Updated: 2025/Nov/16

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OPENSSL-SKEYUTL(1)                  OpenSSL                 OPENSSL-SKEYUTL(1)


NAME
       openssl-skeyutl - opaque symmetric keys routines

SYNOPSIS
       openssl skeyutl [-help] [-cipher cipher] [-skeymgmt skeymgmt] [-skeyopt
       opt:value] [-genkey] [-provider name] [-provider-path path] [-provparam
       [name:]key=value] [-propquery propq]

DESCRIPTION
       Not all cipher implementations support keys as raw bytes. E.g. PKCS#11
       tokens can store them internally without any option to get the raw byte
       representation.

       This tool is designed for managing opaque symmetric keys.

OPTIONS
       -help
           Print out a usage message.

       -cipher cipher
           The cipher to generate the key for.

       -skeymgmt skeymgmt
           Some providers may support opaque symmetric keys objects. To use
           them, we need to know the skeymgmt. If not specified, the name of
           the cipher will be used.

           To find out the name of the suitable symmetric key management,
           please refer to the output of the "openssl list -skey-managers"
           command.

       -skeyopt opt:value
           To obtain an existing opaque symmetric key or to generate a new
           one, key options are specified as opt:value. These options can't be
           used together with any options implying raw key either directly or
           indirectly.

       -genkey
           Generate a new opaque key object.

       -provider name
       -provider-path path
       -provparam [name:]key=value
       -propquery propq
           See "Provider Options" in openssl(1), provider(7), and property(7).

SEE ALSO
       openssl-enc(1), EVP_SKEY(3)

HISTORY
       The skeyutl command was added in OpenSSL 3.5.

COPYRIGHT
       Copyright 2025 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>.

3.5.1                             2025-07-18                OPENSSL-SKEYUTL(1)