程序包 javax.crypto.spec

类 DHParameterSpec

java.lang.Object

javax.crypto.spec.DHParameterSpec

所有已实现的接口:

AlgorithmParameterSpec

public class DHParameterSpec
extends Object
implements AlgorithmParameterSpec

This class specifies the set of parameters used with the Diffie-Hellman algorithm, as specified in PKCS #3: Diffie-Hellman Key-Agreement Standard.

A central authority generates parameters and gives them to the two entities seeking to generate a secret key. The parameters are a prime p, a base g, and optionally the length in bits of the private value, l.

It is possible that more than one instance of parameters may be generated by a given central authority, and that there may be more than one central authority. Indeed, each individual may be its own central authority, with different entities having different parameters.

Note that this class does not perform any validation on specified parameters. Thus, the specified values are returned directly even if they are null.

从以下版本开始:

1.4

另请参阅:

KeyAgreement

构造器概要

构造器

构造器	说明
DHParameterSpec(BigInteger p, BigInteger g)	Constructs a parameter set for Diffie-Hellman, using a prime modulus p and a base generator g.
DHParameterSpec(BigInteger p, BigInteger g, int l)	Constructs a parameter set for Diffie-Hellman, using a prime modulus p, a base generator g, and the size in bits, l, of the random exponent (private value).

方法概要

限定符和类型	方法	说明
BigInteger	getG()	Returns the base generator g.
int	getL()	Returns the size in bits, l, of the random exponent (private value).
BigInteger	getP()	Returns the prime modulus p.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

DHParameterSpec

public DHParameterSpec(BigInteger p,
                       BigInteger g)

Constructs a parameter set for Diffie-Hellman, using a prime modulus p and a base generator g.

参数:

p - the prime modulus

g - the base generator

DHParameterSpec

public DHParameterSpec(BigInteger p,
                       BigInteger g,
                       int l)

Constructs a parameter set for Diffie-Hellman, using a prime modulus p, a base generator g, and the size in bits, l, of the random exponent (private value).

参数:

p - the prime modulus

g - the base generator

l - the size in bits of the random exponent (private value)

方法详细资料

getP

public BigInteger getP()

Returns the prime modulus p.

返回:

the prime modulus p

getG

public BigInteger getG()

Returns the base generator g.

返回:

the base generator g

getL

public int getL()

Returns the size in bits, l, of the random exponent (private value).

返回:

the size in bits, l, of the random exponent (private value), or 0 if this size has not been set