You just need to inform the certificate and key. It is informed in the docs (
Use sipp options: t -l1 -tls_cert user-cert.pem -tls_key user-privkey.pem

On Thu, 19 Dec 2019 at 03:33, Sebastian Damm <> wrote:

I'm trying to construct an end-to-end encrypted signalling test
through our setup. I thought I could use sipp for that, as it supports
TLS according to the man page. However, when I try to run it, I get
this error:

FI_init_ssl_context: SSL_CTX_use_certificate_file failed.

I searched the web; however, all similar questions end up without
answers. I tried specifying a local key and cert without success. I'd
think I should not need a cert for my client, though.

Has anyone ever successfully conducted an automated TLS test? I'm open
to using a different tool if necessary.

Thanks for all hints or examples.


Sebastian Damm
Voice Engineer
sipgate GmbH
Gladbacher Straße 74 | 40219 Düsseldorf

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