public class EllipticCurve extends Object
ECField,
ECFieldFp,
ECFieldF2m| Constructor and Description |
|---|
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. |
| Modifier and Type | Method and Description |
|---|---|
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.
|
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.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 Objectobj - the object to be compared.obj is an instance of
EllipticCurve and the field, A, and B match, false otherwise.Object.hashCode(),
HashMappublic int hashCode()
hashCode in class Object
(field.hashCode() << 6) + (a.hashCode() << 4) + (b.hashCode() << 2)
Object.equals(java.lang.Object),
System.identityHashCode(java.lang.Object) Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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