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>.