compact1, compact2, compact3
java.security.spec
Class ECParameterSpec
- java.lang.Object
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- java.security.spec.ECParameterSpec
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- All Implemented Interfaces:
- AlgorithmParameterSpec
public class ECParameterSpec extends Object implements AlgorithmParameterSpec
This immutable class specifies the set of domain parameters used with elliptic curve cryptography (ECC).- Since:
- 1.5
- See Also:
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AlgorithmParameterSpec
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Constructor Summary
Constructors Constructor and Description ECParameterSpec(EllipticCurve curve, ECPoint g, BigInteger n, int h)Creates elliptic curve domain parameters based on the specified values.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method and Description intgetCofactor()Returns the cofactor.EllipticCurvegetCurve()Returns the elliptic curve that this parameter defines.ECPointgetGenerator()Returns the generator which is also known as the base point.BigIntegergetOrder()Returns the order of the generator.
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Constructor Detail
ECParameterSpec
public ECParameterSpec(EllipticCurve curve, ECPoint g, BigInteger n, int h)
Creates elliptic curve domain parameters based on the specified values.- Parameters:
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curve- the elliptic curve which this parameter defines. -
g- the generator which is also known as the base point. -
n- the order of the generatorg. -
h- the cofactor. - Throws:
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NullPointerException- ifcurve,g, ornis null. -
IllegalArgumentException- ifnorhis not positive.
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Method Detail
getCurve
public EllipticCurve getCurve()
Returns the elliptic curve that this parameter defines.- Returns:
- the elliptic curve that this parameter defines.
getGenerator
public ECPoint getGenerator()
Returns the generator which is also known as the base point.- Returns:
- the generator which is also known as the base point.
getOrder
public BigInteger getOrder()
Returns the order of the generator.- Returns:
- the order of the generator.
getCofactor
public int getCofactor()
Returns the cofactor.- Returns:
- the cofactor.
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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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