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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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-02-10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 |"]]