9:02     ` David Woodhouse
2019-10-08  6:19       ` Wu, Jiaxin
2019-10-09  7:53         ` David Woodhouse
2019-10-09 20:24           ` Laszlo Ersek
2019-10-09 20:34             ` David Woodhouse
2019-10-10  3:11               ` Wu, Jiaxin
2019-10-10  8:00               ` Laszlo Ersek
2019-10-10 15:45                 ` David Woodhouse
2019-10-10 18:03                   ` Laszlo Ersek
2019-10-11  2:24                     ` Wu, Jiaxin
2019-10-11  6:58                       ` David Woodhouse
2019-10-11  8:04                         ` Wu, Jiaxin
2019-10-11 10:55                       ` Laszlo Ersek
2019-10-11 11:16                         ` David Woodhouse
2019-10-11 15:36                           ` Laszlo Ersek
2019-10-11 16:01                             ` David Woodhouse
2019-10-14 16:15                               ` Laszlo Ersek
2019-10-14 16:20                                 ` Laszlo Ersek
2019-10-14 16:53                                 ` David Woodhouse
2019-10-15 11:03                                 ` David Woodhouse
2019-10-15 11:06                                   ` David Woodhouse [this message]
2019-10-15 13:54                                   ` Laszlo Ersek
2019-10-15 15:29                                     ` David Woodhouse
2019-10-15 16:56                                     ` Laszlo Ersek
2019-10-15 17:34                                       ` Laszlo Ersek
2019-10-16  9:40                                         ` David Woodhouse
2019-10-16 10:27                                           ` Laszlo Ersek
2019-10-15 15:57                     ` David Woodhouse
2019-10-15 17:28                       ` Laszlo Ersek
2019-10-10  2:45           ` Wu, Jiaxin
2019-10-09 15:54     ` Laszlo Ersek
2019-10-10  2:46       ` Wu, Jiaxin
2019-10-15 23:08 ` [RFC v1 5/4] CryptoPkg/TlsLib: accept peer certs via both DNS names and IP addresses Laszlo Ersek
2019-10-16  5:18   ` [edk2-devel] " Wu, Jiaxin
2019-10-16  7:36     ` Laszlo Ersek
2019-10-16  7:54       ` Laszlo Ersek
2019-10-16  7:56         ` David Woodhouse
2019-10-16  8:08       ` Laszlo Ersek
2019-10-16  9:19       ` David Woodhouse
2019-10-16 11:41         ` Laszlo Ersek
2019-10-16 13:35           ` David Woodhouse
2019-10-16 14:43             ` Laszlo Ersek
2019-10-16 15:25               ` David Woodhouse
2019-10-17 15:35                 ` Laszlo Ersek
2019-10-17 15:49                   ` David Woodhouse
2019-10-18 13:25                     ` Laszlo Ersek
2019-10-25  2:12                       ` Wu, Jiaxin
2019-10-25  8:14                         ` Laszlo Ersek
2019-10-24 19:47                     ` Laszlo Ersek
2019-10-25  2:13                       ` Wu, Jiaxin
2019-10-25  2:12               ` Wu, Jiaxin
2019-10-25  2:12           ` Wu, Jiaxin
2019-10-16  8:45     ` David Woodhouse
2019-10-16 11:01   ` David Woodhouse

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-list from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1e1731be80194dfbf99cf24efa4ac79c2d5a6c3c.camel@infradead.org \
    --to=devel@edk2.groups.io \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox