Bouncy Castle Provider (FIPS Distribution) 1.0.2.5 · org.bouncycastle.crypto.asymmetric.ECDomainParameters

Modifier and Type	Field and Description
private final ECCurve	curve
private final ECPoint	G
private final BigInteger	h
private volatile BigInteger	hInv
private final BigInteger	n
private final byte[]	seed

Access	Constructor and Description
public	ECDomainParameters(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	ECDomainParameters(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	ECDomainParameters(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 Type	Method and Description
pack-priv static ECDomainParameters	decodeCurveParameters(AlgorithmIdentifier algId)
public boolean	equals(Object the reference object with which to compare. o) Overrides java.lang.Object.equals. Indicates whether some other object is "equal to" this one.
public ECCurve	Returns: the domain parameters' curve. getCurve() Return the curve associated with these domain parameters.
public ECPoint	Returns: the domain parameters' base point. getG() Return the base point associated with these domain parameters.
public BigInteger	Returns: the domain parameters' co-factor. getH() Return the co-factor associated with these domain parameters.
public BigInteger	Returns: inverse of H. getInverseH() Return the multiplicative inverse of H over the order N.
public BigInteger	Returns: the domain parameters' order. getN() Return the order associated with these domain parameters.
public byte[]	Returns: the domain parameters' seed. getSeed() Return the generation seed associated with these domain parameters.
public int	hashCode() Overrides java.lang.Object.hashCode. Returns a hash code value for this object.

Inherited from java.lang.Object:: clone finalize getClass notify notifyAll toString wait wait wait

Field Detail

curve	back to summary
private final ECCurve curve

G	back to summary
private final ECPoint G

h	back to summary
private final BigInteger h

hInv	back to summary
private volatile BigInteger hInv

n	back to summary
private final BigInteger n

seed	back to summary
private final byte[] seed

Constructor Detail

ECDomainParameters	back to summary
public ECDomainParameters(ECCurve curve, ECPoint G, BigInteger n) Constructor that assumes the co-factor h is 1. 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.

ECDomainParameters

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public ECDomainParameters(ECCurve curve, ECPoint G, BigInteger n)

Constructor that assumes the co-factor h is 1.

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.

ECDomainParameters	back to summary
public ECDomainParameters(ECCurve curve, ECPoint G, BigInteger n, BigInteger h) Constructor with explicit co-factor. 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.

ECDomainParameters

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public ECDomainParameters(ECCurve curve, ECPoint G, BigInteger n, BigInteger h)

Constructor with explicit co-factor.

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.

ECDomainParameters	back to summary
public ECDomainParameters(ECCurve curve, ECPoint G, BigInteger n, BigInteger h, byte[] seed) Constructor with explicit co-factor and generation seed. 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.

ECDomainParameters

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public ECDomainParameters(ECCurve curve, ECPoint G, BigInteger n, BigInteger h, byte[] seed)

Constructor with explicit co-factor and generation seed.

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

decodeCurveParameters	back to summary
pack-priv static ECDomainParameters decodeCurveParameters(AlgorithmIdentifier algId)

equals back to summary

equals	back to summary
public boolean equals(Object o) Overrides java.lang.Object.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. Annotations @Override

public boolean equals(Object o)

Overrides java.lang.Object.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.

Annotations

@Override

getCurve	back to summary
public ECCurve getCurve() Return the curve associated with these domain parameters. Returns:ECCurve the domain parameters' curve.

getCurve

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public ECCurve getCurve()

Return the curve associated with these domain parameters.

Returns:ECCurve: the domain parameters' curve.

getG	back to summary
public ECPoint getG() Return the base point associated with these domain parameters. Returns:ECPoint the domain parameters' base point.

getG

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public ECPoint getG()

Return the base point associated with these domain parameters.

Returns:ECPoint: the domain parameters' base point.

getH	back to summary
public BigInteger getH() Return the co-factor associated with these domain parameters. Returns:BigInteger the domain parameters' co-factor.

getH

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public BigInteger getH()

Return the co-factor associated with these domain parameters.

Returns:BigInteger: the domain parameters' co-factor.

getInverseH	back to summary
public BigInteger getInverseH() Return the multiplicative inverse of H over the order N. Returns:BigInteger inverse of H.

getInverseH

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public BigInteger getInverseH()

Return the multiplicative inverse of H over the order N.

Returns:BigInteger: inverse of H.

getN	back to summary
public BigInteger getN() Return the order associated with these domain parameters. Returns:BigInteger the domain parameters' order.

getN

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public BigInteger getN()

Return the order associated with these domain parameters.

Returns:BigInteger: the domain parameters' order.

getSeed	back to summary
public byte[] getSeed() Return the generation seed associated with these domain parameters. Returns:byte[] the domain parameters' seed.

getSeed

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public byte[] getSeed()

Return the generation seed associated with these domain parameters.

Returns:byte[]: the domain parameters' seed.

hashCode back to summary

hashCode	back to summary
public int hashCode() Overrides java.lang.Object.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 Annotations @Override

public int hashCode()

Overrides java.lang.Object.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

Annotations

@Override

public Class ECDomainParameters

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