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<p>Hello again,</p>
<p>I did my research and I was able to rewrite the <a
moz-do-not-send="true"
href="https://github.com/TheDcoder/torhash/tree/openssl">code</a>
(branched as openssl) using OpenSSL's libcrypto for hashing, but I
was unsatisfied due to a few reasons which I think are not worth
mentioning (mainly how libcrypto's API is designed and its
dependencies).</p>
<p>After some more looking around for a good cryptography library, I
found LibTomCrypt which sounded just like what I was looking
for... and I was right! It is what I was looking for, it has
minimal dependencies and is cross-platform. The API is also much
simpler and cleaner (IMHO) than libcrypto. So I went ahead and <a
moz-do-not-send="true"
href="https://github.com/TheDcoder/torhash/commit/d0bef22e4ac48b3e220ffbdd463ccae4b976d86d">rewrote
the code</a> again to use LibTomCrypt and it worked a treat.<br>
</p>
<p>I have finished the proof of concept by <a
moz-do-not-send="true"
href="https://github.com/TheDcoder/torhash/commit/39f24db29a46105eb022cfe626680c803069b223">implementing</a>
a reasonably secure random salt with the help of LibTomCrypt's
secure prng interface which uses platform-native methods (and an
ANSI C method as a fallback) to generate random bytes.</p>
<p>I assume the code is production ready at the moment. Though I
would be happy to hear any input that you guys might have to offer
:)<br>
</p>
<p>Regards,<br>
Damon H. (TheDcoder)<br>
</p>
<div class="moz-cite-prefix">On 03/05/19 1:15 PM, Damon (TheDcoder)
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:349265e8-bf3b-1653-6869-a48b5a16e9e4@disroot.org">
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<p> Hello everyone!</p>
<p>I have written a very simple tool called <a
moz-do-not-send="true"
href="https://github.com/TheDcoder/torhash">torhash</a> to
generate hashed passwords/strings according to the instructions
in control spec to authenticate with the controller interface
(TC?). I did not actually study the S2K algorithm since I found
it hard to understand RFC 2440, I studied source code and bit by
bit I figured out what was happening behind the scenes!</p>
<p>The reason I did this is that I am working on another program
called <a moz-do-not-send="true"
href="https://proxallium.dtw.tools/">ProxAllium</a> which acts
as a graphical user interface for Tor, I am currently in the
process of <a moz-do-not-send="true"
href="https://github.com/DcodingTheWeb/ProxAllium/tree/next-gen">rewriting</a>
it in C to make it cross-platform (along with a few other
reasons...). I hit a roadblock while I was implementing support
for interacting with the controller interface, I had to make a
choice between calling Tor to generate the hashed password or to
hash the password in the program itself. I felt like hashing the
password in the program itself was the right choice, I had a few
other weak reasons to not call Tor for hashing the password but
my gut was the main motivator behind this choice.</p>
<p>I created torhash (apologies about the bad name choice) as a
proof-of-concept and to improve my general programming skills, I
had no prior experience working with cryptography or hash
functions on this level, so I went with the simplest library I
could find for hashing the data. I could have gone with OpenSSL,
as I believe that it is the de-facto cross-platform standard for
cryptography and cryptographic hashing, I am currently looking
into using it, but I am not yet sure if this is a good idea.</p>
<p>I would be grateful if some of you can take out some time to
have a look, I am very excited to hear your opinions and any
advice that you may have to help me improve, the code itself is
very simple and short (114 lines of code). Pardon any mistakes
or bad code that I may have written, I have only begun
programming relatively recently and my experience with low-level
development (with C) is very recent.</p>
<p>Thank you for reading and for the input in advance!</p>
<p><br>
</p>
<p>Best Regards,</p>
<p>Damon H. (TheDcoder)<br>
</p>
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