class_t_f___decryptor_base.html

Crypto++是一个非常强大的密码学库,主要是功能全

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decrypt a byte string, and return the length of plaintext 
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<dl compact><dt><b>Precondition:</b></dt><dd>size of plainText == MaxPlainTextLength(cipherTextLength) bytes. </dd></dl>
<dl compact><dt><b>Returns:</b></dt><dd>the actual length of the plaintext, or 0 if decryption fails.</dd></dl>

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Implements <a class="el" href="class_p_k___decryptor.html#_p_k___decryptora0">PK_Decryptor</a>.
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Definition at line <a class="el" href="cryptlib_8cpp-source.html#l00611">611</a> of file <a class="el" href="cryptlib_8cpp-source.html">cryptlib.cpp</a>.
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References <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::FixedLengthDecrypt()</a>.    </td>
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<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_4a14" doxytag="TF_DecryptorBase::CreateDecryptionFilter"></a><p>
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          <td class="md" nowrap valign="top"> <a class="el" href="class_buffered_transformation.html">BufferedTransformation</a> * PK_Decryptor::CreateDecryptionFilter </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top"><a class="el" href="class_buffered_transformation.html">BufferedTransformation</a> *&nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>attachment</em> = NULL          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap> const<code> [virtual, inherited]</code></td>
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create a new decryption filter 
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<dl compact><dt><b>Note:</b></dt><dd>caller is responsible for deleting the returned pointer</dd></dl>

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Definition at line <a class="el" href="cryptlib_8cpp-source.html#l00551">551</a> of file <a class="el" href="cryptlib_8cpp-source.html">cryptlib.cpp</a>.    </td>
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<a name="_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" doxytag="TF_DecryptorBase::MaxPlaintextLength"></a><p>
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          <td class="md" nowrap valign="top"> virtual unsigned int PK_CryptoSystem::MaxPlaintextLength </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">unsigned int&nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>cipherTextLength</em>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap> const<code> [pure virtual, inherited]</code></td>
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maximum length of plaintext for a given ciphertext length 
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<dl compact><dt><b>Note:</b></dt><dd>This function returns 0 if cipherTextLength is not valid (too long or too short). </dd></dl>

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Implemented in <a class="el" href="class_p_k___fixed_length_crypto_system.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">PK_FixedLengthCryptoSystem</a>.    </td>
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<a name="_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" doxytag="TF_DecryptorBase::MaxPlaintextLength"></a><p>
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          <td class="md" nowrap valign="top"> unsigned int PK_FixedLengthCryptoSystem::MaxPlaintextLength </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">unsigned int&nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>cipherTextLength</em>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap> const<code> [virtual, inherited]</code></td>
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maximum length of plaintext for a given ciphertext length 
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<dl compact><dt><b>Note:</b></dt><dd>This function returns 0 if cipherTextLength is not valid (too long or too short). </dd></dl>

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Implements <a class="el" href="class_p_k___crypto_system.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">PK_CryptoSystem</a>.
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Definition at line <a class="el" href="cryptlib_8cpp-source.html#l00595">595</a> of file <a class="el" href="cryptlib_8cpp-source.html">cryptlib.cpp</a>.    </td>
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<a name="_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" doxytag="TF_DecryptorBase::CiphertextLength"></a><p>
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          <td class="md" nowrap valign="top"> virtual unsigned int PK_CryptoSystem::CiphertextLength </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">unsigned int&nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>plainTextLength</em>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap> const<code> [pure virtual, inherited]</code></td>
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calculate length of ciphertext given length of plaintext 
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<dl compact><dt><b>Note:</b></dt><dd>This function returns 0 if plainTextLength is not valid (too long). </dd></dl>

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Implemented in <a class="el" href="class_p_k___fixed_length_crypto_system.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">PK_FixedLengthCryptoSystem</a>.    </td>
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<a name="_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" doxytag="TF_DecryptorBase::CiphertextLength"></a><p>
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          <td class="md" nowrap valign="top"> unsigned int PK_FixedLengthCryptoSystem::CiphertextLength </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">unsigned int&nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>plainTextLength</em>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap> const<code> [virtual, inherited]</code></td>
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calculate length of ciphertext given length of plaintext 
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<dl compact><dt><b>Note:</b></dt><dd>This function returns 0 if plainTextLength is not valid (too long). </dd></dl>

<p>
Implements <a class="el" href="class_p_k___crypto_system.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">PK_CryptoSystem</a>.
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Definition at line <a class="el" href="cryptlib_8cpp-source.html#l00603">603</a> of file <a class="el" href="cryptlib_8cpp-source.html">cryptlib.cpp</a>.    </td>
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<hr>The documentation for this class was generated from the following files:<ul>
<li><a class="el" href="pubkey_8h-source.html">pubkey.h</a><li><a class="el" href="pubkey_8cpp-source.html">pubkey.cpp</a></ul>
<hr size="1"><address style="align: right;"><small>Generated on Tue Jul 8 23:35:41 2003 for Crypto++ by
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</a>1.3.2 </small></address>
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