public class EllipticCurve extends Object
Constructor | Description |
---|---|
EllipticCurve |
Creates an elliptic curve with the specified elliptic field field and the coefficients a and b . |
EllipticCurve |
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 | Description |
---|---|---|
boolean |
equals |
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)
public int hashCode()
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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/security/spec/EllipticCurve.html