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著名的密码库Crypto++的文档 C++语言的杰作。程序员必备。

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          <td width="100%"> const<code> [pure virtual]</code></td>
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maximum length of plaintext for a given ciphertext length 
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<dl class="note" 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_impl.html#a458766069b12b977e7483ab8dfbcba9">PK_FixedLengthCryptoSystemImpl&lt; PK_Encryptor &gt;</a>, <a class="el" href="class_p_k___fixed_length_crypto_system_impl.html#a458766069b12b977e7483ab8dfbcba9">PK_FixedLengthCryptoSystemImpl&lt; PK_Decryptor &gt;</a>, <a class="el" href="class_d_l___crypto_system_base.html#3deffe3347f225eb0483c7bf3bedc495">DL_CryptoSystemBase&lt; PK_Decryptor, DL_PrivateKey&lt; SCHEME_OPTIONS::Element &gt; &gt;</a>, <a class="el" href="class_d_l___crypto_system_base.html#3deffe3347f225eb0483c7bf3bedc495">DL_CryptoSystemBase&lt; PK_Decryptor, DL_PrivateKey&lt; T &gt; &gt;</a>, <a class="el" href="class_d_l___crypto_system_base.html#3deffe3347f225eb0483c7bf3bedc495">DL_CryptoSystemBase&lt; PK_Encryptor, DL_PublicKey&lt; SCHEME_OPTIONS::Element &gt; &gt;</a>, and <a class="el" href="class_d_l___crypto_system_base.html#3deffe3347f225eb0483c7bf3bedc495">DL_CryptoSystemBase&lt; PK_Encryptor, DL_PublicKey&lt; T &gt; &gt;</a>.
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<a class="anchor" name="bf04a4e08fb69a1a118bad3e998ef6a6"></a><!-- doxytag: member="PK_CryptoSystem::CiphertextLength" ref="bf04a4e08fb69a1a118bad3e998ef6a6" args="(size_t plaintextLength) const =0" -->
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          <td class="memname">virtual size_t PK_CryptoSystem::CiphertextLength           </td>
          <td>(</td>
          <td class="paramtype">size_t&nbsp;</td>
          <td class="paramname"> <em>plaintextLength</em>          </td>
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calculate length of ciphertext given length of plaintext 
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<dl class="note" 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_impl.html#4bdffbbeb046825f357331cbeb42956e">PK_FixedLengthCryptoSystemImpl&lt; PK_Encryptor &gt;</a>, <a class="el" href="class_p_k___fixed_length_crypto_system_impl.html#4bdffbbeb046825f357331cbeb42956e">PK_FixedLengthCryptoSystemImpl&lt; PK_Decryptor &gt;</a>, <a class="el" href="class_d_l___crypto_system_base.html#c738aee0b0262899ad33379da8798c6a">DL_CryptoSystemBase&lt; PK_Decryptor, DL_PrivateKey&lt; SCHEME_OPTIONS::Element &gt; &gt;</a>, <a class="el" href="class_d_l___crypto_system_base.html#c738aee0b0262899ad33379da8798c6a">DL_CryptoSystemBase&lt; PK_Decryptor, DL_PrivateKey&lt; T &gt; &gt;</a>, <a class="el" href="class_d_l___crypto_system_base.html#c738aee0b0262899ad33379da8798c6a">DL_CryptoSystemBase&lt; PK_Encryptor, DL_PublicKey&lt; SCHEME_OPTIONS::Element &gt; &gt;</a>, and <a class="el" href="class_d_l___crypto_system_base.html#c738aee0b0262899ad33379da8798c6a">DL_CryptoSystemBase&lt; PK_Encryptor, DL_PublicKey&lt; T &gt; &gt;</a>.
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<a class="anchor" name="294c4664af51a72112db1f04e6ef9049"></a><!-- doxytag: member="PK_CryptoSystem::ParameterSupported" ref="294c4664af51a72112db1f04e6ef9049" args="(const char *name) const =0" -->
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          <td class="memname">virtual bool PK_CryptoSystem::ParameterSupported           </td>
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          <td class="paramname"> <em>name</em>          </td>
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this object supports the use of the parameter with the given name 
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some possible parameter names: EncodingParameters, KeyDerivationParameters 
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Implemented in <a class="el" href="class_t_f___crypto_system_base.html#7e3d9b64229a0eeb41208425898c3be4">TF_CryptoSystemBase&lt; PK_Decryptor, TF_Base&lt; TrapdoorFunctionInverse, PK_EncryptionMessageEncodingMethod &gt; &gt;</a>, <a class="el" href="class_t_f___crypto_system_base.html#7e3d9b64229a0eeb41208425898c3be4">TF_CryptoSystemBase&lt; PK_Encryptor, TF_Base&lt; RandomizedTrapdoorFunction, PK_EncryptionMessageEncodingMethod &gt; &gt;</a>, <a class="el" href="class_d_l___crypto_system_base.html#c510f55af473e85547237fdb39e441e1">DL_CryptoSystemBase&lt; PK_Decryptor, DL_PrivateKey&lt; SCHEME_OPTIONS::Element &gt; &gt;</a>, <a class="el" href="class_d_l___crypto_system_base.html#c510f55af473e85547237fdb39e441e1">DL_CryptoSystemBase&lt; PK_Decryptor, DL_PrivateKey&lt; T &gt; &gt;</a>, <a class="el" href="class_d_l___crypto_system_base.html#c510f55af473e85547237fdb39e441e1">DL_CryptoSystemBase&lt; PK_Encryptor, DL_PublicKey&lt; SCHEME_OPTIONS::Element &gt; &gt;</a>, and <a class="el" href="class_d_l___crypto_system_base.html#c510f55af473e85547237fdb39e441e1">DL_CryptoSystemBase&lt; PK_Encryptor, DL_PublicKey&lt; T &gt; &gt;</a>.
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<a class="anchor" name="f415eacc974d297a03c4e7de710e5b4e"></a><!-- doxytag: member="PK_CryptoSystem::FixedCiphertextLength" ref="f415eacc974d297a03c4e7de710e5b4e" args="() const" -->
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          <td class="memname">virtual size_t PK_CryptoSystem::FixedCiphertextLength           </td>
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          <td class="paramname">          </td>
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return fixed ciphertext length, if one exists, otherwise return 0 
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<dl class="note" compact><dt><b>Note:</b></dt><dd>"Fixed" here means length of ciphertext does not depend on length of plaintext. It usually does depend on the key length. </dd></dl>

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Reimplemented in <a class="el" href="class_t_f___crypto_system_base.html#91638e029e369d985f7858ad7daf2019">TF_CryptoSystemBase&lt; PK_Decryptor, TF_Base&lt; TrapdoorFunctionInverse, PK_EncryptionMessageEncodingMethod &gt; &gt;</a>, and <a class="el" href="class_t_f___crypto_system_base.html#91638e029e369d985f7858ad7daf2019">TF_CryptoSystemBase&lt; PK_Encryptor, TF_Base&lt; RandomizedTrapdoorFunction, PK_EncryptionMessageEncodingMethod &gt; &gt;</a>.
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Definition at line <a class="el" href="cryptlib_8h-source.html#l01165">1165</a> of file <a class="el" href="cryptlib_8h-source.html">cryptlib.h</a>.
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Referenced by <a class="el" href="cryptlib_8h-source.html#l01223">PK_Decryptor::FixedLengthDecrypt()</a>.
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<hr>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="cryptlib_8h-source.html">cryptlib.h</a></ul>
<hr size="1"><address style="text-align: right;"><small>Generated on Fri Jun 1 11:11:44 2007 for Crypto++ by&nbsp;
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