test/py: efi_secboot: add a test against certificate revocation

Revocation database (dbx) may have not only certificates, but also
message digests of certificates with revocation time
(EFI_CERT_X509_SHA256_GUILD).

In this test case, if the database has such a digest and if the value
matches to a certificate that created a given image's signature,
authentication should fail.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>

Set defined time stamp for dbx_hash.auth.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/test/py/tests/test_efi_secboot/conftest.py b/test/py/tests/test_efi_secboot/conftest.py
index c0ee8be..c3d5662 100644
--- a/test/py/tests/test_efi_secboot/conftest.py
+++ b/test/py/tests/test_efi_secboot/conftest.py
@@ -106,12 +106,16 @@
         # db1-update
         check_call('cd %s; %ssign-efi-sig-list -t "2020-04-06" -a -c KEK.crt -k KEK.key db db1.esl db1-update.auth'
                    % (mnt_point, EFITOOLS_PATH), shell=True)
-        # dbx
+        ## dbx (TEST_dbx certificate)
         check_call('cd %s; openssl req -x509 -sha256 -newkey rsa:2048 -subj /CN=TEST_dbx/ -keyout dbx.key -out dbx.crt -nodes -days 365'
                    % mnt_point, shell=True)
         check_call('cd %s; %scert-to-efi-sig-list -g %s dbx.crt dbx.esl; %ssign-efi-sig-list -t "2020-04-05" -c KEK.crt -k KEK.key dbx dbx.esl dbx.auth'
                    % (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH),
                    shell=True)
+        ## dbx_hash (digest of TEST_db certificate)
+        check_call('cd %s; %scert-to-efi-hash-list -g %s -t 0 -s 256 db.crt dbx_hash.crl; %ssign-efi-sig-list -t "2020-04-05" -c KEK.crt -k KEK.key dbx dbx_hash.crl dbx_hash.auth'
+                   % (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH),
+                   shell=True)
 
         # Copy image
         check_call('cp %s %s' % (HELLO_PATH, mnt_point), shell=True)