# EVP_KEM-RSA - man(7) - [phpMan]

[_EVP_KEM-RSA_(7SSL)](https://www.chedong.com/phpMan.php/man/EVPKEM-RSA/7SSL/markdown)                              OpenSSL                             [_EVP_KEM-RSA_(7SSL)](https://www.chedong.com/phpMan.php/man/EVPKEM-RSA/7SSL/markdown)

## NAME
       EVP_KEM-RSA - EVP_KEM RSA keytype and algorithm support

## DESCRIPTION
       The **RSA **keytype and its parameters are described in [**EVP_PKEY-RSA**(7)](https://www.chedong.com/phpMan.php/man/EVPPKEY-RSA/7/markdown).  See
       [**EVP_PKEY_encapsulate**(3)](https://www.chedong.com/phpMan.php/man/EVPPKEYencapsulate/3/markdown) and [**EVP_PKEY_decapsulate**(3)](https://www.chedong.com/phpMan.php/man/EVPPKEYdecapsulate/3/markdown) for more info.

### RSA KEM parameters
       "operation" (**OSSL_KEM_PARAM_OPERATION**) <UTF8 string>
           The  OpenSSL  RSA  Key  Encapsulation  Mechanism  only  currently  supports the following
           operation

           "RSASVE"
               The encapsulate function simply generates  a  secret  using  random  bytes  and  then
               encrypts  the  secret  using  the  RSA public key (with no padding).  The decapsulate
               function recovers the secret using the RSA private key.

           This can be set using **EVP_PKEY_CTX_set_kem_op()**.

## CONFORMING TO
       SP800-56Br2
           Section 7.2.1.2 RSASVE Generate  Operation  (RSASVE.GENERATE).   Section  7.2.1.3  RSASVE
           Recovery Operation (RSASVE.RECOVER).

## SEE ALSO
       [**EVP_PKEY_CTX_set_kem_op**(3)](https://www.chedong.com/phpMan.php/man/EVPPKEYCTXsetkemop/3/markdown),  [**EVP_PKEY_encapsulate**(3)](https://www.chedong.com/phpMan.php/man/EVPPKEYencapsulate/3/markdown), [**EVP_PKEY_decapsulate**(3)](https://www.chedong.com/phpMan.php/man/EVPPKEYdecapsulate/3/markdown) [**EVP_KEYMGMT**(3)](https://www.chedong.com/phpMan.php/man/EVPKEYMGMT/3/markdown),
       [**EVP_PKEY**(3)](https://www.chedong.com/phpMan.php/man/EVPPKEY/3/markdown), [**provider-keymgmt**(7)](https://www.chedong.com/phpMan.php/man/provider-keymgmt/7/markdown)

## HISTORY
       This functionality was added in OpenSSL 3.0.

## COPYRIGHT
       Copyright 2020 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 <<https://www.openssl.org/source/license.html>>.

3.0.13                                       2026-07-29                            [_EVP_KEM-RSA_(7SSL)](https://www.chedong.com/phpMan.php/man/EVPKEM-RSA/7SSL/markdown)