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<a href="Crypto-module.html">Package Crypto</a> ::
<a href="Crypto.Protocol-module.html">Package Protocol</a> ::
<a href="Crypto.Protocol.AllOrNothing-module.html">Module AllOrNothing</a> ::
Class AllOrNothing
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<!-- ==================== CLASS DESCRIPTION ==================== -->
<h1 class="epydoc">Class AllOrNothing</h1><p class="nomargin-top"></p>
<p>Class implementing the All-or-Nothing package transform.</p>
<p>Methods for subclassing:</p>
<blockquote>
<dl class="rst-docutils">
<dt>_inventkey(key_size):</dt>
<dd>Returns a randomly generated key. Subclasses can use this to
implement better random key generating algorithms. The default
algorithm is probably not very cryptographically secure.</dd>
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<td><span class="summary-sig"><a href="Crypto.Protocol.AllOrNothing.AllOrNothing-class.html#__init__" class="summary-sig-name">__init__</a>(<span class="summary-sig-arg">ciphermodule</span>,
<span class="summary-sig-arg">mode</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">IV</span>=<span class="summary-sig-default">None</span>)</span><br />
ciphermodule is a module implementing the cipher algorithm to
use. It must provide the PEP272 interface.</td>
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<td><span class="summary-sig"><a href="Crypto.Protocol.AllOrNothing.AllOrNothing-class.html#digest" class="summary-sig-name">digest</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">text</span>)</span><br />
digest(text:string) : [string]</td>
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<td><span class="summary-sig"><a href="Crypto.Protocol.AllOrNothing.AllOrNothing-class.html#undigest" class="summary-sig-name">undigest</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">blocks</span>)</span><br />
undigest(blocks : [string]) : string</td>
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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">ciphermodule</span>,
<span class="sig-arg">mode</span>=<span class="sig-default">None</span>,
<span class="sig-arg">IV</span>=<span class="sig-default">None</span>)</span>
<br /><em class="fname">(Constructor)</em>
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<p>ciphermodule is a module implementing the cipher algorithm to
use. It must provide the PEP272 interface.</p>
<p>Note that the encryption key is randomly generated
automatically when needed. Optional arguments mode and IV are
passed directly through to the ciphermodule.new() method; they
are the feedback mode and initialization vector to use. All
three arguments must be the same for the object used to create
the digest, and to undigest'ify the message blocks.</p>
<dl class="fields">
</dl>
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<a name="digest"></a>
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<h3 class="epydoc"><span class="sig"><span class="sig-name">digest</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">text</span>)</span>
</h3>
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>
</td>
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<p>digest(text:string) : [string]</p>
<p>Perform the All-or-Nothing package transform on the given
string. Output is a list of message blocks describing the
transformed text, where each block is a string of bit length equal
to the ciphermodule's block_size.</p>
<dl class="fields">
</dl>
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<h3 class="epydoc"><span class="sig"><span class="sig-name">undigest</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">blocks</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
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<p>undigest(blocks : [string]) : string</p>
<p>Perform the reverse package transformation on a list of message
blocks. Note that the ciphermodule used for both transformations
must be the same. blocks is a list of strings of bit length
equal to the ciphermodule's block_size.</p>
<dl class="fields">
</dl>
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