Description
SSH public key management and OpenSSH integration.
Setup
- Make sure you have SSSD 1.9.0beta7 or later installed (Koji build).
- Install FreeIPA server with DNS on one machine,
server.ipa.example.com, and FreeIPA client on another machine,client.ipa.example.com(see Basic installation tests).
How to test
Verify installation
First authenticate as admin:
user@server$ kinit admin
Verify that the host entry of server.ipa.example.com has the correct SSH public keys set:
user@server$ ipa host-show server.ipa.example.com --all Host name: server.ipa.example.com Principal name: host/server.ipa.example.com@IPA.EXAMPLE.COM SSH public key fingerprint: 5A:CE:70:8F:A3:AF:57:C1:D1:C0:C6:28:FC:D4:42:07 (ssh-dss), 76:2B:1F:98:1C:02:EE:29:43:C1:18:FD:75:57:36:8F (ssh-rsa) Password: False Keytab: True Managed by: server.ipa.example.com user@server$ ssh-keygen -l -f /etc/ssh/ssh_host_dsa_key.pub 1024 5a:ce:70:8f:a3:af:57:c1:d1:c0:c6:28:fc:d4:42:07 (DSA) user@server$ ssh-keygen -l -f /etc/ssh/ssh_host_rsa_key.pub 2048 76:2b:1f:98:1c:02:ee:29:43:c1:18:fd:75:57:36:8f (RSA)
The same procedure can be used to verify host public keys of client.ipa.example.com.
Verify that DNS SSHFP records were updated correctly:
user@server$ dig +short server.ipa.example.com SSHFP 2 1 D017B7B96C1CF0DC9A9CC317AED198EBE61C8369 1 1 EEA71C381935401361301366B2E4E2627CB470CD user@server$ ssh-keygen -r server.ipa.example.com -f /etc/ssh/ssh_host_dsa_key.pub server.ipa.example.com IN SSHFP 2 1 d017b7b96c1cf0dc9a9cc317aed198ebe61c8369 user@server$ ssh-keygen -r server.ipa.example.com -f /etc/ssh/ssh_host_rsa_key.pub server.ipa.example.com IN SSHFP 1 1 eea71c381935401361301366b2e4e2627cb470cd
Again, the same procedure can be used to verify DNS SSHFP records of client.ipa.example.com.
Public key management
Generate a SSH keypair and create new FreeIPA user with the public key set:
user@server$ ssh-keygen -t rsa user@server$ ipa user-add user --uid=$UID --first=User --last=Test --sshpubkey=‘cat .ssh/id_rsa.pub‘
Verify that the user entry has the correct SSH public key set:
user@server$ ipa user-show user User login: user First name: User Last name: Test Home directory: /home/user Login shell: /bin/sh UID: 1000 GID: 1000 Account disabled: False SSH public key fingerprint: 38:FA:5A:79:DF:21:D6:C6:EC:F0:5C:98:8A:4F:AF:04 user@server.ipa.example.com (ssh-rsa) Password: False Member of groups: ipausers Kerberos keys available: False user@server$ ssh-keygen -l -f .ssh/id_rsa.pub 2048 38:fa:5a:79:df:21:d6:c6:ec:f0:5c:98:8a:4f:af:04 user@server.ipa.example.com (RSA)
You can experiment further with ipa user-add, ipa user-mod, ipa host-add, ipa host-mod commands, all of them allow setting SSH public keys using the --sshpubkey option. Note that you can't use --sshpubkey to add or delete public keys of a user or host, you have to use --addattr ipasshpubkey=... or --delattr ipasshpubkey=... instead.
OpenSSH integration
Now that public keys for both hosts and user are set, you can try using ssh to log in remotely from server.ipa.example.com to client.ipa.example.com and vice-versa:
user@server$ ssh user@client
user@client$ ssh user@server
Both these commands should work without any warnings or errors and should NOT prompt for verification of host identity or password.
Expected Results
All the test steps should end with the specified results.