AF_ALG data chunk size

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hello,

i'm playing a bit with AF_ALG and found a strange problem: it looks like
big data chunks (64K) can lead to error.


what i do:
1. take a file, read some data (8 or 64K), encrypt, write to
crypted-file, repeat until EOF.
2. read crypted-file, with the same chunk size, decrypt, write to
result-file, repeat until EOF.
3. compare results, and they equal for 8K block size, but differ for 64K
block size. to feed data - i use sendmsg/read calls.


steps to reproduce:
1. clone code from [1]
2. vim crypto.cpp
3. edit read_size to `64 * 1024`
4. make
5. ./test.sh
6. show bug place: xxd crypto X-1; xxd L-decrypt X-2; vimdiff X-1 X-2


system information:
kernel 3.15/x86_64
gcc 4.8.2

[1] - https://github.com/urykhy/avoidSSL

ps: please, CC'me on reply

-- 
Linux registered user #402966 // pub 1024D/E99AF373 <pgp.mit.edu>
--
To unsubscribe from this list: send the line "unsubscribe linux-crypto" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Kernel]     [Gnu Classpath]     [Gnu Crypto]     [DM Crypt]     [Netfilter]     [Bugtraq]

  Powered by Linux