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   <div id="projectname">tpm2-tss
   &#160;<span id="projectnumber">3.2.0</span>
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   <div id="projectbrief">TPM Software stack 2.0 TCG spec compliant implementation</div>
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<div class="title">The ESAPI function for the TPM2_GetRandom command.<div class="ingroups"><a class="el" href="group__esys.html">Enhanced System API</a> &raquo; <a class="el" href="group__esys__tpm.html">Esys TPM Commands</a></div></div>  </div>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:ga10cb85bcbf47f6d55ce22585d2af5d96"><td class="memItemLeft" align="right" valign="top">TSS2_RC&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___esys___get_random.html#ga10cb85bcbf47f6d55ce22585d2af5d96">Esys_GetRandom_Async</a> (<a class="el" href="group__esys__int.html#struct_e_s_y_s___c_o_n_t_e_x_t">ESYS_CONTEXT</a> *esysContext, <a class="el" href="group___e_s_y_s___t_r.html#ga65d10db3b0b31fcd709e692f1545d30f">ESYS_TR</a> shandle1, <a class="el" href="group___e_s_y_s___t_r.html#ga65d10db3b0b31fcd709e692f1545d30f">ESYS_TR</a> shandle2, <a class="el" href="group___e_s_y_s___t_r.html#ga65d10db3b0b31fcd709e692f1545d30f">ESYS_TR</a> shandle3, UINT16 bytesRequested)</td></tr>
<tr class="separator:ga10cb85bcbf47f6d55ce22585d2af5d96"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gaac727d89d459f8a89fd6eed824f89281"><td class="memItemLeft" align="right" valign="top">TSS2_RC&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___esys___get_random.html#gaac727d89d459f8a89fd6eed824f89281">Esys_GetRandom</a> (<a class="el" href="group__esys__int.html#struct_e_s_y_s___c_o_n_t_e_x_t">ESYS_CONTEXT</a> *esysContext, <a class="el" href="group___e_s_y_s___t_r.html#ga65d10db3b0b31fcd709e692f1545d30f">ESYS_TR</a> shandle1, <a class="el" href="group___e_s_y_s___t_r.html#ga65d10db3b0b31fcd709e692f1545d30f">ESYS_TR</a> shandle2, <a class="el" href="group___e_s_y_s___t_r.html#ga65d10db3b0b31fcd709e692f1545d30f">ESYS_TR</a> shandle3, UINT16 bytesRequested, TPM2B_DIGEST **randomBytes)</td></tr>
<tr class="separator:gaac727d89d459f8a89fd6eed824f89281"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga80704b3d169e70d3fd452e840c64346c"><td class="memItemLeft" align="right" valign="top">TSS2_RC&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___esys___get_random.html#ga80704b3d169e70d3fd452e840c64346c">Esys_GetRandom_Finish</a> (<a class="el" href="group__esys__int.html#struct_e_s_y_s___c_o_n_t_e_x_t">ESYS_CONTEXT</a> *esysContext, TPM2B_DIGEST **randomBytes)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<p>ESAPI function to invoke the TPM2_GetRandom command either as a one-call or in an asynchronous manner. </p>
<h2 class="groupheader">Function Documentation</h2>
<a id="gaac727d89d459f8a89fd6eed824f89281"></a>
<h2 class="memtitle"><span class="permalink"><a href="#gaac727d89d459f8a89fd6eed824f89281">&#9670;&nbsp;</a></span>Esys_GetRandom()</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">TSS2_RC Esys_GetRandom </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="group__esys__int.html#struct_e_s_y_s___c_o_n_t_e_x_t">ESYS_CONTEXT</a> *&#160;</td>
          <td class="paramname"><em>esysContext</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="group___e_s_y_s___t_r.html#ga65d10db3b0b31fcd709e692f1545d30f">ESYS_TR</a>&#160;</td>
          <td class="paramname"><em>shandle1</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="group___e_s_y_s___t_r.html#ga65d10db3b0b31fcd709e692f1545d30f">ESYS_TR</a>&#160;</td>
          <td class="paramname"><em>shandle2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="group___e_s_y_s___t_r.html#ga65d10db3b0b31fcd709e692f1545d30f">ESYS_TR</a>&#160;</td>
          <td class="paramname"><em>shandle3</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">UINT16&#160;</td>
          <td class="paramname"><em>bytesRequested</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">TPM2B_DIGEST **&#160;</td>
          <td class="paramname"><em>randomBytes</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">
<p>One-Call function for TPM2_GetRandom</p>
<p>This function invokes the TPM2_GetRandom command in a one-call variant. This means the function will block until the TPM response is available. All input parameters are const. The memory for non-simple output parameters is allocated by the function implementation.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in,out]</td><td class="paramname">esysContext</td><td>The <a class="el" href="group__esys__int.html#struct_e_s_y_s___c_o_n_t_e_x_t">ESYS_CONTEXT</a>. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">shandle1</td><td>First session handle. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">shandle2</td><td>Second session handle. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">shandle3</td><td>Third session handle. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">bytesRequested</td><td>Number of octets to return. </td></tr>
    <tr><td class="paramdir">[out]</td><td class="paramname">randomBytes</td><td>The random octets. (callee-allocated) </td></tr>
  </table>
  </dd>
</dl>
<dl class="retval"><dt>Return values</dt><dd>
  <table class="retval">
    <tr><td class="paramname">TSS2_RC_SUCCESS</td><td>if the function call was a success. </td></tr>
    <tr><td class="paramname">TSS2_ESYS_RC_BAD_REFERENCE</td><td>if the esysContext or required input pointers or required output handle references are NULL. </td></tr>
    <tr><td class="paramname">TSS2_ESYS_RC_BAD_CONTEXT</td><td>if esysContext corruption is detected. </td></tr>
    <tr><td class="paramname">TSS2_ESYS_RC_MEMORY</td><td>if the ESAPI cannot allocate enough memory for internal operations or return parameters. </td></tr>
    <tr><td class="paramname">TSS2_ESYS_RC_BAD_SEQUENCE</td><td>if the context has an asynchronous operation already pending. </td></tr>
    <tr><td class="paramname">TSS2_ESYS_RC_INSUFFICIENT_RESPONSE</td><td>if the TPM's response does not at least contain the tag, response length, and response code. </td></tr>
    <tr><td class="paramname">TSS2_ESYS_RC_MALFORMED_RESPONSE</td><td>if the TPM's response is corrupted. </td></tr>
    <tr><td class="paramname">TSS2_ESYS_RC_RSP_AUTH_FAILED</td><td>if the response HMAC from the TPM did not verify. </td></tr>
    <tr><td class="paramname">TSS2_ESYS_RC_MULTIPLE_DECRYPT_SESSIONS</td><td>if more than one session has the 'decrypt' attribute bit set. </td></tr>
    <tr><td class="paramname">TSS2_ESYS_RC_MULTIPLE_ENCRYPT_SESSIONS</td><td>if more than one session has the 'encrypt' attribute bit set. </td></tr>
    <tr><td class="paramname">TSS2_ESYS_RC_NO_DECRYPT_PARAM</td><td>if one of the sessions has the 'decrypt' attribute set and the command does not support encryption of the first command parameter. </td></tr>
    <tr><td class="paramname">TSS2_RCs</td><td>produced by lower layers of the software stack may be returned to the caller unaltered unless handled internally. </td></tr>
  </table>
  </dd>
</dl>

</div>
</div>
<a id="ga10cb85bcbf47f6d55ce22585d2af5d96"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga10cb85bcbf47f6d55ce22585d2af5d96">&#9670;&nbsp;</a></span>Esys_GetRandom_Async()</h2>

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<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">TSS2_RC Esys_GetRandom_Async </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="group__esys__int.html#struct_e_s_y_s___c_o_n_t_e_x_t">ESYS_CONTEXT</a> *&#160;</td>
          <td class="paramname"><em>esysContext</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="group___e_s_y_s___t_r.html#ga65d10db3b0b31fcd709e692f1545d30f">ESYS_TR</a>&#160;</td>
          <td class="paramname"><em>shandle1</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="group___e_s_y_s___t_r.html#ga65d10db3b0b31fcd709e692f1545d30f">ESYS_TR</a>&#160;</td>
          <td class="paramname"><em>shandle2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="group___e_s_y_s___t_r.html#ga65d10db3b0b31fcd709e692f1545d30f">ESYS_TR</a>&#160;</td>
          <td class="paramname"><em>shandle3</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">UINT16&#160;</td>
          <td class="paramname"><em>bytesRequested</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">
<p>Asynchronous function for TPM2_GetRandom</p>
<p>This function invokes the TPM2_GetRandom command in a asynchronous variant. This means the function will return as soon as the command has been sent downwards the stack to the TPM. All input parameters are const. In order to retrieve the TPM's response call Esys_GetRandom_Finish.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in,out]</td><td class="paramname">esysContext</td><td>The <a class="el" href="group__esys__int.html#struct_e_s_y_s___c_o_n_t_e_x_t">ESYS_CONTEXT</a>. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">shandle1</td><td>First session handle. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">shandle2</td><td>Second session handle. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">shandle3</td><td>Third session handle. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">bytesRequested</td><td>Number of octets to return. </td></tr>
  </table>
  </dd>
</dl>
<dl class="retval"><dt>Return values</dt><dd>
  <table class="retval">
    <tr><td class="paramname">ESYS_RC_SUCCESS</td><td>if the function call was a success. </td></tr>
    <tr><td class="paramname">TSS2_ESYS_RC_BAD_REFERENCE</td><td>if the esysContext or required input pointers or required output handle references are NULL. </td></tr>
    <tr><td class="paramname">TSS2_ESYS_RC_BAD_CONTEXT</td><td>if esysContext corruption is detected. </td></tr>
    <tr><td class="paramname">TSS2_ESYS_RC_MEMORY</td><td>if the ESAPI cannot allocate enough memory for internal operations or return parameters. </td></tr>
    <tr><td class="paramname">TSS2_RCs</td><td>produced by lower layers of the software stack may be returned to the caller unaltered unless handled internally. </td></tr>
    <tr><td class="paramname">TSS2_ESYS_RC_MULTIPLE_DECRYPT_SESSIONS</td><td>if more than one session has the 'decrypt' attribute bit set. </td></tr>
    <tr><td class="paramname">TSS2_ESYS_RC_MULTIPLE_ENCRYPT_SESSIONS</td><td>if more than one session has the 'encrypt' attribute bit set. </td></tr>
    <tr><td class="paramname">TSS2_ESYS_RC_NO_DECRYPT_PARAM</td><td>if one of the sessions has the 'decrypt' attribute set and the command does not support encryption of the first command parameter. </td></tr>
  </table>
  </dd>
</dl>

</div>
</div>
<a id="ga80704b3d169e70d3fd452e840c64346c"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga80704b3d169e70d3fd452e840c64346c">&#9670;&nbsp;</a></span>Esys_GetRandom_Finish()</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">TSS2_RC Esys_GetRandom_Finish </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="group__esys__int.html#struct_e_s_y_s___c_o_n_t_e_x_t">ESYS_CONTEXT</a> *&#160;</td>
          <td class="paramname"><em>esysContext</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">TPM2B_DIGEST **&#160;</td>
          <td class="paramname"><em>randomBytes</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">
<p>Asynchronous finish function for TPM2_GetRandom</p>
<p>This function returns the results of a TPM2_GetRandom command invoked via Esys_GetRandom_Finish. All non-simple output parameters are allocated by the function's implementation. NULL can be passed for every output parameter if the value is not required.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in,out]</td><td class="paramname">esysContext</td><td>The <a class="el" href="group__esys__int.html#struct_e_s_y_s___c_o_n_t_e_x_t">ESYS_CONTEXT</a>. </td></tr>
    <tr><td class="paramdir">[out]</td><td class="paramname">randomBytes</td><td>The random octets. (callee-allocated) </td></tr>
  </table>
  </dd>
</dl>
<dl class="retval"><dt>Return values</dt><dd>
  <table class="retval">
    <tr><td class="paramname">TSS2_RC_SUCCESS</td><td>on success </td></tr>
    <tr><td class="paramname">ESYS_RC_SUCCESS</td><td>if the function call was a success. </td></tr>
    <tr><td class="paramname">TSS2_ESYS_RC_BAD_REFERENCE</td><td>if the esysContext or required input pointers or required output handle references are NULL. </td></tr>
    <tr><td class="paramname">TSS2_ESYS_RC_BAD_CONTEXT</td><td>if esysContext corruption is detected. </td></tr>
    <tr><td class="paramname">TSS2_ESYS_RC_MEMORY</td><td>if the ESAPI cannot allocate enough memory for internal operations or return parameters. </td></tr>
    <tr><td class="paramname">TSS2_ESYS_RC_BAD_SEQUENCE</td><td>if the context has an asynchronous operation already pending. </td></tr>
    <tr><td class="paramname">TSS2_ESYS_RC_TRY_AGAIN</td><td>if the timeout counter expires before the TPM response is received. </td></tr>
    <tr><td class="paramname">TSS2_ESYS_RC_INSUFFICIENT_RESPONSE</td><td>if the TPM's response does not at least contain the tag, response length, and response code. </td></tr>
    <tr><td class="paramname">TSS2_ESYS_RC_RSP_AUTH_FAILED</td><td>if the response HMAC from the TPM did not verify. </td></tr>
    <tr><td class="paramname">TSS2_ESYS_RC_MALFORMED_RESPONSE</td><td>if the TPM's response is corrupted. </td></tr>
    <tr><td class="paramname">TSS2_RCs</td><td>produced by lower layers of the software stack may be returned to the caller unaltered unless handled internally. </td></tr>
  </table>
  </dd>
</dl>

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