[#PBKDF2PARAM_st]
= PBKDF2PARAM&lowbar;st
:mrdocs:

PKCS&num;5 PBKDF2 parameters&colon; salt, iteration count, optional key length, and PRF&period;

== Synopsis

Declared in `&lt;openssl&sol;x509&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
struct PBKDF2PARAM&lowbar;st;
----

== Data Members

[cols="1,4"]
|===
| Name| Description
| xref:PBKDF2PARAM_st/iter.adoc[`iter`] 
| PBKDF2 iteration count&period;
| xref:PBKDF2PARAM_st/keylength.adoc[`keylength`] 
| Optional derived key length in octets&semi; NULL means the cipher default&period;
| xref:PBKDF2PARAM_st/prf.adoc[`prf`] 
| Pseudorandom function AlgorithmIdentifier (defaults to HMAC&hyphen;SHA1 when absent)&period;
| xref:PBKDF2PARAM_st/salt.adoc[`salt`] 
| Salt value&semi; usually an OCTET STRING but may be another ASN&period;1 type&period;
|===



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