Class javax.crypto.spec.DHParameterSpec
java.lang.Object
|
+----javax.crypto.spec.DHParameterSpec
- public class DHParameterSpec
- extends java.lang.Object
- implements java.security.spec.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, java.security.AlgorithmParameters, java.security.spec.AlgorithmParameterSpec
Constructor Summary
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DHParameterSpec(java.math.BigInteger p,
java.math.BigInteger g)
Specifies the Diffie-Hellman parameters, using a prime modulus
p and a base generator g .
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DHParameterSpec(java.math.BigInteger p,
java.math.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).
|
Method Summary
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java.math.BigInteger
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getG()
Returns the base generator g .
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int
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getL()
Returns the size in bits, l , of the random exponent
(private value).
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java.math.BigInteger
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getP()
Returns the prime modulus p .
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Methods inherited from class java.lang.Object
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
DHParameterSpec
public DHParameterSpec(java.math.BigInteger p,
java.math.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(java.math.BigInteger p,
java.math.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 java.math.BigInteger getP()
- Returns the prime modulus
p
.
- Returns:
- the prime modulus
p
getG
public java.math.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