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linux-sgx-trts-modified


			
				
					
						
						
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&#160;<span id="projectnumber">2.0.0</span>
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<p>EpidComputePreSig implementation.  
<a href="#details">More...</a></p>
<div class="textblock"><code>#include &quot;<a class="el" href="member_2context_8h.html">epid/member/context.h</a>&quot;</code><br />
</div><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="define-members"></a>
Macros</h2></td></tr>
<tr class="memitem:a5638f861b82f1746ea1af0b384ef8ff1"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="presig_8c.html#a5638f861b82f1746ea1af0b384ef8ff1">BREAK_ON_EPID_ERROR</a>(ret)</td></tr>
<tr class="memdesc:a5638f861b82f1746ea1af0b384ef8ff1"><td class="mdescLeft">&#160;</td><td class="mdescRight">Handle SDK Error with Break.  <a href="#a5638f861b82f1746ea1af0b384ef8ff1">More...</a><br /></td></tr>
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#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="presig_8c.html#ac362b8d551a6a185f226af3be3d931f8">COUNT_OF</a>(A)&#160;&#160;&#160;(sizeof(A) / sizeof((A)[0]))</td></tr>
<tr class="memdesc:ac362b8d551a6a185f226af3be3d931f8"><td class="mdescLeft">&#160;</td><td class="mdescRight">Count of elements in array. <br /></td></tr>
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Functions</h2></td></tr>
<tr class="memitem:a0423e8400abd2171062e4c42b90b8145"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group___error_codes.html#gafdb27c77c2c4b32c807e326a8a0da360">EpidStatus</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="presig_8c.html#a0423e8400abd2171062e4c42b90b8145">EpidComputePreSig</a> (<a class="el" href="struct_member_ctx.html">MemberCtx</a> const *ctx, <a class="el" href="struct_pre_computed_signature.html">PreComputedSignature</a> *precompsig)</td></tr>
<tr class="memdesc:a0423e8400abd2171062e4c42b90b8145"><td class="mdescLeft">&#160;</td><td class="mdescRight">Performs Pre-computation that can be used to speed up signing.  <a href="#a0423e8400abd2171062e4c42b90b8145">More...</a><br /></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>EpidComputePreSig implementation. </p>
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          <td class="memname">#define BREAK_ON_EPID_ERROR</td>
          <td>(</td>
          <td class="paramtype">&#160;</td>
          <td class="paramname">ret</td><td>)</td>
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<b>Value:</b><div class="fragment"><div class="line"><span class="keywordflow">if</span> (<a class="code" href="group___error_codes.html#ggafdb27c77c2c4b32c807e326a8a0da360a8a6861e14322ca9193498ffc955537f9">kEpidNoErr</a> != (ret)) {     \</div><div class="line">    break;                       \</div><div class="line">  }</div><div class="ttc" id="group___error_codes_html_ggafdb27c77c2c4b32c807e326a8a0da360a8a6861e14322ca9193498ffc955537f9"><div class="ttname"><a href="group___error_codes.html#ggafdb27c77c2c4b32c807e326a8a0da360a8a6861e14322ca9193498ffc955537f9">kEpidNoErr</a></div><div class="ttdoc">no error </div><div class="ttdef"><b>Definition:</b> errors.h:41</div></div>
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<p>Handle SDK Error with Break. </p>

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          <td class="memname"><a class="el" href="group___error_codes.html#gafdb27c77c2c4b32c807e326a8a0da360">EpidStatus</a> EpidComputePreSig </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="struct_member_ctx.html">MemberCtx</a> const *&#160;</td>
          <td class="paramname"><em>ctx</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="struct_pre_computed_signature.html">PreComputedSignature</a> *&#160;</td>
          <td class="paramname"><em>precompsig</em>&#160;</td>
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          <td>)</td>
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<p>Performs Pre-computation that can be used to speed up signing. </p>
<dl class="section warning"><dt>Warning</dt><dd>Do not re-use the same pre-computed signature to generate more than one signature. If a pre-computed signature is used for computing two signatures, an attacker could learn the Intel(R) EPID private key.</dd></dl>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">ctx</td><td>The member context. </td></tr>
    <tr><td class="paramdir">[out]</td><td class="paramname">precompsig</td><td>The pre-computed signature.</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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