Class Curve25519PublicKey

Namespace

Yubico.YubiKey.Cryptography

Assembly

Yubico.YubiKey.dll

Represents a Curve25519 public key.

public sealed class Curve25519PublicKey : PublicKey, IPublicKey, IKeyBase

Inheritance

object

PublicKey

Curve25519PublicKey

Implements

IPublicKey

IKeyBase

Extension Methods

IPublicKeyExtensions.Cast<T>(IPublicKey)

KeyExtensions.EncodeAsPiv(IPublicKey)

Remarks

This sealed class encapsulates Curve25519 public key data as a compressed point and supports both Ed25519 and X25519 key types. It also provides factory methods for creating instances from public point values or DER-encoded data.

Properties

KeyDefinition

Gets the key definition associated with this RSA private key.

public KeyDefinition KeyDefinition { get; }

Property Value

KeyDefinition

A KeyDefinition object that describes the key's properties, including its type and length.

KeyType

Gets the type of the cryptographic key.

public override KeyType KeyType { get; }

Property Value

KeyType

A KeyType value indicating the type of the key.

PublicPoint

Gets the bytes representing the public key coordinates as a compressed point.

public ReadOnlyMemory<byte> PublicPoint { get; }

Property Value

ReadOnlyMemory<byte>

A System.ReadOnlyMemory<T> containing the public key bytes.

Remarks

The public key is represented as a byte array, which is the raw public key data.

Methods

CreateFromSubjectPublicKeyInfo(ReadOnlyMemory<byte>)

Creates a new instance of Curve25519PublicKey from a DER-encoded SubjectPublicKeyInfo.

public static Curve25519PublicKey CreateFromSubjectPublicKeyInfo(ReadOnlyMemory<byte> subjectPublicKeyInfo)

Parameters

subjectPublicKeyInfo ReadOnlyMemory<byte>

The DER-encoded SubjectPublicKeyInfo.

Returns

Curve25519PublicKey

A new instance of Curve25519PublicKey.

Exceptions

CryptographicException

Thrown if the subjectPublicKeyInfo is invalid.

CreateFromValue(ReadOnlyMemory<byte>, KeyType)

Creates an instance of Curve25519PublicKey from the given publicPoint and keyType.

public static Curve25519PublicKey CreateFromValue(ReadOnlyMemory<byte> publicPoint, KeyType keyType)

Parameters

publicPoint ReadOnlyMemory<byte>

The raw public key data, formatted as an compressed point.

keyType KeyType

The type of key this is.

Returns

Curve25519PublicKey

An instance of Curve25519PublicKey.

Exceptions

ArgumentException

Thrown if the public key data length is not valid.

ExportSubjectPublicKeyInfo()

Converts this public key to an ASN.1 DER encoded format (X.509 SubjectPublicKeyInfo).

public override byte[] ExportSubjectPublicKeyInfo()

Returns

byte[]

A byte array containing the ASN.1 DER encoded public key.