[#PBKDF2PARAM_st-prf]
= xref:PBKDF2PARAM_st.adoc[PBKDF2PARAM_st]::prf
:relfileprefix: ../
:mrdocs:

Pseudorandom function AlgorithmIdentifier (defaults to HMAC‐SHA1 when absent).

== Synopsis

Declared in `<openssl/x509.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
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xref:X509_ALGOR.adoc[X509_ALGOR]* prf;
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