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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_CryptoSystem 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_CryptoSystem Class Reference</h1><!-- doxytag: class="PK_CryptoSystem" --><code>#include <<a class="el" href="cryptlib_8h-source.html">cryptlib.h</a>></code><p><p>Inheritance diagram for PK_CryptoSystem:<p><center><img src="class_p_k___crypto_system.png" usemap="#PK_CryptoSystem_map" border="0" alt=""></center><map name="PK_CryptoSystem_map"><area href="class_p_k___decryptor.html" alt="PK_Decryptor" shape="rect" coords="769,56,1528,80"><area href="class_p_k___encryptor.html" alt="PK_Encryptor" shape="rect" coords="3076,56,3835,80"><area href="class_d_l___crypto_system_base.html" alt="DL_CryptoSystemBase< PK_Decryptor, DL_PrivateKey< SCHEME_OPTIONS::Element > >" shape="rect" coords="0,112,759,136"><area href="class_d_l___crypto_system_base.html" alt="DL_CryptoSystemBase< PK_Decryptor, DL_PrivateKey< T > >" shape="rect" coords="769,112,1528,136"><area href="class_p_k___fixed_length_crypto_system_impl.html" alt="PK_FixedLengthCryptoSystemImpl< PK_Decryptor >" shape="rect" coords="1538,112,2297,136"><area href="class_d_l___crypto_system_base.html" alt="DL_CryptoSystemBase< PK_Encryptor, DL_PublicKey< SCHEME_OPTIONS::Element > >" shape="rect" coords="2307,112,3066,136"><area href="class_d_l___crypto_system_base.html" alt="DL_CryptoSystemBase< PK_Encryptor, DL_PublicKey< T > >" shape="rect" coords="3076,112,3835,136"><area href="class_p_k___fixed_length_crypto_system_impl.html" alt="PK_FixedLengthCryptoSystemImpl< PK_Encryptor >" shape="rect" coords="3845,112,4604,136"><area href="class_d_l___decryptor_base.html" alt="DL_DecryptorBase< SCHEME_OPTIONS::Element >" shape="rect" coords="0,168,759,192"><area href="class_d_l___decryptor_base.html" alt="DL_DecryptorBase< T >" shape="rect" coords="769,168,1528,192"><area href="class_t_f___crypto_system_base.html" alt="TF_CryptoSystemBase< PK_Decryptor, TF_Base< TrapdoorFunctionInverse, PK_EncryptionMessageEncodingMethod > >" shape="rect" coords="1538,168,2297,192"><area href="class_d_l___encryptor_base.html" alt="DL_EncryptorBase< SCHEME_OPTIONS::Element >" shape="rect" coords="2307,168,3066,192"><area href="class_d_l___encryptor_base.html" alt="DL_EncryptorBase< T >" shape="rect" coords="3076,168,3835,192"><area href="class_t_f___crypto_system_base.html" alt="TF_CryptoSystemBase< PK_Encryptor, TF_Base< RandomizedTrapdoorFunction, PK_EncryptionMessageEncodingMethod > >" shape="rect" coords="3845,168,4604,192"><area href="class_algorithm_impl.html" alt="AlgorithmImpl< DL_DecryptorBase< SCHEME_OPTIONS::Element >, SCHEME_OPTIONS::AlgorithmInfo >" shape="rect" coords="0,224,759,248"><area href="class_t_f___decryptor_base.html" alt="TF_DecryptorBase" shape="rect" coords="1538,224,2297,248"><area href="class_algorithm_impl.html" alt="AlgorithmImpl< DL_EncryptorBase< SCHEME_OPTIONS::Element >, SCHEME_OPTIONS::AlgorithmInfo >" shape="rect" coords="2307,224,3066,248"><area href="class_t_f___encryptor_base.html" alt="TF_EncryptorBase" shape="rect" coords="3845,224,4604,248"><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="0,280,759,304"><area href="class_algorithm_impl.html" alt="AlgorithmImpl< TF_DecryptorBase, SCHEME_OPTIONS::AlgorithmInfo >" shape="rect" coords="1538,280,2297,304"><area href="class_d_l___object_impl_base.html" alt="DL_ObjectImplBase< DL_EncryptorBase< SCHEME_OPTIONS::Element >, SCHEME_OPTIONS, SCHEME_OPTIONS::PublicKey >" shape="rect" coords="2307,280,3066,304"><area href="class_algorithm_impl.html" alt="AlgorithmImpl< TF_EncryptorBase, SCHEME_OPTIONS::AlgorithmInfo >" shape="rect" coords="3845,280,4604,304"><area href="class_d_l___object_impl.html" alt="DL_ObjectImpl< DL_DecryptorBase< SCHEME_OPTIONS::Element >, SCHEME_OPTIONS, SCHEME_OPTIONS::PrivateKey >" shape="rect" coords="0,336,759,360"><area href="class_t_f___object_impl_base.html" alt="TF_ObjectImplBase< TF_DecryptorBase, SCHEME_OPTIONS, SCHEME_OPTIONS::PrivateKey >" shape="rect" coords="1538,336,2297,360"><area href="class_d_l___object_impl.html" alt="DL_ObjectImpl< DL_EncryptorBase< SCHEME_OPTIONS::Element >, SCHEME_OPTIONS, SCHEME_OPTIONS::PublicKey >" shape="rect" coords="2307,336,3066,360"><area href="class_t_f___object_impl_base.html" alt="TF_ObjectImplBase< TF_EncryptorBase, SCHEME_OPTIONS, SCHEME_OPTIONS::PublicKey >" shape="rect" coords="3845,336,4604,360"><area href="class_d_l___decryptor_impl.html" alt="DL_DecryptorImpl< SCHEME_OPTIONS >" shape="rect" coords="0,392,759,416"><area href="class_t_f___object_impl.html" alt="TF_ObjectImpl< TF_DecryptorBase, SCHEME_OPTIONS, SCHEME_OPTIONS::PrivateKey >" shape="rect" coords="1538,392,2297,416"><area href="class_d_l___encryptor_impl.html" alt="DL_EncryptorImpl< SCHEME_OPTIONS >" shape="rect" coords="2307,392,3066,416"><area href="class_t_f___object_impl.html" alt="TF_ObjectImpl< TF_EncryptorBase, SCHEME_OPTIONS, SCHEME_OPTIONS::PublicKey >" shape="rect" coords="3845,392,4604,416"><area href="class_t_f___decryptor_impl.html" alt="TF_DecryptorImpl< SCHEME_OPTIONS >" shape="rect" coords="1538,448,2297,472"><area href="class_t_f___encryptor_impl.html" alt="TF_EncryptorImpl< SCHEME_OPTIONS >" shape="rect" coords="3845,448,4604,472"></map><a href="class_p_k___crypto_system-members.html">List of all members.</a><hr><a name="_details"></a><h2>Detailed Description</h2>interface for public-key encryptors and decryptors <p>This class provides an interface common to encryptors and decryptors for querying their plaintext and ciphertext lengths. <p><p>Definition at line <a class="el" href="cryptlib_8h-source.html#l01145">1145</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"><a class="anchor" name="fb7c3e97dfefea458c6bfc9ca38dac5e"></a><!-- doxytag: member="PK_CryptoSystem::~PK_CryptoSystem" ref="fb7c3e97dfefea458c6bfc9ca38dac5e" args="()" -->virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="class_p_k___crypto_system.html#fb7c3e97dfefea458c6bfc9ca38dac5e">~PK_CryptoSystem</a> ()</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_CryptoSystem::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></table><hr><h2>Member Function Documentation</h2><a class="anchor" name="a4a3552c933a36b3aea26f31d00bee9b"></a><!-- doxytag: member="PK_CryptoSystem::MaxPlaintextLength" ref="a4a3552c933a36b3aea26f31d00bee9b" args="(size_t ciphertextLength) const =0" --><div class="memitem"><div class="memproto"> <table class="memname"> <tr> <td class="memname">virtual size_t PK_CryptoSystem::MaxPlaintextLength </td> <td>(</td> <td class="paramtype">size_t </td> <td class="paramname"> <em>ciphertextLength</em> </td>⌨️ 快捷键说明
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