CoseEcPublicKey Constructor

CoseEcPublicKey(CoseEcCurve, ReadOnlyMemory<Byte>, ReadOnlyMemory<Byte>)

Construct a CoseEcPublicKey based on the curve and point.

C#

public CoseEcPublicKey(CoseEcCurve curve, ReadOnlyMemory<byte> xCoordinate, ReadOnlyMemory<byte> yCoordinate)

Parameters

Type	Name	Description
CoseEcCurve	curve	The curve for this public key.
System.ReadOnlyMemory<System.Byte>	xCoordinate	The x-coordinate of the public point.
System.ReadOnlyMemory<System.Byte>	yCoordinate	The y-coordinate of the public point.

Exceptions

Type	Condition
System.ArgumentException	The encodedPoint is not a correct EC Point encoding.

Remarks

An ECC public key is a curve and public point. This class supports only one curve: NIST P-256 (CoseEcCurve.P256). This constructor expects the length of each coordinate to be at least one byte and 32 bytes or fewer.

CoseEcPublicKey(ReadOnlyMemory<Byte>)

Construct a CoseEcPublicKey based on the CBOR encoding of a COSE_Key.

C#

public CoseEcPublicKey(ReadOnlyMemory<byte> encodedCoseKey)

Parameters

Type	Name	Description
System.ReadOnlyMemory<System.Byte>	encodedCoseKey	The CBOR encoding.

Exceptions

Type	Condition
Ctap2DataException	The encodedCoseKey is not a correct EC Public Key encoding.

CoseEcPublicKey(ECParameters)

Construct a CoseEcPublicKey based on .NET elliptic curve parameters.

C#

public CoseEcPublicKey(ECParameters ecParameters)

Parameters

Type	Name	Description
System.Security.Cryptography.ECParameters	ecParameters	An ECParameters structure with a specified Curve and a public point Q.

Exceptions

Type	Condition
System.ArgumentException	The ECParameters object does not contain a valid curve and
System.NotSupportedException	The parameters/public key specified is not supported.