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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=UTF-8"><title>Crypto++: PK_Decryptor Class Reference</title><link href="doxygen.css" rel="stylesheet" type="text/css"><link href="tabs.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.5.2 --><div class="tabs"> <ul> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="namespaces.html"><span>Namespaces</span></a></li> <li class="current"><a href="classes.html"><span>Classes</span></a></li> <li><a href="files.html"><span>Files</span></a></li> </ul></div><div class="tabs"> <ul> <li><a href="classes.html"><span>Alphabetical List</span></a></li> <li><a href="annotated.html"><span>Class List</span></a></li> <li><a href="hierarchy.html"><span>Class Hierarchy</span></a></li> <li><a href="functions.html"><span>Class Members</span></a></li> </ul></div><h1>PK_Decryptor Class Reference</h1><!-- doxytag: class="PK_Decryptor" --><!-- doxytag: inherits="PK_CryptoSystem,PrivateKeyAlgorithm" --><code>#include <<a class="el" href="cryptlib_8h-source.html">cryptlib.h</a>></code><p><p>Inheritance diagram for PK_Decryptor:<p><center><img src="class_p_k___decryptor.png" usemap="#PK_Decryptor_map" border="0" alt=""></center><map name="PK_Decryptor_map"><area href="class_p_k___crypto_system.html" alt="PK_CryptoSystem" shape="rect" coords="384,168,1143,192"><area href="class_private_key_algorithm.html" alt="PrivateKeyAlgorithm" shape="rect" coords="1153,168,1912,192"><area href="class_asymmetric_algorithm.html" alt="AsymmetricAlgorithm" shape="rect" coords="1153,112,1912,136"><area href="class_algorithm.html" alt="Algorithm" shape="rect" coords="1153,56,1912,80"><area href="class_clonable.html" alt="Clonable" shape="rect" coords="1153,0,1912,24"><area href="class_d_l___crypto_system_base.html" alt="DL_CryptoSystemBase< PK_Decryptor, DL_PrivateKey< SCHEME_OPTIONS::Element > >" shape="rect" coords="0,280,759,304"><area href="class_d_l___crypto_system_base.html" alt="DL_CryptoSystemBase< PK_Decryptor, DL_PrivateKey< T > >" shape="rect" coords="769,280,1528,304"><area href="class_p_k___fixed_length_crypto_system_impl.html" alt="PK_FixedLengthCryptoSystemImpl< PK_Decryptor >" shape="rect" coords="1538,280,2297,304"><area href="class_d_l___decryptor_base.html" alt="DL_DecryptorBase< SCHEME_OPTIONS::Element >" shape="rect" coords="0,336,759,360"><area href="class_d_l___decryptor_base.html" alt="DL_DecryptorBase< T >" shape="rect" coords="769,336,1528,360"><area href="class_t_f___crypto_system_base.html" alt="TF_CryptoSystemBase< PK_Decryptor, TF_Base< TrapdoorFunctionInverse, PK_EncryptionMessageEncodingMethod > >" shape="rect" coords="1538,336,2297,360"><area href="class_algorithm_impl.html" alt="AlgorithmImpl< DL_DecryptorBase< SCHEME_OPTIONS::Element >, SCHEME_OPTIONS::AlgorithmInfo >" shape="rect" coords="0,392,759,416"><area href="class_t_f___decryptor_base.html" alt="TF_DecryptorBase" shape="rect" coords="1538,392,2297,416"><area href="class_d_l___object_impl_base.html" alt="DL_ObjectImplBase< DL_DecryptorBase< SCHEME_OPTIONS::Element >, SCHEME_OPTIONS, SCHEME_OPTIONS::PrivateKey >" shape="rect" coords="0,448,759,472"><area href="class_algorithm_impl.html" alt="AlgorithmImpl< TF_DecryptorBase, SCHEME_OPTIONS::AlgorithmInfo >" shape="rect" coords="1538,448,2297,472"><area href="class_d_l___object_impl.html" alt="DL_ObjectImpl< DL_DecryptorBase< SCHEME_OPTIONS::Element >, SCHEME_OPTIONS, SCHEME_OPTIONS::PrivateKey >" shape="rect" coords="0,504,759,528"><area href="class_t_f___object_impl_base.html" alt="TF_ObjectImplBase< TF_DecryptorBase, SCHEME_OPTIONS, SCHEME_OPTIONS::PrivateKey >" shape="rect" coords="1538,504,2297,528"><area href="class_d_l___decryptor_impl.html" alt="DL_DecryptorImpl< SCHEME_OPTIONS >" shape="rect" coords="0,560,759,584"><area href="class_t_f___object_impl.html" alt="TF_ObjectImpl< TF_DecryptorBase, SCHEME_OPTIONS, SCHEME_OPTIONS::PrivateKey >" shape="rect" coords="1538,560,2297,584"><area href="class_t_f___decryptor_impl.html" alt="TF_DecryptorImpl< SCHEME_OPTIONS >" shape="rect" coords="1538,616,2297,640"></map><a href="class_p_k___decryptor-members.html">List of all members.</a><hr><a name="_details"></a><h2>Detailed Description</h2>interface for public-key decryptors <p><p>Definition at line <a class="el" href="cryptlib_8h-source.html#l01205">1205</a> of file <a class="el" href="cryptlib_8h-source.html">cryptlib.h</a>.<table border="0" cellpadding="0" cellspacing="0"><tr><td></td></tr><tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">virtual <a class="el" href="struct_decoding_result.html">DecodingResult</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_p_k___decryptor.html#b7466675ed050c440c16508f8a88cac1">Decrypt</a> (<a class="el" href="class_random_number_generator.html">RandomNumberGenerator</a> &rng, const byte *ciphertext, size_t ciphertextLength, byte *plaintext, const <a class="el" href="class_name_value_pairs.html">NameValuePairs</a> &parameters=<a class="el" href="cryptlib_8h.html#d3205973dd1afa14090a683154c1109c">g_nullNameValuePairs</a>) const =0</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">decrypt a byte string, and return the length of plaintext <a href="#b7466675ed050c440c16508f8a88cac1"></a><br></td></tr><tr><td class="memItemLeft" nowrap 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___decryptor.html#c98bd1dac38f73bdc7d0930053ce9f56">CreateDecryptionFilter</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#d3205973dd1afa14090a683154c1109c">g_nullNameValuePairs</a>) const</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">create a new decryption filter <a href="#c98bd1dac38f73bdc7d0930053ce9f56"></a><br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="6cdadc344ea0cc9804fded094f7b514a"></a><!-- doxytag: member="PK_Decryptor::FixedLengthDecrypt" ref="6cdadc344ea0cc9804fded094f7b514a" args="(RandomNumberGenerator &rng, const byte *ciphertext, byte *plaintext, const NameValuePairs &parameters=g_nullNameValuePairs) const" --><a class="el" href="struct_decoding_result.html">DecodingResult</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_p_k___decryptor.html#6cdadc344ea0cc9804fded094f7b514a">FixedLengthDecrypt</a> (<a class="el" href="class_random_number_generator.html">RandomNumberGenerator</a> &rng, const byte *ciphertext, byte *plaintext, const <a class="el" href="class_name_value_pairs.html">NameValuePairs</a> &parameters=<a class="el" href="cryptlib_8h.html#d3205973dd1afa14090a683154c1109c">g_nullNameValuePairs</a>) const</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">decrypt a fixed size ciphertext <br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">virtual size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="class_p_k___crypto_system.html#a4a3552c933a36b3aea26f31d00bee9b">MaxPlaintextLength</a> (size_t ciphertextLength) const =0</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">maximum length of plaintext for a given ciphertext length <a href="#a4a3552c933a36b3aea26f31d00bee9b"></a><br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">virtual size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="class_p_k___crypto_system.html#bf04a4e08fb69a1a118bad3e998ef6a6">CiphertextLength</a> (size_t plaintextLength) const =0</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">calculate length of ciphertext given length of plaintext <a href="#bf04a4e08fb69a1a118bad3e998ef6a6"></a><br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">virtual bool </td><td class="memItemRight" valign="bottom"><a class="el" href="class_p_k___crypto_system.html#294c4664af51a72112db1f04e6ef9049">ParameterSupported</a> (const char *name) const =0</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">this object supports the use of the parameter with the given name <a href="#294c4664af51a72112db1f04e6ef9049"></a><br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">virtual size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="class_p_k___crypto_system.html#f415eacc974d297a03c4e7de710e5b4e">FixedCiphertextLength</a> () const</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">return fixed ciphertext length, if one exists, otherwise return 0 <a href="#f415eacc974d297a03c4e7de710e5b4e"></a><br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="785f1a7390552faf18f9f91c6bc00429"></a><!-- doxytag: member="PK_Decryptor::FixedMaxPlaintextLength" ref="785f1a7390552faf18f9f91c6bc00429" args="() const" -->virtual size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="class_p_k___crypto_system.html#785f1a7390552faf18f9f91c6bc00429">FixedMaxPlaintextLength</a> () const</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">return maximum plaintext length given the fixed ciphertext length, if one exists, otherwise return 0 <br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="48cf4528f16263f2200d5b908a0b8ffb"></a><!-- doxytag: member="PK_Decryptor::AccessMaterial" ref="48cf4528f16263f2200d5b908a0b8ffb" args="()" --><a class="el" href="class_crypto_material.html">CryptoMaterial</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="class_private_key_algorithm.html#48cf4528f16263f2200d5b908a0b8ffb">AccessMaterial</a> ()</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">returns a reference to the crypto material used by this object <br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="59f3867165685cc6ac6be3f53d5f371b"></a><!-- doxytag: member="PK_Decryptor::GetMaterial" ref="59f3867165685cc6ac6be3f53d5f371b" args="() const" -->const <a class="el" href="class_crypto_material.html">CryptoMaterial</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="class_private_key_algorithm.html#59f3867165685cc6ac6be3f53d5f371b">GetMaterial</a> () const</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">returns a const reference to the crypto material used by this object <br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="e2085815947c2ae7b3f9f614612e0c17"></a><!-- doxytag: member="PK_Decryptor::AccessPrivateKey" ref="e2085815947c2ae7b3f9f614612e0c17" args="()=0" -->virtual <a class="el" href="class_private_key.html">PrivateKey</a> & </td><td class="memItemRight" valign="bottom"><b>AccessPrivateKey</b> ()=0</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="b36fe7af04ef624d38c0c06da5b89bb4"></a><!-- doxytag: member="PK_Decryptor::GetPrivateKey" ref="b36fe7af04ef624d38c0c06da5b89bb4" args="() const" -->virtual const <a class="el" href="class_private_key.html">PrivateKey</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="class_private_key_algorithm.html#b36fe7af04ef624d38c0c06da5b89bb4">GetPrivateKey</a> () const</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="522dbfcd5c1a46bf1be301cec26d6534"></a><!-- doxytag: member="PK_Decryptor::BERDecode" ref="522dbfcd5c1a46bf1be301cec26d6534" args="(BufferedTransformation &bt)" -->void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_asymmetric_algorithm.html#522dbfcd5c1a46bf1be301cec26d6534">BERDecode</a> (<a class="el" href="class_buffered_transformation.html">BufferedTransformation</a> &bt)</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">for backwards compatibility, calls <a class="el" href="class_asymmetric_algorithm.html#d99d55413166b69a0a12e10d111926c8" title="returns a reference to the crypto material used by this object">AccessMaterial()</a>.Load(bt) <br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="2d704079890783422b0a44653480ab83"></a><!-- doxytag: member="PK_Decryptor::DEREncode" ref="2d704079890783422b0a44653480ab83" args="(BufferedTransformation &bt) const " -->void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_asymmetric_algorithm.html#2d704079890783422b0a44653480ab83">DEREncode</a> (<a class="el" href="class_buffered_transformation.html">BufferedTransformation</a> &bt) const </td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">for backwards compatibility, calls <a class="el" href="class_asymmetric_algorithm.html#eafe2b12d8353b6c639be41b57ef25de" title="returns a const reference to the crypto material used by this object">GetMaterial()</a>.Save(bt) <br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="4f31510a192d1121856efe8ad0a9b844"></a><!-- doxytag: member="PK_Decryptor::AlgorithmName" ref="4f31510a192d1121856efe8ad0a9b844" args="() const" -->virtual std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="class_algorithm.html#4f31510a192d1121856efe8ad0a9b844">AlgorithmName</a> () const</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">returns name of this algorithm, not universally implemented yet <br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="d0016ba2d505c23aa85aad49e6c19bb7"></a><!-- doxytag: member="PK_Decryptor::Clone" ref="d0016ba2d505c23aa85aad49e6c19bb7" args="() const" -->virtual <a class="el" href="class_clonable.html">Clonable</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="class_clonable.html#d0016ba2d505c23aa85aad49e6c19bb7">Clone</a> () const</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">this is not implemented by most classes yet <br></td></tr></table><hr><h2>Member Function Documentation</h2><a class="anchor" name="b7466675ed050c440c16508f8a88cac1"></a><!-- doxytag: member="PK_Decryptor::Decrypt" ref="b7466675ed050c440c16508f8a88cac1" args="(RandomNumberGenerator &rng, const byte *ciphertext, size_t ciphertextLength, byte *plaintext, const NameValuePairs &parameters=g_nullNameValuePairs) const =0" --><div class="memitem"><div class="memproto"> <table class="memname"> <tr> <td class="memname">virtual <a class="el" href="struct_decoding_result.html">DecodingResult</a> PK_Decryptor::Decrypt </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> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">const byte * </td> <td class="paramname"> <em>ciphertext</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">size_t </td> <td class="paramname"> <em>ciphertextLength</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">byte * </td> <td class="paramname"> <em>plaintext</em>, </td> </tr> <tr> <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#d3205973dd1afa14090a683154c1109c">g_nullNameValuePairs</a></code></td><td> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td><td width="100%"> const<code> [pure virtual]</code></td> </tr> </table></div><div class="memdoc"><p>⌨️ 快捷键说明
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