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armbian: default to SSH disabled

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This commit is contained in:
nachoparker 2018-06-18 16:43:50 +02:00
parent 7b2737bf5f
commit 5aa071e069
3 changed files with 34 additions and 6 deletions
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3
armbian.sh
View File

@ -30,6 +30,9 @@ curl -sSL https://raw.githubusercontent.com/nextcloud/nextcloudpi/master/install
# force change root password at first login (again)
chage -d 0 root
# disable SSH by default, it can be enabled through ncp-web
systemctl disable sshd
# License
#

5
build-SD-rpi.sh
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@ -63,6 +63,11 @@ PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin \
# harden SSH further for Raspbian
sed -i 's|^#PermitRootLogin .*|PermitRootLogin no|' /etc/ssh/sshd_config
# default user 'pi' for SSH
sed -i 's|^USER_=.*|USER_=pi|' /usr/local/etc/ncp-config.d/SSH.sh
sed -i 's|^PASS_=.*|PASS_=raspberry|' /usr/local/etc/ncp-config.d/SSH.sh
sed -i 's|^CONFIRM_=.*|CONFIRM_=raspberry|' /usr/local/etc/ncp-config.d/SSH.sh
rm -rf /tmp/ncp-build
EOFCHROOT

32
etc/ncp-config.d/SSH.sh
View File

@ -8,21 +8,22 @@
#
ACTIVE_=no
USER_=pi
PASS_=raspberry
CONFIRM_=raspberry
USER_=root
PASS_=1234
CONFIRM_=1234
DESCRIPTION="Activate or deactivate SSH"
INFOTITLE="SSH notes"
INFO="In order to enable SSH, the password for user pi can NOT remain set to the default raspberry.
You HAVE to create a NEW password for pi if you want this program to enable SSH, it will fail if you dont!
INFO="In order to enable SSH, the password for user 'pi' can NOT remain set to the default raspberry.
You HAVE to create a NEW password for 'pi' if you want this program to enable SSH, it will fail if you dont!
The same will happen with user 'root' and password '1234'
Note: Use normal AlphaNumeric, the only special characters allowed are .,@-_/"
install() { :; }
is_active()
{
systemctl status ssh &>/dev/null
systemctl -q is-enabled ssh &>/dev/null
}
configure()
@ -39,6 +40,10 @@ configure()
echo "Refusing to use the default Raspbian user and password. It's insecure"
return 1
}
[[ "$USER_" == "root" ]] && [[ "$PASS_" == "1234" ]] && {
echo "Refusing to use the default Armbian user and password. It's insecure"
return 1
}
# Change credentials
id "$USER_" &>/dev/null || { echo "$USER_ doesn't exist"; return 1; }
@ -59,6 +64,21 @@ configure()
}
}
# Check for insecure default root password ( taken from old jessie method )
local SHADOW="$( grep -E '^root:' /etc/shadow )"
test -n "${SHADOW}" && {
local SALT=$(echo "${SHADOW}" | sed -n 's/root:\$6\$//;s/\$.*//p')
local HASH=$(mkpasswd -msha-512 1234 "$SALT")
grep -q "${HASH}" <<< "${SHADOW}" && {
systemctl stop ssh
systemctl disable ssh
echo "The user root is using the default password. Refusing to activate SSH"
echo "SSH disabled"
return 1
}
}
# Enable
chage -d 0 "$USER_"
systemctl enable ssh