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26 <div id="projectname">Platform Security Architecture — cryptography and keystore interface
27 &#160;<span id="projectnumber">beta 1 — 2019-01-21</span>
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77
78<div class="header">
79 <div class="summary">
80<a href="#func-members">Functions</a> </div>
81 <div class="headertitle">
82<div class="title">Key management</div> </div>
83</div><!--header-->
84<div class="contents">
85<table class="memberdecls">
86<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
87Functions</h2></td></tr>
88<tr class="memitem:ga1e4825ab59260aeb3bdbb3ff07210022"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__error.html#ga05676e70ba5c6a7565aff3c36677c1f9">psa_status_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__key__management.html#ga1e4825ab59260aeb3bdbb3ff07210022">psa_get_key_lifetime</a> (<a class="el" href="group__platform.html#gabf6d5fd4e2ea89ecd425c88f057e7f75">psa_key_handle_t</a> handle, <a class="el" href="group__key__lifetimes.html#ga6821ff6dd39dc2bc370ded760ad8b0cf">psa_key_lifetime_t</a> *lifetime)</td></tr>
89<tr class="memdesc:ga1e4825ab59260aeb3bdbb3ff07210022"><td class="mdescLeft">&#160;</td><td class="mdescRight">Retrieve the lifetime of an open key. <a href="#ga1e4825ab59260aeb3bdbb3ff07210022">More...</a><br /></td></tr>
90<tr class="separator:ga1e4825ab59260aeb3bdbb3ff07210022"><td class="memSeparator" colspan="2">&#160;</td></tr>
91<tr class="memitem:ga40094b77b7a42b9c8e158395113f1a35"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__error.html#ga05676e70ba5c6a7565aff3c36677c1f9">psa_status_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__key__management.html#ga40094b77b7a42b9c8e158395113f1a35">psa_allocate_key</a> (<a class="el" href="group__platform.html#gabf6d5fd4e2ea89ecd425c88f057e7f75">psa_key_handle_t</a> *handle)</td></tr>
92<tr class="separator:ga40094b77b7a42b9c8e158395113f1a35"><td class="memSeparator" colspan="2">&#160;</td></tr>
93<tr class="memitem:gaa9f1c848cf78b80fe2a7b18bb7ccec50"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__error.html#ga05676e70ba5c6a7565aff3c36677c1f9">psa_status_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__key__management.html#gaa9f1c848cf78b80fe2a7b18bb7ccec50">psa_open_key</a> (<a class="el" href="group__key__lifetimes.html#ga6821ff6dd39dc2bc370ded760ad8b0cf">psa_key_lifetime_t</a> lifetime, <a class="el" href="group__key__lifetimes.html#ga11e986351c65bd3dc3c0fe2cd9926e4b">psa_key_id_t</a> id, <a class="el" href="group__platform.html#gabf6d5fd4e2ea89ecd425c88f057e7f75">psa_key_handle_t</a> *handle)</td></tr>
94<tr class="separator:gaa9f1c848cf78b80fe2a7b18bb7ccec50"><td class="memSeparator" colspan="2">&#160;</td></tr>
95<tr class="memitem:ga4108f255d3eaa6d23a7a14b684af8d7c"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__error.html#ga05676e70ba5c6a7565aff3c36677c1f9">psa_status_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__key__management.html#ga4108f255d3eaa6d23a7a14b684af8d7c">psa_create_key</a> (<a class="el" href="group__key__lifetimes.html#ga6821ff6dd39dc2bc370ded760ad8b0cf">psa_key_lifetime_t</a> lifetime, <a class="el" href="group__key__lifetimes.html#ga11e986351c65bd3dc3c0fe2cd9926e4b">psa_key_id_t</a> id, <a class="el" href="group__platform.html#gabf6d5fd4e2ea89ecd425c88f057e7f75">psa_key_handle_t</a> *handle)</td></tr>
96<tr class="separator:ga4108f255d3eaa6d23a7a14b684af8d7c"><td class="memSeparator" colspan="2">&#160;</td></tr>
97<tr class="memitem:gaa09b720d299dfe6b9f41c36e448078eb"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__error.html#ga05676e70ba5c6a7565aff3c36677c1f9">psa_status_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__key__management.html#gaa09b720d299dfe6b9f41c36e448078eb">psa_close_key</a> (<a class="el" href="group__platform.html#gabf6d5fd4e2ea89ecd425c88f057e7f75">psa_key_handle_t</a> handle)</td></tr>
98<tr class="separator:gaa09b720d299dfe6b9f41c36e448078eb"><td class="memSeparator" colspan="2">&#160;</td></tr>
99</table>
100<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
101<h2 class="groupheader">Function Documentation</h2>
102<a class="anchor" id="ga40094b77b7a42b9c8e158395113f1a35"></a>
103<div class="memitem">
104<div class="memproto">
105 <table class="memname">
106 <tr>
107 <td class="memname"><a class="el" href="group__error.html#ga05676e70ba5c6a7565aff3c36677c1f9">psa_status_t</a> psa_allocate_key </td>
108 <td>(</td>
109 <td class="paramtype"><a class="el" href="group__platform.html#gabf6d5fd4e2ea89ecd425c88f057e7f75">psa_key_handle_t</a> *&#160;</td>
110 <td class="paramname"><em>handle</em></td><td>)</td>
111 <td></td>
112 </tr>
113 </table>
114</div><div class="memdoc">
115<p>Allocate a key slot for a transient key, i.e. a key which is only stored in volatile memory.</p>
116<p>The allocated key slot and its handle remain valid until the application calls <a class="el" href="group__key__management.html#gaa09b720d299dfe6b9f41c36e448078eb">psa_close_key()</a> or <a class="el" href="group__import__export.html#ga165085fc1bc7a78b91792fdd94ae102c" title="Destroy a key. ">psa_destroy_key()</a> or until the application terminates.</p>
117<dl class="params"><dt>Parameters</dt><dd>
118 <table class="params">
119 <tr><td class="paramdir">[out]</td><td class="paramname">handle</td><td>On success, a handle to a volatile key slot.</td></tr>
120 </table>
121 </dd>
122</dl>
123<dl class="retval"><dt>Return values</dt><dd>
124 <table class="retval">
125 <tr><td class="paramname"><a class="el" href="group__error.html#ga4cc859e2c66ca381c7418db3527a65e1">PSA_SUCCESS</a></td><td>Success. The application can now use the value of <code>*handle</code> to access the newly allocated key slot. </td></tr>
126 <tr><td class="paramname"><a class="el" href="group__error.html#ga91b2ad8a867517a2651f1b076c5216e5">PSA_ERROR_INSUFFICIENT_MEMORY</a></td><td>There was not enough memory, or the maximum number of key slots has been reached. </td></tr>
127 </table>
128 </dd>
129</dl>
130
131</div>
132</div>
133<a class="anchor" id="gaa09b720d299dfe6b9f41c36e448078eb"></a>
134<div class="memitem">
135<div class="memproto">
136 <table class="memname">
137 <tr>
138 <td class="memname"><a class="el" href="group__error.html#ga05676e70ba5c6a7565aff3c36677c1f9">psa_status_t</a> psa_close_key </td>
139 <td>(</td>
140 <td class="paramtype"><a class="el" href="group__platform.html#gabf6d5fd4e2ea89ecd425c88f057e7f75">psa_key_handle_t</a>&#160;</td>
141 <td class="paramname"><em>handle</em></td><td>)</td>
142 <td></td>
143 </tr>
144 </table>
145</div><div class="memdoc">
146<p>Close a key handle.</p>
147<p>If the handle designates a volatile key, destroy the key material and free all associated resources, just like <a class="el" href="group__import__export.html#ga165085fc1bc7a78b91792fdd94ae102c" title="Destroy a key. ">psa_destroy_key()</a>.</p>
148<p>If the handle designates a persistent key, free all resources associated with the key in volatile memory. The key slot in persistent storage is not affected and can be opened again later with <a class="el" href="group__key__management.html#gaa9f1c848cf78b80fe2a7b18bb7ccec50">psa_open_key()</a>.</p>
149<p>If the key is currently in use in a multipart operation, the multipart operation is aborted.</p>
150<dl class="params"><dt>Parameters</dt><dd>
151 <table class="params">
152 <tr><td class="paramname">handle</td><td>The key handle to close.</td></tr>
153 </table>
154 </dd>
155</dl>
156<dl class="retval"><dt>Return values</dt><dd>
157 <table class="retval">
158 <tr><td class="paramname"><a class="el" href="group__error.html#ga4cc859e2c66ca381c7418db3527a65e1">PSA_SUCCESS</a></td><td></td></tr>
159 <tr><td class="paramname"><a class="el" href="group__error.html#gadf22718935657c2c3168c228204085f9">PSA_ERROR_INVALID_HANDLE</a></td><td></td></tr>
160 <tr><td class="paramname"><a class="el" href="group__error.html#ga5cdb6948371d49e916106249020ea3f7">PSA_ERROR_COMMUNICATION_FAILURE</a></td><td></td></tr>
161 </table>
162 </dd>
163</dl>
164
165</div>
166</div>
167<a class="anchor" id="ga4108f255d3eaa6d23a7a14b684af8d7c"></a>
168<div class="memitem">
169<div class="memproto">
170 <table class="memname">
171 <tr>
172 <td class="memname"><a class="el" href="group__error.html#ga05676e70ba5c6a7565aff3c36677c1f9">psa_status_t</a> psa_create_key </td>
173 <td>(</td>
174 <td class="paramtype"><a class="el" href="group__key__lifetimes.html#ga6821ff6dd39dc2bc370ded760ad8b0cf">psa_key_lifetime_t</a>&#160;</td>
175 <td class="paramname"><em>lifetime</em>, </td>
176 </tr>
177 <tr>
178 <td class="paramkey"></td>
179 <td></td>
180 <td class="paramtype"><a class="el" href="group__key__lifetimes.html#ga11e986351c65bd3dc3c0fe2cd9926e4b">psa_key_id_t</a>&#160;</td>
181 <td class="paramname"><em>id</em>, </td>
182 </tr>
183 <tr>
184 <td class="paramkey"></td>
185 <td></td>
186 <td class="paramtype"><a class="el" href="group__platform.html#gabf6d5fd4e2ea89ecd425c88f057e7f75">psa_key_handle_t</a> *&#160;</td>
187 <td class="paramname"><em>handle</em>&#160;</td>
188 </tr>
189 <tr>
190 <td></td>
191 <td>)</td>
192 <td></td><td></td>
193 </tr>
194 </table>
195</div><div class="memdoc">
196<p>Create a new persistent key slot.</p>
197<p>Create a new persistent key slot and return a handle to it. The handle remains valid until the application calls <a class="el" href="group__key__management.html#gaa09b720d299dfe6b9f41c36e448078eb">psa_close_key()</a> or terminates. The application can open the key again with <a class="el" href="group__key__management.html#gaa9f1c848cf78b80fe2a7b18bb7ccec50">psa_open_key()</a> until it removes the key by calling <a class="el" href="group__import__export.html#ga165085fc1bc7a78b91792fdd94ae102c" title="Destroy a key. ">psa_destroy_key()</a>.</p>
198<dl class="params"><dt>Parameters</dt><dd>
199 <table class="params">
200 <tr><td class="paramdir"></td><td class="paramname">lifetime</td><td>The lifetime of the key. This designates a storage area where the key material is stored. This must not be <a class="el" href="group__key__lifetimes.html#ga8b438870ba69489b685730d346455108">PSA_KEY_LIFETIME_VOLATILE</a>. </td></tr>
201 <tr><td class="paramdir"></td><td class="paramname">id</td><td>The persistent identifier of the key. </td></tr>
202 <tr><td class="paramdir">[out]</td><td class="paramname">handle</td><td>On success, a handle to the newly created key slot. When key material is later created in this key slot, it will be saved to the specified persistent location.</td></tr>
203 </table>
204 </dd>
205</dl>
206<dl class="retval"><dt>Return values</dt><dd>
207 <table class="retval">
208 <tr><td class="paramname"><a class="el" href="group__error.html#ga4cc859e2c66ca381c7418db3527a65e1">PSA_SUCCESS</a></td><td>Success. The application can now use the value of <code>*handle</code> to access the newly allocated key slot. </td></tr>
209 <tr><td class="paramname"><a class="el" href="group__error.html#ga91b2ad8a867517a2651f1b076c5216e5">PSA_ERROR_INSUFFICIENT_MEMORY</a></td><td></td></tr>
210 <tr><td class="paramname"><a class="el" href="group__error.html#ga897a45eb206a6f6b7be7ffbe36f0d766">PSA_ERROR_INSUFFICIENT_STORAGE</a></td><td></td></tr>
211 <tr><td class="paramname"><a class="el" href="group__error.html#gac2fee3a51249fbea45360aaa911f3e58">PSA_ERROR_OCCUPIED_SLOT</a></td><td>There is already a key with the identifier <code>id</code> in the storage area designated by <code>lifetime</code>. </td></tr>
212 <tr><td class="paramname"><a class="el" href="group__error.html#ga798df25a505ebf931f7bec1f80f1f85f">PSA_ERROR_INVALID_ARGUMENT</a></td><td><code>lifetime</code> is invalid, for example <a class="el" href="group__key__lifetimes.html#ga8b438870ba69489b685730d346455108">PSA_KEY_LIFETIME_VOLATILE</a>. </td></tr>
213 <tr><td class="paramname"><a class="el" href="group__error.html#ga798df25a505ebf931f7bec1f80f1f85f">PSA_ERROR_INVALID_ARGUMENT</a></td><td><code>id</code> is invalid for the specified lifetime. </td></tr>
214 <tr><td class="paramname"><a class="el" href="group__error.html#ga1dcc6d130633ed5db8942257581b55dd">PSA_ERROR_NOT_SUPPORTED</a></td><td><code>lifetime</code> is not supported. </td></tr>
215 <tr><td class="paramname"><a class="el" href="group__error.html#ga4d1b8dd8526177a15a210b7afc1accb1">PSA_ERROR_NOT_PERMITTED</a></td><td><code>lifetime</code> is valid, but the application does not have the permission to create a key there. </td></tr>
216 </table>
217 </dd>
218</dl>
219
220</div>
221</div>
222<a class="anchor" id="ga1e4825ab59260aeb3bdbb3ff07210022"></a>
223<div class="memitem">
224<div class="memproto">
225 <table class="memname">
226 <tr>
227 <td class="memname"><a class="el" href="group__error.html#ga05676e70ba5c6a7565aff3c36677c1f9">psa_status_t</a> psa_get_key_lifetime </td>
228 <td>(</td>
229 <td class="paramtype"><a class="el" href="group__platform.html#gabf6d5fd4e2ea89ecd425c88f057e7f75">psa_key_handle_t</a>&#160;</td>
230 <td class="paramname"><em>handle</em>, </td>
231 </tr>
232 <tr>
233 <td class="paramkey"></td>
234 <td></td>
235 <td class="paramtype"><a class="el" href="group__key__lifetimes.html#ga6821ff6dd39dc2bc370ded760ad8b0cf">psa_key_lifetime_t</a> *&#160;</td>
236 <td class="paramname"><em>lifetime</em>&#160;</td>
237 </tr>
238 <tr>
239 <td></td>
240 <td>)</td>
241 <td></td><td></td>
242 </tr>
243 </table>
244</div><div class="memdoc">
245
246<p>Retrieve the lifetime of an open key. </p>
247<dl class="params"><dt>Parameters</dt><dd>
248 <table class="params">
249 <tr><td class="paramdir"></td><td class="paramname">handle</td><td>Handle to query. </td></tr>
250 <tr><td class="paramdir">[out]</td><td class="paramname">lifetime</td><td>On success, the lifetime value.</td></tr>
251 </table>
252 </dd>
253</dl>
254<dl class="retval"><dt>Return values</dt><dd>
255 <table class="retval">
256 <tr><td class="paramname"><a class="el" href="group__error.html#ga4cc859e2c66ca381c7418db3527a65e1">PSA_SUCCESS</a></td><td>Success. </td></tr>
257 <tr><td class="paramname"><a class="el" href="group__error.html#gadf22718935657c2c3168c228204085f9">PSA_ERROR_INVALID_HANDLE</a></td><td></td></tr>
258 <tr><td class="paramname"><a class="el" href="group__error.html#ga5cdb6948371d49e916106249020ea3f7">PSA_ERROR_COMMUNICATION_FAILURE</a></td><td></td></tr>
259 <tr><td class="paramname"><a class="el" href="group__error.html#ga08b10e70fa5ff0b05c631d9f8f6b2c6b">PSA_ERROR_HARDWARE_FAILURE</a></td><td></td></tr>
260 <tr><td class="paramname"><a class="el" href="group__error.html#ga2c5dda1485cb54f2385cb9c1279a7004">PSA_ERROR_TAMPERING_DETECTED</a></td><td></td></tr>
261 <tr><td class="paramname"><a class="el" href="group__error.html#ga933d40fa2a591004f2e93aa91e11db84">PSA_ERROR_BAD_STATE</a></td><td>The library has not been previously initialized by <a class="el" href="group__initialization.html#ga2de150803fc2f7dc6101d5af7e921dd9" title="Library initialization. ">psa_crypto_init()</a>. It is implementation-dependent whether a failure to initialize results in this error code. </td></tr>
262 </table>
263 </dd>
264</dl>
265
266</div>
267</div>
268<a class="anchor" id="gaa9f1c848cf78b80fe2a7b18bb7ccec50"></a>
269<div class="memitem">
270<div class="memproto">
271 <table class="memname">
272 <tr>
273 <td class="memname"><a class="el" href="group__error.html#ga05676e70ba5c6a7565aff3c36677c1f9">psa_status_t</a> psa_open_key </td>
274 <td>(</td>
275 <td class="paramtype"><a class="el" href="group__key__lifetimes.html#ga6821ff6dd39dc2bc370ded760ad8b0cf">psa_key_lifetime_t</a>&#160;</td>
276 <td class="paramname"><em>lifetime</em>, </td>
277 </tr>
278 <tr>
279 <td class="paramkey"></td>
280 <td></td>
281 <td class="paramtype"><a class="el" href="group__key__lifetimes.html#ga11e986351c65bd3dc3c0fe2cd9926e4b">psa_key_id_t</a>&#160;</td>
282 <td class="paramname"><em>id</em>, </td>
283 </tr>
284 <tr>
285 <td class="paramkey"></td>
286 <td></td>
287 <td class="paramtype"><a class="el" href="group__platform.html#gabf6d5fd4e2ea89ecd425c88f057e7f75">psa_key_handle_t</a> *&#160;</td>
288 <td class="paramname"><em>handle</em>&#160;</td>
289 </tr>
290 <tr>
291 <td></td>
292 <td>)</td>
293 <td></td><td></td>
294 </tr>
295 </table>
296</div><div class="memdoc">
297<p>Open a handle to an existing persistent key.</p>
298<p>Open a handle to a key which was previously created with <a class="el" href="group__key__management.html#ga4108f255d3eaa6d23a7a14b684af8d7c">psa_create_key()</a>.</p>
299<dl class="params"><dt>Parameters</dt><dd>
300 <table class="params">
301 <tr><td class="paramdir"></td><td class="paramname">lifetime</td><td>The lifetime of the key. This designates a storage area where the key material is stored. This must not be <a class="el" href="group__key__lifetimes.html#ga8b438870ba69489b685730d346455108">PSA_KEY_LIFETIME_VOLATILE</a>. </td></tr>
302 <tr><td class="paramdir"></td><td class="paramname">id</td><td>The persistent identifier of the key. </td></tr>
303 <tr><td class="paramdir">[out]</td><td class="paramname">handle</td><td>On success, a handle to a key slot which contains the data and metadata loaded from the specified persistent location.</td></tr>
304 </table>
305 </dd>
306</dl>
307<dl class="retval"><dt>Return values</dt><dd>
308 <table class="retval">
309 <tr><td class="paramname"><a class="el" href="group__error.html#ga4cc859e2c66ca381c7418db3527a65e1">PSA_SUCCESS</a></td><td>Success. The application can now use the value of <code>*handle</code> to access the newly allocated key slot. </td></tr>
310 <tr><td class="paramname"><a class="el" href="group__error.html#ga91b2ad8a867517a2651f1b076c5216e5">PSA_ERROR_INSUFFICIENT_MEMORY</a></td><td></td></tr>
311 <tr><td class="paramname"><a class="el" href="group__error.html#gaba00e3e6ceb2b12965a81e5ac02ae040">PSA_ERROR_EMPTY_SLOT</a></td><td></td></tr>
312 <tr><td class="paramname"><a class="el" href="group__error.html#ga798df25a505ebf931f7bec1f80f1f85f">PSA_ERROR_INVALID_ARGUMENT</a></td><td><code>lifetime</code> is invalid, for example <a class="el" href="group__key__lifetimes.html#ga8b438870ba69489b685730d346455108">PSA_KEY_LIFETIME_VOLATILE</a>. </td></tr>
313 <tr><td class="paramname"><a class="el" href="group__error.html#ga798df25a505ebf931f7bec1f80f1f85f">PSA_ERROR_INVALID_ARGUMENT</a></td><td><code>id</code> is invalid for the specified lifetime. </td></tr>
314 <tr><td class="paramname"><a class="el" href="group__error.html#ga1dcc6d130633ed5db8942257581b55dd">PSA_ERROR_NOT_SUPPORTED</a></td><td><code>lifetime</code> is not supported. </td></tr>
315 <tr><td class="paramname"><a class="el" href="group__error.html#ga4d1b8dd8526177a15a210b7afc1accb1">PSA_ERROR_NOT_PERMITTED</a></td><td>The specified key exists, but the application does not have the permission to access it. Note that this specification does not define any way to create such a key, but it may be possible through implementation-specific means. </td></tr>
316 </table>
317 </dd>
318</dl>
319
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