From: Max Fillinger <m...@max-fillinger.net> Change-Id: Ia61c467d85d690752011bafcf112e39d5b252aa7 Signed-off-by: Max Fillinger <m...@max-fillinger.net> Acked-by: Frank Lichtenheld <fr...@lichtenheld.com> ---
This change was reviewed on Gerrit and approved by at least one developer. I request to merge it to master. Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/372 This mail reflects revision 8 of this Change. Acked-by according to Gerrit (reflected above): Frank Lichtenheld <fr...@lichtenheld.com> diff --git a/README.mbedtls b/README.mbedtls index d3466fa..9b75c2b 100644 --- a/README.mbedtls +++ b/README.mbedtls @@ -1,13 +1,13 @@ -This version of OpenVPN has mbed TLS support. To enable follow the following -instructions: +This version of OpenVPN has mbed TLS support. To enable, follow the +instructions below: -To Build and Install, +To build and install, ./configure --with-crypto-library=mbedtls make make install -This version depends on mbed TLS 2.0 (and requires at least 2.0.0). +This version requires mbed TLS version >= 2.0.0 or >= 3.2.1. ************************************************************************* @@ -16,7 +16,8 @@ As of mbed TLS 2.17, it can be licensed *only* under the Apache v2.0 license. That license is incompatible with OpenVPN's GPLv2. -If you wish to distribute OpenVPN linked with mbed TLS, there are two options: +We are currently in the process of resolving this problem, but for now, if you +wish to distribute OpenVPN linked with mbed TLS, there are two options: * Ensure that your case falls under the system library exception in GPLv2, or @@ -24,9 +25,6 @@ that may be licensed under GPLv2. Unfortunately, this version is unsupported and won't receive any more updates. -If nothing changes about the license situation, mbed TLS support may be -deprecated in a future release of OpenVPN. - ************************************************************************* Due to limitations in the mbed TLS library, the following features are missing @@ -42,3 +40,22 @@ * X.509 subject line has a different format than the OpenSSL subject line * X.509 certificate export does not work * X.509 certificate tracking + +************************************************************************* + +Mbed TLS 3 supports the TLS 1.3 protocol, but the implementation is not yet +complete. Therefore, using TLS 1.3 in the mbed TLS build of OpenVPN is not yet +supported. + +Nevertheless, here are some pointers to make it work with mbed TLS 3.5.0: + + * The stock configuration of mbed TLS does not support TLS 1.3. To enable it, + uncomment `#define MBEDTLS_SSL_PROTO_TLS1_3` in your mbedtls_config.h before + compiling the library. + * An OpenVPN client with mbed TLS cannot connect to a server with OpenSSL + using TLS 1.3. + * An OpenVPN client with OpenSSL *can* connect to a server using mbed TLS with + TLS 1.3, but *only* if `#define MBEDTLS_SSL_TLS1_3_COMPATIBILITY_MODE` has + been uncommented in mbedtls_config.h. + +Note that none of these limitations apply to TLS 1.2. _______________________________________________ Openvpn-devel mailing list Openvpn-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/openvpn-devel
