Bugs item #1471372, was opened at 2006-04-17 03:13
Message generated for change (Comment added) made by eocsor
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: Bug in AllOrNothing transform.
Initial Comment:
(I think I've got the following right, forgive me if
it's a mistake on my part. I'm still new to all this :)
In Crypto.Protocol.AllOrNothing the digest method will
create blocks of invalid size 0.3-0.4% of the time for
random input cases.
The reason for this a long_to_bytes() call without the
blocksize parameter specified, which defaults to zero.
Included is a patch.
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Comment By: Roscoe (eocsor)
Date: 2006-04-17 03:20
Message:
Logged In: YES
user_id=1503309
Opps. Forgot to check I was logged in.
'''
--- AllOrNothing.py 2006-04-17 02:25:24.000000000 +0930
+++ fixedAllOrNothing.py 2006-04-17
03:00:40.000000000 +0930
@@ -139,7 +139,7 @@
# we convert the blocks to strings since in Python,
byte sequences are
# always represented as strings. This is more
consistent with the
# model that encryption and hash algorithms always
operate on strings.
- return map(long_to_bytes, blocks)
+ return
[long_to_bytes(i,self.__ciphermodule.block_size) for i in
blocks]
def undigest(self, blocks):
'''
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