X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/b09e09c756861ab167647ec61ac59b85c2928be6..af7a92c35accda98b667ff41f62ea500fca95a7c:/cmdline/apt-key?ds=sidebyside

diff --git a/cmdline/apt-key b/cmdline/apt-key
index d4b61b356..b39ab12e4 100755
--- a/cmdline/apt-key
+++ b/cmdline/apt-key
@@ -1,18 +1,20 @@
 #!/bin/sh
 
 set -e
+unset GREP_OPTIONS
 
 # 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="$GPG_CMD --keyring /etc/apt/trusted.gpg"
+GPG="$GPG_CMD"
 
+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
 
-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/ubuntu-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
@@ -29,16 +31,15 @@ add_keys_with_verify_against_master_keyring() {
 
     # when adding new keys, make sure that the archive-master-keyring
     # is honored. so:
-    #   all keys that are exported and have the name
-    #   "Ubuntu Archive Automatic Signing Key" must have a valid signature
-    #   from a key in the ubuntu-master-keyring
+    #   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 $ARCHIVE_KEYRING --export $add_key | $GPG --import
+		$GPG_CMD --quiet --batch --keyring $ADD_KEYRING --export $add_key | $GPG --import
 		ADDED=1
 	    fi
 	done
@@ -53,42 +54,66 @@ add_keys_with_verify_against_master_keyring() {
 # (otherwise it does not make sense from a security POV)
 net_update() {
     if [ -z "$ARCHIVE_KEYRING_URI" ]; then
-	echo "ERROR: no location for the archive-keyring given" 
+	echo "ERROR: no location for the archive-keyring given"
+	exit 1
+    fi
+    # 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 "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
     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 $ARCHIVE_KEYRING_URI)
-    add_keys_with_verify_against_master_keyring /var/lib/apt/keyrings/$(basename $ARCHIVE_KEYRING) $MASTER_KEYRING
+    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 ubuntu-keyring package installed?"
+	echo >&2 "Is the debian-archive-keyring package installed?"
 	exit 1
     fi
 
-    # add new keys, if no MASTER_KEYRING is used, use the traditional
-    # way
-    if [ -z "$MASTER_KEYRING" ]; then
-	$GPG_CMD --quiet --batch --keyring $ARCHIVE_KEYRING --export | $GPG --import
+    # 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 | $GPG --import
+
+    if [ -r "$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
-	add_keys_with_verify_against_master_keyring $ARCHIVE_KEYRING $MASTER_KEYRING
+	echo "Warning: removed keys keyring  $REMOVED_KEYS missing or not readable" >&2
     fi
-
-    # remove no-longer supported/used keys
-    keys=`$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 "Usage: apt-key [--keyring file] [command] [arguments]"
     echo
     echo "Manage apt's list of trusted keys"
     echo
@@ -99,9 +124,46 @@ usage() {
     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 "  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" ]; 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