require to be root for add, rm, update and net-update

1 files changed, 11 insertions, 0 deletions

diff --git a/cmdline/apt-key b/cmdline/apt-key
index 86e982054..843163f82 100755
--- a/cmdline/apt-key
+++ b/cmdline/apt-key
@@ -21,6 +21,13 @@ ARCHIVE_KEYRING_URI=""
 ARCHIVE_KEYRING=/usr/share/keyrings/debian-archive-keyring.gpg
 REMOVED_KEYS=/usr/share/keyrings/debian-archive-removed-keys.gpg
 
+requires_root() {
+	if [ "$(id -u)" -ne 0 ]; then
+		echo >&1 "ERROR: This command can only be used by root."
+		exit 1
+	fi
+}
+
 add_keys_with_verify_against_master_keyring() {
     ADD_KEYRING=$1
     MASTER=$2
@@ -62,6 +69,7 @@ net_update() {
 	echo >&2 "ERROR: Your distribution is not supported in net-update as no uri for the archive-keyring is set"
 	exit 1
     fi
+    requires_root
     # in theory we would need to depend on wget for this, but this feature
     # isn't useable in debian anyway as we have no keyring uri nor a master key
     if ! which wget >/dev/null 2>&1; then
@@ -93,6 +101,7 @@ update() {
 	echo >&2 "Is the debian-archive-keyring package installed?"
 	exit 1
     fi
+    requires_root
 
     # add new keys from the package;
 
@@ -184,10 +193,12 @@ fi
 
 case "$command" in
     add)
+        requires_root
         $GPG --quiet --batch --import "$1"
         echo "OK"
         ;;
     del|rm|remove)
+        requires_root
         $GPG --quiet --batch --delete-key --yes "$1"
         echo "OK"
         ;;