[#EVP_PKEY_CTX_set_ec_param_enc]
= EVP_PKEY_CTX_set_ec_param_enc
:mrdocs:

Select whether EC parameters are encoded as a named curve or explicitly.

== Synopsis

Declared in `<openssl/ec.h>`

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

== Return Value

1 on success, or a negative value on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| EVP_PKEY context for EC parameter or key generation.
| *param_enc*
| OPENSSL_EC_NAMED_CURVE or OPENSSL_EC_EXPLICIT_CURVE.
|===


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