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<div id="projectname">Crypto++
 <span id="projectnumber">7.0</span>
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<div id="projectbrief">Free C++ class library of cryptographic schemes</div>
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<a href="#pub-methods">Public Member Functions</a> |
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<div class="title">RandomizedTrapdoorFunctionInverse Class Reference<span class="mlabels"><span class="mlabel">abstract</span></span></div> </div>
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<p>Applies the inverse of the trapdoor function, using random data if required.
<a href="class_randomized_trapdoor_function_inverse.html#details">More...</a></p>
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<img id="dynsection-0-trigger" src="closed.png" alt="+"/> Inheritance diagram for RandomizedTrapdoorFunctionInverse:</div>
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<img src="class_randomized_trapdoor_function_inverse.png" usemap="#RandomizedTrapdoorFunctionInverse_map" alt=""/>
<map id="RandomizedTrapdoorFunctionInverse_map" name="RandomizedTrapdoorFunctionInverse_map">
<area href="class_invertible_e_s_i_g_n_function.html" title="ESIGN trapdoor function using the private key. " alt="InvertibleESIGNFunction" shape="rect" coords="0,56,223,80"/>
<area href="class_trapdoor_function_inverse.html" title="Applies the inverse of the trapdoor function. " alt="TrapdoorFunctionInverse" shape="rect" coords="349,56,572,80"/>
<area href="class_invertible_l_u_c_function.html" title="The LUC inverse function. " alt="InvertibleLUCFunction" shape="rect" coords="0,112,223,136"/>
<area href="class_invertible_rabin_function.html" title="Rabin trapdoor function using the private key. " alt="InvertibleRabinFunction" shape="rect" coords="233,112,456,136"/>
<area href="class_invertible_r_s_a_function.html" title="RSA trapdoor function using the private key. " alt="InvertibleRSAFunction" shape="rect" coords="466,112,689,136"/>
<area href="class_invertible_r_w_function.html" title="Rabin-Williams trapdoor function using the private key. " alt="InvertibleRWFunction" shape="rect" coords="699,112,922,136"/>
<area href="class_invertible_r_s_a_function___i_s_o.html" title="RSA trapdoor function using the private key. " alt="InvertibleRSAFunction_ISO" shape="rect" coords="466,168,689,192"/>
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<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:a2c01608b61496578c5fe2967e69b923a"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="class_integer.html">Integer</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_randomized_trapdoor_function_inverse.html#a2c01608b61496578c5fe2967e69b923a">CalculateRandomizedInverse</a> (<a class="el" href="class_random_number_generator.html">RandomNumberGenerator</a> &rng, const <a class="el" href="class_integer.html">Integer</a> &x) const =0</td></tr>
<tr class="memdesc:a2c01608b61496578c5fe2967e69b923a"><td class="mdescLeft"> </td><td class="mdescRight">Applies the inverse of the trapdoor function, using random data if required. <a href="#a2c01608b61496578c5fe2967e69b923a">More...</a><br /></td></tr>
<tr class="separator:a2c01608b61496578c5fe2967e69b923a"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ac37368328021acf2d48d6aa9f6cb71c9"><td class="memItemLeft" align="right" valign="top">virtual bool </td><td class="memItemRight" valign="bottom"><a class="el" href="class_randomized_trapdoor_function_inverse.html#ac37368328021acf2d48d6aa9f6cb71c9">IsRandomized</a> () const</td></tr>
<tr class="memdesc:ac37368328021acf2d48d6aa9f6cb71c9"><td class="mdescLeft"> </td><td class="mdescRight">Determines if the decryption algorithm is randomized. <a href="#ac37368328021acf2d48d6aa9f6cb71c9">More...</a><br /></td></tr>
<tr class="separator:ac37368328021acf2d48d6aa9f6cb71c9"><td class="memSeparator" colspan="2"> </td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Applies the inverse of the trapdoor function, using random data if required. </p>
<p>CalculateInverse() is the foundation for decrypting a message under a private key in a public key cryptosystem. Derived classes will override it at some point. </p><dl class="section see"><dt>See also</dt><dd><a class="el" href="class_trapdoor_function_bounds.html" title="Provides range for plaintext and ciphertext lengths. ">TrapdoorFunctionBounds()</a>, <a class="el" href="class_randomized_trapdoor_function.html" title="Applies the trapdoor function, using random data if required. ">RandomizedTrapdoorFunction()</a>, <a class="el" href="class_trapdoor_function.html" title="Applies the trapdoor function. ">TrapdoorFunction()</a>, <a class="el" href="class_randomized_trapdoor_function_inverse.html" title="Applies the inverse of the trapdoor function, using random data if required. ">RandomizedTrapdoorFunctionInverse()</a> and <a class="el" href="class_trapdoor_function_inverse.html" title="Applies the inverse of the trapdoor function. ">TrapdoorFunctionInverse()</a> </dd></dl>
<p class="definition">Definition at line <a class="el" href="pubkey_8h_source.html#l00154">154</a> of file <a class="el" href="pubkey_8h_source.html">pubkey.h</a>.</p>
</div><h2 class="groupheader">Member Function Documentation</h2>
<a id="a2c01608b61496578c5fe2967e69b923a"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a2c01608b61496578c5fe2967e69b923a">◆ </a></span>CalculateRandomizedInverse()</h2>
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<td class="memname">virtual <a class="el" href="class_integer.html">Integer</a> RandomizedTrapdoorFunctionInverse::CalculateRandomizedInverse </td>
<td>(</td>
<td class="paramtype"><a class="el" href="class_random_number_generator.html">RandomNumberGenerator</a> & </td>
<td class="paramname"><em>rng</em>, </td>
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<td class="paramtype">const <a class="el" href="class_integer.html">Integer</a> & </td>
<td class="paramname"><em>x</em> </td>
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<td>)</td>
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<p>Applies the inverse of the trapdoor function, using random data if required. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">rng</td><td>a <a class="el" href="class_random_number_generator.html" title="Interface for random number generators. ">RandomNumberGenerator</a> derived class </td></tr>
<tr><td class="paramname">x</td><td>the message on which the decryption function is applied </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>the message x decrypted under the private key</dd></dl>
<p>CalculateRandomizedInverse is a generalization of decryption using the private key The <a class="el" href="class_random_number_generator.html" title="Interface for random number generators. ">RandomNumberGenerator</a> may (or may not) be required. Derived classes must implement it. </p>
<p>Implemented in <a class="el" href="class_trapdoor_function_inverse.html#a784e232bea0630093ea0124e2e23fcc3">TrapdoorFunctionInverse</a>, and <a class="el" href="class_invertible_e_s_i_g_n_function.html#a0eed8ac3efb7868aa7ae0a09ee785610">InvertibleESIGNFunction</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ac37368328021acf2d48d6aa9f6cb71c9">◆ </a></span>IsRandomized()</h2>
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<td class="memname">virtual bool RandomizedTrapdoorFunctionInverse::IsRandomized </td>
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<td class="paramname"></td><td>)</td>
<td> const</td>
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<p>Determines if the decryption algorithm is randomized. </p>
<dl class="section return"><dt>Returns</dt><dd>true if the decryption algorithm is randomized, false otherwise</dd></dl>
<p>If <a class="el" href="class_randomized_trapdoor_function_inverse.html#ac37368328021acf2d48d6aa9f6cb71c9" title="Determines if the decryption algorithm is randomized. ">IsRandomized()</a> returns false, then <a class="el" href="cryptlib_8h.html#a1e53479a6d427158247ac1ece3161a6d" title="Random Number Generator that does not produce random numbers. ">NullRNG()</a> can be used. </p>
<p>Reimplemented in <a class="el" href="class_trapdoor_function_inverse.html#a9b2cad45cb51609e3caedfa7bb44594e">TrapdoorFunctionInverse</a>.</p>
<p class="definition">Definition at line <a class="el" href="pubkey_8h_source.html#l00170">170</a> of file <a class="el" href="pubkey_8h_source.html">pubkey.h</a>.</p>
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<hr/>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="pubkey_8h_source.html">pubkey.h</a></li>
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