xref: /openssl/doc/man7/life_cycle-pkey.pod (revision fecb3aae) 
1=pod
2
3=head1 NAME
4
5life_cycle-pkey - The PKEY algorithm life-cycle
6
7=head1 DESCRIPTION
8
9All public keys (PKEYs) go through a number of stages in their life-cycle:
10
11=over 4
12
13=item start
14
15This state represents the PKEY before it has been allocated.  It is the
16starting state for any life-cycle transitions.
17
18=item newed
19
20This state represents the PKEY after it has been allocated.
21
22=item decapsulate
23
24This state represents the PKEY when it is ready to perform a private key decapsulation
25operation.
26
27=item decrypt
28
29This state represents the PKEY when it is ready to decrypt some ciphertext.
30
31=item derive
32
33This state represents the PKEY when it is ready to derive a shared secret.
34
35=item digest sign
36
37This state represents the PKEY when it is ready to perform a private key signature
38operation.
39
40=item encapsulate
41
42This state represents the PKEY when it is ready to perform a public key encapsulation
43operation.
44
45=item encrypt
46
47This state represents the PKEY when it is ready to encrypt some plaintext.
48
49=item key generation
50
51This state represents the PKEY when it is ready to generate a new public/private key.
52
53=item parameter generation
54
55This state represents the PKEY when it is ready to generate key parameters.
56
57=item verify
58
59This state represents the PKEY when it is ready to verify a public key signature.
60
61=item verify recover
62
63This state represents the PKEY when it is ready to recover a public key signature data.
64
65=item freed
66
67This state is entered when the PKEY is freed.  It is the terminal state
68for all life-cycle transitions.
69
70=back
71
72=head2 State Transition Diagram
73
74The usual life-cycle of a PKEY object is illustrated:
75
76=begin man
77
78                                                   +-------------+
79                                                   |             |
80                                                   |    start    |
81                                                   |             |
82                   EVP_PKEY_derive                 +-------------+
83 +-------------+   EVP_PKEY_derive_set_peer               |                                          +-------------+
84 |             |----------------------------+             |             +----------------------------|             |
85 |   derive    |                            |             |             |  EVP_PKEY_verify           |   verify    |
86 |             |<---------------------------+             |             +--------------------------->|             |
87 +-------------+                                          |                                          +-------------+
88             ^                                            |                                            ^
89             |   EVP_PKEY_derive_init                     |             EVP_PKEY_verify_init           |
90             +---------------------------------------+    |    +---------------------------------------+
91                                                     |    |    |
92 +-------------+                                     |    |    |                                     +-------------+
93 |             |----------------------------+        |    |    |        +----------------------------|             |
94 | digest sign |   EVP_PKEY_sign            |        |    |    |        |  EVP_PKEY_verify_recover   |   verify    |
95 |             |<---------------------------+        |    |    |        +--------------------------->|   recover   |
96 +-------------+                                     |    |    |                                     +-------------+
97             ^                                       |    |    |                                       ^
98             |     EVP_PKEY_sign_init                |    |    |        EVP_PKEY_verify_recover_init   |
99             +---------------------------------+     |    |    |     +---------------------------------+
100                                               |     |    |    |     |
101 +-------------+                               |     |    |    |     |                               +-------------+
102 |             |----------------------------+  |     |    |    |     |  +----------------------------|             |
103 | decapsulate |   EVP_PKEY_decapsulate     |  |     |    |    |     |  |  EVP_PKEY_decrypt          |   decrypt   |
104 |             |<---------------------------+  |     |    v    |     |  +--------------------------->|             |
105 +-------------+                               |   +-------------+   |                               +-------------+
106             ^                                 +---|             |---+                                 ^
107             |     EVP_PKEY_decapsulate_init       |             |      EVP_PKEY_decrypt_init          |
108             +-------------------------------------|    newed    |-------------------------------------+
109                                                   |             |
110                                               +---|             |---+
111 +-------------+                               |   +-------------+   |                               +-------------+
112 |             |----------------------------+  |     |         |     |  +----------------------------|             |
113 | encapsulate |   EVP_PKEY_encapsulate     |  |     |         |     |  |  EVP_PKEY_encrypt          |   encrypt   |
114 |             |<---------------------------+  |     |         |     |  +--------------------------->|             |
115 +-------------+                               |     |         |     |                               +-------------+
116             ^                                 |     |         |     |                                 ^
117             |     EVP_PKEY_encapsulate_init   |     |         |     |  EVP_PKEY_encrypt_init          |
118             +---------------------------------+     |         |     +---------------------------------+
119                                                     |         |
120             +---------------------------------------+         +---------------------------------------+
121             |     EVP_PKEY_paramgen_init                               EVP_PKEY_keygen_init           |
122             v                                                                                         v
123 +-------------+                                                                                     +-------------+
124 |             |----------------------------+                           +----------------------------|             |
125 |  parameter  |                            |                           |                            |     key     |
126 |  generation |<---------------------------+                           +--------------------------->|  generation |
127 +-------------+   EVP_PKEY_paramgen                                       EVP_PKEY_keygen           +-------------+
128                   EVP_PKEY_gen                                            EVP_PKEY_gen
129
130
131                                    + - - - - - +                    +-----------+
132                                    '           ' EVP_PKEY_CTX_free  |           |
133                                    ' any state '------------------->|   freed   |
134                                    '           '                    |           |
135                                    + - - - - - +                    +-----------+
136
137=end man
138
139=for html <img src="img/pkey.png">
140
141=head2 Formal State Transitions
142
143This section defines all of the legal state transitions.
144This is the canonical list.
145
146=begin man
147
148 Function Call                 ---------------------------------------------------------------------- Current State ----------------------------------------------------------------------
149                               start    newed       digest       verify       verify       encrypt      decrypt      derive      encapsulate  decapsulate  parameter       key       freed
150                                                     sign                     recover                                                                      generation   generation
151 EVP_PKEY_CTX_new              newed
152 EVP_PKEY_CTX_new_id           newed
153 EVP_PKEY_CTX_new_from_name    newed
154 EVP_PKEY_CTX_new_from_pkey    newed
155 EVP_PKEY_sign_init                    digest       digest       digest       digest       digest       digest       digest       digest       digest       digest       digest
156                                        sign         sign         sign         sign         sign         sign         sign         sign         sign         sign         sign
157 EVP_PKEY_sign                                      digest
158                                                     sign
159 EVP_PKEY_verify_init                  verify       verify       verify       verify       verify       verify       verify       verify       verify       verify       verify
160 EVP_PKEY_verify                                                 verify
161 EVP_PKEY_verify_recover_init          verify       verify       verify       verify       verify       verify       verify       verify       verify       verify       verify
162                                       recover      recover      recover      recover      recover      recover      recover      recover      recover      recover      recover
163 EVP_PKEY_verify_recover                                                      verify
164                                                                              recover
165 EVP_PKEY_encrypt_init                 encrypt      encrypt      encrypt      encrypt      encrypt      encrypt      encrypt      encrypt      encrypt      encrypt      encrypt
166 EVP_PKEY_encrypt                                                                          encrypt
167 EVP_PKEY_decrypt_init                 decrypt      decrypt      decrypt      decrypt      decrypt      decrypt      decrypt      decrypt      decrypt      decrypt      decrypt
168 EVP_PKEY_decrypt                                                                                       decrypt
169 EVP_PKEY_derive_init                  derive       derive       derive       derive       derive       derive       derive       derive       derive       derive       derive
170 EVP_PKEY_derive_set_peer                                                                                            derive
171 EVP_PKEY_derive                                                                                                     derive
172 EVP_PKEY_encapsulate_init            encapsulate  encapsulate  encapsulate  encapsulate  encapsulate  encapsulate  encapsulate  encapsulate  encapsulate  encapsulate  encapsulate
173 EVP_PKEY_encapsulate                                                                                                            encapsulate
174 EVP_PKEY_decapsulate_init            decapsulate  decapsulate  decapsulate  decapsulate  decapsulate  decapsulate  decapsulate  decapsulate  decapsulate  decapsulate  decapsulate
175 EVP_PKEY_decapsulate                                                                                                                         decapsulate
176 EVP_PKEY_paramgen_init               parameter    parameter    parameter    parameter    parameter    parameter    parameter    parameter    parameter    parameter    parameter
177                                      generation   generation   generation   generation   generation   generation   generation   generation   generation   generation   generation
178 EVP_PKEY_paramgen                                                                                                                                         parameter
179                                                                                                                                                           generation
180 EVP_PKEY_keygen_init                    key          key          key          key          key          key          key          key          key          key          key
181                                      generation   generation   generation   generation   generation   generation   generation   generation   generation   generation   generation
182 EVP_PKEY_keygen                                                                                                                                                           key
183                                                                                                                                                                        generation
184 EVP_PKEY_gen                                                                                                                                              parameter       key
185                                                                                                                                                           generation   generation
186 EVP_PKEY_CTX_get_params                newed       digest       verify       verify       encrypt      decrypt      derive      encapsulate  decapsulate  parameter       key
187                                                     sign                     recover                                                                      generation   generation
188 EVP_PKEY_CTX_set_params                newed       digest       verify       verify       encrypt      decrypt      derive      encapsulate  decapsulate  parameter       key
189                                                     sign                     recover                                                                      generation   generation
190 EVP_PKEY_CTX_gettable_params           newed       digest       verify       verify       encrypt      decrypt      derive      encapsulate  decapsulate  parameter       key
191                                                     sign                     recover                                                                      generation   generation
192 EVP_PKEY_CTX_settable_params           newed       digest       verify       verify       encrypt      decrypt      derive      encapsulate  decapsulate  parameter       key
193                                                     sign                     recover                                                                      generation   generation
194 EVP_PKEY_CTX_free             freed    freed        freed        freed        freed        freed        freed        freed        freed        freed        freed        freed
195
196=end man
197
198=begin html
199
200<table style="border:1px solid; border-collapse:collapse">
201<tr><th style="border:1px solid" align="left">Function Call</th>
202    <th style="border:1px solid" colspan="13">Current State</th></tr>
203<tr><th style="border:1px solid"></th>
204    <th style="border:1px solid" align="center">start</th>
205    <th style="border:1px solid" align="center">newed</th>
206    <th style="border:1px solid" align="center">digest<br>sign</th>
207    <th style="border:1px solid" align="center">verify</th>
208    <th style="border:1px solid" align="center">verify<br>recover</th>
209    <th style="border:1px solid" align="center">encrypt</th>
210    <th style="border:1px solid" align="center">decrypt</th>
211    <th style="border:1px solid" align="center">derive</th>
212    <th style="border:1px solid" align="center">encapsulate</th>
213    <th style="border:1px solid" align="center">decapsulate</th>
214    <th style="border:1px solid" align="center">parameter<br>generation</th>
215    <th style="border:1px solid" align="center">key<br>generation</th>
216    <th style="border:1px solid" align="center">freed</th>
217</tr>
218
219<tr><th style="border:1px solid" align="left">EVP_PKEY_CTX_new</th>
220    <td style="border:1px solid" align="center">newed</td>
221    <td style="border:1px solid" align="center"></td>
222    <td style="border:1px solid" align="center"></td>
223    <td style="border:1px solid" align="center"></td>
224    <td style="border:1px solid" align="center"></td>
225    <td style="border:1px solid" align="center"></td>
226    <td style="border:1px solid" align="center"></td>
227    <td style="border:1px solid" align="center"></td>
228    <td style="border:1px solid" align="center"></td>
229    <td style="border:1px solid" align="center"></td>
230    <td style="border:1px solid" align="center"></td>
231    <td style="border:1px solid" align="center"></td>
232    <td style="border:1px solid" align="center"></td>
233</tr>
234<tr><th style="border:1px solid" align="left">EVP_PKEY_CTX_new_id</th>
235    <td style="border:1px solid" align="center">newed</td>
236    <td style="border:1px solid" align="center"></td>
237    <td style="border:1px solid" align="center"></td>
238    <td style="border:1px solid" align="center"></td>
239    <td style="border:1px solid" align="center"></td>
240    <td style="border:1px solid" align="center"></td>
241    <td style="border:1px solid" align="center"></td>
242    <td style="border:1px solid" align="center"></td>
243    <td style="border:1px solid" align="center"></td>
244    <td style="border:1px solid" align="center"></td>
245    <td style="border:1px solid" align="center"></td>
246    <td style="border:1px solid" align="center"></td>
247    <td style="border:1px solid" align="center"></td>
248</tr>
249<tr><th style="border:1px solid" align="left">EVP_PKEY_CTX_new_from_name</th>
250    <td style="border:1px solid" align="center">newed</td>
251    <td style="border:1px solid" align="center"></td>
252    <td style="border:1px solid" align="center"></td>
253    <td style="border:1px solid" align="center"></td>
254    <td style="border:1px solid" align="center"></td>
255    <td style="border:1px solid" align="center"></td>
256    <td style="border:1px solid" align="center"></td>
257    <td style="border:1px solid" align="center"></td>
258    <td style="border:1px solid" align="center"></td>
259    <td style="border:1px solid" align="center"></td>
260    <td style="border:1px solid" align="center"></td>
261    <td style="border:1px solid" align="center"></td>
262    <td style="border:1px solid" align="center"></td>
263</tr>
264<tr><th style="border:1px solid" align="left">EVP_PKEY_CTX_new_from_pkey</th>
265    <td style="border:1px solid" align="center">newed</td>
266    <td style="border:1px solid" align="center"></td>
267    <td style="border:1px solid" align="center"></td>
268    <td style="border:1px solid" align="center"></td>
269    <td style="border:1px solid" align="center"></td>
270    <td style="border:1px solid" align="center"></td>
271    <td style="border:1px solid" align="center"></td>
272    <td style="border:1px solid" align="center"></td>
273    <td style="border:1px solid" align="center"></td>
274    <td style="border:1px solid" align="center"></td>
275    <td style="border:1px solid" align="center"></td>
276    <td style="border:1px solid" align="center"></td>
277    <td style="border:1px solid" align="center"></td>
278</tr>
279<tr><th style="border:1px solid" align="left">EVP_PKEY_sign_init</th>
280    <td style="border:1px solid" align="center"></td>
281    <td style="border:1px solid" align="center">digest<br>sign</td>
282    <td style="border:1px solid" align="center">digest<br>sign</td>
283    <td style="border:1px solid" align="center">digest<br>sign</td>
284    <td style="border:1px solid" align="center">digest<br>sign</td>
285    <td style="border:1px solid" align="center">digest<br>sign</td>
286    <td style="border:1px solid" align="center">digest<br>sign</td>
287    <td style="border:1px solid" align="center">digest<br>sign</td>
288    <td style="border:1px solid" align="center">digest<br>sign</td>
289    <td style="border:1px solid" align="center">digest<br>sign</td>
290    <td style="border:1px solid" align="center">digest<br>sign</td>
291    <td style="border:1px solid" align="center">digest<br>sign</td>
292    <td style="border:1px solid" align="center"></td>
293</tr>
294<tr><th style="border:1px solid" align="left">EVP_PKEY_sign</th>
295    <td style="border:1px solid" align="center"></td>
296    <td style="border:1px solid" align="center"></td>
297    <td style="border:1px solid" align="center">digest<br>sign</td>
298    <td style="border:1px solid" align="center"></td>
299    <td style="border:1px solid" align="center"></td>
300    <td style="border:1px solid" align="center"></td>
301    <td style="border:1px solid" align="center"></td>
302    <td style="border:1px solid" align="center"></td>
303    <td style="border:1px solid" align="center"></td>
304    <td style="border:1px solid" align="center"></td>
305    <td style="border:1px solid" align="center"></td>
306    <td style="border:1px solid" align="center"></td>
307    <td style="border:1px solid" align="center"></td>
308</tr>
309<tr><th style="border:1px solid" align="left">EVP_PKEY_verify_init</th>
310    <td style="border:1px solid" align="center"></td>
311    <td style="border:1px solid" align="center">verify</td>
312    <td style="border:1px solid" align="center">verify</td>
313    <td style="border:1px solid" align="center">verify</td>
314    <td style="border:1px solid" align="center">verify</td>
315    <td style="border:1px solid" align="center">verify</td>
316    <td style="border:1px solid" align="center">verify</td>
317    <td style="border:1px solid" align="center">verify</td>
318    <td style="border:1px solid" align="center">verify</td>
319    <td style="border:1px solid" align="center">verify</td>
320    <td style="border:1px solid" align="center">verify</td>
321    <td style="border:1px solid" align="center">verify</td>
322    <td style="border:1px solid" align="center"></td>
323</tr>
324<tr><th style="border:1px solid" align="left">EVP_PKEY_verify</th>
325    <td style="border:1px solid" align="center"></td>
326    <td style="border:1px solid" align="center"></td>
327    <td style="border:1px solid" align="center"></td>
328    <td style="border:1px solid" align="center">verify</td>
329    <td style="border:1px solid" align="center"></td>
330    <td style="border:1px solid" align="center"></td>
331    <td style="border:1px solid" align="center"></td>
332    <td style="border:1px solid" align="center"></td>
333    <td style="border:1px solid" align="center"></td>
334    <td style="border:1px solid" align="center"></td>
335    <td style="border:1px solid" align="center"></td>
336    <td style="border:1px solid" align="center"></td>
337    <td style="border:1px solid" align="center"></td>
338</tr>
339<tr><th style="border:1px solid" align="left">EVP_PKEY_verify_recover_init</th>
340    <td style="border:1px solid" align="center"></td>
341    <td style="border:1px solid" align="center">verify<br>recover</td>
342    <td style="border:1px solid" align="center">verify<br>recover</td>
343    <td style="border:1px solid" align="center">verify<br>recover</td>
344    <td style="border:1px solid" align="center">verify<br>recover</td>
345    <td style="border:1px solid" align="center">verify<br>recover</td>
346    <td style="border:1px solid" align="center">verify<br>recover</td>
347    <td style="border:1px solid" align="center">verify<br>recover</td>
348    <td style="border:1px solid" align="center">verify<br>recover</td>
349    <td style="border:1px solid" align="center">verify<br>recover</td>
350    <td style="border:1px solid" align="center">verify<br>recover</td>
351    <td style="border:1px solid" align="center">verify<br>recover</td>
352    <td style="border:1px solid" align="center"></td>
353</tr>
354<tr><th style="border:1px solid" align="left">EVP_PKEY_verify_recover</th>
355    <td style="border:1px solid" align="center"></td>
356    <td style="border:1px solid" align="center"></td>
357    <td style="border:1px solid" align="center"></td>
358    <td style="border:1px solid" align="center"></td>
359    <td style="border:1px solid" align="center">verify<br>recover</td>
360    <td style="border:1px solid" align="center"></td>
361    <td style="border:1px solid" align="center"></td>
362    <td style="border:1px solid" align="center"></td>
363    <td style="border:1px solid" align="center"></td>
364    <td style="border:1px solid" align="center"></td>
365    <td style="border:1px solid" align="center"></td>
366    <td style="border:1px solid" align="center"></td>
367    <td style="border:1px solid" align="center"></td>
368</tr>
369<tr><th style="border:1px solid" align="left">EVP_PKEY_encrypt_init</th>
370    <td style="border:1px solid" align="center"></td>
371    <td style="border:1px solid" align="center">encrypt</td>
372    <td style="border:1px solid" align="center">encrypt</td>
373    <td style="border:1px solid" align="center">encrypt</td>
374    <td style="border:1px solid" align="center">encrypt</td>
375    <td style="border:1px solid" align="center">encrypt</td>
376    <td style="border:1px solid" align="center">encrypt</td>
377    <td style="border:1px solid" align="center">encrypt</td>
378    <td style="border:1px solid" align="center">encrypt</td>
379    <td style="border:1px solid" align="center">encrypt</td>
380    <td style="border:1px solid" align="center">encrypt</td>
381    <td style="border:1px solid" align="center">encrypt</td>
382    <td style="border:1px solid" align="center"></td>
383</tr>
384<tr><th style="border:1px solid" align="left">EVP_PKEY_encrypt</th>
385    <td style="border:1px solid" align="center"></td>
386    <td style="border:1px solid" align="center"></td>
387    <td style="border:1px solid" align="center"></td>
388    <td style="border:1px solid" align="center"></td>
389    <td style="border:1px solid" align="center"></td>
390    <td style="border:1px solid" align="center">encrypt</td>
391    <td style="border:1px solid" align="center"></td>
392    <td style="border:1px solid" align="center"></td>
393    <td style="border:1px solid" align="center"></td>
394    <td style="border:1px solid" align="center"></td>
395    <td style="border:1px solid" align="center"></td>
396    <td style="border:1px solid" align="center"></td>
397    <td style="border:1px solid" align="center"></td>
398</tr>
399<tr><th style="border:1px solid" align="left">EVP_PKEY_decrypt_init</th>
400    <td style="border:1px solid" align="center"></td>
401    <td style="border:1px solid" align="center">decrypt</td>
402    <td style="border:1px solid" align="center">decrypt</td>
403    <td style="border:1px solid" align="center">decrypt</td>
404    <td style="border:1px solid" align="center">decrypt</td>
405    <td style="border:1px solid" align="center">decrypt</td>
406    <td style="border:1px solid" align="center">decrypt</td>
407    <td style="border:1px solid" align="center">decrypt</td>
408    <td style="border:1px solid" align="center">decrypt</td>
409    <td style="border:1px solid" align="center">decrypt</td>
410    <td style="border:1px solid" align="center">decrypt</td>
411    <td style="border:1px solid" align="center">decrypt</td>
412    <td style="border:1px solid" align="center"></td>
413</tr>
414<tr><th style="border:1px solid" align="left">EVP_PKEY_decrypt</th>
415    <td style="border:1px solid" align="center"></td>
416    <td style="border:1px solid" align="center"></td>
417    <td style="border:1px solid" align="center"></td>
418    <td style="border:1px solid" align="center"></td>
419    <td style="border:1px solid" align="center"></td>
420    <td style="border:1px solid" align="center"></td>
421    <td style="border:1px solid" align="center">decrypt</td>
422    <td style="border:1px solid" align="center"></td>
423    <td style="border:1px solid" align="center"></td>
424    <td style="border:1px solid" align="center"></td>
425    <td style="border:1px solid" align="center"></td>
426    <td style="border:1px solid" align="center"></td>
427    <td style="border:1px solid" align="center"></td>
428</tr>
429<tr><th style="border:1px solid" align="left">EVP_PKEY_derive_init</th>
430    <td style="border:1px solid" align="center"></td>
431    <td style="border:1px solid" align="center">derive</td>
432    <td style="border:1px solid" align="center">derive</td>
433    <td style="border:1px solid" align="center">derive</td>
434    <td style="border:1px solid" align="center">derive</td>
435    <td style="border:1px solid" align="center">derive</td>
436    <td style="border:1px solid" align="center">derive</td>
437    <td style="border:1px solid" align="center">derive</td>
438    <td style="border:1px solid" align="center">derive</td>
439    <td style="border:1px solid" align="center">derive</td>
440    <td style="border:1px solid" align="center">derive</td>
441    <td style="border:1px solid" align="center">derive</td>
442    <td style="border:1px solid" align="center"></td>
443</tr>
444<tr><th style="border:1px solid" align="left">EVP_PKEY_derive_set_peer</th>
445    <td style="border:1px solid" align="center"></td>
446    <td style="border:1px solid" align="center"></td>
447    <td style="border:1px solid" align="center"></td>
448    <td style="border:1px solid" align="center"></td>
449    <td style="border:1px solid" align="center"></td>
450    <td style="border:1px solid" align="center"></td>
451    <td style="border:1px solid" align="center"></td>
452    <td style="border:1px solid" align="center">derive</td>
453    <td style="border:1px solid" align="center"></td>
454    <td style="border:1px solid" align="center"></td>
455    <td style="border:1px solid" align="center"></td>
456    <td style="border:1px solid" align="center"></td>
457    <td style="border:1px solid" align="center"></td>
458</tr>
459<tr><th style="border:1px solid" align="left">EVP_PKEY_derive</th>
460    <td style="border:1px solid" align="center"></td>
461    <td style="border:1px solid" align="center"></td>
462    <td style="border:1px solid" align="center"></td>
463    <td style="border:1px solid" align="center"></td>
464    <td style="border:1px solid" align="center"></td>
465    <td style="border:1px solid" align="center"></td>
466    <td style="border:1px solid" align="center"></td>
467    <td style="border:1px solid" align="center">derive</td>
468    <td style="border:1px solid" align="center"></td>
469    <td style="border:1px solid" align="center"></td>
470    <td style="border:1px solid" align="center"></td>
471    <td style="border:1px solid" align="center"></td>
472    <td style="border:1px solid" align="center"></td>
473</tr>
474<tr><th style="border:1px solid" align="left">EVP_PKEY_encapsulate_init</th>
475    <td style="border:1px solid" align="center"></td>
476    <td style="border:1px solid" align="center">encapsulate</td>
477    <td style="border:1px solid" align="center">encapsulate</td>
478    <td style="border:1px solid" align="center">encapsulate</td>
479    <td style="border:1px solid" align="center">encapsulate</td>
480    <td style="border:1px solid" align="center">encapsulate</td>
481    <td style="border:1px solid" align="center">encapsulate</td>
482    <td style="border:1px solid" align="center">encapsulate</td>
483    <td style="border:1px solid" align="center">encapsulate</td>
484    <td style="border:1px solid" align="center">encapsulate</td>
485    <td style="border:1px solid" align="center">encapsulate</td>
486    <td style="border:1px solid" align="center">encapsulate</td>
487    <td style="border:1px solid" align="center"></td>
488</tr>
489<tr><th style="border:1px solid" align="left">EVP_PKEY_encapsulate</th>
490    <td style="border:1px solid" align="center"></td>
491    <td style="border:1px solid" align="center"></td>
492    <td style="border:1px solid" align="center"></td>
493    <td style="border:1px solid" align="center"></td>
494    <td style="border:1px solid" align="center"></td>
495    <td style="border:1px solid" align="center"></td>
496    <td style="border:1px solid" align="center"></td>
497    <td style="border:1px solid" align="center"></td>
498    <td style="border:1px solid" align="center">encapsulate</td>
499    <td style="border:1px solid" align="center"></td>
500    <td style="border:1px solid" align="center"></td>
501    <td style="border:1px solid" align="center"></td>
502    <td style="border:1px solid" align="center"></td>
503</tr>
504<tr><th style="border:1px solid" align="left">EVP_PKEY_decapsulate_init</th>
505    <td style="border:1px solid" align="center"></td>
506    <td style="border:1px solid" align="center">decapsulate</td>
507    <td style="border:1px solid" align="center">decapsulate</td>
508    <td style="border:1px solid" align="center">decapsulate</td>
509    <td style="border:1px solid" align="center">decapsulate</td>
510    <td style="border:1px solid" align="center">decapsulate</td>
511    <td style="border:1px solid" align="center">decapsulate</td>
512    <td style="border:1px solid" align="center">decapsulate</td>
513    <td style="border:1px solid" align="center">decapsulate</td>
514    <td style="border:1px solid" align="center">decapsulate</td>
515    <td style="border:1px solid" align="center">decapsulate</td>
516    <td style="border:1px solid" align="center">decapsulate</td>
517    <td style="border:1px solid" align="center"></td>
518</tr>
519<tr><th style="border:1px solid" align="left">EVP_PKEY_decapsulate</th>
520    <td style="border:1px solid" align="center"></td>
521    <td style="border:1px solid" align="center"></td>
522    <td style="border:1px solid" align="center"></td>
523    <td style="border:1px solid" align="center"></td>
524    <td style="border:1px solid" align="center"></td>
525    <td style="border:1px solid" align="center"></td>
526    <td style="border:1px solid" align="center"></td>
527    <td style="border:1px solid" align="center"></td>
528    <td style="border:1px solid" align="center"></td>
529    <td style="border:1px solid" align="center">decapsulate</td>
530    <td style="border:1px solid" align="center"></td>
531    <td style="border:1px solid" align="center"></td>
532    <td style="border:1px solid" align="center"></td>
533</tr>
534<tr><th style="border:1px solid" align="left">EVP_PKEY_paramgen_init</th>
535    <td style="border:1px solid" align="center"></td>
536    <td style="border:1px solid" align="center">parameter<br>generation</td>
537    <td style="border:1px solid" align="center">parameter<br>generation</td>
538    <td style="border:1px solid" align="center">parameter<br>generation</td>
539    <td style="border:1px solid" align="center">parameter<br>generation</td>
540    <td style="border:1px solid" align="center">parameter<br>generation</td>
541    <td style="border:1px solid" align="center">parameter<br>generation</td>
542    <td style="border:1px solid" align="center">parameter<br>generation</td>
543    <td style="border:1px solid" align="center">parameter<br>generation</td>
544    <td style="border:1px solid" align="center">parameter<br>generation</td>
545    <td style="border:1px solid" align="center">parameter<br>generation</td>
546    <td style="border:1px solid" align="center">parameter<br>generation</td>
547    <td style="border:1px solid" align="center"></td>
548</tr>
549<tr><th style="border:1px solid" align="left">EVP_PKEY_paramgen</th>
550    <td style="border:1px solid" align="center"></td>
551    <td style="border:1px solid" align="center"></td>
552    <td style="border:1px solid" align="center"></td>
553    <td style="border:1px solid" align="center"></td>
554    <td style="border:1px solid" align="center"></td>
555    <td style="border:1px solid" align="center"></td>
556    <td style="border:1px solid" align="center"></td>
557    <td style="border:1px solid" align="center"></td>
558    <td style="border:1px solid" align="center"></td>
559    <td style="border:1px solid" align="center"></td>
560    <td style="border:1px solid" align="center">parameter<br>generation</td>
561    <td style="border:1px solid" align="center"></td>
562    <td style="border:1px solid" align="center"></td>
563</tr>
564<tr><th style="border:1px solid" align="left">EVP_PKEY_keygen_init</th>
565    <td style="border:1px solid" align="center"></td>
566    <td style="border:1px solid" align="center">key<br>generation</td>
567    <td style="border:1px solid" align="center">key<br>generation</td>
568    <td style="border:1px solid" align="center">key<br>generation</td>
569    <td style="border:1px solid" align="center">key<br>generation</td>
570    <td style="border:1px solid" align="center">key<br>generation</td>
571    <td style="border:1px solid" align="center">key<br>generation</td>
572    <td style="border:1px solid" align="center">key<br>generation</td>
573    <td style="border:1px solid" align="center">key<br>generation</td>
574    <td style="border:1px solid" align="center">key<br>generation</td>
575    <td style="border:1px solid" align="center">key<br>generation</td>
576    <td style="border:1px solid" align="center">key<br>generation</td>
577    <td style="border:1px solid" align="center"></td>
578</tr>
579<tr><th style="border:1px solid" align="left">EVP_PKEY_keygen</th>
580    <td style="border:1px solid" align="center"></td>
581    <td style="border:1px solid" align="center"></td>
582    <td style="border:1px solid" align="center"></td>
583    <td style="border:1px solid" align="center"></td>
584    <td style="border:1px solid" align="center"></td>
585    <td style="border:1px solid" align="center"></td>
586    <td style="border:1px solid" align="center"></td>
587    <td style="border:1px solid" align="center"></td>
588    <td style="border:1px solid" align="center"></td>
589    <td style="border:1px solid" align="center"></td>
590    <td style="border:1px solid" align="center"></td>
591    <td style="border:1px solid" align="center">key<br>generation</td>
592    <td style="border:1px solid" align="center"></td>
593</tr>
594<tr><th style="border:1px solid" align="left">EVP_PKEY_gen</th>
595    <td style="border:1px solid" align="center"></td>
596    <td style="border:1px solid" align="center"></td>
597    <td style="border:1px solid" align="center"></td>
598    <td style="border:1px solid" align="center"></td>
599    <td style="border:1px solid" align="center"></td>
600    <td style="border:1px solid" align="center"></td>
601    <td style="border:1px solid" align="center"></td>
602    <td style="border:1px solid" align="center"></td>
603    <td style="border:1px solid" align="center"></td>
604    <td style="border:1px solid" align="center"></td>
605    <td style="border:1px solid" align="center">parameter<br>generation</td>
606    <td style="border:1px solid" align="center">key<br>generation</td>
607    <td style="border:1px solid" align="center"></td>
608</tr>
609<tr><th style="border:1px solid" align="left">EVP_PKEY_CTX_get_params</th>
610    <td style="border:1px solid" align="center"></td>
611    <td style="border:1px solid" align="center">newed</td>
612    <td style="border:1px solid" align="center">digest<br>sign</td>
613    <td style="border:1px solid" align="center">verify</td>
614    <td style="border:1px solid" align="center">verify<br>recover</td>
615    <td style="border:1px solid" align="center">encrypt</td>
616    <td style="border:1px solid" align="center">decrypt</td>
617    <td style="border:1px solid" align="center">derive</td>
618    <td style="border:1px solid" align="center">encapsulate</td>
619    <td style="border:1px solid" align="center">decapsulate</td>
620    <td style="border:1px solid" align="center">parameter<br>generation</td>
621    <td style="border:1px solid" align="center">key<br>generation</td>
622    <td style="border:1px solid" align="center"></td>
623</tr>
624<tr><th style="border:1px solid" align="left">EVP_PKEY_CTX_set_params</th>
625    <td style="border:1px solid" align="center"></td>
626    <td style="border:1px solid" align="center">newed</td>
627    <td style="border:1px solid" align="center">digest<br>sign</td>
628    <td style="border:1px solid" align="center">verify</td>
629    <td style="border:1px solid" align="center">verify<br>recover</td>
630    <td style="border:1px solid" align="center">encrypt</td>
631    <td style="border:1px solid" align="center">decrypt</td>
632    <td style="border:1px solid" align="center">derive</td>
633    <td style="border:1px solid" align="center">encapsulate</td>
634    <td style="border:1px solid" align="center">decapsulate</td>
635    <td style="border:1px solid" align="center">parameter<br>generation</td>
636    <td style="border:1px solid" align="center">key<br>generation</td>
637    <td style="border:1px solid" align="center"></td>
638</tr>
639<tr><th style="border:1px solid" align="left">EVP_PKEY_CTX_gettable_params</th>
640    <td style="border:1px solid" align="center"></td>
641    <td style="border:1px solid" align="center">newed</td>
642    <td style="border:1px solid" align="center">digest<br>sign</td>
643    <td style="border:1px solid" align="center">verify</td>
644    <td style="border:1px solid" align="center">verify<br>recover</td>
645    <td style="border:1px solid" align="center">encrypt</td>
646    <td style="border:1px solid" align="center">decrypt</td>
647    <td style="border:1px solid" align="center">derive</td>
648    <td style="border:1px solid" align="center">encapsulate</td>
649    <td style="border:1px solid" align="center">decapsulate</td>
650    <td style="border:1px solid" align="center">parameter<br>generation</td>
651    <td style="border:1px solid" align="center">key<br>generation</td>
652    <td style="border:1px solid" align="center"></td>
653</tr>
654<tr><th style="border:1px solid" align="left">EVP_PKEY_CTX_settable_params</th>
655    <td style="border:1px solid" align="center"></td>
656    <td style="border:1px solid" align="center">newed</td>
657    <td style="border:1px solid" align="center">digest<br>sign</td>
658    <td style="border:1px solid" align="center">verify</td>
659    <td style="border:1px solid" align="center">verify<br>recover</td>
660    <td style="border:1px solid" align="center">encrypt</td>
661    <td style="border:1px solid" align="center">decrypt</td>
662    <td style="border:1px solid" align="center">derive</td>
663    <td style="border:1px solid" align="center">encapsulate</td>
664    <td style="border:1px solid" align="center">decapsulate</td>
665    <td style="border:1px solid" align="center">parameter<br>generation</td>
666    <td style="border:1px solid" align="center">key<br>generation</td>
667    <td style="border:1px solid" align="center"></td>
668</tr>
669<tr><th style="border:1px solid" align="left">EVP_PKEY_CTX_free</th>
670    <td style="border:1px solid" align="center">freed</td>
671    <td style="border:1px solid" align="center">freed</td>
672    <td style="border:1px solid" align="center">freed</td>
673    <td style="border:1px solid" align="center">freed</td>
674    <td style="border:1px solid" align="center">freed</td>
675    <td style="border:1px solid" align="center">freed</td>
676    <td style="border:1px solid" align="center">freed</td>
677    <td style="border:1px solid" align="center">freed</td>
678    <td style="border:1px solid" align="center">freed</td>
679    <td style="border:1px solid" align="center">freed</td>
680    <td style="border:1px solid" align="center">freed</td>
681    <td style="border:1px solid" align="center">freed</td>
682    <td style="border:1px solid" align="center"></td>
683</tr>
684</table>
685
686=end html
687
688=head1 NOTES
689
690At some point the EVP layer will begin enforcing the transitions described
691herein.
692
693=head1 SEE ALSO
694
695L<EVP_PKEY_new(3)>,
696L<EVP_PKEY_decapsulate(3)>, L<EVP_PKEY_decrypt(3)>, L<EVP_PKEY_encapsulate(3)>,
697L<EVP_PKEY_encrypt(3)>, L<EVP_PKEY_derive(3)>, L<EVP_PKEY_keygen(3)>,
698L<EVP_PKEY_sign(3)>, L<EVP_PKEY_verify(3)>, L<EVP_PKEY_verify_recover(3)>
699
700=head1 HISTORY
701
702The provider PKEY interface was introduced in OpenSSL 3.0.
703
704=head1 COPYRIGHT
705
706Copyright 2021-2022 The OpenSSL Project Authors. All Rights Reserved.
707
708Licensed under the Apache License 2.0 (the "License").  You may not use
709this file except in compliance with the License.  You can obtain a copy
710in the file LICENSE in the source distribution or at
711L<https://www.openssl.org/source/license.html>.
712
713=cut
714