Erlang is missing crypto

[Mikael Pettersson]

On Fri, Oct 16, 2020 at 9:54 AM Aneeq Abid <aneeqabid@REDACTED> wrote:
>
> Dear Mikael Pettersson,
>
> I am a rookie with no experience with Erlang at all. Can you please guide me how I can check that? And how I can setup the library/path?

That's not specific for Erlang.  You need someone familiar with
generic Unix/Linux system-level stuff and the configuration of your
server to help you.  Google "ldd LD_LIBRARY_PATH".

Off-hand it appears openssl was installed in a non-standard location.
Don't do that unless you use LD_LIBRARY_PATH (or static linking, but
that's frowned upon).  On any reasonably modern Linux distribution you
should just use its default openssl (+ development libraries, they are
usually separate and many forget to install them).

>
> On Fri, 16 Oct 2020, 12:39 pm Mikael Pettersson, <mikpelinux@REDACTED> wrote:
>>
>> On Fri, Oct 16, 2020 at 8:35 AM Aneeq Abid <aneeqabid@REDACTED> wrote:
>> >
>> > Hi,
>> >
>> > I am facing the following error. OpenSSL is installed on the server. Can someone please provide any feedback why crypto is missing?
>> >
>> > $ erl
>> > Erlang/OTP 17 [erts-6.0] [source] [64-bit] [smp:4:4] [async-threads:10] [hipe] [kernel-poll:false]
>> >
>> > Eshell V6.0  (abort with ^G)
>> > 1> crypto:start().
>> > ** exception error: undefined function crypto:start/0
>> > 2>
>> > =ERROR REPORT==== 15-Oct-2020::23:28:36 ===
>> > Unable to load crypto library. Failed with error:
>> > "load_failed, Failed to load NIF library: '/usr/local/lib/erlang/lib/crypto-3.3/priv/lib/crypto.so: undefined symbol: HMAC_CTX_init'"
>> > OpenSSL might not be installed on this system.
>>
>> Does "ldd /usr/local/lib/erlang/lib/crypto-3.3/priv/lib/crypto.so" in
>> the Unix shell find openssl.so?  If not, then that's your problem,
>> and you may need to set up LD_LIBRARY_PATH.