[erlang-questions] Erlang Crypto R16+ and Centos 6.4+ incompatibility

Matt Lewandowsky <>
Tue Dec 17 01:20:48 CET 2013

The RHEL OpenSSL changes have been a subject of conversation on a variety of lists lately.


http://rhn.redhat.com/errata/RHBA-2013-1751.html is (I believe) the appropriate errata for what you are seeing and Red Hat’s current packages should correct it. If CentOS has the same packages as what is available via RHN, it might be interesting to know what happens if you roll back your OpenSSL package a month or so (to before the FIPS changes). It’s entirely possible that there are still issues which need RH Bugzilla entries.


I haven’t built Erlang on an RHEL 6 clone since the OpenSSL changes have occurred. However, crypto seemed to work fine the last time I did. (I’d say about 6 weeks ago.)





Matt Lewandowsky

Big Geek



+1 415 578 5782 (US) +44 844 484 8254 (UK)


From:  [mailto:] On Behalf Of John Doe
Sent: Monday, 16 December, 2013 14:39
Subject: [erlang-questions] Erlang Crypto R16+ and Centos 6.4+ incompatibility


At the moment it is impossible to run crypto app from Erlang R16+ on recent Centos versions (6.4 or newer) and likely on newer versions of Fedora and RHEL as well.

openssl 1.0.1 is installed.


Unable to load crypto library. Failed with error:

"load_failed, Failed to load NIF library: 'crypto.so: undefined symbol: EC_GROUP_new_curve_GF2m'"



Crypto from R15B03 works with no problems

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