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.\" ========================================================================
.\"
.IX Title "EVP_KEM-RSA 7ossl"
.TH EVP_KEM-RSA 7ossl "2024-10-22" "3.4.0" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.nh
.SH "NAME"
EVP_KEM\-RSA
\&\- EVP_KEM RSA keytype and algorithm support
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \fB\s-1RSA\s0\fR keytype and its parameters are described in \s-1\fBEVP_PKEY\-RSA\s0\fR\|(7).
See \fBEVP_PKEY_encapsulate\fR\|(3) and \fBEVP_PKEY_decapsulate\fR\|(3) for more info.
.SS "\s-1RSA KEM\s0 parameters"
.IX Subsection "RSA KEM parameters"
.ie n .IP """operation"" (\fB\s-1OSSL_KEM_PARAM_OPERATION\s0\fR) <\s-1UTF8\s0 string>" 4
.el .IP "``operation'' (\fB\s-1OSSL_KEM_PARAM_OPERATION\s0\fR) <\s-1UTF8\s0 string>" 4
.IX Item "operation (OSSL_KEM_PARAM_OPERATION) <UTF8 string>"
The OpenSSL \s-1RSA\s0 Key Encapsulation Mechanism only currently supports the
following operation
.RS 4
.ie n .IP """\s-1RSASVE""\s0" 4
.el .IP "``\s-1RSASVE''\s0" 4
.IX Item "RSASVE"
The encapsulate function simply generates a secret using random bytes and then
encrypts the secret using the \s-1RSA\s0 public key (with no padding).
The decapsulate function recovers the secret using the \s-1RSA\s0 private key.
.RE
.RS 4
.Sp
This can be set using \fBEVP_PKEY_CTX_set_kem_op()\fR.
.RE
.ie n .IP """fips-indicator"" (\fB\s-1OSSL_KEM_PARAM_FIPS_APPROVED_INDICATOR\s0\fR) <integer>" 4
.el .IP "``fips-indicator'' (\fB\s-1OSSL_KEM_PARAM_FIPS_APPROVED_INDICATOR\s0\fR) <integer>" 4
.IX Item "fips-indicator (OSSL_KEM_PARAM_FIPS_APPROVED_INDICATOR) <integer>"
.PD 0
.ie n .IP """key-check"" (\fB\s-1OSSL_KEM_PARAM_FIPS_KEY_CHECK\s0\fR) <integer>" 4
.el .IP "``key-check'' (\fB\s-1OSSL_KEM_PARAM_FIPS_KEY_CHECK\s0\fR) <integer>" 4
.IX Item "key-check (OSSL_KEM_PARAM_FIPS_KEY_CHECK) <integer>"
.PD
These parameters are described in \fBprovider\-kem\fR\|(7).
.SH "CONFORMING TO"
.IX Header "CONFORMING TO"
.IP "SP800\-56Br2" 4
.IX Item "SP800-56Br2"
Section 7.2.1.2 \s-1RSASVE\s0 Generate Operation (\s-1RSASVE.GENERATE\s0).
Section 7.2.1.3 \s-1RSASVE\s0 Recovery Operation (\s-1RSASVE.RECOVER\s0).
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBEVP_PKEY_CTX_set_kem_op\fR\|(3),
\&\fBEVP_PKEY_encapsulate\fR\|(3),
\&\fBEVP_PKEY_decapsulate\fR\|(3)
\&\s-1\fBEVP_KEYMGMT\s0\fR\|(3),
\&\s-1\fBEVP_PKEY\s0\fR\|(3),
\&\fBprovider\-keymgmt\fR\|(7)
.SH "HISTORY"
.IX Header "HISTORY"
This functionality was added in OpenSSL 3.0.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2020\-2024 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the Apache License 2.0 (the \*(L"License\*(R").  You may not use
this file except in compliance with the License.  You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.