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EVP_KDF_PBKDF2(7)                   OpenSSL                  EVP_KDF_PBKDF2(7)
NAME
       EVP_KDF_PBKDF2 - The PBKDF2 EVP_KDF implementation
DESCRIPTION
       Support for computing the PBKDF2 password-based KDF through the EVP_KDF
       API.
       The EVP_KDF_PBKDF2 algorithm implements the PBKDF2 password-based key
       derivation function, as described in RFC 2898; it derives a key from a
       password using a salt and iteration count.
   Numeric identity
       EVP_KDF_PBKDF2 is the numeric identity for this implementation; it can
       be used with the EVP_KDF_CTX_new_id() function.
   Supported controls
       The supported controls are:
       EVP_KDF_CTRL_SET_PASS
       EVP_KDF_CTRL_SET_SALT
       EVP_KDF_CTRL_SET_ITER
       EVP_KDF_CTRL_SET_MD
           These controls work as described in "CONTROLS" in EVP_KDF_CTX(3).
           iter is the iteration count and its value should be greater than or
           equal to 1. RFC 2898 suggests an iteration count of at least 1000.
           The default value is 2048.  Any iter less than 1 is treated as a
           single iteration.
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 2898
SEE ALSO
       EVP_KDF_CTX, EVP_KDF_CTX_new_id(3), EVP_KDF_CTX_free(3),
       EVP_KDF_ctrl(3), EVP_KDF_derive(3), "CONTROLS" in EVP_KDF_CTX(3)
COPYRIGHT
       Copyright 2018 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>;.
1.1.1k                            2024-10-09                 EVP_KDF_PBKDF2(7)