/mandos/trunk

To get this branch, use:
bzr branch http://bzr.recompile.se/loggerhead/mandos/trunk
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
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
#!/bin/sh
# This script can be called in the following ways:
#
# After the package was installed:
#       <postinst> configure <old-version>
#
#
# If prerm fails during upgrade or fails on failed upgrade:
#       <old-postinst> abort-upgrade <new-version>
#
# If prerm fails during deconfiguration of a package:
#       <postinst> abort-deconfigure in-favour <new-package> <version>
#                  removing <old-package> <version>
#
# If prerm fails during replacement due to conflict:
#       <postinst> abort-remove in-favour <new-package> <version>

set -e

# Update the initial RAM file system image
update_initramfs()
{
    update-initramfs -u -k all
    
    if dpkg --compare-versions "$2" lt-nl "1.0.10-1"; then
        # Make old initrd.img files unreadable too, in case they were
        # created with mandos-client 1.0.8 or older.
	find /boot -maxdepth 1 -type f -name "initrd.img-*.bak" \
	    -print0 | xargs --null --no-run-if-empty chmod o-r
    fi
}

# Add user and group
add_mandos_user(){
    # Rename old "mandos" user and group
    if dpkg --compare-versions "$2" lt "1.0.3-1"; then
	case "`getent passwd mandos`" in
	    *:Mandos\ password\ system,,,:/nonexistent:/bin/false)
		usermod --login _mandos mandos
		groupmod --new-name _mandos mandos
		return
		;;
	esac
    fi
    # Create new user and group
    if ! getent passwd _mandos >/dev/null; then
	adduser --system --force-badname --quiet --home /nonexistent \
	    --no-create-home --group --disabled-password \
	    --gecos "Mandos password system" _mandos
    fi
}

# Create client key pairs
create_keys(){
    # If the OpenPGP key files do not exist, generate all keys using
    # mandos-keygen
    if ! [ -r /etc/keys/mandos/pubkey.txt \
	      -a -r /etc/keys/mandos/seckey.txt ]; then
	mandos-keygen
	gpg-connect-agent KILLAGENT /bye || :
	return 0
    fi

    # If the TLS keys already exists, do nothing
    if [ -r /etc/keys/mandos/tls-privkey.pem \
	    -a -r /etc/keys/mandos/tls-pubkey.pem ]; then
	return 0
    fi

    # If this is an upgrade from an old installation, the TLS keys
    # will not exist; create them.

    # First try certtool from GnuTLS
    if ! certtool --generate-privkey --password='' \
	 --outfile /etc/keys/mandos/tls-privkey.pem \
	 --sec-param ultra --key-type=ed25519 --pkcs8 --no-text \
	 2>/dev/null; then
	# Otherwise try OpenSSL
	if ! openssl genpkey -algorithm X25519 \
	     -out /etc/keys/mandos/tls-privkey.pem; then
	    rm --force /etc/keys/mandos/tls-privkey.pem
	    # None of the commands succeded; give up
	    return 1
	fi
    fi

    local umask=$(umask)
    umask 077
    # First try certtool from GnuTLS
    if ! certtool --password='' \
	 --load-privkey=/etc/keys/mandos/tls-privkey.pem \
	 --outfile=/etc/keys/mandos/tls-pubkey.pem --pubkey-info \
	 --no-text 2>/dev/null; then
	# Otherwise try OpenSSL
	if ! openssl pkey -in /etc/keys/mandos/tls-privkey.pem \
	     -out /etc/keys/mandos/tls-pubkey.pem -pubout; then
	    rm --force /etc/keys/mandos/tls-pubkey.pem
	    # None of the commands succeded; give up
	    umask $umask
	    return 1
	fi
    fi
    umask $umask
}

create_dh_params(){
    if [ -r /etc/keys/mandos/dhparams.pem ]; then
	return 0
    fi
    # Create a Diffe-Hellman parameters file
    DHFILE="`mktemp -t mandos-client-dh-parameters.XXXXXXXXXX.pem`"
    # First try certtool from GnuTLS
    if ! certtool --generate-dh-params --sec-param high \
	 --outfile "$DHFILE"; then
	# Otherwise try OpenSSL
	if ! openssl genpkey -genparam -algorithm DH -out "$DHFILE" \
	     -pkeyopt dh_paramgen_prime_len:3072; then
	    # None of the commands succeded; give up
	    rm -- "$DHFILE"
	    return 1
	fi
    fi
    sed --in-place --expression='0,/^-----BEGIN DH PARAMETERS-----$/d' \
	"$DHFILE"
    sed --in-place --expression='1i-----BEGIN DH PARAMETERS-----' \
	    "$DHFILE"
    cp --archive "$DHFILE" /etc/keys/mandos/dhparams.pem
    rm -- "$DHFILE"
}

case "$1" in
    configure)
	add_mandos_user "$@"
	create_keys "$@"
	create_dh_params "$@" || :
	update_initramfs "$@"
	if dpkg --compare-versions "$2" lt-nl "1.7.10-1"; then
	    PLUGINHELPERDIR=/usr/lib/$(dpkg-architecture -qDEB_HOST_MULTIARCH 2>/dev/null)/mandos/plugin-helpers
	    if ! dpkg-statoverride --list "$PLUGINHELPERDIR" \
		 >/dev/null 2>&1; then
		chmod u=rwx,go= -- "$PLUGINHELPERDIR"
	    fi
	    if ! dpkg-statoverride --list /etc/mandos/plugin-helpers \
		 >/dev/null 2>&1; then
		chmod u=rwx,go= -- /etc/mandos/plugin-helpers
	    fi
	fi
	;;
    abort-upgrade|abort-deconfigure|abort-remove)
	;;

    *)
	echo "$0 called with unknown argument '$1'" 1>&2
	exit 1
	;;
esac

#DEBHELPER#

exit 0