man > EVP_KDF-PKCS12KDF(7SSL)

EVP_KDF-PKCS12KDF(7SSL)                        OpenSSL                       EVP_KDF-PKCS12KDF(7SSL)

NAME
       EVP_KDF-PKCS12KDF - The PKCS#12 EVP_KDF implementation

DESCRIPTION
       Support for computing the PKCS#12 password-based KDF through the EVP_KDF API.

       The EVP_KDF-PKCS12KDF algorithm implements the PKCS#12 password-based key derivation
       function, as described in appendix B of RFC 7292 (PKCS #12: Personal Information Exchange
       Syntax); it derives a key from a password using a salt, iteration count and the intended
       usage.

   Identity
       "PKCS12KDF" is the name for this implementation; it can be used with the EVP_KDF_fetch()
       function.

   Supported parameters
       The supported parameters are:

       "pass" (OSSL_KDF_PARAM_PASSWORD) <octet string>
       "salt" (OSSL_KDF_PARAM_SALT) <octet string>
       "iter" (OSSL_KDF_PARAM_ITER) <unsigned integer>
       "properties" (OSSL_KDF_PARAM_PROPERTIES) <UTF8 string>
       "digest" (OSSL_KDF_PARAM_DIGEST) <UTF8 string>
           These parameters work as described in "PARAMETERS" in EVP_KDF(3).

       "id" (OSSL_KDF_PARAM_PKCS12_ID) <integer>
           This  parameter is used to specify the intended usage of the output bits, as per RFC 7292
           section B.3.

NOTES
       This algorithm is not available in the FIPS provider as it is not FIPS approvable.

       A typical application of this algorithm is  to  derive  keying  material  for  an  encryption
       algorithm from a password in the "pass", a salt in "salt", and an iteration count.

       Increasing  the  "iter"  parameter  slows  down  the  algorithm  which makes it harder for an
       attacker to perform a brute force attack using a large number of candidate passwords.

       No assumption is made regarding the given password; it is simply treated as a byte sequence.

CONFORMING TO
       RFC7292

SEE ALSO
       EVP_KDF(3),     EVP_KDF_CTX_new(3),      EVP_KDF_CTX_free(3),      EVP_KDF_CTX_set_params(3),
       EVP_KDF_derive(3), "PARAMETERS" in EVP_KDF(3), OSSL_PROVIDER-FIPS(7)

HISTORY
       This functionality was added in OpenSSL 3.0.

COPYRIGHT
       Copyright 2020-2023 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_KDF-PKCS12KDF(7SSL)