java.lang.Object java.security.spec.EllipticCurve
This immutable class holds the necessary values needed to represent an elliptic curve.
ECField
,
ECFieldFp
,
ECFieldF2m
Constructor Summary  

EllipticCurve(ECField field,
BigInteger a,
BigInteger b)
Creates an elliptic curve with the specified elliptic field field and the coefficients a and
b . 

EllipticCurve(ECField field,
BigInteger a,
BigInteger b,
byte[] seed)
Creates an elliptic curve with the specified elliptic field field , the coefficients a and
b , and the seed used for curve generation. 
Method Summary  

boolean 
equals(Object obj)
Compares this elliptic curve for equality with the specified object. 
BigInteger 
getA()
Returns the first coefficient a of the
elliptic curve. 
BigInteger 
getB()
Returns the second coefficient b of the
elliptic curve. 
ECField 
getField()
Returns the finite field field that this
elliptic curve is over. 
byte[] 
getSeed()
Returns the seeding bytes seed used
during curve generation. 
int 
hashCode()
Returns a hash code value for this elliptic curve. 
Methods inherited from class java.lang.Object 

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait 
Constructor Detail 

public EllipticCurve(ECField field, BigInteger a, BigInteger b)
field
and the coefficients a
and
b
.
field
 the finite field that this elliptic curve is over.a
 the first coefficient of this elliptic curve.b
 the second coefficient of this elliptic curve.
NullPointerException
 if field
,
a
, or b
is null.
IllegalArgumentException
 if a
or b
is not null and not in field
.public EllipticCurve(ECField field, BigInteger a, BigInteger b, byte[] seed)
field
, the coefficients a
and
b
, and the seed
used for curve generation.
field
 the finite field that this elliptic curve is over.a
 the first coefficient of this elliptic curve.b
 the second coefficient of this elliptic curve.seed
 the bytes used during curve generation for later
validation. Contents of this array are copied to protect against
subsequent modification.
NullPointerException
 if field
,
a
, or b
is null.
IllegalArgumentException
 if a
or b
is not null and not in field
.Method Detail 

public ECField getField()
field
that this
elliptic curve is over.
field
that this curve
is over.public BigInteger getA()
a
of the
elliptic curve.
a
.public BigInteger getB()
b
of the
elliptic curve.
b
.public byte[] getSeed()
seed
used
during curve generation. May be null if not specified.
seed
. A new
array is returned each time this method is called.public boolean equals(Object obj)
equals
in class Object
obj
 the object to be compared.
obj
is an instance of
EllipticCurve and the field, A, B, and seeding bytes
match, false otherwise.Object.hashCode()
,
Hashtable
public int hashCode()
hashCode
in class Object
Object.equals(java.lang.Object)
,
Hashtable