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.
"PBKDF1" is the name for this implementation; it can be used with the EVP_KDF_fetch() function.
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).
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.
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)
This functionality was added in OpenSSL 3.0.
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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>.