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[Openvpn-devel,XS] Change in openvpn[master]: mbedtls: Warn if --tls-version-min is too low

Message ID f5ebe4c3e2ac9bfe718df0e21a7986a03b7d3090-HTML@gerrit.openvpn.net
State Superseded
Headers show
Series [Openvpn-devel,XS] Change in openvpn[master]: mbedtls: Warn if --tls-version-min is too low | expand

Commit Message

ralf_lici (Code Review) July 3, 2024, 3:37 p.m. UTC 
Attention is currently required from: flichtenheld, plaisthos.

Hello plaisthos, flichtenheld,

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

    http://gerrit.openvpn.net/c/openvpn/+/684?usp=email

to review the following change.


Change subject: mbedtls: Warn if --tls-version-min is too low
......................................................................

mbedtls: Warn if --tls-version-min is too low

Recent versions of mbedtls only support TLS 1.2. When the minimum
version is set to TLS 1.0 or 1.1, log a warning and use 1.2 as the
actual minimum version.

Change-Id: Ibc641388d8016533c94dfef3618376f6dfa91f4e
Signed-off-by: Max Fillinger <maximilian.fillinger@foxcrypto.com>
---
M src/openvpn/options.c
1 file changed, 9 insertions(+), 0 deletions(-)



  git pull ssh://gerrit.openvpn.net:29418/openvpn refs/changes/84/684/1
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Patch

diff --git a/src/openvpn/options.c b/src/openvpn/options.c
index dbe1425..64e67aa 100644
--- a/src/openvpn/options.c
+++ b/src/openvpn/options.c
@@ -8942,6 +8942,15 @@ 
             msg(msglevel, "unknown tls-version-min parameter: %s", p[1]);
             goto err;
         }
+
+#ifdef ENABLE_CRYPTO_MBEDTLS
+        if (ver < TLS_VER_1_2)
+        {
+            msg(M_WARN, "--tls-version-min %s is not supported by mbedtls, using 1.2", p[1]);
+            ver = TLS_VER_1_2;
+        }
+#endif
+
         options->ssl_flags &=
             ~(SSLF_TLS_VERSION_MIN_MASK << SSLF_TLS_VERSION_MIN_SHIFT);
         options->ssl_flags |= (ver << SSLF_TLS_VERSION_MIN_SHIFT);