[#PBKDF2PARAM_st]
= PBKDF2PARAM_st
:mrdocs:

PKCS#5 PBKDF2 parameters: salt, iteration count, optional key length, and PRF.

== Synopsis

Declared in `<openssl/x509.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
struct PBKDF2PARAM_st;
----

== Data Members

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



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