EC_GROUP_get_curve

Gets the parameters of the ec curve defined by y^2 = x^3 + a*x + b (for GFp) or y^2 + xy = x^3 + ax^2 + b (for GF2m)

Synopsis

Declared in <openssl/ec.h>

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

Return Value

1 on success and 0 if an error occurred

Parameters

NameDescription
groupEC_GROUP object
pBIGNUM with the prime number (GFp) or the polynomial defining the underlying field (GF2m)
aBIGNUM for parameter a of the equation
bBIGNUM for parameter b of the equation
ctxBN_CTX object (optional)