class_p_k___encryptor.html

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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<dl class="pre" compact><dt><b>Precondition:</b></dt><dd>CiphertextLength(plaintextLength) != 0 (i.e., plaintext isn't too long) <p>
size of ciphertext == CiphertextLength(plaintextLength) </dd></dl>

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Implemented in <a class="el" href="class_t_f___encryptor_base.html#fa1feef1aeea65276bba4788f5d7b0b4">TF_EncryptorBase</a>, <a class="el" href="class_d_l___encryptor_base.html#c16e4aa7be7b424de8e9816810b210c7">DL_EncryptorBase&lt; T &gt;</a>, and <a class="el" href="class_d_l___encryptor_base.html#c16e4aa7be7b424de8e9816810b210c7">DL_EncryptorBase&lt; SCHEME_OPTIONS::Element &gt;</a>.
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<a class="anchor" name="558cc0f957c7e1e448a746033549964d"></a><!-- doxytag: member="PK_Encryptor::CreateEncryptionFilter" ref="558cc0f957c7e1e448a746033549964d" args="(RandomNumberGenerator &amp;rng, BufferedTransformation *attachment=NULL, const NameValuePairs &amp;parameters=g_nullNameValuePairs) const" -->
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          <td class="memname"><a class="el" href="class_buffered_transformation.html">BufferedTransformation</a> * PK_Encryptor::CreateEncryptionFilter           </td>
          <td>(</td>
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          <td class="paramname"> <em>rng</em>, </td>
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          <td class="paramkey"></td>
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          <td class="paramtype">const <a class="el" href="class_name_value_pairs.html">NameValuePairs</a> &amp;&nbsp;</td>
          <td class="paramname"> <em>parameters</em> = <code><a class="el" href="cryptlib_8h.html#d3205973dd1afa14090a683154c1109c">g_nullNameValuePairs</a></code></td><td>&nbsp;</td>
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          <td>)</td>
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create a new encryption filter 
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<dl class="note" compact><dt><b>Note:</b></dt><dd>The caller is responsible for deleting the returned pointer. <p>
Encoding parameters should be passed in the "EP" channel. </dd></dl>

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Definition at line <a class="el" href="cryptlib_8cpp-source.html#l00596">596</a> of file <a class="el" href="cryptlib_8cpp-source.html">cryptlib.cpp</a>.
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<a class="anchor" name="a4a3552c933a36b3aea26f31d00bee9b"></a><!-- doxytag: member="PK_Encryptor::MaxPlaintextLength" ref="a4a3552c933a36b3aea26f31d00bee9b" args="(size_t ciphertextLength) const =0" -->
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          <td class="memname">virtual size_t PK_CryptoSystem::MaxPlaintextLength           </td>
          <td>(</td>
          <td class="paramtype">size_t&nbsp;</td>
          <td class="paramname"> <em>ciphertextLength</em>          </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_Encryptor::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>
          <td>&nbsp;)&nbsp;</td>
          <td width="100%"> const<code> [pure virtual, inherited]</code></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_Encryptor::ParameterSupported" ref="294c4664af51a72112db1f04e6ef9049" args="(const char *name) const =0" -->
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          <td class="memname">virtual bool PK_CryptoSystem::ParameterSupported           </td>
          <td>(</td>
          <td class="paramtype">const char *&nbsp;</td>
          <td class="paramname"> <em>name</em>          </td>
          <td>&nbsp;)&nbsp;</td>
          <td width="100%"> const<code> [pure virtual, inherited]</code></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_Encryptor::FixedCiphertextLength" ref="f415eacc974d297a03c4e7de710e5b4e" args="() const" -->
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          <td class="memname">virtual size_t PK_CryptoSystem::FixedCiphertextLength           </td>
          <td>(</td>
          <td class="paramname">          </td>
          <td>&nbsp;)&nbsp;</td>
          <td width="100%"> const<code> [inline, virtual, inherited]</code></td>
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<p>
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>

<p>
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 files:<ul>
<li><a class="el" href="cryptlib_8h-source.html">cryptlib.h</a><li><a class="el" href="cryptlib_8cpp-source.html">cryptlib.cpp</a></ul>
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