[#EC_GROUP_get_curve]
= EC_GROUP_get_curve
:mrdocs:

Gets the parameters of the ec curve defined by yˆ2 = xˆ3 + a*x + b (for GFp) or yˆ2 + x_y = xˆ3 + a_xˆ2 + b (for GF2m)

== Synopsis

Declared in `<openssl/ec.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
EC_GROUP_get_curve(
    xref:EC_GROUP.adoc[EC_GROUP] const* group,
    xref:BIGNUM.adoc[BIGNUM]* p,
    xref:BIGNUM.adoc[BIGNUM]* a,
    xref:BIGNUM.adoc[BIGNUM]* b,
    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
| *p*
| BIGNUM with the prime number (GFp) or the polynomial defining the underlying field (GF2m)
| *a*
| BIGNUM for parameter a of the equation
| *b*
| BIGNUM for parameter b of the equation
| *ctx*
| BN_CTX object (optional)
|===


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