<div class="content"><p> </p><p>Following is the table of elements in the Elliptic Curve
Diffie-Hellman (ECDH) <span><a href="719b890d-62e6-4322-b9b1-1f34d11535b4#gt_6fca10f4-e829-42ab-ad40-1566585060ca" data-linktype="relative-path">private key</a></span> <span><a href="719b890d-62e6-4322-b9b1-1f34d11535b4#gt_ad861812-8cb0-497a-80bb-13c95aa4e425" data-linktype="relative-path">BLOB</a></span>
that MUST be passed to the <span><a href="719b890d-62e6-4322-b9b1-1f34d11535b4#gt_c925d5d7-a442-4ba4-9586-5f94ccec847a" data-linktype="relative-path">CA</a></span>.</p><table>
 <tbody><tr>
  <th><p><br/>0</p></th>
  <th><p><br/>1</p></th>
  <th><p><br/>2</p></th>
  <th><p><br/>3</p></th>
  <th><p><br/>4</p></th>
  <th><p><br/>5</p></th>
  <th><p><br/>6</p></th>
  <th><p><br/>7</p></th>
  <th><p><br/>8</p></th>
  <th><p><br/>9</p></th>
  <th><p>1<br/>0</p></th>
  <th><p><br/>1</p></th>
  <th><p><br/>2</p></th>
  <th><p><br/>3</p></th>
  <th><p><br/>4</p></th>
  <th><p><br/>5</p></th>
  <th><p><br/>6</p></th>
  <th><p><br/>7</p></th>
  <th><p><br/>8</p></th>
  <th><p><br/>9</p></th>
  <th><p>2<br/>0</p></th>
  <th><p><br/>1</p></th>
  <th><p><br/>2</p></th>
  <th><p><br/>3</p></th>
  <th><p><br/>4</p></th>
  <th><p><br/>5</p></th>
  <th><p><br/>6</p></th>
  <th><p><br/>7</p></th>
  <th><p><br/>8</p></th>
  <th><p><br/>9</p></th>
  <th><p>3<br/>0</p></th>
  <th><p><br/>1</p></th>
 </tr>
 <tr>
  <td colspan="32">
  <p>Magic</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>Length</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>XParam
  (variable)</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>...</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>YParam
  (variable)</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>...</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>PrivateExp
  (variable)</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>...</p>
  </td>
 </tr>
</tbody></table><p><b>Magic (4 bytes): </b>The length of this field MUST
be 4 bytes.</p><dl>
<dd>
<p>This field MUST be an unsigned integer in <span><a href="719b890d-62e6-4322-b9b1-1f34d11535b4#gt_079478cb-f4c5-4ce5-b72b-2144da5d2ce7" data-linktype="relative-path">little-endian</a></span>
format.</p>
</dd>
<dd>
<p>Value MUST specify the type of <span><a href="719b890d-62e6-4322-b9b1-1f34d11535b4#gt_718bfd46-3cd2-45e8-befa-55f5c9f3be7b" data-linktype="relative-path">key</a></span>
that this BLOB represents. The possible values for this member MUST be one of
the following.</p>
</dd>
<dd>
<table><thead>
  <tr>
   <th>
   <p>Value</p>
   </th>
   <th>
   <p>Meaning</p>
   </th>
  </tr>
 </thead><tbody><tr>
  <td>
  <p>0x314B4345</p>
  </td>
  <td>
  <p>The key is a 256-bit ECDH <span><a href="719b890d-62e6-4322-b9b1-1f34d11535b4#gt_4cf96ca0-e3a9-4165-8d1a-a21b1397007a" data-linktype="relative-path">public key</a></span>.</p>
  </td>
 </tr><tr>
  <td>
  <p>0x324B4345</p>
  </td>
  <td>
  <p>The key is a 256-bit ECDH private key.</p>
  </td>
 </tr><tr>
  <td>
  <p>0x334B4345</p>
  </td>
  <td>
  <p>The key is a 384-bit ECDH public key.</p>
  </td>
 </tr><tr>
  <td>
  <p>0x344B4345</p>
  </td>
  <td>
  <p>The key is a 384-bit ECDH private key.</p>
  </td>
 </tr><tr>
  <td>
  <p>0x354B4345</p>
  </td>
  <td>
  <p>The key is a 521-bit ECDH public key.</p>
  </td>
 </tr><tr>
  <td>
  <p>0x364B4345</p>
  </td>
  <td>
  <p>The key is a 521-bit ECDH private key.</p>
  </td>
 </tr></tbody></table>
</dd></dl><p><b>Length (4 bytes): </b>The length of this field
MUST be 4 bytes.</p><dl>
<dd>
<p>This field MUST be an unsigned integer in
little-endian format.</p>
</dd>
<dd>
<p>Value MUST be the length, in bytes, of the ECDH key.</p>
</dd></dl><p><b>XParam (variable): </b>The length of this field
MUST be equal to the <b>Length</b> field value.</p><dl>
<dd>
<p>This field MUST be bytes in little-endian format.</p>
</dd>
<dd>
<p>Value MUST be the elliptical curve X parameter.</p>
</dd></dl><p><b>YParam (variable): </b>The length of this field
MUST be equal to the <b>Length</b> field value.</p><dl>
<dd>
<p>This field MUST be bytes in little-endian format.</p>
</dd>
<dd>
<p>Value MUST be the elliptical curve Y parameter.</p>
</dd></dl><p><b>PrivateExp (variable): </b>The length of this
field MUST be equal to the <b>Length</b> field value.</p><dl>
<dd>
<p>This field MUST be bytes in little-endian format.</p>
</dd>
<dd>
<p>Value MUST be the elliptical curve private exponent.</p>
</dd></dl></div>