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>.
3.5.4 2025-09-30 EVP_KDF-PKCS12KDF(7SSL)
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