don't show NO_PUBKEY warning if repo is signed by another key

Daniel Kahn Gillmor highlights in the bugreport that security isn't
improving by having the user import additional keys – especially as
importing keys securely is hard.

The bugreport was initially about dropping the warning to a notice, but
in given the previously mentioned observation and the fact that we
weren't printing a warning (or a notice) for expired or revoked keys
providing a signature we drop it completely as the code to display a
message if this was the only key is in another path – and is considered
critical.

Closes: 618445

1 files changed, 30 insertions, 1 deletions

diff --git a/test/integration/test-releasefile-verification b/test/integration/test-releasefile-verification
index a061832b6..5da0a8292 100755
--- a/test/integration/test-releasefile-verification
+++ b/test/integration/test-releasefile-verification
@@ -127,7 +127,7 @@ runtest() {
 	testsuccessequal "$(cat "${PKGFILE}")
 " aptcache show apt
 	failaptold
-	rm rootdir/etc/apt/trusted.gpg.d/rexexpired.gpg
+	rm -f rootdir/etc/apt/trusted.gpg.d/rexexpired.gpg
 
 	msgmsg 'Cold archive expired signed by' 'Joe Sixpack'
 	if dpkg --compare-versions "$(aptkey adv --version | head -n 2 | tail -n 1 | cut -d' ' -f 3)" '>=' '2.1' >/dev/null 2>&1; then
@@ -152,6 +152,28 @@ runtest() {
 		msgskip 'Not a new enough gpg available providing --fake-system-time'
 	fi
 
+	msgmsg 'Cold archive signed by' 'Joe Sixpack,Marvin Paranoid'
+	prepare "${PKGFILE}"
+	rm -rf rootdir/var/lib/apt/lists
+	signreleasefiles 'Joe Sixpack,Marvin Paranoid'
+	find aptarchive/ -name "$DELETEFILE" -delete
+	successfulaptgetupdate 'NO_PUBKEY'
+	testsuccessequal "$(cat "${PKGFILE}")
+" aptcache show apt
+	installaptold
+
+	msgmsg 'Cold archive signed by' 'Joe Sixpack,Rex Expired'
+	prepare "${PKGFILE}"
+	rm -rf rootdir/var/lib/apt/lists
+	signreleasefiles 'Joe Sixpack,Rex Expired'
+	find aptarchive/ -name "$DELETEFILE" -delete
+	cp keys/rexexpired.pub rootdir/etc/apt/trusted.gpg.d/rexexpired.gpg
+	successfulaptgetupdate 'EXPKEYSIG'
+	rm -f rootdir/etc/apt/trusted.gpg.d/rexexpired.gpg
+	testsuccessequal "$(cat "${PKGFILE}")
+" aptcache show apt
+	installaptold
+
 	msgmsg 'Cold archive signed by' 'Marvin Paranoid'
 	prepare "${PKGFILE}"
 	rm -rf rootdir/var/lib/apt/lists
@@ -302,11 +324,18 @@ export APT_TESTS_DIGEST_ALGO='SHA224'
 
 successfulaptgetupdate() {
 	testsuccess aptget update -o Debug::pkgAcquire::Worker=1 -o Debug::Acquire::gpgv=1
+	if [ -n "$1" ]; then
+		cp rootdir/tmp/testsuccess.output aptupdate.output
+		testsuccess grep "$1" aptupdate.output
+	fi
 }
 runtest3 'Trusted'
 
 successfulaptgetupdate() {
 	testwarning aptget update -o Debug::pkgAcquire::Worker=1 -o Debug::Acquire::gpgv=1
+	if [ -n "$1" ]; then
+		testsuccess grep "$1" rootdir/tmp/testwarning.output
+	fi
 	testsuccess grep 'uses weak digest algorithm' rootdir/tmp/testwarning.output
 }
 runtest3 'Weak'