X-Git-Url: http://www.git.cypherpunks.ru/?p=pyderasn.git;a=blobdiff_plain;f=pyderasn.py;h=505f3baafac8516084242256bb12f2633f02ace0;hp=df0eb8f2cabaa46430590bf1bbeeedc231e36d66;hb=bba84f2f3b5fbc860f51cf76f2f504cb2aa8d899;hpb=35c86385b3c8d004e3b5efea7aa2b95e7608309b

diff --git a/pyderasn.py b/pyderasn.py
index df0eb8f..505f3ba 100755
--- a/pyderasn.py
+++ b/pyderasn.py
@@ -1558,6 +1558,8 @@ def tag_strip(data):
             raise DecodeError("unfinished tag")
         if indexbytes(data, i) & 0x80 == 0:
             break
+    if i == 1 and indexbytes(data, 1) < 0x1F:
+        raise DecodeError("unexpected long form")
     if i > 1 and indexbytes(data, 1) & 0x7F == 0:
         raise DecodeError("leading zero byte in tag value")
     i += 1