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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>Heimdal crypto library: RSA functions</title>
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<div class="contents">
<h1>RSA functions</h1><table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">RSA *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__hcrypto__rsa.html#gc7196620864c48d1d6b8377ad8521a4e">RSA_new</a> (void)</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">RSA *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__hcrypto__rsa.html#gd184201d41deee1d1d684974ecc44e5c">RSA_new_method</a> (ENGINE *engine)</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__hcrypto__rsa.html#gf0fbfb9641abf52a10e47c789bbba777">RSA_free</a> (RSA *rsa)</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">int&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__hcrypto__rsa.html#gdb710b16e5e5616f0693801cc60aa943">RSA_up_ref</a> (RSA *rsa)</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">const RSA_METHOD *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__hcrypto__rsa.html#g8a0ab0eaf85ef01f1cc31329558fd37a">RSA_get_method</a> (const RSA *rsa)</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">int&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__hcrypto__rsa.html#gee6501b3b0fe2917a2e40adce6862395">RSA_set_method</a> (RSA *rsa, const RSA_METHOD *method)</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">int&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__hcrypto__rsa.html#ge2af4ebfadf6a1450b823dfc6ca50687">RSA_set_app_data</a> (RSA *rsa, void *arg)</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">void *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__hcrypto__rsa.html#gfcdc9f15c7075cd8434f0c7e59d3db5c">RSA_get_app_data</a> (const RSA *rsa)</td></tr>

</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
See the <a class="el" href="page_rsa.html">RSA - public-key cryptography</a> for description and examples. <hr><h2>Function Documentation</h2>
<a class="anchor" name="gf0fbfb9641abf52a10e47c789bbba777"></a><!-- doxytag: member="rsa.c::RSA_free" ref="gf0fbfb9641abf52a10e47c789bbba777" args="(RSA *rsa)" -->
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">void RSA_free           </td>
          <td>(</td>
          <td class="paramtype">RSA *&nbsp;</td>
          <td class="paramname"> <em>rsa</em>          </td>
          <td>&nbsp;)&nbsp;</td>
          <td></td>
        </tr>
      </table>
</div>
<div class="memdoc">

<p>
Free an allocation RSA object.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>rsa</em>&nbsp;</td><td>the RSA object to free. </td></tr>
  </table>
</dl>

</div>
</div><p>
<a class="anchor" name="gfcdc9f15c7075cd8434f0c7e59d3db5c"></a><!-- doxytag: member="rsa.c::RSA_get_app_data" ref="gfcdc9f15c7075cd8434f0c7e59d3db5c" args="(const RSA *rsa)" -->
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">void* RSA_get_app_data           </td>
          <td>(</td>
          <td class="paramtype">const RSA *&nbsp;</td>
          <td class="paramname"> <em>rsa</em>          </td>
          <td>&nbsp;)&nbsp;</td>
          <td></td>
        </tr>
      </table>
</div>
<div class="memdoc">

<p>
Get the application data for the RSA object.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>rsa</em>&nbsp;</td><td>the rsa object to get the parameter for</td></tr>
  </table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>the data object </dd></dl>

</div>
</div><p>
<a class="anchor" name="g8a0ab0eaf85ef01f1cc31329558fd37a"></a><!-- doxytag: member="rsa.c::RSA_get_method" ref="g8a0ab0eaf85ef01f1cc31329558fd37a" args="(const RSA *rsa)" -->
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          <td class="memname">const RSA_METHOD* RSA_get_method           </td>
          <td>(</td>
          <td class="paramtype">const RSA *&nbsp;</td>
          <td class="paramname"> <em>rsa</em>          </td>
          <td>&nbsp;)&nbsp;</td>
          <td></td>
        </tr>
      </table>
</div>
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<p>
Return the RSA_METHOD used for this RSA object.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>rsa</em>&nbsp;</td><td>the object to get the method from.</td></tr>
  </table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>the method used for this RSA object. </dd></dl>

</div>
</div><p>
<a class="anchor" name="gc7196620864c48d1d6b8377ad8521a4e"></a><!-- doxytag: member="rsa.c::RSA_new" ref="gc7196620864c48d1d6b8377ad8521a4e" args="(void)" -->
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      <table class="memname">
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          <td class="memname">RSA* RSA_new           </td>
          <td>(</td>
          <td class="paramtype">void&nbsp;</td>
          <td class="paramname">          </td>
          <td>&nbsp;)&nbsp;</td>
          <td></td>
        </tr>
      </table>
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<div class="memdoc">

<p>
Same as <a class="el" href="group__hcrypto__rsa.html#gd184201d41deee1d1d684974ecc44e5c">RSA_new_method()</a> using NULL as engine.<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>a newly allocated RSA object. Free with <a class="el" href="group__hcrypto__rsa.html#gf0fbfb9641abf52a10e47c789bbba777">RSA_free()</a>. </dd></dl>

</div>
</div><p>
<a class="anchor" name="gd184201d41deee1d1d684974ecc44e5c"></a><!-- doxytag: member="rsa.c::RSA_new_method" ref="gd184201d41deee1d1d684974ecc44e5c" args="(ENGINE *engine)" -->
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">RSA* RSA_new_method           </td>
          <td>(</td>
          <td class="paramtype">ENGINE *&nbsp;</td>
          <td class="paramname"> <em>engine</em>          </td>
          <td>&nbsp;)&nbsp;</td>
          <td></td>
        </tr>
      </table>
</div>
<div class="memdoc">

<p>
Allocate a new RSA object using the engine, if NULL is specified as the engine, use the default RSA engine as returned by ENGINE_get_default_RSA().<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>engine</em>&nbsp;</td><td>Specific what ENGINE RSA provider should be used.</td></tr>
  </table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>a newly allocated RSA object. Free with <a class="el" href="group__hcrypto__rsa.html#gf0fbfb9641abf52a10e47c789bbba777">RSA_free()</a>. </dd></dl>

</div>
</div><p>
<a class="anchor" name="ge2af4ebfadf6a1450b823dfc6ca50687"></a><!-- doxytag: member="rsa.c::RSA_set_app_data" ref="ge2af4ebfadf6a1450b823dfc6ca50687" args="(RSA *rsa, void *arg)" -->
<div class="memitem">
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      <table class="memname">
        <tr>
          <td class="memname">int RSA_set_app_data           </td>
          <td>(</td>
          <td class="paramtype">RSA *&nbsp;</td>
          <td class="paramname"> <em>rsa</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">void *&nbsp;</td>
          <td class="paramname"> <em>arg</em></td><td>&nbsp;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td><td></td>
        </tr>
      </table>
</div>
<div class="memdoc">

<p>
Set the application data for the RSA object.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>rsa</em>&nbsp;</td><td>the rsa object to set the parameter for </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>arg</em>&nbsp;</td><td>the data object to store</td></tr>
  </table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>1 on success. </dd></dl>

</div>
</div><p>
<a class="anchor" name="gee6501b3b0fe2917a2e40adce6862395"></a><!-- doxytag: member="rsa.c::RSA_set_method" ref="gee6501b3b0fe2917a2e40adce6862395" args="(RSA *rsa, const RSA_METHOD *method)" -->
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      <table class="memname">
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          <td class="memname">int RSA_set_method           </td>
          <td>(</td>
          <td class="paramtype">RSA *&nbsp;</td>
          <td class="paramname"> <em>rsa</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">const RSA_METHOD *&nbsp;</td>
          <td class="paramname"> <em>method</em></td><td>&nbsp;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td><td></td>
        </tr>
      </table>
</div>
<div class="memdoc">

<p>
Set a new method for the RSA keypair.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>rsa</em>&nbsp;</td><td>rsa parameter. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>method</em>&nbsp;</td><td>the new method for the RSA parameter.</td></tr>
  </table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>1 on success. </dd></dl>

</div>
</div><p>
<a class="anchor" name="gdb710b16e5e5616f0693801cc60aa943"></a><!-- doxytag: member="rsa.c::RSA_up_ref" ref="gdb710b16e5e5616f0693801cc60aa943" args="(RSA *rsa)" -->
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">int RSA_up_ref           </td>
          <td>(</td>
          <td class="paramtype">RSA *&nbsp;</td>
          <td class="paramname"> <em>rsa</em>          </td>
          <td>&nbsp;)&nbsp;</td>
          <td></td>
        </tr>
      </table>
</div>
<div class="memdoc">

<p>
Add an extra reference to the RSA object. The object should be free with <a class="el" href="group__hcrypto__rsa.html#gf0fbfb9641abf52a10e47c789bbba777">RSA_free()</a> to drop the reference.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>rsa</em>&nbsp;</td><td>the object to add reference counting too.</td></tr>
  </table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>the current reference count, can't safely be used except for debug printing. </dd></dl>

</div>
</div><p>
</div>
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