[erlang-questions] SSL: "unknown ca"

[e@REDACTED]

>> sorry, i am completely lost.
>> who is gonna read this info from my certificate and when?
>>
>> also it is still completely unclear where is the ORIGIN of the error:
>> "unknown ca" -- who has thrown it?
>
> Read NOTES chapter of this link :
>
> http://www.openssl.org/docs/ssl/SSL_CTX_set_client_CA_list.html
>
> You need a trusted list of CA in a bundle file.

trusted by WHOM?
what particular application makes a decision to throw me an error?