Package com.nimbusds.jose

Class JWSAlgorithm

java.lang.Object

com.nimbusds.jose.Algorithm

com.nimbusds.jose.JWSAlgorithm

All Implemented Interfaces:

Serializable

@Immutable
public final class JWSAlgorithm
extends Algorithm

JSON Web Signature (JWS) algorithm name, represents the alg header parameter in JWS objects. Also used to represent integrity algorithm (ia) header parameters in JWE objects. This class is immutable.

Includes constants for the following standard JWS algorithm names:

• HS256
• HS384
• HS512
• RS256
• RS384
• RS512
• ES256
• ES256K
• ES384
• ES512
• PS256
• PS384
• PS512
• EdDSA

Additional JWS algorithm names can be defined using the constructors.

Version:

2018-03-28

Author:

Vladimir Dzhuvinov, Aleksei Doroganov

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	JWSAlgorithm.Family	JWS algorithm family.

Field Summary

Fields

Modifier and Type	Field	Description
static final JWSAlgorithm	EdDSA	EdDSA signature algorithms (optional).
static final JWSAlgorithm	ES256	ECDSA using P-256 (secp256r1) curve and SHA-256 hash algorithm (recommended).
static final JWSAlgorithm	ES256K	ECDSA using P-256K (secp256k1) curve and SHA-256 hash algorithm (optional).
static final JWSAlgorithm	ES384	ECDSA using P-384 curve and SHA-384 hash algorithm (optional).
static final JWSAlgorithm	ES512	ECDSA using P-521 curve and SHA-512 hash algorithm (optional).
static final JWSAlgorithm	HS256	HMAC using SHA-256 hash algorithm (required).
static final JWSAlgorithm	HS384	HMAC using SHA-384 hash algorithm (optional).
static final JWSAlgorithm	HS512	HMAC using SHA-512 hash algorithm (optional).
static final JWSAlgorithm	PS256	RSASSA-PSS using SHA-256 hash algorithm and MGF1 mask generation function with SHA-256 (optional).
static final JWSAlgorithm	PS384	RSASSA-PSS using SHA-384 hash algorithm and MGF1 mask generation function with SHA-384 (optional).
static final JWSAlgorithm	PS512	RSASSA-PSS using SHA-512 hash algorithm and MGF1 mask generation function with SHA-512 (optional).
static final JWSAlgorithm	RS256	RSASSA-PKCS-v1_5 using SHA-256 hash algorithm (recommended).
static final JWSAlgorithm	RS384	RSASSA-PKCS-v1_5 using SHA-384 hash algorithm (optional).
static final JWSAlgorithm	RS512	RSASSA-PKCS-v1_5 using SHA-512 hash algorithm (optional).

Fields inherited from class com.nimbusds.jose.Algorithm

NONE

Constructor Summary

Constructors

Constructor	Description
JWSAlgorithm(String name)	Creates a new JSON Web Signature (JWS) algorithm name.
JWSAlgorithm(String name, Requirement req)	Creates a new JSON Web Signature (JWS) algorithm name.

Method Summary

Modifier and Type	Method	Description
static JWSAlgorithm	parse(String s)	Parses a JWS algorithm from the specified string.

Methods inherited from class com.nimbusds.jose.Algorithm

equals, getName, getRequirement, hashCode, toJSONString, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

HS256

public static final JWSAlgorithm HS256

HMAC using SHA-256 hash algorithm (required).

HS384

public static final JWSAlgorithm HS384

HMAC using SHA-384 hash algorithm (optional).

HS512

public static final JWSAlgorithm HS512

HMAC using SHA-512 hash algorithm (optional).

RS256

public static final JWSAlgorithm RS256

RSASSA-PKCS-v1_5 using SHA-256 hash algorithm (recommended).

RS384

public static final JWSAlgorithm RS384

RSASSA-PKCS-v1_5 using SHA-384 hash algorithm (optional).

RS512

public static final JWSAlgorithm RS512

RSASSA-PKCS-v1_5 using SHA-512 hash algorithm (optional).

ES256

public static final JWSAlgorithm ES256

ECDSA using P-256 (secp256r1) curve and SHA-256 hash algorithm (recommended).

ES256K

public static final JWSAlgorithm ES256K

ECDSA using P-256K (secp256k1) curve and SHA-256 hash algorithm (optional).

ES384

public static final JWSAlgorithm ES384

ECDSA using P-384 curve and SHA-384 hash algorithm (optional).

ES512

public static final JWSAlgorithm ES512

ECDSA using P-521 curve and SHA-512 hash algorithm (optional).

PS256

public static final JWSAlgorithm PS256

RSASSA-PSS using SHA-256 hash algorithm and MGF1 mask generation function with SHA-256 (optional).

PS384

public static final JWSAlgorithm PS384

RSASSA-PSS using SHA-384 hash algorithm and MGF1 mask generation function with SHA-384 (optional).

PS512

public static final JWSAlgorithm PS512

RSASSA-PSS using SHA-512 hash algorithm and MGF1 mask generation function with SHA-512 (optional).

EdDSA

public static final JWSAlgorithm EdDSA

EdDSA signature algorithms (optional).

Constructor Details

JWSAlgorithm

public JWSAlgorithm(String name,
 Requirement req)

Creates a new JSON Web Signature (JWS) algorithm name.

Parameters:

name - The algorithm name. Must not be null.

req - The implementation requirement, null if not known.

JWSAlgorithm

public JWSAlgorithm(String name)

Creates a new JSON Web Signature (JWS) algorithm name.

Parameters:

name - The algorithm name. Must not be null.

Method Details

parse

public static JWSAlgorithm parse(String s)

Parses a JWS algorithm from the specified string.

Parameters:

s - The string to parse. Must not be null.

Returns:

The JWS algorithm (matching standard algorithm constant, else a newly created algorithm).