as400: add ssl connection

[garnier-quentin]

Community contributors

Description

Add capability to use AS400 SSL connection.
The plugin has a new option: --ssl.

Type of change

• Patch fixing an issue (non-breaking change)
• New functionality (non-breaking change)
• Functionality enhancement or optimization (non-breaking change)
• Breaking change (patch or feature) that might cause side effects breaking part of the Software

How this pull request can be tested ?

For the SSL connection, the port 9475 must be opened from the poller. If you check it, you surely have the error:

UNKNOWN: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

You need to import the target AS400 certificate on your poller. How could do that ?

Get the certificate (change the IP with your AS400 IP):

openssl s_client -showcerts -connect 192.168.23.13:9475
....
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
...

Create a file as400_192.168.23.13.crt with the BEGIN and END certificate section from previous command.
Import the certificate (the path is for centos 7):

# keytool -importcert -keystore /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.412.b08-1.el7_9.x86_64/jre/lib/security/cacerts -storepass changeit -file as400_192.168.23.13.crt -alias " as400_192.168.23.13"
...
Trust this certificate? [no]:  yes
Certificate was added to keystore

Now it should work with option --ssl.

Checklist

• I have followed the coding style guidelines provided by Centreon
• I have commented my code, especially hard-to-understand areas of the PR.
• I have rebased my development branch on the base branch (develop).
• I have provide data or shown output displaying the result of this code in the plugin area concerned.