ALBS-732: pungi: do not build anything if unsigned packages found

pungi/phases/pkgset/pkgsets.py

@@ -22,6 +22,9 @@ It automatically finds a signed copies according to *sigkey_ordering*.
 import itertools
 import json
 import os
+
+import pgpy
+import rpm
 from six.moves import cPickle as pickle
 
 import kobo.log
@@ -493,8 +496,6 @@ class KojiPackageSet(PackageSetBase):
 
         return response
 
-
-
     def get_package_path(self, queue_item):
         rpm_info, build_info = queue_item
 
@@ -849,6 +850,8 @@ class KojiMockPackageSet(PackageSetBase):
         self.extra_builds = extra_builds or []
         self.extra_tasks = extra_tasks or []
         self.reuse = None
+        self.sigkey_ordering = [sigkey.lower() for sigkey in sigkey_ordering] \
+            or [None]
 
     def __getstate__(self):
         result = self.__dict__.copy()
@@ -965,6 +968,20 @@ class KojiMockPackageSet(PackageSetBase):
 
         return response
 
+    def _is_rpm_signed(self, rpm_path) -> bool:
+        ts = rpm.TransactionSet()
+        ts.setVSFlags(rpm._RPMVSF_NOSIGNATURES)
+        with open(rpm_path, 'rb') as fd:
+            header = ts.hdrFromFdno(fd)
+            signature = header[rpm.RPMTAG_SIGGPG] or header[rpm.RPMTAG_SIGPGP]
+            if not signature:
+                return False
+            pgp_msg = pgpy.PGPMessage.from_blob(signature)
+            return any(
+                signature.signer.lower() in self.sigkey_ordering
+                for signature in pgp_msg.signatures
+            )
+
     def get_package_path(self, queue_item):
         rpm_info, build_info = queue_item
 
@@ -982,6 +999,13 @@ class KojiMockPackageSet(PackageSetBase):
 
         rpm_path = os.path.join(pathinfo.topdir, pathinfo.rpm(rpm_info))
         if os.path.isfile(rpm_path):
+            if not self._is_rpm_signed(rpm_path):
+                self._invalid_sigkey_rpms.append(rpm_info)
+                self.log_error(
+                    'RPM "%s" not found for sigs: "%s". Path checked: "%s"',
+                    rpm_info, self.sigkey_ordering, rpm_path
+                )
+                return
             return rpm_path
         else:
             self.log_warning("RPM %s not found" % rpm_path)