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<div class="section" id="cryptographic-services">
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<span id="crypto"></span><h1>Cryptographic Services<a class="headerlink" href="#cryptographic-services" title="Permalink to this headline">¶</a></h1>
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<p id="index-0">The modules described in this chapter implement various algorithms of a
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cryptographic nature. They are available at the discretion of the installation.
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On Unix systems, the <a class="reference internal" href="crypt.html#module-crypt" title="crypt: The crypt() function used to check Unix passwords. (Unix)"><code class="xref py py-mod docutils literal notranslate"><span class="pre">crypt</span></code></a> module may also be available.
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Here’s an overview:</p>
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<div class="toctree-wrapper compound">
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<ul>
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<li class="toctree-l1"><a class="reference internal" href="hashlib.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">hashlib</span></code> — Secure hashes and message digests</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="hashlib.html#hash-algorithms">Hash algorithms</a></li>
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<li class="toctree-l2"><a class="reference internal" href="hashlib.html#shake-variable-length-digests">SHAKE variable length digests</a></li>
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<li class="toctree-l2"><a class="reference internal" href="hashlib.html#key-derivation">Key derivation</a></li>
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<li class="toctree-l2"><a class="reference internal" href="hashlib.html#blake2">BLAKE2</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="hashlib.html#creating-hash-objects">Creating hash objects</a></li>
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<li class="toctree-l3"><a class="reference internal" href="hashlib.html#constants">Constants</a></li>
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<li class="toctree-l3"><a class="reference internal" href="hashlib.html#examples">Examples</a><ul>
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<li class="toctree-l4"><a class="reference internal" href="hashlib.html#simple-hashing">Simple hashing</a></li>
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<li class="toctree-l4"><a class="reference internal" href="hashlib.html#using-different-digest-sizes">Using different digest sizes</a></li>
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<li class="toctree-l4"><a class="reference internal" href="hashlib.html#keyed-hashing">Keyed hashing</a></li>
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<li class="toctree-l4"><a class="reference internal" href="hashlib.html#randomized-hashing">Randomized hashing</a></li>
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<li class="toctree-l4"><a class="reference internal" href="hashlib.html#personalization">Personalization</a></li>
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<li class="toctree-l4"><a class="reference internal" href="hashlib.html#tree-mode">Tree mode</a></li>
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</ul>
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</li>
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<li class="toctree-l3"><a class="reference internal" href="hashlib.html#credits">Credits</a></li>
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</ul>
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</li>
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</ul>
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</li>
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<li class="toctree-l1"><a class="reference internal" href="hmac.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">hmac</span></code> — Keyed-Hashing for Message Authentication</a></li>
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<li class="toctree-l1"><a class="reference internal" href="secrets.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">secrets</span></code> — Generate secure random numbers for managing secrets</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="secrets.html#random-numbers">Random numbers</a></li>
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<li class="toctree-l2"><a class="reference internal" href="secrets.html#generating-tokens">Generating tokens</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="secrets.html#how-many-bytes-should-tokens-use">How many bytes should tokens use?</a></li>
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</ul>
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</li>
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<li class="toctree-l2"><a class="reference internal" href="secrets.html#other-functions">Other functions</a></li>
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<li class="toctree-l2"><a class="reference internal" href="secrets.html#recipes-and-best-practices">Recipes and best practices</a></li>
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</ul>
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</li>
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</ul>
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<p class="topless"><a href="plistlib.html"
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title="previous chapter"><code class="xref py py-mod docutils literal notranslate"><span class="pre">plistlib</span></code> — Generate and parse Mac OS X <code class="docutils literal notranslate"><span class="pre">.plist</span></code> files</a></p>
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<h4>Next topic</h4>
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<p class="topless"><a href="hashlib.html"
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title="next chapter"><code class="xref py py-mod docutils literal notranslate"><span class="pre">hashlib</span></code> — Secure hashes and message digests</a></p>
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<br />
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Last updated on Jul 13, 2019.
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