HardenedBSD ran an
exp-run with LibreSSL in base. This was expected to uncover a lot of issues where ports check the
OPENSSL_VERSION_NUMBER to determine if a feature is available. To my surprise, it only uncovered 12 ports that failed due to these version checks.
The LibreSSL ports (up to 2.4) on FreeBSD include a patch that modifies the OpenSSL version in the header files
--- include/openssl/opensslv.h.orig 2015-09-11 22:35:14 UTC +++ include/openssl/opensslv.h @@ -7,7 +7,7 @@ #define LIBRESSL_VERSION_TEXT "LibreSSL 2.3.0" /* These will never change */ -#define OPENSSL_VERSION_NUMBER 0x20000000L +#define OPENSSL_VERSION_NUMBER 0x1000107fL #define OPENSSL_VERSION_TEXT LIBRESSL_VERSION_TEXT #define OPENSSL_VERSION_PTEXT " part of " OPENSSL_VERSION_TEXT
This patch locks the OpenSSL version that is exposed to software to 1.0.1g in line with the forking of LibreSSL from OpenSSL.
This version modification was added to LibreSSL by the original maintainer to circumvent the issues that would arise if ports check OPENSSL_VERSION_NUMBER as a surrogate to detect features. This is a problematic way of checking for features, how will we ever be able to remove features this way!
Result of exp-run
When replacing OpenSSL with LibreSSL for HardenedBSD, I decided to do away with this change and see where I'd end up. Interestingly only 12 ports were failing due to these checks. As more and more software starts using features from 1.0.2 and 1.1.0 this may increase but at least the rate of these issues arising will be lower.
A side-effect of this exp-run is that we are detecting ports that do not set or honor
USES= ssl (which replaces
USE_OPENSSL= yes since June) in the port's Makefile. This means that they weren't failing when
DEFAULT_VERSIONS+= ssl=libressl-devel (which replaces
WITH_OPENSSL_PORT= yes and
OPENSSL_PORT= security/libressl-devel since June) is set during build of ports but they are failing now because there's no OpenSSL libcrypto/libssl available on the system.
All in all there are 204 ports with issues most have patches as well. Not sure if I'll ever get around to updating the number of fixes and the number of ports fixed as well, this is becoming increasingly complex to track using a wiki page!
|Problem||Description||Number of ports|
|SSLv3||SSLv3 methods removed from LibreSSL 2.3||85|
|EGD||RAND_egd methods removed from LibreSSL||38|
|DES||deprecated des_ methods (replaced by DES_ methods)||29|
|COMP||SSL compression removed from LibreSSL||10|
|SHA-0||SHA-0 methods removed from LibreSSL 2.3||8|
|SSLv2||SSLv2 methods removed from LibreSSL||7|
|arc4rand||Conflict with FreeBSD/LibreSSL libs||4|
|PSK||Pre-Shared Key removed from LibreSSL||4|
|CMS||Deprecated S/MIME methods||3|
|GOST||GOST methods removed||2|
The majority of issues is with the removal of SSLv3. This should improve quickly over the coming months as OpenSSL 1.1 gets released which removes SSLv3 in the default build configuration as well.