Class COSEEllipticCurves

java.lang.Object

com.authlete.cose.constants.COSEEllipticCurves

public final class COSEEllipticCurves
extends Object

COSE Elliptic Curves

Name	Value	Key Type	Description
P-256	1	EC2	NIST P-256 also known as secp256r1
P-384	2	EC2	NIST P-384 also known as secp384r1
P-521	3	EC2	NIST P-521 also known as secp521r1
X25519	4	OKP	X25519 for use w/ ECDH only
X448	5	OKP	X448 for use w/ ECDH only
Ed25519	6	OKP	Ed25519 for use w/ EdDSA only
Ed448	7	OKP	Ed448 for use w/ EdDSA only
secp256k1	8	EC2	Ed448 for use w/ EdDSA only

Since:

1.1

See Also:

• IANA: COSE Elliptic Curves

Field Summary

Fields

Modifier and Type	Field	Description
static final int	Ed25519	Ed25519 (6)
static final String	Ed25519_NAME	"Ed25519"
static final int	Ed448	Ed448 (7)
static final String	Ed448_NAME	"Ed448"
static final int	P_256	P-256 (1)
static final String	P_256_NAME	"P-256"
static final int	P_384	P-384 (2)
static final String	P_384_NAME	"P-384"
static final int	P_521	P-521 (3)
static final String	P_521_NAME	"P-521"
static final int	SECP256K1	secp256k1 (8)
static final String	SECP256K1_NAME	"secp256k1"
static final int	X25519	X25519 (4)
static final String	X25519_NAME	"X25519"
static final int	X448	X448 (5)
static final String	X448_NAME	"X448"

Method Summary

Modifier and Type	Method	Description
static String	getNameByValue(int value)	Get the name of the elliptic curve to which the integer identifier has been assigned to.
static int	getValueByName(String name)	Get the integer identifier assigned to the elliptic curve.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

P_256

public static final int P_256

P-256 (1)

See Also:

• Constant Field Values

P_384

public static final int P_384

P-384 (2)

See Also:

• Constant Field Values

P_521

public static final int P_521

P-521 (3)

See Also:

• Constant Field Values

X25519

public static final int X25519

X25519 (4)

See Also:

• Constant Field Values

X448

public static final int X448

X448 (5)

See Also:

• Constant Field Values

Ed25519

public static final int Ed25519

Ed25519 (6)

See Also:

• Constant Field Values

Ed448

public static final int Ed448

Ed448 (7)

See Also:

• Constant Field Values

SECP256K1

public static final int SECP256K1

secp256k1 (8)

See Also:

• Constant Field Values

P_256_NAME

public static final String P_256_NAME

"P-256"

Since:

1.5

See Also:

• Constant Field Values

P_384_NAME

public static final String P_384_NAME

"P-384"

Since:

1.5

See Also:

• Constant Field Values

P_521_NAME

public static final String P_521_NAME

"P-521"

Since:

1.5

See Also:

• Constant Field Values

X25519_NAME

public static final String X25519_NAME

"X25519"

Since:

1.5

See Also:

• Constant Field Values

X448_NAME

public static final String X448_NAME

"X448"

Since:

1.5

See Also:

• Constant Field Values

Ed25519_NAME

public static final String Ed25519_NAME

"Ed25519"

Since:

1.5

See Also:

• Constant Field Values

Ed448_NAME

public static final String Ed448_NAME

"Ed448"

Since:

1.5

See Also:

• Constant Field Values

SECP256K1_NAME

public static final String SECP256K1_NAME

"secp256k1"

Since:

1.5

See Also:

• Constant Field Values

Method Details

getValueByName

public static int getValueByName(String name)

Get the integer identifier assigned to the elliptic curve.

Parameters:

name - An elliptic curve name such as "P-256". If null is given, 0 is returned.

Returns:

The integer identifier assigned to the elliptic curve. If the given name is not recognized, 0 is returned.

getNameByValue

public static String getNameByValue(int value)

Get the name of the elliptic curve to which the integer identifier has been assigned to.

Parameters:

value - An integer identifier assigned to an elliptic curve.

Returns:

The name of the elliptic curve to which the integer identifier has been assigned to. If the given identifier is not recognized, null is returned.