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22<h1>Heimdal crypto library</h1>
23<p>
24<h3 align="center">1.5.2 </h3><h2><a class="anchor" name="intro">
25Introduction</a></h2>
26Heimdal libhcrypto library is a implementation many crypto algorithms, among others: AES, SHA, DES, RSA, Camellia and many help function.<p>
27hcrypto provies a OpenSSL compatible interface libcrypto interface and is licensed under a 3 clause BSD license (GPL compatible).<p>
28The project web page: <a href="http://www.h5l.org/">http://www.h5l.org/</a><p>
29Sections of this manual:<p>
30<ul>
31<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><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><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><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><li><a class="el" href="group__hcrypto__misc.html">hcrypto miscellaneous functions</a></li></ul>
32<p>
33Older interfaces that you should not use:<p>
34<ul>
35<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></ul>
36<h3><a class="anchor" name="control_functions">
37Control functions</a></h3>
38Functions controlling general behavior, like adding algorithms, are documented in this module: <a class="el" href="group__hcrypto__core.html">hcrypto function controlling behavior</a> .<h3><a class="anchor" name="return_values">
39Return values</a></h3>
40Return 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.<h3><a class="anchor" name="History">
41History</a></h3>
42Eric 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>
43libhcrypto is an independent implementation with no code decended from ssleay/openssl. Both includes some common imported code, for example the AES implementation. </div>
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