1 files changed, 72 insertions, 0 deletions
diff --git a/utils/checkpackagelib/lib_hash.py b/utils/checkpackagelib/lib_hash.py
new file mode 100644
index 0000000000..10b27482bc
--- /dev/null
+++ b/utils/checkpackagelib/lib_hash.py
@@ -0,0 +1,72 @@
+# See utils/checkpackagelib/readme.txt before editing this file.
+# The validity of the hashes itself is checked when building, so below check
+# functions don't need to check for things already checked by running
+# "make package-dirclean package-source".
+
+import re
+
+from base import _CheckFunction
+# Notice: ignore 'imported but unused' from pyflakes for check functions.
+from lib import ConsecutiveEmptyLines
+from lib import EmptyLastLine
+from lib import NewlineAtEof
+from lib import TrailingSpace
+
+
+def _empty_line_or_comment(text):
+    return text.strip() == "" or text.startswith("#")
+
+
+class HashFilename(_CheckFunction):
+    def check_line(self, lineno, text):
+        if _empty_line_or_comment(text):
+            return
+
+        fields = text.split()
+        if len(fields) < 3:
+            return
+
+        if '/' in fields[2]:
+            return ["{}:{}: use filename without directory component"
+                    " ({}#adding-packages-hash)"
+                    .format(self.filename, lineno, self.url_to_manual),
+                    text]
+
+
+class HashNumberOfFields(_CheckFunction):
+    def check_line(self, lineno, text):
+        if _empty_line_or_comment(text):
+            return
+
+        fields = text.split()
+        if len(fields) != 3:
+            return ["{}:{}: expected three fields ({}#adding-packages-hash)"
+                    .format(self.filename, lineno, self.url_to_manual),
+                    text]
+
+
+class HashType(_CheckFunction):
+    len_of_hash = {"md5": 32, "sha1": 40, "sha224": 56, "sha256": 64,
+                   "sha384": 96, "sha512": 128}
+
+    def check_line(self, lineno, text):
+        if _empty_line_or_comment(text):
+            return
+
+        fields = text.split()
+        if len(fields) < 2:
+            return
+
+        htype, hexa = fields[:2]
+        if htype == "none":
+            return
+        if htype not in self.len_of_hash.keys():
+            return ["{}:{}: unexpected type of hash ({}#adding-packages-hash)"
+                    .format(self.filename, lineno, self.url_to_manual),
+                    text]
+        if not re.match("^[0-9A-Fa-f]{%s}$" % self.len_of_hash[htype], hexa):
+            return ["{}:{}: hash size does not match type "
+                    "({}#adding-packages-hash)"
+                    .format(self.filename, lineno, self.url_to_manual),
+                    text,
+                    "expected {} hex digits".format(self.len_of_hash[htype])]