[#EVP_PKEY_param_check]
= EVP_PKEY_param_check
:mrdocs:

Validate domain parameters associated with a key context.

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
EVP_PKEY_param_check(xref:EVP_PKEY_CTX.adoc[EVP_PKEY_CTX]* ctx);
----

== Return Value

1 if parameters are valid, 0 if invalid, or a negative value on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Context holding parameters (or a key that embeds them).
|===


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