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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">Fapi_GetRandom<div class="ingroups"><a class="el" href="group__fapi.html">Feature API</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:gab28cfb916c0116cdafa54a0af0c467df"><td class="memItemLeft" align="right" valign="top">TSS2_RC&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___fapi___get_random.html#gab28cfb916c0116cdafa54a0af0c467df">Fapi_GetRandom</a> (<a class="el" href="struct_f_a_p_i___c_o_n_t_e_x_t.html">FAPI_CONTEXT</a> *context, size_t numBytes, uint8_t **data)</td></tr>
<tr class="separator:gab28cfb916c0116cdafa54a0af0c467df"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gacbdf46c1990d90c9a06abc24043d7bbc"><td class="memItemLeft" align="right" valign="top">TSS2_RC&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___fapi___get_random.html#gacbdf46c1990d90c9a06abc24043d7bbc">Fapi_GetRandom_Async</a> (<a class="el" href="struct_f_a_p_i___c_o_n_t_e_x_t.html">FAPI_CONTEXT</a> *context, size_t numBytes)</td></tr>
<tr class="separator:gacbdf46c1990d90c9a06abc24043d7bbc"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gafb248c32b411573fd950e238885898c8"><td class="memItemLeft" align="right" valign="top">TSS2_RC&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___fapi___get_random.html#gafb248c32b411573fd950e238885898c8">Fapi_GetRandom_Finish</a> (<a class="el" href="struct_f_a_p_i___c_o_n_t_e_x_t.html">FAPI_CONTEXT</a> *context, uint8_t **data)</td></tr>
<tr class="separator:gafb248c32b411573fd950e238885898c8"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<p>FAPI functions to invoke GetRandom either as one-call or in an asynchronous manner. </p>
<h2 class="groupheader">Function Documentation</h2>
<a id="gab28cfb916c0116cdafa54a0af0c467df"></a>
<h2 class="memtitle"><span class="permalink"><a href="#gab28cfb916c0116cdafa54a0af0c467df">&#9670;&nbsp;</a></span>Fapi_GetRandom()</h2>

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          <td class="memname">Fapi_GetRandom </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="struct_f_a_p_i___c_o_n_t_e_x_t.html">FAPI_CONTEXT</a> *&#160;</td>
          <td class="paramname"><em>context</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">size_t&#160;</td>
          <td class="paramname"><em>numBytes</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint8_t **&#160;</td>
          <td class="paramname"><em>data</em>&#160;</td>
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        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
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<p>One-Call function for Fapi_GetRandom</p>
<p>Creates an array with a specified number of bytes. May execute the underlying TPM command multiple times if the requested number of bytes is too big.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in,out]</td><td class="paramname">context</td><td>The <a class="el" href="struct_f_a_p_i___c_o_n_t_e_x_t.html">FAPI_CONTEXT</a> </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">numBytes</td><td>The number of bytes requested from the TPM </td></tr>
    <tr><td class="paramdir">[out]</td><td class="paramname">data</td><td>The array of random bytes returned from the TPM</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_FAPI_RC_BAD_REFERENCE</td><td>if context or data is NULL. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_BAD_CONTEXT</td><td>if context corruption is detected. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_BAD_VALUE</td><td>if numBytes is 0. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_BAD_SEQUENCE</td><td>if the context has an asynchronous operation already pending. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_IO_ERROR</td><td>if the data cannot be saved. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_MEMORY</td><td>if the FAPI cannot allocate enough memory for internal operations or return parameters. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_NO_TPM</td><td>if FAPI was initialized in no-TPM-mode via its config file. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_PATH_NOT_FOUND</td><td>if a FAPI object path was not found during authorization. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_KEY_NOT_FOUND</td><td>if a key was not found. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_TRY_AGAIN</td><td>if an I/O operation is not finished yet and this function needs to be called again. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_GENERAL_FAILURE</td><td>if an internal error occurred. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_AUTHORIZATION_UNKNOWN</td><td>if a required authorization callback is not set. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_AUTHORIZATION_FAILED</td><td>if the authorization attempt fails. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_POLICY_UNKNOWN</td><td>if policy search for a certain policy digest was not successful. </td></tr>
    <tr><td class="paramname">TSS2_ESYS_RC_*</td><td>possible error codes of ESAPI. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_NOT_PROVISIONED</td><td>FAPI was not provisioned. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_BAD_PATH</td><td>if the path is used in inappropriate context or contains illegal characters. </td></tr>
  </table>
  </dd>
</dl>

</div>
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<a id="gacbdf46c1990d90c9a06abc24043d7bbc"></a>
<h2 class="memtitle"><span class="permalink"><a href="#gacbdf46c1990d90c9a06abc24043d7bbc">&#9670;&nbsp;</a></span>Fapi_GetRandom_Async()</h2>

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          <td class="memname">Fapi_GetRandom_Async </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="struct_f_a_p_i___c_o_n_t_e_x_t.html">FAPI_CONTEXT</a> *&#160;</td>
          <td class="paramname"><em>context</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">size_t&#160;</td>
          <td class="paramname"><em>numBytes</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">
<p>Asynchronous function for Fapi_GetRandom</p>
<p>Creates an array with a specified number of bytes. May execute the underlying TPM command multiple times if the requested number of bytes is too big.</p>
<p>Call Fapi_GetRandom_Finish to finish the execution of this command.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in,out]</td><td class="paramname">context</td><td>The <a class="el" href="struct_f_a_p_i___c_o_n_t_e_x_t.html">FAPI_CONTEXT</a> </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">numBytes</td><td>The number of bytes requested from the TPM</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_FAPI_RC_BAD_REFERENCE</td><td>if context is NULL. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_BAD_CONTEXT</td><td>if context corruption is detected. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_BAD_VALUE</td><td>if numBytes is 0. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_BAD_SEQUENCE</td><td>if the context has an asynchronous operation already pending. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_IO_ERROR</td><td>if the data cannot be saved. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_MEMORY</td><td>if the FAPI cannot allocate enough memory for internal operations or return parameters. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_NO_TPM</td><td>if FAPI was initialized in no-TPM-mode via its config file. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_PATH_NOT_FOUND</td><td>if a FAPI object path was not found during authorization. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_KEY_NOT_FOUND</td><td>if a key was not found. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_NOT_PROVISIONED</td><td>FAPI was not provisioned. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_BAD_PATH</td><td>if the path is used in inappropriate context or contains illegal characters. </td></tr>
  </table>
  </dd>
</dl>

</div>
</div>
<a id="gafb248c32b411573fd950e238885898c8"></a>
<h2 class="memtitle"><span class="permalink"><a href="#gafb248c32b411573fd950e238885898c8">&#9670;&nbsp;</a></span>Fapi_GetRandom_Finish()</h2>

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<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">Fapi_GetRandom_Finish </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="struct_f_a_p_i___c_o_n_t_e_x_t.html">FAPI_CONTEXT</a> *&#160;</td>
          <td class="paramname"><em>context</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint8_t **&#160;</td>
          <td class="paramname"><em>data</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">
<p>Asynchronous finish function for Fapi_GetRandom</p>
<p>This function should be called after a previous Fapi_GetRandom_Async.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in,out]</td><td class="paramname">context</td><td>The <a class="el" href="struct_f_a_p_i___c_o_n_t_e_x_t.html">FAPI_CONTEXT</a> </td></tr>
    <tr><td class="paramdir">[out]</td><td class="paramname">data</td><td>The array of random bytes returned from the TPM</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_FAPI_RC_BAD_REFERENCE</td><td>if context or data is NULL. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_BAD_CONTEXT</td><td>if context corruption is detected. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_BAD_SEQUENCE</td><td>if the context has an asynchronous operation already pending. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_IO_ERROR</td><td>if the data cannot be saved. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_MEMORY</td><td>if the FAPI cannot allocate enough memory for internal operations or return parameters. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_TRY_AGAIN</td><td>if the asynchronous operation is not yet complete. Call this function again later. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_GENERAL_FAILURE</td><td>if an internal error occurred. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_BAD_VALUE</td><td>if an invalid value was passed into the function. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_PATH_NOT_FOUND</td><td>if a FAPI object path was not found during authorization. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_KEY_NOT_FOUND</td><td>if a key was not found. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_AUTHORIZATION_UNKNOWN</td><td>if a required authorization callback is not set. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_AUTHORIZATION_FAILED</td><td>if the authorization attempt fails. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_POLICY_UNKNOWN</td><td>if policy search for a certain policy digest was not successful. </td></tr>
    <tr><td class="paramname">TSS2_ESYS_RC_*</td><td>possible error codes of ESAPI. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_NOT_PROVISIONED</td><td>FAPI was not provisioned. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_BAD_PATH</td><td>if the path is used in inappropriate context or contains illegal characters. </td></tr>
  </table>
  </dd>
</dl>

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