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Title "EVP_KDF-PBKDF2 7" For nroff, turn off justification. Always turn off hyphenation; it makes
way too many mistakes in technical documents.
EVP_KDF-PBKDF2 - The PBKDF2 EVP_KDF implementation Header "DESCRIPTION" Support for computing the \s-1PBKDF2\s0 password-based \s-1KDF\s0 through the \s-1EVP_KDF\s0 \s-1API.\s0

The \s-1EVP_KDF-PBKDF2\s0 algorithm implements the \s-1PBKDF2\s0 password-based key derivation function, as described in \s-1SP800-132\s0; it derives a key from a password using a salt and iteration count.

Subsection "Identity" \*(L"\s-1PBKDF2\*(R"\s0 is the name for this implementation; it can be used with the EVP_KDF_fetch() function. Subsection "Supported parameters" The supported parameters are: Item "pass (OSSL_KDF_PARAM_PASSWORD) <octet string>"

0 Item "salt (OSSL_KDF_PARAM_SALT) <octet string>" Item "iter (OSSL_KDF_PARAM_ITER) <unsigned integer>"

This parameter has a default value of 2048. Item "properties (OSSL_KDF_PARAM_PROPERTIES) <UTF8 string>"

0 Item "digest (OSSL_KDF_PARAM_DIGEST) <UTF8 string>"

These parameters work as described in \*(L"\s-1PARAMETERS\*(R"\s0 in \s-1EVP_KDF\s0\|(3). Item "pkcs5 (OSSL_KDF_PARAM_PKCS5) <integer>" This parameter can be used to enable or disable \s-1SP800-132\s0 compliance checks. Setting the mode to 0 enables the compliance checks. .Sp The checks performed are:

Header "NOTES" A typical application of this algorithm is to derive keying material for an encryption algorithm from a password in the \*(L"pass\*(R", a salt in \*(L"salt\*(R", and an iteration count.

Increasing the \*(L"iter\*(R" 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.

Header "CONFORMING TO" \s-1SP800-132\s0 Header "SEE ALSO" \s-1EVP_KDF\s0\|(3), \fBEVP_KDF_CTX_new\|(3), \fBEVP_KDF_CTX_free\|(3), \fBEVP_KDF_CTX_set_params\|(3), \fBEVP_KDF_derive\|(3), \*(L"\s-1PARAMETERS\*(R"\s0 in \s-1EVP_KDF\s0\|(3) Header "HISTORY" This functionality was added in OpenSSL 3.0. Header "COPYRIGHT" Copyright 2018-2022 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the Apache License 2.0 (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.