Package com.nimbusds.jose.crypto

Class Ed25519Verifier

java.lang.Object

com.nimbusds.jose.crypto.impl.BaseJWSProvider

com.nimbusds.jose.crypto.impl.EdDSAProvider

com.nimbusds.jose.crypto.Ed25519Verifier

All Implemented Interfaces:

CriticalHeaderParamsAware, JCAAware<JCAContext>, JOSEProvider, JWSProvider, JWSVerifier

@ThreadSafe
public class Ed25519Verifier
extends EdDSAProvider
implements JWSVerifier, CriticalHeaderParamsAware

Ed25519 verifier of JWS objects. Expects a public OctetKeyPair with "crv" Ed25519. Uses the Edwards-curve Digital Signature Algorithm (EdDSA).

See RFC 8037 for more information.

This class is thread-safe.

Supports the following algorithm:

• JWSAlgorithm.EdDSA

with the following curve:

• Curve.Ed25519

Version:

2018-07-11

Author:

Tim McLean

Field Summary

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

SUPPORTED_ALGORITHMS

Constructor Summary

Constructors

Constructor	Description
Ed25519Verifier(OctetKeyPair publicKey)	Creates a new Ed25519 verifier.
Ed25519Verifier(OctetKeyPair publicKey, Set<String> defCritHeaders)	Creates a Ed25519 verifier.

Method Summary

Modifier and Type	Method	Description
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.
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.
boolean	verify(JWSHeader header, byte[] signedContent, Base64URL signature)	Verifies the specified signature of a JWS object.

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

getJCAContext, supportedJWSAlgorithms

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.jca.JCAAware

getJCAContext

Methods inherited from interface com.nimbusds.jose.JWSProvider

supportedJWSAlgorithms

Constructor Detail

Ed25519Verifier

public Ed25519Verifier(OctetKeyPair publicKey)
                throws JOSEException

Creates a new Ed25519 verifier.

Parameters:

publicKey - The public Ed25519 key. Must not be null.

Throws:

JOSEException - If the key subtype is not supported

Ed25519Verifier

public Ed25519Verifier(OctetKeyPair publicKey,
                       Set<String> defCritHeaders)
                throws JOSEException

Creates a Ed25519 verifier.

Parameters:

publicKey - The public Ed25519 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

getPublicKey

public OctetKeyPair getPublicKey()

Returns the public key.

Returns:

An OctetKeyPair without the private part

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.

verify

public boolean verify(JWSHeader header,
                      byte[] signedContent,
                      Base64URL signature)
               throws JOSEException

Description copied from interface: JWSVerifier

Verifies the specified signature of a JWS object.

Specified by:

verify in interface JWSVerifier

Parameters:

header - The JSON Web Signature (JWS) header. Must specify a supported JWS algorithm and must not be null.

signedContent - The signing input. Must not be null.

signature - The signature part of the JWS object. Must not be null.

Returns:

true if the signature was successfully verified, false if the signature is invalid or if a critical header is neither supported nor marked for deferral to the application.

Throws:

JOSEException - If the JWS algorithm is not supported, or if signature verification failed for some other internal reason.