Implement gpgv --assert-pubkey-algo=>=rsa2048,ed25519,ed448

The assertion can be overriden using apt::key::assert-pubkey-algo,
the default is the most opinionated one.

This will inform the user during apt-cdrom add as we do not
pass --quiet to user, so adjust test case.

Add a simple test case for it to test-method-gpgv.

LP: #2055193

2 files changed, 35 insertions, 2 deletions

diff --git a/test/integration/test-apt-cdrom b/test/integration/test-apt-cdrom
index 01680c461..e8ccb10a4 100755
--- a/test/integration/test-apt-cdrom
+++ b/test/integration/test-apt-cdrom
@@ -40,6 +40,24 @@ aptcdromlog() {
 }
 aptautotest_aptcdromlog_add() { aptautotest_aptget_update "$@"; }
 
+
+msgtest "Checking --assert-pubkey-algo support"
+gpgv_msg=""
+test="$(LC_ALL=C.UTF-8 gpgv --assert-pubkey-algo 2>&1 || :)"
+case "$test" in
+	*"missing argument"*)
+		gpgv_msg="
+gpgv: asserted signer '34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE' with algo rsa2048"
+		msgpass
+		;;
+	*[Ii]"nvalid option"*"assert-pubkey-algo"*)
+		msgskip
+		;;
+	*)
+		msgfail "Unknown response from gpgv to --assert-pubkey-algo check: $test"
+		;;
+esac
+
 CDROM_PRE="Using CD-ROM mount point $(readlink -f ./rootdir/media)/cdrom/
 Unmounting CD-ROM...
 Waiting for disc...
@@ -47,7 +65,7 @@ Please insert a Disc in the drive and press [Enter]
 Mounting CD-ROM...
 Scanning disc for index files..."
 CDROM_POST="This disc is called: 
-'Debian APT Testdisk 0.8.15'
+'Debian APT Testdisk 0.8.15'$gpgv_msg
 Writing new source list
 Source list entries for this disc are:
 deb cdrom:[Debian APT Testdisk 0.8.15]/ stable main
diff --git a/test/integration/test-method-gpgv b/test/integration/test-method-gpgv
index 99bffd6ab..4fd72d256 100755
--- a/test/integration/test-method-gpgv
+++ b/test/integration/test-method-gpgv
@@ -41,6 +41,13 @@ testrun() {
 	testgpgv 'Good signed with fingerprint' 'Good: GOODSIG 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE' '34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE!' '[GNUPG:] GOODSIG 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE Joe Sixpack (APT Testcases Dummy) <joe@example.org>
 [GNUPG:] VALIDSIG 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE 2016-09-01 1472742625 0 4 0 1 11 00 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE'
 
+	testgpgv 'Good signed with long keyid and asserted' 'Good: GOODSIG 5A90D141DBAC8DAE' '34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE!' '[GNUPG:] GOODSIG 5A90D141DBAC8DAE Joe Sixpack (APT Testcases Dummy) <joe@example.org>
+[GNUPG:] VALIDSIG 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE 2016-09-01 1472742625 0 4 0 1 11 00 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE
+[GNUPG:] ASSERT_PUBKEY_ALGO 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE 1 rsa1024'
+	testgpgv 'Good signed with fingerprint and asserted' 'Good: GOODSIG 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE' '34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE!' '[GNUPG:] GOODSIG 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE Joe Sixpack (APT Testcases Dummy) <joe@example.org>
+[GNUPG:] VALIDSIG 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE 2016-09-01 1472742625 0 4 0 1 11 00 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE
+[GNUPG:] ASSERT_PUBKEY_ALGO 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE 1 rsa1024'
+
 	testgpgv 'Good subkey signed with long keyid' 'Good: GOODSIG 5B6896415D44C43E' '34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE, 4281DEDBD466EAE8C1F4157E5B6896415D44C43E!' '[GNUPG:] GOODSIG 5B6896415D44C43E Sebastian Subkey <subkey@example.org>
 [GNUPG:] VALIDSIG 4281DEDBD466EAE8C1F4157E5B6896415D44C43E 2018-08-16 1534459673 0 4 0 1 11 00 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE'
 	testgpgv 'Good subkey signed with fingerprint' 'Good: GOODSIG 4281DEDBD466EAE8C1F4157E5B6896415D44C43E' '34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE, 4281DEDBD466EAE8C1F4157E5B6896415D44C43E!' '[GNUPG:] GOODSIG 4281DEDBD466EAE8C1F4157E5B6896415D44C43E Sebastian Subkey <subkey@example.org>
@@ -48,12 +55,20 @@ testrun() {
 
 	testgpgv 'Untrusted signed with long keyid' 'Worthless: 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE, ' '' '[GNUPG:] GOODSIG 5A90D141DBAC8DAE Joe Sixpack (APT Testcases Dummy) <joe@example.org>
 [GNUPG:] VALIDSIG 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE 2016-09-01 1472742625 0 4 0 1 1 00 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE'
-    exit
 	testsuccess grep '^\s\+Good:\s\+$' method.output
 	testgpgv 'Untrusted signed with fingerprint' 'Worthless: 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE, ' '' '[GNUPG:] GOODSIG 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE Joe Sixpack (APT Testcases Dummy) <joe@example.org>
 [GNUPG:] VALIDSIG 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE 2016-09-01 1472742625 0 4 0 1 1 00 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE'
 	testsuccess grep '^\s\+Good:\s\+$' method.output
 
+	testgpgv 'Unasserted signed with long keyid' 'Worthless: 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE, ' '' '[GNUPG:] GOODSIG 5A90D141DBAC8DAE Joe Sixpack (APT Testcases Dummy) <joe@example.org>
+[GNUPG:] VALIDSIG 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE 2016-09-01 1472742625 0 4 0 1 11 00 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE
+[GNUPG:] ASSERT_PUBKEY_ALGO 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE 0 rsa1024'
+	testsuccess grep '^\s\+Good:\s\+$' method.output
+	testgpgv 'Unaserted signed with fingerprint' 'Worthless: 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE, ' '' '[GNUPG:] GOODSIG 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE Joe Sixpack (APT Testcases Dummy) <joe@example.org>
+[GNUPG:] VALIDSIG 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE 2016-09-01 1472742625 0 4 0 1 11 00 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE
+[GNUPG:] ASSERT_PUBKEY_ALGO 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE 0 rsa1024'
+	testsuccess grep '^\s\+Good:\s\+$' method.output
+
 	testgpgv 'Weak signed with long keyid' 'Good: GOODSIG 5A90D141DBAC8DAE' '34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE!' '[GNUPG:] GOODSIG 5A90D141DBAC8DAE Joe Sixpack (APT Testcases Dummy) <joe@example.org>
 [GNUPG:] VALIDSIG 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE 2016-09-01 1472742625 0 4 0 1 2 00 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE'
 	testsuccess grep '^Message: Signature by key 34A8E9D18DB320F367E8EAA05A90D141DBAC8DAE uses weak digest algorithm (SHA1)$' method.output