[#X509_algor_st-parameter]
= xref:X509_algor_st.adoc[X509_algor_st]::parameter
:relfileprefix: ../
:mrdocs:

Optional algorithm parameters, or NULL when parameters are absent/NULL.

== Synopsis

Declared in `<openssl/x509.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
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xref:ASN1_TYPE.adoc[ASN1_TYPE]* parameter;
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