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Commit 326c45c4 authored by Igor Pecovnik's avatar Igor Pecovnik
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SSH daemon configuration management RFC.

parent a4e51344
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README.md
View file @ 326c45c4
......@@ -55,7 +55,7 @@ Login as root and type:
**Running this utility on 3rd party Debian based distributions**
# Install dependencies
apt install git bc expect rcconf dialog network-manager sunxi-tools iptables resolvconf debconf-utils unzip build-essential html2text apt-transport-https html2text dirmngr software-properties-common
apt install git bc expect rcconf dialog network-manager sunxi-tools iptables resolvconf debconf-utils unzip build-essential html2text apt-transport-https html2text dirmngr software-properties-common libpam-google-authenticator qrencode
git clone https://github.com/armbian/config
cd config
......
debian-config-functions
View file @ 326c45c4
......@@ -73,6 +73,24 @@ function is_package_manager_running() {
#
# display qr code for google authemtication method
#
function display_qr_code()
{
clear
SECRET=$(head -1 /root/.google_authenticator)
qrencode -d 9 -8 -t UTF8 "otpauth://totp/test?secret=$SECRET"
echo -e "\nSetting up your OTP-generator\
\nInstall Google Authenticator generator application on your mobile phone from Android market (e.g. FreeOTP) or from F-Droid.\
\nIn the applications menu click the corresponding button to create a new account and either scan the QR code, or enter the secret key manually:\
\n\n$SECRET \n\nNow you should see a new passcode token being generated every 60 seconds on your phone.\n" | fold -sw 38
read -n 1 -s -r -p "Press any key to continue"
}
#
# show disclaimer
#
......
debian-config-jobs
View file @ 326c45c4
......@@ -956,26 +956,34 @@ function jobs ()
DIALOG_ESC=255
LIST_CONST=7
# variables cleanup
PermitRootLogin="";
PubkeyAuthentication="";
X11Forwarding="";
PhoneAuthentication="";
[[ $(grep "^PermitRootLogin" /etc/ssh/sshd_config | awk '{print $2}') == "yes" ]] && PermitRootLogin="on"
[[ $(grep "^PubkeyAuthentication" /etc/ssh/sshd_config | awk '{print $2}') == "yes" ]] && PubkeyAuthentication="on"
[[ $(grep "^X11Forwarding" /etc/ssh/sshd_config | awk '{print $2}') == "yes" ]] && X11Forwarding="on"
[[ $(grep "^ChallengeResponseAuthentication" /etc/ssh/sshd_config | awk '{print $2}') == "yes" ]] && PhoneAuthentication="on"
MOTD=("X11Forwarding" "X11 forwarding" "$X11Forwarding" \
"PermitRootLogin" "Allow root login" "$PermitRootLogin")
MOTD+=( "PubkeyAuthentication" "Use public keys for SSH authentication" "$PubkeyAuthentication" )
MOTD+=( "PhoneAuthentication" "Use keys and mobile phone with one-time passcode" "$PhoneAuthentication" )
PasswordAuthentication="";
PhoneAuthentication=""
MergeParameter="";
EXTRABUTTON="";
# read values
[[ $(grep "^PermitRootLogin" /etc/ssh/sshd_config | awk '{print $2}') == "yes" ]] && PermitRootLogin="on"
[[ $(grep "^PasswordAuthentication" /etc/ssh/sshd_config | awk '{print $2}') == "yes" ]] && PasswordAuthentication="on"
[[ $(grep "^PubkeyAuthentication" /etc/ssh/sshd_config | awk '{print $2}') == "yes" ]] && PubkeyAuthentication="on"
[[ -n $(grep "pam_google_authenticator.so" /etc/pam.d/sshd) ]] && PhoneAuthentication="on"
# create menu
MOTD=( "PermitRootLogin" "Allow root login" "$PermitRootLogin" )
MOTD+=( "PasswordAuthentication" "Password login" "$PasswordAuthentication" )
MOTD+=( "PubkeyAuthentication" "SSH key login" "$PubkeyAuthentication" )
MOTD+=( "PhoneAuthentication" "Mobile phone one-time passcode" "$PhoneAuthentication" )
LISTLENGHT="$(($LIST_CONST+${#MOTD[@]}/2))"
if [[ $PhoneAuthentication == "on" ]]; then
EXTRABUTTON="--help-button --help-label Generate-token";
[[ -f ~/.google_authenticator ]] && EXTRABUTTON="--help-button --help-label Generate-token --extra-button --extra-label Show-token";
fi
exec 3>&1
selection=$(dialog --backtitle "$BACKTITLE" --title " Toggle sshd options " --clear --cancel-label \
selection=$(dialog $EXTRABUTTON --backtitle "$BACKTITLE" --title " Toggle sshd options " --clear --cancel-label \
"Cancel" --ok-label "Save" --checklist "\nChoose what you want to enable or disable:\n " \
$LISTLENGHT 80 21 "${MOTD[@]}" 2>&1 1>&3)
exit_status=$?
......@@ -990,56 +998,77 @@ function jobs ()
my_array=($selection)
for((n=0;n<${#MOTD[@]};n++)); do
if (( $(($n % 3 )) == 0 )); then
# generic options if any
if [[ " ${my_array[*]} " == *" ${MOTD[$n]} "* ]]; then
sed -i "s/#\?${MOTD[$n]}.*/${MOTD[$n]} yes/" /etc/ssh/sshd_config
sed -i "s/^#\?${MOTD[$n]}.*/${MOTD[$n]} yes/" /etc/ssh/sshd_config
else
sed -i "s/#\?${MOTD[$n]}.*/${MOTD[$n]} no/" /etc/ssh/sshd_config
sed -i "s/^#\?${MOTD[$n]}.*/${MOTD[$n]} no/" /etc/ssh/sshd_config
fi
if [[ " ${my_array[*]} " == *" PhoneAuthentication "* ]]; then
grep pam_google_authenticator /etc/pam.d/sshd >/dev/null || sed -i "s/^\@include common-password.*/@include common-password\nauth required pam_google_authenticator.so nullok/" /etc/pam.d/sshd
sed -i "s/^ChallengeResponseAuthentication.*/ChallengeResponseAuthentication yes/" /etc/ssh/sshd_config
sed -i -n '/and ChallengeResponseAuthentication to/{p;:a;N;/UsePAM yes/!ba;s/.*\n/AuthenticationMethods publickey,password publickey,keyboard-interactive\n/};p' /etc/ssh/sshd_config
sed -i "s/^\@include common-auth/\#@include common-auth/" /etc/pam.d/sshd
# enable ssh key auth
#sed -i "s/^PubkeyAuthentication.*/PubkeyAuthentication yes/" /etc/ssh/sshd_config
else
if [[ $n -eq 0 ]]; then
# phone
if [[ " ${my_array[*]} " == *" PhoneAuthentication "* ]]; then
MergeParameter="keyboard-interactive"
sed -i "s/^#\?ChallengeResponseAuthentication.*/ChallengeResponseAuthentication yes/" /etc/ssh/sshd_config
sed -i -n '/password updating/{p;:a;N;/@include common-password/!ba;s/.*\n/auth required pam_google_authenticator.so nullok\n/};p' /etc/pam.d/sshd
else
MergeParameter=""
sed -i '/^auth required pam_google_authenticator.so nullok/ d' /etc/pam.d/sshd
sed -i "s/^ChallengeResponseAuthentication.*/ChallengeResponseAuthentication no/" /etc/ssh/sshd_config
sed -i '/^AuthenticationMethods publickey,password publickey,keyboard-interactive/ d' /etc/ssh/sshd_config
sed -i "s/^\#@include common-auth/\@include common-auth/" /etc/pam.d/sshd
sed -i "s/^#\?ChallengeResponseAuthentication.*/ChallengeResponseAuthentication no/" /etc/ssh/sshd_config
fi
# password
if [[ " ${my_array[*]} " == *" PasswordAuthentication "* ]]; then
MergeParameter="password keyboard-interactive"
sed -i "s/^#\?PasswordAuthentication.*/PasswordAuthentication yes/" /etc/ssh/sshd_config
sed -i "s/^#\?ChallengeResponseAuthentication.*/ChallengeResponseAuthentication yes/" /etc/ssh/sshd_config
sed -i "s/^\#@include common-auth/\@include common-auth/" /etc/pam.d/sshd
else
sed -i "s/^#\?PasswordAuthentication.*/PasswordAuthentication no/" /etc/ssh/sshd_config
#sed -i "s/^#\?ChallengeResponseAuthentication.*/ChallengeResponseAuthentication no/" /etc/ssh/sshd_config
sed -i "s/^\@include common-auth/\#@include common-auth/" /etc/pam.d/sshd
fi
# pubkey
if [[ " ${my_array[*]} " == *" PubkeyAuthentication "* ]]; then
MergeParameter="publickey keyboard-interactive "
sed -i "s/^#\?PubkeyAuthentication.*/PubkeyAuthentication yes/" /etc/ssh/sshd_config
else
sed -i "s/^#\?PubkeyAuthentication.*/PubkeyAuthentication no/" /etc/ssh/sshd_config
fi
if [[ " ${my_array[*]} " == *" PubkeyAuthentication "* && " ${my_array[*]} " == *" PhoneAuthentication "* ]]; then
MergeParameter="publickey,password publickey,keyboard-interactive"
sed -i "s/^#\?PubkeyAuthentication.*/PubkeyAuthentication yes/" /etc/ssh/sshd_config
fi
fi
fi
done
PubkeyAuthentication="";
[[ $(grep "^PubkeyAuthentication" /etc/ssh/sshd_config | awk '{print $2}') == "yes" ]] && PubkeyAuthentication="on"
if [[ $PubkeyAuthentication != "on" ]]; then
sed -i '/^AuthenticationMethods publickey,password publickey,keyboard-interactive/ d' /etc/ssh/sshd_config
sed -i -n '/and ChallengeResponseAuthentication to/{p;:a;N;/UsePAM yes/!ba;s/.*\n/AuthenticationMethods password keyboard-interactive\n/};p' /etc/ssh/sshd_config
sed -i "s/^PubkeyAuthentication.*/PubkeyAuthentication no/" /etc/ssh/sshd_config
sed -i "s/^\#@include common-auth/\@include common-auth/" /etc/pam.d/sshd
if [[ -z $MergeParameter ]]; then
sed -i '/^AuthenticationMethods.*/ d' /etc/ssh/sshd_config
else
sed -i '/^AuthenticationMethods.*/ d' /etc/ssh/sshd_config
sed -i -n '/and ChallengeResponseAuthentication to/{p;:a;N;/UsePAM yes/!ba;s/.*\n/AuthenticationMethods '"$MergeParameter"'\n/};p' /etc/ssh/sshd_config
fi
# reload sshd
systemctl restart sshd.service
;;
3)
display_qr_code
;;
2)
google-authenticator -t -d -f -r 3 -R 30 -W -q
display_qr_code
;;
esac
done
if [[ $PhoneAuthentication == "on" ]]; then
if [[ -f ~/.google_authenticator ]]; then
dialog --title " Enabling two-factor authentication " --backtitle "$BACKTITLE" --yes-label "No" --no-label "Yes" --yesno \
"\nYou have enabled Google one time phone authentication.\n\nYou will need a smartphone or another client device with an authenticator application such as Google Authenticator or Authy.\
\n\nMake sure you have your tokens on your phone otherwise you will not be able to log in.\
\n\nDo you want to create new tokens and transfer them to the phone?" 17 61
fi
if [[ $? == 1 || ! -f ~/.google_authenticator ]]; then
google-authenticator -t -d -f -r 3 -R 30 -W
# all users on system shall use the same
for i in /home/* ; do cp ~/.google_authenticator $i/.google_authenticator; chown "${i/\/home\//}"."${i/\/home\//}" $i/.google_authenticator; done
read
fi
fi
;;
......
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