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Title "EVP_KDF-PKCS12KDF 7ossl" For nroff, turn off justification. Always turn off hyphenation; it makes
way too many mistakes in technical documents.
EVP_KDF-PKCS12KDF - The PKCS#12 EVP_KDF implementation Header "DESCRIPTION" Support for computing the PKCS#12 password-based \s-1KDF\s0 through the \s-1EVP_KDF\s0 \s-1API.\s0

The \s-1EVP_KDF-PKCS12KDF\s0 algorithm implements the PKCS#12 password-based key derivation function, as described in appendix B of \s-1RFC 7292\s0 (\s-1PKCS\s0 #12: Personal Information Exchange Syntax); it derives a key from a password using a salt, iteration count and the intended usage.

Subsection "Identity" \*(L"\s-1PKCS12KDF\*(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>" Item "properties (OSSL_KDF_PARAM_PROPERTIES) <UTF8 string>" 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 "id (OSSL_KDF_PARAM_PKCS12_ID) <integer>" This parameter is used to specify the intended usage of the output bits, as per \s-1RFC 7292\s0 section B.3.

Header "NOTES" This algorithm is not available in the \s-1FIPS\s0 provider as it is not \s-1FIPS\s0 approvable.

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-1RFC7292\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), \s-1OSSL_PROVIDER-FIPS\s0\|(7) Header "HISTORY" This functionality was added in OpenSSL 3.0. Header "COPYRIGHT" Copyright 2020-2023 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>.