com.nimbusds.jose.crypto

Class X25519EncrypterMulti

java.lang.Object

com.nimbusds.jose.crypto.impl.ECDHCryptoProvider

com.nimbusds.jose.crypto.X25519EncrypterMulti

All Implemented Interfaces:

JCAAware<JWEJCAContext>, JOSEProvider, JWEEncrypterMulti, JWEProvider

@ThreadSafe
public class X25519EncrypterMulti
extends ECDHCryptoProvider
implements JWEEncrypterMulti

Elliptic Curve Diffie-Hellman Multi-recipient encrypter of JWE objects for curves using EC JWK keys. Expects a public EC key (with a P-256, P-384, or P-521 curve).

Public Key Authenticated Encryption for JOSE ECDH-1PU for more information.

This class is thread-safe.

Supports the following key management algorithms:

• JWEAlgorithm.ECDH_ES
• JWEAlgorithm.ECDH_ES_A128KW
• JWEAlgorithm.ECDH_ES_A192KW
• JWEAlgorithm.ECDH_ES_A256KW

Supports the following elliptic curve:

• Curve.X25519 (Curve25519)

Supports the following content encryption algorithms:

• EncryptionMethod.A128CBC_HS256
• EncryptionMethod.A192CBC_HS384
• EncryptionMethod.A256CBC_HS512
• EncryptionMethod.A128GCM
• EncryptionMethod.A192GCM
• EncryptionMethod.A256GCM
• EncryptionMethod.A128CBC_HS256_DEPRECATED
• EncryptionMethod.A256CBC_HS512_DEPRECATED
• EncryptionMethod.XC20P

Version:

2021-08-18

Author:

Alexander Martynov

Field Summary

Fields

Modifier and Type	Field and Description
static Set<Curve>	SUPPORTED_ELLIPTIC_CURVES The supported EC JWK curves by the ECDH crypto provider class.

Fields inherited from class com.nimbusds.jose.crypto.impl.ECDHCryptoProvider

SUPPORTED_ALGORITHMS, SUPPORTED_ENCRYPTION_METHODS

Constructor Summary

Constructors

Constructor and Description
X25519EncrypterMulti(List<Pair<UnprotectedHeader,OctetKeyPair>> recipients) Creates a curve x25519 Elliptic Curve Diffie-Hellman Multi-recipient encryptor.

Method Summary

Modifier and Type	Method and Description
JWECryptoParts	encrypt(JWEHeader header, byte[] clearText) Encrypts the specified clear text of a JWE object.
JWEJCAContext	getJCAContext() Returns the Java Cryptography Architecture (JCA) context.
Set<Curve>	supportedEllipticCurves() Returns the names of the supported elliptic curves.
Set<EncryptionMethod>	supportedEncryptionMethods() Returns the names of the supported encryption methods by the JWE provier.
Set<JWEAlgorithm>	supportedJWEAlgorithms() Returns the names of the supported algorithms by the JWE provider instance.

Methods inherited from class com.nimbusds.jose.crypto.impl.ECDHCryptoProvider

decryptMulti, decryptWithZ, encryptMulti, encryptWithZ, encryptWithZ, getConcatKDF, getCurve

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.nimbusds.jose.JWEProvider

supportedEncryptionMethods, supportedJWEAlgorithms

Methods inherited from interface com.nimbusds.jose.jca.JCAAware

getJCAContext

Field Detail

SUPPORTED_ELLIPTIC_CURVES

public static final Set<Curve> SUPPORTED_ELLIPTIC_CURVES

The supported EC JWK curves by the ECDH crypto provider class.

Constructor Detail

X25519EncrypterMulti

public X25519EncrypterMulti(List<Pair<UnprotectedHeader,OctetKeyPair>> recipients)
                     throws JOSEException

Creates a curve x25519 Elliptic Curve Diffie-Hellman Multi-recipient encryptor.

Parameters:

recipients - The list of public recipient's keys.

Throws:

JOSEException - If the key subtype is not supported.

Method Detail

supportedEllipticCurves

public Set<Curve> supportedEllipticCurves()

Description copied from class: ECDHCryptoProvider

Returns the names of the supported elliptic curves. These correspond to the crv EC JWK parameter.

Specified by:

supportedEllipticCurves in class ECDHCryptoProvider

Returns:

The supported elliptic curves.

encrypt

public JWECryptoParts encrypt(JWEHeader header,
                              byte[] clearText)
                       throws JOSEException

Description copied from interface: JWEEncrypterMulti

Encrypts the specified clear text of a JWE object.

Specified by:

encrypt in interface JWEEncrypterMulti

Parameters:

header - The JSON Web Encryption (JWE) header. Must specify a supported JWE algorithm and method. Must not be null.

clearText - The clear text to encrypt. Must not be null.

Returns:

The resulting JWE crypto parts.

Throws:

JOSEException - If the JWE algorithm or method is not supported or if encryption failed for some other internal reason.

supportedJWEAlgorithms

public Set<JWEAlgorithm> supportedJWEAlgorithms()

Description copied from interface: JWEProvider

Returns the names of the supported algorithms by the JWE provider instance. These correspond to the alg JWE header parameter.

Specified by:

supportedJWEAlgorithms in interface JWEProvider

Returns:

The supported JWE algorithms, empty set if none.

supportedEncryptionMethods

public Set<EncryptionMethod> supportedEncryptionMethods()

Description copied from interface: JWEProvider

Returns the names of the supported encryption methods by the JWE provier. These correspond to the enc JWE header parameter.

Specified by:

supportedEncryptionMethods in interface JWEProvider

Returns:

The supported encryption methods, empty set if none.

getJCAContext

public JWEJCAContext getJCAContext()

Description copied from interface: JCAAware

Returns the Java Cryptography Architecture (JCA) context. May be used to set a specific JCA security provider or secure random generator.

Specified by:

getJCAContext in interface JCAAware<JWEJCAContext>

Returns:

The JCA context. Not null.