Hi Margarita,
Margarita Manterola <ma...@debian.org> writes:
> Please respect the original author indenting style.
There hardly is such a thing. The source code as-is uses different
indenting styles. But that is a minor nitpick not worthy of
discussion. Feel free to change my patch as you see fit.
> This should be perror("open(outfile)");
Correct.
> + } else {
> + if ((sz = BFDecrypt(infd, outfd, key, key2, &options)) == 0) {
> fprintf(stderr, "Invalid encryption key for file: %s\n", infile);
> exit(1);
> }
> + ftruncate(outfd, sz);
> + }
>
> What's the point of the truncate there?
Since I don’t do all the processing in memory anymore, I cannot truncate
the file in memory (as the old code did). Therefore I just write the key
+ padding block to the output file and then truncate it. There is a
comment in the decryption function which explains how to improve this
situation, but since that is not really related to this issue, I didn’t
spend any time on that.
> For the complicated part, I would need more time to review it, but I think
> it's a too disruptive change to make it into wheezy's release. It's
> basically a complete refactor of the whole encryption/decryption
> functions.
I agree that this is a large change. I tried to convince you that the
change is alright by providing a fuzzing-style automated testing script
which ran on my machine for thousands of iterations and did not find any
regressions.
I have to wonder: Since you seem opposed to fixing this for wheezy, why
did you not update your bugreport accordingly so that my — apparently
unnecessary and useless — work could have been prevented? It cost me
many hours to work on this.
> Also, I'm really not sure it makes much sense to have this tool. It could
> easily be replaced by a shell script that calls openssl and shred
> appropriately.
I do agree, but that would break at least around 300 installations
(according to popcon). Consider that bcrypt could be part of custom
backup scripts.
In case you want to provide a wrapper script which is binary-compatible
with the original file format, feel free, but I think that is definitely
a too large change for wheezy either ;-).
--
Best regards,
Michael
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