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<div class="title">pairing<div class="ingroups"><a class="el" href="group___epid_module.html">epid&nbsp;</a> » <a class="el" href="group___epid_common.html">common</a> » <a class="el" href="group___epid_math.html">math</a></div></div> </div>
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<p>Pairing operations.
<a href="#details">More...</a></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="groups"></a>
Modules</h2></td></tr>
<tr class="memitem:group___epid11_pairing_primitives"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="group___epid11_pairing_primitives.html">Intel(R) EPID 1.1 specific pairing</a></td></tr>
<tr class="memdesc:group___epid11_pairing_primitives"><td class="mdescLeft"> </td><td class="mdescRight">Intel(R) EPID 1.1 pairing operations. <br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:ga29f79a645871830754d396b9b4a2a0cc"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group___error_codes.html#gafdb27c77c2c4b32c807e326a8a0da360">EpidStatus</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group___pairing_primitives.html#ga29f79a645871830754d396b9b4a2a0cc">NewPairingState</a> (<a class="el" href="group___ec_group_primitives.html#gac91c5a7623c17a868dd15b2e9aaf7159">EcGroup</a> const *ga, <a class="el" href="group___ec_group_primitives.html#gac91c5a7623c17a868dd15b2e9aaf7159">EcGroup</a> const *gb, <a class="el" href="group___finite_field_primitives.html#gab281b24e336a8b3d7d90079d862d969e">FiniteField</a> *ff, <a class="el" href="struct_big_num_str.html">BigNumStr</a> const *t, <a class="el" href="stdtypes_8h.html#ad5c9d4ba3dc37783a528b0925dc981a0">bool</a> neg, <a class="el" href="struct_pairing_state.html">PairingState</a> **ps)</td></tr>
<tr class="memdesc:ga29f79a645871830754d396b9b4a2a0cc"><td class="mdescLeft"> </td><td class="mdescRight">Constructs a new pairing state. <a href="#ga29f79a645871830754d396b9b4a2a0cc">More...</a><br /></td></tr>
<tr class="separator:ga29f79a645871830754d396b9b4a2a0cc"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gad54aebdc331d39b73000fdca9e04f94d"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group___pairing_primitives.html#gad54aebdc331d39b73000fdca9e04f94d">DeletePairingState</a> (<a class="el" href="struct_pairing_state.html">PairingState</a> **ps)</td></tr>
<tr class="memdesc:gad54aebdc331d39b73000fdca9e04f94d"><td class="mdescLeft"> </td><td class="mdescRight">Frees a previously allocated by <a class="el" href="struct_pairing_state.html" title="A scratch buffer for stateful pairing calls. ">PairingState</a>. <a href="#gad54aebdc331d39b73000fdca9e04f94d">More...</a><br /></td></tr>
<tr class="separator:gad54aebdc331d39b73000fdca9e04f94d"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga58a9d3cb6129274a04c72a35a52f768d"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group___error_codes.html#gafdb27c77c2c4b32c807e326a8a0da360">EpidStatus</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group___pairing_primitives.html#ga58a9d3cb6129274a04c72a35a52f768d">Pairing</a> (<a class="el" href="struct_pairing_state.html">PairingState</a> *ps, <a class="el" href="group___ec_group_primitives.html#ga85c1d5e106031b385a6e23e598ac98fa">EcPoint</a> const *a, <a class="el" href="group___ec_group_primitives.html#ga85c1d5e106031b385a6e23e598ac98fa">EcPoint</a> const *b, <a class="el" href="group___finite_field_primitives.html#ga6cff5c7c06b07a87442b810ccc0a86fa">FfElement</a> *d)</td></tr>
<tr class="memdesc:ga58a9d3cb6129274a04c72a35a52f768d"><td class="mdescLeft"> </td><td class="mdescRight">Computes an Optimal Ate Pairing for two parameters. <a href="#ga58a9d3cb6129274a04c72a35a52f768d">More...</a><br /></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<p>Pairing operations. </p>
<p>Provides APIs for defining and using a pairing relationship between two elliptic curve groups. </p>
<h2 class="groupheader">Function Documentation</h2>
<a id="gad54aebdc331d39b73000fdca9e04f94d"></a>
<h2 class="memtitle"><span class="permalink"><a href="#gad54aebdc331d39b73000fdca9e04f94d">◆ </a></span>DeletePairingState()</h2>
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<td class="memname">void DeletePairingState </td>
<td>(</td>
<td class="paramtype"><a class="el" href="struct_pairing_state.html">PairingState</a> ** </td>
<td class="paramname"><em>ps</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Frees a previously allocated by <a class="el" href="struct_pairing_state.html" title="A scratch buffer for stateful pairing calls. ">PairingState</a>. </p>
<p>Frees memory pointed to by pairing state. Nulls the pointer.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">ps</td><td>The pairing state. Can be NULL.</td></tr>
</table>
</dd>
</dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="group___pairing_primitives.html#ga29f79a645871830754d396b9b4a2a0cc" title="Constructs a new pairing state. ">NewPairingState</a> </dd></dl>
</div>
</div>
<a id="ga29f79a645871830754d396b9b4a2a0cc"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga29f79a645871830754d396b9b4a2a0cc">◆ </a></span>NewPairingState()</h2>
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<td class="memname"><a class="el" href="group___error_codes.html#gafdb27c77c2c4b32c807e326a8a0da360">EpidStatus</a> NewPairingState </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___ec_group_primitives.html#gac91c5a7623c17a868dd15b2e9aaf7159">EcGroup</a> const * </td>
<td class="paramname"><em>ga</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___ec_group_primitives.html#gac91c5a7623c17a868dd15b2e9aaf7159">EcGroup</a> const * </td>
<td class="paramname"><em>gb</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___finite_field_primitives.html#gab281b24e336a8b3d7d90079d862d969e">FiniteField</a> * </td>
<td class="paramname"><em>ff</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="struct_big_num_str.html">BigNumStr</a> const * </td>
<td class="paramname"><em>t</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="stdtypes_8h.html#ad5c9d4ba3dc37783a528b0925dc981a0">bool</a> </td>
<td class="paramname"><em>neg</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="struct_pairing_state.html">PairingState</a> ** </td>
<td class="paramname"><em>ps</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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<p>Constructs a new pairing state. </p>
<p>Allocates memory and creates a new pairing state for Optimal Ate Pairing.</p>
<p>Use <a class="el" href="group___pairing_primitives.html#gad54aebdc331d39b73000fdca9e04f94d" title="Frees a previously allocated by PairingState. ">DeletePairingState()</a> to free memory.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">ga</td><td>The EcGroup from which the first parameter of the pairing is taken. </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">gb</td><td>The EcGroup from which the second parameter of the pairing is taken. </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">ff</td><td>The result finite field. Must be a Fq12 field. </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">t</td><td>A positive integer such that 6(t^2) == q - p, where p and q are parameters of G1. </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">neg</td><td>Select the alternate "negate" processing path for Optimal Ate Pairing. </td></tr>
<tr><td class="paramdir">[out]</td><td class="paramname">ps</td><td>Newly constructed pairing state.</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd><a class="el" href="group___error_codes.html#gafdb27c77c2c4b32c807e326a8a0da360" title="Return status for SDK functions. ">EpidStatus</a></dd></dl>
<dl class="section attention"><dt>Attention</dt><dd>It is the responsibility of the caller to ensure that ga, gb, and ff exist for the entire lifetime of the new <a class="el" href="struct_pairing_state.html" title="A scratch buffer for stateful pairing calls. ">PairingState</a>.</dd></dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="group___pairing_primitives.html#gad54aebdc331d39b73000fdca9e04f94d" title="Frees a previously allocated by PairingState. ">DeletePairingState</a> </dd></dl>
</div>
</div>
<a id="ga58a9d3cb6129274a04c72a35a52f768d"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga58a9d3cb6129274a04c72a35a52f768d">◆ </a></span>Pairing()</h2>
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<td class="memname"><a class="el" href="group___error_codes.html#gafdb27c77c2c4b32c807e326a8a0da360">EpidStatus</a> Pairing </td>
<td>(</td>
<td class="paramtype"><a class="el" href="struct_pairing_state.html">PairingState</a> * </td>
<td class="paramname"><em>ps</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___ec_group_primitives.html#ga85c1d5e106031b385a6e23e598ac98fa">EcPoint</a> const * </td>
<td class="paramname"><em>a</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___ec_group_primitives.html#ga85c1d5e106031b385a6e23e598ac98fa">EcPoint</a> const * </td>
<td class="paramname"><em>b</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___finite_field_primitives.html#ga6cff5c7c06b07a87442b810ccc0a86fa">FfElement</a> * </td>
<td class="paramname"><em>d</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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<p>Computes an Optimal Ate Pairing for two parameters. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">ps</td><td>The pairing state. </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">a</td><td>The first value to pair. Must be in ga used to create ps. </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">b</td><td>The second value to pair. Must be in gb used to create ps </td></tr>
<tr><td class="paramdir">[out]</td><td class="paramname">d</td><td>The result of the pairing. Will be in ff used to create the pairing state.</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd><a class="el" href="group___error_codes.html#gafdb27c77c2c4b32c807e326a8a0da360" title="Return status for SDK functions. ">EpidStatus</a> </dd></dl>
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