Add checkDigest function.

pym/cl_utils.py

@@ -724,3 +724,18 @@ def removeProgramToEnvFile(nameProg, objVar):
     if not objVar.WriteList("cl_merges", force=True):
         return False
     return True
+
+def checkDigestFile(digestfile):
+    """Check digest by digestfile"""
+    reEntry = re.compile(r"# (\S+) HASH\n(\S+)  (\S+)",re.S)
+    result = []
+    for alg,hashdata,filename in \
+        reEntry.findall(open(digestfile,'r').read()):
+        if hasattr(hashlib,alg.lower()):
+            hashobj = getattr(hashlib,alg.lower())
+            filename = path.join(path.dirname(digestfile),filename)
+            if path.exists(filename):
+                digest = hashobj(open(filename,'r').read())
+                result.append((alg,
+                    digest.hexdigest().upper() == hashdata.upper()))
+    return result