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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>Crypto++: TF_DecryptorBase class Reference</title><link href="doxygen.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.3.2 --><div class="qindex"><a class="qindex" href="index.html">Main Page</a> | <a class="qindex" href="namespaces.html">Namespace List</a> | <a class="qindex" href="hierarchy.html">Class Hierarchy</a> | <a class="qindex" href="classes.html">Alphabetical List</a> | <a class="qindex" href="annotated.html">Compound List</a> | <a class="qindex" href="files.html">File List</a> | <a class="qindex" href="namespacemembers.html">Namespace Members</a> | <a class="qindex" href="functions.html">Compound Members</a> | <a class="qindex" href="globals.html">File Members</a></div><h1>TF_DecryptorBase Class Reference</h1><code>#include <<a class="el" href="pubkey_8h-source.html">pubkey.h</a>></code><p><p>Inheritance diagram for TF_DecryptorBase:<p><center><img src="class_t_f___decryptor_base.png" usemap="#TF_DecryptorBase_map" border="0" alt=""></center><map name="TF_DecryptorBase_map"><area href="class_t_f___crypto_system_base.html" alt="TF_CryptoSystemBase< PK_FixedLengthDecryptor, TF_Base< TrapdoorFunctionInverse > >" shape="rect" coords="1011,336,1579,360"><area href="class_p_k___fixed_length_decryptor.html" alt="PK_FixedLengthDecryptor" shape="rect" coords="722,280,1290,304"><area href="class_t_f___base.html" alt="TF_Base< TrapdoorFunctionInverse >" shape="rect" coords="1300,280,1868,304"><area href="class_p_k___decryptor.html" alt="PK_Decryptor" shape="rect" coords="289,224,857,248"><area href="class_p_k___fixed_length_crypto_system.html" alt="PK_FixedLengthCryptoSystem" shape="rect" coords="1156,224,1724,248"><area href="class_p_k___crypto_system.html" alt="PK_CryptoSystem" shape="rect" coords="0,168,568,192"><area href="class_private_key_algorithm.html" alt="PrivateKeyAlgorithm" shape="rect" coords="578,168,1146,192"><area href="class_p_k___crypto_system.html" alt="PK_CryptoSystem" shape="rect" coords="1156,168,1724,192"><area href="class_asymmetric_algorithm.html" alt="AsymmetricAlgorithm" shape="rect" coords="578,112,1146,136"><area href="class_algorithm.html" alt="Algorithm" shape="rect" coords="578,56,1146,80"><area href="class_clonable.html" alt="Clonable" shape="rect" coords="578,0,1146,24"><area href="class_t_f___object_impl_base.html" alt="TF_ObjectImplBase< TF_DecryptorBase, SCHEME_OPTIONS, SCHEME_OPTIONS::PrivateKey >" shape="rect" coords="1011,504,1579,528"><area href="class_t_f___object_impl.html" alt="TF_ObjectImpl< TF_DecryptorBase, SCHEME_OPTIONS, SCHEME_OPTIONS::PrivateKey >" shape="rect" coords="1011,560,1579,584"><area href="class_t_f___private_object_impl.html" alt="TF_PrivateObjectImpl< TF_DecryptorBase, SCHEME_OPTIONS >" shape="rect" coords="1011,616,1579,640"><area href="class_t_f___decryptor_impl.html" alt="TF_DecryptorImpl< SCHEME_OPTIONS >" shape="rect" coords="1011,672,1579,696"></map><a href="class_t_f___decryptor_base-members.html">List of all members.</a><hr><a name="_details"></a><h2>Detailed Description</h2><p><p>Definition at line <a class="el" href="pubkey_8h-source.html#l00167">167</a> of file <a class="el" href="pubkey_8h-source.html">pubkey.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="el" href="struct_decoding_result.html">DecodingResult</a> </td><td class="memItemRight" valign=bottom><a class="el" href="class_t_f___decryptor_base.html#_t_f___private_object_impl_3_01_t_f___decryptor_base_00_01_s_c_h_e_m_e___o_p_t_i_o_n_s_01_4a10">FixedLengthDecrypt</a> (const byte *cipherText, byte *plainText) const</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">decrypt a byte string, and return the length of plaintext </em> <a href="#_t_f___private_object_impl_3_01_t_f___decryptor_base_00_01_s_c_h_e_m_e___o_p_t_i_o_n_s_01_4a10"></a><em><br><br></td></tr><tr><td class="memItemLeft" nowrap align=right valign=top><a name="_t_f___crypto_system_basea0" doxytag="TF_DecryptorBase::FixedMaxPlaintextLength"></a>unsigned int </td><td class="memItemRight" valign=bottom><b>FixedMaxPlaintextLength</b> () const</td></tr><tr><td class="memItemLeft" nowrap align=right valign=top><a name="_t_f___crypto_system_basea1" doxytag="TF_DecryptorBase::FixedCiphertextLength"></a>unsigned int </td><td class="memItemRight" valign=bottom><b>FixedCiphertextLength</b> () const</td></tr><tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="struct_decoding_result.html">DecodingResult</a> </td><td class="memItemRight" valign=bottom><a class="el" href="class_t_f___decryptor_base.html#_t_f___private_object_impl_3_01_t_f___decryptor_base_00_01_s_c_h_e_m_e___o_p_t_i_o_n_s_01_4a13">Decrypt</a> (const byte *cipherText, unsigned int cipherTextLength, byte *plainText) const</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">decrypt a byte string, and return the length of plaintext </em> <a href="#_t_f___private_object_impl_3_01_t_f___decryptor_base_00_01_s_c_h_e_m_e___o_p_t_i_o_n_s_01_4a13"></a><em><br><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_t_f___decryptor_base.html#_t_f___private_object_impl_3_01_t_f___decryptor_base_00_01_s_c_h_e_m_e___o_p_t_i_o_n_s_01_4a14">CreateDecryptionFilter</a> (<a class="el" href="class_buffered_transformation.html">BufferedTransformation</a> *attachment=NULL) const</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">create a new decryption filter </em> <a href="#_t_f___private_object_impl_3_01_t_f___decryptor_base_00_01_s_c_h_e_m_e___o_p_t_i_o_n_s_01_4a14"></a><em><br><br></td></tr><tr><td class="memItemLeft" nowrap align=right valign=top>virtual unsigned int </td><td class="memItemRight" valign=bottom><a class="el" href="class_t_f___decryptor_base.html#_t_f___public_object_impl_3_01_t_f___encryptor_base_00_01_s_c_h_e_m_e___o_p_t_i_o_n_s_01_4a13">MaxPlaintextLength</a> (unsigned int cipherTextLength) const=0</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">maximum length of plaintext for a given ciphertext length </em> <a href="#_t_f___public_object_impl_3_01_t_f___encryptor_base_00_01_s_c_h_e_m_e___o_p_t_i_o_n_s_01_4a13"></a><em><br><br></td></tr><tr><td class="memItemLeft" nowrap align=right valign=top>unsigned int </td><td class="memItemRight" valign=bottom><a class="el" href="class_t_f___decryptor_base.html#_t_f___public_object_impl_3_01_t_f___encryptor_base_00_01_s_c_h_e_m_e___o_p_t_i_o_n_s_01_4a14">MaxPlaintextLength</a> (unsigned int cipherTextLength) const</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">maximum length of plaintext for a given ciphertext length </em> <a href="#_t_f___public_object_impl_3_01_t_f___encryptor_base_00_01_s_c_h_e_m_e___o_p_t_i_o_n_s_01_4a14"></a><em><br><br></td></tr><tr><td class="memItemLeft" nowrap align=right valign=top>virtual unsigned int </td><td class="memItemRight" valign=bottom><a class="el" href="class_t_f___decryptor_base.html#_t_f___public_object_impl_3_01_t_f___encryptor_base_00_01_s_c_h_e_m_e___o_p_t_i_o_n_s_01_4a15">CiphertextLength</a> (unsigned int plainTextLength) const=0</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">calculate length of ciphertext given length of plaintext </em> <a href="#_t_f___public_object_impl_3_01_t_f___encryptor_base_00_01_s_c_h_e_m_e___o_p_t_i_o_n_s_01_4a15"></a><em><br><br></td></tr><tr><td class="memItemLeft" nowrap align=right valign=top>unsigned int </td><td class="memItemRight" valign=bottom><a class="el" href="class_t_f___decryptor_base.html#_t_f___public_object_impl_3_01_t_f___encryptor_base_00_01_s_c_h_e_m_e___o_p_t_i_o_n_s_01_4a16">CiphertextLength</a> (unsigned int plainTextLength) const</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">calculate length of ciphertext given length of plaintext </em> <a href="#_t_f___public_object_impl_3_01_t_f___encryptor_base_00_01_s_c_h_e_m_e___o_p_t_i_o_n_s_01_4a16"></a><em><br><br></td></tr><tr><td class="memItemLeft" nowrap align=right valign=top><a name="_t_f___private_object_impl_3_01_t_f___digest_signer_base_00_01_s_c_h_e_m_e___o_p_t_i_o_n_s_01_4a13" doxytag="TF_DecryptorBase::AccessMaterial"></a><a class="el" href="class_crypto_material.html">CryptoMaterial</a> & </td><td class="memItemRight" valign=bottom><a class="el" href="class_t_f___decryptor_base.html#_t_f___private_object_impl_3_01_t_f___digest_signer_base_00_01_s_c_h_e_m_e___o_p_t_i_o_n_s_01_4a13">AccessMaterial</a> ()</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">returns a reference to the crypto material used by this object <br><br></td></tr><tr><td class="memItemLeft" nowrap align=right valign=top><a name="_t_f___private_object_impl_3_01_t_f___digest_signer_base_00_01_s_c_h_e_m_e___o_p_t_i_o_n_s_01_4a14" doxytag="TF_DecryptorBase::GetMaterial"></a>const <a class="el" href="class_crypto_material.html">CryptoMaterial</a> & </td><td class="memItemRight" valign=bottom><a class="el" href="class_t_f___decryptor_base.html#_t_f___private_object_impl_3_01_t_f___digest_signer_base_00_01_s_c_h_e_m_e___o_p_t_i_o_n_s_01_4a14">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><br></td></tr><tr><td class="memItemLeft" nowrap align=right valign=top><a name="_t_f___digest_signer_basea5" doxytag="TF_DecryptorBase::AccessPrivateKey"></a>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 name="_t_f___digest_signer_basea6" doxytag="TF_DecryptorBase::GetPrivateKey"></a>virtual const <a class="el" href="class_private_key.html">PrivateKey</a> & </td><td class="memItemRight" valign=bottom><b>GetPrivateKey</b> () const</td></tr><tr><td class="memItemLeft" nowrap align=right valign=top><a name="_x_t_r___d_ha24" doxytag="TF_DecryptorBase::BERDecode"></a>void </td><td class="memItemRight" valign=bottom><a class="el" href="class_t_f___decryptor_base.html#_x_t_r___d_ha24">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#_asymmetric_algorithma0">AccessMaterial()</a>.Load(bt) <br><br></td></tr><tr><td class="memItemLeft" nowrap align=right valign=top><a name="_verifier_with_recovery_templatea23" doxytag="TF_DecryptorBase::DEREncode"></a>void </td><td class="memItemRight" valign=bottom><a class="el" href="class_t_f___decryptor_base.html#_verifier_with_recovery_templatea23">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#_asymmetric_algorithma1">GetMaterial()</a>.Save(bt) <br><br></td></tr><tr><td class="memItemLeft" nowrap align=right valign=top><a name="_zlib_decompressora17" doxytag="TF_DecryptorBase::AlgorithmName"></a>virtual std::string </td><td class="memItemRight" valign=bottom><a class="el" href="class_t_f___decryptor_base.html#_zlib_decompressora17">AlgorithmName</a> () const</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">returns name of this algorithm, not universally implemented yet <br><br></td></tr><tr><td class="memItemLeft" nowrap align=right valign=top><a name="_zlib_decompressora18" doxytag="TF_DecryptorBase::Clone"></a>virtual <a class="el" href="class_clonable.html">Clonable</a> * </td><td class="memItemRight" valign=bottom><a class="el" href="class_t_f___decryptor_base.html#_zlib_decompressora18">Clone</a> () const</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">this is not implemented by most classes yet <br><br></td></tr><tr><td colspan=2><br><h2>Protected Types</h2></td></tr><tr><td class="memItemLeft" nowrap align=right valign=top><a name="_t_f___basex0" doxytag="TF_DecryptorBase::TrapdoorFunctionInterface"></a>typedef <a class="el" href="class_trapdoor_function_inverse.html">TrapdoorFunctionInverse</a> </td><td class="memItemRight" valign=bottom><b>TrapdoorFunctionInterface</b></td></tr><tr><td colspan=2><br><h2>Protected Member Functions</h2></td></tr><tr><td class="memItemLeft" nowrap align=right valign=top><a name="_t_f___crypto_system_baseb0" doxytag="TF_DecryptorBase::PaddedBlockBitLength"></a>unsigned int </td><td class="memItemRight" valign=bottom><b>PaddedBlockBitLength</b> () const</td></tr><tr><td class="memItemLeft" nowrap align=right valign=top><a name="_t_f___baseb0" doxytag="TF_DecryptorBase::PaddedBlockByteLength"></a>unsigned int </td><td class="memItemRight" valign=bottom><b>PaddedBlockByteLength</b> () const</td></tr><tr><td class="memItemLeft" nowrap align=right valign=top><a name="_t_f___baseb1" doxytag="TF_DecryptorBase::GetTrapdoorFunctionBounds"></a>virtual const <a class="el" href="class_trapdoor_function_bounds.html">TrapdoorFunctionBounds</a> & </td><td class="memItemRight" valign=bottom><b>GetTrapdoorFunctionBounds</b> () const=0</td></tr><tr><td class="memItemLeft" nowrap align=right valign=top><a name="_t_f___baseb2" doxytag="TF_DecryptorBase::GetPaddingAlgorithm"></a>virtual const <a class="el" href="class_p_k___padding_algorithm.html">PK_PaddingAlgorithm</a> & </td><td class="memItemRight" valign=bottom><b>GetPaddingAlgorithm</b> () const=0</td></tr><tr><td class="memItemLeft" nowrap align=right valign=top><a name="_t_f___baseb4" doxytag="TF_DecryptorBase::GetTrapdoorFunctionInterface"></a>virtual const TrapdoorFunctionInterface & </td><td class="memItemRight" valign=bottom><b>GetTrapdoorFunctionInterface</b> () const=0</td></tr></table><hr><h2>Member Function Documentation</h2><a name="_t_f___private_object_impl_3_01_t_f___decryptor_base_00_01_s_c_h_e_m_e___o_p_t_i_o_n_s_01_4a10" doxytag="TF_DecryptorBase::FixedLengthDecrypt"></a><p><table class="mdTable" width="100%" cellpadding="2" cellspacing="0"> <tr> <td class="mdRow"> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td class="md" nowrap valign="top"> <a class="el" href="struct_decoding_result.html">DecodingResult</a> TF_DecryptorBase::FixedLengthDecrypt </td> <td class="md" valign="top">( </td> <td class="md" nowrap valign="top">const byte * </td> <td class="mdname" nowrap> <em>cipherText</em>, </td> </tr> <tr> <td></td> <td></td> <td class="md" nowrap>byte * </td> <td class="mdname" nowrap> <em>plainText</em></td> </tr> <tr> <td></td> <td class="md">) </td> <td class="md" colspan="2"> const<code> [virtual]</code></td> </tr> </table> </td> </tr></table><table cellspacing=5 cellpadding=0 border=0> <tr> <td> </td> <td><p>decrypt a byte string, and return the length of plaintext <p><dl compact><dt><b>Precondition:</b></dt><dd>length of cipherText == CipherTextLength() <p>size of plainText == MaxPlainTextLength() </dd></dl><dl compact><dt><b>Returns:</b></dt><dd>the actual length of the plaintext, or 0 if decryption fails.</dd></dl><p>Implements <a class="el" href="class_p_k___fixed_length_decryptor.html#_t_f___crypto_system_base_3_01_p_k___fixed_length_decryptor_00_01_t_f___base_3_01_trapdoor_function_inverse_01_4_01_4a2">PK_FixedLengthDecryptor</a>.<p>Definition at line <a class="el" href="pubkey_8cpp-source.html#l00041">41</a> of file <a class="el" href="pubkey_8cpp-source.html">pubkey.cpp</a>.<p>References <a class="el" href="secblock_8h-source.html#l00264">SecBlock< byte >::size()</a>, and <a class="el" href="integer_8cpp-source.html#l02610">Integer::Zero()</a>. </td> </tr></table><a name="_t_f___private_object_impl_3_01_t_f___decryptor_base_00_01_s_c_h_e_m_e___o_p_t_i_o_n_s_01_4a13" doxytag="TF_DecryptorBase::Decrypt"></a><p><table class="mdTable" width="100%" cellpadding="2" cellspacing="0"> <tr> <td class="mdRow"> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td class="md" nowrap valign="top"> <a class="el" href="struct_decoding_result.html">DecodingResult</a> PK_FixedLengthDecryptor::Decrypt </td> <td class="md" valign="top">( </td> <td class="md" nowrap valign="top">const byte * </td> <td class="mdname" nowrap> <em>cipherText</em>, </td> </tr> <tr> <td></td> <td></td> <td class="md" nowrap>unsigned int </td> <td class="mdname" nowrap> <em>cipherTextLength</em>, </td> </tr> <tr> <td></td> <td></td> <td class="md" nowrap>byte * </td> <td class="mdname" nowrap> <em>plainText</em></td> </tr> <tr> <td></td> <td class="md">) </td> <td class="md" colspan="2"> const<code> [virtual, inherited]</code></td> </tr> </table> </td> </tr></table><table cellspacing=5 cellpadding=0 border=0> <tr> <td> ⌨️ 快捷键说明
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