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Class javax.crypto.spec.DHParameterSpec
java.lang.Object
|
+----javax.crypto.spec.DHParameterSpec
- 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.
- See Also:
- KeyAgreement, AlgorithmParameters, AlgorithmParameterSpec
-
ident
-
-
DHParameterSpec(BigInteger, BigInteger)
- Specifies the Diffie-Hellman parameters, using a prime modulus p
and a base generator g.
-
DHParameterSpec(BigInteger, BigInteger, int)
- Specifies the Diffie-Hellman parameters, using a prime modulus p, a
base generator g, and the size in bits, l, of the random exponent
(private value).
-
getG()
- Returns the base generator g.
-
getL()
- Returns the size in bits, l, of the random exponent (private value).
-
getP()
- Returns the prime modulus p.
ident
public static final String ident
DHParameterSpec
public DHParameterSpec(BigInteger p,
BigInteger g)
- Specifies the Diffie-Hellman parameters, using a prime modulus p
and a base generator g.
- Parameters:
- p - - the prime modulus
- g - - the base generator
DHParameterSpec
public DHParameterSpec(BigInteger p,
BigInteger g,
int l)
- Specifies the Diffie-Hellman parameters, using a prime modulus p, a
base generator g, and the size in bits, l, of the random exponent
(private value).
- Parameters:
- p - the prime modulus
- g - the base generator
- l - the size in bits of the random exponent (private value)
getP
public BigInteger getP()
- Returns the prime modulus p.
- Returns:
- the prime modulus p
getG
public BigInteger getG()
- Returns the base generator g.
- Returns:
- the base generator g
getL
public int getL()
- Returns the size in bits, l, of the random exponent (private value).
- Returns:
- the size in bits, l, of the random exponent (private value),
or 0 if this size has not been set
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