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DHGenParameterSpec
public
class
DHGenParameterSpec
extends Object
implements
AlgorithmParameterSpec
This class specifies the set of parameters used for generating
Diffie-Hellman (system) parameters for use in Diffie-Hellman key
agreement. This is typically done by a central
authority.
The central authority, after computing the parameters, must send this
information to the parties looking to agree on a secret key.
Summary
Public constructors |
|---|
DHGenParameterSpec(int primeSize, int exponentSize)
Constructs a parameter set for the generation of Diffie-Hellman
(system) parameters.
|
Public methods |
|---|
int
|
getExponentSize()
Returns the size in bits of the random exponent (private value).
|
int
|
getPrimeSize()
Returns the size in bits of the prime modulus.
|
Inherited methods |
|---|
From class
java.lang.Object
Object
|
clone()
Creates and returns a copy of this object.
|
boolean
|
equals(Object obj)
Indicates whether some other object is "equal to" this one.
|
void
|
finalize()
Called by the garbage collector on an object when garbage collection
determines that there are no more references to the object.
|
final
Class<?>
|
getClass()
Returns the runtime class of this Object.
|
int
|
hashCode()
Returns a hash code value for the object.
|
final
void
|
notify()
Wakes up a single thread that is waiting on this object's
monitor.
|
final
void
|
notifyAll()
Wakes up all threads that are waiting on this object's monitor.
|
String
|
toString()
Returns a string representation of the object.
|
final
void
|
wait(long timeoutMillis, int nanos)
Causes the current thread to wait until it is awakened, typically
by being notified or interrupted, or until a
certain amount of real time has elapsed.
|
final
void
|
wait(long timeoutMillis)
Causes the current thread to wait until it is awakened, typically
by being notified or interrupted, or until a
certain amount of real time has elapsed.
|
final
void
|
wait()
Causes the current thread to wait until it is awakened, typically
by being notified or interrupted.
|
|
Public constructors
DHGenParameterSpec
public DHGenParameterSpec (int primeSize,
int exponentSize)
Constructs a parameter set for the generation of Diffie-Hellman
(system) parameters. The constructed parameter set can be used to
initialize an
AlgorithmParameterGenerator
object for the generation of Diffie-Hellman parameters.
| Parameters |
|---|
primeSize |
int: the size (in bits) of the prime modulus. |
exponentSize |
int: the size (in bits) of the random exponent. |
Public methods
getExponentSize
public int getExponentSize ()
Returns the size in bits of the random exponent (private value).
| Returns |
|---|
int |
the size in bits of the random exponent (private value) |
getPrimeSize
public int getPrimeSize ()
Returns the size in bits of the prime modulus.
| Returns |
|---|
int |
the size in bits of the prime modulus |
Content and code samples on this page are subject to the licenses described in the Content License. Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.
Last updated 2025-02-10 UTC.
[null,null,["Last updated 2025-02-10 UTC."],[],[],null,["# DHGenParameterSpec\n\nAdded in [API level 1](/guide/topics/manifest/uses-sdk-element#ApiLevels) \nSummary: [Ctors](#pubctors) \\| [Methods](#pubmethods) \\| [Inherited Methods](#inhmethods) \n\nDHGenParameterSpec\n==================\n\n\n`\npublic\n\n\nclass\nDHGenParameterSpec\n`\n\n\n`\n\nextends `[Object](/reference/java/lang/Object)`\n\n\n`\n\n`\n\n\nimplements\n\n`[AlgorithmParameterSpec](/reference/java/security/spec/AlgorithmParameterSpec)`\n\n\n`\n\n|---|--------------------------------------|\n| [java.lang.Object](/reference/java/lang/Object) ||\n| ↳ | javax.crypto.spec.DHGenParameterSpec |\n\n\u003cbr /\u003e\n\n*** ** * ** ***\n\nThis class specifies the set of parameters used for generating\nDiffie-Hellman (system) parameters for use in Diffie-Hellman key\nagreement. This is typically done by a central\nauthority.\n\nThe central authority, after computing the parameters, must send this\ninformation to the parties looking to agree on a secret key. \n**See also:**\n\n- [DHParameterSpec](/reference/javax/crypto/spec/DHParameterSpec)\n\nSummary\n-------\n\n| ### Public constructors ||\n|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---|\n| ` `[DHGenParameterSpec](/reference/javax/crypto/spec/DHGenParameterSpec#DHGenParameterSpec(int,%20int))`(int primeSize, int exponentSize) ` Constructs a parameter set for the generation of Diffie-Hellman (system) parameters. |\n\n| ### Public methods ||\n|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| ` int` | ` `[getExponentSize](/reference/javax/crypto/spec/DHGenParameterSpec#getExponentSize())`() ` Returns the size in bits of the random exponent (private value). |\n| ` int` | ` `[getPrimeSize](/reference/javax/crypto/spec/DHGenParameterSpec#getPrimeSize())`() ` Returns the size in bits of the prime modulus. |\n\n| ### Inherited methods |\n|-----------------------|---|\n| From class ` `[java.lang.Object](/reference/java/lang/Object)` ` |---------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` `[Object](/reference/java/lang/Object) | ` `[clone](/reference/java/lang/Object#clone())`() ` Creates and returns a copy of this object. | | ` boolean` | ` `[equals](/reference/java/lang/Object#equals(java.lang.Object))`(`[Object](/reference/java/lang/Object)` obj) ` Indicates whether some other object is \"equal to\" this one. | | ` void` | ` `[finalize](/reference/java/lang/Object#finalize())`() ` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. | | ` final `[Class](/reference/java/lang/Class)`\u003c?\u003e` | ` `[getClass](/reference/java/lang/Object#getClass())`() ` Returns the runtime class of this `Object`. | | ` int` | ` `[hashCode](/reference/java/lang/Object#hashCode())`() ` Returns a hash code value for the object. | | ` final void` | ` `[notify](/reference/java/lang/Object#notify())`() ` Wakes up a single thread that is waiting on this object's monitor. | | ` final void` | ` `[notifyAll](/reference/java/lang/Object#notifyAll())`() ` Wakes up all threads that are waiting on this object's monitor. | | ` `[String](/reference/java/lang/String) | ` `[toString](/reference/java/lang/Object#toString())`() ` Returns a string representation of the object. | | ` final void` | ` `[wait](/reference/java/lang/Object#wait(long,%20int))`(long timeoutMillis, int nanos) ` Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*, or until a certain amount of real time has elapsed. | | ` final void` | ` `[wait](/reference/java/lang/Object#wait(long))`(long timeoutMillis) ` Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*, or until a certain amount of real time has elapsed. | | ` final void` | ` `[wait](/reference/java/lang/Object#wait())`() ` Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*. | ||\n\nPublic constructors\n-------------------\n\n### DHGenParameterSpec\n\nAdded in [API level 1](/guide/topics/manifest/uses-sdk-element#ApiLevels) \n\n```\npublic DHGenParameterSpec (int primeSize, \n int exponentSize)\n```\n\nConstructs a parameter set for the generation of Diffie-Hellman\n(system) parameters. The constructed parameter set can be used to\ninitialize an\n[AlgorithmParameterGenerator](/reference/java/security/AlgorithmParameterGenerator)\nobject for the generation of Diffie-Hellman parameters.\n\n\u003cbr /\u003e\n\n| Parameters ||\n|----------------|----------------------------------------------------------|\n| `primeSize` | `int`: the size (in bits) of the prime modulus. \u003cbr /\u003e |\n| `exponentSize` | `int`: the size (in bits) of the random exponent. \u003cbr /\u003e |\n\nPublic methods\n--------------\n\n### getExponentSize\n\nAdded in [API level 1](/guide/topics/manifest/uses-sdk-element#ApiLevels) \n\n```\npublic int getExponentSize ()\n```\n\nReturns the size in bits of the random exponent (private value).\n\n\u003cbr /\u003e\n\n| Returns ||\n|-------|----------------------------------------------------------------|\n| `int` | the size in bits of the random exponent (private value) \u003cbr /\u003e |\n\n### getPrimeSize\n\nAdded in [API level 1](/guide/topics/manifest/uses-sdk-element#ApiLevels) \n\n```\npublic int getPrimeSize ()\n```\n\nReturns the size in bits of the prime modulus.\n\n\u003cbr /\u003e\n\n| Returns ||\n|-------|----------------------------------------------|\n| `int` | the size in bits of the prime modulus \u003cbr /\u003e |"]]
