X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/de4e6f6b78154cf2c4afea4aea74b5bca3fba96f..66706285737a895d0baf64c2387c58d5211be4f9:/cmdline/apt-key?ds=sidebyside

diff --git a/cmdline/apt-key b/cmdline/apt-key
index 7bb30240e..2c087acbc 100755
--- a/cmdline/apt-key
+++ b/cmdline/apt-key
@@ -5,10 +5,17 @@ unset GREP_OPTIONS
 
 # We don't use a secret keyring, of course, but gpg panics and
 # implodes if there isn't one available
+SECRETKEYRING="$(mktemp)"
+trap "rm -f '${SECRETKEYRING}'" 0 HUP INT QUIT ILL ABRT FPE SEGV PIPE TERM
+GPG_CMD="gpg --ignore-time-conflict --no-options --no-default-keyring --secret-keyring ${SECRETKEYRING}"
 
-GPG_CMD="gpg --ignore-time-conflict --no-options --no-default-keyring --secret-keyring /etc/apt/secring.gpg --trustdb-name /etc/apt/trustdb.gpg"
-GPG="$GPG_CMD --keyring /etc/apt/trusted.gpg"
+if [ "$(id -u)" -eq 0 ]; then
+	# we could use a tmpfile here too, but creation of this tends to be time-consuming
+	eval $(apt-config shell TRUSTDBDIR Dir::Etc/d)
+	GPG_CMD="$GPG_CMD --trustdb-name ${TRUSTDBDIR}/trustdb.gpg"
+fi
 
+GPG="$GPG_CMD"
 
 MASTER_KEYRING=""
 ARCHIVE_KEYRING_URI=""
@@ -18,6 +25,23 @@ 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 [ "$(id -u)" -ne 0 ]; then
+		echo >&1 "ERROR: This command can only be used by root."
+		exit 1
+	fi
+}
+
+# gpg defaults to mode 0600 for new keyrings. Create one with 0644 instead.
+init_keyring() {
+    for path; do
+        if ! [ -e "$path" ]; then
+            touch -- "$path"
+            chmod 0644 -- "$path"
+        fi
+    done
+}
+
 add_keys_with_verify_against_master_keyring() {
     ADD_KEYRING=$1
     MASTER=$2
@@ -56,7 +80,15 @@ add_keys_with_verify_against_master_keyring() {
 # (otherwise it does not make sense from a security POV)
 net_update() {
     if [ -z "$ARCHIVE_KEYRING_URI" ]; then
-	echo "ERROR: no location for the archive-keyring given" 
+	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
+	echo >&2 "ERROR: an installed wget is required for a network-based update"
+	exit 1
     fi
     if [ ! -d /var/lib/apt/keyrings ]; then
 	mkdir -p /var/lib/apt/keyrings
@@ -83,6 +115,7 @@ update() {
 	echo >&2 "Is the debian-archive-keyring package installed?"
 	exit 1
     fi
+    requires_root
 
     # add new keys from the package;
 
@@ -93,18 +126,22 @@ update() {
     # 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 ${key}
-	fi
-    done
+    if [ -r "$REMOVED_KEYS" ]; then
+	# 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
+    else
+	echo "Warning: removed keys keyring  $REMOVED_KEYS missing or not readable" >&2
+    fi
 }
 
 
 usage() {
-    echo "Usage: apt-key [command] [arguments]"
+    echo "Usage: apt-key [--keyring file] [command] [arguments]"
     echo
     echo "Manage apt's list of trusted keys"
     echo
@@ -118,8 +155,43 @@ usage() {
     echo "  apt-key finger              - list fingerprints"
     echo "  apt-key adv                 - pass advanced options to gpg (download key)"
     echo
+    echo "If no specific keyring file is given the command applies to all keyring files."
 }
 
+# Determine on which keyring we want to work
+if [ "$1" = "--keyring" ]; then
+        #echo "keyfile given"
+	shift
+	TRUSTEDFILE="$1"
+	if [ -r "$TRUSTEDFILE" ] || [ "$2" = 'add' ] || [ "$2" = 'adv' ]; then
+		GPG="$GPG --keyring $TRUSTEDFILE --primary-keyring $TRUSTEDFILE"
+	else
+		echo >&2 "Error: The specified keyring »$TRUSTEDFILE« is missing or not readable"
+		exit 1
+	fi
+	shift
+# otherwise use the default
+else
+	#echo "generate list"
+	TRUSTEDFILE="/etc/apt/trusted.gpg"
+	eval $(apt-config shell TRUSTEDFILE Apt::GPGV::TrustedKeyring)
+	eval $(apt-config shell TRUSTEDFILE Dir::Etc::Trusted/f)
+	if [ -r "$TRUSTEDFILE" ]; then
+		GPG="$GPG --keyring $TRUSTEDFILE"
+	fi
+	GPG="$GPG --primary-keyring $TRUSTEDFILE"
+	TRUSTEDPARTS="/etc/apt/trusted.gpg.d"
+	eval $(apt-config shell TRUSTEDPARTS Dir::Etc::TrustedParts/d)
+	if [ -d "$TRUSTEDPARTS" ]; then
+		#echo "parts active"
+		for trusted in $(run-parts --list $TRUSTEDPARTS --regex '^.*\.gpg$'); do
+			#echo "part -> $trusted"
+			GPG="$GPG --keyring $trusted"
+		done
+	fi
+fi
+#echo "COMMAND: $GPG"
+
 command="$1"
 if [ -z "$command" ]; then
     usage
@@ -135,32 +207,43 @@ fi
 
 case "$command" in
     add)
+        requires_root
+        init_keyring "$TRUSTEDFILE"
         $GPG --quiet --batch --import "$1"
         echo "OK"
         ;;
     del|rm|remove)
+        requires_root
+        init_keyring "$TRUSTEDFILE"
         $GPG --quiet --batch --delete-key --yes "$1"
         echo "OK"
         ;;
     update)
+        init_keyring "$TRUSTEDFILE"
 	update
 	;;
     net-update)
+        init_keyring "$TRUSTEDFILE"
 	net_update
 	;;
     list)
+        init_keyring "$TRUSTEDFILE"
         $GPG --batch --list-keys
         ;;
     finger*)
+        init_keyring "$TRUSTEDFILE"
         $GPG --batch --fingerprint
         ;;
     export)
+        init_keyring "$TRUSTEDFILE"
         $GPG --armor --export "$1"
         ;;
     exportall)
+        init_keyring "$TRUSTEDFILE"
         $GPG --armor --export
         ;;
     adv*)
+        init_keyring "$TRUSTEDFILE"
         echo "Executing: $GPG $*"
         $GPG $*
         ;;