com.nimbusds.jose.crypto

Class ECDH1PUX25519Decrypter

java.lang.Object

com.nimbusds.jose.crypto.impl.ECDH1PUCryptoProvider

com.nimbusds.jose.crypto.ECDH1PUX25519Decrypter

All Implemented Interfaces:

CriticalHeaderParamsAware, JCAAware<JWEJCAContext>, JOSEProvider, JWEDecrypter, JWEProvider

@ThreadSafe
public class ECDH1PUX25519Decrypter
extends ECDH1PUCryptoProvider
implements JWEDecrypter, CriticalHeaderParamsAware

Elliptic Curve Diffie-Hellman decrypter of JWE objects for curves using an OKP JWK. Expects a private OctetKeyPair key with "crv" X25519.

See RFC 8037 for more information.

See also ECDH1PUDecrypter for ECDH on other curves.

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

This class is thread-safe.

Supports the following key management algorithms:

• JWEAlgorithm.ECDH_1PU
• JWEAlgorithm.ECDH_1PU_A128KW
• JWEAlgorithm.ECDH_1PU_A192KW
• JWEAlgorithm.ECDH_1PU_A256KW

Supports the following elliptic curves:

• Curve.X25519

Supports the following content encryption algorithms for Direct key agreement mode:

• 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

Supports the following content encryption algorithms for Key wrapping mode:

• EncryptionMethod.A128CBC_HS256
• EncryptionMethod.A192CBC_HS384
• EncryptionMethod.A256CBC_HS512

Version:

2021-08-03

Author:

Alexander Martynov

Field Summary

Fields inherited from class com.nimbusds.jose.crypto.impl.ECDH1PUCryptoProvider

SUPPORTED_ALGORITHMS, SUPPORTED_ENCRYPTION_METHODS

Constructor Summary

Constructors

Constructor and Description
ECDH1PUX25519Decrypter(OctetKeyPair privateKey, OctetKeyPair publicKey) Creates a new Curve25519 Elliptic Curve Diffie-Hellman decrypter.
ECDH1PUX25519Decrypter(OctetKeyPair privateKey, OctetKeyPair publicKey, Set<String> defCritHeaders) Creates a new Curve25519 Elliptic Curve Diffie-Hellman decrypter.

Method Summary

Modifier and Type	Method and Description
byte[]	decrypt(JWEHeader header, Base64URL encryptedKey, Base64URL iv, Base64URL cipherText, Base64URL authTag) Decrypts the specified cipher text of a JWE Object.
Set<String>	getDeferredCriticalHeaderParams() Returns the names of the critical (crit) header parameters that are deferred to the application for processing and will be ignored by the JWS verifier / JWE decrypter.
JWEJCAContext	getJCAContext() Returns the Java Cryptography Architecture (JCA) context.
OctetKeyPair	getPrivateKey() Returns the private key.
Set<String>	getProcessedCriticalHeaderParams() Returns the names of the critical (crit) header parameters that are understood and processed by the JWS verifier / JWE decrypter.
OctetKeyPair	getPublicKey() Returns the public key.
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.ECDH1PUCryptoProvider

decryptMulti, decryptWithZ, encryptMulti, 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

Constructor Detail

ECDH1PUX25519Decrypter

public ECDH1PUX25519Decrypter(OctetKeyPair privateKey,
                              OctetKeyPair publicKey)
                       throws JOSEException

Creates a new Curve25519 Elliptic Curve Diffie-Hellman decrypter.

Parameters:

privateKey - The private key. Must not be null.

publicKey - The private key. Must not be null.

Throws:

JOSEException - If the key subtype is not supported.

ECDH1PUX25519Decrypter

public ECDH1PUX25519Decrypter(OctetKeyPair privateKey,
                              OctetKeyPair publicKey,
                              Set<String> defCritHeaders)
                       throws JOSEException

Creates a new Curve25519 Elliptic Curve Diffie-Hellman decrypter.

Parameters:

privateKey - The private key. Must not be null.

publicKey - The private key. Must not be null.

defCritHeaders - The names of the critical header parameters that are deferred to the application for processing, empty set or null if none.

Throws:

JOSEException - If the key subtype is not supported.

Method Detail

supportedEllipticCurves

public Set<Curve> supportedEllipticCurves()

Description copied from class: ECDH1PUCryptoProvider

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

Specified by:

supportedEllipticCurves in class ECDH1PUCryptoProvider

Returns:

The supported elliptic curves.

getPrivateKey

public OctetKeyPair getPrivateKey()

Returns the private key.

Returns:

The private key.

getPublicKey

public OctetKeyPair getPublicKey()

Returns the public key.

Returns:

The public key.

getProcessedCriticalHeaderParams

public Set<String> getProcessedCriticalHeaderParams()

Description copied from interface: CriticalHeaderParamsAware

Returns the names of the critical (crit) header parameters that are understood and processed by the JWS verifier / JWE decrypter.

Specified by:

getProcessedCriticalHeaderParams in interface CriticalHeaderParamsAware

Returns:

The names of the critical header parameters that are understood and processed, empty set if none.

getDeferredCriticalHeaderParams

public Set<String> getDeferredCriticalHeaderParams()

Description copied from interface: CriticalHeaderParamsAware

Returns the names of the critical (crit) header parameters that are deferred to the application for processing and will be ignored by the JWS verifier / JWE decrypter.

Specified by:

getDeferredCriticalHeaderParams in interface CriticalHeaderParamsAware

Returns:

The names of the critical header parameters that are deferred to the application for processing, empty set if none.

decrypt

public byte[] decrypt(JWEHeader header,
                      Base64URL encryptedKey,
                      Base64URL iv,
                      Base64URL cipherText,
                      Base64URL authTag)
               throws JOSEException

Description copied from interface: JWEDecrypter

Decrypts the specified cipher text of a JWE Object.

Specified by:

decrypt in interface JWEDecrypter

Parameters:

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

encryptedKey - The encrypted key, null if not required by the JWE algorithm.

iv - The initialisation vector, null if not required by the JWE algorithm.

cipherText - The cipher text to decrypt. Must not be null.

authTag - The authentication tag, null if not required.

Returns:

The clear text.

Throws:

JOSEException - If the JWE algorithm or method is not supported, if a critical header parameter is not supported or marked for deferral to the application, or if decryption failed for some other 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.