[OE-core] [RFC PATCH 2/3] classes/sstate: don't use unsigned sstate when verification enabled

[Joshua Lock]

When signature verification of shared state objects is enabled
(SSTATE_VERIFY_SIG) use of an unsigned object, even though it produces a
warning, seems unexpected. Instead skip unsigned objects and force the
non-accelerated task to be run.

Signed-off-by: Joshua Lock <jlock at vmware.com>
---
 meta/classes/sstate.bbclass | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/meta/classes/sstate.bbclass b/meta/classes/sstate.bbclass
index d8fdcece6a..3342c5ef50 100644
--- a/meta/classes/sstate.bbclass
+++ b/meta/classes/sstate.bbclass
@@ -340,7 +340,8 @@ def sstate_installpkg(ss, d):
     if bb.utils.to_boolean(d.getVar("SSTATE_VERIFY_SIG"), False):
         signer = get_signer(d, 'local')
         if not signer.verify(sstatepkg + '.sig'):
-            bb.warn("Cannot verify signature on sstate package %s" % sstatepkg)
+            bb.warn("Cannot verify signature on sstate package %s, skipping acceleration..." % sstatepkg)
+            return False
 
     # Empty sstateinst directory, ensure its clean
     if os.path.exists(sstateinst):
-- 
2.21.0