Sets the parameters of an 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>

int
EC_GROUP_set_curve(
    EC_GROUP* group,
    BIGNUM const* p,
    BIGNUM const* a,
    BIGNUM const* b,
    BN_CTX* ctx);

Return Value

1 on success and 0 if an error occurred

Parameters

Name

Description

group

EC_GROUP object

p

BIGNUM with the prime number (GFp) or the polynomial defining the underlying field (GF2m)

a

BIGNUM with parameter a of the equation

b

BIGNUM with parameter b of the equation

ctx

BN_CTX object (optional)

Created with MrDocs