Himmelblau is an interoperability suite for Microsoft Azure Entra ID and Intune.
The name of the project comes from a German word for Azure (sky blue).
Himmelblau supports Linux authentication to Microsoft Azure Entra ID via PAM and NSS modules. The PAM and NSS modules communicate with Entra ID via the himmelblaud daemon. Himmelblau plans to enforce Intune MDM policies, but this work isn't completed yet.
You can reach out on the Himmelblau community matrix channel or on the Samba Technical community matrix channel.
Himmelblau is a Samba Team project. The core libraries used in Himmelblau are being developed for use in Winbind. In fact, Himmelblau is simply the Kanidm unix client utilizing the Winbind libraries written for Azure Entra ID. If you would like to make financial contributions to this project, please make your donations to the Samba Team.
Himmelblau is currently only being built on openSUSE. Packaging contributions are welcome!
On openSUSE Tumbleweed, refresh the repos and install himmelblau:
sudo zypper ref && sudo zypper in himmelblau nss-himmelblau pam-himmelblauOn openSUSE Leap and SUSE Linux Enterprise, first add the experimental repo:
# For Leap 15.6 or SUSE Linux Enterprise 15 SP6:
sudo zypper ar https://download.opensuse.org/repositories/network:/idm/15.6/network:idm.repo
# For Leap 15.5 or SUSE Linux Enterprise 15 SP5:
sudo zypper ar https://download.opensuse.org/repositories/network:/idm/15.5/network:idm.repo
# For Leap 15.4 or SUSE Linux Enterprise 15 SP4:
sudo zypper ar https://download.opensuse.org/repositories/network:/idm/15.4/network:idm.repoThen refresh the repos and install himmelblau:
sudo zypper ref && sudo zypper in himmelblau nss-himmelblau pam-himmelblau
The following packages are required on openSUSE to build and test this package.
sudo zypper in cargo git gcc sqlite3-devel libopenssl-3-devel pam-devel libcap-devel libtalloc-devel libtevent-devel libldb-devel libdhash-devel krb5-devel pcre2-devel libclang13 autoconf
Or on Ubuntu:
sudo apt-get install libpam0g-dev libudev-dev libssl-dev pkg-config tpm-udev libtss2-dev libcap-dev libtalloc-dev libtevent-dev libldb-dev libdhash-dev libkrb5-dev libpcre2-dev libclang-13-dev autoconf gettext
You can build the components with
cd himmelblau; make
To test debug builds you can use these directly out of the build directory, but you must link the libraries to the correct locations
WARNING you should only do this on a disposable machine or a machine you are willing to recover with single user mode.
# You must use the full paths!
ln -s /root/himmelblau/target/debug/libpam_himmelblau.so /usr/lib64/security/pam_himmelblau.so
ln -s /root/himmelblau/target/debug/libnss_himmelblau.so /usr/lib64/libnss_himmelblau.so.2
Configure your instance
mkdir /etc/himmelblau/
cp src/config/himmelblau.conf.example /etc/himmelblau/himmelblau.conf
vim /etc/himmelblau/himmelblau.conf
It's essential that you configure the domains and pam_allow_groups options, otherwise
no users will be able to authenticate. These options designate the list of domains and users
or groups which are allowed access to the host.
Run the daemon with:
cargo run --bin=himmelblaud -- -d -c ./src/config/himmelblau.conf.example &
sudo cargo run --bin=himmelblaud_tasks -- &
Check systemd journal for errors.
Disable nscd
systemctl stop nscd
systemctl disable nscd
systemctl mask nscd
Setup NSS
cp /usr/etc/nsswitch.conf /etc/nsswitch.conf
# vim /etc/nsswitch.conf
passwd: compat systemd himmelblau
group: compat systemd himmelblau
shadow: compat systemd himmelblau
WARNING It's essential that the systemd nss module be added before the himmelblau nss module, otherwise you will encounter deadlocks in himmelblau (nss recursion caused by systemd skipping compat/files).
Check that you can resolve a user with
getent passwd <name>
Setup PAM
old /etc/pam.d/{common-account,common-auth,common-password,common-session}
cp /etc/pam.d/common-password-pc /etc/pam.d/common-password
cp /etc/pam.d/common-auth-pc /etc/pam.d/common-auth
cp /etc/pam.d/common-account-pc /etc/pam.d/common-account
cp /etc/pam.d/common-session-pc /etc/pam.d/common-session
# vim /etc/pam.d/common-auth
auth required pam_env.so
auth [default=1 ignore=ignore success=ok] pam_localuser.so
auth sufficient pam_unix.so nullok try_first_pass
auth sufficient pam_himmelblau.so ignore_unknown_user
auth required pam_deny.so
# vim /etc/pam.d/common-account
account [default=1 ignore=ignore success=ok] pam_localuser.so
account sufficient pam_unix.so
account sufficient pam_himmelblau.so ignore_unknown_user
account required pam_deny.so
# vim /etc/pam.d/common-session
session optional pam_systemd.so
session required pam_limits.so
session optional pam_unix.so try_first_pass
session optional pam_umask.so
session optional pam_himmelblau.so
session optional pam_env.so