Attention is currently required from: plaisthos.

Hello plaisthos,

I'd like you to do a code review.
Please visit

    http://gerrit.openvpn.net/c/openvpn/+/918?usp=email

to review the following change.


Change subject: Fix compatibility with mbedTLS 2.28.10+ and 3.6.3+
......................................................................

Fix compatibility with mbedTLS 2.28.10+ and 3.6.3+

>From release notes:
In TLS clients, if mbedtls_ssl_set_hostname() has not been called,
mbedtls_ssl_handshake() now fails with
MBEDTLS_ERR_SSL_CERTIFICATE_VERIFICATION_WITHOUT_HOSTNAME
if certificate-based authentication of the server is attempted.
This is because authenticating a server without knowing what name
to expect is usually insecure. To restore the old behavior, either
call mbedtls_ssl_set_hostname() with NULL as the hostname [...]

Change-Id: I8bbb6ffdac7d0029dbf3c13e62c11b61813c15ef
Signed-off-by: Frank Lichtenheld <fr...@lichtenheld.com>
---
M src/openvpn/ssl_mbedtls.c
1 file changed, 2 insertions(+), 0 deletions(-)



  git pull ssh://gerrit.openvpn.net:29418/openvpn refs/changes/18/918/1

diff --git a/src/openvpn/ssl_mbedtls.c b/src/openvpn/ssl_mbedtls.c
index 92b52fe..a79c8db 100644
--- a/src/openvpn/ssl_mbedtls.c
+++ b/src/openvpn/ssl_mbedtls.c
@@ -1246,6 +1246,8 @@
     ALLOC_OBJ_CLEAR(ks_ssl->ctx, mbedtls_ssl_context);
     mbedtls_ssl_init(ks_ssl->ctx);
     mbed_ok(mbedtls_ssl_setup(ks_ssl->ctx, ks_ssl->ssl_config));
+    /* Tell mbedTLS that we generally do not care about the hostname */
+    mbedtls_ssl_set_hostname(ks_ssl->ctx, NULL);

 #if HAVE_MBEDTLS_SSL_SET_EXPORT_KEYS_CB
     /* Initialize keying material exporter, new style. */

--
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Gerrit-Project: openvpn
Gerrit-Branch: master
Gerrit-Change-Id: I8bbb6ffdac7d0029dbf3c13e62c11b61813c15ef
Gerrit-Change-Number: 918
Gerrit-PatchSet: 1
Gerrit-Owner: flichtenheld <fr...@lichtenheld.com>
Gerrit-Reviewer: plaisthos <arne-open...@rfc2549.org>
Gerrit-CC: openvpn-devel <openvpn-devel@lists.sourceforge.net>
Gerrit-Attention: plaisthos <arne-open...@rfc2549.org>
Gerrit-MessageType: newchange
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