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<title>Crypto++: PK_Encryptor Class Reference</title>
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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="#nested-classes">Classes</a> |
<a href="#pub-methods">Public Member Functions</a> |
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<div class="title">PK_Encryptor Class Reference<span class="mlabels"><span class="mlabel">abstract</span></span></div> </div>
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<p>Interface for public-key encryptors.
<a href="class_p_k___encryptor.html#details">More...</a></p>
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<img id="dynsection-0-trigger" src="closed.png" alt="+"/> Inheritance diagram for PK_Encryptor:</div>
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<img src="class_p_k___encryptor.png" usemap="#PK_5FEncryptor_map" alt=""/>
<map id="PK_5FEncryptor_map" name="PK_5FEncryptor_map">
<area href="class_p_k___crypto_system.html" title="Interface for public-key encryptors and decryptors. " alt="PK_CryptoSystem" shape="rect" coords="381,168,1134,192"/>
<area href="class_public_key_algorithm.html" title="Interface for asymmetric algorithms using public keys. " alt="PublicKeyAlgorithm" shape="rect" coords="1144,168,1897,192"/>
<area href="class_asymmetric_algorithm.html" title="Interface for asymmetric algorithms. " alt="AsymmetricAlgorithm" shape="rect" coords="1144,112,1897,136"/>
<area href="class_algorithm.html" title="Interface for all crypto algorithms. " alt="Algorithm" shape="rect" coords="1144,56,1897,80"/>
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<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="nested-classes"></a>
Classes</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">class  </td><td class="memItemRight" valign="bottom"><a class="el" href="class_p_k___encryptor_1_1_invalid_plaintext_length.html">InvalidPlaintextLength</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight"><a class="el" href="class_exception.html" title="Base class for all exceptions thrown by the library. ">Exception</a> thrown when trying to encrypt plaintext of invalid length. <a href="class_p_k___encryptor_1_1_invalid_plaintext_length.html#details">More...</a><br /></td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:aecb519bc1cb0b261698be999bb5c8961"><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_p_k___encryptor.html#aecb519bc1cb0b261698be999bb5c8961">Encrypt</a> (<a class="el" href="class_random_number_generator.html">RandomNumberGenerator</a> &rng, const byte *plaintext, size_t plaintextLength, byte *ciphertext, const <a class="el" href="class_name_value_pairs.html">NameValuePairs</a> &parameters=<a class="el" href="cryptlib_8h.html#a04be65ada92ccb1e6aac0d94b4cc394b">g_nullNameValuePairs</a>) const =0</td></tr>
<tr class="memdesc:aecb519bc1cb0b261698be999bb5c8961"><td class="mdescLeft"> </td><td class="mdescRight">Encrypt a byte string. <a href="#aecb519bc1cb0b261698be999bb5c8961">More...</a><br /></td></tr>
<tr class="separator:aecb519bc1cb0b261698be999bb5c8961"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a558cc0f957c7e1e448a746033549964d"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="class_buffered_transformation.html">BufferedTransformation</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="class_p_k___encryptor.html#a558cc0f957c7e1e448a746033549964d">CreateEncryptionFilter</a> (<a class="el" href="class_random_number_generator.html">RandomNumberGenerator</a> &rng, <a class="el" href="class_buffered_transformation.html">BufferedTransformation</a> *attachment=NULL, const <a class="el" href="class_name_value_pairs.html">NameValuePairs</a> &parameters=<a class="el" href="cryptlib_8h.html#a04be65ada92ccb1e6aac0d94b4cc394b">g_nullNameValuePairs</a>) const</td></tr>
<tr class="memdesc:a558cc0f957c7e1e448a746033549964d"><td class="mdescLeft"> </td><td class="mdescRight">Create a new encryption filter. <a href="#a558cc0f957c7e1e448a746033549964d">More...</a><br /></td></tr>
<tr class="separator:a558cc0f957c7e1e448a746033549964d"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="inherit_header pub_methods_class_p_k___crypto_system"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_class_p_k___crypto_system')"><img src="closed.png" alt="-"/> Public Member Functions inherited from <a class="el" href="class_p_k___crypto_system.html">PK_CryptoSystem</a></td></tr>
<tr class="memitem:aa4a3552c933a36b3aea26f31d00bee9b inherit pub_methods_class_p_k___crypto_system"><td class="memItemLeft" align="right" valign="top">virtual size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="class_p_k___crypto_system.html#aa4a3552c933a36b3aea26f31d00bee9b">MaxPlaintextLength</a> (size_t ciphertextLength) const =0</td></tr>
<tr class="memdesc:aa4a3552c933a36b3aea26f31d00bee9b inherit pub_methods_class_p_k___crypto_system"><td class="mdescLeft"> </td><td class="mdescRight">Provides the maximum length of plaintext for a given ciphertext length. <a href="class_p_k___crypto_system.html#aa4a3552c933a36b3aea26f31d00bee9b">More...</a><br /></td></tr>
<tr class="separator:aa4a3552c933a36b3aea26f31d00bee9b inherit pub_methods_class_p_k___crypto_system"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:abf04a4e08fb69a1a118bad3e998ef6a6 inherit pub_methods_class_p_k___crypto_system"><td class="memItemLeft" align="right" valign="top">virtual size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="class_p_k___crypto_system.html#abf04a4e08fb69a1a118bad3e998ef6a6">CiphertextLength</a> (size_t plaintextLength) const =0</td></tr>
<tr class="memdesc:abf04a4e08fb69a1a118bad3e998ef6a6 inherit pub_methods_class_p_k___crypto_system"><td class="mdescLeft"> </td><td class="mdescRight">Calculate the length of ciphertext given length of plaintext. <a href="class_p_k___crypto_system.html#abf04a4e08fb69a1a118bad3e998ef6a6">More...</a><br /></td></tr>
<tr class="separator:abf04a4e08fb69a1a118bad3e998ef6a6 inherit pub_methods_class_p_k___crypto_system"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a294c4664af51a72112db1f04e6ef9049 inherit pub_methods_class_p_k___crypto_system"><td class="memItemLeft" align="right" valign="top">virtual bool </td><td class="memItemRight" valign="bottom"><a class="el" href="class_p_k___crypto_system.html#a294c4664af51a72112db1f04e6ef9049">ParameterSupported</a> (const char *name) const =0</td></tr>
<tr class="memdesc:a294c4664af51a72112db1f04e6ef9049 inherit pub_methods_class_p_k___crypto_system"><td class="mdescLeft"> </td><td class="mdescRight">Determines whether this object supports the use of a named parameter. <a href="class_p_k___crypto_system.html#a294c4664af51a72112db1f04e6ef9049">More...</a><br /></td></tr>
<tr class="separator:a294c4664af51a72112db1f04e6ef9049 inherit pub_methods_class_p_k___crypto_system"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:af415eacc974d297a03c4e7de710e5b4e inherit pub_methods_class_p_k___crypto_system"><td class="memItemLeft" align="right" valign="top">virtual size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="class_p_k___crypto_system.html#af415eacc974d297a03c4e7de710e5b4e">FixedCiphertextLength</a> () const</td></tr>
<tr class="memdesc:af415eacc974d297a03c4e7de710e5b4e inherit pub_methods_class_p_k___crypto_system"><td class="mdescLeft"> </td><td class="mdescRight">Provides the fixed ciphertext length, if one exists. <a href="class_p_k___crypto_system.html#af415eacc974d297a03c4e7de710e5b4e">More...</a><br /></td></tr>
<tr class="separator:af415eacc974d297a03c4e7de710e5b4e inherit pub_methods_class_p_k___crypto_system"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a785f1a7390552faf18f9f91c6bc00429 inherit pub_methods_class_p_k___crypto_system"><td class="memItemLeft" align="right" valign="top">virtual size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="class_p_k___crypto_system.html#a785f1a7390552faf18f9f91c6bc00429">FixedMaxPlaintextLength</a> () const</td></tr>
<tr class="memdesc:a785f1a7390552faf18f9f91c6bc00429 inherit pub_methods_class_p_k___crypto_system"><td class="mdescLeft"> </td><td class="mdescRight">Provides the maximum plaintext length given a fixed ciphertext length. <a href="class_p_k___crypto_system.html#a785f1a7390552faf18f9f91c6bc00429">More...</a><br /></td></tr>
<tr class="separator:a785f1a7390552faf18f9f91c6bc00429 inherit pub_methods_class_p_k___crypto_system"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="inherit_header pub_methods_class_public_key_algorithm"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_class_public_key_algorithm')"><img src="closed.png" alt="-"/> Public Member Functions inherited from <a class="el" href="class_public_key_algorithm.html">PublicKeyAlgorithm</a></td></tr>
<tr class="memitem:a74b77db3086e07caf5506fda9ec204e7 inherit pub_methods_class_public_key_algorithm"><td class="memItemLeft" align="right" valign="top"><a class="el" href="class_crypto_material.html">CryptoMaterial</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="class_public_key_algorithm.html#a74b77db3086e07caf5506fda9ec204e7">AccessMaterial</a> ()</td></tr>
<tr class="memdesc:a74b77db3086e07caf5506fda9ec204e7 inherit pub_methods_class_public_key_algorithm"><td class="mdescLeft"> </td><td class="mdescRight">Retrieves a reference to a Public Key. <a href="class_public_key_algorithm.html#a74b77db3086e07caf5506fda9ec204e7">More...</a><br /></td></tr>
<tr class="separator:a74b77db3086e07caf5506fda9ec204e7 inherit pub_methods_class_public_key_algorithm"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a8c2bb02751348ff151ad9d4756cafd74 inherit pub_methods_class_public_key_algorithm"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="class_crypto_material.html">CryptoMaterial</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="class_public_key_algorithm.html#a8c2bb02751348ff151ad9d4756cafd74">GetMaterial</a> () const</td></tr>
<tr class="memdesc:a8c2bb02751348ff151ad9d4756cafd74 inherit pub_methods_class_public_key_algorithm"><td class="mdescLeft"> </td><td class="mdescRight">Retrieves a reference to a Public Key. <a href="class_public_key_algorithm.html#a8c2bb02751348ff151ad9d4756cafd74">More...</a><br /></td></tr>
<tr class="separator:a8c2bb02751348ff151ad9d4756cafd74 inherit pub_methods_class_public_key_algorithm"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a47cd0fed475280962ab6337c6c57c882 inherit pub_methods_class_public_key_algorithm"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="class_public_key.html">PublicKey</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="class_public_key_algorithm.html#a47cd0fed475280962ab6337c6c57c882">AccessPublicKey</a> ()=0</td></tr>
<tr class="memdesc:a47cd0fed475280962ab6337c6c57c882 inherit pub_methods_class_public_key_algorithm"><td class="mdescLeft"> </td><td class="mdescRight">Retrieves a reference to a Public Key. <a href="class_public_key_algorithm.html#a47cd0fed475280962ab6337c6c57c882">More...</a><br /></td></tr>
<tr class="separator:a47cd0fed475280962ab6337c6c57c882 inherit pub_methods_class_public_key_algorithm"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a49b6c27bffc8cc588e0db37071fde9f5 inherit pub_methods_class_public_key_algorithm"><td class="memItemLeft" align="right" valign="top">virtual const <a class="el" href="class_public_key.html">PublicKey</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="class_public_key_algorithm.html#a49b6c27bffc8cc588e0db37071fde9f5">GetPublicKey</a> () const</td></tr>
<tr class="memdesc:a49b6c27bffc8cc588e0db37071fde9f5 inherit pub_methods_class_public_key_algorithm"><td class="mdescLeft"> </td><td class="mdescRight">Retrieves a reference to a Public Key. <a href="class_public_key_algorithm.html#a49b6c27bffc8cc588e0db37071fde9f5">More...</a><br /></td></tr>
<tr class="separator:a49b6c27bffc8cc588e0db37071fde9f5 inherit pub_methods_class_public_key_algorithm"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="inherit_header pub_methods_class_algorithm"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_class_algorithm')"><img src="closed.png" alt="-"/> Public Member Functions inherited from <a class="el" href="class_algorithm.html">Algorithm</a></td></tr>
<tr class="memitem:a1c77f5117ca2cd881baf26a364cfc606 inherit pub_methods_class_algorithm"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_algorithm.html#a1c77f5117ca2cd881baf26a364cfc606">Algorithm</a> (bool checkSelfTestStatus=true)</td></tr>
<tr class="memdesc:a1c77f5117ca2cd881baf26a364cfc606 inherit pub_methods_class_algorithm"><td class="mdescLeft"> </td><td class="mdescRight">Interface for all crypto algorithms. <a href="class_algorithm.html#a1c77f5117ca2cd881baf26a364cfc606">More...</a><br /></td></tr>
<tr class="separator:a1c77f5117ca2cd881baf26a364cfc606 inherit pub_methods_class_algorithm"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a4f31510a192d1121856efe8ad0a9b844 inherit pub_methods_class_algorithm"><td class="memItemLeft" align="right" valign="top">virtual std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="class_algorithm.html#a4f31510a192d1121856efe8ad0a9b844">AlgorithmName</a> () const</td></tr>
<tr class="memdesc:a4f31510a192d1121856efe8ad0a9b844 inherit pub_methods_class_algorithm"><td class="mdescLeft"> </td><td class="mdescRight">Provides the name of this algorithm. <a href="class_algorithm.html#a4f31510a192d1121856efe8ad0a9b844">More...</a><br /></td></tr>
<tr class="separator:a4f31510a192d1121856efe8ad0a9b844 inherit pub_methods_class_algorithm"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="inherit_header pub_methods_class_clonable"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_class_clonable')"><img src="closed.png" alt="-"/> Public Member Functions inherited from <a class="el" href="class_clonable.html">Clonable</a></td></tr>
<tr class="memitem:ad0016ba2d505c23aa85aad49e6c19bb7 inherit pub_methods_class_clonable"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="class_clonable.html">Clonable</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="class_clonable.html#ad0016ba2d505c23aa85aad49e6c19bb7">Clone</a> () const</td></tr>
<tr class="memdesc:ad0016ba2d505c23aa85aad49e6c19bb7 inherit pub_methods_class_clonable"><td class="mdescLeft"> </td><td class="mdescRight">Copies this object. <a href="class_clonable.html#ad0016ba2d505c23aa85aad49e6c19bb7">More...</a><br /></td></tr>
<tr class="separator:ad0016ba2d505c23aa85aad49e6c19bb7 inherit pub_methods_class_clonable"><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>Interface for public-key encryptors. </p>
<p class="definition">Definition at line <a class="el" href="cryptlib_8h_source.html#l02526">2526</a> of file <a class="el" href="cryptlib_8h_source.html">cryptlib.h</a>.</p>
</div><h2 class="groupheader">Member Function Documentation</h2>
<a id="aecb519bc1cb0b261698be999bb5c8961"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aecb519bc1cb0b261698be999bb5c8961">◆ </a></span>Encrypt()</h2>
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<td class="memname">virtual void PK_Encryptor::Encrypt </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 byte * </td>
<td class="paramname"><em>plaintext</em>, </td>
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<td class="paramtype">size_t </td>
<td class="paramname"><em>plaintextLength</em>, </td>
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<td class="paramtype">byte * </td>
<td class="paramname"><em>ciphertext</em>, </td>
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<td class="paramtype">const <a class="el" href="class_name_value_pairs.html">NameValuePairs</a> & </td>
<td class="paramname"><em>parameters</em> = <code><a class="el" href="cryptlib_8h.html#a04be65ada92ccb1e6aac0d94b4cc394b">g_nullNameValuePairs</a></code> </td>
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<td>)</td>
<td></td><td> const</td>
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<span class="mlabels"><span class="mlabel">pure virtual</span></span> </td>
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<p>Encrypt a byte string. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<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">plaintext</td><td>the plaintext byte buffer </td></tr>
<tr><td class="paramname">plaintextLength</td><td>the size of the plaintext byte buffer </td></tr>
<tr><td class="paramname">ciphertext</td><td>a byte buffer to hold the encrypted string </td></tr>
<tr><td class="paramname">parameters</td><td>a set of <a class="el" href="class_name_value_pairs.html" title="Interface for retrieving values given their names. ">NameValuePairs</a> to initialize this object </td></tr>
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<dl class="section pre"><dt>Precondition</dt><dd><code>CiphertextLength(plaintextLength) != 0</code> ensures the plaintext isn't too large </dd>
<dd>
<code><a class="el" href="misc_8h.html#a2d7e4464ea73d6393ebe78f952253426" title="Counts elements in an array. ">COUNTOF(ciphertext)</a> == CiphertextLength(plaintextLength)</code> ensures the output byte buffer is large enough. </dd></dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="class_p_k___decryptor.html" title="Interface for public-key decryptors. ">PK_Decryptor</a> </dd></dl>
<p>Implemented in <a class="el" href="class_d_l___encryptor_base.html#ac16e4aa7be7b424de8e9816810b210c7">DL_EncryptorBase< T ></a>, <a class="el" href="class_d_l___encryptor_base.html#ac16e4aa7be7b424de8e9816810b210c7">DL_EncryptorBase< SCHEME_OPTIONS::Element ></a>, and <a class="el" href="class_t_f___encryptor_base.html#afa1feef1aeea65276bba4788f5d7b0b4">TF_EncryptorBase</a>.</p>
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<a id="a558cc0f957c7e1e448a746033549964d"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a558cc0f957c7e1e448a746033549964d">◆ </a></span>CreateEncryptionFilter()</h2>
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<td class="memname"><a class="el" href="class_buffered_transformation.html">BufferedTransformation</a> * PK_Encryptor::CreateEncryptionFilter </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="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="class_buffered_transformation.html">BufferedTransformation</a> * </td>
<td class="paramname"><em>attachment</em> = <code>NULL</code>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const <a class="el" href="class_name_value_pairs.html">NameValuePairs</a> & </td>
<td class="paramname"><em>parameters</em> = <code><a class="el" href="cryptlib_8h.html#a04be65ada92ccb1e6aac0d94b4cc394b">g_nullNameValuePairs</a></code> </td>
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<td></td>
<td>)</td>
<td></td><td> const</td>
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<p>Create a new encryption filter. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<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">attachment</td><td>an attached transformation </td></tr>
<tr><td class="paramname">parameters</td><td>a set of <a class="el" href="class_name_value_pairs.html" title="Interface for retrieving values given their names. ">NameValuePairs</a> to initialize this object</td></tr>
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<p><code>attachment</code> can be <code>NULL</code>. The caller is responsible for deleting the returned pointer. Encoding parameters should be passed in the "EP" channel. </p>
<p class="definition">Definition at line <a class="el" href="cryptlib_8cpp_source.html#l00862">862</a> of file <a class="el" href="cryptlib_8cpp_source.html">cryptlib.cpp</a>.</p>
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<hr/>The documentation for this class was generated from the following files:<ul>
<li><a class="el" href="cryptlib_8h_source.html">cryptlib.h</a></li>
<li><a class="el" href="cryptlib_8cpp_source.html">cryptlib.cpp</a></li>
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