[#EC_GROUP_get_cofactor]
= EC_GROUP_get_cofactor
:mrdocs:

Gets the cofactor of a EC_GROUP

== Synopsis

Declared in `<openssl/ec.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
EC_GROUP_get_cofactor(
    xref:EC_GROUP.adoc[EC_GROUP] const* group,
    xref:BIGNUM.adoc[BIGNUM]* cofactor,
    xref:BN_CTX.adoc[BN_CTX]* ctx);
----

== Return Value

1 on success and 0 if an error occurred

== Parameters

[cols="1,4"]
|===
| Name| Description
| *group*
| EC_GROUP object
| *cofactor*
| BIGNUM to which the cofactor is copied
| *ctx*
| unused
|===


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