[cisco_asa] Add TCP input with TLS support

[taylor-swanson]

What does this PR do?

• Add TCP input, with TLS and custom options support
• Add system test for TCP input

Checklist

• I have reviewed tips for building integrations and this pull request is aligned with them.
• I have verified that all data streams collect metrics or logs.
• I have added an entry to my package's changelog.yml file.
• I have verified that Kibana version constraints are current according to guidelines.

How to test this PR locally

cd packages/cisco_asa && elastic-package test

Related issues

• Relates Firewall Integration Input Consistency  #1878

Screenshots

[elasticmachine]

💚 Build Succeeded

the below badges are clickable and redirect to their specific view in the CI or DOCS

Expand to view the summary

Build stats

• Start Time: 2022-05-12T07:55:00.863+0000

• Duration: 18 min 6 sec

Test stats 🧪

Test	Results
Failed	0
Passed	29
Skipped	0
Total	29

🤖 GitHub comments

To re-run your PR in the CI, just comment with:

• /test : Re-trigger the build.

[elasticmachine]

🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (1/1)	💚
Files	100.0% (1/1)	💚 3.597
Classes	100.0% (1/1)	💚 3.597
Methods	94.444% (17/18)	👍 6.198
Lines	63.155% (1097/1737)	👎 -25.958
Conditionals	100.0% (0/0)	💚

[elasticmachine]

Pinging @elastic/security-external-integrations (Team:Security-External Integrations)

[r00tu53r]

I see port clashes with other packages that use tcp|udp inputs that use syslog input (panw, checkpoint, pfsense) and a few more. Not sure if it would pose a problem but in rare cases it might if the user uses the default values.

[taylor-swanson]

I see port clashes with other packages that use tcp|udp inputs that use syslog input (panw, checkpoint, pfsense) and a few more. Not sure if it would pose a problem but in rare cases it might if the user uses the default values.

Fair point. I haven't heard of any complaints about ports yet. That may be a good idea going forward, but maybe that'd best be handled in a separate issue with greater coordination between packages (and potentially teams).

[r00tu53r]

LGTM!