diff --git a/poky/bitbake/lib/bb/siggen.py b/poky/bitbake/lib/bb/siggen.py
index 352dcab..09c9c8a 100644
--- a/poky/bitbake/lib/bb/siggen.py
+++ b/poky/bitbake/lib/bb/siggen.py
@@ -41,6 +41,9 @@
     def finalise(self, fn, d, varient):
         return
 
+    def get_unihash(self, task):
+        return self.taskhash[task]
+
     def get_taskhash(self, fn, task, deps, dataCache):
         return "0"
 
@@ -87,7 +90,7 @@
         self.taints = {}
         self.gendeps = {}
         self.lookupcache = {}
-        self.pkgnameextract = re.compile("(?P<fn>.*)\..*")
+        self.pkgnameextract = re.compile(r"(?P<fn>.*)\..*")
         self.basewhitelist = set((data.getVar("BB_HASHBASE_WHITELIST") or "").split())
         self.taskwhitelist = None
         self.init_rundepcheck(data)
@@ -188,7 +191,7 @@
                 continue
             if dep not in self.taskhash:
                 bb.fatal("%s is not in taskhash, caller isn't calling in dependency order?" % dep)
-            data = data + self.taskhash[dep]
+            data = data + self.get_unihash(dep)
             self.runtaskdeps[k].append(dep)
 
         if task in dataCache.file_checksums[fn]:
@@ -215,7 +218,7 @@
             self.taints[k] = taint
             logger.warning("%s is tainted from a forced run" % k)
 
-        h = hashlib.md5(data.encode("utf-8")).hexdigest()
+        h = hashlib.sha256(data.encode("utf-8")).hexdigest()
         self.taskhash[k] = h
         #d.setVar("BB_TASKHASH_task-%s" % task, taskhash[task])
         return h
@@ -263,7 +266,7 @@
             data['file_checksum_values'] = [(os.path.basename(f), cs) for f,cs in self.file_checksum_values[k]]
             data['runtaskhashes'] = {}
             for dep in data['runtaskdeps']:
-                data['runtaskhashes'][dep] = self.taskhash[dep]
+                data['runtaskhashes'][dep] = self.get_unihash(dep)
             data['taskhash'] = self.taskhash[k]
 
         taint = self.read_taint(fn, task, referencestamp)
@@ -313,6 +316,13 @@
 class SignatureGeneratorBasicHash(SignatureGeneratorBasic):
     name = "basichash"
 
+    def get_stampfile_hash(self, task):
+        if task in self.taskhash:
+            return self.taskhash[task]
+
+        # If task is not in basehash, then error
+        return self.basehash[task]
+
     def stampfile(self, stampbase, fn, taskname, extrainfo, clean=False):
         if taskname != "do_setscene" and taskname.endswith("_setscene"):
             k = fn + "." + taskname[:-9]
@@ -320,11 +330,9 @@
             k = fn + "." + taskname
         if clean:
             h = "*"
-        elif k in self.taskhash:
-            h = self.taskhash[k]
         else:
-            # If k is not in basehash, then error
-            h = self.basehash[k]
+            h = self.get_stampfile_hash(k)
+
         return ("%s.%s.%s.%s" % (stampbase, taskname, h, extrainfo)).rstrip('.')
 
     def stampcleanmask(self, stampbase, fn, taskname, extrainfo):
@@ -644,7 +652,7 @@
         if val is not None:
             basedata = basedata + str(val)
 
-    return hashlib.md5(basedata.encode("utf-8")).hexdigest()
+    return hashlib.sha256(basedata.encode("utf-8")).hexdigest()
 
 def calc_taskhash(sigdata):
     data = sigdata['basehash']
@@ -662,7 +670,7 @@
         else:
             data = data + sigdata['taint']
 
-    return hashlib.md5(data.encode("utf-8")).hexdigest()
+    return hashlib.sha256(data.encode("utf-8")).hexdigest()
 
 
 def dump_sigfile(a):