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59 lines
3.9 KiB
Plaintext
59 lines
3.9 KiB
Plaintext
#%PAM-1.0
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# PAM configuration for the Secure Shell service
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# We have to disable pam_nologin as, for some reason, at least with the official CentOS docker images,
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# pam_nologin always disable login even when no /etc/nologin is present.
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#auth requisite pam_nologin.so
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# --- PASSWORD CHECK SECTION
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# proceed in this section ONLY if the user is in group mfa-password-configd, skip it entirely otherwise
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auth [success=ignore ignore=ignore default=4] pam_succeed_if.so quiet user ingroup mfa-password-configd
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auth optional pam_echo.so Your account has Multi-Factor Authentication enabled, an additional authentication factor is required (password).
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auth optional pam_exec.so quiet debug stdout /opt/bastion/bin/shell/pam_exec_pwd_info.sh
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# lock account after 6 failures, for 5 minutes
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# ... but disabled, as at least the official CentOS docker images don't seem to have pam_tally nor pam_tally2
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#auth required pam_tally2.so onerr=fail deny=6 unlock_time=300
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# then check password
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auth required pam_unix.so
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# --- TOTP CHECK SECTION
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# if root, enable TOTP check
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auth [success=ignore ignore=ignore default=1] pam_succeed_if.so quiet uid eq 0
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# [success=ok new_authtok_reqd=ok ignore=ignore default=bad module_unknown=ignore] == required + module_unknown:ignore
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# if you have a recent enough libpam-google-authenticator, you can customize the prompt with the following option: [authtok_prompt=Verification Code (OTP): ]
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# you can also add "debug" for more verbose logs (requires a not too old version of the pam module)
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# note the nullok parameter, instructing that if TOTP is not configured for root, it shouldn't be asked
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# if you know you've configured TOTP for root and prefer blocking access if there is a problem with the secret file, remove `nullok'
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auth [success=ok new_authtok_reqd=ok ignore=ignore default=bad module_unknown=ignore] pam_google_authenticator.so nullok secret=/var/otp/root
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# if root, TOTP check has already been done just above, so skip this subsection
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auth [success=3 ignore=ignore default=ignore] pam_succeed_if.so quiet uid eq 0
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# else (if not root), proceed in this section ONLY if the user is in group mfa-totp-configd, skip it entirely otherwise
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auth [success=ignore ignore=ignore default=2] pam_succeed_if.so quiet user ingroup mfa-totp-configd
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auth optional pam_echo.so Multi-Factor Authentication enabled, an additional authentication factor is required (OTP).
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auth [success=ok new_authtok_reqd=ok ignore=ignore default=bad module_unknown=ignore] pam_google_authenticator.so secret=~/.otp
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account required pam_sepermit.so
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# We have to disable pam_nologin as, for some reason, at least with the official CentOS docker images,
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# pam_nologin always disable login even when no /etc/nologin is present.
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#account required pam_nologin.so
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# Reset counter if auth succeeded
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# ... but disabled, as at least the official CentOS docker images don't seem to have pam_tally nor pam_tally2
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#account required pam_tally2.so
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account include password-auth
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password include password-auth
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# pam_selinux.so close should be the first session rule
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session required pam_selinux.so close
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session required pam_loginuid.so
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# pam_selinux.so open should only be followed by sessions to be executed in the user context
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session required pam_selinux.so open env_params
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session required pam_namespace.so
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session optional pam_keyinit.so force revoke
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session optional pam_motd.so
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session include password-auth
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session include postlogin
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