NAME

Crypt::ECDSA::Point -- Elliptic curve points for EC cryptography

DESCRIPTION

These are for use with Crypt::ECDSA, a cryptography module.

METHODS

  Constructor.  Takes the following named pair arguments:
  
  X           => x coordinate,
  Y           => y coordinate,
  curve       => Crypt::ECDSA::Curve derived curve,
  order       => point order,
  is_infinity => set to 1 if this is to be the point at infinity  (optional)

X

  Returns or sets the point's x coordinate

Y

  Returns or sets the point's y coordinate

order

  returns or sets the point order, if known

order

  Returns or sets the Crypt::ECDSA::Curve upon which the point exists

is_point_at_infinity

  Returns 1 if the point is the point at infinity for the EC curve, 
  otherwise undef.

deep_copy

  Overloaded to '='
  Returns a new point that copies the internals of the point (a cloned copy 
  rather than just a reference).

add

  my $P3 = $P1 + $P2;

  Overloaded to '+'
  Returns the point that is the sum of two points on the curve

double

  my $double = $p->double(); 

  returns a point that is the point's double on the curve.

multiply

  my $Q = $G * $d;

  Multiply a point by a scalar (not a point by a point!)

  Overloaded to '*'
  Note: in order to be sure the proper multiply is done, I suggest that a mutiply
  of point $P by scalar $k be written $P * $k, not $k * $P.

is_equal_to

  if( $p1 == $p2) { ; }

  Overloaded to '=='
  Returns 1 if the points are equal (on the same curve as well).

Class Internal Functions

curve
from_octet
inverse
is_on_curve
to_octet

AUTHOR

   William Herrera B<wherrera@skylightview.com>.

SUPPORT

Questions, feature requests and bug reports should go to <wherrera@skylightview.com>.

COPYRIGHT

Copyright (c) 2007 William Herrera. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

CPAN RT