Function fromHash [src]

Map a 64-bit hash into an Edwards25519 point

Prototype

pub fn fromHash(h: [64]u8) Edwards25519

Parameters

h: [64]u8

Source

  pub fn fromHash(h: [64]u8) Edwards25519 {
    const fe_f = Fe.fromBytes64(h);
    var elr = elligator2(fe_f);

    const y_sign = !elr.not_square;
    const y_neg = elr.y.neg();
    elr.y.cMov(y_neg, @intFromBool(elr.y.isNegative()) ^ @intFromBool(y_sign));
    return montToEd(elr.x, elr.y).clearCofactor();
}  