Verify SSH public key authentication

[troglobit]

Main Test

• Create a new private/public key pair using ssh-keygen, e.g., ssh-keygen -f /tmp/foobar -N ""
• Verify user can fetch data using only the public key, either:
  • NETCONF data, e.g., operational status
  • /var/log/syslog

Optional

• Create a new user guest, do not set a password
• For the section authorized-key, extract the relevant portions of the public key:
  • for algorithm option, extract first part of the public key, e.g., ssh-rsa
  • for key-data option, extract the middle part of the public key
• Add the new user to an NACM group that has access to read something (limited) from the system