man > EVP_KDF-PBKDF1(7ssl)

EVP_KDF-PBKDF1(7SSL)                           OpenSSL                          EVP_KDF-PBKDF1(7SSL)

NAME
       EVP_KDF-PBKDF1 - The PBKDF1 EVP_KDF implementation

DESCRIPTION
       Support for computing the PBKDF1 password-based KDF through the EVP_KDF API.

       The EVP_KDF-PBKDF1 algorithm implements the PBKDF1 password-based key derivation function, as
       described in RFC 8018; it derives a key from a password using a salt and iteration count.

   Identity
       "PBKDF1" 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>
           This parameter has a default value of 0 and should be set.

       "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).

NOTES
       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
       RFC 8018

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)

HISTORY
       This functionality was added in OpenSSL 3.0.

COPYRIGHT
       Copyright 2021 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-PBKDF1(7SSL)