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java.lang.Object | +--javax.crypto.spec.DHParameterSpec
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.
KeyAgreement| Constructor Summary | |
|---|---|
DHParameterSpec(java.math.BigInteger p,
java.math.BigInteger g)
Constructs a parameter set for Diffie-Hellman, using a prime modulus p and a base generator g. |
|
DHParameterSpec(java.math.BigInteger p,
java.math.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). |
|
| Method Summary | |
|---|---|
java.math.BigInteger |
getG()
Returns the base generator g. |
int |
getL()
Returns the size in bits, l, of the random exponent
(private value). |
java.math.BigInteger |
getP()
Returns the prime modulus p. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
public DHParameterSpec(java.math.BigInteger p,
java.math.BigInteger g)
p and a base generator g.
p - the prime modulusg - the base generator
public DHParameterSpec(java.math.BigInteger p,
java.math.BigInteger g,
int l)
p, a base generator g, and the size in bits,
l, of the random exponent (private value).
p - the prime modulusg - the base generatorl - the size in bits of the random exponent (private value)| Method Detail |
public java.math.BigInteger getP()
p.
ppublic java.math.BigInteger getG()
g.
gpublic int getL()
l, of the random exponent
(private value).
l, of the random exponent
(private value), or 0 if this size has not been set
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