postinst is in dropbear-initramfs 2016.72-1.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 | #!/bin/sh
set -e
showpubkey() {
local keyfile="$1" pubkey
if ! which ssh-keygen >/dev/null 2>&1; then
cat
else
pubkey=$(mktemp)
grep -m1 -E '^(ssh-(dss|rsa)|ecdsa-sha2-nistp(256|384|521)) ' >"$pubkey"
ssh-keygen -v -lf "$pubkey" | sed -r "1s@$pubkey(\s+\([^)]+\))\$@$keyfile\1@"
rm -f "$pubkey"
fi
}
if [ "$1" = 'configure' ] && \
[ -r /etc/initramfs-tools/initramfs.conf -a -x /usr/sbin/update-initramfs ]; then
mkdir -p /etc/initramfs-tools/etc/dropbear
for keytype in dss rsa ecdsa; do
keyfile="/etc/initramfs-tools/etc/dropbear/dropbear_${keytype}_host_key"
[ ! -e "$keyfile" ] || continue
echo "Generating Dropbear $(echo "$keytype" | tr '[a-z]' '[A-Z]') host key. Please wait." >&2
dropbearkey -t "$keytype" -f "$keyfile" | showpubkey "$keyfile"
done
# update initramfs
for i in /etc/initramfs-tools/initramfs.conf /usr/share/initramfs-tools/conf-hooks.d/*; do
[ ! -r "$i" ] || . "$i"
done
if [ "$DROPBEAR" = y ] || [ "$DROPBEAR" != n -a -r /etc/crypttab ]; then
# XXX here we could read the configured network-config, and use it
# for default values for prompting the user for the
# initramfs-network- config (subsequently writing it to menu.lst:#
# kopt= or lilo.conf), instead of just printing the reminder below.
update-initramfs -u
cat <<-EOT
Dropbear has been added to the initramfs. Don't forget to check
your "ip=" kernel bootparameter to match your desired initramfs
ip configuration.
EOT
fi
fi
exit 0
|