function X9ECParameters(name) {
var params = algs.curves[name];
assert.object(params);
var p = new jsbn(params.p);
var a = new jsbn(params.a);
var b = new jsbn(params.b);
var n = new jsbn(params.n);
var h = jsbn.ONE;
var curve = new ec.ECCurveFp(p, a, b);
var G = curve.decodePointHex(params.G.toString('hex'));
this.curve = curve;
this.g = G;
this.n = n;
this.h = h;
}
function publicFromPrivateECDSA(curveName, priv) {
assert.string(curveName, 'curveName');
assert.buffer(priv);
var params = algs.curves[curveName];
var p = new jsbn(params.p);
var a = new jsbn(params.a);
var b = new jsbn(params.b);
var curve = new ec.ECCurveFp(p, a, b);
var G = curve.decodePointHex(params.G.toString('hex'));
var d = new jsbn(mpNormalize(priv));
var pub = G.multiply(d);
pub = Buffer.from(curve.encodePointHex(pub), 'hex');
var parts = [];
parts.push({name: 'curve', data: Buffer.from(curveName)});
parts.push({name: 'Q', data: pub});
var key = new Key({type: 'ecdsa', curve: curve, parts: parts});
return (key);
}