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44 lines
2.2 KiB
Bash
Executable file
44 lines
2.2 KiB
Bash
Executable file
#!/bin/bash
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# SEE ALSO: /etc/xdg/lxsession/LXDE-pi/sshpwd-lxde-iiab.sh sourced from...
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# https://github.com/iiab/iiab/blob/master/roles/iiab-admin/templates/sshpwd-lxde-iiab.sh
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# ...invoked by /etc/xdg/lxsession/LXDE-pi/autostart which is customized by...
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# https://github.com/iiab/iiab/blob/master/roles/iiab-admin/tasks/main.yml#L46-L50
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# For Localization/Translation: (use /usr/bin/gettext below if later nec!)
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#export TEXTDOMAIN=Linux-PAM
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#. gettext.sh
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# https://github.com/raspberrypi-ui/pam/blob/master/etc/profile.d/sshpwd.sh
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# https://github.com/raspberrypi-ui/pprompt/blob/master/sshpwd.sh
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# bash syntax "function check_user_pwd() {" was removed, as it prevented all
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# lightdm/graphical logins (incl autologin) on Raspbian: #1252 -> PR #1253
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check_user_pwd() {
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# 1. 'sudo su -' invokes this script as root:
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[ $(id -un) = "root" ] || return 1 # FORCE ERROR IF RUN BY NON-root
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# *BUT* overall bash script still returns exit code 0 ("success")
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# as needed by Ubuntu 20.04 graphical logins, etc!
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# 2. Graphical Logins invoke this script as the user logging in: (USELESSLY)
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#[ $(id -un) = "$1" ] || [ $(id -un) = "root" ] || return 1
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# SO FORMERLY: this could also be run by non-root accounts e.g. iiab-admin
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# if sudo access set with "%wheel ALL= NOPASSWD: ALL" in /etc/sudoers per
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# https://github.com/iiab/iiab/blob/master/roles/iiab-admin/tasks/admin-user.yml
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# BUT: warning popups did not result on most OS's, much as mentioned here:
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# https://github.com/iiab/iiab/blob/master/roles/iiab-admin/tasks/main.yml#L24-L30
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# $meth (hashing method) is typically '6' which implies 5000 rounds
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# of SHA-512 per /etc/login.defs -> /etc/pam.d/common-password
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meth=$(grep "^$1:" /etc/shadow | cut -d: -f2 | cut -d$ -f2)
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salt=$(grep "^$1:" /etc/shadow | cut -d: -f2 | cut -d$ -f3)
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hash=$(grep "^$1:" /etc/shadow | cut -d: -f2 | cut -d$ -f4)
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[ $(python3 -c "import crypt; print(crypt.crypt('$2', '\$$meth\$$salt'))") == "\$$meth\$$salt\$$hash" ]
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}
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if check_user_pwd "{{ iiab_admin_user }}" "g0adm1n"; then # iiab-admin
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echo
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echo "The published password is in use by user '{{ iiab_admin_user }}'."
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echo "THIS IS A SECURITY RISK - please run 'sudo passwd {{ iiab_admin_user }}' to change it."
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echo
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fi
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