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<a href="Crypto-module.html">Package Crypto</a> ::
<a href="Crypto.PublicKey-module.html">Package PublicKey</a> ::
<a href="Crypto.PublicKey.RSA-module.html">Module RSA</a> ::
Class _RSAobj
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<!-- ==================== CLASS DESCRIPTION ==================== -->
<h1 class="epydoc">Class _RSAobj</h1><p class="nomargin-top"></p>
<pre class="base-tree">
pubkey.pubkey --+
|
<strong class="uidshort">_RSAobj</strong>
</pre>
<hr />
Class defining an actual RSA key.
<!-- ==================== INSTANCE METHODS ==================== -->
<a name="section-InstanceMethods"></a>
<table class="summary" border="1" cellpadding="3"
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<span class="table-header">Instance Methods</span></td>
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<span class="summary-type"> </span>
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<td><span class="summary-sig"><a href="Crypto.PublicKey.RSA._RSAobj-class.html#__init__" class="summary-sig-name">__init__</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">implementation</span>,
<span class="summary-sig-arg">key</span>,
<span class="summary-sig-arg">randfunc</span>=<span class="summary-sig-default">None</span>)</span></td>
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<span class="summary-type"> </span>
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<td><span class="summary-sig"><a href="Crypto.PublicKey.RSA._RSAobj-class.html#encrypt" class="summary-sig-name">encrypt</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">plaintext</span>,
<span class="summary-sig-arg">K</span>)</span><br />
Encrypt a piece of data with RSA.</td>
<td align="right" valign="top">
</td>
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</table>
</td>
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<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
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<td><span class="summary-sig"><a href="Crypto.PublicKey.RSA._RSAobj-class.html#decrypt" class="summary-sig-name">decrypt</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">ciphertext</span>)</span><br />
Decrypt a piece of data with RSA.</td>
<td align="right" valign="top">
</td>
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</table>
</td>
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<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
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<tr>
<td><span class="summary-sig"><a href="Crypto.PublicKey.RSA._RSAobj-class.html#sign" class="summary-sig-name">sign</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">M</span>,
<span class="summary-sig-arg">K</span>)</span><br />
Sign a piece of data with RSA.</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="Crypto.PublicKey.RSA._RSAobj-class.html#verify" class="summary-sig-name">verify</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">M</span>,
<span class="summary-sig-arg">signature</span>)</span><br />
Verify the validity of an RSA signature.</td>
<td align="right" valign="top">
</td>
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</table>
</td>
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<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
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<td><span class="summary-sig"><a href="Crypto.PublicKey.RSA._RSAobj-class.html#has_private" class="summary-sig-name">has_private</a>(<span class="summary-sig-arg">self</span>)</span><br />
Tell if the key object contains private components.</td>
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</td>
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</table>
</td>
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<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
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<tr>
<td><span class="summary-sig"><a href="Crypto.PublicKey.RSA._RSAobj-class.html#size" class="summary-sig-name">size</a>(<span class="summary-sig-arg">self</span>)</span><br />
Tell the maximum number of bits that can be handled by this key.</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="Crypto.PublicKey.RSA._RSAobj-class.html#can_blind" class="summary-sig-name">can_blind</a>(<span class="summary-sig-arg">self</span>)</span><br />
Tell if the algorithm can deal with data blinding.</td>
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</td>
</tr>
</table>
</td>
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<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
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<tr>
<td><span class="summary-sig"><a href="Crypto.PublicKey.RSA._RSAobj-class.html#can_encrypt" class="summary-sig-name">can_encrypt</a>(<span class="summary-sig-arg">self</span>)</span><br />
Tell if the algorithm can deal with data encryption.</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="Crypto.PublicKey.RSA._RSAobj-class.html#can_sign" class="summary-sig-name">can_sign</a>(<span class="summary-sig-arg">self</span>)</span><br />
Tell if the algorithm can deal with cryptographic signatures.</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
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<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
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<td><span class="summary-sig"><a href="Crypto.PublicKey.RSA._RSAobj-class.html#publickey" class="summary-sig-name">publickey</a>(<span class="summary-sig-arg">self</span>)</span><br />
Construct a new key carrying only the public information.</td>
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<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
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<tr>
<td><span class="summary-sig"><a href="Crypto.PublicKey.RSA._RSAobj-class.html#exportKey" class="summary-sig-name">exportKey</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">format</span>=<span class="summary-sig-default"><code class="variable-quote">'</code><code class="variable-string">PEM</code><code class="variable-quote">'</code></span>,
<span class="summary-sig-arg">passphrase</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">pkcs</span>=<span class="summary-sig-default">1</span>)</span><br />
Export this RSA key.</td>
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</td>
</tr>
</table>
</td>
</tr>
<tr>
<td colspan="2" class="summary">
<p class="indent-wrapped-lines"><b>Inherited from <code>pubkey.pubkey</code></b>:
<code>blind</code>,
<code>unblind</code>
</p>
</td>
</tr>
</table>
<!-- ==================== CLASS VARIABLES ==================== -->
<a name="section-ClassVariables"></a>
<table class="summary" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr bgcolor="#70b0f0" class="table-header">
<td align="left" colspan="2" class="table-header">
<span class="table-header">Class Variables</span></td>
</tr>
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<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a href="Crypto.PublicKey.RSA._RSAobj-class.html#keydata" class="summary-name">keydata</a> = <code title="['n', 'e', 'd', 'p', 'q', 'u']"><code class="variable-group">[</code><code class="variable-quote">'</code><code class="variable-string">n</code><code class="variable-quote">'</code><code class="variable-op">, </code><code class="variable-quote">'</code><code class="variable-string">e</code><code class="variable-quote">'</code><code class="variable-op">, </code><code class="variable-quote">'</code><code class="variable-string">d</code><code class="variable-quote">'</code><code class="variable-op">, </code><code class="variable-quote">'</code><code class="variable-string">p</code><code class="variable-quote">'</code><code class="variable-op">, </code><code class="variable-quote">'</code><code class="variable-string">q</code><code class="variable-quote">'</code><code class="variable-op">, </code><code class="variable-quote">'</code><code class="variable-string">u</code><code class="variable-quote">'</code><code class="variable-group">]</code></code><br />
Dictionary of RSA parameters.
</td>
</tr>
</table>
<!-- ==================== METHOD DETAILS ==================== -->
<a name="section-MethodDetails"></a>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr bgcolor="#70b0f0" class="table-header">
<td align="left" colspan="2" class="table-header">
<span class="table-header">Method Details</span></td>
</tr>
</table>
<a name="__init__"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
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<h3 class="epydoc"><span class="sig"><span class="sig-name">__init__</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">implementation</span>,
<span class="sig-arg">key</span>,
<span class="sig-arg">randfunc</span>=<span class="sig-default">None</span>)</span>
<br /><em class="fname">(Constructor)</em>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<dl class="fields">
<dt>Overrides:
pubkey.pubkey.__init__
</dt>
</dl>
</td></tr></table>
</div>
<a name="encrypt"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">encrypt</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">plaintext</span>,
<span class="sig-arg">K</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
Encrypt a piece of data with RSA.
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>plaintext</code></strong> (byte string or long) - The piece of data to encrypt with RSA. It may not
be numerically larger than the RSA module (<strong>n</strong>).</li>
<li><strong class="pname"><code>K</code></strong> (byte string or long) - A random parameter (<em>for compatibility only. This
value will be ignored</em>)</li>
</ul></dd>
<dt>Returns:</dt>
<dd>A tuple with two items. The first item is the ciphertext
of the same type as the plaintext (string or long). The second item
is always None.</dd>
<dt>Overrides:
pubkey.pubkey.encrypt
</dt>
</dl>
<div class="fields"> <p><strong>Attention:</strong>
this function performs the plain, primitive RSA encryption
(<em>textbook</em>). In real applications, you always need to use proper
cryptographic padding, and you should not directly encrypt data with
this method. Failure to do so may lead to security vulnerabilities.
It is recommended to use modules
<a href="Crypto.Cipher.PKCS1_OAEP-module.html" class="link">Crypto.Cipher.PKCS1_OAEP</a> or <a href="Crypto.Cipher.PKCS1_v1_5-module.html" class="link">Crypto.Cipher.PKCS1_v1_5</a> instead.
</p>
</div></td></tr></table>
</div>
<a name="decrypt"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">decrypt</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">ciphertext</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Decrypt a piece of data with RSA.</p>
<p>Decryption always takes place with blinding.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>ciphertext</code></strong> (byte string, long or a 2-item tuple as returned by
<a href="Crypto.PublicKey.RSA._RSAobj-class.html#encrypt" class="link">encrypt</a>) - The piece of data to decrypt with RSA. It may
not be numerically larger than the RSA module (<strong>n</strong>). If a tuple,
the first item is the actual ciphertext; the second item is ignored.</li>
</ul></dd>
<dt>Returns:</dt>
<dd>A byte string if ciphertext was a byte string or a tuple
of byte strings. A long otherwise.</dd>
<dt>Overrides:
pubkey.pubkey.decrypt
</dt>
</dl>
<div class="fields"> <p><strong>Attention:</strong>
this function performs the plain, primitive RSA decryption
(<em>textbook</em>). In real applications, you always need to use proper
cryptographic padding, and you should not directly decrypt data with
this method. Failure to do so may lead to security vulnerabilities.
It is recommended to use modules
<a href="Crypto.Cipher.PKCS1_OAEP-module.html" class="link">Crypto.Cipher.PKCS1_OAEP</a> or <a href="Crypto.Cipher.PKCS1_v1_5-module.html" class="link">Crypto.Cipher.PKCS1_v1_5</a> instead.
</p>
</div></td></tr></table>
</div>
<a name="sign"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">sign</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">M</span>,
<span class="sig-arg">K</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Sign a piece of data with RSA.</p>
<p>Signing always takes place with blinding.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>M</code></strong> (byte string or long) - The piece of data to sign with RSA. It may
not be numerically larger than the RSA module (<strong>n</strong>).</li>
<li><strong class="pname"><code>K</code></strong> (byte string or long) - A random parameter (<em>for compatibility only. This
value will be ignored</em>)</li>
</ul></dd>
<dt>Returns:</dt>
<dd>A 2-item tuple. The first item is the actual signature (a
long). The second item is always None.</dd>
<dt>Overrides:
pubkey.pubkey.sign
</dt>
</dl>
<div class="fields"> <p><strong>Attention:</strong>
this function performs the plain, primitive RSA decryption
(<em>textbook</em>). In real applications, you always need to use proper
cryptographic padding, and you should not directly sign data with
this method. Failure to do so may lead to security vulnerabilities.
It is recommended to use modules
<a href="Crypto.Signature.PKCS1_PSS-module.html" class="link">Crypto.Signature.PKCS1_PSS</a> or <a href="Crypto.Signature.PKCS1_v1_5-module.html" class="link">Crypto.Signature.PKCS1_v1_5</a> instead.
</p>
</div></td></tr></table>
</div>
<a name="verify"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">verify</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">M</span>,
<span class="sig-arg">signature</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
Verify the validity of an RSA signature.
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>M</code></strong> (byte string or long) - The expected message.</li>
<li><strong class="pname"><code>signature</code></strong> (A 2-item tuple as return by <a href="Crypto.PublicKey.RSA._RSAobj-class.html#sign" class="link">sign</a>) - The RSA signature to verify. The first item of
the tuple is the actual signature (a long not larger than the modulus
<strong>n</strong>), whereas the second item is always ignored.</li>
</ul></dd>
<dt>Returns:</dt>
<dd>True if the signature is correct, False otherwise.</dd>
<dt>Overrides:
pubkey.pubkey.verify
</dt>
</dl>
<div class="fields"> <p><strong>Attention:</strong>
this function performs the plain, primitive RSA encryption
(<em>textbook</em>). In real applications, you always need to use proper
cryptographic padding, and you should not directly verify data with
this method. Failure to do so may lead to security vulnerabilities.
It is recommended to use modules
<a href="Crypto.Signature.PKCS1_PSS-module.html" class="link">Crypto.Signature.PKCS1_PSS</a> or <a href="Crypto.Signature.PKCS1_v1_5-module.html" class="link">Crypto.Signature.PKCS1_v1_5</a> instead.
</p>
</div></td></tr></table>
</div>
<a name="has_private"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">has_private</span>(<span class="sig-arg">self</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
Tell if the key object contains private components.
<dl class="fields">
<dt>Returns:</dt>
<dd>bool</dd>
<dt>Overrides:
pubkey.pubkey.has_private
<dd><em class="note">(inherited documentation)</em></dd>
</dt>
</dl>
</td></tr></table>
</div>
<a name="size"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">size</span>(<span class="sig-arg">self</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
Tell the maximum number of bits that can be handled by this key.
<dl class="fields">
<dt>Returns:</dt>
<dd>int</dd>
<dt>Overrides:
pubkey.pubkey.size
<dd><em class="note">(inherited documentation)</em></dd>
</dt>
</dl>
</td></tr></table>
</div>
<a name="can_blind"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">can_blind</span>(<span class="sig-arg">self</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Tell if the algorithm can deal with data blinding.</p>
<p>This property concerns the <em>algorithm</em>, not the key itself.
It may happen that this particular key object hasn't got
the private information required carry out blinding.</p>
<dl class="fields">
<dt>Returns:</dt>
<dd>boolean</dd>
<dt>Overrides:
pubkey.pubkey.can_blind
<dd><em class="note">(inherited documentation)</em></dd>
</dt>
</dl>
</td></tr></table>
</div>
<a name="can_encrypt"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">can_encrypt</span>(<span class="sig-arg">self</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Tell if the algorithm can deal with data encryption.</p>
<p>This property concerns the <em>algorithm</em>, not the key itself.
It may happen that this particular key object hasn't got
the private information required to decrypt data.</p>
<dl class="fields">
<dt>Returns:</dt>
<dd>boolean</dd>
<dt>Overrides:
pubkey.pubkey.can_encrypt
<dd><em class="note">(inherited documentation)</em></dd>
</dt>
</dl>
</td></tr></table>
</div>
<a name="can_sign"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">can_sign</span>(<span class="sig-arg">self</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Tell if the algorithm can deal with cryptographic signatures.</p>
<p>This property concerns the <em>algorithm</em>, not the key itself.
It may happen that this particular key object hasn't got
the private information required to generate a signature.</p>
<dl class="fields">
<dt>Returns:</dt>
<dd>boolean</dd>
<dt>Overrides:
pubkey.pubkey.can_sign
<dd><em class="note">(inherited documentation)</em></dd>
</dt>
</dl>
</td></tr></table>
</div>
<a name="publickey"></a>
<div>
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cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">publickey</span>(<span class="sig-arg">self</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
Construct a new key carrying only the public information.
<dl class="fields">
<dt>Returns:</dt>
<dd>A new pubkey object.</dd>
<dt>Overrides:
pubkey.pubkey.publickey
<dd><em class="note">(inherited documentation)</em></dd>
</dt>
</dl>
</td></tr></table>
</div>
<a name="exportKey"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">exportKey</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">format</span>=<span class="sig-default"><code class="variable-quote">'</code><code class="variable-string">PEM</code><code class="variable-quote">'</code></span>,
<span class="sig-arg">passphrase</span>=<span class="sig-default">None</span>,
<span class="sig-arg">pkcs</span>=<span class="sig-default">1</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Export this RSA key.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><p><strong class="pname"><code>format</code></strong> (string) - The format to use for wrapping the key.</p>
<ul class="rst-simple">
<li><em>'DER'</em>. Binary encoding, always unencrypted.</li>
<li><em>'PEM'</em>. Textual encoding, done according to <a class="rst-reference external" href="http://www.ietf.org/rfc/rfc1421.txt" target="_top">RFC1421</a>/<a class="rst-reference external" href="http://www.ietf.org/rfc/rfc1423.txt" target="_top">RFC1423</a>.
Unencrypted (default) or encrypted.</li>
<li><em>'OpenSSH'</em>. Textual encoding, done according to OpenSSH specification.
Only suitable for public keys (not private keys).</li>
</ul></li>
<li><strong class="pname"><code>passphrase</code></strong> (string) - In case of PEM, the pass phrase to derive the encryption key from.</li>
<li><p><strong class="pname"><code>pkcs</code></strong> (integer) - The PKCS standard to follow for assembling the key.
You have two choices:</p>
<blockquote>
<ul class="rst-simple">
<li>with <strong>1</strong>, the public key is embedded into an X.509 <code class="link">SubjectPublicKeyInfo</code> DER SEQUENCE.
The private key is embedded into a <a class="rst-reference external" href="http://www.ietf.org/rfc/rfc3447.txt" target="_top">PKCS#1</a> <code class="link">RSAPrivateKey</code> DER SEQUENCE.
This mode is the default.</li>
<li>with <strong>8</strong>, the private key is embedded into a <a class="rst-reference external" href="http://www.ietf.org/rfc/rfc5208.txt" target="_top">PKCS#8</a> <code class="link">PrivateKeyInfo</code> DER SEQUENCE.
This mode is not available for public keys.</li>
</ul>
</blockquote>
<p>PKCS standards are not relevant for the <em>OpenSSH</em> format.</p></li>
</ul></dd>
<dt>Returns:</dt>
<dd>A byte string with the encoded public or private half.</dd>
<dt>Raises:</dt>
<dd><ul class="nomargin-top">
<li><code><strong class='fraise'>ValueError</strong></code> - When the format is unknown.</li>
</ul></dd>
</dl>
</td></tr></table>
</div>
<br />
<!-- ==================== CLASS VARIABLE DETAILS ==================== -->
<a name="section-ClassVariableDetails"></a>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr bgcolor="#70b0f0" class="table-header">
<td align="left" colspan="2" class="table-header">
<span class="table-header">Class Variable Details</span></td>
</tr>
</table>
<a name="keydata"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<h3 class="epydoc">keydata</h3>
<p>Dictionary of RSA parameters.</p>
<p>A public key will only have the following entries:</p>
<blockquote>
<ul class="rst-simple">
<li><strong>n</strong>, the modulus.</li>
<li><strong>e</strong>, the public exponent.</li>
</ul>
</blockquote>
<p>A private key will also have:</p>
<blockquote>
<ul class="rst-simple">
<li><strong>d</strong>, the private exponent.</li>
<li><strong>p</strong>, the first factor of n.</li>
<li><strong>q</strong>, the second factor of n.</li>
<li><strong>u</strong>, the CRT coefficient (1/p) mod q.</li>
</ul>
</blockquote>
<dl class="fields">
</dl>
<dl class="fields">
<dt>Value:</dt>
<dd><table><tr><td><pre class="variable">
<code class="variable-group">[</code><code class="variable-quote">'</code><code class="variable-string">n</code><code class="variable-quote">'</code><code class="variable-op">, </code><code class="variable-quote">'</code><code class="variable-string">e</code><code class="variable-quote">'</code><code class="variable-op">, </code><code class="variable-quote">'</code><code class="variable-string">d</code><code class="variable-quote">'</code><code class="variable-op">, </code><code class="variable-quote">'</code><code class="variable-string">p</code><code class="variable-quote">'</code><code class="variable-op">, </code><code class="variable-quote">'</code><code class="variable-string">q</code><code class="variable-quote">'</code><code class="variable-op">, </code><code class="variable-quote">'</code><code class="variable-string">u</code><code class="variable-quote">'</code><code class="variable-group">]</code>
</pre></td></tr></table>
</dd>
</dl>
</td></tr></table>
</div>
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