class_d_l___decryptor_impl.html

著名的密码库Crypto++的文档 C++语言的杰作。程序员必备。

<tr><td colspan="2"><br><h2>Protected Types</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="fd4bfa675133a35fe8e2f5b43d0d58cf"></a><!-- doxytag: member="DL_DecryptorImpl::KeyInterface" ref="fd4bfa675133a35fe8e2f5b43d0d58cf" args="" -->
typedef <a class="el" href="class_d_l___private_key.html">DL_PrivateKey</a>&lt; SCHEME_OPTIONS::Element &gt;&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_d_l___base.html#fd4bfa675133a35fe8e2f5b43d0d58cf">KeyInterface</a></td></tr>

<tr><td colspan="2"><br><h2>Protected Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="cf9573963d02c1841b984c6ee637ae43"></a><!-- doxytag: member="DL_DecryptorImpl::GetSignatureAlgorithm" ref="cf9573963d02c1841b984c6ee637ae43" args="() const" -->
const <a class="el" href="class_d_l___elgamal_like_signature_algorithm.html">DL_ElgamalLikeSignatureAlgorithm</a>&lt;<br>
 <a class="el" href="class_d_l___object_impl.html#79f28a05b245841b7295d4c119700892">Element</a> &gt; &amp;&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_d_l___object_impl.html#cf9573963d02c1841b984c6ee637ae43">GetSignatureAlgorithm</a> () const</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="d71f7483f1514f00962df889df9e8361"></a><!-- doxytag: member="DL_DecryptorImpl::GetKeyAgreementAlgorithm" ref="d71f7483f1514f00962df889df9e8361" args="() const" -->
const <a class="el" href="class_d_l___key_agreement_algorithm.html">DL_KeyAgreementAlgorithm</a>&lt;<br>
 <a class="el" href="class_d_l___object_impl.html#79f28a05b245841b7295d4c119700892">Element</a> &gt; &amp;&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_d_l___object_impl.html#d71f7483f1514f00962df889df9e8361">GetKeyAgreementAlgorithm</a> () const</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a78bba5169afc0258b500c6b15a56b4e"></a><!-- doxytag: member="DL_DecryptorImpl::GetKeyDerivationAlgorithm" ref="a78bba5169afc0258b500c6b15a56b4e" args="() const" -->
const <a class="el" href="class_d_l___key_derivation_algorithm.html">DL_KeyDerivationAlgorithm</a>&lt;<br>
 <a class="el" href="class_d_l___object_impl.html#79f28a05b245841b7295d4c119700892">Element</a> &gt; &amp;&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_d_l___object_impl.html#a78bba5169afc0258b500c6b15a56b4e">GetKeyDerivationAlgorithm</a> () const</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="bd8005edc2dc366f87a696c76381004c"></a><!-- doxytag: member="DL_DecryptorImpl::GetSymmetricEncryptionAlgorithm" ref="bd8005edc2dc366f87a696c76381004c" args="() const" -->
const <a class="el" href="class_d_l___symmetric_encryption_algorithm.html">DL_SymmetricEncryptionAlgorithm</a> &amp;&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_d_l___object_impl.html#bd8005edc2dc366f87a696c76381004c">GetSymmetricEncryptionAlgorithm</a> () const</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="dede5a769f5f4d890c372c0445b2448e"></a><!-- doxytag: member="DL_DecryptorImpl::GetHashIdentifier" ref="dede5a769f5f4d890c372c0445b2448e" args="() const" -->
<a class="el" href="pubkey_8h.html#ef874ed3f2d212ac4629255c8ef86dd0">HashIdentifier</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_d_l___object_impl.html#dede5a769f5f4d890c372c0445b2448e">GetHashIdentifier</a> () const</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="788a3b1b7b26840ad07316fe813c7ddf"></a><!-- doxytag: member="DL_DecryptorImpl::GetMessageEncodingInterface" ref="788a3b1b7b26840ad07316fe813c7ddf" args="() const" -->
const <a class="el" href="class_p_k___signature_message_encoding_method.html">PK_SignatureMessageEncodingMethod</a> &amp;&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_d_l___object_impl.html#788a3b1b7b26840ad07316fe813c7ddf">GetMessageEncodingInterface</a> () const</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="f4e61281fd0ea2b6097915d330566c00"></a><!-- doxytag: member="DL_DecryptorImpl::AccessKeyInterface" ref="f4e61281fd0ea2b6097915d330566c00" args="()" -->
<a class="el" href="class_d_l___decryptor_base.html">DL_DecryptorBase</a>&lt; SCHEME_OPTIONS::Element <br>
&gt;::<a class="el" href="class_d_l___private_key.html">KeyInterface</a> &amp;&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_d_l___object_impl_base.html#f4e61281fd0ea2b6097915d330566c00">AccessKeyInterface</a> ()</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="05acd52d93b09663f466dae585e42758"></a><!-- doxytag: member="DL_DecryptorImpl::GetKeyInterface" ref="05acd52d93b09663f466dae585e42758" args="() const" -->
const <a class="el" href="class_d_l___decryptor_base.html">DL_DecryptorBase</a>&lt; SCHEME_OPTIONS::Element <br>
&gt;::<a class="el" href="class_d_l___private_key.html">KeyInterface</a> &amp;&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_d_l___object_impl_base.html#05acd52d93b09663f466dae585e42758">GetKeyInterface</a> () const</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="2b5593ebad51116c9367500cb8b444c3"></a><!-- doxytag: member="DL_DecryptorImpl::GetDigestSize" ref="2b5593ebad51116c9367500cb8b444c3" args="() const" -->
size_t&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_d_l___object_impl_base.html#2b5593ebad51116c9367500cb8b444c3">GetDigestSize</a> () const</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="e54e9e0c2bad2d2816c2e21c4333e000"></a><!-- doxytag: member="DL_DecryptorImpl::GetAbstractGroupParameters" ref="e54e9e0c2bad2d2816c2e21c4333e000" args="() const" -->
const <a class="el" href="class_d_l___group_parameters.html">DL_GroupParameters</a>&lt;<br>
 <a class="el" href="class_d_l___object_impl.html#79f28a05b245841b7295d4c119700892">Element</a> &gt; &amp;&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_d_l___base.html#e54e9e0c2bad2d2816c2e21c4333e000">GetAbstractGroupParameters</a> () const</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="dd23b00903bac148152df88ef051724a"></a><!-- doxytag: member="DL_DecryptorImpl::AccessAbstractGroupParameters" ref="dd23b00903bac148152df88ef051724a" args="()" -->
<a class="el" href="class_d_l___group_parameters.html">DL_GroupParameters</a>&lt; <a class="el" href="class_d_l___object_impl.html#79f28a05b245841b7295d4c119700892">Element</a> &gt; &amp;&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_d_l___base.html#dd23b00903bac148152df88ef051724a">AccessAbstractGroupParameters</a> ()</td></tr>

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<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="5a23bde8893b76023182413d24f75b74"></a><!-- doxytag: member="DL_DecryptorImpl::Decrypt" ref="5a23bde8893b76023182413d24f75b74" args="(RandomNumberGenerator &amp;rng, const byte *ciphertext, size_t ciphertextLength, byte *plaintext, const NameValuePairs &amp;parameters=g_nullNameValuePairs) const " -->
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          <td class="memname"><a class="el" href="struct_decoding_result.html">DecodingResult</a> <a class="el" href="class_d_l___decryptor_base.html">DL_DecryptorBase</a>&lt; SCHEME_OPTIONS::Element  &gt;::Decrypt           </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="class_random_number_generator.html">RandomNumberGenerator</a> &amp;&nbsp;</td>
          <td class="paramname"> <em>rng</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">const byte *&nbsp;</td>
          <td class="paramname"> <em>ciphertext</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">size_t&nbsp;</td>
          <td class="paramname"> <em>ciphertextLength</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">byte *&nbsp;</td>
          <td class="paramname"> <em>plaintext</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <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>
          <td>)</td>
          <td></td><td></td><td width="100%"> const<code> [inline, virtual, inherited]</code></td>
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<p>
decrypt a byte string, and return the length of plaintext 
<p>
<dl class="pre" compact><dt><b>Precondition:</b></dt><dd>size of plaintext == MaxPlaintextLength(ciphertextLength) bytes. </dd></dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>the actual length of the plaintext, indication that decryption failed. </dd></dl>

<p>
Implements <a class="el" href="class_p_k___decryptor.html#b7466675ed050c440c16508f8a88cac1">PK_Decryptor</a>.
<p>
Definition at line <a class="el" href="pubkey_8h-source.html#l01184">1184</a> of file <a class="el" href="pubkey_8h-source.html">pubkey.h</a>.
<p>
References DL_KeyAgreementAlgorithm&lt; T &gt;::AgreeWithStaticPrivateKey(), DL_GroupParameters&lt; T &gt;::DecodeElement(), DL_KeyDerivationAlgorithm&lt; T &gt;::Derive(), DL_GroupParameters&lt; T &gt;::GetEncodedElementSize(), DL_SymmetricEncryptionAlgorithm::GetMaxSymmetricPlaintextLength(), DL_PrivateKey&lt; T &gt;::GetPrivateExponent(), DL_SymmetricEncryptionAlgorithm::GetSymmetricKeyLength(), <a class="el" href="secblock_8h-source.html#l00336">SecBlock&lt; T, A &gt;::size()</a>, and DL_SymmetricEncryptionAlgorithm::SymmetricDecrypt().
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<a class="anchor" name="3deffe3347f225eb0483c7bf3bedc495"></a><!-- doxytag: member="DL_DecryptorImpl::MaxPlaintextLength" ref="3deffe3347f225eb0483c7bf3bedc495" args="(size_t ciphertextLength) const " -->
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          <td class="memname">size_t <a class="el" href="class_d_l___crypto_system_base.html">DL_CryptoSystemBase</a>&lt; <a class="el" href="class_p_k___decryptor.html">PK_Decryptor</a> , <a class="el" href="class_d_l___private_key.html">DL_PrivateKey</a>&lt; SCHEME_OPTIONS::Element &gt;  &gt;::MaxPlaintextLength           </td>
          <td>(</td>
          <td class="paramtype">size_t&nbsp;</td>
          <td class="paramname"> <em>ciphertextLength</em>          </td>
          <td>&nbsp;)&nbsp;</td>
          <td width="100%"> const<code> [inline, virtual, inherited]</code></td>
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<p>

<p>
Implements <a class="el" href="class_p_k___crypto_system.html#a4a3552c933a36b3aea26f31d00bee9b">PK_CryptoSystem</a>.
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Definition at line <a class="el" href="pubkey_8h-source.html#l01156">1156</a> of file <a class="el" href="pubkey_8h-source.html">pubkey.h</a>.
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