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openssl/doc/man7/life_cycle-pkey.pod
Pauli 95c8a51252 doc: add PKEY life cycle documentation 
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/15637)
2021-06-08 18:59:25 +10:00

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=pod
=head1 NAME
life_cycle-pkey - The PKEY algorithm life-cycle
=head1 DESCRIPTION
All public keys (PKEYs) go through a number of stages in their life-cycle:
=over 4
=item start
This state represents the PKEY before it has been allocated. It is the
starting state for any life-cycle transitions.
=item newed
This state represents the PKEY after it has been allocated.
=item decapsulate
This state represents the PKEY when it is ready to perform a private key decapsulation
opeartion.
=item decrypt
This state represents the PKEY when it is ready to decrypt some ciphertext.
=item derive
This state represents the PKEY when it is ready to derive a shared secret.
=item digest sign
This state represents the PKEY when it is ready to perform a private key signature
operation.
=item encapsulate
This state represents the PKEY when it is ready to perform a public key encapsulation
opeartion.
=item encrypt
This state represents the PKEY when it is ready to encrypt some plaintext.
=item key generation
This state represents the PKEY when it is ready to generate a new public/private key.
=item parameter generation
This state represents the PKEY when it is ready to generate key parameters.
=item verify
This state represents the PKEY when it is ready to verify a public key signature.
=item verify recover
This state represents the PKEY when it is ready to recover a public key signature data.
=item freed
This state is entered when the PKEY is freed. It is the terminal state
for all life-cycle transitions.
=back
=head2 State Transition Diagram
The usual life-cycle of a PKEY object is illustrated:
=begin man
+-------------+
| |
| start |
| |
EVP_PKEY_derive +-------------+
+-------------+ EVP_PKEY_derive_set_peer | +-------------+
| |----------------------------+ | +----------------------------| |
| derive | | | | EVP_PKEY_verify | verify |
| |<---------------------------+ | +--------------------------->| |
+-------------+ | +-------------+
^ | ^
| EVP_PKEY_derive_init | EVP_PKEY_verify_init |
+---------------------------------------+ | +---------------------------------------+
| | |
+-------------+ | | | +-------------+
| |----------------------------+ | | | +----------------------------| |
| digest sign | EVP_PKEY_sign | | | | | EVP_PKEY_verify_recover | verify |
| |<---------------------------+ | | | +--------------------------->| recover |
+-------------+ | | | +-------------+
^ | | | ^
| EVP_PKEY_sign_init | | | EVP_PKEY_verify_recover_init |
+---------------------------------+ | | | +---------------------------------+
| | | | |
+-------------+ | | | | | +-------------+
| |----------------------------+ | | | | | +----------------------------| |
| decapsulate | EVP_PKEY_decapsulate | | | | | | | EVP_PKEY_decrypt | decrypt |
| |<---------------------------+ | | v | | +--------------------------->| |
+-------------+ | +-------------+ | +-------------+
^ +---| |---+ ^
| EVP_PKEY_decapsulate_init | | EVP_PKEY_decrypt_init |
+-------------------------------------| newed |-------------------------------------+
| |
+---| |---+
+-------------+ | +-------------+ | +-------------+
| |----------------------------+ | | | | +----------------------------| |
| encapsulate | EVP_PKEY_encapsulate | | | | | | EVP_PKEY_encrypt | encrypt |
| |<---------------------------+ | | | | +--------------------------->| |
+-------------+ | | | | +-------------+
^ | | | | ^
| EVP_PKEY_encapsulate_init | | | | EVP_PKEY_encrypt_init |
+---------------------------------+ | | +---------------------------------+
| |
+---------------------------------------+ +---------------------------------------+
| EVP_PKEY_paramgen_init EVP_PKEY_keygen_init |
v v
+-------------+ +-------------+
| |----------------------------+ +----------------------------| |
| parameter | | | | key |
| generation |<---------------------------+ +--------------------------->| generation |
+-------------+ EVP_PKEY_paramgen EVP_PKEY_keygen +-------------+
EVP_PKEY_gen EVP_PKEY_gen
+ - - - - - + +-----------+
' ' EVP_PKEY_CTX_free | |
' any state '------------------->| freed |
' ' | |
+ - - - - - + +-----------+
=end man
=for html <img src="img/pkey.png">
=head2 Formal State Transitions
This section defines all of the legal state transitions.
This is the canonical list.
=begin man
Function Call ---------------------------------------------------------------------- Current State ----------------------------------------------------------------------
start newed digest verify verify encrypt decrypt derive encapsulate decapsulate parameter key freed
sign recover generation generation
EVP_PKEY_CTX_new newed
EVP_PKEY_CTX_new_id newed
EVP_PKEY_CTX_new_from_name newed
EVP_PKEY_CTX_new_from_pkey newed
EVP_PKEY_sign_init digest digest digest digest digest digest digest digest digest digest digest
sign sign sign sign sign sign sign sign sign sign sign
EVP_PKEY_sign digest
sign
EVP_PKEY_verify_init verify verify verify verify verify verify verify verify verify verify verify
EVP_PKEY_verify verify
EVP_PKEY_verify_recover_init verify verify verify verify verify verify verify verify verify verify verify
recover recover recover recover recover recover recover recover recover recover recover
EVP_PKEY_verify_recover verify
recover
EVP_PKEY_encrypt_init encrypt encrypt encrypt encrypt encrypt encrypt encrypt encrypt encrypt encrypt encrypt
EVP_PKEY_encrypt encrypt
EVP_PKEY_decrypt_init decrypt decrypt decrypt decrypt decrypt decrypt decrypt decrypt decrypt decrypt decrypt
EVP_PKEY_decrypt decrypt
EVP_PKEY_derive_init derive derive derive derive derive derive derive derive derive derive derive
EVP_PKEY_derive_set_peer derive
EVP_PKEY_derive derive
EVP_PKEY_encapsulate_init encapsulate encapsulate encapsulate encapsulate encapsulate encapsulate encapsulate encapsulate encapsulate encapsulate encapsulate
EVP_PKEY_encapsulate encapsulate
EVP_PKEY_decapsulate_init decapsulate decapsulate decapsulate decapsulate decapsulate decapsulate decapsulate decapsulate decapsulate decapsulate decapsulate
EVP_PKEY_decapsulate decapsulate
EVP_PKEY_paramgen_init parameter parameter parameter parameter parameter parameter parameter parameter parameter parameter parameter
generation generation generation generation generation generation generation generation generation generation generation
EVP_PKEY_paramgen parameter
generation
EVP_PKEY_keygen_init key key key key key key key key key key key
generation generation generation generation generation generation generation generation generation generation generation
EVP_PKEY_keygen key
generation
EVP_PKEY_gen parameter key
generation generation
EVP_PKEY_CTX_get_params newed digest verify verify encrypt decrypt derive encapsulate decapsulate parameter key
sign recover generation generation
EVP_PKEY_CTX_set_params newed digest verify verify encrypt decrypt derive encapsulate decapsulate parameter key
sign recover generation generation
EVP_PKEY_CTX_gettable_params newed digest verify verify encrypt decrypt derive encapsulate decapsulate parameter key
sign recover generation generation
EVP_PKEY_CTX_settable_params newed digest verify verify encrypt decrypt derive encapsulate decapsulate parameter key
sign recover generation generation
EVP_PKEY_CTX_free freed freed freed freed freed freed freed freed freed freed freed freed
=end man
=begin html
<table style="border:1px solid; border-collapse:collapse">
<tr><th style="border:1px solid" align="left">Function Call</th>
<th style="border:1px solid" colspan="13">Current State</th></tr>
<tr><th style="border:1px solid"></th>
<th style="border:1px solid" align="center">start</th>
<th style="border:1px solid" align="center">newed</th>
<th style="border:1px solid" align="center">digest<br>sign</th>
<th style="border:1px solid" align="center">verify</th>
<th style="border:1px solid" align="center">verify<br>recover</th>
<th style="border:1px solid" align="center">encrypt</th>
<th style="border:1px solid" align="center">decrypt</th>
<th style="border:1px solid" align="center">derive</th>
<th style="border:1px solid" align="center">encapsulate</th>
<th style="border:1px solid" align="center">decapsulate</th>
<th style="border:1px solid" align="center">parameter<br>generation</th>
<th style="border:1px solid" align="center">key<br>generation</th>
<th style="border:1px solid" align="center">freed</th>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_CTX_new</th>
<td style="border:1px solid" align="center">newed</td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_CTX_new_id</th>
<td style="border:1px solid" align="center">newed</td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_CTX_new_from_name</th>
<td style="border:1px solid" align="center">newed</td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_CTX_new_from_pkey</th>
<td style="border:1px solid" align="center">newed</td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_sign_init</th>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center">digest<br>sign</td>
<td style="border:1px solid" align="center">digest<br>sign</td>
<td style="border:1px solid" align="center">digest<br>sign</td>
<td style="border:1px solid" align="center">digest<br>sign</td>
<td style="border:1px solid" align="center">digest<br>sign</td>
<td style="border:1px solid" align="center">digest<br>sign</td>
<td style="border:1px solid" align="center">digest<br>sign</td>
<td style="border:1px solid" align="center">digest<br>sign</td>
<td style="border:1px solid" align="center">digest<br>sign</td>
<td style="border:1px solid" align="center">digest<br>sign</td>
<td style="border:1px solid" align="center">digest<br>sign</td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_sign</th>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center">digest<br>sign</td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_verify_init</th>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center">verify</td>
<td style="border:1px solid" align="center">verify</td>
<td style="border:1px solid" align="center">verify</td>
<td style="border:1px solid" align="center">verify</td>
<td style="border:1px solid" align="center">verify</td>
<td style="border:1px solid" align="center">verify</td>
<td style="border:1px solid" align="center">verify</td>
<td style="border:1px solid" align="center">verify</td>
<td style="border:1px solid" align="center">verify</td>
<td style="border:1px solid" align="center">verify</td>
<td style="border:1px solid" align="center">verify</td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_verify</th>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center">verify</td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_verify_recover_init</th>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center">verify<br>recover</td>
<td style="border:1px solid" align="center">verify<br>recover</td>
<td style="border:1px solid" align="center">verify<br>recover</td>
<td style="border:1px solid" align="center">verify<br>recover</td>
<td style="border:1px solid" align="center">verify<br>recover</td>
<td style="border:1px solid" align="center">verify<br>recover</td>
<td style="border:1px solid" align="center">verify<br>recover</td>
<td style="border:1px solid" align="center">verify<br>recover</td>
<td style="border:1px solid" align="center">verify<br>recover</td>
<td style="border:1px solid" align="center">verify<br>recover</td>
<td style="border:1px solid" align="center">verify<br>recover</td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_verify_recover</th>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center">verify<br>recover</td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_encrypt_init</th>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center">encrypt</td>
<td style="border:1px solid" align="center">encrypt</td>
<td style="border:1px solid" align="center">encrypt</td>
<td style="border:1px solid" align="center">encrypt</td>
<td style="border:1px solid" align="center">encrypt</td>
<td style="border:1px solid" align="center">encrypt</td>
<td style="border:1px solid" align="center">encrypt</td>
<td style="border:1px solid" align="center">encrypt</td>
<td style="border:1px solid" align="center">encrypt</td>
<td style="border:1px solid" align="center">encrypt</td>
<td style="border:1px solid" align="center">encrypt</td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_encrypt</th>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center">encrypt</td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_decrypt_init</th>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center">decrypt</td>
<td style="border:1px solid" align="center">decrypt</td>
<td style="border:1px solid" align="center">decrypt</td>
<td style="border:1px solid" align="center">decrypt</td>
<td style="border:1px solid" align="center">decrypt</td>
<td style="border:1px solid" align="center">decrypt</td>
<td style="border:1px solid" align="center">decrypt</td>
<td style="border:1px solid" align="center">decrypt</td>
<td style="border:1px solid" align="center">decrypt</td>
<td style="border:1px solid" align="center">decrypt</td>
<td style="border:1px solid" align="center">decrypt</td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_decrypt</th>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center">decrypt</td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_derive_init</th>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center">derive</td>
<td style="border:1px solid" align="center">derive</td>
<td style="border:1px solid" align="center">derive</td>
<td style="border:1px solid" align="center">derive</td>
<td style="border:1px solid" align="center">derive</td>
<td style="border:1px solid" align="center">derive</td>
<td style="border:1px solid" align="center">derive</td>
<td style="border:1px solid" align="center">derive</td>
<td style="border:1px solid" align="center">derive</td>
<td style="border:1px solid" align="center">derive</td>
<td style="border:1px solid" align="center">derive</td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_derive_set_peer</th>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center">derive</td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_derive</th>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center">derive</td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_encapsulate_init</th>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center">encapsulate</td>
<td style="border:1px solid" align="center">encapsulate</td>
<td style="border:1px solid" align="center">encapsulate</td>
<td style="border:1px solid" align="center">encapsulate</td>
<td style="border:1px solid" align="center">encapsulate</td>
<td style="border:1px solid" align="center">encapsulate</td>
<td style="border:1px solid" align="center">encapsulate</td>
<td style="border:1px solid" align="center">encapsulate</td>
<td style="border:1px solid" align="center">encapsulate</td>
<td style="border:1px solid" align="center">encapsulate</td>
<td style="border:1px solid" align="center">encapsulate</td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_encapsulate</th>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center">encapsulate</td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_decapsulate_init</th>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center">decapsulate</td>
<td style="border:1px solid" align="center">decapsulate</td>
<td style="border:1px solid" align="center">decapsulate</td>
<td style="border:1px solid" align="center">decapsulate</td>
<td style="border:1px solid" align="center">decapsulate</td>
<td style="border:1px solid" align="center">decapsulate</td>
<td style="border:1px solid" align="center">decapsulate</td>
<td style="border:1px solid" align="center">decapsulate</td>
<td style="border:1px solid" align="center">decapsulate</td>
<td style="border:1px solid" align="center">decapsulate</td>
<td style="border:1px solid" align="center">decapsulate</td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_decapsulate</th>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center">decapsulate</td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_paramgen_init</th>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center">parameter<br>generation</td>
<td style="border:1px solid" align="center">parameter<br>generation</td>
<td style="border:1px solid" align="center">parameter<br>generation</td>
<td style="border:1px solid" align="center">parameter<br>generation</td>
<td style="border:1px solid" align="center">parameter<br>generation</td>
<td style="border:1px solid" align="center">parameter<br>generation</td>
<td style="border:1px solid" align="center">parameter<br>generation</td>
<td style="border:1px solid" align="center">parameter<br>generation</td>
<td style="border:1px solid" align="center">parameter<br>generation</td>
<td style="border:1px solid" align="center">parameter<br>generation</td>
<td style="border:1px solid" align="center">parameter<br>generation</td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_paramgen</th>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center">parameter<br>generation</td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_keygen_init</th>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center">key<br>generation</td>
<td style="border:1px solid" align="center">key<br>generation</td>
<td style="border:1px solid" align="center">key<br>generation</td>
<td style="border:1px solid" align="center">key<br>generation</td>
<td style="border:1px solid" align="center">key<br>generation</td>
<td style="border:1px solid" align="center">key<br>generation</td>
<td style="border:1px solid" align="center">key<br>generation</td>
<td style="border:1px solid" align="center">key<br>generation</td>
<td style="border:1px solid" align="center">key<br>generation</td>
<td style="border:1px solid" align="center">key<br>generation</td>
<td style="border:1px solid" align="center">key<br>generation</td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_keygen</th>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center">key<br>generation</td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_gen</th>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center">parameter<br>generation</td>
<td style="border:1px solid" align="center">key<br>generation</td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_CTX_get_params</th>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center">newed</td>
<td style="border:1px solid" align="center">digest<br>sign</td>
<td style="border:1px solid" align="center">verify</td>
<td style="border:1px solid" align="center">verify<br>recover</td>
<td style="border:1px solid" align="center">encrypt</td>
<td style="border:1px solid" align="center">decrypt</td>
<td style="border:1px solid" align="center">derive</td>
<td style="border:1px solid" align="center">encapsulate</td>
<td style="border:1px solid" align="center">decapsulate</td>
<td style="border:1px solid" align="center">parameter<br>generation</td>
<td style="border:1px solid" align="center">key<br>generation</td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_CTX_set_params</th>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center">newed</td>
<td style="border:1px solid" align="center">digest<br>sign</td>
<td style="border:1px solid" align="center">verify</td>
<td style="border:1px solid" align="center">verify<br>recover</td>
<td style="border:1px solid" align="center">encrypt</td>
<td style="border:1px solid" align="center">decrypt</td>
<td style="border:1px solid" align="center">derive</td>
<td style="border:1px solid" align="center">encapsulate</td>
<td style="border:1px solid" align="center">decapsulate</td>
<td style="border:1px solid" align="center">parameter<br>generation</td>
<td style="border:1px solid" align="center">key<br>generation</td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_CTX_gettable_params</th>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center">newed</td>
<td style="border:1px solid" align="center">digest<br>sign</td>
<td style="border:1px solid" align="center">verify</td>
<td style="border:1px solid" align="center">verify<br>recover</td>
<td style="border:1px solid" align="center">encrypt</td>
<td style="border:1px solid" align="center">decrypt</td>
<td style="border:1px solid" align="center">derive</td>
<td style="border:1px solid" align="center">encapsulate</td>
<td style="border:1px solid" align="center">decapsulate</td>
<td style="border:1px solid" align="center">parameter<br>generation</td>
<td style="border:1px solid" align="center">key<br>generation</td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_CTX_settable_params</th>
<td style="border:1px solid" align="center"></td>
<td style="border:1px solid" align="center">newed</td>
<td style="border:1px solid" align="center">digest<br>sign</td>
<td style="border:1px solid" align="center">verify</td>
<td style="border:1px solid" align="center">verify<br>recover</td>
<td style="border:1px solid" align="center">encrypt</td>
<td style="border:1px solid" align="center">decrypt</td>
<td style="border:1px solid" align="center">derive</td>
<td style="border:1px solid" align="center">encapsulate</td>
<td style="border:1px solid" align="center">decapsulate</td>
<td style="border:1px solid" align="center">parameter<br>generation</td>
<td style="border:1px solid" align="center">key<br>generation</td>
<td style="border:1px solid" align="center"></td>
</tr>
<tr><th style="border:1px solid" align="left">EVP_PKEY_CTX_free</th>
<td style="border:1px solid" align="center">freed</td>
<td style="border:1px solid" align="center">freed</td>
<td style="border:1px solid" align="center">freed</td>
<td style="border:1px solid" align="center">freed</td>
<td style="border:1px solid" align="center">freed</td>
<td style="border:1px solid" align="center">freed</td>
<td style="border:1px solid" align="center">freed</td>
<td style="border:1px solid" align="center">freed</td>
<td style="border:1px solid" align="center">freed</td>
<td style="border:1px solid" align="center">freed</td>
<td style="border:1px solid" align="center">freed</td>
<td style="border:1px solid" align="center">freed</td>
<td style="border:1px solid" align="center"></td>
</tr>
</table>
=end html
=head1 NOTES
At some point the EVP layer will begin enforcing the transitions described
herein.
=head1 SEE ALSO
L<EVP_PKEY_new(3)>,
L<EVP_PKEY_decapsulate(3)>, L<EVP_PKEY_decrypt(3)>, L<EVP_PKEY_encapsulate(3)>,
L<EVP_PKEY_encrypt(3)>, L<EVP_PKEY_derive(3)>, L<EVP_PKEY_keygen(3)>,
L<EVP_PKEY_sign(3)>, L<EVP_PKEY_verify(3)>, L<EVP_PKEY_verify_recover(3)>
=head1 HISTORY
The provider PKEY interface was introduced in OpenSSL 3.0.
=head1 COPYRIGHT
Copyright 2021 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the Apache License 2.0 (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file LICENSE in the source distribution or at
L<https://www.openssl.org/source/license.html>.
=cut
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