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24<div class="title">Heimdal crypto library </div>  </div>
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27<div class="textblock"><h1><a class="anchor" id="intro"></a>
28Introduction</h1>
29<p>Heimdal libhcrypto library is a implementation many crypto algorithms, among others: AES, SHA, DES, RSA, Camellia and many help function.</p>
30<p>hcrypto provies a OpenSSL compatible interface libcrypto interface and is licensed under a 3 clause BSD license (GPL compatible).</p>
31<p>The project web page: <a href="http://www.h5l.org/">http://www.h5l.org/</a></p>
32<p>Sections of this manual:</p>
33<ul>
34<li><a class="el" href="page_evp.html">EVP - generic crypto interface</a>, <a class="el" href="group__hcrypto__evp.html">EVP generic crypto functions</a></li>
35<li><a class="el" href="page_rand.html">RAND - random number</a>, <a class="el" href="group__hcrypto__rand.html">RAND crypto functions</a></li>
36<li><a class="el" href="page_dh.html">DH - Diffie-Hellman key exchange</a>, <a class="el" href="group__hcrypto__dh.html">Diffie-Hellman functions</a></li>
37<li><a class="el" href="page_rsa.html">RSA - public-key cryptography</a>, <a class="el" href="group__hcrypto__rsa.html">RSA functions</a></li>
38<li><a class="el" href="group__hcrypto__misc.html">hcrypto miscellaneous functions</a></li>
39</ul>
40<p>Older interfaces that you should not use:</p>
41<ul>
42<li><a class="el" href="page_des.html">DES - Data Encryption Standard crypto interface</a>, <a class="el" href="group__hcrypto__des.html">DES crypto functions</a></li>
43</ul>
44<h2><a class="anchor" id="control_functions"></a>
45Control functions</h2>
46<p>Functions controlling general behavior, like adding algorithms, are documented in this module: <a class="el" href="group__hcrypto__core.html">hcrypto function controlling behavior</a> .</p>
47<h2><a class="anchor" id="return_values"></a>
48Return values</h2>
49<p>Return values are diffrent in this module to be compatible with OpenSSL interface. The diffrence is that on success 1 is returned instead of the customary 0.</p>
50<h2><a class="anchor" id="History"></a>
51History</h2>
52<p>Eric Young implemented DES in the library libdes, that grew into libcrypto in the ssleay package. ssleay went into recession and then got picked up by the OpenSSL (htp://www.openssl.org/) project.</p>
53<p>libhcrypto is an independent implementation with no code decended from ssleay/openssl. Both includes some common imported code, for example the AES implementation. </p>
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