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-rwxr-xr-xcmdline/apt-key27
1 files changed, 20 insertions, 7 deletions
diff --git a/cmdline/apt-key b/cmdline/apt-key
index 4d2b7c49f..7bfe47fca 100755
--- a/cmdline/apt-key
+++ b/cmdline/apt-key
@@ -22,7 +22,7 @@ MASTER_KEYRING=/usr/share/keyrings/ubuntu-master-keyring.gpg
ARCHIVE_KEYRING=/usr/share/keyrings/ubuntu-archive-keyring.gpg
REMOVED_KEYS=/usr/share/keyrings/ubuntu-archive-removed-keys.gpg
ARCHIVE_KEYRING_URI=http://archive.ubuntu.com/ubuntu/project/ubuntu-archive-keyring.gpg
-
+TMP_KEYRING=/var/lib/apt/keyrings/maybe-import-keyring.gpg
requires_root() {
if [ "$(id -u)" -ne 0 ]; then
@@ -34,7 +34,7 @@ requires_root() {
add_keys_with_verify_against_master_keyring() {
ADD_KEYRING=$1
MASTER=$2
-
+
if [ ! -f "$ADD_KEYRING" ]; then
echo "ERROR: '$ADD_KEYRING' not found"
return
@@ -50,11 +50,25 @@ add_keys_with_verify_against_master_keyring() {
# 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
+
+ # ensure there are no colisions LP: #857472
+ for master_key in $master_keys; do
+ if [ "$add_key" = "$master_key" ]; then
+ echo >&2 "Keyid collision for '$add_key' detected, operation aborted"
+ return 1
+ fi
+ done
+
+ # export the add keyring one-by-one
+ rm -f $TMP_KEYRING
+ $GPG_CMD --keyring $ADD_KEYRING --output $TMP_KEYRING --export $add_key
+ # check if signed with the master key and only add in this case
+ 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
+ if $GPG_CMD --keyring $MASTER --keyring $TMP_KEYRING --check-sigs --with-colons $add_key | grep '^sig:!:' | cut -d: -f5 | grep -q $master_key; then
+ $GPG --import $TMP_KEYRING
ADDED=1
fi
done
@@ -62,14 +76,13 @@ add_keys_with_verify_against_master_keyring() {
echo >&2 "Key '$add_key' not added. It is not signed with a master key"
fi
done
+ rm -f $TMP_KEYRING
}
# update the current archive signing keyring from a network URI
# the archive-keyring keys needs to be signed with the master key
# (otherwise it does not make sense from a security POV)
net_update() {
- # Disabled for now as code is insecure
- exit 1
if [ -z "$ARCHIVE_KEYRING_URI" ]; then
echo >&2 "ERROR: Your distribution is not supported in net-update as no uri for the archive-keyring is set"