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org.bouncycastle.crypto.asymmetric

public Class NamedECDomainParameters

extends ECDomainParameters
Class Inheritance
Imports
java.math.BigInteger, org.bouncycastle.asn1.ASN1ObjectIdentifier, org.bouncycastle.math.ec.ECCurve, .ECPoint
EC domain parameters associated with a specific object identifier.

Field Summary

Modifier and TypeField and Description
private ASN1ObjectIdentifier
id

Constructor Summary

AccessConstructor and Description
public
NamedECDomainParameters(ASN1ObjectIdentifier
the object identifier that represents these parameters.
id, ECCurve
the curve for these domain parameters.
curve, ECPoint
the base point G for the domain parameters.
G, BigInteger
the order for the domain parameters.
n)

Constructor that assumes the co-factor h is 1.

public
NamedECDomainParameters(ASN1ObjectIdentifier
the object identifier that represents these parameters.
id, ECCurve
the curve for these domain parameters.
curve, ECPoint
the base point G for the domain parameters.
G, BigInteger
the order for the domain parameters.
n, BigInteger
the co-factor.
h)

Constructor with explicit co-factor.

public
NamedECDomainParameters(ASN1ObjectIdentifier
the object identifier that represents these parameters.
id, ECCurve
the curve for these domain parameters.
curve, ECPoint
the base point G for the domain parameters.
G, BigInteger
the order for the domain parameters.
n, BigInteger
the co-factor.
h, byte[]
the seed value used to generate the domain parameters.
seed)

Constructor with explicit co-factor and generation seed.

Method Summary

Modifier and TypeMethod and Description
public boolean
equals(Object
the reference object with which to compare.
o)

Overrides org.bouncycastle.crypto.asymmetric.ECDomainParameters.equals.

Indicates whether some other object is "equal to" this one.
public ASN1ObjectIdentifier

Returns:

the OID that names this parameter set.
getID()

Return object identifier that identifies these parameters.

public int
hashCode()

Overrides org.bouncycastle.crypto.asymmetric.ECDomainParameters.hashCode.

Returns a hash code value for this object.
Inherited from org.bouncycastle.crypto.asymmetric.ECDomainParameters:
decodeCurveParametersgetCurvegetGgetHgetInverseHgetNgetSeed

Field Detail

idback to summary
private ASN1ObjectIdentifier id

Constructor Detail

NamedECDomainParametersback to summary
public NamedECDomainParameters(ASN1ObjectIdentifier id, ECCurve curve, ECPoint G, BigInteger n)

Constructor that assumes the co-factor h is 1.

Parameters
id:ASN1ObjectIdentifier

the object identifier that represents these parameters.

curve:ECCurve

the curve for these domain parameters.

G:ECPoint

the base point G for the domain parameters.

n:BigInteger

the order for the domain parameters.

NamedECDomainParametersback to summary
public NamedECDomainParameters(ASN1ObjectIdentifier id, ECCurve curve, ECPoint G, BigInteger n, BigInteger h)

Constructor with explicit co-factor.

Parameters
id:ASN1ObjectIdentifier

the object identifier that represents these parameters.

curve:ECCurve

the curve for these domain parameters.

G:ECPoint

the base point G for the domain parameters.

n:BigInteger

the order for the domain parameters.

h:BigInteger

the co-factor.

NamedECDomainParametersback to summary
public NamedECDomainParameters(ASN1ObjectIdentifier id, ECCurve curve, ECPoint G, BigInteger n, BigInteger h, byte[] seed)

Constructor with explicit co-factor and generation seed.

Parameters
id:ASN1ObjectIdentifier

the object identifier that represents these parameters.

curve:ECCurve

the curve for these domain parameters.

G:ECPoint

the base point G for the domain parameters.

n:BigInteger

the order for the domain parameters.

h:BigInteger

the co-factor.

seed:byte[]

the seed value used to generate the domain parameters.

Method Detail

equalsback to summary
public boolean equals(Object o)

Overrides org.bouncycastle.crypto.asymmetric.ECDomainParameters.equals.

Doc from java.lang.Object.equals.

Indicates whether some other object is "equal to" this one.

The equals method implements an equivalence relation on non-null object references:

  • It is reflexive: for any non-null reference value x, x.equals(x) should return true.
  • It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
  • It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
  • It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
  • For any non-null reference value x, x.equals(null) should return false.

An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.

Parameters
o:Object

the reference object with which to compare.

Returns:boolean

true if this object is the same as the obj argument; false otherwise.

getIDback to summary
public ASN1ObjectIdentifier getID()

Return object identifier that identifies these parameters.

Returns:ASN1ObjectIdentifier

the OID that names this parameter set.

hashCodeback to summary
public int hashCode()

Overrides org.bouncycastle.crypto.asymmetric.ECDomainParameters.hashCode.

Doc from java.lang.Object.hashCode.

Returns a hash code value for this object. This method is supported for the benefit of hash tables such as those provided by java.util.HashMap.

The general contract of hashCode is:

  • Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
  • If two objects are equal according to the equals method, then calling the hashCode method on each of the two objects must produce the same integer result.
  • It is not required that if two objects are unequal according to the equals method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.
Returns:int

a hash code value for this object