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<title>Crypto++: EcPrecomputation< ECP > Class Template Reference</title>
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<div id="projectname">Crypto++
 <span id="projectnumber">7.0</span>
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<div id="projectbrief">Free C++ class library of cryptographic schemes</div>
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<div class="title">EcPrecomputation< ECP > Class Template Reference</div> </div>
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<p><a class="el" href="class_e_c_p.html" title="Elliptic Curve over GF(p), where p is prime. ">ECP</a> precomputation specialization.
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<img id="dynsection-0-trigger" src="closed.png" alt="+"/> Inheritance diagram for EcPrecomputation< ECP >:</div>
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Public Types</h2></td></tr>
<tr class="memitem:a9d3922397513fa11f1d4073d28744f54"><td class="memItemLeft" align="right" valign="top"><a id="a9d3922397513fa11f1d4073d28744f54"></a>
typedef <a class="el" href="class_e_c_p.html">ECP</a> </td><td class="memItemRight" valign="bottom"><b>EllipticCurve</b></td></tr>
<tr class="separator:a9d3922397513fa11f1d4073d28744f54"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="inherit_header pub_types_class_d_l___group_precomputation"><td colspan="2" onclick="javascript:toggleInherit('pub_types_class_d_l___group_precomputation')"><img src="closed.png" alt="-"/> Public Types inherited from <a class="el" href="class_d_l___group_precomputation.html">DL_GroupPrecomputation< ECP::Point ></a></td></tr>
<tr class="memitem:ae54cf09e58043cb37253a0ede3a1a435 inherit pub_types_class_d_l___group_precomputation"><td class="memItemLeft" align="right" valign="top"><a id="ae54cf09e58043cb37253a0ede3a1a435"></a>
typedef <a class="el" href="struct_e_c_p_point.html">ECP::Point</a> </td><td class="memItemRight" valign="bottom"><b>Element</b></td></tr>
<tr class="separator:ae54cf09e58043cb37253a0ede3a1a435 inherit pub_types_class_d_l___group_precomputation"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:aaa3c36266f631554e46119da76be1f5e"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="class_ec_precomputation_3_01_e_c_p_01_4.html#aaa3c36266f631554e46119da76be1f5e">NeedConversions</a> () const</td></tr>
<tr class="memdesc:aaa3c36266f631554e46119da76be1f5e"><td class="mdescLeft"> </td><td class="mdescRight">Determines if elements needs conversion. <a href="#aaa3c36266f631554e46119da76be1f5e">More...</a><br /></td></tr>
<tr class="separator:aaa3c36266f631554e46119da76be1f5e"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a72e3e4612db7c4351f3653a66ccf15a4"><td class="memItemLeft" align="right" valign="top"><a class="el" href="struct_e_c_p_point.html">Element</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_ec_precomputation_3_01_e_c_p_01_4.html#a72e3e4612db7c4351f3653a66ccf15a4">ConvertIn</a> (const <a class="el" href="struct_e_c_p_point.html">Element</a> &P) const</td></tr>
<tr class="memdesc:a72e3e4612db7c4351f3653a66ccf15a4"><td class="mdescLeft"> </td><td class="mdescRight">Converts an element between representations. <a href="#a72e3e4612db7c4351f3653a66ccf15a4">More...</a><br /></td></tr>
<tr class="separator:a72e3e4612db7c4351f3653a66ccf15a4"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a6500e1cc79cbc01ccc283695a5a334de"><td class="memItemLeft" align="right" valign="top"><a class="el" href="struct_e_c_p_point.html">Element</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_ec_precomputation_3_01_e_c_p_01_4.html#a6500e1cc79cbc01ccc283695a5a334de">ConvertOut</a> (const <a class="el" href="struct_e_c_p_point.html">Element</a> &P) const</td></tr>
<tr class="memdesc:a6500e1cc79cbc01ccc283695a5a334de"><td class="mdescLeft"> </td><td class="mdescRight">Converts an element between representations. <a href="#a6500e1cc79cbc01ccc283695a5a334de">More...</a><br /></td></tr>
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<tr class="memitem:a439d3669a926c82cc7623d611cec778f"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="class_abstract_group.html">AbstractGroup</a>< <a class="el" href="struct_e_c_p_point.html">Element</a> > & </td><td class="memItemRight" valign="bottom"><a class="el" href="class_ec_precomputation_3_01_e_c_p_01_4.html#a439d3669a926c82cc7623d611cec778f">GetGroup</a> () const</td></tr>
<tr class="memdesc:a439d3669a926c82cc7623d611cec778f"><td class="mdescLeft"> </td><td class="mdescRight">Retrieves <a class="el" href="class_abstract_group.html" title="Abstract group. ">AbstractGroup</a> interface. <a href="#a439d3669a926c82cc7623d611cec778f">More...</a><br /></td></tr>
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<tr class="memitem:a8f736454a36635ee27d3eb87acaebab2"><td class="memItemLeft" align="right" valign="top"><a class="el" href="struct_e_c_p_point.html">Element</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_ec_precomputation_3_01_e_c_p_01_4.html#a8f736454a36635ee27d3eb87acaebab2">BERDecodeElement</a> (<a class="el" href="class_buffered_transformation.html">BufferedTransformation</a> &bt) const</td></tr>
<tr class="memdesc:a8f736454a36635ee27d3eb87acaebab2"><td class="mdescLeft"> </td><td class="mdescRight">Decodes element in DER format. <a href="#a8f736454a36635ee27d3eb87acaebab2">More...</a><br /></td></tr>
<tr class="separator:a8f736454a36635ee27d3eb87acaebab2"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a160009da005dd686fd32cef31093e67f"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_ec_precomputation_3_01_e_c_p_01_4.html#a160009da005dd686fd32cef31093e67f">DEREncodeElement</a> (<a class="el" href="class_buffered_transformation.html">BufferedTransformation</a> &bt, const <a class="el" href="struct_e_c_p_point.html">Element</a> &v) const</td></tr>
<tr class="memdesc:a160009da005dd686fd32cef31093e67f"><td class="mdescLeft"> </td><td class="mdescRight">Encodes element in DER format. <a href="#a160009da005dd686fd32cef31093e67f">More...</a><br /></td></tr>
<tr class="separator:a160009da005dd686fd32cef31093e67f"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a900bdf40eea4c90ebd4fbf52f53d3b6a"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_ec_precomputation_3_01_e_c_p_01_4.html#a900bdf40eea4c90ebd4fbf52f53d3b6a">SetCurve</a> (const <a class="el" href="class_e_c_p.html">ECP</a> &ec)</td></tr>
<tr class="memdesc:a900bdf40eea4c90ebd4fbf52f53d3b6a"><td class="mdescLeft"> </td><td class="mdescRight">Set the elliptic curve. <a href="#a900bdf40eea4c90ebd4fbf52f53d3b6a">More...</a><br /></td></tr>
<tr class="separator:a900bdf40eea4c90ebd4fbf52f53d3b6a"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a40112ff4b5a4d190a91df2bec223adf7"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="class_e_c_p.html">ECP</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="class_ec_precomputation_3_01_e_c_p_01_4.html#a40112ff4b5a4d190a91df2bec223adf7">GetCurve</a> () const</td></tr>
<tr class="memdesc:a40112ff4b5a4d190a91df2bec223adf7"><td class="mdescLeft"> </td><td class="mdescRight">Get the elliptic curve. <a href="#a40112ff4b5a4d190a91df2bec223adf7">More...</a><br /></td></tr>
<tr class="separator:a40112ff4b5a4d190a91df2bec223adf7"><td class="memSeparator" colspan="2"> </td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><h3>template<><br />
class EcPrecomputation< ECP ></h3>
<p><a class="el" href="class_e_c_p.html" title="Elliptic Curve over GF(p), where p is prime. ">ECP</a> precomputation specialization. </p>
<p>Implementation of <code><a class="el" href="class_d_l___group_precomputation.html">DL_GroupPrecomputation<ECP::Point></a></code> with input and output conversions for Montgomery modular multiplication. </p><dl class="section see"><dt>See also</dt><dd><a class="el" href="class_d_l___group_precomputation.html" title="DL_GroupPrecomputation interface. ">DL_GroupPrecomputation</a>, <a class="el" href="class_modular_arithmetic.html" title="Ring of congruence classes modulo n. ">ModularArithmetic</a>, <a class="el" href="class_montgomery_representation.html" title="Performs modular arithmetic in Montgomery representation for increased speed. ">MontgomeryRepresentation</a> </dd></dl>
<p class="definition">Definition at line <a class="el" href="ecp_8h_source.html#l00114">114</a> of file <a class="el" href="ecp_8h_source.html">ecp.h</a>.</p>
</div><h2 class="groupheader">Member Function Documentation</h2>
<a id="aaa3c36266f631554e46119da76be1f5e"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aaa3c36266f631554e46119da76be1f5e">◆ </a></span>NeedConversions()</h2>
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<td class="memname">bool <a class="el" href="class_ec_precomputation.html">EcPrecomputation</a>< <a class="el" href="class_e_c_p.html">ECP</a> >::NeedConversions </td>
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<p>Determines if elements needs conversion. </p>
<dl class="section return"><dt>Returns</dt><dd>true if the element needs conversion, false otherwise</dd></dl>
<p>NeedConversions determines if an element must convert between representations. </p>
<p>Reimplemented from <a class="el" href="class_d_l___group_precomputation.html#af06195fe5dbbf8da4491a9b7356b1293">DL_GroupPrecomputation< ECP::Point ></a>.</p>
<p class="definition">Definition at line <a class="el" href="ecp_8h_source.html#l00122">122</a> of file <a class="el" href="ecp_8h_source.html">ecp.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a72e3e4612db7c4351f3653a66ccf15a4">◆ </a></span>ConvertIn()</h2>
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<td class="memname"><a class="el" href="struct_e_c_p_point.html">Element</a> <a class="el" href="class_ec_precomputation.html">EcPrecomputation</a>< <a class="el" href="class_e_c_p.html">ECP</a> >::ConvertIn </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="struct_e_c_p_point.html">Element</a> & </td>
<td class="paramname"><em>v</em></td><td>)</td>
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<p>Converts an element between representations. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">v</td><td>element to convert </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>an element converted to an alternate representation for internal use</dd></dl>
<p>ConvertIn is used when an element must convert between representations. </p>
<p>Reimplemented from <a class="el" href="class_d_l___group_precomputation.html#a00f3c02e34f54656758c584cdcfd4224">DL_GroupPrecomputation< ECP::Point ></a>.</p>
<p class="definition">Definition at line <a class="el" href="ecp_8h_source.html#l00123">123</a> of file <a class="el" href="ecp_8h_source.html">ecp.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a6500e1cc79cbc01ccc283695a5a334de">◆ </a></span>ConvertOut()</h2>
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<td class="memname"><a class="el" href="struct_e_c_p_point.html">Element</a> <a class="el" href="class_ec_precomputation.html">EcPrecomputation</a>< <a class="el" href="class_e_c_p.html">ECP</a> >::ConvertOut </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="struct_e_c_p_point.html">Element</a> & </td>
<td class="paramname"><em>v</em></td><td>)</td>
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<p>Converts an element between representations. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">v</td><td>element to convert </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>an element converted from an alternate representation </dd></dl>
<p>Reimplemented from <a class="el" href="class_d_l___group_precomputation.html#ab8f09285b6a3900a14facedd6925552f">DL_GroupPrecomputation< ECP::Point ></a>.</p>
<p class="definition">Definition at line <a class="el" href="ecp_8h_source.html#l00125">125</a> of file <a class="el" href="ecp_8h_source.html">ecp.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a439d3669a926c82cc7623d611cec778f">◆ </a></span>GetGroup()</h2>
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<td class="memname">const <a class="el" href="class_abstract_group.html">AbstractGroup</a><<a class="el" href="struct_e_c_p_point.html">Element</a>>& <a class="el" href="class_ec_precomputation.html">EcPrecomputation</a>< <a class="el" href="class_e_c_p.html">ECP</a> >::GetGroup </td>
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<p>Retrieves <a class="el" href="class_abstract_group.html" title="Abstract group. ">AbstractGroup</a> interface. </p>
<dl class="section return"><dt>Returns</dt><dd><a class="el" href="class_ec_precomputation_3_01_e_c_p_01_4.html#a439d3669a926c82cc7623d611cec778f" title="Retrieves AbstractGroup interface. ">GetGroup()</a> returns the <a class="el" href="class_abstract_group.html" title="Abstract group. ">AbstractGroup</a> interface </dd></dl>
<p>Implements <a class="el" href="class_d_l___group_precomputation.html#aaa3cb55f3c6e051f8e769711784d4bcd">DL_GroupPrecomputation< ECP::Point ></a>.</p>
<p class="definition">Definition at line <a class="el" href="ecp_8h_source.html#l00127">127</a> of file <a class="el" href="ecp_8h_source.html">ecp.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a8f736454a36635ee27d3eb87acaebab2">◆ </a></span>BERDecodeElement()</h2>
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<td class="memname"><a class="el" href="struct_e_c_p_point.html">Element</a> <a class="el" href="class_ec_precomputation.html">EcPrecomputation</a>< <a class="el" href="class_e_c_p.html">ECP</a> >::BERDecodeElement </td>
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<td class="paramtype"><a class="el" href="class_buffered_transformation.html">BufferedTransformation</a> & </td>
<td class="paramname"><em>bt</em></td><td>)</td>
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<p>Decodes element in DER format. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<dl class="section return"><dt>Returns</dt><dd>element in the group </dd></dl>
<p>Implements <a class="el" href="class_d_l___group_precomputation.html#a43a840afa6f0e49a60c28883380c6990">DL_GroupPrecomputation< ECP::Point ></a>.</p>
<p class="definition">Definition at line <a class="el" href="ecp_8h_source.html#l00128">128</a> of file <a class="el" href="ecp_8h_source.html">ecp.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a160009da005dd686fd32cef31093e67f">◆ </a></span>DEREncodeElement()</h2>
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<td class="memname">void <a class="el" href="class_ec_precomputation.html">EcPrecomputation</a>< <a class="el" href="class_e_c_p.html">ECP</a> >::DEREncodeElement </td>
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<p>Encodes element in DER format. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">bt</td><td><a class="el" href="class_buffered_transformation.html" title="Interface for buffered transformations. ">BufferedTransformation</a> object </td></tr>
<tr><td class="paramname">P</td><td>Element to encode </td></tr>
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</dd>
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<p>Implements <a class="el" href="class_d_l___group_precomputation.html#a6b6549c73ef485921210e88325e9dca1">DL_GroupPrecomputation< ECP::Point ></a>.</p>
<p class="definition">Definition at line <a class="el" href="ecp_8h_source.html#l00129">129</a> of file <a class="el" href="ecp_8h_source.html">ecp.h</a>.</p>
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<a id="a900bdf40eea4c90ebd4fbf52f53d3b6a"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a900bdf40eea4c90ebd4fbf52f53d3b6a">◆ </a></span>SetCurve()</h2>
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<td class="memname">void <a class="el" href="class_ec_precomputation.html">EcPrecomputation</a>< <a class="el" href="class_e_c_p.html">ECP</a> >::SetCurve </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="class_e_c_p.html">ECP</a> & </td>
<td class="paramname"><em>ec</em></td><td>)</td>
<td></td>
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<span class="mlabels"><span class="mlabel">inline</span></span> </td>
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<p>Set the elliptic curve. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ec</td><td><a class="el" href="class_e_c_p.html" title="Elliptic Curve over GF(p), where p is prime. ">ECP</a> derived class</td></tr>
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</dd>
</dl>
<p><a class="el" href="class_ec_precomputation_3_01_e_c_p_01_4.html#a900bdf40eea4c90ebd4fbf52f53d3b6a" title="Set the elliptic curve. ">SetCurve()</a> is not inherited </p>
<p class="definition">Definition at line <a class="el" href="ecp_8h_source.html#l00134">134</a> of file <a class="el" href="ecp_8h_source.html">ecp.h</a>.</p>
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<a id="a40112ff4b5a4d190a91df2bec223adf7"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a40112ff4b5a4d190a91df2bec223adf7">◆ </a></span>GetCurve()</h2>
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<td class="memname">const <a class="el" href="class_e_c_p.html">ECP</a>& <a class="el" href="class_ec_precomputation.html">EcPrecomputation</a>< <a class="el" href="class_e_c_p.html">ECP</a> >::GetCurve </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td> const</td>
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<td class="mlabels-right">
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<p>Get the elliptic curve. </p>
<dl class="section return"><dt>Returns</dt><dd><a class="el" href="class_e_c_p.html" title="Elliptic Curve over GF(p), where p is prime. ">ECP</a> curve</dd></dl>
<p><a class="el" href="class_ec_precomputation_3_01_e_c_p_01_4.html#a40112ff4b5a4d190a91df2bec223adf7" title="Get the elliptic curve. ">GetCurve()</a> is not inherited </p>
<p class="definition">Definition at line <a class="el" href="ecp_8h_source.html#l00143">143</a> of file <a class="el" href="ecp_8h_source.html">ecp.h</a>.</p>
</div>
</div>
<hr/>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="ecp_8h_source.html">ecp.h</a></li>
</ul>
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