[bug]: Memory leak in res_stir_shaken tn_config, plus a few other issues

[gtjoseph]

Severity

Major

Versions

18,20,21,master

Components/Modules

res_stir_shaken

Operating Environment

all

Frequency of Occurrence

Occasional

Issue Description

• The tn_get_etn() function isn't releasing the etn if tn or eprofile were null.
• We're not canonicalizing TNs before using them to match configured TN objects or before adding them to Identity headers.
• There's a typo in stir_shaken.conf.sample, line 416. "endpoint_behhavior" should be "endpoint_behavior".

Relevant log output

No response

Asterisk Issue Guidelines

• [X] Yes, I have read the Asterisk Issue Guidelines