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XECPublicKey
public
interface
XECPublicKey
implements
PublicKey,
XECKey
| java.security.interfaces.XECPublicKey
|
An interface for an elliptic curve public key as defined by RFC 7748.
These keys are distinct from the keys represented by ECPublicKey,
and they are intended for use with algorithms based on RFC 7748 such as the
XDH KeyAgreement algorithm.
An XEC public key is a particular point on the curve, which is represented
using only its u-coordinate as described in RFC 7748. 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 constants |
|---|
|
|
From interface
java.security.Key
long |
serialVersionUID
This constant was deprecated
in API level 34.
A serialVersionUID field in an interface is
ineffectual. Do not use; no replacement.
|
|
Public methods |
|---|
abstract
BigInteger
|
getU()
Get the u coordinate of the point.
|
Inherited methods |
|---|
|
|
From interface
java.security.Key
abstract
String
|
getAlgorithm()
Returns the standard algorithm name for this key.
|
abstract
byte[]
|
getEncoded()
Returns the key in its primary encoding format, or null
if this key does not support encoding.
|
abstract
String
|
getFormat()
Returns the name of the primary encoding format of this key,
or null if this key does not support encoding.
|
|
Public methods
getU
public abstract 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.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-02-10 UTC."],[],[],null,["# XECPublicKey\n\nAdded in [API level 33](/guide/topics/manifest/uses-sdk-element#ApiLevels) \nSummary: [Inherited Constants](#inhconstants) \\| [Methods](#pubmethods) \\| [Inherited Methods](#inhmethods) \n\nXECPublicKey\n============\n\n\n`\npublic\n\n\ninterface\nXECPublicKey\n`\n\n\n`\n\n\nimplements\n\n`[PublicKey](/reference/java/security/PublicKey)`,\n\n`[XECKey](/reference/java/security/interfaces/XECKey)`\n\n\n`\n\n|---------------------------------------|\n| java.security.interfaces.XECPublicKey |\n\n\u003cbr /\u003e\n\n*** ** * ** ***\n\nAn interface for an elliptic curve public key as defined by RFC 7748.\nThese keys are distinct from the keys represented by `ECPublicKey`,\nand they are intended for use with algorithms based on RFC 7748 such as the\nXDH `KeyAgreement` algorithm.\n\nAn XEC public key is a particular point on the curve, which is represented\nusing only its u-coordinate as described in RFC 7748. A u-coordinate is an\nelement of the field of integers modulo some value that is determined by\nthe algorithm parameters. This field element is represented by a BigInteger\nwhich may hold any value. That is, the BigInteger is not restricted to the\nrange of canonical field elements.\n\nSummary\n-------\n\n| ### Inherited constants |\n|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| From interface [java.security.PublicKey](/reference/java/security/PublicKey) |--------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | `long` | [serialVersionUID](/reference/java/security/PublicKey#serialVersionUID) *This constant was deprecated in API level 34. A `serialVersionUID` field in an interface is ineffectual. Do not use; no replacement.* | |\n| From interface [java.security.Key](/reference/java/security/Key) |--------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | `long` | [serialVersionUID](/reference/java/security/Key#serialVersionUID) *This constant was deprecated in API level 34. A `serialVersionUID` field in an interface is ineffectual. Do not use; no replacement.* | |\n\n| ### Public methods ||\n|-----------------------------------------------------------|------------------------------------------------------------------------------------------------------------|\n| ` abstract `[BigInteger](/reference/java/math/BigInteger) | ` `[getU](/reference/java/security/interfaces/XECPublicKey#getU())`() ` Get the u coordinate of the point. |\n\n| ### Inherited methods |\n|-----------------------|---|\n| From interface ` `[java.security.interfaces.XECKey](/reference/java/security/interfaces/XECKey)` ` |--------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------| | ` abstract `[AlgorithmParameterSpec](/reference/java/security/spec/AlgorithmParameterSpec) | ` `[getParams](/reference/java/security/interfaces/XECKey#getParams())`() ` Returns the algorithm parameters associated with the key. | ||\n| From interface ` `[java.security.Key](/reference/java/security/Key)` ` |---------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` abstract `[String](/reference/java/lang/String) | ` `[getAlgorithm](/reference/java/security/Key#getAlgorithm())`() ` Returns the standard algorithm name for this key. | | ` abstract byte[]` | ` `[getEncoded](/reference/java/security/Key#getEncoded())`() ` Returns the key in its primary encoding format, or null if this key does not support encoding. | | ` abstract `[String](/reference/java/lang/String) | ` `[getFormat](/reference/java/security/Key#getFormat())`() ` Returns the name of the primary encoding format of this key, or null if this key does not support encoding. | ||\n\nPublic methods\n--------------\n\n### getU\n\nAdded in [API level 33](/guide/topics/manifest/uses-sdk-element#ApiLevels) \n\n```\npublic abstract 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 |"]]
