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XECPublicKeySpec
public
class
XECPublicKeySpec
extends Object
implements
KeySpec
A class representing elliptic curve public keys as defined in RFC 7748,
including the curve and other algorithm parameters. The public key is a
particular point on the curve, which is represented using only its
u-coordinate. A u-coordinate is an element of the field of integers modulo
some value that is determined by the algorithm parameters. This field
element is represented by a BigInteger which may hold any value. That is,
the BigInteger is not restricted to the range of canonical field elements.
Summary
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
XECPublicKeySpec
public XECPublicKeySpec (AlgorithmParameterSpec params,
BigInteger u)
Construct a public key spec using the supplied parameters and
u coordinate.
| Parameters |
|---|
params |
AlgorithmParameterSpec: the algorithm parameters |
u |
BigInteger: the u-coordinate of the point, represented using a BigInteger
which may hold any value |
Public methods
getParams
public AlgorithmParameterSpec getParams ()
Get the algorithm parameters that define the curve and other settings.
getU
public BigInteger getU ()
Get the u coordinate of the point.
| Returns |
|---|
BigInteger |
the u-coordinate, represented using a BigInteger which may hold
any value |
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,["# XECPublicKeySpec\n\nAdded in [API level 33](/guide/topics/manifest/uses-sdk-element#ApiLevels) \nSummary: [Ctors](#pubctors) \\| [Methods](#pubmethods) \\| [Inherited Methods](#inhmethods) \n\nXECPublicKeySpec\n================\n\n\n`\npublic\n\n\nclass\nXECPublicKeySpec\n`\n\n\n`\n\nextends `[Object](/reference/java/lang/Object)`\n\n\n`\n\n`\n\n\nimplements\n\n`[KeySpec](/reference/java/security/spec/KeySpec)`\n\n\n`\n\n|---|-------------------------------------|\n| [java.lang.Object](/reference/java/lang/Object) ||\n| ↳ | java.security.spec.XECPublicKeySpec |\n\n\u003cbr /\u003e\n\n*** ** * ** ***\n\nA class representing elliptic curve public keys as defined in RFC 7748,\nincluding the curve and other algorithm parameters. The public key is a\nparticular point on the curve, which is represented using only its\nu-coordinate. A u-coordinate is an element of the field of integers modulo\nsome value that is determined by the algorithm parameters. This field\nelement is represented by a BigInteger which may hold any value. That is,\nthe BigInteger is not restricted to the range of canonical field elements.\n\nSummary\n-------\n\n| ### Public constructors ||\n|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---|\n| ` `[XECPublicKeySpec](/reference/java/security/spec/XECPublicKeySpec#XECPublicKeySpec(java.security.spec.AlgorithmParameterSpec,%20java.math.BigInteger))`(`[AlgorithmParameterSpec](/reference/java/security/spec/AlgorithmParameterSpec)` params, `[BigInteger](/reference/java/math/BigInteger)` u) ` Construct a public key spec using the supplied parameters and u coordinate. |\n\n| ### Public methods ||\n|-----------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------|\n| ` `[AlgorithmParameterSpec](/reference/java/security/spec/AlgorithmParameterSpec) | ` `[getParams](/reference/java/security/spec/XECPublicKeySpec#getParams())`() ` Get the algorithm parameters that define the curve and other settings. |\n| ` `[BigInteger](/reference/java/math/BigInteger) | ` `[getU](/reference/java/security/spec/XECPublicKeySpec#getU())`() ` Get the u coordinate of the point. |\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### XECPublicKeySpec\n\nAdded in [API level 33](/guide/topics/manifest/uses-sdk-element#ApiLevels) \n\n```\npublic XECPublicKeySpec (AlgorithmParameterSpec params, \n BigInteger u)\n```\n\nConstruct a public key spec using the supplied parameters and\nu coordinate.\n\n\u003cbr /\u003e\n\n| Parameters ||\n|----------|-------------------------------------------------------------------------------------------------------------|\n| `params` | `AlgorithmParameterSpec`: the algorithm parameters \u003cbr /\u003e |\n| `u` | `BigInteger`: the u-coordinate of the point, represented using a BigInteger which may hold any value \u003cbr /\u003e |\n\n| Throws ||\n|-------------------------------------------------------------------|-----------------------------|\n| [NullPointerException](/reference/java/lang/NullPointerException) | if `params` or `u` is null. |\n\nPublic methods\n--------------\n\n### getParams\n\nAdded in [API level 33](/guide/topics/manifest/uses-sdk-element#ApiLevels) \n\n```\npublic AlgorithmParameterSpec getParams ()\n```\n\nGet the algorithm parameters that define the curve and other settings.\n\n\u003cbr /\u003e\n\n| Returns ||\n|--------------------------------------------------------------------------------|-----------------------|\n| [AlgorithmParameterSpec](/reference/java/security/spec/AlgorithmParameterSpec) | the parameters \u003cbr /\u003e |\n\n### getU\n\nAdded in [API level 33](/guide/topics/manifest/uses-sdk-element#ApiLevels) \n\n```\npublic BigInteger getU ()\n```\n\nGet the u coordinate of the point.\n\n\u003cbr /\u003e\n\n| Returns ||\n|-----------------------------------------------|----------------------------------------------------------------------------------|\n| [BigInteger](/reference/java/math/BigInteger) | the u-coordinate, represented using a BigInteger which may hold any value \u003cbr /\u003e |"]]
