350 строки
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350 строки
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<a href="nss-module.html">Package nss</a> ::
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<a href="nss.error-module.html">Module error</a> ::
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Class CertVerifyError
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<!-- ==================== TYPE DESCRIPTION ==================== -->
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<h1 class="epydoc">type CertVerifyError</h1><p class="nomargin-top"></p>
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<pre class="base-tree">
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object --+
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exceptions.BaseException --+
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exceptions.Exception --+
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<a href="nss.error.NSPRError-class.html">NSPRError</a> --+
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<strong class="uidshort">CertVerifyError</strong>
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</pre>
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<hr />
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<p>CertVerifyError(error_message=None, error_code=None, usages=None, log=None)</p>
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<p>Exception object (derived from NSPRError), raised when an
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error occurs during certificate verification.</p>
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<p>Raised internally, there should be no need to raise this exception
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from with a Python program using python-nss.</p>
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<p>Certificate verification presents a problem for the normal error
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handling model whereby any error returned from an underlying C
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function causes a <a href="nss.error.NSPRError-class.html" class="link">NSPRError</a> exception to be raised. When an
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exception is raised the return values are lost. It is unusual for a
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function to have useful return values when the function also returns
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an error.</p>
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<p>The certificate verification functions are one such example. If
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verification fails useful information concerning validated usages and
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the verification log need to be available. But to be consistent with
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model of always raising an exception on an error return some other
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mechanism is needed to return the extra information. The solution is
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to embed the information which normally would have been in the return
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values in the exception object where it can be queried. The
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CertVerifyError contails the returned usages bitmask and optionally
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the <a href="nss.nss.CertVerifyLog-class.html" class="link">CertVerifyLog</a> verification log object if requested.</p>
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<p>In addtion to the attributes in a <a href="nss.error.NSPRError-class.html" class="link">NSPRError</a> a CertVerifyError contains
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the following attributes:</p>
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<blockquote>
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<dl class="rst-docutils">
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<dt>usages</dt>
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<dd>The retured usages bitmask (unsigned int) from the Certificate
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verification function.</dd>
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<dt>log</dt>
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<dd>The (optional) <a href="nss.nss.CertVerifyLog-class.html" class="link">CertVerifyLog</a> object which contains the
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diagnostic information for why a certificate failed to validate.</dd>
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</dl>
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</blockquote>
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<!-- ==================== INSTANCE METHODS ==================== -->
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<span class="summary-type"> </span>
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<td><span class="summary-sig"><a href="nss.error.CertVerifyError-class.html#__init__" class="summary-sig-name">__init__</a>(<span class="summary-sig-arg">error_message</span>=<span class="summary-sig-default">None</span>,
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<span class="summary-sig-arg">error_code</span>=<span class="summary-sig-default">None</span>,
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<span class="summary-sig-arg">usages</span>=<span class="summary-sig-default">None</span>,
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<span class="summary-sig-arg">log</span>=<span class="summary-sig-default">None</span>)</span><br />
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x.__init__(...) initializes x; see help(type(x)) for signature</td>
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<span class="summary-type"> </span>
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</td><td class="summary">
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<td><span class="summary-sig"><a href="nss.error.CertVerifyError-class.html#__str__" class="summary-sig-name">__str__</a>(<span class="summary-sig-arg">x</span>)</span><br />
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<p class="indent-wrapped-lines"><b>Inherited from <code>exceptions.Exception</code></b>:
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<code>__new__</code>
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<p class="indent-wrapped-lines"><b>Inherited from <code>exceptions.BaseException</code></b>:
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<code>__delattr__</code>,
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<code>__getattribute__</code>,
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<code>__getitem__</code>,
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<code>__getslice__</code>,
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<code>__reduce__</code>,
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<code>__repr__</code>,
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<code>__setattr__</code>,
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<code>__setstate__</code>,
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<code>__unicode__</code>
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<span class="summary-type"> </span>
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</td><td class="summary">
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<a name="log"></a><span class="summary-name">log</span><br />
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verifcation log, see <a href="nss.nss.CertVerifyLog-class.html" class="link">CertVerifyLog</a>
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<td width="15%" align="right" valign="top" class="summary">
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<span class="summary-type"> </span>
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</td><td class="summary">
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<a name="usages"></a><span class="summary-name">usages</span><br />
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usages returned by NSS
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</td>
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<tr>
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<td colspan="2" class="summary">
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<p class="indent-wrapped-lines"><b>Inherited from <code><a href="nss.error.NSPRError-class.html">NSPRError</a></code></b>:
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<code><a href="nss.error.NSPRError-class.html#errno">errno</a></code>,
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<code><a href="nss.error.NSPRError-class.html#error_message">error_message</a></code>,
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<code><a href="nss.error.NSPRError-class.html#strerror">strerror</a></code>
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</p>
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<p class="indent-wrapped-lines"><b>Inherited from <code>exceptions.BaseException</code></b>:
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<code>args</code>,
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<code>message</code>
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</p>
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<!-- ==================== METHOD DETAILS ==================== -->
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><span class="options">[<a href="#section-MethodDetails"
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<a name="__init__"></a>
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<h3 class="epydoc"><span class="sig"><span class="sig-name">__init__</span>(<span class="sig-arg">error_message</span>=<span class="sig-default">None</span>,
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<span class="sig-arg">error_code</span>=<span class="sig-default">None</span>,
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<span class="sig-arg">usages</span>=<span class="sig-default">None</span>,
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<span class="sig-arg">log</span>=<span class="sig-default">None</span>)</span>
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<br /><em class="fname">(Constructor)</em>
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>
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x.__init__(...) initializes x; see help(type(x)) for signature
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<dl class="fields">
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<dt>Parameters:</dt>
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<dd><ul class="nomargin-top">
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<li><strong class="pname"><code>error_message</code></strong> (string) - Detail message specific to this error.</li>
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<li><strong class="pname"><code>error_code</code></strong> (int) - NSS or NSPR error value, if None get current error</li>
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<li><strong class="pname"><code>usages</code></strong> (int) - The returned usages bitmaks from the verify function.</li>
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<li><strong class="pname"><code>log</code></strong> (<a href="nss.nss.CertVerifyLog-class.html" class="link">CertVerifyLog</a> object) - The verification log generated during the verification
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operation.</li>
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</ul></dd>
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<dt>Overrides:
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exceptions.BaseException.__init__
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</dt>
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<a name="__str__"></a>
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<h3 class="epydoc"><span class="sig"><span class="sig-name">__str__</span>(<span class="sig-arg">x</span>)</span>
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<br /><em class="fname">(Informal representation operator)</em>
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</h3>
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</td><td align="right" valign="top"
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>
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str(x)
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<dl class="fields">
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<dt>Overrides:
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exceptions.BaseException.__str__
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