| java.lang.Object | |
| ↳ | java.security.spec.ECParameterSpec |
 Known Direct Subclasses
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Class Overview
This immutable class specifies the set of domain parameters used with elliptic curve cryptography (ECC).
See Also
Summary
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Creates elliptic curve domain parameters based on the
specified values.
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Returns the cofactor.
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Returns the elliptic curve that this parameter defines.
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Returns the generator which is also known as the base point.
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Returns the order of the generator.
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Inherited Methods | |||||||||||
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From class
java.lang.Object
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Public Constructors
public ECParameterSpec (EllipticCurve curve, ECPoint g, BigInteger n, int h)
Creates elliptic curve domain parameters based on the specified values.
Parameters
| curve | the elliptic curve which this parameter defines. |
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| g | the generator which is also known as the base point. |
| n | the order of the generator g. |
| h | the cofactor. |
Throws
| NullPointerException | if curve,
g, or n is null. |
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| IllegalArgumentException | if n
or h is not positive.
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Public Methods
public int getCofactor ()
Returns the cofactor.
Returns
- the cofactor.
public EllipticCurve getCurve ()
Returns the elliptic curve that this parameter defines.
Returns
- the elliptic curve that this parameter defines.
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.
public BigInteger getOrder ()
Returns the order of the generator.
Returns
- the order of the generator.