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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_Unseal<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:ga0e58e7abd0dcad7501238368671f8ba4"><td class="memItemLeft" align="right" valign="top">TSS2_RC&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___fapi___unseal.html#ga0e58e7abd0dcad7501238368671f8ba4">Fapi_Unseal</a> (<a class="el" href="struct_f_a_p_i___c_o_n_t_e_x_t.html">FAPI_CONTEXT</a> *context, char const *path, uint8_t **data, size_t *size)</td></tr>
<tr class="separator:ga0e58e7abd0dcad7501238368671f8ba4"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gab0df91fa8ad385c70155ef5ed24ebfc5"><td class="memItemLeft" align="right" valign="top">TSS2_RC&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___fapi___unseal.html#gab0df91fa8ad385c70155ef5ed24ebfc5">Fapi_Unseal_Async</a> (<a class="el" href="struct_f_a_p_i___c_o_n_t_e_x_t.html">FAPI_CONTEXT</a> *context, char const *path)</td></tr>
<tr class="separator:gab0df91fa8ad385c70155ef5ed24ebfc5"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga558cf69de54a99f9b3d42066c4b3159f"><td class="memItemLeft" align="right" valign="top">TSS2_RC&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___fapi___unseal.html#ga558cf69de54a99f9b3d42066c4b3159f">Fapi_Unseal_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, size_t *size)</td></tr>
<tr class="separator:ga558cf69de54a99f9b3d42066c4b3159f"><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 Unseal either as one-call or in an asynchronous manner. </p>
<h2 class="groupheader">Function Documentation</h2>
<a id="ga0e58e7abd0dcad7501238368671f8ba4"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga0e58e7abd0dcad7501238368671f8ba4">&#9670;&nbsp;</a></span>Fapi_Unseal()</h2>

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          <td class="memname">Fapi_Unseal </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">char const *&#160;</td>
          <td class="paramname"><em>path</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint8_t **&#160;</td>
          <td class="paramname"><em>data</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">size_t *&#160;</td>
          <td class="paramname"><em>size</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">
<p>One-Call function for Fapi_Unseal</p>
<p>Unseals data from a seal in the FAPI metadata store.</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">path</td><td>The path to the sealed data </td></tr>
    <tr><td class="paramdir">[out]</td><td class="paramname">data</td><td>The decrypted data after unsealing. May be NULL </td></tr>
    <tr><td class="paramdir">[out]</td><td class="paramname">size</td><td>The size of data in bytes. May be NULL</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 path 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_PATH</td><td>if path does not point to a sealed data object. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_BAD_VALUE</td><td>if the digestSize is zero. </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_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_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_GENERAL_FAILURE</td><td>if an internal error occurred. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_SIGNATURE_VERIFICATION_FAILED</td><td>if the signature could not be verified </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_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>
  </table>
  </dd>
</dl>

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<a id="gab0df91fa8ad385c70155ef5ed24ebfc5"></a>
<h2 class="memtitle"><span class="permalink"><a href="#gab0df91fa8ad385c70155ef5ed24ebfc5">&#9670;&nbsp;</a></span>Fapi_Unseal_Async()</h2>

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          <td class="memname">Fapi_Unseal_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">char const *&#160;</td>
          <td class="paramname"><em>path</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">
<p>Asynchronous function for Fapi_Unseal</p>
<p>Unseals data from a seal in the FAPI metadata store.</p>
<p>Call Fapi_Unseal_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">path</td><td>The path to the sealed data</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 path 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_PATH</td><td>if path does not point to a sealed data object. </td></tr>
    <tr><td class="paramname">TSS2_FAPI_RC_BAD_VALUE</td><td>if the digestSize is zero. </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>
  </table>
  </dd>
</dl>

</div>
</div>
<a id="ga558cf69de54a99f9b3d42066c4b3159f"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga558cf69de54a99f9b3d42066c4b3159f">&#9670;&nbsp;</a></span>Fapi_Unseal_Finish()</h2>

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          <td class="memname">Fapi_Unseal_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>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">size_t *&#160;</td>
          <td class="paramname"><em>size</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_Unseal</p>
<p>This function should be called after a previous Fapi_Unseal_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 decrypted data after unsealing. May be NULL </td></tr>
    <tr><td class="paramdir">[out]</td><td class="paramname">size</td><td>The size of data in bytes. May be NULL</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_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_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_BAD_VALUE</td><td>if an invalid value was passed into the function. </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_SIGNATURE_VERIFICATION_FAILED</td><td>if the signature could not be verified </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>
    <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>
  </table>
  </dd>
</dl>

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