2
# This script can be called in the following ways:
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# After the package was installed:
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# <postinst> configure <old-version>
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# If prerm fails during upgrade or fails on failed upgrade:
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# <old-postinst> abort-upgrade <new-version>
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# If prerm fails during deconfiguration of a package:
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# <postinst> abort-deconfigure in-favour <new-package> <version>
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# removing <old-package> <version>
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# If prerm fails during replacement due to conflict:
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# <postinst> abort-remove in-favour <new-package> <version>
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# Update the initial RAM file system image
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update-initramfs -u -k all
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if dpkg --compare-versions "$2" lt-nl "1.0.10-1"; then
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# Make old initrd.img files unreadable too, in case they were
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# created with mandos-client 1.0.8 or older.
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find /boot -maxdepth 1 -type f -name "initrd.img-*.bak" \
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-print0 | xargs --null --no-run-if-empty chmod o-r
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# Rename old "mandos" user and group
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if dpkg --compare-versions "$2" lt "1.0.3-1"; then
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case "`getent passwd mandos`" in
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*:Mandos\ password\ system,,,:/nonexistent:/bin/false)
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usermod --login _mandos mandos
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groupmod --new-name _mandos mandos
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# Create new user and group
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if ! getent passwd _mandos >/dev/null; then
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adduser --system --force-badname --quiet --home /nonexistent \
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--no-create-home --group --disabled-password \
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--gecos "Mandos password system" _mandos
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# Create client key pair
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if [ -r /etc/keys/mandos/pubkey.txt \
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-a -r /etc/keys/mandos/seckey.txt ]; then
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if [ -r /etc/keys/mandos/dhparams.pem ]; then
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# Create a Diffe-Hellman parameters file
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DHFILE="`mktemp -t mandos-client-dh-parameters.XXXXXXXXXX.pem`"
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# First try certtool from GnuTLS
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if ! certtool --generate-dh-params --sec-param high \
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--outfile "$DHFILE"; then
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# Otherwise try OpenSSL
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if ! openssl genpkey -genparam -algorithm DH -out "$DHFILE" \
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-pkeyopt dh_paramgen_prime_len:3072; then
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# None of the commands succeded; give up
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sed --in-place --expression='0,/^-----BEGIN DH PARAMETERS-----$/d' \
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sed --in-place --expression='1i-----BEGIN DH PARAMETERS-----' \
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cp --archive "$DHFILE" /etc/keys/mandos/dhparams.pem
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create_dh_params "$@" || :
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abort-upgrade|abort-deconfigure|abort-remove)
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echo "$0 called with unknown argument '$1'" 1>&2