blob: 3f886987e838cbf772d32110131276a04a023360 (
plain)
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
161
162
163
164
165
166
167
168
169
170
171
|
#!/bin/sh
set -e
# We don't use a secret keyring, of course, but gpg panics and
# implodes if there isn't one available
GPG_CMD="gpg --ignore-time-conflict --no-options --no-default-keyring --secret-keyring /etc/apt/secring.gpg --trustdb-name /etc/apt/trustdb.gpg"
GPG="$GPG_CMD --keyring /etc/apt/trusted.gpg"
MASTER_KEYRING=""
ARCHIVE_KEYRING_URI=""
#MASTER_KEYRING=/usr/share/keyrings/debian-master-keyring.gpg
#ARCHIVE_KEYRING_URI=http://ftp.debian.org/debian/debian-archive-keyring.gpg
ARCHIVE_KEYRING=/usr/share/keyrings/debian-archive-keyring.gpg
REMOVED_KEYS=/usr/share/keyrings/debian-archive-removed-keys.gpg
add_keys_with_verify_against_master_keyring() {
ADD_KEYRING=$1
MASTER=$2
if [ ! -f "$ADD_KEYRING" ]; then
echo "ERROR: '$ADD_KEYRING' not found"
return
fi
if [ ! -f "$MASTER" ]; then
echo "ERROR: '$MASTER' not found"
return
fi
# when adding new keys, make sure that the archive-master-keyring
# is honored. so:
# all keys that are exported must have a valid signature
# from a key in the $distro-master-keyring
add_keys=`$GPG_CMD --keyring $ADD_KEYRING --with-colons --list-keys | grep ^pub | cut -d: -f5`
master_keys=`$GPG_CMD --keyring $MASTER --with-colons --list-keys | grep ^pub | cut -d: -f5`
for add_key in $add_keys; do
ADDED=0
for master_key in $master_keys; do
if $GPG_CMD --keyring $ADD_KEYRING --list-sigs --with-colons $add_key | grep ^sig | cut -d: -f5 | grep -q $master_key; then
$GPG_CMD --quiet --batch --keyring $ADD_KEYRING --export $add_key | $GPG --import
ADDED=1
fi
done
if [ $ADDED = 0 ]; then
echo >&2 "Key '$add_key' not added. It is not signed with a master key"
fi
done
}
# update the current archive signing keyring from a network URI
# the archive-keyring keys needs to be signed with the master key
# (otherwise it does not make sense from a security POV)
net_update() {
if [ -z "$ARCHIVE_KEYRING_URI" ]; then
echo "ERROR: no location for the archive-keyring given"
fi
if [ ! -d /var/lib/apt/keyrings ]; then
mkdir -p /var/lib/apt/keyrings
fi
keyring=/var/lib/apt/keyrings/$(basename $ARCHIVE_KEYRING)
old_mtime=0
if [ -e $keyring ]; then
old_mtime=$(stat -c %Y $keyring)
fi
(cd /var/lib/apt/keyrings; wget -q -N $ARCHIVE_KEYRING_URI)
if [ ! -e $keyring ]; then
return
fi
new_mtime=$(stat -c %Y $keyring)
if [ $new_mtime -ne $old_mtime ]; then
echo "Checking for new archive signing keys now"
add_keys_with_verify_against_master_keyring $keyring $MASTER_KEYRING
fi
}
update() {
if [ ! -f $ARCHIVE_KEYRING ]; then
echo >&2 "ERROR: Can't find the archive-keyring"
echo >&2 "Is the debian-archive-keyring package installed?"
exit 1
fi
# add new keys from the package;
# we do not use add_keys_with_verify_against_master_keyring here,
# because "update" is run on regular package updates. A
# attacker might as well replace the master-archive-keyring file
# in the package and add his own keys. so this check wouldn't
# add any security. we *need* this check on net-update though
$GPG_CMD --quiet --batch --keyring $ARCHIVE_KEYRING --export | $GPG --import
# remove no-longer supported/used keys
keys=`$GPG_CMD --keyring $REMOVED_KEYS --with-colons --list-keys | grep ^pub | cut -d: -f5`
for key in $keys; do
if $GPG --list-keys --with-colons | grep ^pub | cut -d: -f5 | grep -q $key; then
$GPG --quiet --batch --delete-key --yes ${key}
fi
done
}
usage() {
echo "Usage: apt-key [command] [arguments]"
echo
echo "Manage apt's list of trusted keys"
echo
echo " apt-key add <file> - add the key contained in <file> ('-' for stdin)"
echo " apt-key del <keyid> - remove the key <keyid>"
echo " apt-key export <keyid> - output the key <keyid>"
echo " apt-key exportall - output all trusted keys"
echo " apt-key update - update keys using the keyring package"
echo " apt-key net-update - update keys using the network"
echo " apt-key list - list keys"
echo
}
command="$1"
if [ -z "$command" ]; then
usage
exit 1
fi
shift
if [ "$command" != "help" ] && ! which gpg >/dev/null 2>&1; then
echo >&2 "Warning: gnupg does not seem to be installed."
echo >&2 "Warning: apt-key requires gnupg for most operations."
echo >&2
fi
case "$command" in
add)
$GPG --quiet --batch --import "$1"
echo "OK"
;;
del|rm|remove)
$GPG --quiet --batch --delete-key --yes "$1"
echo "OK"
;;
update)
update
;;
net-update)
net_update
;;
list)
$GPG --batch --list-keys
;;
finger*)
$GPG --batch --fingerprint
;;
export)
$GPG --armor --export "$1"
;;
exportall)
$GPG --armor --export
;;
adv*)
echo "Executing: $GPG $*"
$GPG $*
;;
help)
usage
;;
*)
usage
exit 1
;;
esac
|
