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<div class="section" id="exceptions">
<h1>Exceptions<a class="headerlink" href="#exceptions" title="Permalink to this headline">¶</a></h1>
<p>All of the exceptions raised from PyNaCl-exposed methods/functions
are subclasses of <code class="xref py py-exc docutils literal"><span class="pre">nacl.exceptions.CryptoError</span></code>. This means
downstream users can just wrap cryptographic operations inside a</p>
<div class="highlight-python"><div class="highlight"><pre><span></span><span class="k">try</span><span class="p">:</span>
<span class="c1"># cryptographic operations</span>
<span class="k">except</span> <span class="n">nacl</span><span class="o">.</span><span class="n">exceptions</span><span class="o">.</span><span class="n">CryptoError</span><span class="p">:</span>
<span class="c1"># cleanup after any kind of exception</span>
<span class="c1"># raised from cryptographic-related operations</span>
</pre></div>
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<p>These are the exceptions implemented in <code class="xref py py-mod docutils literal"><span class="pre">nacl.exceptions</span></code>:</p>
<div class="section" id="pynacl-specific-exceptions">
<h2>PyNaCl specific exceptions<a class="headerlink" href="#pynacl-specific-exceptions" title="Permalink to this headline">¶</a></h2>
<dl class="class">
<dt id="CryptoError">
<em class="property">class </em><code class="descname">CryptoError</code><a class="headerlink" href="#CryptoError" title="Permalink to this definition">¶</a></dt>
<dd><p>Base exception for all nacl related errors</p>
</dd></dl>
<dl class="class">
<dt id="BadSignatureError">
<em class="property">class </em><code class="descname">BadSignatureError</code><a class="headerlink" href="#BadSignatureError" title="Permalink to this definition">¶</a></dt>
<dd><p>Raised when the signature was forged or otherwise corrupt.</p>
</dd></dl>
<dl class="class">
<dt id="InvalidkeyError">
<em class="property">class </em><code class="descname">InvalidkeyError</code><a class="headerlink" href="#InvalidkeyError" title="Permalink to this definition">¶</a></dt>
<dd><p>Raised on password/key verification mismatch</p>
</dd></dl>
</div>
<div class="section" id="pynacl-exceptions-mixing-in-standard-library-ones">
<h2>PyNaCl exceptions mixing-in standard library ones<a class="headerlink" href="#pynacl-exceptions-mixing-in-standard-library-ones" title="Permalink to this headline">¶</a></h2>
<p>Both for clarity and for compatibility with previous releases
of the PyNaCl, the following exceptions mix-in the same-named
standard library exception to <code class="xref py py-class docutils literal"><span class="pre">CryptoError</span></code>.</p>
<dl class="class">
<dt id="RuntimeError">
<em class="property">class </em><code class="descname">RuntimeError</code><a class="headerlink" href="#RuntimeError" title="Permalink to this definition">¶</a></dt>
<dd><p>is a subclass of both CryptoError and standard library’s
RuntimeError, raised for internal library errors</p>
</dd></dl>
<dl class="class">
<dt id="AssertionError">
<em class="property">class </em><code class="descname">AssertionError</code><a class="headerlink" href="#AssertionError" title="Permalink to this definition">¶</a></dt>
<dd><p>is a subclass of both CryptoError and standard library’s
AssertionError, raised by default from
<a class="reference internal" href="utils.html#nacl.utils.ensure" title="nacl.utils.ensure"><code class="xref py py-func docutils literal"><span class="pre">ensure()</span></code></a> when the checked condition is <cite>False</cite></p>
</dd></dl>
<dl class="class">
<dt id="TypeError">
<em class="property">class </em><code class="descname">TypeError</code><a class="headerlink" href="#TypeError" title="Permalink to this definition">¶</a></dt>
<dd><p>is a subclass of both CryptoError and standard library’s
TypeError</p>
</dd></dl>
<dl class="class">
<dt id="ValueError">
<em class="property">class </em><code class="descname">ValueError</code><a class="headerlink" href="#ValueError" title="Permalink to this definition">¶</a></dt>
<dd><p>is a subclass of both CryptoError and standard library’s
ValueError</p>
</dd></dl>
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<ul>
<li><a class="reference internal" href="#">Exceptions</a><ul>
<li><a class="reference internal" href="#pynacl-specific-exceptions">PyNaCl specific exceptions</a></li>
<li><a class="reference internal" href="#pynacl-exceptions-mixing-in-standard-library-ones">PyNaCl exceptions mixing-in standard library ones</a></li>
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